/* ============ Signal 下载页 ============ */

.sg-hero{
  max-width: 1080px;
  margin: 32px auto 0;
  padding: 0 16px 12px;
  text-align: center;
}

.sg-hero__title{
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: .5px;
  margin: 8px 0 22px;
}

.sg-hero__stage{
  background: #bcd0ff;         /* 贴近截图的淡蓝色背景 */
  border-radius: 18px;
  padding: clamp(14px, 2.8vw, 28px);
  margin: 0 auto;
  max-width: 550px;
}
.sg-hero__img{
  display: block;
  width: 80%;
  max-width: 450px;
  margin: 0 auto;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 8px 28px rgba(30, 60, 120, .18);
  background:#fff;
}

.sg-hero__cta{
  margin: 22px 0 8px;
}
.sg-btn{
  display: inline-block;
  padding: 14px 22px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
}
.sg-btn--primary{
  background: #2c66ff;
  color: #fff;
  transition: transform .05s ease, box-shadow .2s ease, background .2s ease;
  box-shadow: 0 6px 16px rgba(44,102,255,.25);
}
.sg-btn--primary:hover{ background:#1f57f8; transform: translateY(-1px); }

.sg-hero__hint{
  color: #6a768a;
  font-size: 13px;
  margin-top: 10px;
}

.sg-hero__alt{
  margin: 26px 0 6px;
}
.sg-alt__title{ font-size: clamp(18px, 2.8vw, 22px); margin: 0 0 8px; }
.sg-alt__links{ margin: 0; }
.sg-link{ color:#2c66ff; text-decoration: none; }
.sg-link:hover{ text-decoration: underline; }
.sg-dot{ margin: 0 8px; color:#9aa6b6; }

.sg-section{
  padding: 28px 16px 6px;
}
.sg-section__inner{
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}
.sg-h2{
  font-size: clamp(22px, 3vw, 28px);
  margin: 0 0 10px;
}
.sg-p{
  color: #48576a;
  margin: 0;
}

.sg-grid{
  max-width: 980px;
  margin: 22px auto 8px;
  padding: 0 16px;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.sg-card{
  background: #fff;
  border: 1px solid #e7ecf3;
  border-radius: 12px;
  padding: 18px 16px;
  box-shadow: 0 6px 20px rgba(0,0,0,.04);
}
.sg-card h3{ margin: 0 0 8px; font-size: 18px; }
.sg-card p{ margin: 0; color:#506074; line-height: 1.7; }

.sg-latest{
  max-width: 1080px;
  margin: 26px auto 18px;
  padding: 0 16px;
}
.sg-cards{
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.sg-post{
  text-decoration: none;
  color: inherit;
  background: #fff;
  border: 1px solid #e7ecf3;
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 6px 20px rgba(0,0,0,.04);
}
.sg-post__cover{
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}
.sg-post__body{ padding: 14px 16px; }
.sg-post__date{ color:#7a8797; font-size: 12px; }
.sg-post__title{ margin: 6px 0 8px; font-size: 18px; line-height: 1.45; }
.sg-post__desc{
  color:#394a5e;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 与站内其他样式尽量“互不干扰” */