:root {
  --color-bg:      #faf6f1;
  --color-surface: #fffdf9;
  --color-border:  #ecdfd0;
  --color-primary: #c2410c;
  --color-primary-h:#9a3412;
  --color-accent:  #b45309;
  --color-success: #4d7c0f;
  --color-warning: #d97706;
  --color-danger:  #dc2626;
  --color-text:    #1c1917;
  --color-muted:   #78716c;
  --radius-sm:     8px;
  --radius:        12px;
  --radius-lg:     16px;
  --shadow-sm:     0 1px 3px rgba(60,40,20,0.08);
  --shadow:        0 4px 16px rgba(60,40,20,0.08);
  --shadow-lg:     0 8px 32px rgba(60,40,20,0.12);
  --transition:    0.2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; min-height: 100vh; }
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Segoe UI Emoji', 'Apple Color Emoji', 'Noto Color Emoji', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
.fa, .fas, .far, .fa-solid, .fa-regular { font-family: "Font Awesome 6 Free" !important; font-weight: 900; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-h); }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }

/* 导航 */
.nav { background: #fff7ed; border-bottom: 1px solid var(--color-border); }
.nav-inner { height: 68px; display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--color-text); }
.logo:hover { color: var(--color-text); }
.logo-beads { display: flex; gap: 3px; }
.logo-beads i { width: 12px; height: 12px; border-radius: 50%; display: block; }
.logo-beads i:nth-child(1) { background: #c2410c; }
.logo-beads i:nth-child(2) { background: #d97706; }
.logo-beads i:nth-child(3) { background: #4d7c0f; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--color-muted); font-weight: 500; font-size: 15px; }
.nav-links a:hover { color: var(--color-primary); }
.nav-links a.active { color: var(--color-primary); font-weight: 700; }

/* Hero */
.hero { padding: 72px 0 48px; text-align: center; }
.hero h1 { font-size: 52px; line-height: 1.3; font-weight: 800; letter-spacing: -0.5px; }
.hero p { margin-top: 18px; font-size: 18px; color: var(--color-muted); }

/* 内页标题 */
.page-head { padding: 64px 0 40px; text-align: center; }
.page-head h1 { font-size: 44px; font-weight: 800; letter-spacing: -0.5px; }
.page-head p { margin-top: 12px; font-size: 17px; color: var(--color-muted); }

/* 工作台 */
.workbench { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 30px;
  box-shadow: var(--shadow);
}
.panel-title { font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.panel-title i { color: var(--color-primary); font-size: 17px; }
.mt16 { margin-top: 16px; }
.mt24 { margin-top: 24px; }
.mt32 { margin-top: 32px; }

/* 上传区 */
.dropzone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  background: #fffaf3;
  padding: 44px 24px;
  text-align: center;
  color: var(--color-muted);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.dropzone:hover, .dropzone.dragover { border-color: var(--color-primary); background: #fff3e6; }
.dropzone i { font-size: 40px; color: var(--color-accent); margin-bottom: 12px; }
.dropzone-main { font-size: 16px; font-weight: 600; color: var(--color-text); }
.dropzone-sub { font-size: 13px; margin-top: 6px; }
.upload-preview { display: flex; align-items: center; gap: 16px; }
.upload-preview img { width: 140px; height: 140px; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--color-border); }

/* 尺寸选择 */
.size-options { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.size-btn {
  padding: 14px 8px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  background: #fffaf3;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  transition: all var(--transition);
}
.size-btn span { display: block; font-size: 12px; font-weight: 400; color: var(--color-muted); margin-top: 4px; }
.size-btn:hover { border-color: var(--color-accent); transform: translateY(-1px); }
.size-btn.active { border-color: var(--color-primary); background: #fff3e6; color: var(--color-primary); }

/* 颜色数量 */
.color-range-row { display: flex; align-items: center; gap: 16px; }
.color-range-row input[type="range"] { flex: 1; accent-color: var(--color-primary); }
.color-count-val { font-weight: 700; font-size: 17px; color: var(--color-primary); min-width: 56px; text-align: right; }
.hint { font-size: 13px; color: var(--color-muted); margin-top: 8px; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: var(--radius); border: none;
  padding: 10px 24px; font-size: 15px; font-weight: 600;
  transition: all var(--transition);
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-h); color: #fff; transform: translateY(-1px); }
.btn-primary:disabled { background: #d6c8b8; cursor: not-allowed; transform: none; }
.btn-outline { background: transparent; border: 1.5px solid var(--color-primary); color: var(--color-primary); }
.btn-outline:hover { background: #fff3e6; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--color-muted); border: 1px solid var(--color-border); }
.btn-ghost:hover { color: var(--color-primary); border-color: var(--color-primary); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-lg { padding: 14px 24px; font-size: 17px; }
.btn-block { width: 100%; }

/* 画布预览 */
.canvas-wrap { position: relative; background: #fffaf3; border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; }
#patternCanvas { width: 100%; height: auto; display: block; }
.canvas-empty {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; color: var(--color-muted); background: #fffaf3;
}
.canvas-empty i { font-size: 36px; color: #d6c8b8; }
.canvas-empty p { font-size: 14px; }

/* 结果统计 */
.result-meta { display: flex; gap: 12px; margin-top: 20px; }
.meta-item {
  flex: 1; background: #fffaf3; border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 14px 10px; text-align: center;
}
.meta-item strong { display: block; font-size: 22px; color: var(--color-primary); }
.meta-item span { font-size: 12px; color: var(--color-muted); }

/* 配色清单 */
.palette-box { margin-top: 20px; }
.palette-box h3 { font-size: 15px; margin-bottom: 10px; }
.palette-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; }
.palette-swatch { text-align: center; }
.palette-swatch .sw { width: 100%; aspect-ratio: 1; border-radius: 50%; border: 2px solid #fff; box-shadow: 0 1px 4px rgba(60,40,20,0.25); }
.palette-swatch .n { font-size: 11px; color: var(--color-muted); margin-top: 4px; }

/* 图纸库 */
.gallery-stats { display: flex; gap: 12px; margin-bottom: 32px; }
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.gallery-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.gallery-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.gallery-thumb { aspect-ratio: 1; display: flex; align-items: center; justify-content: center; }
.thumb-a { background: #fef3c7; }
.thumb-b { background: #ffe4e6; }
.thumb-c { background: #d1fae5; }
.thumb-d { background: #e0f2fe; }
.pixel-demo { width: 58%; aspect-ratio: 1; background-image: radial-gradient(circle, currentColor 34%, transparent 36%); background-size: 20% 20%; }
.p-a { color: #c2410c; }
.p-b { color: #be123c; }
.p-c { color: #3f6212; }
.p-d { color: #0369a1; }
.gallery-info { padding: 18px 20px 20px; }
.gallery-info h3 { font-size: 17px; margin-bottom: 6px; }
.gallery-meta { font-size: 13px; color: var(--color-muted); }
.gallery-meta i, .gallery-date i { margin-right: 6px; color: var(--color-accent); }
.gallery-date { font-size: 12px; color: #a8a29e; margin-top: 2px; }
.gallery-actions { display: flex; gap: 8px; margin-top: 14px; }
.gallery-actions .btn-outline { flex: 1; }
.empty-tip {
  margin: 48px 0 64px; text-align: center; color: var(--color-muted); font-size: 14px;
}
.empty-tip i { font-size: 26px; color: #d6c8b8; margin-bottom: 8px; display: block; }

/* 登录 */
.login-wrap { display: flex; justify-content: center; padding: 72px 0 96px; }
.login-card {
  width: 100%; max-width: 440px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 40px 44px;
  box-shadow: var(--shadow);
}
.login-head { text-align: center; margin-bottom: 28px; }
.login-head h1 { font-size: 30px; margin-top: 14px; }
.login-head p { font-size: 14px; color: var(--color-muted); margin-top: 6px; }
.login-beads { justify-content: center; }
.login-beads i { width: 16px; height: 16px; }
.field-label { display: block; font-size: 14px; font-weight: 600; margin: 16px 0 6px; }
.field-input {
  width: 100%; padding: 11px 14px;
  border: 1.5px solid var(--color-border); border-radius: var(--radius);
  background: #fffaf3; font-size: 15px; font-family: inherit; color: var(--color-text);
  transition: border-color var(--transition);
}
.field-input:focus { outline: none; border-color: var(--color-primary); background: #fff; }
.login-foot { text-align: center; font-size: 14px; color: var(--color-muted); margin-top: 20px; }

/* 特性区 */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 64px; padding-bottom: 64px; }
.feature-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 28px 26px; box-shadow: var(--shadow-sm);
}
.feature-card i { font-size: 26px; color: var(--color-accent); }
.feature-card h3 { font-size: 18px; margin: 14px 0 8px; }
.feature-card p { font-size: 14px; color: var(--color-muted); }

/* 页脚 */
.footer { background: #fff7ed; border-top: 1px solid var(--color-border); padding: 28px 0; text-align: center; color: var(--color-muted); font-size: 14px; }

/* 窄屏 */
@media (max-width: 768px) {
  .hero h1 { font-size: 34px; }
  .page-head h1 { font-size: 30px; }
  .workbench, .features { grid-template-columns: 1fr; }
  .size-options { grid-template-columns: repeat(2, 1fr); }
  .palette-grid { grid-template-columns: repeat(4, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-stats { flex-direction: column; }
  .nav-links { gap: 16px; }
  .login-card { padding: 28px 24px; }
}