/* === AI小店 全局样式 === */
:root {
  /* 主色对齐主页 NEON 科技版 */
  --primary: #38bdf8;
  --primary-dark: #0ea5e9;
  --primary-light: rgba(56,189,248,.14);
  --accent: #22d3ee;
  --accent-light: rgba(34,211,238,.12);
  --success: #34d399;
  --success-light: rgba(52,211,153,.12);
  --warning: #fbbf24;
  /* gray 色阶反转 = 深色模式 */
  --gray-50: #070b16;
  --gray-100: #0b1224;
  --gray-200: rgba(148,163,184,.16);
  --gray-300: rgba(148,163,184,.28);
  --gray-400: #64748b;
  --gray-500: #7c8ba1;
  --gray-600: #94a3b8;
  --gray-700: #cbd5e1;
  --gray-800: #e2e8f0;
  --gray-900: #f1f5f9;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.4), 0 1px 2px rgba(0,0,0,.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,.45), 0 2px 4px rgba(0,0,0,.3);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.5), 0 4px 6px rgba(0,0,0,.3);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--gray-800);
  background: var(--gray-50);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

/* === Header === */
header {
  background: rgba(7,11,22,.78);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}
header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-900);
}
.logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
}
nav { display: flex; align-items: center; gap: 20px; }
nav a {
  font-size: 14px;
  color: var(--gray-600);
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all 0.2s;
}
nav a:hover { background: var(--gray-100); color: var(--gray-900); }

/* === 移动端汉堡菜单（2026-08-17 全站统一） === */
.nav-toggle{
  display:none;background:none;border:1px solid var(--gray-200);border-radius:8px;
  color:var(--gray-700);font-size:20px;line-height:1;padding:7px 11px;cursor:pointer;
  transition:all .2s;
}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary)}
@media (max-width:900px){
  .nav-toggle{display:block}
  header nav{
    position:fixed;top:60px;left:0;right:0;z-index:95;
    background:rgba(7,11,22,.97);backdrop-filter:blur(18px);
    flex-direction:column;align-items:stretch;gap:0;
    padding:8px 16px 16px;display:none;
    border-bottom:1px solid var(--gray-200);
    box-shadow:0 24px 48px rgba(0,0,0,.5);
    max-height:calc(100vh - 70px);overflow-y:auto;
  }
  header nav.open{display:flex}
  header nav a{padding:12px 14px;font-size:15px;border-bottom:1px solid rgba(148,163,184,.08);border-radius:0}
  header nav a:last-child{border-bottom:none}
  header nav .nav-cta{margin-left:0;text-align:center;border-bottom:none;margin-top:6px}
}

/* === Hero === */
.hero {
  text-align: center;
  padding: 60px 24px 48px;
  background: linear-gradient(135deg, #070b16 0%, #0b1224 50%, #16294d 100%);
}
.hero h1 {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}
.hero p {
  font-size: 18px;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto 24px;
}
.hero .badge {
  display: inline-block;
  background: var(--success-light);
  color: var(--success);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}

/* === Tools Grid === */
.tools-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px;
}
.tools-section h2 {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
}
.tools-section .subtitle {
  text-align: center;
  color: var(--gray-500);
  margin-bottom: 32px;
  font-size: 15px;
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--card-bg, #111b33);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: all 0.25s;
  cursor: pointer;
}
.tool-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.tool-card .icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 26px;
}
.tool-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.tool-card p { font-size: 13px; color: var(--gray-500); margin-bottom: 16px; line-height: 1.5; }
.tool-card .tag {
  display: inline-block;
  font-size: 11px; font-weight: 600;
  padding: 2px 10px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
}
.tool-card .tag.free { background: var(--success-light); color: var(--success); }

/* === Tool Page (通用) === */
.tool-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}
.tool-page .back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 24px;
  transition: color 0.2s;
}
.tool-page .back:hover { color: var(--primary); }
.tool-page h1 { font-size: 28px; font-weight: 700; margin-bottom: 6px; }
.tool-page .desc { color: var(--gray-500); margin-bottom: 28px; font-size: 15px; }

.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-group textarea,
.form-group input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  transition: border 0.2s;
  background: #0f1a2e;
}
.form-group textarea:focus,
.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
/* 原生控件深色适配（select/日期/滚动条等） */
select, input, textarea { color-scheme: dark; }
select {
  background: #0f1a2e;
  color: #e2e8f0;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
}
.form-group textarea { min-height: 140px; resize: vertical; }

.upload-zone {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--gray-50);
}
.upload-zone:hover { border-color: var(--primary); background: var(--primary-light); }
.upload-zone .icon { font-size: 36px; margin-bottom: 8px; }
.upload-zone p { font-size: 14px; color: var(--gray-500); }
.upload-zone .hint { font-size: 12px; color: var(--gray-400); margin-top: 4px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
}
.btn-primary:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-outline {
  background: #111b33;
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}
.btn-outline:hover { background: var(--gray-50); }

.result-box {
  margin-top: 28px;
  padding: 20px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: #111b33;
  display: none;
}
.result-box.visible { display: block; }
.result-box .label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.result-box .content {
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
  color: var(--gray-700);
}
/* Markdown 渲染后的排版（md-render.js） */
.result-box .content.md-rendered {
  white-space: normal;
}
.md-rendered h1, .md-rendered h2, .md-rendered h3, .md-rendered h4 {
  margin: 18px 0 8px;
  color: var(--gray-900);
  line-height: 1.4;
}
.md-rendered h1 { font-size: 19px; padding-bottom: 6px; border-bottom: 1px solid var(--gray-200); }
.md-rendered h2 { font-size: 17px; }
.md-rendered h3 { font-size: 15px; }
.md-rendered h4 { font-size: 14px; }
.md-rendered p { margin: 8px 0; }
.md-rendered ul, .md-rendered ol { margin: 8px 0; padding-left: 22px; }
.md-rendered li { margin: 4px 0; }
.md-rendered blockquote {
  margin: 10px 0;
  padding: 8px 14px;
  border-left: 3px solid var(--gray-300);
  background: var(--gray-50);
  color: var(--gray-600);
  border-radius: 0 8px 8px 0;
}
.md-rendered code {
  background: var(--gray-100);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.md-rendered pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 12px 14px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 10px 0;
  font-size: 13px;
  line-height: 1.6;
}
.md-rendered pre code { background: transparent; padding: 0; color: inherit; }
.md-rendered table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 13.5px;
}
.md-rendered th, .md-rendered td {
  border: 1px solid var(--gray-200);
  padding: 8px 10px;
  text-align: left;
}
.md-rendered th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-900);
}
.md-rendered hr { border: none; border-top: 1px solid var(--gray-200); margin: 16px 0; }
.md-rendered strong { color: var(--gray-900); }
.result-box .actions {
  margin-top: 16px;
  display: flex;
  gap: 10px;
}

.loading {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px;
  color: var(--gray-500);
}
.loading.visible { display: flex; }
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--gray-200);
  border-top: 2px solid var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* === Footer === */
footer {
  background: #0b1224;
  border-top: 1px solid var(--gray-200);
  padding: 24px;
  text-align: center;
  font-size: 13px;
  color: var(--gray-500);
}
footer a { color: var(--gray-500); }
footer a:hover { color: var(--gray-700); }

/* === Usage Counter === */
.usage-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--gray-100);
  border-radius: 8px;
  padding: 10px 16px;
  margin-bottom: 20px;
  font-size: 13px;
}
.usage-bar .count {
  font-weight: 600;
  color: var(--primary);
}
.usage-bar .free-text { color: var(--gray-500); }

/* === Responsive === */
@media (max-width: 640px) {
  .hero h1 { font-size: 28px; }
  .tools-grid { grid-template-columns: 1fr; }
  nav a { font-size: 12px; padding: 4px 8px; }
  header .container { padding: 10px 16px; }
}

/* === AI Content Watermark === */
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--gray-400);
  padding: 2px 8px;
  border: 1px solid var(--gray-200);
  border-radius: 4px;
}