/* ===== SOHO GPT 样式 ===== */
:root {
  --navy: #1a1a2e;
  --teal: #00d4aa;
  --teal-dark: #00b392;
  --bg: #f5f5f5;
  --card: #ffffff;
  --text: #2b2b3a;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
}

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

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

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
a { color: inherit; text-decoration: none; }

/* ----- 头部导航 ----- */
.site-header {
  background: var(--navy);
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,.25);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { font-size: 22px; font-weight: 800; color: #fff; letter-spacing: .5px; }
.logo span { color: var(--teal); margin-left: 4px; }
.main-nav { display: flex; gap: 26px; }
.main-nav a { color: #cbd5e1; font-size: 15px; transition: color .2s; }
.main-nav a:hover { color: var(--teal); }
.nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 22px; cursor: pointer; }

/* ----- Hero ----- */
.hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 60%, #0f3460 100%);
  color: #fff; text-align: center; padding: 96px 20px 88px;
}
.hero h1 { font-size: 40px; font-weight: 800; letter-spacing: 1px; margin-bottom: 16px; }
.hero-sub { font-size: 18px; color: #a8c5d6; margin-bottom: 36px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ----- 按钮 ----- */
.btn {
  display: inline-block; padding: 12px 30px; border-radius: 8px;
  font-size: 16px; font-weight: 600; cursor: pointer; border: none;
  transition: transform .15s, box-shadow .15s, background .2s;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--teal); color: var(--navy); box-shadow: 0 4px 16px rgba(0,212,170,.35); }
.btn-primary:hover { background: var(--teal-dark); }
.btn-outline { background: transparent; color: var(--teal); border: 1.5px solid var(--teal); }
.btn-outline:hover { background: rgba(0,212,170,.1); }
.btn-block { width: 100%; }
.btn-small { padding: 6px 16px; font-size: 13px; background: var(--navy); color: #fff; }
.btn-small:hover { background: #2a2a45; }
.btn[disabled] { opacity: .6; cursor: not-allowed; }

/* ----- 区块 ----- */
.section { padding: 72px 0; }
.section-alt { background: #eceef1; }
.section-title { font-size: 28px; text-align: center; margin-bottom: 8px; }
.section-sub { text-align: center; color: var(--text-light); margin-bottom: 44px; }

/* ----- 卡片 ----- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: var(--card); border-radius: var(--radius);
  padding: 28px; box-shadow: 0 2px 10px rgba(0,0,0,.06);
  border: 1px solid var(--border);
}
.tool-card { display: block; transition: transform .2s, box-shadow .2s; }
.tool-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,.1); }
.tool-card h3 { margin: 12px 0 6px; font-size: 19px; }
.tool-card p { color: var(--text-light); font-size: 14px; margin-bottom: 14px; }
.tool-icon { font-size: 34px; }
.tool-icon.big { font-size: 44px; }
.card-link { color: var(--teal-dark); font-weight: 600; font-size: 14px; }

/* ----- 步骤 ----- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step { text-align: center; padding: 20px; }
.step-num {
  width: 52px; height: 52px; margin: 0 auto 14px; border-radius: 50%;
  background: var(--navy); color: var(--teal);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 800;
}
.step h3 { margin-bottom: 6px; }
.step p { color: var(--text-light); font-size: 14px; }

/* ----- CTA 面板 ----- */
.cta-panel {
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  color: #fff; text-align: center; border-radius: var(--radius);
  padding: 56px 24px;
}
.cta-panel h2 { margin-bottom: 10px; }
.cta-panel p { color: #a8c5d6; margin-bottom: 26px; }

/* ----- 工具页 ----- */
.tool-page { max-width: 860px; }
.tool-head { display: flex; align-items: center; gap: 18px; margin-bottom: 28px; }
.tool-head h1 { font-size: 26px; }
.tool-short { color: var(--text-light); }
.tool-body { display: grid; gap: 24px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
.field label em { color: #e11d48; font-style: normal; margin-left: 2px; }
.field input, .field textarea {
  width: 100%; padding: 11px 14px; border: 1.5px solid var(--border);
  border-radius: 8px; font-size: 15px; font-family: inherit;
  background: #fafafa; transition: border-color .2s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--teal); background: #fff; }
.form-tip { text-align: center; font-size: 12px; color: var(--text-light); margin-top: 12px; }

.result-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.result-head h2 { font-size: 20px; }
.result-actions { display: flex; gap: 10px; }
.result-loading { text-align: center; padding: 40px 0; color: var(--text-light); }
.spinner {
  width: 36px; height: 36px; margin: 0 auto 14px; border-radius: 50%;
  border: 4px solid var(--border); border-top-color: var(--teal);
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.result-disclaimer { margin-top: 16px; font-size: 12px; color: var(--text-light); border-top: 1px dashed var(--border); padding-top: 12px; }

/* ----- Markdown 渲染 ----- */
.markdown-body h1 { font-size: 22px; margin: 18px 0 10px; }
.markdown-body h2 { font-size: 18px; margin: 20px 0 8px; color: var(--navy); }
.markdown-body h3 { font-size: 16px; margin: 16px 0 6px; }
.markdown-body p { margin: 8px 0; font-size: 15px; }
.markdown-body ul, .markdown-body ol { margin: 8px 0 8px 22px; font-size: 15px; }
.markdown-body li { margin: 4px 0; }
.markdown-body strong { color: var(--navy); }
.markdown-body table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 14px; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
.markdown-body th { background: #f0f1f3; }
.markdown-body hr { border: none; border-top: 1px dashed var(--border); margin: 16px 0; }
.markdown-body em { color: var(--text-light); }

/* ----- 文章页 ----- */
.article { max-width: 760px; }
.article h1 { font-size: 28px; margin-bottom: 6px; }
.article-sub { color: var(--text-light); margin-bottom: 36px; }
.article h2 { font-size: 20px; margin: 34px 0 12px; color: var(--navy); }
.article p { margin: 10px 0; }
.article ul { margin: 10px 0 10px 22px; }
.article li { margin: 6px 0; }

/* ----- 示例页 ----- */
.example-tabs { display: flex; gap: 12px; margin-bottom: 20px; }
.tab-btn {
  padding: 8px 22px; border-radius: 999px; border: 1.5px solid var(--border);
  background: #fff; cursor: pointer; font-size: 14px; font-weight: 600;
  transition: all .2s;
}
.tab-btn.active { background: var(--navy); color: var(--teal); border-color: var(--navy); }
.example-panel { white-space: pre-wrap; }
.example-panel.rendered { white-space: normal; }

/* ----- 404 ----- */
.not-found { text-align: center; padding: 120px 0; }
.not-found h1 { font-size: 72px; color: var(--navy); }
.not-found p { color: var(--text-light); margin: 12px 0 28px; }

/* ----- 页脚 ----- */
.site-footer { background: var(--navy); color: #94a3b8; margin-top: 40px; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px;
  padding: 48px 0 32px;
}
.footer-logo { margin-bottom: 10px; }
.footer-slogan { font-size: 14px; color: #a8c5d6; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 12px; }
.site-footer a { display: block; font-size: 14px; margin: 8px 0; transition: color .2s; }
.site-footer a:hover { color: var(--teal); }
.footer-compliance {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0 28px; font-size: 12px; color: #7d8aa0; text-align: center;
}
.footer-compliance p { margin: 4px 0; }

/* ----- 响应式 ----- */
@media (max-width: 768px) {
  .hero h1 { font-size: 28px; }
  .card-grid, .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 20px; }
  .main-nav {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    background: var(--navy); flex-direction: column; gap: 0;
    padding: 10px 20px 20px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; border-top: 1px solid rgba(255,255,255,.08); }
  .nav-toggle { display: block; }
  .section { padding: 48px 0; }
}