/* Rustally 官网样式 · 品牌夜航青 */
:root {
  --accent: #0891B2;
  --accent-strong: #0E7490;
  --accent-soft: #E0F5F9;
  --ink: #1C1917;
  --ink-2: #44403C;
  --ink-3: #78716C;
  --bg: #EFEDE8;
  --panel: #F7F5F1;
  --card: #FDFCFA;
  --line: #E2DFD8;
}

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

html { scroll-behavior: smooth; }

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

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---- 导航 ---- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(247, 245, 241, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-logo { width: 32px; height: 32px; border-radius: 8px; }
.brand-name { font-size: 20px; font-weight: 700; letter-spacing: 0.5px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--ink-2); text-decoration: none; font-size: 15px; }
.nav-links a:hover { color: var(--accent); }

/* ---- Hero ---- */
.hero { padding: 80px 0 60px; }
.hero-inner { display: flex; align-items: center; gap: 48px; }
.hero-text { flex: 1; }
.eyebrow {
  color: var(--accent); font-size: 14px; font-weight: 600;
  letter-spacing: 2px; margin-bottom: 12px;
}
.hero h1 { font-size: 48px; line-height: 1.2; font-weight: 800; }
.hero .accent { color: var(--accent); }
.hero-sub { margin: 20px 0 28px; font-size: 17px; color: var(--ink-2); max-width: 520px; }
.hero-actions { display: flex; gap: 14px; }
.hero-meta { margin-top: 14px; font-size: 13px; color: var(--ink-3); }
.hero-art { flex-shrink: 0; }
.hero-logo { width: 220px; height: 220px; border-radius: 32px; box-shadow: 0 20px 60px rgba(8, 145, 178, 0.18); }

/* ---- 按钮 ---- */
.btn {
  display: inline-block; padding: 12px 28px; border-radius: 10px;
  font-size: 15px; font-weight: 600; text-decoration: none; transition: all 0.2s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-strong); }
.btn-ghost { border: 1.5px solid var(--line); color: var(--ink); background: var(--card); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-block { display: block; text-align: center; width: 100%; }

/* ---- 区块 ---- */
section { padding: 64px 0; }
.section-title { font-size: 30px; font-weight: 700; text-align: center; margin-bottom: 40px; }

/* ---- 功能卡片 ---- */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 26px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.07); }
.card-icon { font-size: 30px; margin-bottom: 12px; }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--ink-2); }

/* ---- 下载 ---- */
.download-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 40px; max-width: 560px; margin: 0 auto; text-align: center;
}
.download-head h2 { font-size: 26px; margin-bottom: 24px; }
.spec-list { list-style: none; margin-bottom: 24px; text-align: left; }
.spec-list li {
  display: flex; justify-content: space-between; padding: 10px 0;
  border-bottom: 1px dashed var(--line); font-size: 14px;
}
.spec-list span { color: var(--ink-3); }
.download-note { margin-top: 14px; font-size: 13px; color: var(--ink-3); }

/* ---- 开通演示（客户端 #video 锚点落地区） ---- */
.video-inner {
  display: grid; grid-template-columns: 1.5fr 1fr; gap: 24px; align-items: start;
}
.video-frame {
  position: relative; aspect-ratio: 16 / 9; border-radius: 16px;
  background: linear-gradient(135deg, var(--accent-soft), var(--card));
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
}
.video-placeholder { text-align: center; padding: 28px; }
.video-badge {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  background: var(--accent); color: #fff; font-size: 12px; font-weight: 600;
  letter-spacing: 0.5px;
}
.video-placeholder p {
  margin: 14px 0 18px; font-size: 14px; color: var(--ink-2); line-height: 1.8;
}
.video-steps { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.video-steps li {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px 20px;
}
.video-steps b { display: block; font-size: 15px; margin-bottom: 4px; }
.video-steps span { font-size: 13px; color: var(--ink-2); }

/* ---- FAQ ---- */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 16px 20px; margin-bottom: 12px;
}
.faq-item summary { font-weight: 600; cursor: pointer; font-size: 15px; }
.faq-item p { margin-top: 10px; font-size: 14px; color: var(--ink-2); }

/* ---- 页脚 ---- */
.footer {
  border-top: 1px solid var(--line); background: var(--panel);
  padding: 36px 0 28px; text-align: center; font-size: 13px; color: var(--ink-3);
}
.footer a { color: var(--ink-2); text-decoration: none; }
.footer a:hover { color: var(--accent); }
.footer-sub { margin-top: 8px; }
.beian { margin-top: 12px; }

/* ---- 联系页 ---- */
.page-body { padding: 48px 0 64px; }
.page-body h1 { font-size: 32px; margin-bottom: 24px; }
.page-body h2 { font-size: 20px; margin: 28px 0 12px; }
.page-body p, .page-body li { color: var(--ink-2); font-size: 15px; margin-bottom: 10px; }
.page-body ul { padding-left: 22px; }

/* ---- 响应式 ---- */
@media (max-width: 860px) {
  .hero-inner { flex-direction: column; text-align: center; }
  .hero-text { order: 1; }
  .hero-art { display: none; }
  .hero h1 { font-size: 34px; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .feature-grid { grid-template-columns: 1fr; }
  .video-inner { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; }
}