:root{
  /* 日式小清新：米白、抹茶、灰粉 */
  --bg: #f7f4ef;
  --bg2: #faf7f2;
  --panel: #fffcf8;
  --panel2: #fff9f4;
  --text: #3a3632;
  --muted: #7d756c;
  --line: rgba(58, 54, 50, 0.1);
  --shadow: 0 12px 40px rgba(58, 54, 50, 0.08);
  --shadow-soft: 0 4px 20px rgba(90, 120, 100, 0.06);
  --accent: #7eb8a8;
  --accent-deep: #5a9a88;
  --accent2: #e8b4b8;
  --accent2-soft: rgba(232, 180, 184, 0.35);
  --sakura: #f5e0e6;
  --mint: #e5f2ec;
  --danger: #d97b8c;
  --radius: 16px;
  --radius2: 22px;
  --max: 1080px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  --sans: "Noto Sans SC", ui-sans-serif, system-ui, -apple-system, "PingFang SC","Microsoft YaHei", Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: var(--sans);
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 900px 480px at 8% -10%, rgba(232, 180, 184, 0.22), transparent 55%),
    radial-gradient(ellipse 700px 400px at 92% 8%, rgba(126, 184, 168, 0.18), transparent 50%),
    radial-gradient(ellipse 600px 360px at 50% 100%, rgba(245, 224, 230, 0.35), transparent 55%);
  background-attachment: fixed;
  line-height: 1.65;
  letter-spacing: 0.02em;
}

.container{
  max-width: var(--max);
  margin:0 auto;
  padding: 0 18px;
}

.skip{
  position:absolute;
  left:-999px;
  top:auto;
  width:1px;height:1px;
  overflow:hidden;
}
.skip:focus{
  left:18px; top:12px;
  width:auto; height:auto;
  padding:10px 12px;
  background: var(--panel2);
  border:1px solid var(--line);
  border-radius: 10px;
  z-index: 1000;
}

.header{
  position: sticky;
  top:0;
  z-index: 50;
  backdrop-filter: blur(12px) saturate(1.1);
  background: color-mix(in oklab, var(--bg2) 88%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--line) 80%, var(--accent2) 20%);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6) inset;
}
.header__inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap: 12px;
  min-width: 200px;
}
.brand__mark{
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background:
    linear-gradient(145deg, color-mix(in oklab, var(--accent) 85%, white), color-mix(in oklab, var(--accent2) 70%, white));
  box-shadow: var(--shadow-soft), 0 0 0 3px rgba(255, 252, 248, 0.9) inset;
}
.brand__name{
  font-weight: 600;
  letter-spacing: 0.12em;
  font-size: 1.05rem;
}
.brand__tagline{
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.nav{
  display:flex;
  align-items:center;
  gap: 10px;
}
.nav__toggle{
  display:none;
  border:1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor:pointer;
}
.nav__links{
  display:flex;
  gap: 8px;
  align-items:center;
}
.nav__link{
  text-decoration:none;
  color: var(--muted);
  padding: 9px 14px;
  border-radius: 999px;
  border:1px solid transparent;
  font-size: 14px;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.nav__link:hover{
  color: var(--text);
  background: var(--panel);
  border-color: var(--line);
}
.nav__link.is-active{
  color: var(--text);
  background: linear-gradient(180deg, #fff, var(--mint));
  border-color: color-mix(in oklab, var(--accent) 45%, var(--line) 55%);
  box-shadow: var(--shadow-soft);
}

.main{ padding-bottom: 48px; }

.section--landing{
  padding-top: 28px;
  padding-bottom: 36px;
}
.section__head--landing{
  margin-bottom: 22px;
}
.section__head--landing .section__title{
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 600;
  letter-spacing: 0.06em;
}
.section__head--landing .section__desc{
  line-height: 1.75;
}
.meta{
  border:1px solid var(--line);
  background: var(--panel);
  border-radius: var(--radius);
  padding: 12px 12px;
}
.meta__k{
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.meta__v{
  font-family: var(--mono);
  letter-spacing:.2px;
  font-weight: 650;
}

.card{
  border:1px solid var(--line);
  background: linear-gradient(180deg, var(--panel2), var(--panel));
  border-radius: var(--radius2);
  padding: 16px;
  box-shadow: var(--shadow);
}
.card__header{
  display:flex;
  justify-content: space-between;
  align-items:center;
  gap: 10px;
  margin-bottom: 12px;
}
.pill{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border:1px solid color-mix(in oklab, var(--line) 70%, var(--accent) 30%);
  background: color-mix(in oklab, var(--panel) 70%, var(--accent) 12%);
  font-size: 12px;
}
.card__title{
  font-size: 18px;
  font-weight: 720;
  margin: 0 0 8px;
}
.card__desc{
  color: var(--muted);
  margin: 0 0 12px;
}
.card__footer{
  display:flex;
  justify-content: space-between;
  align-items:flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius: 999px;
  padding: 10px 18px;
  border:1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  text-decoration:none;
  cursor:pointer;
  user-select:none;
  font-size: 14px;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}
.btn:hover{
  border-color: color-mix(in oklab, var(--accent) 35%, var(--line) 65%);
  box-shadow: var(--shadow-soft);
}
.btn--primary{
  border-color: color-mix(in oklab, var(--accent-deep) 50%, var(--line) 50%);
  background: linear-gradient(165deg, color-mix(in oklab, var(--accent) 28%, var(--panel)), var(--panel));
  color: var(--text);
  font-weight: 500;
}
.btn--primary:hover{
  border-color: var(--accent-deep);
}
.btn--ghost{
  background: transparent;
}
.iconbtn{
  width: 36px;
  height: 36px;
  border-radius: 12px;
  border:1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  cursor:pointer;
  font-size: 18px;
  line-height: 1;
}
.iconbtn:hover{ border-color: color-mix(in oklab, var(--line) 50%, var(--accent2) 50%); }

.section{
  padding: 26px 0;
}
.section__head{
  display:flex;
  align-items:flex-end;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 0 0 16px;
}
.section__title{
  margin:0;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.section__desc{
  margin:0;
  color: var(--muted);
  max-width: 75ch;
  font-size: 14px;
}

.toolbar{
  display:flex;
  align-items:flex-end;
  gap: 10px;
  flex-wrap: wrap;
  border: 1px solid color-mix(in oklab, var(--line) 85%, var(--accent) 15%);
  background: linear-gradient(180deg, var(--panel2), var(--panel));
  border-radius: var(--radius2);
  padding: 14px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-soft);
}
.toolbar__group{
  display:flex;
  flex-direction: column;
  gap: 6px;
  min-width: 160px;
}
.toolbar__group--grow{ flex:1; }
.spacer{ flex:1; }
.label{
  font-size: 12px;
  color: var(--muted);
}
.input,.select{
  border:1px solid var(--line);
  background: color-mix(in oklab, var(--panel2) 80%, var(--bg) 20%);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  outline: none;
}
.input:focus,.select:focus{
  border-color: color-mix(in oklab, var(--line) 55%, var(--accent2) 45%);
}

.grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 12px;
}
.tile{
  grid-column: span 4;
  border:1px solid color-mix(in oklab, var(--line) 80%, var(--accent) 20%);
  background: linear-gradient(180deg, #fffefb, var(--panel));
  border-radius: var(--radius2);
  padding: 14px;
  cursor:pointer;
  transition: transform .12s ease, border-color .12s ease, box-shadow .12s ease;
  box-shadow: var(--shadow-soft);
}
.tile:hover{
  transform: translateY(-2px);
  border-color: color-mix(in oklab, var(--accent) 40%, var(--line) 60%);
  box-shadow: var(--shadow);
}
.tile__top{
  display:flex;
  justify-content: space-between;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 8px;
}
.tile__title{
  font-weight: 740;
  letter-spacing:.2px;
  margin:0;
}
.tile__meta{
  font-size: 12px;
  color: var(--muted);
  font-family: var(--mono);
  margin-top: 6px;
}
.tile__desc{
  margin: 10px 0 12px;
  color: var(--muted);
}

.chips{ display:flex; flex-wrap: wrap; gap: 6px; }
.chip{
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border:1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
}
.chip--accent{
  color: var(--text);
  border-color: color-mix(in oklab, var(--line) 60%, var(--accent2) 40%);
  background: color-mix(in oklab, var(--panel) 75%, var(--accent2) 10%);
}

.two-col{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.pattern-layout--vertical{
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.pattern-layout--vertical .panel{ max-width: 100%; }
.pattern-canvas--40{ image-rendering: pixelated; }

.toast{
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 20px;
  border-radius: 12px;
  background: var(--panel2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  z-index: 200;
  font-weight: 600;
}
.toast[hidden]{ display: none !important; }

.file-protocol-banner{
  background: linear-gradient(90deg, color-mix(in oklab, var(--danger) 85%, white), color-mix(in oklab, var(--accent2) 50%, var(--danger)));
  color: #4a3038;
  text-align: center;
  padding: 11px 14px;
  font-size: 13px;
  border-bottom: 1px solid color-mix(in oklab, var(--danger) 40%, transparent);
}
.file-protocol-banner[hidden]{ display: none !important; }

.modal__foot--actions{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.modal__stats{ display: flex; gap: 16px; }
.modal__stat{ font-size: 14px; color: var(--muted); }
.formrow{
  display:flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}
.formactions{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
}
.hstack{
  display:flex;
  gap: 10px;
  align-items:center;
}
.range{
  display:flex;
  gap: 12px;
  align-items:center;
}
.range input[type="range"]{
  flex:1;
}
.range__value{
  min-width: 72px;
  text-align:right;
  font-family: var(--mono);
  color: var(--muted);
}

.patternPreview{
  border:1px solid color-mix(in oklab, var(--line) 70%, var(--accent) 30%);
  background: linear-gradient(160deg, var(--mint), var(--panel2));
  border-radius: var(--radius2);
  padding: 12px;
  overflow:auto;
}
.canvas{
  width: 100%;
  height: auto;
  image-rendering: pixelated;
  border-radius: 14px;
  background: rgba(58, 54, 50, 0.04);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.7);
}
.kvs{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.kv{
  border:1px solid var(--line);
  background: color-mix(in oklab, var(--panel2) 70%, var(--bg) 30%);
  border-radius: 14px;
  padding: 10px 10px;
}
.kv .k{
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.kv .v{
  font-family: var(--mono);
  font-weight: 650;
}
/* 色号用量：固定多列，避免 flex 单列占满屏 */
.usageGrid{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  width: 100%;
}
@media (min-width: 380px){
  .usageGrid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (min-width: 560px){
  .usageGrid{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
@media (min-width: 800px){
  .usageGrid{
    grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  }
}
.usageItem{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 6px;
  min-width: 0;
  padding: 8px 8px;
  border-radius: 12px;
  border:1px solid var(--line);
  background: color-mix(in oklab, var(--panel2) 70%, var(--bg) 30%);
}
.usageLeft{
  display:flex;
  align-items:center;
  gap: 6px;
  min-width: 0;
  flex: 1;
}
.usageLeft .code{
  flex-shrink: 0;
}
.usageName{
  display: none;
}
@media (min-width: 480px){
  .usageName{
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 5em;
    font-size: 11px;
  }
}
.swatchMini{
  width: 22px;
  height: 18px;
  border-radius: 8px;
  border:1px solid var(--line);
}
.code{
  font-family: var(--mono);
  font-weight: 700;
}
.count{
  font-family: var(--mono);
  color: var(--muted);
}

.invTile{
  grid-column: span 3;
  border:1px solid color-mix(in oklab, var(--line) 80%, var(--accent) 20%);
  background: linear-gradient(180deg, #fffefb, var(--panel2));
  border-radius: var(--radius2);
  padding: 12px;
  box-shadow: var(--shadow-soft);
}
.invTop{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.invTopLeft{
  display:flex;
  align-items:center;
  gap: 10px;
}
.invInput{
  width: 110px;
}

.panel{
  border:1px solid color-mix(in oklab, var(--line) 85%, var(--accent) 15%);
  background: linear-gradient(180deg, #fffefb 0%, var(--panel) 100%);
  border-radius: var(--radius2);
  padding: 18px 18px;
  box-shadow: var(--shadow-soft);
}
.panel__title{
  margin:0 0 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: color-mix(in oklab, var(--text) 92%, var(--accent-deep) 8%);
}

.steps{
  margin:0;
  padding-left: 18px;
  color: var(--text);
}
.steps li{ margin: 10px 0; color: var(--muted); }
.steps--compact li{ margin: 8px 0; }

.note{
  margin-top: 14px;
  border:1px dashed color-mix(in oklab, var(--line) 60%, var(--accent) 40%);
  background: color-mix(in oklab, var(--panel) 80%, var(--accent) 8%);
  border-radius: var(--radius2);
  padding: 12px;
}
.note__title{ font-weight: 700; margin-bottom: 6px; }
.note__body{ color: var(--muted); }

.list{
  list-style: none;
  padding:0;
  margin:0;
}
.list li{
  padding: 10px 10px;
  border:1px solid var(--line);
  background: color-mix(in oklab, var(--panel2) 70%, var(--bg) 30%);
  border-radius: 12px;
  margin-bottom: 10px;
  color: var(--muted);
}
.list--compact li{ margin-bottom: 8px; padding: 9px 10px; }
.list .k{
  display:block;
  color: var(--text);
  font-weight: 700;
  margin-bottom: 4px;
}
.list .s{
  font-family: var(--mono);
  font-size: 12px;
  opacity: .9;
}

.divider{
  height:1px;
  background: var(--line);
  margin: 14px 0;
}

.muted{ color: var(--muted); }
.inline-code{
  font-family: var(--mono);
  font-size: 0.88em;
  padding: 2px 6px;
  border-radius: 6px;
  background: color-mix(in oklab, var(--mint) 60%, var(--panel));
  border: 1px solid var(--line);
}
.link{
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--line) 50%, var(--accent2) 50%);
}
.link:hover{
  border-bottom-color: color-mix(in oklab, var(--line) 30%, var(--accent) 70%);
}

.empty{
  border:1px solid var(--line);
  background: var(--panel);
  border-radius: var(--radius2);
  padding: 20px;
  margin-top: 12px;
  text-align:center;
}
.empty__title{
  font-weight: 750;
  margin-bottom: 6px;
}
.empty__desc{ color: var(--muted); }

.footer{
  border-top: 1px solid color-mix(in oklab, var(--line) 70%, var(--accent2) 30%);
  background: linear-gradient(180deg, color-mix(in oklab, var(--sakura) 35%, var(--bg)), var(--bg));
  padding: 22px 0;
  font-size: 13px;
}
.footer__inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.footer__links{ display:flex; gap: 12px; }

.modal{
  position: fixed;
  inset:0;
  display:grid;
  place-items: center;
  padding: 18px;
  z-index: 100;
}
.modal[hidden]{
  display:none;
}
.modal__backdrop{
  position:absolute;
  inset:0;
  background: rgba(58, 54, 50, 0.38);
  backdrop-filter: blur(4px);
}
.modal__panel{
  position: relative;
  width: min(860px, 100%);
  max-height: min(86vh, 820px);
  overflow: auto;
  border:1px solid color-mix(in oklab, var(--line) 75%, var(--accent2) 25%);
  background: linear-gradient(180deg, #fffefb, var(--panel));
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.modal__head{
  display:flex;
  justify-content: space-between;
  align-items:flex-start;
  gap: 12px;
  padding: 14px 14px 10px;
  position: sticky;
  top:0;
  backdrop-filter: blur(14px);
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
}
.modal__title{
  font-size: 18px;
  font-weight: 780;
  letter-spacing:.2px;
}
.modal__body{ padding: 12px 14px 14px; }
.modal__foot{
  padding: 12px 14px 14px;
  border-top: 1px solid var(--line);
  display:flex;
  justify-content: flex-end;
}
.modal__section{ margin-top: 14px; }
.sectionlabel{
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 8px;
  font-weight: 500;
}
.readable{ color: var(--muted); }
.swatches{
  display:flex;
  gap: 8px;
  flex-wrap: wrap;
}
.swatch{
  width: 34px;
  height: 26px;
  border-radius: 10px;
  border:1px solid var(--line);
  background: var(--panel);
  position: relative;
}
.swatch::after{
  content: attr(data-name);
  position:absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -18px;
  font-size: 10px;
  color: var(--muted);
  white-space: nowrap;
}

.faq{
  display:flex;
  flex-direction: column;
  gap: 10px;
}
.faq details{
  border:1px solid var(--line);
  background: color-mix(in oklab, var(--panel2) 70%, var(--bg) 30%);
  border-radius: 14px;
  padding: 10px 12px;
}
.faq summary{
  cursor:pointer;
  font-weight: 720;
  color: var(--text);
}
.faq .a{ color: var(--muted); margin-top: 8px; }

.contact{
  display:grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.contact .row{
  border:1px solid var(--line);
  background: color-mix(in oklab, var(--panel2) 70%, var(--bg) 30%);
  border-radius: 14px;
  padding: 10px 12px;
}
.contact .k{
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 6px;
}
.contact .v{
  font-family: var(--mono);
  letter-spacing: .2px;
}

@media (max-width: 900px){
  .tile{ grid-column: span 6; }
  .two-col{ grid-template-columns: 1fr; }
  .invTile{ grid-column: span 4; }
  .kvs{ grid-template-columns: 1fr; }
}

@media (max-width: 560px){
  .nav__toggle{ display:inline-flex; }
  .nav__links{
    display:none;
    position: absolute;
    right: 18px;
    top: 64px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 10px;
    background: color-mix(in oklab, var(--bg) 84%, transparent);
    border:1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
    min-width: 160px;
  }
  .nav__links.is-open{ display:flex; }
  .tile{ grid-column: span 12; }
  .toolbar__group{ min-width: 140px; }
  .invTile{ grid-column: span 12; }
}