/* CoverNice — 应用页（首页 / AI 封面生成器）
   2026-10-23 · 和 inspiration.html 共用一套语言：
   冷白纸底、墨字、单一深青主色、直角控件、1px 描边、无阴影卡片。
   外壳（token / nav / .btn / footer）来自 shell.css，这里只写页面自己的东西。 */

body{font-size:16px;line-height:1.55;background:var(--bg);color:var(--ink)}
[hidden]{display:none!important}
h1,h2,h3,h4{margin:0;color:var(--ink)}
p{margin:0}
button{font-family:inherit}

/* ---------- 顶栏：studio 模式下换成步骤条 ---------- */
.site-head,.nav{position:sticky;top:0;z-index:50}
.brand{border:0;background:none;padding:0;cursor:pointer;color:var(--ink)}
.step-track{display:none;align-items:center;gap:6px;margin-left:auto}
.track-item{display:inline-flex;align-items:center;gap:7px;height:30px;padding:0 10px;
  font-size:11.5px;color:var(--ink50);letter-spacing:.02em}
.track-item i{width:7px;height:7px;display:block;background:rgba(15,46,61,.22)}
.track-item.is-on{background:var(--bg2);color:var(--ink);font-weight:600}
.track-item.is-on i,.track-item.is-done i{background:var(--primary)}
body.studio-mode .nav-l{display:none}
body.studio-mode .step-track{display:flex}
body.studio-mode .nav-r .btn-primary{display:none}
body.studio-mode{overflow:hidden}

/* ---------- HERO ---------- */
.hero{
  background:
    radial-gradient(1100px 420px at 82% -12%, rgba(8,98,136,.10), transparent 62%),
    linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
}
.hero-in{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
  gap:clamp(28px,5vw,64px);align-items:stretch;
  padding:clamp(34px,4.6vw,58px) var(--pad) clamp(40px,5.6vw,68px)}
.hero-copy{display:flex;flex-direction:column;padding-top:clamp(4px,1.4vw,16px)}
.hero h1{margin:0;font-size:clamp(40px,5vw,66px);line-height:1.02;letter-spacing:-.045em;font-weight:800}
.lede{margin:20px 0 0;max-width:34ch;color:var(--ink70);font-size:clamp(15px,1.35vw,17.5px);line-height:1.68}
/* ---------- 表单卡 ---------- */
.start-card{background:#fff;border:1px solid var(--line);padding:clamp(18px,2vw,26px);
  box-shadow:0 1px 2px rgba(15,46,61,.04), 0 14px 34px -18px rgba(15,46,61,.28);
  transition:box-shadow .28s ease, transform .28s ease, border-color .28s ease}
.start-card:hover,.start-card:focus-within{border-color:#D5E2EA;
  box-shadow:0 2px 4px rgba(15,46,61,.05), 0 22px 48px -20px rgba(15,46,61,.34)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-bottom:14px;margin-bottom:18px;border-bottom:1px solid var(--line)}
.card-head .eyebrow{font-size:10px}
.card-note{font-size:10.5px;letter-spacing:.06em;color:var(--ink50)}

.frag-row{display:grid;grid-template-columns:1.4fr 1fr;gap:12px}
.big-field{display:block;margin:0 0 14px}
.big-field>span{display:flex;align-items:baseline;justify-content:space-between;gap:10px;
  font-size:10.5px;font-weight:600;letter-spacing:.1em;color:var(--ink50);margin-bottom:6px}
.big-field>span em{font-style:normal;font-weight:400;letter-spacing:.02em;color:var(--ink50);font-size:10.5px}
.big-field input,.big-field textarea{
  width:100%;display:block;border:1px solid var(--line2);background:#fff;
  border-radius:0;padding:0 12px;font-size:15px;line-height:1.4;color:var(--ink);
  outline:none;transition:border-color .15s,box-shadow .15s;
}
.big-field input{height:44px}
.big-field textarea{padding:10px 12px;min-height:78px;resize:vertical;font-size:14px;line-height:1.6}
.big-field input::placeholder,.big-field textarea::placeholder{color:#A9B3BD}
.big-field input:focus,.big-field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(8,98,136,.10)}
.big-field.need input{border-color:var(--accent2);box-shadow:0 0 0 3px rgba(180,83,58,.10)}
.summary-field{margin-bottom:16px}
.prompt-block textarea{min-height:58px}
.prompt-block>span{color:var(--ink50)}

/* 参考样本 */
.ref-block{margin:0 0 16px;padding-top:2px}
.block-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:6px}
.field-label{font-size:10.5px;font-weight:600;letter-spacing:.1em;color:var(--ink50)}
.field-opt{font-size:10px;letter-spacing:.06em;color:var(--ink50);border:1px solid var(--line);padding:1px 5px}
.ref-empty{display:flex;align-items:center;gap:10px;width:100%;height:44px;padding:0 12px;
  border:1px solid var(--line2);background:#fff;font-size:13px;color:var(--ink70);
  cursor:pointer;text-align:left;transition:background .15s,border-color .15s}
.ref-empty svg{color:var(--primary);flex:none}
.ref-empty span{flex:1}
.ref-empty i{font-style:normal;color:var(--ink50)}
.ref-empty:hover{background:var(--bg);border-color:var(--line2);color:var(--ink)}
.ref-picked{display:flex;align-items:center;gap:12px;border:1px solid var(--line);padding:8px 10px;background:var(--bg)}
.ref-picked canvas,.ref-picked img{width:34px;height:51px;flex:none;display:block;object-fit:cover;background:#fff;box-shadow:0 6px 12px -8px rgba(8,28,38,.6)}
.ref-meta{flex:1;min-width:0;display:flex;flex-direction:column;gap:1px}
.ref-meta b{font-size:12.5px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ref-meta span{font-size:10.5px;letter-spacing:.04em;color:var(--ink50)}
.ref-act{appearance:none;border:0;background:none;padding:4px 2px;font-size:11.5px;color:var(--ink70);
  cursor:pointer;text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line2)}
.ref-act:hover{color:var(--primary)}

/* 数量 / 引擎 */
.count-row{display:flex;flex-wrap:wrap;align-items:center;gap:9px 10px;
  margin:2px 0 16px;padding:14px 0 2px;border-top:1px solid var(--line);
  font-size:12px;color:var(--ink70)}
.stepper{display:inline-flex;align-items:center;border:1px solid var(--line2);height:32px}
.stepper button{width:28px;height:30px;border:0;background:#fff;font-size:15px;line-height:1;color:var(--ink70);cursor:pointer}
.stepper button:hover{background:var(--bg2);color:var(--ink)}
.stepper b{min-width:24px;text-align:center;font-size:12.5px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}
.engine-pick{display:inline-flex;align-items:center;gap:7px;margin-left:auto;font-size:11px;color:var(--ink50)}
.engine-pick select{height:32px;border:1px solid var(--line2);background:#fff;border-radius:0;
  padding:0 6px;font-size:12px;color:var(--ink);cursor:pointer}
.engine-pick em{font-style:normal;font-size:10.5px;color:var(--ink50);white-space:nowrap}

.primary-btn{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;
  height:46px;padding:0 18px;border:1px solid var(--primary);background:var(--primary);
  color:#fff;font-size:13.5px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:background .15s,border-color .15s,opacity .15s}
.primary-btn i{font-style:normal;font-size:15px}
.primary-btn:hover{background:var(--on-bg-hover);border-color:var(--on-bg-hover)}
.primary-btn:disabled{opacity:.6;cursor:progress}
.form-note{margin:10px 0 0;text-align:center;font-size:10.5px;letter-spacing:.04em;color:var(--ink50)}

/* ---------- 样例库 ---------- */
.demos{padding:clamp(40px,5.4vw,64px) 0 clamp(48px,6vw,72px)}
.sec-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.6fr);gap:24px;align-items:end;margin-bottom:22px}
.sec-head h2{margin:6px 0 0;font-size:clamp(26px,3.2vw,38px);line-height:1.1;letter-spacing:-.03em;font-weight:800}
.sec-head > p{margin:0;color:var(--ink70);font-size:13.5px;line-height:1.65;max-width:42ch;justify-self:end}

.wall-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin:0 0 22px;padding-bottom:15px;border-bottom:1px solid var(--line)}
.wall-filter{position:relative}
.wall-filter summary{display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 11px;
  border:1px solid var(--line2);font-size:12px;color:var(--ink70);cursor:pointer;list-style:none;user-select:none}
.wall-filter summary::-webkit-details-marker{display:none}
.wall-filter summary span{font-size:10px;letter-spacing:.1em;color:var(--ink50)}
.wall-filter summary b{font-weight:600;color:var(--ink)}
.wall-filter summary i{width:0;height:0;border-left:3px solid transparent;border-right:3px solid transparent;border-top:4px solid var(--ink50);margin-left:2px;transition:transform .15s}
.wall-filter[open] summary i{transform:rotate(180deg)}
.wall-filter summary:hover{background:var(--bg2)}
.demo-filters{position:absolute;left:0;top:36px;z-index:12;min-width:168px;
  background:#fff;border:1px solid var(--line2);padding:5px;
  box-shadow:0 24px 40px -28px rgba(8,28,38,.5)}
.demo-filters button{display:block;width:100%;height:30px;padding:0 9px;border:0;background:none;
  font-size:12px;color:var(--ink70);text-align:left;cursor:pointer;white-space:nowrap}
.demo-filters button:hover{background:var(--bg2);color:var(--ink)}
.demo-filters button.is-on{background:var(--on-bg);color:var(--on-fg)}
.wall-count{font-size:10.5px;letter-spacing:.1em;color:var(--ink50)}

.demo-wall{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:30px 16px}
.demo-card{display:flex;flex-direction:column;gap:10px;margin:0;padding:0;background:none;border:0;text-align:left}
.demo-card.is-hide{display:none}
.demo-card .shot{position:relative;width:100%;aspect-ratio:2/3;background:var(--bg2);overflow:hidden;
  box-shadow:0 22px 34px -26px rgba(8,28,38,.55);transition:transform .25s ease,box-shadow .25s ease}
.demo-card .shot img,.demo-card .shot canvas{display:block;width:100%;height:100%;object-fit:cover;
  transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.demo-card:hover .shot,.demo-card:focus-visible .shot{transform:translateY(-4px);box-shadow:0 28px 40px -26px rgba(8,28,38,.6)}
.demo-card:hover .shot img,.demo-card:hover .shot canvas{transform:scale(1.025)}
.demo-card .badge{position:absolute;top:9px;right:9px;z-index:2;padding:4px 7px;
  background:rgba(9,31,42,.84);color:#fff;font-size:8.5px;font-weight:700;letter-spacing:.16em}
.demo-card .peek{position:absolute;left:9px;bottom:9px;padding:5px 8px;background:rgba(10,34,46,.82);
  color:#fff;font-size:9.5px;font-weight:600;letter-spacing:.1em;opacity:0;transform:translateY(4px);transition:.2s}
.demo-card:hover .peek,.demo-card:focus-visible .peek{opacity:1;transform:none}
.demo-card .meta{display:flex;flex-direction:column;gap:2px}
.demo-card .tagline{display:flex;align-items:center;gap:6px;font-size:9.5px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--primary)}
.demo-card .tagline i{display:block;width:13px;height:1px;background:var(--primary)}
.demo-card .meta b{font-size:13px;font-weight:600;letter-spacing:-.01em;line-height:1.35;color:var(--ink)}
.demo-card .meta span{font-size:11px;line-height:1.4;color:var(--ink50)}

/* ---------- 样例浮层：首页就地打开，不跳页 ---------- */
.cover-modal{width:min(1040px,calc(100vw - 32px));max-height:calc(100vh - 40px);padding:0;border:0;
  background:#fff;color:var(--ink);box-shadow:0 50px 100px -40px rgba(4,18,26,.6);overflow:hidden}
.cover-modal[open]{display:block}
.cover-modal::backdrop{background:rgba(6,22,30,.58);backdrop-filter:blur(3px)}
.modal-body{display:grid;grid-template-columns:380px minmax(0,1fr);max-height:calc(100vh - 40px)}
.modal-cover{margin:0;background:var(--bg2)}
.modal-cover img{width:100%;height:100%;object-fit:cover}
.modal-info{padding:30px 32px 26px;overflow:auto}
.modal-x{position:absolute;right:10px;top:10px;z-index:3;width:36px;height:36px;border:0;
  background:rgba(255,255,255,.9);font-size:20px;line-height:1;cursor:pointer;color:var(--ink)}
.modal-x:hover{background:var(--on-bg);color:var(--on-fg)}
.modal-kicker{margin:0 0 8px;font-size:10px;letter-spacing:.16em;font-weight:700;color:var(--primary);text-transform:uppercase}
.modal-info h2{margin:0;font-size:26px;line-height:1.16;letter-spacing:-.03em}
.modal-by{margin:6px 0 0;font-size:12.5px;color:var(--ink50)}
.modal-zh{margin:12px 0 0;font-size:12.5px;line-height:1.65;color:var(--ink70)}
.prompt-box{margin-top:20px;border:1px solid var(--line);background:var(--bg2)}
.prompt-box header{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 12px;
  border-bottom:1px solid var(--line);font-size:10px;letter-spacing:.12em;font-weight:700;color:var(--ink70);text-transform:uppercase}
.prompt-box pre{margin:0;padding:14px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11.5px;
  line-height:1.65;white-space:pre-wrap;max-height:300px;overflow:auto;color:#33404C}
.copy-btn{border:1px solid var(--line2);background:#fff;height:26px;padding:0 10px;font-size:10.5px;
  letter-spacing:.04em;font-weight:600;cursor:pointer;text-transform:none}
.copy-btn:hover{background:var(--on-bg);color:var(--on-fg);border-color:var(--on-bg)}
.copy-btn.is-done{background:var(--primary);border-color:var(--primary);color:#fff}
.sample-pipeline{margin:10px 0 0;font-size:11px;line-height:1.6;color:var(--ink50)}
.modal-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.modal-actions .btn{height:40px;font-size:12.5px}
@media(max-width:860px){
  .modal-body{grid-template-columns:1fr;overflow:auto}
  .modal-cover{max-height:40vh}
  .modal-cover img{height:40vh}
  .modal-info{padding:22px 20px 22px;overflow:visible}
}

/* ---------- 页脚（内容在 shell.css，这里只补首页里的排布） ---------- */
footer.site-foot{padding:26px 0 34px}
footer.site-foot .in{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}

/* ---------- 工作台 ---------- */
.studio{height:calc(100dvh - 68px);display:flex;flex-direction:column;min-height:0;background:var(--bg)}
.studio-top{height:56px;flex:none;display:flex;align-items:center;gap:14px;
  padding:0 clamp(16px,2.6vw,28px);background:#fff;border-bottom:1px solid var(--line)}
.back-btn{appearance:none;border:0;background:none;padding:6px 0;font-size:12.5px;color:var(--ink70);cursor:pointer}
.back-btn:hover{color:var(--ink);text-decoration:underline;text-underline-offset:4px}
.studio-title{display:flex;align-items:baseline;gap:10px;min-width:0}
.studio-step{font-size:10px;font-weight:700;letter-spacing:.16em;color:var(--primary);
  text-transform:uppercase;white-space:nowrap}
.studio-title strong{font-size:16px;font-weight:700;letter-spacing:-.01em;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.studio-save{margin-left:auto;font-size:10.5px;letter-spacing:.06em;color:var(--ink50)}

.studio-grid{flex:1;min-height:0;display:grid;grid-template-columns:minmax(0,1fr) 452px}
.preview-pane{min-width:0;min-height:0;display:flex;flex-direction:column;
  background:var(--bg2);border-right:1px solid var(--line)}
.preview-bar{height:54px;flex:none;display:flex;align-items:center;justify-content:space-between;
  gap:14px;padding:0 clamp(16px,2.6vw,26px);background:#fff;border-bottom:1px solid var(--line)}
.view-switch{display:flex;border:1px solid var(--line2)}
.view-btn{appearance:none;height:32px;padding:0 13px;border:0;border-left:1px solid var(--line);
  background:#fff;font-size:12px;font-weight:600;color:var(--ink70);cursor:pointer;transition:.15s}
.view-btn:first-child{border-left:0}
.view-btn:hover{background:var(--bg2);color:var(--ink)}
.view-btn.is-on{background:var(--on-bg);color:var(--on-fg)}
.read-badge{display:inline-flex;align-items:center;gap:7px;font-size:11px;color:var(--ink70)}
.read-badge i{width:20px;height:20px;display:grid;place-items:center;background:var(--bg2);
  font-style:normal;font-size:10px;font-weight:700;color:var(--ink70)}
.read-badge.grade-A i{background:var(--green);color:#fff}
.read-badge.grade-B i{background:#8A8534;color:#fff}
.read-badge.grade-C i{background:#C07A1E;color:#fff}
.read-badge.grade-D i{background:var(--accent2);color:#fff}

.canvas-shell{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;
  padding:26px clamp(16px,3vw,38px);overflow:hidden}
#canvas{display:block;width:auto;height:auto;max-width:100%;max-height:100%;background:#fff;
  box-shadow:0 28px 44px -30px rgba(8,28,38,.55);cursor:default;touch-action:none}
#canvas.dragging{cursor:grabbing}
.thumb-shell{flex:1;min-height:0;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:14px;padding:20px}
#thumb{width:160px;height:auto;background:#fff;box-shadow:0 22px 34px -26px rgba(8,28,38,.55)}
.thumb-shell p{font-size:10.5px;letter-spacing:.06em;color:var(--ink50)}
.preview-meta{flex:none;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 clamp(16px,2.6vw,26px) 12px;font-size:11px;color:var(--ink50)}
.preview-meta span{font-variant-numeric:tabular-nums}
.preview-hint{letter-spacing:.04em}
.stage-foot{height:34px;flex:none;display:flex;align-items:center;justify-content:center;
  padding:0 18px;border-top:1px solid var(--line);background:#fff;
  font-size:10.5px;letter-spacing:.04em;color:var(--ink50);text-align:center}

.studio-panel{min-width:0;min-height:0;display:flex;flex-direction:column;background:#fff;
  border-left:1px solid var(--line)}
.panel-scroll{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;
  padding:26px clamp(18px,2.2vw,26px) 20px;scrollbar-width:thin}
.panel-scroll::-webkit-scrollbar{width:8px}
.panel-scroll::-webkit-scrollbar-thumb{background:rgba(15,46,61,.18)}
.panel-view h2{font-size:clamp(21px,2vw,25px);line-height:1.16;letter-spacing:-.03em;font-weight:800}
.panel-lede{margin:10px 0 20px;font-size:12.5px;line-height:1.65;color:var(--ink70);max-width:40ch}

.font-pick{margin:0 0 18px}
.font-pick-label{display:block;font-size:10px;font-weight:700;letter-spacing:.14em;
  color:var(--ink50);margin-bottom:8px}
.font-chips{display:flex;flex-wrap:wrap;gap:6px}
.font-chip{display:flex;flex-direction:column;align-items:center;gap:1px;min-width:50px;
  padding:6px 7px;border:1px solid var(--line2);background:#fff;cursor:pointer;transition:.15s}
.font-chip i{font-size:16px;line-height:1.1}
.font-chip em{font-size:9px;letter-spacing:.04em;color:var(--ink50)}
.font-chip:hover{background:var(--bg2)}
.font-chip.is-on{background:var(--on-bg);border-color:var(--on-bg);color:var(--on-fg)}
.font-chip.is-on em{color:rgba(255,255,255,.62)}

.style-list{display:grid;gap:7px;margin:0 0 16px}
.style-card{appearance:none;width:100%;display:flex;align-items:center;gap:12px;padding:8px;
  border:1px solid var(--line);background:#fff;text-align:left;cursor:pointer;transition:.15s}
.style-card:hover{background:var(--bg);border-color:var(--line2)}
.style-card canvas{width:44px;height:66px;flex:none;display:block;background:var(--bg2)}
.style-copy{flex:1;min-width:0}
.style-copy b{display:block;font-size:13px;font-weight:600;letter-spacing:-.01em}
.style-copy em{display:block;font-size:10.5px;color:var(--ink50);margin-top:1px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.style-dots{display:flex;gap:3px;margin-top:6px}
.style-dots i{width:8px;height:8px;display:block;box-shadow:inset 0 0 0 1px rgba(0,0,0,.1)}
.style-check{width:18px;height:18px;flex:none;display:grid;place-items:center;
  border:1px solid var(--line2);font-size:9px;color:transparent}
.style-card.is-on{border-color:var(--primary);box-shadow:inset 0 0 0 1px var(--primary)}
.style-card.is-on .style-check{background:var(--primary);border-color:var(--primary);color:#fff}
.style-card.is-on .style-copy em{color:var(--ink70)}
@keyframes cnWait{0%,100%{opacity:.42}50%{opacity:.85}}
.style-card.is-wait canvas{animation:cnWait 1.6s ease-in-out infinite}
.style-card.is-ai-fail canvas{opacity:.7}

.art-actions{display:flex;gap:8px;margin:0 0 2px}
.upload-btn,.preset-btn{flex:1;height:38px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line2);background:#fff;font-size:12px;font-weight:600;color:var(--ink);
  cursor:pointer;text-align:center;transition:.15s}
.upload-btn:hover,.preset-btn:hover{background:var(--bg2)}
.preset-btn:disabled{opacity:.6;cursor:progress}

.advanced{border-top:1px solid var(--line);margin-top:14px}
.advanced summary{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:13px 0;font-size:12.5px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none}
.advanced summary::-webkit-details-marker{display:none}
.advanced summary em{font-style:normal;font-size:10.5px;font-weight:400;letter-spacing:.04em;color:var(--ink50)}
.advanced summary:hover{color:var(--primary)}
.advanced-body{display:flex;flex-direction:column;gap:10px;padding:2px 0 4px}

.adv-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.field{display:block;min-width:0}
.field>span{display:flex;align-items:baseline;justify-content:space-between;gap:8px;
  font-size:10px;letter-spacing:.08em;color:var(--ink50);margin-bottom:5px}
.field .val{font-style:normal;color:var(--ink);font-variant-numeric:tabular-nums}
.field select,.field input[type="text"],.field textarea{
  width:100%;display:block;border:1px solid var(--line2);background:#fff;border-radius:0;
  height:34px;padding:0 8px;font-size:12px;color:var(--ink);outline:none;transition:.15s}
.field textarea{height:auto;min-height:52px;padding:7px 8px;line-height:1.5;resize:vertical}
.field select{cursor:pointer}
.field select:focus,.field input:focus,.field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(8,98,136,.12)}
.field input[type="range"]{width:100%;margin:5px 0;accent-color:var(--primary)}
.swatch-row{display:flex;align-items:center;gap:8px}
.swatch-row input[type="color"]{width:34px;height:30px;flex:none;border:1px solid var(--line2);
  background:#fff;padding:2px;cursor:pointer}
.swatches{display:flex;flex-wrap:wrap;gap:5px}
.swatches button{width:20px;height:20px;border:1px solid var(--line2);background:#fff;cursor:pointer}
.swatches button:hover{outline:2px solid var(--primary);outline-offset:1px}
.adv-tools{display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:2px}
.check{display:inline-flex;align-items:center;gap:6px;font-size:11px;color:var(--ink70);cursor:pointer}
.check input{accent-color:var(--primary)}
.mini-btn{height:28px;padding:0 9px;border:1px solid var(--line2);background:#fff;
  font-size:10.5px;font-weight:600;color:var(--ink);cursor:pointer}
.mini-btn:hover{background:var(--bg2)}

.layers-head{display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:6px;font-size:10px;font-weight:700;letter-spacing:.12em;color:var(--ink50)}
.layers{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.layers li{display:flex;align-items:center;gap:8px;padding:7px 3px;border-bottom:1px solid var(--line);
  font-size:11.5px;color:var(--ink70);cursor:pointer}
.layers li:hover{background:var(--bg)}
.layers li .glyph{width:16px;height:16px;flex:none;display:grid;place-items:center;
  background:var(--bg2);font-size:7.5px;letter-spacing:.02em;color:var(--ink50)}
.layers li .nm{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.layers li.is-on{background:var(--bg2);color:var(--ink);font-weight:600}
.layers .eye{border:0;background:none;padding:0 2px;font-size:9px;line-height:1;color:var(--ink50);cursor:pointer}
.layers .eye.off{color:#C2CAD1}

.inspector-wrap{margin-top:2px}
.insp-head{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 0 8px;border-bottom:1px solid var(--line);margin-bottom:10px}
.insp-head b{font-size:12px;font-weight:600}
.insp-head .badge{font-size:8.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink50);
  background:var(--bg2);padding:2px 5px}
.insp-body{display:flex;flex-direction:column;gap:9px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.seg{display:flex;border:1px solid var(--line2)}
.seg button{flex:1;height:30px;border:0;border-left:1px solid var(--line);background:#fff;
  font-size:11px;color:var(--ink70);cursor:pointer}
.seg button:first-child{border-left:0}
.seg button.is-on{background:var(--on-bg);color:var(--on-fg)}
.danger{height:32px;border:1px solid rgba(180,83,58,.45);background:#fff;color:var(--accent2);
  font-size:11px;font-weight:600;cursor:pointer}
.danger:hover{background:#FBF3F0}
.insp-body .upload{display:block}
.insp-body .upload span{display:flex;align-items:center;justify-content:center;height:32px;
  border:1px solid var(--line2);font-size:11px;font-weight:600;cursor:pointer}
.insp-body .upload span:hover{background:var(--bg2)}
.insp-empty{border:1px solid var(--line);background:var(--bg);padding:12px;
  font-size:11px;line-height:1.65;color:var(--ink70)}
.insp-empty b{display:block;color:var(--ink);font-size:11.5px;margin-bottom:2px}

.panel-cta{flex:none;padding:14px clamp(18px,2.2vw,26px) 16px;border-top:1px solid var(--line);background:#fff}
.panel-cta p{margin:8px 0 0;text-align:center;font-size:10.5px;color:var(--ink50)}

/* 导出面板 */
.ready-card{display:flex;align-items:center;gap:11px;border:1px solid var(--line);
  background:var(--bg);padding:12px 13px;margin-bottom:14px}
.ready-icon{width:26px;height:26px;flex:none;display:grid;place-items:center;
  background:var(--green);color:#fff;font-size:12px;font-weight:700}
.ready-card.is-warn .ready-icon{background:var(--accent2)}
.ready-card b{display:block;font-size:12px;font-weight:600}
.ready-card span{display:block;font-size:10.5px;line-height:1.5;color:var(--ink50);margin-top:1px}
.legibility{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.legibility .grade{width:34px;height:34px;flex:none;display:grid;place-items:center;
  color:#fff;font-size:14px;font-weight:800}
.legibility b{display:block;font-size:11.5px;font-weight:600}
.legibility span{display:block;font-size:10.5px;line-height:1.5;color:var(--ink50);margin-top:1px}
.dpi-card{display:flex;align-items:center;justify-content:space-between;gap:10px;
  border:1px solid var(--line);padding:10px 12px;margin-bottom:12px}
.dpi-card b{display:block;font-size:11.5px;font-weight:600;font-variant-numeric:tabular-nums}
.dpi-card span{display:block;font-size:10.5px;color:var(--ink50);margin-top:1px}
.dpi-card.is-ok{border-color:rgba(46,139,87,.35);background:#F5FAF7}
.dpi-btn{height:28px;padding:0 9px;border:1px solid var(--line2);background:#fff;
  font-size:10.5px;font-weight:600;cursor:pointer;white-space:nowrap}
.warn{border-left:2px solid var(--accent2);background:#FBF3F0;padding:9px 11px;margin-bottom:12px}
.warn p{margin:0 0 5px;font-size:10.5px;line-height:1.6;color:#8A4232}
.warn p:last-child{margin-bottom:0}
.spec{display:grid;grid-template-columns:1fr 1fr;gap:9px 12px;margin:14px 0 18px;
  padding-top:14px;border-top:1px solid var(--line)}
.spec b{display:block;font-size:9px;font-weight:600;letter-spacing:.09em;color:var(--ink50)}
.spec span{display:block;font-size:12px;font-weight:600;font-variant-numeric:tabular-nums;margin-top:1px}
.spec .hi{color:var(--primary)}
.file-note{margin:8px 0 0;text-align:center;font-size:10px;color:var(--ink50)}
.other-formats{margin-top:16px;padding-top:12px;border-top:1px solid var(--line)}
.other-formats summary{display:flex;align-items:center;justify-content:space-between;
  font-size:11.5px;font-weight:600;cursor:pointer;list-style:none}
.other-formats summary::-webkit-details-marker{display:none}
.format-list{display:grid;gap:6px;margin-top:9px}
.format-list button{display:flex;align-items:center;justify-content:space-between;gap:10px;
  height:42px;padding:0 11px;border:1px solid var(--line);background:#fff;text-align:left;cursor:pointer}
.format-list button:hover{background:var(--bg)}
.format-list button b{display:block;font-size:11.5px;font-weight:600}
.format-list button em{display:block;font-style:normal;font-size:10px;color:var(--ink50);margin-top:1px}
.format-list button i{font-style:normal;color:var(--ink50)}
.small-print{margin:14px 0 0;font-size:10px;line-height:1.65;color:var(--ink50)}
.back-link{border:0;background:none;padding:14px 0 0;font-size:11px;color:var(--ink70);
  cursor:pointer;text-decoration:underline;text-underline-offset:3px}
.back-link:hover{color:var(--ink)}

/* ---------- 样本库弹层 ---------- */
.lib-backdrop{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:20px;
  background:rgba(6,22,30,.58);backdrop-filter:blur(3px)}
.lib{width:min(1000px,100%);max-height:calc(100vh - 40px);background:#fff;
  display:flex;flex-direction:column;box-shadow:0 50px 100px -40px rgba(4,18,26,.6)}
.lib-head{flex:none;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:15px 20px;border-bottom:1px solid var(--line)}
.lib-head b{font-size:13.5px;font-weight:700}
.lib-close{width:32px;height:32px;border:0;background:var(--bg2);font-size:18px;line-height:1;
  color:var(--ink);cursor:pointer}
.lib-close:hover{background:var(--on-bg);color:var(--on-fg)}
.lib-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px 12px;
  padding:18px 20px;overflow:auto}
.lib-item{display:flex;flex-direction:column;gap:5px;padding:0;border:0;background:none;
  text-align:left;cursor:pointer}
.lib-item img{width:100%;height:auto;aspect-ratio:2/3;object-fit:cover;display:block;background:var(--bg2);transition:.15s}
.lib-item:hover img{outline:1px solid var(--line2);outline-offset:2px}
.lib-item.is-on img{outline:2px solid var(--primary);outline-offset:2px}
.lib-cap{font-size:10.5px;color:var(--ink70);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lib-item.is-on .lib-cap{color:var(--ink);font-weight:600}
.lib-note{margin:0;padding:0 20px 16px;font-size:10.5px;color:var(--ink50)}

/* ---------- toast / 其它 ---------- */
.toast{position:fixed;left:50%;bottom:28px;z-index:90;max-width:calc(100vw - 32px);
  transform:translate(-50%,10px);background:var(--ink);color:#fff;
  padding:10px 16px;font-size:12.5px;opacity:0;pointer-events:none;transition:.24s}
.toast.is-on{opacity:1;transform:translate(-50%,0)}
.m3-ripple{display:none}
.hidden-legacy{display:none}
::selection{background:var(--primary);color:#fff}

/* ---------- 窄屏 ---------- */
@media(max-width:1180px){
  .studio-grid{grid-template-columns:minmax(0,1fr) 400px}
  .demo-wall{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@media(max-width:1000px){
  .hero-in{grid-template-columns:1fr;gap:28px}
  .hero-copy{padding-top:0}
  .demo-wall{grid-template-columns:repeat(3,minmax(0,1fr))}
  .sec-head{grid-template-columns:1fr;align-items:start;gap:10px}
  .sec-head p{justify-self:start;max-width:52ch}
  body.studio-mode{overflow:auto}
  .studio{height:auto;min-height:calc(100dvh - 68px)}
  .studio-grid{grid-template-columns:1fr}
  .preview-pane{height:52svh;min-height:340px;border-right:0;border-bottom:1px solid var(--line)}
  .studio-panel{border-left:0}
  .panel-scroll{overflow:visible}
}
@media(max-width:680px){
  .hero h1{font-size:clamp(34px,9.4vw,46px)}
  .frag-row{grid-template-columns:1fr}
  .engine-pick{margin-left:0;flex:1 0 100%}
  .demo-wall{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 13px}
  .demo-card .meta b{font-size:12px}
  .wall-count{display:none}
  .lib-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;padding:14px}
  .studio-top{height:auto;flex-wrap:wrap;padding:9px 16px;gap:6px 12px}
  .studio-title{order:3;width:100%}
  .studio-save{margin-left:0}
  .preview-bar{padding:0 16px}
  .stage-foot{font-size:10px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}


/* ---------- Prompt + 出图引擎（常显，不折叠） ---------- */
.gen-adv{margin:0 0 10px}
.gen-adv>summary{display:flex;align-items:center;gap:8px;cursor:pointer;list-style:none;
  padding:7px 0;font-size:11.5px;color:var(--ink70);letter-spacing:.02em;user-select:none}
.gen-adv>summary::-webkit-details-marker{display:none}
.gen-adv>summary:hover{color:var(--ink)}
.gen-adv>summary em{font-style:normal;font-size:10.5px;color:var(--ink50)}
.gen-adv>summary i{margin-left:auto;width:7px;height:7px;margin-right:2px;
  border-right:1px solid var(--ink50);border-bottom:1px solid var(--ink50);
  transform:rotate(45deg);transition:transform .2s ease}
.gen-adv[open]>summary i{transform:rotate(-135deg)}
.gen-adv[open]>summary{padding-bottom:4px}
.gen-adv .adv-body{padding:2px 0 4px}
.gen-adv .engine-pick{display:flex;align-items:center;gap:9px;margin:0;padding:0;
  justify-content:flex-start;font-size:11px;color:var(--ink50)}
.gen-adv .engine-pick select{flex:none}
.gen-adv .engine-pick em{flex:1;min-width:0;text-align:left}
#creditChip b{font-weight:700}
#creditChip[hidden]{display:none!important}

/* ---------- 导出主按钮 ---------- */
.primary-btn.download-main{margin-top:2px}
.deliverables{list-style:none;margin:0;padding:0;display:none}

/* ---------- 登录 / 账户弹层 ---------- */
.auth-backdrop{position:fixed;inset:0;z-index:300;display:grid;place-items:center;padding:20px;
  background:rgba(6,22,30,.58);backdrop-filter:blur(3px)}
.auth{position:relative;width:min(400px,100%);background:#fff;padding:28px 26px 20px;
  box-shadow:0 50px 100px -40px rgba(4,18,26,.6)}
.auth h2{margin:0;font-size:22px;font-weight:800;letter-spacing:-.03em;line-height:1.2}
.auth-lede{margin:8px 0 20px;font-size:12.5px;line-height:1.6;color:var(--ink70)}
.auth-field{display:block;margin:0 0 12px}
.auth-field span{display:block;margin-bottom:6px;font-size:10px;font-weight:600;
  letter-spacing:.1em;color:var(--ink50)}
.auth-field input{width:100%;height:40px;padding:0 11px;border:1px solid var(--line2);
  background:#fff;border-radius:0;font-size:13.5px;color:var(--ink);outline:none;transition:.15s}
.auth-field input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(8,98,136,.10)}
.auth-err{margin:0 0 10px;font-size:11.5px;color:var(--accent2)}
.auth-submit{width:100%;height:42px;margin-top:6px;border:1px solid var(--primary);
  background:var(--primary);color:#fff;font-size:13px;font-weight:600;letter-spacing:.02em;cursor:pointer;transition:.15s}
.auth-submit:hover{background:var(--on-bg-hover);border-color:var(--on-bg-hover)}
.auth-submit[disabled]{opacity:.6;cursor:default}
.auth-alt{display:flex;align-items:center;justify-content:center;width:100%;height:38px;margin-top:6px;
  border:0;background:none;color:var(--primary);font-size:12px;font-weight:600;cursor:pointer;text-align:center}
.auth-alt:hover{background:var(--bg2)}
.auth .auth-close{position:absolute;top:10px;right:10px;z-index:2;width:30px;height:30px;border:0;
  background:none;color:var(--ink50);font-size:18px;line-height:1;cursor:pointer}
.auth-close:hover{background:var(--bg2);color:var(--ink)}
.auth-account{text-align:center}
.auth-account b{display:block;font-size:13.5px;font-weight:600;color:var(--ink);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.auth-account span{display:block;margin:4px 0 12px;font-size:12px;color:var(--ink70);font-variant-numeric:tabular-nums}

/* Google 登录：自绘按钮（官方 iframe 的字体/圆角跟站点对不上），下面一条「或」分开两种登录 */
.auth-google{margin:0 0 4px}
.auth-gbtn{display:flex;align-items:center;justify-content:center;gap:9px;width:100%;height:42px;
  border:1px solid var(--line2);background:#fff;color:var(--ink);font-family:inherit;
  font-size:13px;font-weight:500;cursor:pointer;transition:.15s}
.auth-gbtn:hover{border-color:var(--ink);background:#fff}
.auth-gbtn[disabled]{opacity:.55;cursor:default}
.auth-gbtn svg{flex:none}
.auth-or{display:flex;align-items:center;gap:10px;margin:16px 0 14px;color:var(--ink50);font-size:10px;letter-spacing:.1em}
.auth-or::before,.auth-or::after{content:"";flex:1;height:1px;background:var(--line)}

/* 样例库下方的一行说明 */
.form-note.wall-note{margin-top:24px;text-align:left;letter-spacing:0;font-size:11.5px}
.form-note.wall-note a{margin-left:.4em}

.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;
  clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

/* ---------- 2026-10-23 · 表单卡收紧：一屏之内能看到下面的样例库 ---------- */
.hero-in{padding-bottom:clamp(30px,3.6vw,50px)}
.start-card{padding:18px 20px 16px}
.start-card .card-head{padding-bottom:10px;margin-bottom:12px}
.start-card .big-field{margin-bottom:10px}
.start-card .big-field input{height:40px;font-size:14px}
.start-card .big-field textarea{min-height:56px;padding:8px 11px;font-size:13.5px}
.start-card .prompt-block textarea{min-height:56px}
.start-card .ref-block{margin-bottom:10px}
.start-card .ref-empty{height:40px}
.start-card .form-note{margin-top:9px;font-size:9.5px}
.gen-row{display:flex;align-items:center;gap:10px;margin:4px 0 0;padding:12px 0 0;
  border-top:1px solid var(--line)}
.gen-row .primary-btn{margin-left:auto;min-width:180px;justify-content:center}
@media (max-width:640px){
  .gen-row{flex-wrap:wrap;gap:10px}
  .gen-row .primary-btn{width:100%;margin:6px 0 0;min-width:0}
}
.gen-row .count-row{flex:none;margin:0;padding:0;border:0;gap:8px;font-size:11px;white-space:nowrap}
.gen-row .stepper{height:38px}
.gen-row .stepper button{height:36px;width:26px}
.gen-row .row-label{font-size:11px;color:var(--ink50);white-space:nowrap;letter-spacing:.02em}
.gen-row .trim-pick{height:38px;border:1px solid var(--line2);background:#fff;border-radius:0;
  font-size:11.5px;color:var(--ink);padding:0 5px;flex:none;font-variant-numeric:tabular-nums}
.gen-row .trim-pick:focus{outline:none;border-color:var(--primary)}
.gen-row .primary-btn{flex:1;width:auto;min-width:0;height:38px;padding:0 14px;font-size:12.5px}
.gen-row .primary-btn span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cost-note{margin:8px 0 0;font-size:11px;color:var(--ink50);letter-spacing:.02em}
.cost-note .cost-num{font-weight:700;font-size:12.5px;color:var(--primary);font-variant-numeric:tabular-nums;margin:0 1px}
.cost-note b{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
@media(max-width:430px){.count-label{display:none}}

/* 表单进一步收紧 */
.hero-in{padding-top:clamp(26px,3.2vw,42px);padding-bottom:clamp(24px,3vw,38px)}
.start-card .big-field{margin-bottom:8px}
.gen-adv .prompt-field{margin:0 0 4px}
.gen-adv .prompt-field>span{font-size:10px}
.gen-adv .prompt-field textarea{min-height:48px;font-size:12.5px}
.gen-adv .engine-pick{padding-top:2px}

.demos{padding-top:clamp(30px,3.4vw,44px)}

/* 2026-10-23 · 移动端把提交按钮单独占一行，别和 stepper 挤 */
@media (max-width:640px){
  .gen-row{flex-wrap:wrap}
  .gen-row .primary-btn{flex:0 0 100%;width:100%;min-width:0;margin:8px 0 0;height:42px}
}

/* ---------- 2026-10-23 · 输入框降噪：细一点、矮一点、边框退后 ----------
   原先是 1px 深描边 + 44px 高 + 15px 字，卡片里三个框摞起来像表格。
   现在：边框降到 --line2 的一半、填充改极浅底色、高度降 4px、字重降一档。
   仍然是直角、仍然 1px，不引入圆角药丸（这是站点的版式底线）。 */
.start-card{--fld-line:rgba(15,46,61,.13);--fld-line-hi:rgba(8,98,136,.45)}
.start-card .big-field>span{font-size:10px;letter-spacing:.08em;margin-bottom:5px;font-weight:500}
.start-card .big-field input,
.start-card .big-field textarea{
  border:1px solid var(--fld-line);
  background:#FCFDFD;
  font-size:13.5px;
  color:#22303B;
  transition:border-color .18s,background .18s,box-shadow .18s;
}
.start-card .big-field input{height:38px;padding:0 11px}
.start-card .big-field textarea{padding:8px 11px}
.start-card .big-field input:hover,
.start-card .big-field textarea:hover{border-color:rgba(15,46,61,.22);background:#fff}
.start-card .big-field input:focus,
.start-card .big-field textarea:focus{
  border-color:var(--fld-line-hi);
  background:#fff;
  box-shadow:0 0 0 2px rgba(8,98,136,.07);
}
.start-card .big-field input::placeholder,
.start-card .big-field textarea::placeholder{color:#B4BEC7}

/* 底部那一行控件也一起收：stepper / 开本 / 提交 */
.gen-row{gap:8px;padding-top:11px;margin-top:2px}
.gen-row .stepper{height:32px;border-color:var(--fld-line, rgba(15,46,61,.13))}
.gen-row .stepper button{height:30px;width:24px;font-size:13px;color:#8A97A2}
.gen-row .stepper button:hover{background:#F4F7F9;color:var(--ink)}
/* 底部一行里凡是「数字」都用同一套：12px / 500 / tabular-nums。
   以前 stepper 是 12px 600、开本下拉是 11px 400，并排看着像两种字体。 */
.gen-row .stepper b{min-width:22px;font-size:12px;font-weight:500;letter-spacing:0}
.gen-row .trim-pick{height:32px;border-color:var(--fld-line, rgba(15,46,61,.13));background:#FCFDFD;
  font-size:12px;font-weight:500;letter-spacing:0}
.gen-row .primary-btn{height:32px;font-size:12px;padding:0 12px}
.gen-row .row-label{font-size:10.5px}