:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --ink: #1f2933;
  --muted: #66707a;
  --primary: #2563eb;
  --accent: #16a34a;
  --kofi: #ff5e5b;
  --border: #e3e8ef;
  --shadow: 0 6px 24px rgba(31, 41, 51, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

.hero {
  background: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  color: #fff;
  padding: 48px 20px 40px;
  text-align: center;
}
.hero-inner { max-width: 720px; margin: 0 auto; }
.hero h1 { font-size: 38px; margin: 0 0 8px; letter-spacing: 1px; }
.tagline { font-size: 17px; opacity: 0.95; margin: 0 0 12px; }
.sub { font-size: 14px; opacity: 0.9; margin: 0; }
.sub strong { color: #ffe27a; }

.container { max-width: 920px; margin: 0 auto; padding: 28px 20px 60px; }

.ad-slot {
  background: #eef1f6;
  border: 1px dashed #c3ccd8;
  border-radius: 10px;
  text-align: center;
  color: var(--muted);
  padding: 18px;
  margin: 18px 0;
  font-size: 13px;
}

.uploader {
  border: 2px dashed var(--primary);
  border-radius: 16px;
  background: var(--card);
  padding: 44px 20px;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.uploader.drag { background: #eef4ff; border-color: #1d4ed8; }
.upload-icon { font-size: 46px; }
.upload-title { font-size: 18px; font-weight: 600; margin: 10px 0 4px; }
.upload-hint { color: var(--muted); font-size: 13px; margin: 0 0 18px; }

.controls { margin-top: 22px; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px; box-shadow: var(--shadow); }
.control-row { display: flex; flex-wrap: wrap; gap: 18px; }
.control-row label { display: flex; flex-direction: column; font-size: 13px; color: var(--muted); gap: 6px; flex: 1; min-width: 200px; }
.control-row select, .control-row input[type="number"] {
  padding: 9px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; color: var(--ink); background: #fff;
}
.control-row input[type="range"] { width: 100%; accent-color: var(--primary); }
.control-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

.btn {
  border: 1px solid var(--border); background: #fff; color: var(--ink);
  padding: 10px 16px; border-radius: 9px; font-size: 14px; cursor: pointer; transition: transform 0.05s, box-shadow 0.2s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-ghost { color: var(--muted); }
.btn-kofi { background: var(--kofi); color: #fff; border-color: var(--kofi); text-decoration: none; display: inline-block; }

.results { margin-top: 26px; }
.results h2, .support h2 { font-size: 20px; margin: 0 0 14px; }
.summary { font-size: 14px; color: var(--muted); margin-bottom: 16px; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.summary b { color: var(--accent); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.card { background: #fff; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column; }
.card .thumb { width: 100%; height: 150px; object-fit: cover; background: #f0f2f5; display: block; }
.card .meta { padding: 12px 14px; font-size: 13px; }
.card .name { font-weight: 600; word-break: break-all; margin-bottom: 6px; }
.card .stat { display: flex; justify-content: space-between; color: var(--muted); margin: 2px 0; }
.card .stat .save { color: var(--accent); font-weight: 600; }
.card .dl { margin-top: 10px; }
.card .dl a { display: block; text-align: center; text-decoration: none; }

.support { margin-top: 40px; background: #fff8f0; border: 1px solid #ffe0c2; border-radius: 14px; padding: 22px; text-align: center; }
.support p { color: var(--muted); font-size: 14px; margin: 6px 0 14px; }
.support-links { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.support-note { font-size: 12px; margin-top: 14px; }

.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 24px 20px 40px; }

.wechat-qr-wrap { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.qr-label { font-size: 13px; color: #07c160; font-weight: 600; }
.qr-img { width: 140px; height: 140px; border-radius: 8px; border: 2px solid #e0e0e0; object-fit: cover; }