/* 旧能力图库撤下后，仅保留深色保密画布；外层留白与其他整屏板块衔接。 */
.proof-security-only { padding: 96px 0 100px; }
.proof-security-only .security.security-one-screen {
  display: flex;
  flex-direction: column;
  gap: 0;
  align-items: stretch;
  min-height: 70vh;
  width: var(--shell);
  margin: 0 auto;
  padding: 0;
  scroll-margin-top: 110px;
  border-top: 0;
  border-radius: 0;
  color: #f5f6f8;
  background: transparent;
}
.security-one-screen h2,
.security-one-screen h3,
.security-one-screen p,
.security-one-screen figure { margin: 0; }
.security-one-screen .security-intro {
  display: grid;
  grid-template-columns: 46% minmax(0,1fr);
  align-items: end;
  gap: 48px;
}
.security-one-screen .security-intro h2 {
  font-size: clamp(38px, calc(3.3 * var(--layout-unit)), 54px);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -.05em;
}
.security-one-screen .security-intro p {
  color: #999ba3;
  font-size: 17px;
  line-height: 1.7;
}
/* 一张NDA场景图作视觉锚点，右侧四点以开放分隔线保留阅读呼吸感。 */
.security-one-screen .security-overview {
  display: grid;
  flex: 1;
  grid-template-columns: 46% minmax(0,1fr);
  align-items: stretch;
  gap: 48px;
  margin-top: 52px;
}
.security-one-screen .security-nda-image {
  position: relative;
  min-height: 330px;
  overflow: hidden;
  border-radius: 28px;
  background: #293440;
}
.security-one-screen .security-nda-image::after {
  position: absolute;
  inset: 50% 0 0;
  content: "";
  background: linear-gradient(transparent,rgba(12,16,21,.78));
  pointer-events: none;
}
.security-one-screen .security-nda-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 保留原图像素和色彩，不对照片做再次调色。 */
  filter: none;
}
.security-one-screen .security-nda-image figcaption {
  position: absolute;
  z-index: 1;
  right: 22px;
  bottom: 18px;
  left: 22px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
}
.security-one-screen .security-process {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  grid-template-rows: repeat(2,minmax(0,1fr));
  gap: 44px 32px;
}
.security-one-screen .security-process article {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding-top: 18px;
  border-top: 1px solid #42434b;
}
.security-one-screen .security-process article > span {
  display: block;
  margin-bottom: 9px;
  color: #a7a2c2;
  font-size: 14px;
  line-height: 1.3;
}
.security-one-screen .security-process h3 {
  margin-bottom: 10px;
  font-size: 23px;
  font-weight: 600;
  line-height: 1.2;
}
.security-one-screen .security-process p {
  color: #aeb0b8;
  font-size: 16px;
  line-height: 1.55;
}
.security-one-screen .security-commitment {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid #42434b;
  color: #999ba3;
  font-size: 16px;
  line-height: 1.4;
}
/* 审图参数只遮蔽固定咨询入口，正常官网入口不受影响。 */
.security-preview .consult-drop { display: none; }
/* 中等宽度先改为上下分区，避免双栏文字把整页撑出视口。 */
@media (max-width: 980px) {
  .proof-security-only .security.security-one-screen { width: min(var(--shell), calc(100vw - 40px)); min-height: 0; margin-right: 0; margin-left: 20px; }
  .security-one-screen .security-intro { grid-template-columns: 1fr; gap: 18px; }
  .security-one-screen .security-overview { grid-template-columns: 1fr; gap: 30px; }
  .security-one-screen .security-nda-image { height: 320px; min-height: 0; }
  .security-one-screen .security-process { grid-template-rows: auto; }
  .security-one-screen .security-process article { min-height: 160px; }
}
@media (max-width: 680px) {
  .proof-security-only { padding: 64px 0 76px; }
  .proof-security-only .security.security-one-screen { display: block; width: var(--shell); min-height: 0; margin: 0 auto; padding: 0; }
  .security-one-screen .security-intro { grid-template-columns: 1fr; gap: 16px; }
  .security-one-screen .security-intro h2 { font-size: 38px; }
  .security-one-screen .security-intro p { font-size: 17px; }
  .security-one-screen .security-overview { grid-template-columns: 1fr; gap: 24px; margin-top: 28px; }
  .security-one-screen .security-nda-image { min-height: 0; height: 220px; border-radius: 20px; }
  .security-one-screen .security-process { grid-template-columns: 1fr; grid-template-rows: auto; gap: 0; }
  .security-one-screen .security-process article { padding: 16px 0 18px; }
  .security-one-screen .security-process h3 { font-size: 22px; }
  .security-one-screen .security-commitment { line-height: 1.6; }
}