@media only screen and (max-width:1279px){
    body {
        min-width: 1140px;
    }
    .w {
        width: 1140px;
    }
    .banner-top {
        height: 160px;
        padding-top: 26px;
    }
    .banner-main b {
        font-size: 48px;
    }
    .banner-main b img {
        width: 286px;
    }
    .banner-main .banner-search {
        width: 518px;
        margin-top: 22px;
        height: 38px;
        line-height: 38px;
    }
    .banner-main .banner-search input {
        width: 377px;
        height: 38px;
        line-height: 38px;
        text-indent: 10px;
        font-size: 12px;
    }
    .banner-main .banner-search button {
        width: 72px;
        height: 34px;
        line-height: 34px;
        margin-top: 2px;
        font-size: 12px;
    }
    .banner-main .banner-search button i {
        width: 14px;
        height: 14px;
        margin: 10px 5px 0 0;
    }
    .searchSelect {
        height: 38px;
        width: 65px;
    }
    .selectTop p {
        margin-top: 10px;
        font-size: 12px;
    }
    .selectTop i {
        right: 6px;
        top: 6px;
    }
    .selectBot {
        top: 38px;
        width: 65px;
    }
    .selectBot {
        border-bottom: 1px solid #e6e6e6;
        border-top: 1px solid #e6e6e6
    }
    .selectBot li {
        font-size: 12px;
        line-height: 22px;
        border-left: 1px solid #e6e6e6;
        border-right: 1px solid #e6e6e6;
    }
    .banner-adv ul {
        width: calc(100% + 8px);
        margin: 0px 0 0 -4px;
    }
    .banner-adv ul li .adv-item {
        margin: 14px 4px 0 4px;
    }
    .topicMain {
        margin-top: 25px;
    }
    .topicLeft {
        width: 670px;
    }
    .topicRight {
        width: 426px;
    }
    .topicNav {
        height: 38px;
        line-height: 38px;
    }
    .topicNav a {
        font-size: 15px;
        margin-right: 15px;
        padding: 0 20px;
    }
    .topicList {
        margin-top: 22px;
    }
    .topicList ul li .image {
        width: 169px;
        margin-right: 15px;
    }
    .topicList ul li .text b {
        height: 26px;
        line-height: 26px;
        font-size: 16px;
    }
    .topicList ul li .text p {
        height: 36px;
        line-height: 18px;
        font-size: 12px;
        margin-top: 12px;
    }
    .topicList ul li .text .bot {
        margin-top: 20px;
    }
    .topicList ul li .text .bot span {
        font-size: 12px;
    }
    .topicList ul li .text .bot em {
        font-size: 12px;
    }
    .topicList ul li .text .bot em i {
        font-size: 12px;
        margin-right: 2px;
    }
    .topicList ul li {
        margin-bottom: 28px;
    }
    .topicList .item-main .item {
		padding: 10px 0 9px 0;
	}
	.topicList .item-main .item .image {
		width: 40px;
		height: 40px;
	}
	.topicList .item-main .item .text b {
		font-size: 14px;
		height: 20px;
		line-height: 20px;
	}
	.topicList .item-main .item .text p {
		margin-top: 0;
		height: 18px;
		line-height: 18px;
        font-size: 12px;
	}
	.topicList .item-main .item .text .bot span {
        font-size: 12px;
    }
	.topicList .item-main .item .text .bot em {
        font-size: 12px;
    }
	.topicList .item-main .item .text .bot em i {
        font-size: 12px;
        margin-right: 2px;
    }
    .topicList .more {
        width: 140px;
        height: 34px;
        line-height: 34px;
        font-size: 12px;
    }

    .topicTitle {
        height: 46px;
        line-height: 46px;
    }
    .topicTitle b {
        font-size: 18px;
    }
    .topicTitle b img {
        margin: 12px 8px 0 0;
    }
    .topicTitle::before {
        width: 90px;
    }
    .topicTitle::after {
        width: 334px;
    }
    .hotTopic ul {
        margin-top: 15px;
    }
    .hotTopic ul li {
        margin-bottom: 11px;
        padding: 5px 10px;
    }
    .hotTopic ul li .image {
        width: 52px;
        height: 52px;
        margin-right: 10px;
    }
    .hotTopic ul li .text {
        padding: 9px 0;
    }
    .hotTopic ul li .text p {
        line-height: 19px;
        height: 38px;
        font-size: 13px;
    }

    .relVideo {
        margin-top: 16px;
    }
    .relEquipment {
        margin-top: 4px;
    }
    .relVideo ul {
        margin: -8px -6px;
        margin-top: 7px;
    }
    .relVideo li {
        padding: 8px 6px;
    }
    .relVideo li .image p {
        padding: 10px 6px 6px 6px;
        font-size: 12px;
    }
    .relVideo .image strong {
        max-height: 18px;
        line-height: 18px;
        overflow: hidden;
        display: block;
        font-weight: normal;
    }
    .relVideo .image:hover strong {
        max-height: 36px;
    }
    .relVideo .image strong i {
        font-size: 14px;
    }
    .relVideo li .image b {
        line-height: 24px;
        padding: 0 8px;
        font-size: 12px;
    }
    .relEquipment ul li .image {
        width: 80px;
        height: 80px;
        margin-right: 10px;
    }
    .relEquipment ul {
       margin: -12px -8px;
       margin-top: 2px;
    }
    .relEquipment ul li {
        padding: 12px 8px;
    }
    .relEquipment ul li .text b {
        height: 36px;
        line-height: 18px;
        font-size: 12px;
    }
    .relEquipment ul li .text p {
        margin-top: 6px;
    }
    .relEquipment ul li .text .price {
        margin-top: 6px;
        font-size: 14px;
    }
    .topicTitle .more {
        font-size: 12px;
    }
    .topicTitle .more i {
        margin-left: 0;
    }
    .relSubject ul {
        margin: 5px -10px 0 0;
    }
    .relSubject li {
        margin-top: 10px;
        padding-right: 10px;
    }
    .relSubject li a {
        height: 24px;
        line-height: 24px;
        padding: 0 10px 0 20px;
        font-size: 12px;
    }
    .relSubject li a::after {
        left: 6px;
        width: 3px;
        height: 3px;
    }
}
@media only screen and (min-width:1280px) and (max-width:1365px){
    .w {
        width: 1240px;
    }
    .banner-top {
        height: 174px;
        padding-top: 30px;
    }
    .banner-main b {
        font-size: 52px;
    }
    .banner-main b img {
        width: 310px;
    }
    .banner-main .banner-search {
        width: 562px;
        margin-top: 22px;
        height: 42px;
        line-height: 42px;
    }
    .banner-main .banner-search input {
        width: 414px;
        height: 42px;
        line-height: 42px;
        text-indent: 10px;
        font-size: 12px;
    }
    .banner-main .banner-search button {
        width: 78px;
        height: 36px;
        line-height: 36px;
        margin-top: 2px;
        font-size: 12px;
    }
    .banner-main .banner-search button i {
        width: 14px;
        height: 14px;
    }
    .searchSelect {
        height: 46px;
        width: 65px;
    }
    .selectTop p {
        margin-top: 12px;
    }
    .selectTop i {
        right: 6px;
    }
    .selectBot {
        top: 44px;
        width: 65px;
    }
    .banner-adv ul {
        width: calc(100% + 8px);
        margin: 0px 0 0 -4px;
    }
    .banner-adv ul li .adv-item {
        margin: 16px 4px 0 4px;
    }
    .topicMain {
        margin-top: 26px;
    }
    .topicLeft {
        width: 730px;
    }
    .topicRight {
        width: 462px;
    }
    .topicNav {
        height: 42px;
        line-height: 42px;
    }
    .topicNav a {
        font-size: 16px;
        margin-right: 18px;
        padding: 0 26px;
    }
    .topicList {
        margin-top: 24px;
    }
    .topicList ul li .image {
        width: 184px;
        margin-right: 16px;
    }
    .topicList ul li .text b {
        font-size: 17px;
    }
    .topicList ul li .text p {
        height: 38px;
        line-height: 19px;
        font-size: 12px;
        margin-top: 12px;
    }
    .topicList ul li .text .bot {
        margin-top: 20px;
    }
    .topicList ul li .text .bot span {
        font-size: 12px;
    }
    .topicList ul li .text .bot em {
        font-size: 12px;
    }
    .topicList ul li .text .bot em i {
        font-size: 12px;
        margin-right: 2px;
    }
    .topicList ul li {
        margin-bottom: 30px;
    }
    .topicList .item-main .item {
		padding: 10px 0 11px 0;
	}
    .topicList .item-main .item .text b {
        font-size: 15px;
    }
	.topicList .item-main .item .text .bot span {
        font-size: 12px;
    }
	.topicList .item-main .item .text .bot em {
        font-size: 12px;
    }
	.topicList .item-main .item .text .bot em i {
        font-size: 12px;
        margin-right: 2px;
    }
    .topicTitle {
        height: 50px;
        line-height: 50px;
    }
    .topicTitle b {
        font-size: 20px;
    }
    .topicTitle b img {
        margin: 12px 8px 0 0;
    }
    .topicTitle::before {
        width: 97px;
    }
    .topicTitle::after {
        width: 365px;
    }
    .hotTopic ul {
        margin-top: 16px;
    }
    .hotTopic ul li {
        margin-bottom: 12px;
        padding: 7px 12px;
    }
    .hotTopic ul li .image {
        width: 56px;
        height: 56px;
        margin-right: 12px;
    }
    .hotTopic ul li .text {
        padding: 9px 0;
    }
    .hotTopic ul li .text p {
        line-height: 19px;
        height: 38px;
        font-size: 13px;
    }

    .relVideo {
        margin-top: 18px;
    }
    .relEquipment {
        margin-top: 0;
    }
    .relVideo ul {
        margin: -8px -7px;
        margin-top: 8px;
    }
    .relVideo li {
        padding: 8px 7px;
    }
    .relVideo li .image b {
        line-height: 24px;
        padding: 0 8px;
        font-size: 12px;
    }
    .relVideo .image strong i {
        font-size: 14px;
    }
    .relVideo li .image p {
        padding: 14px 10px 8px 10px;
        font-size: 14px;
    }
    .relVideo .image strong {
        max-height: 20px;
        line-height: 20px;
        overflow: hidden;
        display: block;
        font-weight: normal;
    }
    .relVideo .image:hover strong {
        max-height: 40px;
    }
    .relEquipment ul li .image {
        width: 86px;
        height: 86px;
        margin-right: 12px;
    }
    .relEquipment ul {
       margin: -13px -10px;
       margin-top: 2px;
    }
    .relEquipment ul li {
        padding: 13px 10px;
    }
    .relEquipment ul li .text b {
        height: 40px;
        line-height: 20px;
        font-size: 14px;
    }
    .relEquipment ul li .text p {
        margin-top: 6px;
    }
    .relEquipment ul li .text .price {
        margin-top: 8px;
        font-size: 15px;
    }
    .topicTitle .more {
        font-size: 12px;
    }
    .topicTitle .more i {
        margin-left: 0;
    }
    .relSubject ul {
        margin: 10px -12px 0 0;
    }
    .relSubject li {
        margin-top: 12px;
        padding-right: 12px;
    }
    .relSubject li a {
        height: 26px;
        line-height: 26px;
        padding: 0 12px 0 25px;
        font-size: 13px;
    }
    .relSubject li a::after {
        left: 7px;
    }
}
@media only screen and (min-width: 1366px) and (max-width:1599px){
    .w {
		width: 1300px;
    }
    .banner-top {
        height: 182px;
        padding-top: 30px;
    }
    .banner-main b {
        font-size: 58px;
    }
    .banner-main b img {
        width: 326px;
    }
    .banner-main .banner-search {
        width: 590px;
        margin-top: 22px;
        height: 44px;
        line-height: 44px;
    }
    .banner-main .banner-search input {
        width: 438px;
        height: 44px;
        line-height: 44px;
        text-indent: 10px;
        font-size: 12px;
    }
    .banner-main .banner-search button {
        width: 82px;
        height: 40px;
        line-height: 40px;
        margin-top: 2px;
        font-size: 12px;
    }
    .banner-main .banner-search button i {
        width: 14px;
        height: 14px;
    }
    .searchSelect {
        height: 46px;
        width: 65px;
    }
    .selectTop p {
        margin-top: 13px;
    }
    .selectTop i {
        right: 6px;
    }
    .selectBot {
        top: 44px;
        width: 65px;
    }
    .banner-adv ul {
        width: calc(100% + 8px);
        margin: 0px 0 0 -4px;
    }
    .banner-adv ul li .adv-item {
        margin: 18px 4px 0 4px;
    }
    .topicMain {
        margin-top: 28px;
    }
    .topicLeft {
        width: 765px;
    }
    .topicRight {
        width: 486px;
    }
    .topicNav {
        height: 45px;
        line-height: 45px;
    }
    .topicNav a {
        font-size: 17px;
        margin-right: 18px;
        padding: 0 28px;
    }
    .topicList {
        margin-top: 27px;
    }
    .topicList ul li .image {
        width: 193px;
        margin-right: 18px;
    }
    .topicList ul li .text b {
        font-size: 17px;
    }
    .topicList ul li .text p {
        height: 40px;
        line-height: 20px;
        font-size: 13px;
        margin-top: 14px;
    }
    .topicList ul li .text .bot {
        margin-top: 22px;
    }
    .topicList ul li {
        margin-bottom: 30px;
    }

    .topicTitle {
        height: 52px;
        line-height: 52px;
    }
    .topicTitle b {
        font-size: 20px;
    }
    .topicTitle b img {
        margin: 16px 8px 0 0;
    }
    .topicTitle::before {
        width: 102px;
    }
    .topicTitle::after {
        width: 380px;
    }
    .hotTopic ul {
        margin-top: 16px;
    }
    .hotTopic ul li {
        margin-bottom: 12px;
        padding: 8px 13px;
    }
    .hotTopic ul li .image {
        width: 60px;
        height: 60px;
        margin-right: 12px;
    }
    .hotTopic ul li .text p {
        line-height: 20px;
        height: 40px;
        font-size: 14px;
    }

    .relVideo {
        margin-top: 18px;
    }
    .relEquipment {
        margin-top: 0;
    }
    .relVideo ul {
        margin: -10px -7px;
        margin-top: 8px;
    }
    .relVideo li {
        padding: 10px 7px;
    }
    .relVideo li .image p {
        padding: 14px 10px 8px 10px;
        font-size: 14px;
    }
    .relVideo .image strong {
        max-height: 20px;
        line-height: 20px;
        overflow: hidden;
        display: block;
        font-weight: normal;
    }
    .relVideo .image:hover strong {
        max-height: 40px;
    }
    .relEquipment ul li .image {
        width: 90px;
        height: 90px;
        margin-right: 14px;
    }
    .relEquipment ul {
       margin: -14px -10px;
       margin-top: 2px;
    }
    .relEquipment ul li {
        padding: 14px 10px;
    }
    .relEquipment ul li .text b {
        height: 40px;
        line-height: 20px;
        font-size: 14px;
    }
    .relEquipment ul li .text p {
        margin-top: 8px;
    }
    .relEquipment ul li .text .price {
        margin-top: 8px;
    }
    .topicTitle .more {
        font-size: 12px;
    }
    .topicTitle .more i {
        margin-left: 0;
    }
    .relSubject ul {
        margin: 10px -12px 0 0;
    }
    .relSubject li {
        margin-top: 12px;
        padding-right: 12px;
    }
    .relSubject li a {
        height: 30px;
        line-height: 30px;
        padding: 0 12px 0 27px;
        font-size: 14px;
    }
    .relSubject li a::after {
        left: 8px;
    }
}
@media only screen and (min-width: 1600px) and (max-width:1919px){
    .w {
        width: 1400px;
    }
    .banner-top {
        height: 196px;
        padding-top: 32px;
    }
    .banner-main b {
        font-size: 64px;
    }
    .banner-main b img {
        width: 350px;
    }
    .banner-main .banner-search {
        width: 635px;
        margin-top: 25px;
        height: 46px;
        line-height: 46px;
    }
    .banner-main .banner-search input {
        width: 470px;
        height: 46px;
        line-height: 46px;
    }
    .banner-main .banner-search button {
        width: 88px;
        height: 42px;
        line-height: 42px;
        margin-top: 2px;
    }
    .searchSelect {
        height: 46px;
    }
    .selectTop p {
        margin-top: 13px;
    }
    .selectBot {
        top: 46px;
    }
    .topicMain {
        margin-top: 30px;
    }
    .topicLeft {
        width: 822px;
    }
    .topicRight {
        width: 523px;
    }
    .topicNav {
        height: 47px;
        line-height: 47px;
    }
    .topicNav a {
        font-size: 18px;
    }
    .topicList {
        margin-top: 27px;
    }
    .topicList ul li .image {
        width: 207px;
    }
    .topicList ul li .text b {
        font-size: 18px;
    }
    .topicList ul li .text p {
        height: 44px;
        line-height: 22px;
        font-size: 14px;
        margin-top: 16px;
    }
    .topicList ul li .text .bot {
        margin-top: 26px;
    }
    .topicList ul li {
        margin-bottom: 34px;
    }

    .topicTitle {
        height: 56px;
        line-height: 56px;
    }
    .topicTitle b {
        font-size: 22px;
    }
    .topicTitle::before {
        width: 110px;
    }
    .topicTitle::after {
        width: 411px;
    }
    .hotTopic ul {
        margin-top: 18px;
    }
    .hotTopic ul li {
        margin-bottom: 13px;
        padding: 8px 13px;
    }
    .hotTopic ul li .image {
        width: 64px;
        height: 64px;
        margin-right: 13px;
    }
    .hotTopic ul li .text p {
        line-height: 22px;
        height: 44px;
        font-size: 15px;
    }

    .relVideo {
        margin-top: 20px;
    }
    .relEquipment {
        margin-top: 10px;
    }
    .relVideo ul {
        margin: -10px -7px;
        margin-top: 8px;
    }
    .relVideo li {
        padding: 10px 7px;
    }
    .relVideo li .image p {
        padding: 14px 10px 8px 10px;
        font-size: 15px;
    }
    .relVideo .image strong {
        max-height: 20px;
        line-height: 20px;
        overflow: hidden;
        display: block;
        font-weight: normal;
    }
    .relVideo .image:hover strong {
        max-height: 40px;
    }
    .relEquipment ul li .image {
        width: 98px;
        height: 98px;
        margin-right: 14px;
    }
    .relEquipment ul {
       margin: -14px -10px;
       margin-top: 4px;
    }
    .relEquipment ul li {
        padding: 14px 10px;
    }
    .relEquipment ul li .text b {
        height: 40px;
        line-height: 20px;
        font-size: 15px;
    }
    .relSubject ul {
        margin: 10px -15px 0 0;
    }
    .relSubject li {
        margin-top: 15px;
        padding-right: 15px;
    }
}