/* ==========================================================
   非遗拼豆工坊 - 自定义样式
   主题：朱砂红 / 青瓷青 / 米白
   ========================================================== */

:root {
  --c-primary: #C83C23;     /* 朱砂红 */
  --c-primary-dark: #A22E18;
  --c-secondary: #69A79A;   /* 青瓷青 */
  --c-secondary-dark: #4F8A7E;
  --c-bg: #F5F0E6;          /* 米白 */
  --c-paper: #FBF8F1;       /* 宣纸白 */
  --c-ink: #2B2A28;         /* 墨色 */
  --c-line: #D9CFB8;        /* 边缘线 */
  --c-muted: #8A8170;       /* 次要文字 */
  --radius-card: 12px;
  --radius-btn: 8px;
  --shadow-sm: 0 2px 6px rgba(43, 42, 40, 0.06);
  --shadow-md: 0 6px 20px rgba(43, 42, 40, 0.10);
}

* { box-sizing: border-box; }

html, body {
  background-color: var(--c-bg);
  color: var(--c-ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 标题字体：衬线字体增强国风感 */
.font-serif, h1, h2, h3, .brand-title {
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  letter-spacing: 0.04em;
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 240, 230, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-line);
}
.nav-link {
  position: relative;
  padding: 0.5rem 0.25rem;
  color: var(--c-ink);
  transition: color .2s ease;
}
.nav-link:hover { color: var(--c-primary); }
.nav-link.active {
  color: var(--c-primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
}
.brand-mark {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #E25B45 0%, var(--c-primary) 60%, var(--c-primary-dark) 100%);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--c-paper);
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.2), 0 2px 6px rgba(200,60,35,.3);
  overflow: hidden;
}
.brand-logo {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* ===== 装饰：祥云/回纹（SVG 数据 URI） ===== */
.deco-cloud {
  position: absolute;
  opacity: .12;
  pointer-events: none;
  background-repeat: no-repeat;
  background-size: contain;
}
.deco-cloud-tl { top: 0; left: 0; width: 180px; height: 120px; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 120'><path fill='%23C83C23' d='M10 80 Q 30 40 70 60 T 130 60 T 200 60 L 200 120 L 10 120 Z'/><circle cx='40' cy='50' r='10' fill='%23C83C23'/><circle cx='90' cy='40' r='12' fill='%23C83C23'/><circle cx='150' cy='50' r='10' fill='%23C83C23'/></svg>"); }
.deco-cloud-br { bottom: 0; right: 0; width: 200px; height: 140px; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 140'><path fill='%2369A79A' d='M0 100 Q 50 60 100 90 T 200 90 L 200 140 L 0 140 Z'/><circle cx='40' cy='90' r='12' fill='%2369A79A'/><circle cx='110' cy='75' r='14' fill='%2369A79A'/><circle cx='170' cy='95' r='10' fill='%2369A79A'/></svg>"); }

.deco-border {
  background-image:
    linear-gradient(90deg, transparent 0, transparent 8px, var(--c-primary) 8px, var(--c-primary) 10px, transparent 10px, transparent 18px),
    linear-gradient(90deg, transparent 0, transparent 8px, var(--c-secondary) 8px, var(--c-secondary) 10px, transparent 10px, transparent 18px);
  background-size: 18px 2px, 18px 2px;
  background-position: 0 0, 0 4px;
  background-repeat: repeat-x;
  height: 6px;
}

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem;
  padding: .65rem 1.25rem;
  border-radius: var(--radius-btn);
  font-weight: 500;
  transition: all .2s ease;
  cursor: pointer;
  user-select: none;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(200,60,35,.25);
}
.btn-primary:hover:not(:disabled) { background: var(--c-primary-dark); transform: translateY(-1px); }
.btn-primary:disabled { background: #C9A99A; box-shadow: none; cursor: not-allowed; }
.btn-secondary {
  background: var(--c-secondary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(105,167,154,.25);
}
.btn-secondary:hover:not(:disabled) { background: var(--c-secondary-dark); }
.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border-color: var(--c-primary);
}
.btn-outline:hover { background: var(--c-primary); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-line);
}
.btn-ghost:hover { background: var(--c-paper); }

/* ===== 卡片 ===== */
.card {
  background: var(--c-paper);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
}

/* ===== 上传区域 ===== */
.upload-zone {
  border: 2px dashed var(--c-line);
  border-radius: var(--radius-card);
  background: rgba(251, 248, 241, .6);
  transition: all .25s ease;
  cursor: pointer;
  min-height: 220px;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column;
  text-align: center;
  padding: 2rem;
}
.upload-zone:hover, .upload-zone.is-drag {
  border-color: var(--c-primary);
  background: rgba(200,60,35,.05);
}
.upload-zone .icon-cloud {
  font-size: 3rem;
  color: var(--c-secondary);
  margin-bottom: .75rem;
}

/* ===== 表单控件 ===== */
.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: .5rem;
  color: var(--c-ink);
}
.form-control, .form-select {
  width: 100%;
  padding: .6rem .85rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-btn);
  background: #fff;
  color: var(--c-ink);
  transition: border-color .2s ease, box-shadow .2s ease;
  font-size: .95rem;
}
.form-control:focus, .form-select:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(200,60,35,.12);
}
.form-help {
  font-size: .8rem;
  color: var(--c-muted);
  margin-top: .35rem;
}

/* 单选按钮组 */
.radio-group {
  display: flex; flex-wrap: wrap; gap: .5rem;
}
.radio-chip {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center;
  padding: .55rem 1rem;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  background: #fff;
  color: var(--c-ink);
  cursor: pointer;
  transition: all .2s ease;
  font-size: .9rem;
  user-select: none;
}
.radio-chip input { position: absolute; opacity: 0; pointer-events: none; }
.radio-chip:hover { border-color: var(--c-secondary); }
.radio-chip.is-checked {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
  box-shadow: 0 2px 8px rgba(200,60,35,.25);
}

/* ===== Tab 切换 ===== */
.tabs {
  display: inline-flex;
  background: var(--c-paper);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  padding: 4px;
  position: relative;
}
.tab-btn {
  position: relative;
  padding: .55rem 1.25rem;
  border-radius: 999px;
  font-weight: 500;
  color: var(--c-muted);
  transition: color .25s ease;
  z-index: 1;
  cursor: pointer;
  background: transparent;
  border: 0;
  font-size: .95rem;
}
.tab-btn.active { color: #fff; }
.tab-indicator {
  position: absolute;
  top: 4px; bottom: 4px;
  background: var(--c-primary);
  border-radius: 999px;
  transition: all .35s cubic-bezier(.4,0,.2,1);
  z-index: 0;
  box-shadow: 0 4px 12px rgba(200,60,35,.25);
}

/* Tab 切换淡入动画 */
.fade-in { animation: fadeIn .35s ease both; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== 结果展示 ===== */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 768px) {
  .compare-grid { grid-template-columns: 1fr; }
}
.compare-card {
  background: var(--c-paper);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-card);
  padding: 1rem;
  text-align: center;
}
.compare-card .title {
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: .75rem;
  display: flex; align-items: center; justify-content: center; gap: .35rem;
}
.compare-card .title .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c-primary); }
.compare-card .title .dot.alt { background: var(--c-secondary); }
.compare-frame {
  width: 100%;
  aspect-ratio: 1 / 1;
  background:
    linear-gradient(45deg, #ede5d2 25%, transparent 25%),
    linear-gradient(-45deg, #ede5d2 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ede5d2 75%),
    linear-gradient(-45deg, transparent 75%, #ede5d2 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  background-color: #fbf8f1;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  border: 1px solid var(--c-line);
}
.compare-frame img { max-width: 100%; max-height: 100%; display: block; image-rendering: pixelated; }

/* 拼豆像素化网格（纯 canvas 降级方案使用） */
.pixel-grid {
  display: grid;
  gap: 0;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 6px;
  overflow: hidden;
}
.pixel-grid .px {
  width: 100%;
  aspect-ratio: 1 / 1;
  transition: opacity .15s ease;
}
.pixel-grid .px:hover { opacity: .85; }

/* 加载/骨架 */
.skeleton {
  position: relative;
  overflow: hidden;
  background: #ece4d0;
  border-radius: 8px;
}
.skeleton::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.5), transparent);
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer { 0% { transform: translateX(-100%);} 100% { transform: translateX(100%);} }

.loading-overlay {
  position: absolute; inset: 0;
  background: rgba(245, 240, 230, .85);
  display: flex; align-items: center; justify-content: center;
  flex-direction: column;
  gap: .75rem;
  border-radius: 8px;
  z-index: 5;
}
.spinner {
  width: 38px; height: 38px;
  border: 3px solid var(--c-line);
  border-top-color: var(--c-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 进度文本与步骤 */
.progress-tip {
  display: flex; align-items: center; gap: .5rem;
  color: var(--c-primary);
  font-size: .9rem;
}

/* 色号参考 */
.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: .5rem;
}
.palette-item {
  display: flex; flex-direction: column; align-items: center;
  padding: .5rem;
  border: 1px solid var(--c-line);
  border-radius: 8px;
  background: #fff;
  font-size: .75rem;
  color: var(--c-muted);
  text-align: center;
}
.palette-swatch {
  width: 36px; height: 36px; border-radius: 6px;
  border: 1px solid rgba(0,0,0,.08);
  margin-bottom: .35rem;
}

/* ===== 非遗介绍页瀑布流 ===== */
.masonry {
  column-count: 3;
  column-gap: 1.25rem;
}
@media (max-width: 1024px) { .masonry { column-count: 2; } }
@media (max-width: 640px)  { .masonry { column-count: 1; } }
.masonry-item {
  break-inside: avoid;
  margin-bottom: 1.25rem;
  background: var(--c-paper);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: inline-block;
  width: 100%;
  transition: transform .25s ease, box-shadow .25s ease;
}
.masonry-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.masonry-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: #ece4d0;
}
.masonry-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
  opacity: 0;
}
.masonry-img-wrap img.loaded { opacity: 1; transition: opacity .6s ease; }
.masonry-item:hover .masonry-img-wrap img { transform: scale(1.04); }
.masonry-body { padding: 1.1rem 1.1rem 1.2rem; }
.masonry-level {
  display: inline-block;
  padding: .15rem .6rem;
  font-size: .72rem;
  background: rgba(200,60,35,.1);
  color: var(--c-primary);
  border-radius: 999px;
  margin-bottom: .6rem;
  font-weight: 500;
}
.masonry-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: .35rem;
  color: var(--c-ink);
}
.masonry-region {
  font-size: .8rem;
  color: var(--c-muted);
  margin-bottom: .75rem;
  display: flex; align-items: center; gap: .35rem;
}
.masonry-section {
  margin-top: .8rem;
}
.masonry-section h4 {
  font-size: .9rem;
  font-weight: 600;
  color: var(--c-primary);
  margin-bottom: .25rem;
  display: flex; align-items: center; gap: .35rem;
}
.masonry-section p {
  font-size: .88rem;
  line-height: 1.7;
  color: #4a4642;
}
.masonry-samples {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .4rem;
  margin-top: .8rem;
}
.masonry-samples div {
  aspect-ratio: 1 / 1;
  border-radius: 6px;
  overflow: hidden;
  background: #ece4d0;
}
.masonry-samples img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .5s ease;
}
.masonry-samples img.loaded { opacity: 1; }

/* ===== Toast 通知 ===== */
.toast-host {
  position: fixed;
  top: 80px; right: 24px;
  display: flex; flex-direction: column; gap: .5rem;
  z-index: 100;
  pointer-events: none;
}
.toast {
  background: var(--c-ink);
  color: #fff;
  padding: .75rem 1.1rem;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  font-size: .9rem;
  pointer-events: auto;
  animation: slideIn .3s ease both;
  max-width: 360px;
  display: flex; align-items: center; gap: .5rem;
}
.toast.success { background: var(--c-secondary); }
.toast.error { background: var(--c-primary); }
.toast.warn { background: #C28A2C; }
@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ===== API 密钥弹窗 ===== */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(43,42,40,.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  animation: fadeIn .2s ease;
}
.modal {
  background: var(--c-paper);
  border-radius: 12px;
  width: min(92vw, 480px);
  padding: 1.5rem 1.5rem 1.25rem;
  box-shadow: var(--shadow-md);
  animation: fadeIn .25s ease;
}
.modal h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: .5rem; }
.modal p { color: var(--c-muted); font-size: .88rem; line-height: 1.7; margin-bottom: 1rem; }
.modal .actions { display: flex; justify-content: flex-end; gap: .5rem; margin-top: 1rem; }

/* 区块标题 */
.section-title {
  display: flex; align-items: center; gap: .5rem;
  font-size: 1.1rem; font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 1rem;
}
.section-title::before {
  content: '';
  width: 4px; height: 18px;
  background: var(--c-primary);
  border-radius: 2px;
}

/* 文字溢出 */
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 页脚 */
.site-footer {
  margin-top: 4rem;
  border-top: 1px solid var(--c-line);
  background: var(--c-paper);
  color: var(--c-muted);
  font-size: .85rem;
  padding: 2rem 1.5rem;
}