/* 工具专属样式：hero + 封面网格 + 落地内容。通用主题/顶栏见 /shared.css。 */
.hero {
  max-width: 820px;
  margin: 0 auto;
  padding: 64px 20px 32px;
  text-align: center;
}
.hero h1 { font-size: 2rem; margin: 0 0 12px; line-height: 1.2; }
.sub { color: var(--muted); max-width: 640px; margin: 0 auto 24px; }

.gen-form { display: flex; gap: 10px; max-width: 640px; margin: 0 auto; }
.gen-form input {
  flex: 1;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 1rem;
}
.gen-form input:focus { outline: none; border-color: var(--accent); }
.gen-form button {
  padding: 14px 24px;
  border: none;
  border-radius: 10px;
  background: var(--accent-2);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
}
.gen-form button:disabled { opacity: 0.6; cursor: default; }

.example-hint { color: var(--muted); font-size: 0.88rem; margin: 14px 0 0; }

.status { margin: 20px auto 0; max-width: 640px; color: var(--muted); text-align: center; }
.status.error { color: #ff7a7a; }

/* ---------- 封面结果网格 ---------- */
.results {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px 20px 40px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.thumb-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%; /* 填满被网格拉伸的行高，保证同行卡片等高 */
}
/* 绝对定位把图片从容器高度计算里摘出去，让 aspect-ratio 真正锁死预览框，
   否则 4:3 缩略图（自带黑边）会撑高容器，卡片高度参差、按钮错位。 */
.thumb-preview {
  position: relative;
  background: #000;
  aspect-ratio: 16 / 9;
  width: 100%;
}
.thumb-preview img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.thumb-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 12px 14px 4px;
}
.thumb-label { font-weight: 600; font-size: 0.95rem; }
.thumb-size { color: var(--muted); font-size: 0.82rem; font-variant-numeric: tabular-nums; }
.thumb-actions { display: flex; gap: 8px; padding: 10px 14px 14px; margin-top: auto; }
.thumb-dl {
  flex: 1;
  padding: 9px 12px;
  border: none;
  border-radius: 8px;
  background: var(--accent-2);
  color: #fff;
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
}
.thumb-dl:hover { filter: brightness(1.08); }
.thumb-dl:disabled { opacity: 0.6; cursor: default; }
.thumb-open {
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
}
.thumb-open:hover { border-color: var(--accent); }

/* ---------- 落地内容（How it works / Sizes / FAQ）---------- */
.lp { border-top: 1px solid var(--border); }
.lp-inner { max-width: 820px; margin: 0 auto; padding: 48px 20px 80px; }
.lp h2 { font-size: 1.5rem; margin: 40px 0 18px; }
.lp h2:first-child { margin-top: 0; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.steps li {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  color: #cdd3df;
}
.steps .n {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-2);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.feature-grid > div {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}
.feature-grid h3 { margin: 0 0 6px; font-size: 1rem; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.faq details {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 600; color: var(--text); }
.faq details p { margin: 10px 0 0; color: var(--muted); font-size: 0.92rem; }

.cross-sell {
  margin-top: 40px;
  padding: 18px 20px;
  background: rgba(108, 140, 255, 0.1);
  border: 1px solid rgba(108, 140, 255, 0.35);
  border-radius: 12px;
  text-align: center;
}
.cross-sell p { margin: 0; color: #cdd6f0; }
.cross-sell a { color: var(--accent); font-weight: 600; text-decoration: none; }
.cross-sell a:hover { text-decoration: underline; }

@media (max-width: 640px) {
  .hero { padding: 32px 16px 24px; }
  .hero h1 { font-size: 1.5rem; }
  .sub { font-size: 0.95rem; }
  .gen-form { flex-direction: column; }
  .gen-form button { width: 100%; }
  .results { padding: 12px 14px 40px; gap: 14px; }
}