/* 火狼工具站 - 全局样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #e74c3c;
  --primary-dark: #c0392b;
  --secondary: #2c3e50;
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --border: #e0e0e0;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
}

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}

/* === 导航栏 === */
header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  height: 60px;
  gap: 30px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--primary);
  font-size: 20px;
  font-weight: 700;
}

.logo-icon { font-size: 28px; }

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
  margin-left: auto;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-size: 15px;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.nav-links a:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* === 主容器 === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 30px 20px;
}

/* === Hero区 === */
.hero {
  background: linear-gradient(135deg, var(--primary), #c0392b);
  color: white;
  padding: 60px 20px;
  text-align: center;
  border-radius: var(--radius);
  margin-bottom: 40px;
}

.hero h1 {
  font-size: 36px;
  margin-bottom: 12px;
}

.hero p {
  font-size: 18px;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 24px;
}

.hero-search {
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  gap: 8px;
}

.hero-search input {
  flex: 1;
  padding: 12px 16px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  outline: none;
}

/* === 工具分类 === */
.section-title {
  font-size: 24px;
  margin-bottom: 20px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
  color: var(--secondary);
}

.category {
  margin-bottom: 40px;
}

.category-desc {
  color: var(--text-light);
  margin-bottom: 16px;
  font-size: 14px;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.tool-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid transparent;
}

.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
  border-color: var(--primary);
}

.tool-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.tool-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.tool-card p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.5;
}

/* === 工具页面 === */
.tool-page {
  max-width: 800px;
  margin: 0 auto;
}

.tool-header {
  text-align: center;
  padding: 40px 0 30px;
}

.tool-header h1 {
  font-size: 30px;
  margin-bottom: 10px;
}

.tool-header p {
  color: var(--text-light);
  font-size: 16px;
}

.tool-input-group {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.input-row {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.input-group {
  flex: 1;
  min-width: 150px;
}

.input-group label {
  display: block;
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 6px;
}

.input-group input, .input-group select, .input-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 16px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.input-group input:focus, .input-group textarea:focus {
  border-color: var(--primary);
}

.result-box {
  background: linear-gradient(135deg, #2c3e50, #1a252f);
  color: white;
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.result-value {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 8px;
}

.result-label {
  font-size: 14px;
  opacity: 0.7;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: white;
  border: none;
  padding: 12px 32px;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.2s;
  font-family: inherit;
  text-decoration: none;
}

.btn:hover { background: var(--primary-dark); }

/* === 信息页面 === */
.info-page {
  max-width: 800px;
  margin: 0 auto;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 50px 40px;
  box-shadow: var(--shadow);
}

.info-page h1 {
  font-size: 28px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--primary);
}

.info-page h2 {
  font-size: 20px;
  margin: 30px 0 12px;
  color: var(--secondary);
}

.info-page p {
  margin-bottom: 14px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
}

.info-page ul {
  margin: 10px 0 16px 24px;
}

.info-page li {
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.7;
}

/* === Footer === */
footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.6);
  padding: 30px 20px;
  margin-top: 60px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-links a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.footer-links a:hover { color: white; }

.footer-copy {
  font-size: 14px;
}

/* === 响应式 === */
@media (max-width: 768px) {
  .hero h1 { font-size: 26px; }
  .tools-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .info-page { padding: 30px 20px; }
  .nav-links { gap: 16px; }
  .footer-inner { flex-direction: column; text-align: center; }
}