/* Endfield 仓库转移辅助 - 介绍落地页
   沿用 Web UI 深色主题（--bg #0f172a / 强调 #38bdf8）保持品牌一致。 */
:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-hover: #334155;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent: #38bdf8;
  --accent-hover: #0ea5e9;
  --border: #334155;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ---------- 顶部 Hero ---------- */
.hero {
  padding: 48px 24px 40px;
  text-align: center;
  background: linear-gradient(180deg, #16233d 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 960px;
  margin: 0 auto 40px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 700; font-size: 17px; }

.version-badge {
  font-size: 12px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
}

.hero .sub {
  max-width: 620px;
  margin: 0 auto 28px;
  color: var(--text-secondary);
  font-size: 15px;
}

.actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  max-width: 420px;
  margin: 0 auto;
}

.hint {
  margin: 0 0 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 20px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: background 0.15s, transform 0.05s;
}

.btn.primary {
  background: var(--accent);
  color: #0f172a;
}
.btn.primary:hover { background: var(--accent-hover); }

.btn.ghost {
  background: var(--panel-hover);
  color: var(--text);
  opacity: 0.85;
}
.btn.ghost:hover { background: #475569; opacity: 1; }

.btn.link {
  background: none;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  width: auto;
  padding: 10px 18px;
  font-size: 13px;
}
.btn.link:hover { color: var(--accent); border-color: var(--accent); }

.btn.hidden { display: none; }
.btn.disabled { pointer-events: none; opacity: 0.5; }

/* ---------- 功能卡片 ---------- */
main { max-width: 960px; margin: 0 auto; padding: 48px 24px; }

.features h2,
.safety h2 {
  text-align: center;
  font-size: 22px;
  margin: 0 0 24px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

/* 核心功能固定单行 4 列（窄屏自动降列避免挤压） */
.grid.four { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 820px) {
  .grid.four { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 440px) {
  .grid.four { grid-template-columns: 1fr; }
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.card h3 { margin: 0 0 8px; font-size: 16px; color: var(--accent); }
.card p { margin: 0; font-size: 13px; color: var(--text-secondary); }

/* ---------- 安全透明说明 ---------- */
.safety {
  margin-top: 56px;
  padding: 32px 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, var(--panel) 0%, transparent 100%);
}

.safety h2 { margin-bottom: 8px; }

.safety .lead {
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 640px;
  margin: 0 auto 24px;
}

.safety .disclaimer {
  text-align: center;
  color: var(--text-secondary);
  font-size: 12px;
  margin: 24px 0 0;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ---------- 页脚 ---------- */
footer {
  text-align: center;
  padding: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 12px;
}
footer p { margin: 0; }

/* ---------- 响应式：窄屏时网格降列，避免卡片过挤 ---------- */
@media (max-width: 760px) {
  .grid.four, .grid.three { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .grid.four, .grid.three { grid-template-columns: 1fr; }
}