/* 做个样子 JustForShow 官网样式 —— 白卡片风格，与应用界面一致
   品牌橙 #E8833A（取自应用界面主按钮/品牌图标）· 系统字体栈 · 零外部资源 */
:root {
  --ink: #2b2f36; --sub: #6b7280; --line: #e6e8ec; --bg: #f6f7f9;
  --accent: #e8833a; --accent-d: #d06e28; --accent-bg: #fdf3ea;
  --ok: #2f7d42; --card: #ffffff;
}
* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }
body {
  color: var(--ink); background: var(--bg); line-height: 1.75; font-size: 16px;
  font-family: "Microsoft YaHei UI", "Segoe UI", system-ui, -apple-system, sans-serif;
}
a { color: var(--accent-d); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
nav {
  position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.94);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 20px; height: 60px; }
.brand { font-size: 19px; font-weight: 700; color: var(--ink);
  display: inline-flex; align-items: center; gap: 9px; }
.brand img { height: 30px; width: 30px; display: block; }
.brand .dot { color: var(--accent); }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 18px; font-size: 14px; }
.nav-links a { color: var(--sub); }
.lang-switch { border-left: 1px solid var(--line); padding-left: 18px; }
.lang-switch b { color: var(--ink); }

/* ---------- Hero（方形 logo 紧凑布局 + 品牌橙微光） ---------- */
.hero { padding: 48px 0 8px; }
.hero-card {
  background:
    radial-gradient(58% 46% at 50% 0%, rgba(232, 131, 58, .07), transparent 72%),
    linear-gradient(135deg, #FEFEFE 0%, #F4F6F9 52%, #ECEFF4 100%);
  border: 1px solid #EEF0F4; border-radius: 18px;
  padding: 36px 40px 40px; text-align: center;
  box-shadow: 0 2px 14px rgba(43, 47, 54, .04);
}
.hero-head {
  display: flex; align-items: center; justify-content: center;
  gap: 20px; margin-bottom: 18px; text-align: left;
}
.hero-logo {
  width: 80px; height: 80px; border-radius: 18px;
  box-shadow: 0 4px 16px rgba(232, 131, 58, .15);
}
.hero-name { font-size: 32px; line-height: 1.2; margin: 0; }
.hero-name .en-name { color: var(--sub); font-size: 22px; font-weight: 500; }
.hero-slogan { font-size: 16px; color: var(--sub); margin: 4px 0 0; }
.hero h1 { font-size: 32px; line-height: 1.3; margin-bottom: 12px; }
.hero h1 .key { color: var(--accent); }
.hero p.pitch { font-size: 17.5px; margin-bottom: 6px; }
.hero p.sub { font-size: 15px; color: var(--sub); }
.platform-pills { display: flex; gap: 10px; margin: 22px 0 26px; flex-wrap: wrap; justify-content: center; }
.pill {
  font-size: 13px; padding: 4px 14px; border-radius: 16px;
  background: #fff; border: 1px solid var(--line); color: var(--ink);
}
.pill.hot { background: var(--accent); border-color: var(--accent-d); color: #fff; font-weight: 600; }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 30px;
  border-radius: 8px; font-size: 16px; font-weight: 600; border: none;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-d); text-decoration: none; }
.btn-ghost {
  background: #fff; color: var(--accent-d); border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--accent); text-decoration: none; }
.btn svg { flex: none; }

/* ---------- 公测提示条 ---------- */
.beta-note {
  margin: 22px auto 0; max-width: 1080px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: center;
  background: var(--accent-bg); border: 1px solid #f3d9bd; border-radius: 12px;
  padding: 12px 22px; font-size: 14.5px; color: var(--ink); text-align: center;
}
.beta-note b { color: var(--accent-d); }
.beta-note .tag {
  font-size: 12.5px; font-weight: 700; color: #fff; background: var(--accent);
  border-radius: 12px; padding: 2px 12px;
}

/* ---------- 通用区块 ---------- */
section.block { padding: 56px 0 8px; }
h2.title { font-size: 27px; margin-bottom: 8px; color: var(--ink); }
h2.title::after {
  content: ""; display: block; width: 46px; height: 4px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), #f5b47e); margin-top: 10px;
}
p.lead { color: var(--sub); max-width: 720px; margin-bottom: 26px; }

/* ---------- 支持格式芯片 ---------- */
.fmt-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.fmt-chips span {
  font-size: 13.5px; font-weight: 600; padding: 6px 16px; border-radius: 9px;
  background: #fff; border: 1px solid var(--line); color: var(--ink);
}
.fmt-chips span small { font-weight: 400; color: var(--sub); margin-left: 6px; }
.fmt-chips span.dim { border-style: dashed; color: var(--sub); background: transparent; }
.fmt-chips span.dim small { color: #a5adb8; }

/* ---------- 功能网格（白卡片） ---------- */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feat {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 22px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.feat:hover {
  transform: translateY(-4px); border-color: #f3d9bd;
  box-shadow: 0 12px 28px rgba(43,47,54,.10);
}
.feat .ico {
  width: 46px; height: 46px; border-radius: 12px; display: flex;
  align-items: center; justify-content: center; margin-bottom: 14px;
  background: var(--accent-bg); color: var(--accent-d); border: 1px solid #f3d9bd;
}
.feat h3 { font-size: 16px; margin-bottom: 6px; }
.feat p { font-size: 14px; color: var(--sub); }

/* ---------- 下载区 ---------- */
.download-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 34px 30px; text-align: center;
  box-shadow: 0 2px 14px rgba(43,47,54,.05);
}
.download-card .big-btn { font-size: 17px; padding: 15px 36px; }
.download-note { font-size: 13.5px; color: var(--sub); margin-top: 14px; }

/* ---------- 截图占位 ---------- */
.shot {
  width: 100%; max-width: 1160px; margin: 18px auto 0;
  border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  box-shadow: 0 10px 34px rgba(43, 47, 54, .10);
}
.shot img { display: block; width: 100%; height: auto; }

/* ---------- 页脚 ---------- */
footer { border-top: 1px solid var(--line); margin-top: 64px; padding: 30px 0 44px;
  color: var(--sub); font-size: 13.5px; background: #fff; }
footer .cols { display: flex; gap: 40px; flex-wrap: wrap; }
footer h4 { color: var(--accent-d); font-size: 14px; margin-bottom: 8px; }
footer ul { list-style: none; padding: 0; }
footer li { margin: 4px 0; }
footer .legal { margin-top: 24px; color: #8a8f98; }

/* ---------- 隐私政策页 ---------- */
.page { max-width: 860px; margin: 0 auto; padding: 40px 28px 64px; }
.page header { border-bottom: 3px solid var(--accent); padding-bottom: 18px; margin-bottom: 22px; }
.page header h1 { margin: 0 0 6px; font-size: 25px; }
.page header .date { color: var(--sub); font-size: 14px; }
.page .back { font-size: 14px; margin-bottom: 20px; }
.page .back a { color: var(--sub); }
.page .back a:hover { color: var(--accent-d); }
.langs { margin: 0 0 22px; }
.langs a { display: inline-block; padding: 5px 16px; margin-right: 8px; border: 1px solid var(--line);
  border-radius: 18px; color: var(--accent-d); background: #fff; font-size: 14px; }
.langs a:hover { background: var(--accent-bg); text-decoration: none; }
.doc section {
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 22px 26px; margin-bottom: 18px;
}
.doc h2 { font-size: 18px; margin: 0 0 12px; color: var(--accent-d); }
.doc ul { padding-left: 22px; margin: 8px 0; }
.doc li { margin: 5px 0; }
.doc .contact { font-size: 15.5px; }
.page footer { text-align: center; color: var(--sub); font-size: 13px; margin-top: 30px;
  border-top: none; padding: 0; background: transparent; }

/* ---------- 响应式 ---------- */
@media (max-width: 820px) {
  .feat-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 27px; }
  .hero-head { flex-direction: column; text-align: center; gap: 12px; }
  .hero-card { padding: 30px 20px 30px; }
  .nav-links a.hide-sm { display: none; }
}

/* ---------- 请作者喝咖啡（参照 PassGone 鸡腿模式） ---------- */
.sponsor {
  text-align: center; padding: 28px 20px 20px; margin-top: 28px;
  border-top: 1px solid var(--line);
}
.sponsor h3 { font-size: 18px; margin-bottom: 6px; }
.sponsor p { font-size: 14px; color: var(--sub); }
.coffee-btn {
  background: none; border: none; cursor: pointer;
  display: inline-block; font: inherit; line-height: 1;
  padding: 0 0 0 6px; vertical-align: -6px;
  transform: scale(1.4); transform-origin: center;
  animation: coffee-bounce 2s ease-in-out infinite;
}
@keyframes coffee-bounce {
  0%, 14%, 28%, 100% { transform: scale(1.4) translateY(0); }
  7%                 { transform: scale(1.4) translateY(-3px); }
  21%                { transform: scale(1.4) translateY(-3px); }
}
.qr-modal {
  display: none; position: fixed; inset: 0; z-index: 999;
  background: rgba(0,0,0,.55); align-items: center; justify-content: center;
}
.qr-card {
  position: relative; background: #fff; border-radius: 16px;
  padding: 24px 28px 18px; text-align: center;
  box-shadow: 0 8px 40px rgba(0,0,0,.25);
}
.qr-card img { width: 220px; height: auto; border-radius: 8px; }
.qr-card span { display: block; margin-top: 10px; font-size: 14px; color: var(--ink); }
.qr-card button {
  position: absolute; top: 6px; right: 8px; border: none;
  background: none; font-size: 16px; cursor: pointer; color: var(--sub);
}