/* ======= LocaleCanvas — 主样式 ======= */

/* Critical: 阻止 display:grid/flex 覆盖 hidden 属性 */
[hidden] { display: none !important; }

/* ---- CSS 变量 ---- */
:root {
  --blue:      #2563eb;
  --blue-lt:   #eff6ff;
  --blue-mid:  #bfdbfe;
  --violet:    #7c3aed;
  --green:     #059669;
  --orange:    #ea580c;
  --teal:      #0891b2;
  --indigo:    #4f46e5;

  --text:      #0f172a;
  --text-2:    #475569;
  --text-3:    #94a3b8;
  --border:    #e2e8f0;
  --bg:        #ffffff;
  --bg-soft:   #f8fafc;
  --bg-muted:  #f1f5f9;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow:    0 4px 16px rgba(0,0,0,.07), 0 1px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.1),  0 2px 8px rgba(0,0,0,.05);

  --radius-sm: 8px;
  --radius:    14px;
  --radius-lg: 20px;

  --nav-h:     60px;

  --font-sans: 'Inter', 'SF Pro Display', system-ui, -apple-system,
               'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC',
               'Hiragino Sans', 'Yu Gothic', 'Malgun Gothic', sans-serif;
}

/* ---- 重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
textarea { font-family: var(--font-sans); }
img { max-width: 100%; display: block; }

/* ---- 语言特定排版 ---- */
:lang(zh), :lang(ja) { word-break: break-all; letter-spacing: 0; }
:lang(ko) { word-break: keep-all; letter-spacing: -.01em; }

/* ======= 导航 ======= */
.navbar {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0,0,0,.06);
}
.nav-inner {
  max-width: 1180px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; gap: 16px;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 1.05rem; color: var(--text); flex-shrink: 0;
}
.logo-icon { border-radius: 7px; flex-shrink: 0; }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-link-text {
  padding: 6px 12px; border-radius: 8px;
  font-size: .875rem; color: var(--text-2);
  transition: color .15s, background .15s;
}
.nav-link-text:hover { color: var(--text); background: var(--bg-muted); }

/* 语言切换 */
.lang-switcher { position: relative; }
.lang-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 6px 12px; border-radius: 8px;
  font-size: .875rem; color: var(--text-2);
  transition: color .15s, background .15s; white-space: nowrap;
}
.lang-btn:hover { color: var(--text); background: var(--bg-muted); }
.lang-btn svg { opacity: .7; flex-shrink: 0; }
.lang-dropdown {
  position: absolute; top: calc(100% + 6px); right: 0;
  background: var(--bg); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow-lg); min-width: 130px; padding: 6px;
  opacity: 0; transform: translateY(-6px) scale(.97); pointer-events: none;
  transition: opacity .15s, transform .15s;
}
.lang-dropdown.open { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.lang-option {
  display: block; padding: 7px 12px; border-radius: 8px;
  font-size: .875rem; color: var(--text-2); cursor: pointer;
  transition: background .1s, color .1s;
}
.lang-option:hover { background: var(--bg-muted); color: var(--text); }
.lang-option.active { color: var(--blue); font-weight: 600; background: var(--blue-lt); }
.btn-nav {
  padding: 7px 18px; background: var(--blue); color: #fff;
  border-radius: 9px; font-size: .875rem; font-weight: 600; white-space: nowrap;
  transition: background .15s, transform .1s; margin-left: 4px;
}
.btn-nav:hover { background: #1d4ed8; transform: translateY(-1px); }

/* ======= Hero ======= */
.hero-wrap {
  /* 全宽背景，铺满屏幕 */
  background: linear-gradient(160deg, #eef5ff 0%, #f5f0ff 45%, #edfdf5 100%);
  padding: 0 24px;
}
.hero {
  max-width: 1180px; margin: 0 auto;
  padding: 80px 0 80px;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; gap: 48px;
}
.hero-inner { display: flex; flex-direction: column; gap: 20px; }
.badge {
  display: inline-flex; align-items: center;
  padding: 4px 14px; background: rgba(37,99,235,.1);
  color: var(--blue); border-radius: 99px;
  font-size: .8rem; font-weight: 600; width: fit-content;
}
.hero-h1 {
  font-size: clamp(2rem, 4vw, 2.9rem); font-weight: 800;
  line-height: 1.2; color: var(--text); letter-spacing: -.02em;
}
:lang(zh) .hero-h1, :lang(ja) .hero-h1, :lang(ko) .hero-h1 { letter-spacing: -.01em; }
.gradient-text {
  background: linear-gradient(135deg, var(--blue) 0%, var(--violet) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-sub { font-size: 1.05rem; color: var(--text-2); max-width: 52ch; line-height: 1.7; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.btn-hero-primary {
  display: inline-flex; align-items: center;
  padding: 12px 26px; background: var(--blue); color: #fff;
  border-radius: 12px; font-weight: 700; font-size: 1rem;
  transition: background .15s, transform .12s, box-shadow .15s;
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
}
.btn-hero-primary:hover { background: #1d4ed8; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(37,99,235,.4); }
.btn-hero-ghost {
  display: inline-flex; align-items: center;
  padding: 11px 22px; border: 1.5px solid var(--border);
  border-radius: 12px; font-weight: 600; font-size: .95rem;
  color: var(--text-2); background: rgba(255,255,255,.7);
  transition: border-color .15s, color .15s, background .15s;
}
.btn-hero-ghost:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-lt); }
.hero-note { font-size: .8rem; color: var(--text-3); }

/* Hero 视觉 */
.hero-visual {
  display: flex; align-items: center; justify-content: center;
  gap: 20px; padding-bottom: 40px;
}
.hv-card {
  background: var(--bg); border-radius: var(--radius); padding: 20px;
  box-shadow: var(--shadow); border: 1px solid var(--border);
  width: 170px; min-height: 160px;
  display: flex; flex-direction: column; gap: 12px;
}
.hv-label { font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--text-3); }
.hv-card--img svg { border-radius: 8px; }
.hv-lines { display: flex; flex-direction: column; gap: 5px; }
.hv-line { height: 5px; border-radius: 3px; background: var(--bg-muted); }
.hv-line--1 { width: 80%; } .hv-line--2 { width: 55%; }
.hv-text-lines { display: flex; flex-direction: column; gap: 7px; margin-top: 4px; }
.hv-tl { height: 9px; border-radius: 4px; background: linear-gradient(90deg, #dbeafe, #e0e7ff); animation: shimmer 2s ease-in-out infinite; }
.hv-tl--1 { width: 100%; animation-delay:   0s; }
.hv-tl--2 { width:  88%; animation-delay: .15s; }
.hv-tl--3 { width:  74%; animation-delay:  .3s; }
.hv-tl--4 { width:  91%; animation-delay: .45s; }
.hv-tl--5 { width:  60%; animation-delay:  .6s; }
@keyframes shimmer { 0%,100% { opacity: 1; } 50% { opacity: .45; } }
.hv-arrow { display: flex; flex-direction: column; align-items: center; gap: 6px; flex-shrink: 0; }
.hv-arrow-pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--blue); animation: pulse 1.5s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .4; transform: scale(1.5); } }

/* ======= Section 共用 ======= */
.section-inner { max-width: 1180px; margin: 0 auto; padding: 80px 24px; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 800; letter-spacing: -.02em; color: var(--text); }
.section-header p { margin-top: 10px; color: var(--text-2); font-size: 1rem; }

/* ======= Features ======= */
.features-section { background: var(--bg); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feat-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; display: flex; flex-direction: column; gap: 10px;
  transition: box-shadow .2s, transform .2s, border-color .2s;
}
.feat-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); border-color: #c7d2fe; }
.feat-icon { width: 44px; height: 44px; border-radius: 11px; display: flex; align-items: center; justify-content: center; }
.feat-icon--blue   { background: #eff6ff; color: var(--blue); }
.feat-icon--purple { background: #f5f3ff; color: var(--violet); }
.feat-icon--green  { background: #ecfdf5; color: var(--green); }
.feat-icon--orange { background: #fff7ed; color: var(--orange); }
.feat-icon--teal   { background: #ecfeff; color: var(--teal); }
.feat-icon--indigo { background: #eef2ff; color: var(--indigo); }
.feat-card h3 { font-size: .95rem; font-weight: 700; color: var(--text); }
.feat-card p  { font-size: .85rem; color: var(--text-2); line-height: 1.6; }

/* ======= 工具区 ======= */
.tool-section { background: var(--bg-soft); }
.tool-card { background: var(--bg); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); border: 1px solid var(--border); overflow: hidden; }

/* 上传区 */
.upload-zone {
  position: relative; min-height: 320px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background .2s;
}
.upload-zone::before {
  content: ''; position: absolute; inset: 16px;
  border: 2px dashed var(--border); border-radius: var(--radius);
  pointer-events: none; transition: border-color .2s;
}
.upload-zone:hover::before, .upload-zone.drag-over::before { border-color: var(--blue); }
.upload-zone.drag-over { background: var(--blue-lt); }
.upload-zone:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.upload-center { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 40px 24px; text-align: center; }
.upload-icon-wrap {
  width: 72px; height: 72px; background: var(--bg-muted); border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3); transition: background .2s, color .2s, transform .2s;
}
.upload-zone:hover .upload-icon-wrap { background: var(--blue-lt); color: var(--blue); transform: scale(1.05); }
.upload-title { font-size: 1rem; font-weight: 600; color: var(--text); }
.upload-sub   { font-size: .85rem; color: var(--text-3); }
.upload-tip {
  font-size: .75rem; color: var(--text-3);
  background: var(--bg-muted); border-radius: 6px;
  padding: 4px 10px; margin-top: -2px;
  display: flex; align-items: center; gap: 4px;
  max-width: 36ch; text-align: center; line-height: 1.5;
}
.upload-tip::before {
  content: 'ℹ';
  flex-shrink: 0; font-style: normal;
  color: var(--text-3); font-size: .8em;
}
.upload-actions { display: flex; gap: 10px; margin-top: 4px; flex-wrap: wrap; justify-content: center; }

/* 结果区准确率提示 tooltip */
.result-accuracy-tip {
  position: relative;
  display: inline-flex; align-items: center;
  color: var(--text-3); cursor: default;
  margin-left: 4px;
  /* 不让 flex 压缩图标 */
  flex-shrink: 0;
}
.result-accuracy-tip:hover .tip-popup,
.result-accuracy-tip:focus .tip-popup {
  opacity: 1; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.tip-popup {
  position: absolute;
  /* 水平居中对齐图标 */
  left: 50%; top: calc(100% + 8px);
  transform: translateX(-50%) translateY(-4px);
  width: 220px;
  background: #1e293b; color: #f1f5f9;
  border-radius: 8px; padding: 8px 12px;
  font-size: .75rem; line-height: 1.55;
  white-space: normal; word-break: break-word;
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
  opacity: 0; pointer-events: none;
  transition: opacity .15s, transform .15s;
  z-index: 200;
}
/* 小箭头 */
.tip-popup::before {
  content: '';
  position: absolute; bottom: 100%; left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-bottom-color: #1e293b;
}

/* 按钮 */
.btn-primary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px; background: var(--blue); color: #fff;
  border-radius: 10px; font-size: .9rem; font-weight: 600;
  transition: background .15s, transform .1s;
}
.btn-primary:hover { background: #1d4ed8; transform: translateY(-1px); }
.btn-outline {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px; border: 1.5px solid var(--border);
  border-radius: 10px; font-size: .9rem; font-weight: 500;
  color: var(--text-2); background: transparent;
  transition: border-color .15s, color .15s, background .15s;
}
.btn-outline:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-lt); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 10px; border-radius: 7px;
  font-size: .8rem; color: var(--text-3);
  transition: color .15s, background .15s;
}
.btn-ghost:hover { color: var(--blue); background: var(--blue-lt); }
.btn-sm { padding: 7px 16px; font-size: .85rem; }

/* 工作区 */
.workspace { display: grid; grid-template-columns: 1fr 1px 1fr; min-height: 480px; }
.ws-left, .ws-right { padding: 24px; display: flex; flex-direction: column; gap: 14px; }
.ws-divider { background: var(--border); }
.ws-header { display: flex; align-items: center; justify-content: space-between; }
.ws-label { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--text-3); }
.remaining-badge {
  display: inline-flex; align-items: center; padding: 3px 10px;
  background: #fef9c3; color: #854d0e; border-radius: 99px;
  font-size: .75rem; font-weight: 600;
}
.preview-box {
  flex: 1; border: 1px solid var(--border); border-radius: var(--radius-sm);
  overflow: hidden; background: var(--bg-muted); min-height: 200px;
  display: flex; align-items: center; justify-content: center;
}
#previewImg { width: 100%; height: 100%; object-fit: contain; }

/* 加载 */
.loading-state { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; color: var(--text-2); font-size: .9rem; }
.loading-dots { display: flex; gap: 6px; }
.loading-dots span { width: 9px; height: 9px; border-radius: 50%; background: var(--blue); animation: dot-bounce .9s ease-in-out infinite; }
.loading-dots span:nth-child(2) { animation-delay: .15s; }
.loading-dots span:nth-child(3) { animation-delay:  .3s; }
@keyframes dot-bounce { 0%,80%,100% { transform: translateY(0); opacity: .5; } 40% { transform: translateY(-8px); opacity: 1; } }

/* 结果区 */
.result-state { display: flex; flex-direction: column; gap: 14px; flex: 1; }
.textarea-wrap { position: relative; flex: 1; }
#resultText {
  width: 100%; height: 100%; min-height: 200px;
  padding: 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: .9rem; line-height: 1.7; color: var(--text);
  resize: vertical; background: var(--bg-soft); transition: border-color .15s;
}
#resultText:focus { outline: none; border-color: var(--blue); background: var(--bg); }
.char-count { position: absolute; bottom: 8px; right: 10px; font-size: .72rem; color: var(--text-3); pointer-events: none; }

/* 翻译栏 */
.translate-bar {
  background: linear-gradient(135deg, #f5f3ff 0%, #eff6ff 100%);
  border: 1.5px solid #c4b5fd;
  border-radius: var(--radius-sm); padding: 14px 16px;
  display: flex; flex-direction: column; gap: 12px;
}
.translate-bar-header {
  display: flex; align-items: center; gap: 6px;
  font-size: .8rem; font-weight: 700; color: var(--violet);
  text-transform: uppercase; letter-spacing: .05em;
}
.translate-bar-header svg { opacity: .8; }
.lang-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.lang-label { font-size: .8rem; color: var(--text-3); flex-shrink: 0; }
.source-lang-badge {
  display: inline-flex; align-items: center; padding: 4px 12px;
  background: rgba(124,58,237,.1); color: var(--violet); border-radius: 99px;
  font-size: .78rem; font-weight: 600; border: 1px solid #ddd6fe;
}
.lang-arrow { color: var(--violet); flex-shrink: 0; opacity: .7; }
.target-lang-select {
  flex: 1; min-width: 150px; padding: 7px 12px;
  border: 1.5px solid #c4b5fd; border-radius: 8px;
  font-size: .875rem; font-family: inherit; color: var(--text);
  background: #fff; cursor: pointer; transition: border-color .15s;
  font-weight: 500;
}
.target-lang-select:focus { outline: none; border-color: var(--violet); box-shadow: 0 0 0 3px rgba(124,58,237,.12); }
/* 翻译主按钮 — 全宽、紫色、有分量 */
.btn-translate {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 11px 20px;
  background: linear-gradient(135deg, var(--violet) 0%, #4f46e5 100%);
  color: #fff; border-radius: 10px;
  font-size: .95rem; font-weight: 700;
  box-shadow: 0 4px 14px rgba(124,58,237,.35);
  transition: opacity .15s, transform .12s, box-shadow .15s;
  cursor: pointer; border: none;
}
.btn-translate:hover { opacity: .92; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(124,58,237,.42); }
.btn-translate:active { transform: translateY(0); }
.btn-translate:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.result-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.provider-hint { font-size: .75rem; color: var(--text-3); }

/* 错误区 */
.error-state { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; text-align: center; color: var(--text-2); }
.error-icon { color: #ef4444; }
.error-state p { font-size: .9rem; max-width: 30ch; }

/* ======= 使用场景 ======= */
.usecases-section { background: var(--bg); }
.usecases-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.usecase-card {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 20px;
  display: flex; flex-direction: column; gap: 10px;
  position: relative; transition: box-shadow .2s, transform .2s;
}
.usecase-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.uc-highlight { background: linear-gradient(135deg, #eff6ff 0%, #f5f3ff 100%); border-color: #c7d2fe; }
.uc-badge {
  display: inline-flex; align-items: center; padding: 3px 10px;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  color: #fff; border-radius: 99px; font-size: .7rem; font-weight: 700; width: fit-content; margin-bottom: 4px;
}
.uc-icon { font-size: 2rem; }
.usecase-card h3 { font-size: .95rem; font-weight: 700; color: var(--text); }
.usecase-card p  { font-size: .85rem; color: var(--text-2); line-height: 1.6; }

/* ======= 步骤 ======= */
.how-section { background: var(--bg-soft); }
.steps { display: flex; align-items: flex-start; justify-content: center; gap: 8px; }
.step { flex: 1; max-width: 280px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 12px; }
.step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  color: #fff; font-size: 1.1rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(37,99,235,.3); flex-shrink: 0;
}
.step h3 { font-size: .95rem; font-weight: 700; color: var(--text); }
.step p  { font-size: .85rem; color: var(--text-2); line-height: 1.6; }
.step-connector { flex-shrink: 0; margin-top: 24px; display: flex; align-items: center; }

/* ======= 页脚 ======= */
.footer { background: #0f172a; color: rgba(255,255,255,.6); font-size: .875rem; }
.footer-inner {
  max-width: 1180px; margin: 0 auto; padding: 48px 24px 36px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
}
.footer-brand { display: flex; flex-direction: column; gap: 10px; }
.footer-logo { font-size: 1.1rem; font-weight: 800; color: #fff; }
.footer-tagline { color: rgba(255,255,255,.45); font-size: .82rem; }
.footer-links-group { display: flex; gap: 48px; justify-content: flex-end; }
.footer-col { display: flex; flex-direction: column; gap: 8px; }
.footer-col-title { color: rgba(255,255,255,.85); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 4px; }
.footer-col a { color: rgba(255,255,255,.5); font-size: .85rem; transition: color .15s; }
.footer-col a:hover { color: rgba(255,255,255,.9); }
.footer-bottom {
  max-width: 1180px; margin: 0 auto; padding: 16px 24px;
  border-top: 1px solid rgba(255,255,255,.07);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: .78rem; color: rgba(255,255,255,.3);
}

/* ======= Auth 弹窗 ======= */

.auth-overlay {
  position: fixed; inset: 0;
  background: rgba(15,23,42,.45);
  z-index: 500;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.auth-modal {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 600;
  width: min(440px, calc(100vw - 32px));
  background: var(--bg);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,.18), 0 4px 16px rgba(0,0,0,.1);
  padding: 36px 32px 28px;
}

.auth-close {
  position: absolute; top: 14px; right: 14px;
  color: var(--text-3); border-radius: 8px;
  padding: 4px; transition: background .12s;
}
.auth-close:hover { background: var(--bg-muted); color: var(--text); }

.auth-logo {
  font-size: 1.1rem; font-weight: 800;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px; text-align: center;
}

.auth-tabs {
  display: flex; gap: 4px;
  background: var(--bg-muted); border-radius: 10px;
  padding: 3px; margin-bottom: 24px;
}
.auth-tab {
  flex: 1; padding: 7px; border-radius: 8px;
  font-size: .88rem; font-weight: 600; color: var(--text-3);
  transition: background .15s, color .15s;
}
.auth-tab--active {
  background: var(--bg); color: var(--text);
  box-shadow: var(--shadow-sm);
}

.auth-form { display: flex; flex-direction: column; gap: 4px; }
.auth-label { font-size: .78rem; font-weight: 600; color: var(--text-2); margin-top: 8px; }
.auth-input {
  width: 100%; padding: 10px 14px; margin-top: 2px;
  background: var(--bg-soft);
  border: 1.5px solid var(--border); border-radius: 10px;
  font-size: .93rem; color: var(--text);
  transition: border-color .15s;
  outline: none;
}
.auth-input:focus { border-color: var(--blue); background: var(--bg); }
.auth-error {
  min-height: 18px; font-size: .78rem; color: #dc2626;
  margin-top: 6px;
}
.auth-submit {
  width: 100%; padding: 11px; margin-top: 10px;
  font-size: .95rem; font-weight: 700;
  border-radius: 10px;
}
.auth-switch {
  text-align: center; font-size: .8rem; color: var(--text-3);
  margin-top: 12px; display: flex; gap: 4px; justify-content: center;
}
.auth-link {
  color: var(--blue); font-weight: 600; font-size: .8rem;
  text-decoration: underline; text-underline-offset: 2px;
}
.auth-link:hover { color: var(--violet); }
.auth-terms {
  text-align: center; font-size: .72rem; color: var(--text-3);
  margin-top: 20px; padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* Social Login 按钮 */
.auth-social { display: flex; flex-direction: column; gap: 10px; margin-bottom: 4px; }
.auth-social-btn {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 10px 16px; border: 1.5px solid var(--border); border-radius: 10px;
  background: var(--bg); color: var(--text); font-size: .88rem; font-weight: 600;
  cursor: pointer; transition: border-color .15s, box-shadow .15s;
  text-decoration: none;
}
.auth-social-btn:hover { border-color: var(--blue-mid); box-shadow: var(--shadow-sm); }
/* 第二行：小图标按钮 */
.auth-social-row { display: flex; gap: 10px; }
.auth-social-btn--icon {
  flex: 1; padding: 10px 0;
  border-radius: 10px; justify-content: center;
}

/* 分隔线 */
.auth-divider {
  display: flex; align-items: center; gap: 10px;
  margin: 16px 0 4px; color: var(--text-3); font-size: .75rem;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* 导航用户区 */
.nav-user-area {
  display: flex; align-items: center; gap: 8px;
}
.nav-user-email {
  font-size: .82rem; font-weight: 600; color: var(--text-2);
  max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.nav-logout {
  font-size: .78rem; color: var(--text-3); padding: 4px 10px;
  border-radius: 8px;
}
.nav-logout:hover { background: var(--bg-muted); color: var(--text); }

/* ======= 批量识别区（付费版）======= */
.batch-section { background: var(--bg-soft); }

.tier-badge-wrap { display: flex; justify-content: center; margin-bottom: 10px; }
.tier-badge {
  display: inline-block; padding: 4px 14px;
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  color: #fff; font-size: .72rem; font-weight: 700;
  border-radius: 100px; letter-spacing: .05em; text-transform: uppercase;
}

.batch-card {
  background: var(--bg); border-radius: var(--radius-lg);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow); overflow: hidden;
}

/* 拖拽区 */
.batch-drop {
  padding: 56px 32px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background .15s;
  outline: none;
}
.batch-drop:hover, .batch-drop:focus-visible { background: var(--bg-soft); }
.batch-drop.drag-over { background: var(--blue-lt); border: 2px dashed var(--blue); }
.batch-drop-content { display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; }
.batch-drop-icon { color: var(--text-3); margin-bottom: 4px; }
.batch-drop-main { font-size: 1rem; font-weight: 600; color: var(--text); }
.batch-drop-sub  { font-size: .82rem; color: var(--text-3); }

/* 文件队列 */
.batch-workspace { padding: 0; }

.batch-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-bottom: 1px solid var(--border);
}
.batch-count-label { font-size: .85rem; font-weight: 600; color: var(--text-2); }
.batch-toolbar-btns { display: flex; gap: 8px; }

.btn-ghost--danger { color: #dc2626; }
.btn-ghost--danger:hover { background: #fef2f2; color: #b91c1c; }

/* 文件列表 */
.batch-file-list { list-style: none; padding: 8px 0; max-height: 360px; overflow-y: auto; }

.bfi {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 20px; flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  transition: background .1s;
}
.bfi:last-child { border-bottom: none; }
.bfi:hover { background: var(--bg-soft); }

.bfi-type {
  flex-shrink: 0; font-size: .65rem; font-weight: 800;
  padding: 2px 7px; border-radius: 5px; letter-spacing: .04em;
}
.bfi-type--pdf { background: #fee2e2; color: #b91c1c; }
.bfi-type--img { background: var(--blue-lt); color: var(--blue); }

.bfi-name {
  flex: 1; min-width: 0;
  font-size: .85rem; color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.bfi-size { flex-shrink: 0; font-size: .75rem; color: var(--text-3); }

.bfi-status {
  flex-shrink: 0; font-size: .72rem; font-weight: 700;
  padding: 2px 9px; border-radius: 100px;
}
.bfi-s--pending    { background: var(--bg-muted); color: var(--text-3); }
.bfi-s--processing { background: #eff6ff; color: var(--blue); animation: pulse 1.2s ease-in-out infinite; }
.bfi-s--done       { background: #d1fae5; color: #065f46; }
.bfi-s--error      { background: #fee2e2; color: #b91c1c; }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .55; } }

.bfi-result {
  width: 100%; margin-top: 6px;
}
.bfi-text {
  width: 100%; height: 100px; padding: 8px 12px;
  font-size: .8rem; line-height: 1.55; resize: vertical;
  background: var(--bg-muted); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
}
.bfi-error-msg {
  width: 100%; margin-top: 4px;
  font-size: .78rem; color: #b91c1c; padding: 4px 0;
}

/* 操作行 */
.batch-actions-row {
  display: flex; gap: 12px; align-items: center;
  padding: 16px 20px; border-top: 1px solid var(--border);
}
.batch-note {
  padding: 0 20px 14px; font-size: .74rem; color: var(--text-3);
}

/* ======= RTL ======= */
[dir="rtl"] .nav-links { margin-left: 0; margin-right: auto; }
[dir="rtl"] .lang-dropdown { right: auto; left: 0; }
[dir="rtl"] .ws-header { flex-direction: row-reverse; }
[dir="rtl"] .lang-row  { flex-direction: row-reverse; }
[dir="rtl"] .lang-arrow { transform: scaleX(-1); }
[dir="rtl"] .footer-links-group { justify-content: flex-start; }

/* ======= 响应式 ======= */
@media (max-width: 960px) {
  .features-grid  { grid-template-columns: repeat(2, 1fr); }
  .usecases-grid  { grid-template-columns: repeat(2, 1fr); }
  .hero { grid-template-columns: 1fr; text-align: center; padding: 64px 0 64px; }
  .hero-inner { align-items: center; }
  .hero-sub { max-width: 60ch; }
  .hero-visual { display: none; }
  .badge { align-self: center; }
}
@media (max-width: 700px) {
  :root { --nav-h: 56px; }
  .nav-link-text { display: none; }
  .nav-links { gap: 6px; }
  .hero-wrap { padding: 0 20px; }
  .hero { padding: 48px 0 48px; gap: 28px; }
  .hero-h1 { font-size: 1.9rem; }
  .hero-sub { font-size: .95rem; }
  .hero-cta { justify-content: center; }
  .btn-hero-ghost { display: none; }
  .section-inner { padding: 56px 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .usecases-grid { grid-template-columns: 1fr; }
  .workspace { grid-template-columns: 1fr; grid-template-rows: auto 1px auto; }
  .ws-divider { width: 100%; height: 1px; }
  .steps { flex-direction: column; align-items: center; }
  .step-connector { transform: rotate(90deg); margin: 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .footer-links-group { justify-content: flex-start; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
}

/* ---- Phase 1：结构化结果渲染 ---- */
.result-rich {
  padding: 12px 16px; min-height: 160px;
  font-size: .92rem; line-height: 1.8; color: var(--text);
  overflow-y: auto;
}
.result-para { margin: 0 0 10px; white-space: pre-wrap; word-break: break-word; }
.result-para:last-child { margin-bottom: 0; }

/* 表格 */
.result-table-wrap { overflow-x: auto; margin: 8px 0 14px; border-radius: 8px; border: 1.5px solid var(--border); }
.result-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.result-table td {
  padding: 6px 12px; border: 1px solid var(--border);
  vertical-align: top; white-space: pre-wrap; word-break: break-word;
}
.result-table tr:nth-child(even) td { background: var(--bg-soft); }

/* 置信度高亮 */
.conf-uncertain {
  background: #fef9c3; color: #92400e;
  border-radius: 3px; padding: 0 2px;
  cursor: help;
  border-bottom: 1px dashed #d97706;
}
.conf-illegible {
  background: #fee2e2; color: #991b1b;
  border-radius: 3px; padding: 0 2px;
  font-style: italic;
}


/* ---- 共享导航扩展（nav.js 生成的元素） ---- */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1.5rem; height: 56px;
  background: #fff; border-bottom: 1px solid #e5e7eb;
  position: sticky; top: 0; z-index: 100;
}
.nav-logo {
  font-weight: 800; font-size: 1.05rem; color: #111827;
  text-decoration: none; letter-spacing: -.01em;
  display: flex; align-items: center; gap: 8px;
}
.nav-logo:hover { color: #4f46e5; }
.nav-right { display: flex; align-items: center; gap: .75rem; }
.nav-language select {
  appearance: none; border: 1px solid var(--border); border-radius: 7px;
  background: var(--bg-card); color: var(--text-2); cursor: pointer;
  font: inherit; font-size: .8rem; padding: .42rem 1.75rem .42rem .6rem;
}
.nav-language { position: relative; display: inline-flex; }
.nav-language::after {
  content: '⌄'; position: absolute; right: .55rem; top: 50%; transform: translateY(-55%);
  color: var(--text-3); pointer-events: none;
}
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-link { color: #374151; text-decoration: none; font-size: .9rem; display: flex; align-items: center; gap: .3rem; }
.nav-link:hover, .nav-link.active { color: #4f46e5; }
.nav-paid-tag {
  font-size: .62rem; font-weight: 700; background: #7c3aed; color: #fff;
  padding: .1rem .35rem; border-radius: 4px; vertical-align: middle;
}
.nav-login-btn { font-size: .875rem; }

/* 用户头像 + 下拉 */
.nav-user-menu { position: relative; }
.nav-avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: #6366f1; color: #fff; border: none;
  font-size: .95rem; font-weight: 700; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.nav-avatar:hover { background: #4f46e5; }
.nav-dropdown {
  position: absolute; right: 0; top: calc(100% + .5rem);
  background: #fff; border: 1px solid #e5e7eb; border-radius: 10px;
  min-width: 200px; box-shadow: 0 8px 32px rgba(0,0,0,.12);
  z-index: 200; padding: .5rem 0;
}
.nav-dropdown-email { padding: .4rem 1rem; font-size: .8rem; color: #374151; font-weight: 600; }
.nav-dropdown-tier  { padding: 0 1rem .4rem; font-size: .75rem; color: #9ca3af; }
.nav-dropdown-sep   { border: none; border-top: 1px solid #f3f4f6; margin: .25rem 0; }
.nav-dropdown-item  {
  display: block; padding: .5rem 1rem; font-size: .875rem; color: #374151;
  text-decoration: none; background: none; border: none; width: 100%;
  text-align: left; cursor: pointer;
}
.nav-dropdown-item:hover { background: #f3f4f6; color: #111827; }
.nav-logout { color: #dc2626 !important; }
.nav-logout:hover { background: #fff5f5 !important; }


/* ---- 首页工具区登录门槛 ---- */
.tool-gate {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(135deg, #f0f4ff 0%, #faf5ff 100%);
  border: 2px dashed #c7d2fe;
  border-radius: 16px;
}
.tool-gate-icon { font-size: 3rem; margin-bottom: 1rem; }
.tool-gate h3   { font-size: 1.4rem; margin: 0 0 .75rem; color: #1e1b4b; }
.tool-gate p    { color: #6b7280; max-width: 480px; margin: 0 auto 1.5rem; }
.tool-gate .btn-primary { font-size: 1rem; padding: .75rem 2rem; }
.tool-gate-features {
  margin-top: 1.25rem; display: flex; justify-content: center;
  align-items: center; gap: .5rem; font-size: .8rem; color: #9ca3af;
}