/* 内容雷达官网 · 极简风（与插件同色系：黑白灰 + 蓝 #3B82F6） */
:root {
  --ink: #0f172a;
  --ink-muted: #475569;
  --ink-subtle: #94a3b8;
  --surface: #ffffff;
  --surface-muted: #f8fafc;
  --border: #e2e8f0;
  --brand: #3b82f6;
  --brand-soft: #eff6ff;
  --radius: 12px;
  --max: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--surface);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { opacity: 0.85; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* 顶栏 */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 17px; color: var(--ink); }
.logo .dot { width: 22px; height: 22px; border-radius: 7px; background: var(--ink); position: relative; }
.logo .dot::after { content: ""; position: absolute; width: 7px; height: 7px; border-radius: 50%; background: var(--brand); left: 50%; top: 50%; transform: translate(-50%, -50%); }
.nav-links { display: flex; gap: 26px; align-items: center; }
.nav-links a { color: var(--ink-muted); font-size: 14px; font-weight: 600; }
.nav-links a:hover { color: var(--ink); }
@media (max-width: 640px) { .nav-links a:not(.btn) { display: none; } }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--ink); color: #fff; font-weight: 700; font-size: 14px;
  padding: 9px 18px; border-radius: 8px; border: none; cursor: pointer;
  transition: opacity .15s;
}
.btn:hover { opacity: .9; color: #fff; }
.btn-ghost { background: var(--surface-muted); color: var(--ink); border: 1px solid var(--border); }

/* 主视觉 */
.hero { padding: 84px 0 64px; text-align: center; }
.badge {
  display: inline-block; font-size: 13px; font-weight: 700; color: var(--brand);
  background: var(--brand-soft); padding: 5px 13px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { font-size: 44px; line-height: 1.25; font-weight: 800; letter-spacing: -0.5px; }
.hero h1 .hl { color: var(--brand); }
.hero p.sub { margin: 20px auto 0; max-width: 640px; font-size: 18px; color: var(--ink-muted); }
.hero .cta { margin-top: 32px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero .btn { padding: 13px 26px; font-size: 15px; }
.hero .note { margin-top: 16px; font-size: 13px; color: var(--ink-subtle); }
@media (max-width: 640px) { .hero h1 { font-size: 32px; } .hero p.sub { font-size: 16px; } }

/* 区块 */
section { padding: 56px 0; }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 30px; font-weight: 800; letter-spacing: -0.3px; }
.section-head p { margin-top: 10px; color: var(--ink-muted); font-size: 16px; }

/* 功能卡 */
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
@media (max-width: 720px) { .grid { grid-template-columns: 1fr; } }
.card {
  background: var(--surface-muted); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px;
}
.card .ico { width: 42px; height: 42px; border-radius: 10px; background: var(--brand-soft); color: var(--brand); display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 14px; }
.card h3 { font-size: 18px; font-weight: 800; }
.card p { margin-top: 8px; color: var(--ink-muted); font-size: 14.5px; }

/* 安全条 */
.safe { background: var(--ink); color: #fff; border-radius: 16px; padding: 44px 40px; }
.safe h2 { font-size: 26px; font-weight: 800; }
.safe p { margin-top: 14px; color: #cbd5e1; font-size: 16px; max-width: 760px; }
.safe ul { margin-top: 18px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 28px; list-style: none; }
@media (max-width: 640px) { .safe ul { grid-template-columns: 1fr; } }
.safe li { color: #e2e8f0; font-size: 14.5px; padding-left: 24px; position: relative; }
.safe li::before { content: "✓"; position: absolute; left: 0; color: #60a5fa; font-weight: 800; }

/* 价格 */
.plans { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; max-width: 720px; margin: 0 auto; }
@media (max-width: 640px) { .plans { grid-template-columns: 1fr; } }
.plan { border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; background: #fff; }
.plan.pro { border-color: var(--brand); box-shadow: 0 12px 40px rgba(59, 130, 246, 0.12); position: relative; }
.plan .tag { position: absolute; top: -11px; right: 22px; background: var(--brand); color: #fff; font-size: 12px; font-weight: 700; padding: 3px 12px; border-radius: 999px; }
.plan h3 { font-size: 19px; font-weight: 800; }
.plan .price { margin: 12px 0 4px; font-size: 36px; font-weight: 800; }
.plan .price small { font-size: 15px; font-weight: 600; color: var(--ink-subtle); }
.plan ul { margin-top: 18px; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.plan li { font-size: 14.5px; color: var(--ink-muted); padding-left: 22px; position: relative; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 800; }

/* 安装步骤 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 720px) { .steps { grid-template-columns: 1fr; } }
.step { padding: 22px; border: 1px solid var(--border); border-radius: var(--radius); }
.step .n { width: 30px; height: 30px; border-radius: 50%; background: var(--ink); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 15px; margin-bottom: 12px; }
.step h4 { font-size: 16px; font-weight: 800; }
.step p { margin-top: 6px; color: var(--ink-muted); font-size: 14px; }

/* 页脚 */
footer { border-top: 1px solid var(--border); padding: 40px 0 56px; margin-top: 40px; }
footer .cols { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; }
footer .logo { font-size: 15px; }
footer .links { display: flex; gap: 22px; flex-wrap: wrap; }
footer .links a { color: var(--ink-muted); font-size: 14px; }
footer .meta { margin-top: 24px; color: var(--ink-subtle); font-size: 13px; line-height: 1.9; }
footer .meta a { color: var(--ink-subtle); }

/* 协议/隐私 正文 */
.doc { padding: 56px 0 40px; }
.doc h1 { font-size: 30px; font-weight: 800; }
.doc .updated { color: var(--ink-subtle); font-size: 14px; margin: 10px 0 32px; }
.doc h2 { font-size: 19px; font-weight: 800; margin: 30px 0 10px; }
.doc h3 { font-size: 16px; font-weight: 700; margin: 20px 0 8px; }
.doc p, .doc li { color: var(--ink-muted); font-size: 15px; margin: 8px 0; }
.doc ul, .doc ol { padding-left: 22px; }
.doc .back { display: inline-block; margin-bottom: 8px; font-size: 14px; font-weight: 600; }
.doc .tip { background: var(--surface-muted); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; font-size: 14px; color: var(--ink-muted); margin: 16px 0; }