:root{
  /* 品牌主色 */
  --red-900:#8f000b;
  --red-800:#b3000d;
  --red-600:#e50011;
  --red-400:#ff4d5a;
  --red-50:#fff0f1;

  /* 中性色 */
  --ink:#333333;
  --text:#666666;
  --muted:#999999;
  --line:#e8e8e8;
  --bg:#f7f8fa;
  --white:#fff;

  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.05),0 6px 18px rgba(0,0,0,.04);
  --shadow-md:0 10px 34px rgba(0,0,0,.08);
  --shadow-lg:0 20px 52px rgba(0,0,0,.12);

  --container:1220px;
  --ease:cubic-bezier(.4,0,.2,1);
}

/* ===================== 全局基础覆盖 ===================== */
.appx .nav .nav-ul .nav-li .nav-a{color:#333;}
.appx .nav .nav-ul .nav-li.active .nav-a{color:#e50011;}
.appx .nav .nav-ul .nav-li.active .icon-right:after{border-color:#e50011;}
.appx .icon-sousuo,.appx .login a{color:#333;}
.appx .login a.phone{color:#e50011;}
.appx .phone-gd-right span,.appx .phone-gd-right:before,.appx .phone-gd-right:after{background:#333}
#brand{display:none;}
.appx .nav-link,.appx .plain,.appx .tool-btn{color:#333;}

/* ===================== Banner ===================== */
.banner {
	color: #333333;
	padding: 180px 0 180px;
	text-align: left;
	position: relative;
	overflow: hidden;
}

.banner_bt{
	width: 750px;
}

.banner h1 {
	font-size: 30px;
	font-weight: 700;
	margin-bottom: 24px;
	letter-spacing: 1px;
	line-height: 1.3;
	color: #333333;
}

.banner p {
	font-size: 15px;
	opacity: 0.92;
	max-width: 820px;
	line-height: 1.8;
	font-weight: 400;
	margin-bottom:10px;
	color: #666666;
}

.banner-btn-wrap {
	display: flex;
	justify-content: flex-start;
	gap: 20px;
	flex-wrap: wrap;
	margin-top:30px;
}

.banner-btn-wrap a {
	display: inline-block;
	padding: 15px 42px;
	border-radius: 60px;
	text-decoration: none;
	font-weight: 600;
	font-size: 17px;
	transition: all 0.25s ease;
	letter-spacing: 0.3px;
}

.btn-white {
	background: #fff;
	color: #e50011;
}

.btn-white:hover {
	background: #fff0f1;
	transform: translateY(-2px);
}

.btn-outline {
	background: transparent;
	border: 2px solid #e50011;
	color: #e50011;
}

.btn-outline:hover {
	background: rgba(229, 0, 17, 0.08);
	transform: translateY(-2px);
}

/* ===================== 标题块 ===================== */
.title-block {
	text-align: center;
	margin-bottom: 52px;
}

.title-block h2 {
	font-size: 32px;
	color: #333333;
	font-weight: 700;
	position: relative;
	display: inline-block;
	letter-spacing: 0.5px;
}

.title-block p{
	font-size:15px;
	margin-top:20px;
	color:#666666;
}

/* ===================== 痛点 ===================== */
.pain-section {
	padding: 75px 0;
	background: #ffffff;
}

.pain-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
	gap: 28px;
}

.pain-item {
	background: linear-gradient(135deg, #fff5f5, #ffe9eb);
	border-left: 6px solid #e50011;
	padding: 30px 26px;
	border-radius: 16px;
	transition: all 0.3s ease;
	box-shadow: 0 4px 12px rgba(229, 0, 17, 0.06);
}

.pain-item:hover {
	transform: translateY(-5px);
	box-shadow: 0 16px 32px rgba(229, 0, 17, 0.14);
}

.pain-item h3 {
	color: #333333;
	margin-bottom: 14px;
	font-size: 20px;
	font-weight: 700;
}

.pain-item p {
	color: #666666;
	font-size: 15px;
	line-height: 1.7;
}

/* ===================== 核心优势 ===================== */
.advantage-section {
	padding: 75px 0;
	background: #f7f8fa;
}

.adv-grid {
	display: grid;
	grid-template-columns:repeat(3, 1fr);
	gap: 28px;
}

.adv-card {
	background: #fff;
	padding: 34px 28px 30px;
	border-radius: 18px;
	box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
	transition: all 0.35s ease;
	border: 1px solid #eeeeee;
	display: flex;
	flex-direction: column;
	align-items: flex-start;
}

.adv-card:hover {
	transform: translateY(-8px);
	box-shadow: 0 18px 40px rgba(0, 0, 0, 0.10);
	border-color: rgba(229, 0, 17, 0.20);
}

.adv-icon {
	width: 60px;
	height: 60px;
	background: linear-gradient(135deg, #ffe9eb, #ffd6da);
	border-radius: 16px;
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: 18px;
	font-size: 30px;
	line-height: 1;
	box-shadow: 0 6px 14px rgba(229, 0, 17, 0.15);
	transition: all 0.3s ease;
	flex-shrink: 0;
}

.adv-card:hover .adv-icon {
	background: linear-gradient(135deg, #e50011, #b3000d);
	box-shadow: 0 10px 22px rgba(229, 0, 17, 0.38);
	transform: scale(1.05);
}

.adv-icon svg {
	width: 32px;
	height: 32px;
	stroke: #e50011;
	fill: none;
	stroke-width: 1.8;
	stroke-linecap: round;
	stroke-linejoin: round;
	transition: stroke 0.3s ease;
}

.adv-card:hover .adv-icon svg {
	stroke: #fff;
}

.adv-card h3 {
	color: #333333;
	margin-bottom: 14px;
	font-size: 20px;
	font-weight: 700;
	line-height: 1.4;
}

.adv-card p {
	color: #666666;
	font-size: 15px;
	line-height: 1.75;
}

/* ===================== 三大产品系列 ===================== */
.product-section {
	padding: 75px 0;
	background: var(--bg);
}

/* ---------- 产品总述 ---------- */
.section{
	padding: 76px 0;
}

#selection{
	background:var(--bg);
}

.section-head{
	display:flex;
	flex-wrap:wrap;
	align-items:flex-end;
	justify-content:space-between;
	gap:20px;
	margin-bottom:42px;
	padding-bottom:22px;
	border-bottom:1px solid #e8e8e8;
}

.eyebrow{
	display:block;
	font-size:12px;
	font-weight:800;
	letter-spacing:2.5px;
	color:#e50011;
	text-transform:uppercase;
	margin-bottom:10px;
}
.section-head h2{
	font-size:clamp(22px,2.6vw,30px);
	font-weight:800;
	color:#333333;
	letter-spacing:.5px;
	line-height:1.3;
}
.section-head-desc{
	max-width:470px;
	font-size:15px;
	color:#666666;
	margin-bottom:4px;
}

.overview{
	display:grid;
	grid-template-columns:1.32fr .68fr;
	gap:40px;
	align-items:start;
}
.overview-text p{
	font-size:17px;
	line-height:2.05;
	color:#666666;
}
.overview-note{
	display:flex;
	gap:14px;
	padding:24px 22px;
	background:var(--red-50);
	border-left:4px solid var(--red-600);
}
.overview-note .note-icon{
	flex-shrink:0;
	width:26px;height:26px;
	border-radius:50%;
	background:var(--red-600);
	color:#fff;
	display:grid;place-items:center;
	font-weight:800;font-size:15px;
	margin-top:2px;
}
.overview-note strong{
	display:block;
	color:var(--red-800);
	font-size:15px;
	margin-bottom:6px;
}
.overview-note p{font-size:14px;line-height:1.85;color:#666666}

/* ---------- 选型步骤 ---------- */
.steps{
	display:grid;
	grid-template-columns:repeat(5,1fr);
	gap:16px;
}
.step{
	position:relative;
	background:#fff;
	border:1px solid var(--line);
	padding:26px 20px 24px;
	transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.step:hover{
	transform:translateY(-4px);
	border-color:rgba(229,0,17,.22);
}
.step::after{
	content:"";
	position:absolute;
	top:50%;right:-13px;
	width:9px;height:9px;
	border-top:2px solid var(--red-400);
	border-right:2px solid var(--red-400);
	transform:translateY(-50%) rotate(45deg);
}
.step:last-child::after{display:none}

.step-num{
	font-size:30px;
	font-weight:800;
	line-height:1;
	letter-spacing:-1px;
	color:#ececec;
	margin-bottom:14px;
	transition:color .26s var(--ease);
}
.step:hover .step-num{color:var(--red-600)}
.step h4{
	font-size:15px;
	font-weight:700;
	color:#333333;
	margin-bottom:8px;
	line-height:1.5;
}
.step p{font-size:13px;line-height:1.75;color:var(--muted)}

/* ---------- 配套服务 ---------- */
.section--gray{background:#fff}
#service{background: #eeeff0;}
.service-grid{
	display:grid;
	grid-template-columns:repeat(3,1fr);
	gap:24px;
}
.service-card{
	background:#fff;
	border:1px solid var(--line);
	padding:32px 26px;
	transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.service-card:hover{
	transform:translateY(-4px);
	border-color:rgba(229,0,17,.20);
}

.service-icon{
	width:56px;
	height:56px;
	border-radius:16px;
	display:grid;
	place-items:center;
	font-size:22px;
	margin-bottom:18px;
	color:var(--red-600);
	background:linear-gradient(135deg,var(--red-50),#ffdfe2);
	box-shadow:inset 0 0 0 1px rgba(229,0,17,.10);
	transition:background .26s var(--ease),color .26s var(--ease),transform .26s var(--ease);
}
.service-card:hover .service-icon{
	background:linear-gradient(135deg,var(--red-800),var(--red-600));
	color:#fff;
	transform:translateY(-2px);
}

/* 第二张卡片（OEM）用深灰点缀 */
.service-card:nth-child(2) .service-icon{
	color:#333333;
	background:linear-gradient(135deg,#f5f5f5,#e9e9e9);
	box-shadow:inset 0 0 0 1px rgba(0,0,0,.06);
}
.service-card:nth-child(2):hover .service-icon{
	background:linear-gradient(135deg,#666666,#333333);
	color:#fff;
}

/* 第三张卡片（技术服务）用中灰点缀 */
.service-card:nth-child(3) .service-icon{
	color:#666666;
	background:linear-gradient(135deg,#fafafa,#efefef);
	box-shadow:inset 0 0 0 1px rgba(0,0,0,.05);
}
.service-card:nth-child(3):hover .service-icon{
	background:linear-gradient(135deg,#999999,#666666);
	color:#fff;
}

.service-card h4{
	font-size:17px;
	font-weight:700;
	color:#333333;
	margin-bottom:10px;
}
.service-card p{font-size:14px;line-height:1.85;color:#666666}

.tip-text {
	margin-top: 36px;
	color: #333333;
	background: #fff0f1;
	padding: 18px 24px;
	border-radius: 14px;
	font-size: 15px;
	line-height: 1.7;
	border-left: 5px solid #e50011;
	display: flex;
	align-items: flex-start;
	gap: 12px;
}

.tip-text .tip-icon{
	font-size: 18px;
	flex-shrink: 0;
	line-height: 1.45;
	color:#e50011;
}

.dh3 div {
	font-size: 24px;
	margin-bottom: 20px;
	font-weight: 700;
	color: #333333;
}

.dh3 ul {
	margin-top: 20px;
}

.dh3 ul li {
	margin: 10px 0;
	color: #666666;
}

/* ---------- 产品卡片 ---------- */
.prod-grid {
	display: grid;
	grid-template-columns:repeat(3, 1fr);
	gap: 30px;
}

.prod-grid#prod-grid{
	grid-template-columns:repeat(2, 1fr);
}

.prod-grid.prod2{margin-bottom:40px;}

.prod-card {
	border: 1px solid #ececec;
	overflow: hidden;
	background: #fff;
	transition: all 0.3s ease;
}

.prod-card:hover {
	transform: translateY(-6px);
	border-color:rgba(229, 0, 17, 0.20);
}

.prod-img {
	width: 100%;
	height: auto;
}
.prod-img img{
	display:block;
	width:100%;
	height:100%;
	object-fit: cover;
}

.prod-grid#prod-grid .prod-img img{
	display:block;
	width:100%;
	height:100%;
	object-fit: cover;
}

.prod-head {
	background: linear-gradient(90deg, #b3000d, #e50011);
	color: #fff;
	padding: 18px;
	font-size: 20px;
	font-weight: 700;
	text-align: center;
	letter-spacing: 0.5px;
	display:block;
}

.prod-head h3{
	overflow: hidden;
	text-overflow: ellipsis;
	display: -webkit-box;
	-webkit-line-clamp: 1;
	-webkit-box-orient: vertical;
}

.prod-body {
	padding: 26px 24px 0;
}

.prod-body ul {
	list-style: none;
	color: #666666;
	font-size: 15px;
}

.prod-body li {
	margin: 10px 0;
	padding-left: 15px;
	position: relative;
	line-height: 1.6;
}

.prod-body li::before {
	content: "?";
	color: #e50011;
	font-weight: 700;
	font-size: 20px;
	position: absolute;
	left: 0;
	top: -5px;
}

.sub-product-wrap {
	margin-top: 18px;
	padding-top: 18px;
	border-top: 1px dashed #e8e8e8;
}
.sub-product-grid {
	display: flex;
	gap: 4%;
	flex-wrap: wrap;
}
.sub-product-item {
	text-align: center;
	cursor: pointer;
	transition: transform 0.25s ease;
	width:16.5%;
	margin-bottom:4%;
}

.sub-product-item:hover {
	transform: translateY(-3px);
}

.prod-grid#prod-grid .sub-product-item{
	width:13.3%;
}

.sub-product-thumb {
	width: 100%;
	border-radius: 8px;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 20px;
	color: #999999;
	border: 1px solid var(--line);
	transition: all 0.25s ease;
	overflow: hidden;
}

.sub-product-item:hover .sub-product-thumb {
	background: linear-gradient(135deg, #fff0f1, #ffe0e3);
	border-color: rgba(229, 0, 17, 0.20);
	box-shadow: 0 6px 14px var(--shadow-md);
}

.sub-product-thumb img {
	display:block;
	width: 100%;
	height: 100%;
	object-fit: contain;
}
.sub-product-name {
	font-size: 11px;
	color: #666666;
	margin-top: 10px;
	line-height: 1.35;
	font-weight: 500;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

/* ---------- 参数表格 ---------- */
.param-wrap {
	margin-top: 55px;
	overflow-x: auto;
	border-radius: 18px;
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.param-table {
	width: 100%;
	border-collapse: collapse;
	font-size: 15px;
	min-width: 700px;
}

.param-table th,
.param-table td {
	border: 1px solid #e8e8e8;
	padding: 16px 14px;
	text-align: center;
}

.param-table th {
	background: #333333;
	color: #fff;
	font-weight: 600;
	letter-spacing: 0.5px;
	font-size: 15px;
}

.param-table td a h3{
	font-size:15px;
	color:#333333;
}
.param-table tr:nth-child(even) {
	background: #fafafa;
}

.param-table tr:hover td {
	background: #fff0f1;
}

/* ---------- 工作原理 ---------- */
.principle-section {
	padding: 75px 0;
	background: #f7f8fa;
}

.principle-card {
	background: #fff;
	padding: 34px 30px;
	border-radius: 18px;
	box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
	border: 1px solid #ececec;
}

.principle-img {
	width: 100%;
	height: 240px;
	background: linear-gradient(135deg, #f7f7f7, #ededed);
	border-radius: 14px;
	display: flex;
	align-items: center;
	justify-content: center;
	color: #999999;
	font-size: 15px;
	font-weight: 500;
	letter-spacing: 0.5px;
	margin-bottom: 24px;
}

.principle-card p {
	margin-bottom: 14px;
	color: #666666;
	font-size: 15px;
	line-height: 1.8;
}

.principle-card p:last-child {
	margin-bottom: 0;
}

/* ---------- 适用行业与工艺 ---------- */
.scene-section {
	padding: 75px 0;
	background: #ffffff;
}

.scene-subtitle {
	font-size: 24px;
	color: #333333;
	font-weight: 700;
	margin-bottom: 32px;
	padding-left: 16px;
	border-left: 5px solid #e50011;
	line-height: 1.3;
}

.scene-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 26px;
	margin-bottom: 60px;
}

.scene-grid:last-of-type {
	margin-bottom: 0;
}

.scene-card {
	background: #fff;
	border-radius: 18px;
	overflow: hidden;
	border: 1px solid #ececec;
	box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
	transition: all 0.35s ease;
	display: flex;
	flex-direction: column;
}

.scene-card:hover {
	transform: translateY(-8px);
	box-shadow: 0 18px 36px rgba(0, 0, 0, 0.10);
	border-color: rgba(229, 0, 17, 0.20);
}

.scene-img {
	width: 100%;
	height: auto;
	background: linear-gradient(135deg, #fff5f5, #ffe9eb);
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 48px;
	color: #999999;
	position: relative;
	overflow: hidden;
}
.scene-img::after {
	content: "";
	position: absolute;
	bottom: -30px;
	right: -30px;
	width: 100px;
	height: 100px;
	background: radial-gradient(circle, rgba(229, 0, 17, 0.08), transparent 70%);
	border-radius: 50%;
}

.scene-icon {
	font-size: 52px;
	line-height: 1;
	filter: drop-shadow(0 4px 8px rgba(229, 0, 17, 0.18));
	transition: transform 0.3s ease;
}

.scene-card:hover .scene-icon {
	transform: scale(1.12);
}

.scene-content {
	padding: 22px 22px 26px;
	flex: 1;
	display: flex;
	flex-direction: column;
}

.scene-content h4 {
	font-size: 18px;
	color: #333333;
	font-weight: 700;
	margin-bottom: 10px;
	line-height: 1.4;
}

.scene-content p {
	color: #666666;
	font-size: 14.5px;
	line-height: 1.7;
	flex: 1;
}

.scene-card.process .scene-img {
	background: linear-gradient(135deg, #f7f7f7, #ededed);
}

.scene-card.process .scene-icon {
	filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.12));
}

.scene-card.industry .scene-img img,
.scene-card.process .scene-img img{
	display:block;
	width:100%;
	height:100%;
	object-fit: cover;
}

.scene-card.process .scene-content h4 {
	color: #666666;
}

.scene-card.process {
	border-color: #ececec;
}

.scene-card.process:hover {
	border-color: #d9d9d9;
}

/* ---------- 使用限制与选型建议 ---------- */
.limit-box {
	margin-top: 40px;
	background: #fafafa;
	padding: 24px 28px;
	border-radius: 16px;
	border-left: 6px solid #e50011;
	box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}

.limit-box p {
	margin-bottom: 12px;
	color: #666666;
	font-size: 15px;
	line-height: 1.75;
}

.limit-box p:last-child {
	margin-bottom: 0;
}

.limit-box strong {
	color: #e50011;
}

/* ===================== 技术信息资料 ===================== */
.tech-section {
	padding: 70px 0;
	background: #ffffff;
}

.tech-section .section-header {
	margin-bottom: 52px;
}

.tech-section .section-title {
	font-size: 28px;
	color: #333333;
}

.tech-list {
	list-style: none;
	padding: 0;
	margin: 0;
	display: grid;
	grid-template-columns:repeat(3, 1fr);
	gap: 20px;
}

.tech-list li {
	display: flex;
	gap: 20px;
	padding: 26px 26px 24px;
	background: #fafafa;
	border: 1px solid #ececec;
	transition: all 0.3s ease;
	position: relative;
	overflow: hidden;
}

.tech-list li:hover {
	transform: translateY(-4px);
}

.tech-list-icon {
	flex-shrink: 0;
	width: 48px;
	height: 48px;
	border-radius: 12px;
	background: linear-gradient(135deg, #fff0f1, #ffdfe2);
	display: flex;
	align-items: center;
	justify-content: center;
	color: #e50011;
	font-size: 20px;
	transition: all 0.3s ease;
}

.tech-list li:hover .tech-list-icon {
	background: linear-gradient(135deg, #e50011, #b3000d);
	color: #fff;
	transform: scale(1.05);
	box-shadow: 0 6px 16px rgba(229, 0, 17, 0.28);
}

.tech-list-content {
	flex: 1;
	min-width: 0;
}

.tech-list-title {
	font-size: 16.5px;
	font-weight: 700;
	color: #333333;
	margin-bottom: 8px;
	line-height: 1.5;
	display: flex;
	align-items: flex-start;
	gap: 8px;
	transition: color 0.25s ease;
}

.tech-list li:hover .tech-list-title {
	color: #e50011;
}

.tech-list-title i {
	color: #e50011;
	font-size: 15px;
	opacity: 0.8;
	margin-top: 4px;
	flex-shrink: 0;
}

.tech-list-desc {
	font-size: 14px;
	color: #666666;
	line-height: 1.75;
	margin: 0 0 14px;
}

.tech-list-meta {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	padding-top: 12px;
	border-top: 1px dashed #e8e8e8;
	flex-wrap: wrap;
}

.tech-list-date {
	font-size: 12.5px;
	color: #999999;
	display: flex;
	align-items: center;
	gap: 6px;
	flex-shrink: 0;
}

.tech-list-date i {
	font-size: 12px;
	color: #bbbbbb;
}

.tech-list-tag{
	display:flex;
	gap:5px;
}

.tech-list-tag a{
	font-size: 12px;
	color: #999;
	background: #f8f8f8;
	padding: 4px 12px;
	border-radius: 20px;
	font-weight: 600;
	line-height: 1.5;
	transition: all 0.25s ease;
	overflow: hidden;
	text-overflow: ellipsis;
	display: -webkit-box;
	-webkit-line-clamp: 1;
	-webkit-box-orient: vertical;
}

.tech-list-tag a:hover {
	background: #e50011;
	color: #fff;
}

/* ===================== FAQ 折叠面板 ===================== */
.faq-section {
	padding: 75px 0;
	background: #fff;
}

.faq-list {
	max-width: 900px;
	margin: 0 auto;
}

.faq-item {
	background: #ffffff;
	border-radius: 16px;
	margin-bottom: 16px;
	box-shadow:var(--shadow-sm);
	overflow: hidden;
	transition: box-shadow 0.3s ease, transform 0.3s ease;
	border: 1px solid var(--line);
}

.faq-item:hover {
	box-shadow: var(--shadow-md);
}

.faq-item.active {
	box-shadow: var(--shadow-md);
	border-color: rgba(229, 0, 17, 0.20);
}

.faq-question {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 22px 28px;
	cursor: pointer;
	user-select: none;
	transition: background 0.25s ease;
	gap: 16px;
}

.faq-question:hover {
	background: #fafafa;
}

.faq-item.active .faq-question {
	background: linear-gradient(135deg, #fff0f1, #ffe0e3);
}

.faq-question h4 {
	font-size: 17px;
	color: #333333;
	font-weight: 700;
	margin: 0;
	line-height: 1.5;
	flex: 1;
}

.faq-toggle {
	width: 32px;
	height: 32px;
	border-radius: 50%;
	background: #f0f0f0;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
	transition: all 0.3s ease;
	position: relative;
}

.faq-toggle::before,
.faq-toggle::after {
	content: "";
	position: absolute;
	background: #e50011;
	border-radius: 2px;
	transition: all 0.3s ease;
}

.faq-toggle::before {
	width: 14px;
	height: 2px;
}

.faq-toggle::after {
	width: 2px;
	height: 14px;
}

.faq-item.active .faq-toggle {
	background: #e50011;
	transform: rotate(180deg);
}

.faq-item.active .faq-toggle::before {
	background: #fff;
}

.faq-item.active .faq-toggle::after {
	background: #fff;
	opacity: 0;
	transform: rotate(90deg);
}

.faq-answer {
	max-height: 0;
	overflow: hidden;
	transition: max-height 0.4s ease, padding 0.3s ease, opacity 0.3s ease;
	opacity: 0;
	padding: 0 28px;
}

.faq-item.active .faq-answer {
	max-height: 400px;
	opacity: 1;
	padding: 0 28px 26px 28px;
}

.faq-answer p {
	color: #666666;
	font-size: 15px;
	line-height: 1.8;
	margin: 0;
	padding-top: 18px;
	border-top: 1px dashed var(--line);
}

/* ===================== 转化区块 ===================== */
.convert-section {
	padding: 80px 0;
	background: linear-gradient(90deg, #b3000d, #e50011);
	color: #fff;
	text-align: center;
	position: relative;
	overflow: hidden;
}

.convert-section h2 {
	font-size: 34px;
	margin-bottom: 18px;
	font-weight: 700;
	letter-spacing: 0.5px;
	position: relative;
}

.convert-section p {
	font-size: 18px;
	margin: 0 auto 38px;
	opacity: 0.92;
	position: relative;
}

.convert-btn {
	display: inline-block;
	background: #fff;
	color: #e50011;
	padding: 18px 54px;
	border-radius: 60px;
	font-weight: 700;
	font-size: 19px;
	text-decoration: none;
	transition: all 0.25s ease;
	position: relative;
	letter-spacing: 0.5px;
}

.convert-btn:hover {
	background: #fff5f5;
	transform: translateY(-4px);
}

/* ===================== 模态框 ===================== */
.modal-overlay {
	display: none;
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: rgba(0, 0, 0, 0.55);
	backdrop-filter: blur(6px);
	z-index: 9999;
	justify-content: center;
	align-items: center;
	animation: fadeIn 0.25s ease;
}
.modal-overlay.active { display: flex; }
.modal-box {
	background: white;
	max-width: 520px;
	width: 94%;
	border-radius: 32px;
	padding: 40px 36px 36px;
	box-shadow: 0 30px 60px rgba(0,0,0,0.2);
	position: relative;
	animation: slideUp 0.3s ease;
	max-height: 96vh;
	overflow-y: auto;
}
.modal-close {
	position: absolute;
	top: 16px;
	right: 20px;
	font-size: 28px;
	background: none;
	border: none;
	color: #999999;
	cursor: pointer;
	transition: 0.2s;
	padding: 4px 8px;
	line-height: 1;
}
.modal-close:hover { color: #333333; transform: rotate(90deg); }
.modal-box h3 {
	font-size: 24px;
	font-weight: 700;
	color: #333333;
	margin-bottom: 8px;
}
.modal-box h3 i { color: #e50011; margin-right: 8px; }
.modal-box .sub {
	color: #666666;
	font-size: 15px;
	margin-bottom: 28px;
	border-bottom: 1px solid #e9edf4;
	padding-bottom: 16px;
}
.modal-box label {
	display: block;
	font-weight: 600;
	font-size: 14px;
	color: #333333;
	margin-bottom: 6px;
}
.modal-box input,
.modal-box textarea {
	width: 100%;
	padding: 12px 0;
	border: 1.5px solid #e5e5e5;
	border-radius: 14px;
	font-size: 15px;
	transition: 0.2s;
	background: #fafafa;
	margin-bottom: 18px;
	font-family: inherit;
	text-indent:10px;
}
.modal-box .szym{
	display: grid;
	gap: 40px;
	grid-template-columns: 1fr 0.5fr;
}
.modal-box .szym img{
	display: block;
	width: 100%;
	height:46px;
	border-radius: 10px;
}
.modal-box input:focus,
.modal-box textarea:focus {
	outline: none;
	border-color: #e50011;
	background: white;
	box-shadow: 0 0 0 4px rgba(229, 0, 17, 0.12);
}
.modal-box textarea { min-height: 90px; resize: vertical; }
.modal-box .btn-submit {
	width: 100%;
	padding: 14px;
	background: #e50011;
	border: none;
	border-radius: 60px;
	font-weight: 700;
	font-size: 18px;
	color: #fff;
	cursor: pointer;
	transition: 0.2s;
	box-shadow: 0 6px 18px rgba(229, 0, 17, 0.3);
}
.modal-box .btn-submit:hover {
	background: #b3000d;
	transform: translateY(-2px);
	box-shadow: 0 10px 28px rgba(229, 0, 17, 0.4);
}
.modal-box .btn-submit i { margin-right: 8px; }
.modal-box .form-footer {
	text-align: center;
	font-size: 13px;
	color: #999999;
	margin-top: 16px;
}

@keyframes fadeIn {
	from { opacity: 0; }
	to { opacity: 1; }
}
@keyframes slideUp {
	from { transform: translateY(40px); opacity: 0; }
	to { transform: translateY(0); opacity: 1; }
}

/* =========================================================
   响应式断点（全部集中在此处）
   1580px → 1380px → 1280px → 1040px → 900px（手机端）→ 768px → 680px → 480px
   ========================================================= */

/* ================= 1580px ================= */
@media (max-width:1580px){
	.banner{padding:160px 0 160px;}
	.banner_bt{width:700px;}
	.banner h1{font-size:29px;margin-bottom:22px;letter-spacing:.9px;}
	.banner p{font-size:14.5px;line-height:1.85;margin-bottom:40px;}
	.banner-btn-wrap{gap:18px;margin-top:26px;}
	.banner-btn-wrap a{padding:15px 40px;font-size:16.5px;}

	.title-block{margin-bottom:48px;}
	.title-block h2{font-size:31px;}
	.title-block p{font-size:14.5px;margin-top:18px;}

	.pain-section,
	.advantage-section,
	.product-section,
	.principle-section,
	.scene-section,
	.faq-section,
	.tech-section{padding:70px 0;}

	.pain-grid{gap:26px;}
	.pain-item{padding:29px 25px;}

	.adv-grid{gap:26px;}
	.adv-card{padding:33px 27px 29px;}

	.overview{gap:36px;}
	.overview-text p{font-size:16.5px;line-height:2;}

	.steps{gap:15px;}
	.step{padding:25px 19px 23px;}

	.service-grid{gap:23px;}
	.service-card{padding:31px 25px;}

	.prod-grid{gap:28px;}
	.prod-grid#prod-grid{gap:28px;}

	.scene-grid{gap:24px;margin-bottom:56px;}
	.scene-content{padding:21px 21px 25px;}

	.tech-list{gap:19px;}
	.tech-list li{padding:25px 24px 23px;}

	.convert-section{padding:78px 0;}
	.convert-section h2{font-size:33px;}
	.convert-section p{font-size:17px;}

	.param-wrap{margin-top:50px;}
	.param-table th,
	.param-table td{padding:15px 13px;}

	.faq-question{padding:21px 26px;}
	.faq-item.active .faq-answer{padding:0 26px 25px 26px;}
}

/* ================= 1380px ================= */
@media (max-width:1380px){
	.banner{padding:130px 0 95px;}
	.banner_bt{width:600px;}
	.banner h1{font-size:28px;}
	.banner p{font-size:14.5px;margin-bottom:42px;}
	.banner-btn-wrap a{padding:14px 38px;font-size:16px;}

	.title-block{margin-bottom:46px;}
	.title-block h2{font-size:30px;}

	.pain-section,
	.advantage-section,
	.product-section,
	.principle-section,
	.scene-section,
	.faq-section,
	.tech-section{padding:68px 0;}

	.pain-grid{gap:24px;}
	.pain-item{padding:28px 24px;}

	.adv-grid{gap:24px;}
	.adv-card{padding:32px 26px 28px;}

	.overview{gap:34px;}
	.overview-text p{font-size:16px;line-height:1.95;}

	.steps{gap:14px;}
	.step{padding:24px 18px 22px;}

	.service-grid{gap:22px;}
	.service-card{padding:30px 24px;}

	.prod-grid{gap:26px;}
	.prod-grid#prod-grid{gap:26px;}

	.scene-grid{gap:22px;margin-bottom:52px;}

	.tech-list{gap:18px;}

	.convert-section{padding:76px 0;}
	.convert-section h2{font-size:32px;}

	.param-table th,
	.param-table td{padding:15px 13px;}
}

/* ================= 1280px ================= */
@media (max-width:1280px){
	.banner{padding:120px 0 88px;}
	.banner_bt{width:560px;}
	.banner h1{font-size:26px;margin-bottom:20px;letter-spacing:.8px;}
	.banner p{font-size:14px;line-height:1.75;margin-bottom:38px;}
	.banner-btn-wrap{gap:16px;}
	.banner-btn-wrap a{padding:13px 34px;font-size:15px;}

	.title-block{margin-bottom:42px;}
	.title-block h2{font-size:28px;}
	.title-block p{font-size:14px;margin-top:16px;}

	.pain-section,
	.advantage-section,
	.product-section,
	.principle-section,
	.scene-section,
	.faq-section,
	.tech-section{padding:60px 0;}
	.section{padding:60px 0;}

	.pain-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;}
	.pain-item{padding:26px 22px;border-radius:14px;}

	.adv-grid{grid-template-columns:repeat(2,1fr);gap:20px;}
	.adv-card{padding:28px 22px 26px;}

	.section-head{margin-bottom:34px;padding-bottom:18px;}
	.section-head-desc{font-size:14px;max-width:420px;}

	.overview{grid-template-columns:1fr;gap:26px;}
	.overview-text p{font-size:15.5px;line-height:1.9;}
	.overview-note{padding:22px 20px;}

	.steps{grid-template-columns:repeat(3,1fr);gap:16px;}
	.step::after{display:none;}

	.service-grid{gap:20px;}
	.service-card{padding:28px 22px;}

	.prod-grid{gap:24px;}
	.prod-grid#prod-grid{gap:24px;}
	.prod-body{padding:24px 22px 0;}

	.scene-grid{grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:46px;}
	.scene-content{padding:20px 20px 24px;}

	.tech-list{grid-template-columns:repeat(2,1fr);gap:18px;}
	.tech-list li{padding:24px 22px 22px;}

	.convert-section{padding:68px 0;}
	.convert-section h2{font-size:28px;}
	.convert-section p{font-size:16px;margin-bottom:32px;}

	.param-wrap{margin-top:46px;}
	.param-table{font-size:14px;}
	.param-table th,
	.param-table td{padding:14px 12px;}

	.faq-question{padding:20px 24px;}
	.faq-answer{padding:0 24px;}
	.faq-item.active .faq-answer{padding:0 24px 24px 24px;}
}

/* ================= 1040px ================= */
@media (max-width:1040px){
	.steps{grid-template-columns:repeat(3,1fr)}
	.step::after{display:none}
}

/* ================= 900px（手机端） ================= */
@media (max-width:900px){
	:root{
		--radius:12px;
		--radius-sm:8px;
		--shadow-md:0 8px 24px rgba(0,0,0,.08);
		--shadow-lg:0 14px 34px rgba(0,0,0,.10);
	}

	/* ---- Banner ---- */
	.banner{
		padding:110px 0 78px;
	}
	.banner_bt{
		width:auto;
		max-width:520px;
	}
	.banner h1{font-size:22px;margin-bottom:14px;letter-spacing:.5px;}
	.banner p{font-size:13px;line-height:1.7;margin-bottom:28px;}
	.banner-btn-wrap{gap:12px;}
	.banner-btn-wrap a{padding:12px 28px;font-size:14px;}

	/* ---- 标题块 ---- */
	.title-block{margin-bottom:30px;}
	.title-block h2{font-size:22px;}
	.title-block p{font-size:13px;margin-top:12px;}

	/* ---- 区块间距 ---- */
	.pain-section,
	.advantage-section,
	.product-section,
	.principle-section,
	.scene-section,
	.faq-section,
	.convert-section,
	.tech-section{padding:46px 0;}
	.section{padding:46px 0;}

	/* ---- 痛点 ---- */
	.pain-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;}
	.pain-item{padding:20px 18px;border-radius:12px;border-left-width:4px;}
	.pain-item h3{font-size:16px;margin-bottom:8px;}
	.pain-item p{font-size:13px;line-height:1.65;}

	/* ---- 核心优势 ---- */
	.adv-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
	.adv-card{padding:22px 18px;border-radius:14px;}
	.adv-icon{width:50px;height:50px;border-radius:12px;font-size:24px;margin-bottom:14px;}
	.adv-icon svg{width:26px;height:26px;}
	.adv-card h3{font-size:16px;margin-bottom:8px;}
	.adv-card p{font-size:13px;line-height:1.65;}

	/* ---- 标题 + 总述 ---- */
	.section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px;padding-bottom:14px;}
	.section-head h2{font-size:19px;}
	.section-head-desc{font-size:13px;max-width:none;margin-bottom:0;}
	.eyebrow{font-size:11px;letter-spacing:2px;margin-bottom:8px;}

	.overview{grid-template-columns:1fr;gap:20px;}
	.overview-text p{font-size:13.5px;line-height:1.8;}
	.overview-note{padding:18px 16px;border-radius:12px;gap:10px;}
	.overview-note .note-icon{width:22px;height:22px;font-size:13px;}
	.overview-note strong{font-size:14px;}
	.overview-note p{font-size:12.5px;line-height:1.7;}

	/* ---- 选型步骤 ---- */
	.steps{grid-template-columns:repeat(2,1fr);gap:14px;}
	.step{padding:20px 16px;border-radius:12px;}
	.step-num{font-size:24px;margin-bottom:10px;}
	.step h4{font-size:14px;margin-bottom:6px;}
	.step p{font-size:12.5px;line-height:1.65;}

	/* ---- 配套服务 ---- */
	.service-grid{grid-template-columns:1fr;gap:16px;}
	.service-card{padding:22px 18px;border-radius:12px;}
	.service-icon{width:48px;height:48px;border-radius:12px;font-size:18px;margin-bottom:14px;}
	.service-card h4{font-size:15px;margin-bottom:8px;}
	.service-card p{font-size:13px;line-height:1.7;}

	/* ---- 产品卡片 ---- */
	.prod-grid,
	.prod-grid#prod-grid{grid-template-columns:1fr;gap:20px;}
	.prod-grid.prod2{margin-bottom:28px;}
	.prod-card{border-radius:14px;}
	.prod-head{padding:14px;font-size:16px;}
	.prod-body{padding:18px 16px 0;}
	.prod-body ul{font-size:13px;}
	.prod-body li{margin:8px 0;padding-left:15px;line-height:1.6;}
	.prod-body li::before{font-size:18px;top:-6px;}

	.sub-product-wrap{margin-top:14px;padding-top:14px;}
	.sub-product-item,
	.prod-grid#prod-grid .sub-product-item{width:22%;margin-bottom:4%;}
	.sub-product-name{font-size:10.5px;margin-top:8px;}

	/* ---- 参数表格 ---- */
	.param-wrap{margin-top:34px;border-radius:12px;}
	.param-table{min-width:600px;font-size:12px;}
	.param-table th,
	.param-table td{padding:11px 9px;}
	.param-table td a h3{font-size:12px;}

	/* ---- 工作原理 ---- */
	.principle-card{padding:20px 16px;border-radius:14px;}
	.principle-img{height:180px;margin-bottom:18px;font-size:13px;border-radius:12px;}
	.principle-card p{font-size:13px;line-height:1.7;margin-bottom:12px;}

	/* ---- 行业与工艺 ---- */
	.scene-subtitle{font-size:19px;margin-bottom:22px;padding-left:12px;border-left-width:4px;}
	.scene-grid{grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:34px;}
	.scene-card{border-radius:12px;}
	.scene-img{height:130px;font-size:34px;}
	.scene-icon{font-size:38px;}
	.scene-content{padding:16px 14px 18px;}
	.scene-content h4{font-size:15px;margin-bottom:7px;}
	.scene-content p{font-size:12.5px;line-height:1.6;}

	.limit-box{margin-top:26px;padding:18px 16px;border-radius:12px;border-left-width:4px;}
	.limit-box p{font-size:13px;line-height:1.7;margin-bottom:10px;}

	/* ---- 技术资料 ---- */
	.tech-section{padding:46px 0;}
	.tech-section .section-header{margin-bottom:26px;}
	.tech-section .section-title{font-size:19px;}
	.tech-list{grid-template-columns:1fr;gap:14px;}
	.tech-list li{padding:18px 16px;gap:14px;border-radius:12px;}
	.tech-list-icon{width:42px;height:42px;border-radius:10px;font-size:17px;}
	.tech-list-title{font-size:14.5px;margin-bottom:6px;}
	.tech-list-title i{font-size:13px;margin-top:3px;}
	.tech-list-desc{font-size:12.5px;line-height:1.65;margin-bottom:12px;}
	.tech-list-date{font-size:11.5px;}
	.tech-list-tag a{font-size:11.5px;padding:3px 10px;}

	.tip-text{margin-top:24px;padding:14px 16px;font-size:13px;line-height:1.65;border-radius:12px;border-left-width:4px;gap:10px;}
	.tip-text .tip-icon{font-size:16px;}

	/* ---- FAQ ---- */
	.faq-item{border-radius:12px;margin-bottom:12px;}
	.faq-question{padding:16px 18px;gap:12px;}
	.faq-question h4{font-size:14.5px;}
	.faq-toggle{width:26px;height:26px;}
	.faq-toggle::before{width:11px;}
	.faq-toggle::after{height:11px;}
	.faq-answer{padding:0 18px;}
	.faq-item.active .faq-answer{padding:0 18px 20px 18px;max-height:520px;}
	.faq-answer p{font-size:13px;line-height:1.7;padding-top:14px;}

	/* ---- 转化区 ---- */
	.convert-section{padding:52px 0;}
	.convert-section h2{font-size:21px;margin-bottom:12px;}
	.convert-section p{font-size:13.5px;margin-bottom:26px;padding:0 16px;}
	.convert-btn{padding:14px 36px;font-size:15px;}

	/* ---- 其他 ---- */
	.dh3 div{font-size:18px;margin-bottom:0;}
	.dh3 ul{margin-top:10px;}
	.dh3 ul li{font-size:12.5px;line-height:1.65;margin:8px 0;}

	.modal-box{border-radius:22px;padding:32px 24px 28px;}
	.modal-box h3{font-size:20px;}
	.modal-box .sub{font-size:14px;margin-bottom:22px;}
	.modal-box .szym{gap:20px;grid-template-columns:1fr .6fr;}
	.modal-box input,
	.modal-box textarea{font-size:14px;margin-bottom:16px;}
	.modal-box .btn-submit{font-size:16px;padding:13px;}
}

/* ================= 768px ================= */
@media (max-width: 768px) {
	.banner {
		padding: 90px 0 100px;
		background: url(/template/pc/skin/css/../images/product_phone.jpg) no-repeat bottom!important;
		background-size:cover !important;
	}

	.banner_bt{
		padding:0;
		width:auto;
	}

	.banner h1 {
		font-size: 22px;
	}

	.banner p {
		font-size: 12px;
		line-height:1.55;
	}

	.banner-btn-wrap a {
		display: block;
		width:auto;
		max-width: initial;
		margin: 0;
		padding:15px;
		font-size:13px;
		text-align: center;
	}

	.banner-btn-wrap {
		flex-direction: column;
		align-items: center;
		display: grid;
		grid-template-columns: repeat(2, 1fr);
	}

	.pain-section,
	.advantage-section,
	.product-section,
	.principle-section,
	.scene-section,
	.faq-section,
	.convert-section {
		padding: 30px 0;
	}

	.title-block h2 {
		font-size: 24px;
	}

	.prod-grid {
		grid-template-columns: 1fr;
	}

	.adv-grid{
		grid-template-columns: repeat(2, 1fr);
		gap:15px;
	}

	.limit-box{
		padding:15px;
	}

	.limit-box p{
		font-size:12px;
		line-height:1.55;
	}

	.faq-item{
		border-radius:10px;
	}

	.convert-section h2 {
		font-size: 22px;
	}

	.convert-section p {
		font-size: 12px;
		padding: 0 10px;
	}

	.convert-btn {
		padding: 16px 40px;
		font-size: 15px;
	}

	.adv-icon {
		width: 54px;
		height: 54px;
	}

	.adv-icon svg {
		width: 28px;
		height: 28px;
	}

	.scene-subtitle {
		font-size: 20px;
		margin-bottom: 24px;
	}

	.scene-grid {
		grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
		gap: 16px;
		margin-bottom: 44px;
	}

	.scene-img {
		height: 120px;
		font-size: 38px;
	}

	.scene-icon {
		font-size: 42px;
	}

	.scene-content {
		padding: 18px 16px 20px;
	}

	.scene-content h4 {
		font-size: 16px;
	}

	.scene-content p {
		font-size: 13.5px;
	}

	.faq-question {
		padding: 18px 20px;
	}

	.faq-question h4 {
		font-size: 15px;
	}

	.faq-toggle {
		width: 28px;
		height: 28px;
	}

	.faq-toggle::before {
		width: 12px;
	}

	.faq-toggle::after {
		height: 12px;
	}

	.faq-item.active .faq-answer {
		padding: 0 20px 22px 20px;
	}

	.faq-answer p {
		font-size: 12px;
		line-height:1.55;
	}

	.principle-card {
		padding: 24px 20px;
	}

	.principle-img {
		height: 180px;
	}

	.pain-item{
		padding:15px;
		border-radius:10px;
	}

	.pain-item h3{
		font-size:15px;
		margin-bottom:10px;
	}

	.pain-item p{
		font-size:12px;
		line-height:1.55;
	}
}

/* ================= 680px ================= */
@media (max-width:680px){
	.steps{grid-template-columns:1fr;}
	.step{padding:18px 16px;}
	.step-num{font-size:22px;}
}

/* ================= 480px ================= */
@media (max-width: 480px) {
	.banner{
		padding:80px 0 65%;
	}

	.banner h1 {
		font-size: 17px;
	}

	.title-block h2 {
		font-size: 18px;
	}

	.adv-card h3 {
		font-size: 15px;
	}
	.adv-card p{
		font-size:12px;
		line-height:1.55;
	}

	.prod-head {
		font-size: 13px;
		padding:10px;
	}
	.prod-body{
		padding:15px;
	}
	.prod-body ul{
		font-size:12px;
	}

	.adv-card{
		padding:15px;
		border-radius:10px;
	}

	.scene-grid {
		grid-template-columns: 1fr 1fr;
		gap: 12px;
	}

	.scene-img {
		height: 100px;
		font-size: 32px;
	}

	.scene-icon {
		font-size: 36px;
	}

	.scene-content {
		padding: 14px 12px 16px;
	}

	.scene-content h4 {
		font-size: 14px;
		margin-bottom: 6px;
	}

	.scene-content p {
		font-size: 12px;
		line-height: 1.55;
	}

	.param-wrap{
		border-radius:10px;
	}

	.tech-list li{
		flex-direction:column;
		gap:10px;
	}
	.tech-list-icon{
		width:38px;height:38px;font-size:16px;
	}

	.modal-box { padding: 28px 20px 28px; border-radius:18px; }
	.modal-box h3 { font-size: 20px; }
	.modal-box .szym{grid-template-columns:1fr;gap:12px;}
	.modal-box .szym img{height:44px;}
}