:root {
  --color: #a40000;
  --sub-color: #005bac;
  --body-bg: #ffffff;
  --f5: #f5f5f5;
  --footer-bg: #161c21;
  --text-color: #333;
  --ccc: #ccc;
  --eee: #eee;
  --333: #333;
  --666: #666;
  --white: #fff;
}
body {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-color);
  background-color: var(--body-bg);
  font-family: arial, helvetica, sans-serif;
  overflow-x: hidden;
}

body,
html {
  height: 100%;
  position: relative;
}

a {
  color: var(--text-color);
}
button,
span,
input,
div,
div:focus,
button:focus,
span:focus,
input:focus {
  outline: 0 !important;
}
a:hover,
a:focus {
  color: var(--color);
  text-decoration: none;
}

body,
dl,
dt,
dd,
ul,
ol,
li,
pre,
form,
fieldset,
input,
p,
blockquote,
th,
td {
  font-weight: 400;
  margin: 0;
  padding: 0;
}

h1,
h2,
h3,
h4,
h4,
h5 {
  margin: 0;
  padding: 0;
}

table {
  border-collapse: collapse;
}

ol,
ul,
li {
  list-style-image: none;
  list-style-position: outside;
  list-style-type: none;
}

.fl {
  float: left;
}

.fr {
  float: right;
}

.ttu {
  text-transform: uppercase;
}
/* logo */
.logo {
  margin-right: 20px;
}
.logo a {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo .logo_txt {
  margin-left: 20px;
}
.logo_txt h2 {
  font-size: 30px;
  font-weight: bold;
  letter-spacing: 4px;
  margin-top: 25px;
}
.logo_txt p {
  font-size: 16px;
  text-transform: uppercase;
}

/* top */
.logo_text b {
  font-size: 32px;
}
.logo_text span {
  font-size: 18px;
  text-transform: uppercase;
  color: #666;
  letter-spacing: 2px;
}
.w-80 {
  position: relative;
  width: 80%;
  margin-left: auto;
  margin-right: auto;
}
.menu > li {
  position: relative;
  flex: auto;
}
.menu > li > a {
  color: var(--text-color);
  font-size: 18px;
  font-weight: bold;
  padding: 10px 15px;
  display: inline-block;
  text-transform: uppercase;
}
.tell span {
  color: var(--color);
}
.tell p {
  font-size: 24px;
  line-height: 1;
}
.menu_drop {
  position: absolute;
  left: 0;
  min-width: 100%;
  white-space: nowrap;
  background-color: var(--body-bg);
  display: none;
  padding: 4px 0;
  border-radius: 4px;
  z-index: 99;
  border: 1px solid var(--ccc);
}

.menu_drop li a {
  color: var(--text-color);
  display: block;
  text-align: center;
  line-height: 2;
  transition: all 0.5s;
}

.menu_drop li:hover a {
  background-color: var(--color);
  color: var(--body-bg);
}

.swiper-pagination span {
  width: 12px;
  height: 12px;
  opacity: 1;
  background-color: rgba(255, 255, 255, 0.8);
  box-shadow: inset 1.5px 1px rgba(0, 0, 0, 0.7);
}
.index-banner {
  position: relative;
  overflow: hidden;
}
.index-banner .swiper-pagination-bullet.swiper-pagination-bullet-active {
  background-color: var(--color);
}
.swiper-button-white::after {
  font-size: 22px;
  color: #fff;
}

/* banner */
.index-banner .swiper-button-next.swiper-button-white,
.index-banner .swiper-button-prev.swiper-button-white {
  background-color: rgba(0, 0, 0, 0.2);
}
.index-banner .swiper-button-prev,
.index-banner .swiper-button-next {
  background-size: 60%;
}

/* 右边 */
.side_kefu {
  display: none;
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
}

.side_kefu li {
  position: relative;
  margin-bottom: 5px;
}

.side_kefu li i {
  font-size: 20px;
}

.side_kefu li.toTop {
  cursor: pointer;
}

.side_kefu li.toTop i {
  font-size: 24px;
}

.side_kefu li .side_kefu_con {
  position: absolute;
  background-color: var(--body-bg);
  border: 1px solid var(--ccc);
  border-radius: 5px;
  right: 0;
  top: 0;
  padding: 5px 10px;
  transition: all 0.5s;
  transform: translateX(100%);
  z-index: -1;
}

.side_kefu li:hover .side_kefu_con {
  transform: translateX(-50px);
}

.side_kefu_con:after {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  border: 1px solid var(--ccc);
  border-color: transparent var(--ccc) var(--ccc) transparent;
  -webkit-transform: rotate(-45deg);
  transform: rotate(-45deg);
  position: absolute;
  right: -6px;
  top: 10px;
  background-color: var(--body-bg);
}

.side_kefu li span {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background-color: var(--color);
  color: var(--body-bg);
}

@media (min-width: 1200px) {
  .container {
    width: 1200px;
  }
}
@media (max-width: 1200px) {
  .my-6 {
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
  }
}

.wrapper {
  width: 70%;
  margin: 0 auto;
  padding-left: 15px;
  padding-right: 15px;
}
.my-6 {
  margin-top: 4vw;
  margin-bottom: 4vw;
}

/* abouts */
.keyword {
  border-radius: 20px;
  padding: 0 20px;
  border: 1px solid #444;
}
.keyword + button {
  background-color: #fff;
  border: 1px solid #444;
  border-radius: 20px;
}
.abouts_title {
  font-size: 50px;
  text-transform: uppercase;
  font-weight: bold;
  position: relative;
  padding-bottom: 15px;
  margin-bottom: 20px;
}
.abouts_title:after {
  display: block;
  content: "";
  width: 150px;
  height: 4px;
  background-color: #333;
  left: 0;
  bottom: 0;
}
.abouts_l {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
}
.abouts_l p {
  font-size: 20px;
  width: 80%;
}
.abouts_l .more {
  background-color: #dcdcdc;
  font-size: 20px;
  padding: 10px 25px;
  margin-bottom: 20px;
}

/* products */
.pro_bg {
  position: relative;
  padding: 8vw;
  z-index: 9;
}
.pro_bg:before {
  position: absolute;
  display: block;
  content: "";
  width: 75%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
  right: 0;
  top: 0;
  z-index: -1;
}
.pro_bg:after {
  position: absolute;
  display: block;
  content: "";
  width: 40%;
  height: 80%;
  background-color: #a40000;
  left: 0;
  top: 10%;
  z-index: -1;
}
.pro_box {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}
.pro_right {
  flex: 0 0 68%;
  width: 68%;
}
.pro_left {
  flex: 0 0 28%;
  width: 28%;
}
.pro_banner a {
  display: block;
  position: relative;
}
.pro_banner p {
  text-align: left;
  padding: 0 4vw;
  position: absolute;
  left: 0;
  right: 0;
  top: 60%;
  color: #fff;
  font-size: 30px;
}
.pro_left p {
  font-size: 60px;
  text-transform: uppercase;
  color: #fff;
  line-height: 1.2;
  margin-top: 4vw;
  margin-bottom: 2vw;
}
.pro_left span {
  display: inline-block;
  width: 120px;
  background-color: #fff;
  height: 2px;
  margin-bottom: 3vw;
}
.pro_btn {
  display: flex;
  justify-content: space-between;
  padding-left: 15vw;
  margin-top: 4vw;
}

/* process */
.process {
  background-color: #e5e5e5;
  padding: 4vw 0;
}
.prc_l .title {
  font-size: 48px;
  font-weight: bold;
  text-transform: uppercase;
  line-height: 1;
}
.prc_l .title span {
  display: inline-block;
  width: 120px;
  height: 4px;
  margin-bottom: 10px;
  background-color: #333;
}

.top_img {
  margin-bottom: 20px;
}
.bot_img {
  display: flex;
}
.bot_img img {
  margin-right: 20px;
}
.prc_l .title {
  font-size: 48px;
  font-weight: bold;
}
.prc_l .text p {
  font-size: 26px;
  margin-bottom: 20px;
}
.text_a {
  margin-top: 4vw;
  margin-bottom: 2vw;
}
.text_a p {
  margin-bottom: 1vw;
  font-size: 26px;
}
.text_a a.more {
  display: inline-block;
  background-color: #dcdcdc;
  font-size: 20px;
  padding: 10px 25px;
  margin-top: 4vw;
}

/* news */
.news_tt {
  font-size: 43px;
  font-weight: bold;
  text-transform: uppercase;
}
.news_more {
  font-size: 18px;
  position: relative;
  padding-bottom: 20px;
}
.news_more:after {
  position: absolute;
  width: 100%;
  height: 8px;
  background-color: #333;
  bottom: 0;
  content: "";
  left: 50%;
  transform: translatex(-50%);
}
.news_home {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 2;
  font-size: 26px;
}

/* footer */
footer {
  margin-top: 20px;
  background-color: #434343;
  color: #fff;
  padding: 3vw 0;
}
footer a {
  color: #fff;
}
.f_menu {
  display: flex;
  justify-content: space-between;
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 3vw;
}
.f_menu a {
  text-transform: uppercase;
  transition: all 0.5s;
}
.contact-title {
  font-size: 36px;
  font-weight: bold;
  text-transform: uppercase;
  padding-bottom: 20px;
  margin-bottom: 20px;
}
.contact-title:after {
  position: absolute;
  display: block;
  content: "";
  width: 120px;
  height: 4px;
  background-color: #fff;
}
.contact_bottom {
  font-size: 18px;
}
.footer_b {
  background-color: #1b1b1b;
  color: #fff;
  padding: 0.5vw 0;
}


@media (max-width: 1750px) {
  .logo img {
    max-width: 250px;
  }
  .menu > li > a {
    font-size: 16px;
    padding: 10px;
  }
  .keyword {
    max-width: 150px;
  }
  .abouts_title,
  .pro_left p {
    font-size: 46px;
  }
  .abouts_l p {
    font-size: 18px;
  }
  .pro_banner p,
  .prc_l .text p {
    font-size: 22px;
  }
  .prc_l .title {
    font-size: 36px;
  }
  .bot_img img {
    max-width: 48%;
  }
  .top_img img {
    max-width: 80%;
  }
  .bot_img {
    display: flex;
    justify-content: space-between;
  }
}
@media (max-width: 1440px) {
  .logo img {
    max-width: 200px;
  }
  .menu > li > a {
    font-weight: normal;
  }
  .abouts_l .more {
    font-size: 16px;
  }
}
@media (max-width: 1366px) {
  .menu > li:last-child {
    display: none;
  }

  .abouts_title,
  .pro_left p,
  .news_tt {
    font-size: 32px;
  }
  .text_a p,
  .contact-title {
    font-size: 22px;
  }
  .pro_btn .right {
    margin-left: 20px;
  }
  .pro_btn {
    padding-left: 6vw;
  }
  .mb-20 {
    margin-bottom: 20px;
  }
  .w-80,.abouts_l p {
      width: 100%;
  }
}
@media (max-width: 1200px) {
  .menu > li > a {
    padding: 5px;
  }
  .top_img img {
    max-width: 100%;
  }
  .news_mores {
    display: none;
  }
  .news_home {
    font-size: 14px;
  }
  .abouts_title,
  .pro_left p,
  .news_tt {
    font-size: 18px;
  }
  .prc_l .title {
    font-size: 22px;
  }
  .prc_l .title {
    margin-top: 15px;
  }
  .pro_btn img {
    max-width: 35px;
  }
  .pro_banner p,
  .prc_l .text p {
    font-size: 14px;
  }
  .bot_img img {
    max-width: 48%;
  }
}

@media (max-width: 768px) {
  .wrapper {
    width: 100%;
  }
  header,
  footer,
  .footer_b {
    display: none;
  }
  .pro_btn{
      padding-left:0;
  }
}