html {
  font-size: 1vw;
  overflow-x: hidden;
}
body {
  font-family: "Microsoft YaHei", Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f2f2f2;
}

/* Banner区 */
.tech-banner {
  position: relative;
  height: 35rem;
  color: #fff;
}
.tech-banner-img {
  position: absolute;
  left: 0;
  top: 0;
  width: 45%;
  height: 100%;
  background: var(--theme-color2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.tech-banner-img img {
  width: 80%;
  height: auto;
}
.tech-banner-title {
  position: absolute;
  right: 0;
  top: 0;
  width: 55%;
  height: 100%;
  background: var(--theme-color1);
  padding: 7rem 11rem 4rem 14rem;
  box-sizing: border-box;
}
.tech-banner-title h1 {
  margin-top: 0;
  font-size: 3em;
  margin-bottom: 1.5rem;
}

/* 介绍区 */
.tech-intro {
  position: relative;
  background: var(--theme-color2);
  color: #fff;
  padding: 2rem 4rem;
  font-size: 1.1em;
  text-align: center;
  margin: 2rem 0;
}

/* 内容区 */
.tech-section-container {
  position: relative;
  margin: 3rem 0;
  height: 80rem;
}
.tech-section {
  position: absolute;
  height: 28rem;
  width: 100%;
}
.tech-section:nth-child(1) {
  top: 0;
}
.tech-section:nth-child(2) {
  top: 30rem;
}
.tech-section:nth-child(3) {
  top: 60rem;
}
.tech-section-img {
  position: absolute;
  width: 48rem;
  height: 28rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.tech-section-img img {
  width: 90%;
  height: auto;
}
.tech-section-block {
  position: absolute;
  width: 39rem;
  height: 22rem;
  padding: 2rem;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  z-index: 1;
}
.tech-section-blue {
  background: var(--theme-color1);
  right: 0;
  top: 5rem;
}
.tech-section-gray {
  background: var(--theme-color2);
  left: 0;
  top: 8rem;
}
.tech-section-block h2 {
  font-size: 2rem;
  font-weight: 300;
  margin-bottom: 1rem;
}
.tech-section-block p {
  font-size: 1em;
  line-height: 2;
  margin-bottom: 4rem;
}

/* 顶部大图与标语 */
.tech-hero {
  position: relative;
  height: 41rem;
}
.tech-hero-img {
  position: absolute;
  width: 90rem;
  height: 41rem;
  object-fit: cover;
  left: 0rem;
  background-size: cover;
  background-position: center;
}
.tech-hero-desc {
  position: absolute;
  right: 0rem;
  top: 22rem;
  width: 50rem;
  height: 21rem;
  background: var(--theme-banner);
  color: #fff;
  padding: 2rem 4rem 2rem 4rem;
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  justify-content: flex-start;
  box-sizing: border-box;
}
.tech-hero-detail {
  font-size: 2.5rem;
  font-weight: 300;
  line-height: 1.5;
}
.tech-hero-title {
  margin-top: 1rem;
  font-size: 4rem;
  font-weight: 700;
  line-height: 2;
}
.tech-hero-text {
  font-size: 1rem;
  font-weight: 300;
  background: var(--theme-color2);
  color: #fff;
  padding: 4.5rem 9rem 2.5rem 9rem;
  width: 100%;
  box-sizing: border-box;
  line-height: 2;
  text-align: justify;
}

/* 内容区 */
.conference-list {
  margin: 0rem 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}
.conference-item {
  position: relative;
  height: 43rem;
}
.conference-date {
  width: auto;
  min-width: 0;
  padding: 0;
  display: inline-block;
  font-weight: bold;
  text-align: left;
}
.conference-info {
  position: absolute;
  padding: 2rem 11rem 2rem 8rem;
  color: #fff;
  background: var(--theme-color1);
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}
.conference-info h3 {
  margin-bottom: 1.5rem;
  font-size: 2.4rem;
  font-weight: 400;
}
.conference-info p {
  font-size: 1rem;
  line-height: 2;
}
.conference-img {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
}
.conference-img div {
  width: 18.75rem;
  height: 12.5rem;
  object-fit: cover;
}

.tech-intro-text {
  font-size: 1rem;
  font-weight: 300;
  background: var(--theme-color2);
  color: #fff;
  padding: 1.5rem 9rem 2.5rem 9rem;
  width: 100%;
  box-sizing: border-box;
  line-height: 2;
  text-align: justify;
}

.tech-intro-text h2 {
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: 0rem;
}

.tech-intro-text p {
  font-size: 1rem;
  line-height: 1.8;
  font-weight: 300;
}