/* ============================================================
   39VPN · ai-tools.html 专属样式
   工具卡网格 / 暗区原则面板 / 表格注脚 / 暗区描边按钮
   ============================================================ */

/* 首屏:无装置区,补足底部留白 */
.ai-hero .hero-inner{padding-bottom:64px}

/* ============ 工具卡网格 ============ */
.tools-lead{margin-top:10px}
.tool-grid{margin-top:26px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tool-grid > *{min-width:0}
.tool-card{display:flex;flex-direction:column;gap:14px;padding:22px;border:1px solid var(--border);border-radius:var(--radius-xl);background:var(--bg);box-shadow:var(--shadow-card)}
.tool-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;flex-wrap:wrap}
.tool-name{font-size:17px;font-weight:800;letter-spacing:-.01em}
.tool-vendor{font-family:var(--font-mono);font-size:11px;color:var(--muted);letter-spacing:.03em}
.tool-points{display:grid;gap:9px;font-size:13.5px;line-height:1.65;color:var(--muted)}
.tool-points li{display:flex;align-items:flex-start;gap:9px}
.tool-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex-shrink:0;margin-top:8px}

/* ============ 对照表注脚 ============ */
.table-note{margin-top:14px;font-size:13.5px;color:var(--muted)}
.table-note a{color:var(--accent);font-weight:600}

/* ============ 暗区三原则面板 ============ */
.rule-grid{margin-top:28px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.rule-grid > *{min-width:0}
.rule-panel h3{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800}
.rule-panel p{margin-top:12px;font-size:13.5px;line-height:1.75}
.rule-links{margin-top:26px;display:flex;flex-wrap:wrap;gap:14px}
.rule-note{margin-top:16px;font-size:13px}

/* 暗区描边按钮 */
.btn-ghost-dark{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 26px;border:1.5px solid var(--deep-line);border-radius:var(--radius-pill);color:var(--deep-text);font-size:14.5px;font-weight:600;transition:border-color .15s,transform .15s}
.btn-ghost-dark:hover{border-color:var(--deep-muted);transform:translateY(-1px)}
.btn-ghost-dark svg{display:block;flex-shrink:0}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .tool-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .tool-grid{grid-template-columns:1fr}
  .rule-grid{grid-template-columns:1fr}
  .ai-hero .hero-inner{padding-bottom:48px}
}