.rd-why {
  padding: clamp(30px, 4.166667vw, 80px) 0;
  background: #fff;
}

.rd-why-layout {
  display: grid;
  grid-template-columns: 53% 1fr;
  gap: clamp(30px, 3vw, 60px);
  align-items: center;
}

/* ============ 左侧文字 ============ */
.rd-why-eyebrow {
  text-transform: uppercase;
  color: #c8102e;
  font-size: clamp(14px, 0.78vw, 15px);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}
.rd-why-title {
  text-transform: uppercase;
  margin: 0 0 18px;
  font-size: clamp(24px, 2.30vw, 44px);
  line-height: 1.15;
  font-weight: 600;
  color: #111;
}
.rd-why-descs p {
  font-size: 14px;
  line-height: 1.72;
  color: #4a5a68;
  margin: 0 0 10px;
}
.rd-why-descs p:last-child { margin-bottom: 0; }

.btn-div{margin: clamp(30px, 2.604167vw, 50px) auto 0;text-align:center}

/* 按钮 */
.rd-why-btn {
  display: inline-block;
  padding: 12px 36px;
  border: 1px solid #1d4197;
  color: #1d4197;
  background: #fff;
  font-size: 14px;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all .25s ease;
}
.rd-why-btn:hover {
  background: #1d4197;
  color: #fff;
}

/* ============ 右侧视觉：图片 + 描边框 + 红色遮罩 ============ */
.rd-why-visual {
  position: relative;
  /* 右、下留出装饰块外露的空间 */
  padding: 0 clamp(24px, 2.5vw, 48px) clamp(24px, 2.5vw, 48px) 0;
}

/* 右下方红色遮罩（压在图片下层） */
.rd-why-visual::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 90%;
  height: 85%;
  background: #1d4197a3;
}
.rd-why-visual img {
  position: relative;
  z-index: 2;
  width: 100%;
  display: block;
  box-shadow: 14px 12px 21px 0px rgba(100, 100, 111, 0.2);
}

/* ============ 响应式 ============ */
@media screen and (max-width: 1024px) {
  .rd-why-layout { grid-template-columns: 1fr; }
  .rd-why-visual {padding: 0;}
  .rd-why-visual::after {display: none;}
}
@media screen and (max-width: 640px) {
  .rd-why-btn { width: 100%; text-align: center; box-sizing: border-box; }
}