/* AI建站 · tool-site-v0 通用样式
   设计原则：浅色系（时空猫规范）、系统字体栈（禁用 Google Fonts，国内白屏教训）、零外部依赖、移动端优先 */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --text: #14181f;
  --text-2: #5b6472;
  --text-3: #8a93a3;
  --border: #e5e9f0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eff5ff;
  --green-soft: #e8f7ee;
  --green: #16794c;
  --gray-soft: #f0f2f6;
  --gray: #5b6472;
  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1060px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 14px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 58px; }
.logo { font-weight: 700; font-size: 1.05rem; color: var(--text); text-decoration: none; letter-spacing: .2px; }
.nav a { color: var(--text-2); text-decoration: none; margin-left: 22px; font-size: .92rem; }
.nav a:hover { color: var(--accent); }

/* ===== Hero ===== */
.hero { padding: 64px 0 36px; text-align: center; background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%); }
.hero h1 { margin: 0 0 12px; font-size: clamp(1.55rem, 4.2vw, 2.3rem); line-height: 1.3; letter-spacing: .3px; }
.hero .sub { margin: 0 auto 26px; max-width: 640px; color: var(--text-2); font-size: 1rem; }
.search-wrap { max-width: 520px; margin: 0 auto; }
#search {
  width: 100%; padding: 13px 18px; font-size: 1rem; color: var(--text);
  border: 1px solid var(--border); border-radius: 999px; outline: none;
  background: #fff; box-shadow: var(--shadow); transition: border-color .15s;
}
#search:focus { border-color: var(--accent); }

/* ===== 列表区 ===== */
.list-section { padding: 26px 20px 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.chip {
  padding: 7px 16px; font-size: .9rem; color: var(--text-2); cursor: pointer;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px;
  transition: all .15s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }

.card {
  display: flex; flex-direction: column;
  padding: 18px; background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 6px 22px rgba(16, 24, 40, .10); }
.card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.card h3 { margin: 0; font-size: 1.02rem; line-height: 1.45; }
.card p { margin: 8px 0 10px; color: var(--text-2); font-size: .9rem; flex: 1; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tags span { font-size: .76rem; color: var(--text-3); background: var(--bg-soft); border-radius: 6px; padding: 2px 8px; }
.card-link { font-size: .9rem; font-weight: 600; color: var(--accent); text-decoration: none; }
.card-link:hover { color: var(--accent-hover); }

.badge { flex: none; font-size: .74rem; padding: 2px 9px; border-radius: 999px; font-weight: 600; }
.badge-green { color: var(--green); background: var(--green-soft); }
.badge-blue { color: var(--accent); background: var(--accent-soft); }
.badge-gray { color: var(--gray); background: var(--gray-soft); }

.empty { text-align: center; color: var(--text-3); padding: 40px 0; }

/* ===== 关于 ===== */
.about { padding: 44px 20px 10px; }
.about h2 { font-size: 1.15rem; margin: 0 0 10px; }
.about p { color: var(--text-2); font-size: .92rem; margin: 0; }

/* ===== CTA 漏斗 ===== */
.cta { padding: 46px 20px 56px; }
.cta-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  background: linear-gradient(135deg, #eff5ff 0%, #f6f8fb 100%);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 30px;
}
.cta-text h2 { margin: 0 0 6px; font-size: 1.12rem; }
.cta-text p { margin: 0; color: var(--text-2); font-size: .92rem; }
.qr { border-radius: 10px; background: #fff; padding: 6px; border: 1px solid var(--border); }

/* ===== 页脚 ===== */
.site-footer { border-top: 1px solid var(--border); padding: 22px 0; background: var(--bg-soft); }
.site-footer p { margin: 0; font-size: .84rem; color: var(--text-2); }
.site-footer .muted { color: var(--text-3); margin-top: 4px; }

/* ===== 移动端 ===== */
@media (max-width: 640px) {
  .hero { padding: 44px 0 26px; }
  .cta-inner { flex-direction: column; text-align: center; }
  .grid { grid-template-columns: 1fr; }
}