/* 禹人专利助手营销站共享样式
 * 品牌基调配 App 端：深海军蓝 + 青色点缀；零依赖、无字体外链。
 * 四页共用（/ /features/ /pricing/ /faq/），改动时全页目检。 */
:root {
  --navy: #0b1b33;
  --navy-2: #122a4d;
  --ink: #1c2b3a;
  --muted: #5b6b7f;
  --cyan: #22d3ee;
  --cyan-dark: #0e7490;
  --bg-soft: #f4f7fb;
  --line: #e3e9f2;
  --maxw: 1080px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.7;
}
a { color: var(--cyan-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.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, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--navy); font-size: 17px; }
.brand img { width: 30px; height: 30px; border-radius: 6px; }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--muted); font-size: 15px; }
.nav-links a:hover { color: var(--navy); text-decoration: none; }
.btn {
  display: inline-block; border-radius: 8px; padding: 10px 22px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: none;
}
.btn-primary { background: linear-gradient(135deg, var(--cyan-dark), var(--cyan)); color: #04222b; }
.btn-primary:hover { text-decoration: none; filter: brightness(1.06); }
.btn-ghost { background: transparent; color: var(--cyan); border: 1px solid rgba(34, 211, 238, 0.45); }
.btn-hero { padding: 14px 34px; font-size: 17px; }

/* 首屏（深色科技风） */
.hero {
  background:
    radial-gradient(1200px 500px at 70% -10%, rgba(34, 211, 238, 0.18), transparent 60%),
    linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #eaf2fb;
  padding: 76px 0 84px;
}
.hero h1 { font-size: 40px; line-height: 1.3; color: #fff; letter-spacing: 0.5px; }
.hero .accent { color: var(--cyan); }
.hero p.lead { margin: 18px 0 30px; font-size: 17px; color: #b9c8dc; max-width: 640px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.hero-note { margin-top: 14px; font-size: 13px; color: #8fa6c6; }
.hero-note a { color: var(--cyan); }

/* 通用区块 */
section.block { padding: 64px 0; }
section.block.alt { background: var(--bg-soft); }
.block h2 { font-size: 28px; color: var(--navy); margin-bottom: 8px; }
.block h1 { font-size: 32px; color: var(--navy); margin-bottom: 8px; }
.block h1 + .sub { margin-bottom: 26px; }
.block .sub { color: var(--muted); margin-bottom: 36px; font-size: 16px; }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 24px 22px;
}
.card h3 { font-size: 17px; color: var(--navy); margin-bottom: 8px; }
.card p { font-size: 14.5px; color: var(--muted); }
.card .step-no { display: inline-flex; width: 28px; height: 28px; border-radius: 50%; align-items: center; justify-content: center; background: rgba(34, 211, 238, 0.14); color: var(--cyan-dark); font-weight: 700; font-size: 14px; margin-bottom: 10px; }

/* 表格 */
table.price { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; font-size: 15px; }
table.price th, table.price td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--line); }
table.price th { background: var(--bg-soft); color: var(--navy); }
table.price tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--line); padding: 6px 0; }
.faq-item h3 { font-size: 16.5px; color: var(--navy); margin: 14px 0 6px; }
.faq-item p { font-size: 15px; color: var(--muted); }

/* 行动区 */
.cta-band {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #eaf2fb; padding: 56px 0; text-align: center;
}
.cta-band h2 { color: #fff; font-size: 26px; margin-bottom: 10px; }
.cta-band p { color: #b9c8dc; margin-bottom: 26px; }

/* 页脚 */
.site-footer { background: var(--navy); color: #8fa6c6; padding: 36px 0; font-size: 13px; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 14px; }
.footer-links a { color: #b9c8dc; }
.footer-links a:hover { color: var(--cyan); }
.beian a { color: #6c80a0; margin-right: 12px; }

/* 面包屑 */
.crumbs { font-size: 13.5px; color: var(--muted); padding: 18px 0 0; }
.crumbs a { color: var(--muted); }

@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .nav-links a.nav-text { display: none; }
}