:root {
  --bg-soft: #f6f8fa;
  --border: #e0e9f5;
  --red: #e50011;
  --gray-1: #333;
  --gray-3: #888;
}


#brand { display: none; }

.appx .nav-link,
.appx .plain,
.appx .tool-btn { color: #333; }

/* ===================== 顶部 Banner ===================== */
.banner {
  color: #333;
  padding: 120px 0 120px;
  text-align: left;
  position: relative;
  overflow: hidden;
}

.banner_bt { width: 650px; }

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

.banner p {
  font-size: 15px;
  opacity: 0.92;
  max-width: 820px;
  line-height: 1.8;
  font-weight: 400;
  margin-bottom: 48px;
}

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

.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 { transform: translateY(-2px); }

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

.btn-outline:hover { transform: translateY(-2px); }

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

.title-block h2 {
  font-size: 32px;
  color: #1e0a4a;
  font-weight: 700;
  position: relative;
  display: inline-block;
  letter-spacing: 0.5px;
}

/* ===================== 按钮 ===================== */
.btn {
  display: inline-block;
  padding: 14px 36px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 17px;
  cursor: pointer;
  text-align: center;
  transition: all 0.3s ease;
}

.btn-primary {
  background: #fff;
  color: #0c3c88;
}

.btn-cta {
  display: inline-block;
  background: #fff;
  color: #0c3c88;
  padding: 15px 42px;
  border-radius: 50px;
  font-size: 19px;
  font-weight: bold;
  transition: all 0.3s ease;
}

.btn-cta:hover {
  background: #e8f0ff;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
}

/* ===================== 区块通用 ===================== */
.section { padding: 80px 0; }

.section-white { background: #f6f8fa; }

.section-gray { background: #fff; }

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-title {
  font-size: 28px;
  color: #333;
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
  font-weight: 700;
}

.section-subtitle {
  color: #666;
  margin-left: auto;
  margin-right: auto;
  font-size: 16px;
}

.block-title {
  color: #0c3c88;
  font-size: 22px;
  margin-bottom: 24px;
  padding-left: 14px;
  border-left: 5px solid #1560d0;
  font-weight: 700;
}

/* ===================== 卡片 ===================== */
.card {
  background: #ffffff;
  padding: 30px 28px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  margin-bottom: 24px;
}

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

.card p {
  color: #555;
  font-size: 15px;
}

.card ul li {
  list-style: inside;
  margin-top: 20px;
  font-size: 15px;
  color: #555;
}

/* ===================== 配图容器 ===================== */
.img-box {
  width: 100%;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 22px;
  background: #eef3fa;
}

.img-box svg {
  width: 100%;
  height: auto;
  display: block;
}

.img-box img {
  display: block;
  width: 100%;
  height: 100%;
}

/* ===================== 提示框 ===================== */
.notice {
  background: #fff0ec;
  padding: 16px 20px;
  margin-top: 20px;
  border-left: 5px solid #ff6330;
}

.notice p {
  margin: 0;
  color: #555;
  font-size: 15px;
}

.notice strong { color: #c8421b; }

.notice-lg {
  padding: 24px 26px;
  margin-top: 28px;
}

.notice-lg ul { margin-top: 20px; }

.notice-lg li {
  margin-bottom: 10px;
  color: #555;
  font-size: 15px;
}

.notice-lg li:last-child { margin-bottom: 0; }

/* ===================== 网格布局 ===================== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* ===================== 优势卡片（带图标） ===================== */
.feature-card {
  background: #fff;
  padding: 30px 24px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid #e0e9f5;
}

.feature-card:hover { transform: translateY(-5px); }

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, #e8f0fe, #d4e2fc);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 24px;
  color: #1560d0;
  transition: all 0.35s ease;
  flex-shrink: 0;
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, #1560d0, #0c3c88);
  color: #fff;
  transform: scale(1.06);
}

.feature-card h3 {
  color: #0c3c88;
  margin-bottom: 14px;
  font-size: 18px;
  line-height: 1.5;
}

.feature-card p {
  color: #555;
  font-size: 15px;
}

/* ===================== 场景 / 工艺卡片 ===================== */
.scene-card {
  background: #f6f8fa;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.scene-card:hover { transform: translateY(-5px); }

.scene-card .img-box {
  margin-bottom: 0;
  border-radius: 0;
}

.scene-card-body { padding: 20px 22px 24px; }

.scene-card-body h4 {
  color: #0c3c88;
  font-size: 17px;
  margin-bottom: 10px;
  line-height: 1.5;
  font-weight: 700;
}

.scene-card-body p {
  color: #666;
  font-size: 14px;
}

/* ===================== 产品板块 ===================== */
.product-section {
  padding: 80px 0;
  background: #fff;
}

.product-fafafa { background: #f6f8fa; }

.prod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 30px;
}

.prod-card {
  border: 1px solid #e2e9f2;
  overflow: hidden;
  background: #fff;
  transition: all 0.3s ease;
}

.prod-card:hover {
  transform: translateY(-6px);
  border-color: #cbd9ef;
}

.prod-img {
  width: 100%;
  height: auto;
}

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

.prod-head {
  background: linear-gradient(90deg, #0d3b80, #1652bc);
  color: #fff;
  padding: 18px;
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.5px;
  display: block;
}

.prod-body { padding: 26px 24px 30px; }

.prod-body ul {
  list-style: none;
  color: #2c3d55;
  font-size: 14px;
}

.prod-body li {
  margin: 10px 0;
  padding-left: 20px;
  position: relative;
  line-height: 1.4;
}

.prod-body li::before {
  content: "?";
  color: #1652bc;
  font-weight: 700;
  font-size: 20px;
  position: absolute;
  left: 0;
  top: -5px;
}

/* ===================== 产品分类板块 ===================== */
.category-section {
  margin-bottom: 48px;
  margin-top: 30px;
}

.category-section:last-of-type { margin-bottom: 0; }

/* ---------- 供电方式卡片 ---------- */
.supply-card {
  background: #fff;
  border-radius: 14px;
  padding: 28px 26px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  border: 1px solid #e8eef7;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.supply-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
}

.supply-card-a1::before {
  background: linear-gradient(90deg, #1560d0, #4a9bff);
}

.supply-card-a2::before {
  background: linear-gradient(90deg, #ff6330, #ffa06b);
}

.supply-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(12, 60, 136, 0.12);
}

.supply-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.supply-card-head h4 {
  font-size: 19px;
  color: #0c3c88;
  font-weight: 700;
  line-height: 1.4;
}

.supply-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.supply-badge-a1 {
  background: #e8f0ff;
  color: #1560d0;
}

.supply-badge-a2 {
  background: #fff0ec;
  color: #ff6330;
}

/* 规格列表 */
.supply-specs {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  border-top: 1px dashed #e0e8f2;
}

.supply-specs li p {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed #e0e8f2;
  font-size: 14.5px;
}

.supply-specs li p:last-child { border-bottom: none; }

.spec-label {
  color: #888;
  flex-shrink: 0;
}

.spec-value {
  color: #0c3c88;
  font-weight: 600;
  text-align: right;
  line-height: 1.6;
}

/* 代表型号 */
.supply-models {
  background: #f7f9fc;
  border-radius: 10px;
  padding: 16px 18px;
}

.models-label {
  font-size: 13px;
  color: #888;
  margin-bottom: 10px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.model-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.model-tag {
  display: inline-block;
  padding: 5px 12px;
  background: #fff;
  color: #1560d0;
  border: 1px solid #d6e4f7;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.25s ease;
}

.model-tag:hover {
  background: #1560d0;
  color: #fff;
  border-color: #1560d0;
  transform: translateY(-2px);
}

/* ===================== 技术信息资料 ===================== */
.tech-section {
  padding: 70px 0;
  background: #f6f8fa;
}

.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: #fff;
  border: 1px solid #e8eef7;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.tech-list li:hover {
  border-color: #c9dbf5;
  transform: translateY(-4px);
}

.tech-list-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, #e8f0fe, #d4e2fc);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #1560d0;
  font-size: 20px;
  transition: all 0.3s ease;
}

.tech-list li:hover .tech-list-icon {
  background: linear-gradient(135deg, #1560d0, #0c3c88);
  color: #fff;
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(21, 96, 208, 0.3);
}

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

.tech-list-title {
  font-size: 16.5px;
  font-weight: 700;
  color: #333;
  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: #1560d0; }

.tech-list-title i {
  color: #1560d0;
  font-size: 15px;
  opacity: 0.8;
  margin-top: 4px;
  flex-shrink: 0;
}

.tech-list-desc {
  font-size: 14px;
  color: #888;
  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 #e0e9f5;
  flex-wrap: wrap;
}

.tech-list-date {
  font-size: 12.5px;
  color: #888;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.tech-list-date i {
  font-size: 12px;
  color: #888;
}

.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: #1560d0;
  color: #fff;
}

/* ===================== 提示文字 ===================== */
.tip-text {
  margin-top: 30px;
  color: #333;
  background: #f6f8fa;
  padding: 18px 24px;
  font-size: 15px;
  line-height: 1.7;
  border-left: 5px solid #1652bc;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.tip-text#tip-text { background: #fff; }

.tip-text .tip-icon {
  font-size: 18px;
  flex-shrink: 0;
  line-height: 1.45;
  color: #1652bc;
}

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

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

.dh3 ul li { margin: 3px 0; }

/* ===================== 场景类型卡片 ===================== */
.scene-type-card {
  background: #fff;
  padding: 20px;
  border: 1px solid #e8eef7;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.scene-type-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.scene-type-card:hover { transform: translateY(-5px); }

.scene-type-card:hover::after { opacity: 1; }

.scene-type-home::after {
  background: linear-gradient(90deg, #6bc7a0, #3ea87a);
}

.scene-type-medical::after {
  background: linear-gradient(90deg, #4a9bff, #1560d0);
}

.scene-type-industry::after {
  background: linear-gradient(90deg, #ffa06b, #ff6330);
}

.scene-type-lab::after {
  background: linear-gradient(90deg, #a78bfa, #7c5ce0);
}

.scene-type-top { margin-bottom: 16px; }

.scene-type-icon {
  display: block;
  width: 100%;
  height: 160px;
  overflow: hidden;
  margin-bottom: 20px;
}

.scene-type-icon img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scene-type-top h4 {
  font-size: 17px;
  color: #0c3c88;
  font-weight: 700;
  line-height: 1.4;
}

.scene-type-desc {
  color: #666;
  font-size: 14px;
  line-height: 1.75;
  flex-grow: 1;
  margin-bottom: 18px;
}

.scene-type-footer {
  padding-top: 14px;
  border-top: 1px dashed #e0e8f2;
}

.scene-type-tag {
  display: inline-block;
  font-size: 12.5px;
  color: #1560d0;
  background: #f0f5fc;
  padding: 5px 12px;
  border-radius: 20px;
  font-weight: 600;
  line-height: 1.5;
}

.scene-type-home .scene-type-tag {
  color: #1f8a5f;
  background: #e6f7f0;
}

.scene-type-industry .scene-type-tag {
  color: #c8421b;
  background: #fff0ec;
}

.scene-type-lab .scene-type-tag {
  color: #6d4dc4;
  background: #f0ecff;
}

/* ===================== 表格 ===================== */
.param-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

thead th {
  padding: 16px 14px;
  text-align: center;
  background: #0c3c88;
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
}

table td a h3 { font-size: 15px; }

tbody td {
  padding: 15px 14px;
  text-align: center;
  font-size: 15px;
  color: #444;
  border-bottom: 1px solid #eef2f7;
}

tbody tr:nth-child(even) { background: #f7f9fc; }

tbody tr:hover { background: #eef4ff; }

tbody tr:last-child td { border-bottom: none; }

tbody tr:hover a { color: #e50011; }

.table-note {
  margin-top: 30px;
  color: #666;
  font-size: 14px;
  padding: 16px 20px;
  border-left: 4px solid #1560d0;
  background: #f6f8fa;
}

/* ===================== 常见咨询问题 ===================== */
#ask {
  background: var(--bg-soft);
  padding: 80px 0;
}

.ask-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.ask-card {
  background: #fff;
  padding: 24px 22px;
  transition: all .28s;
  border: 1px solid #eee;
}

.ask-card:hover {
  border-color: var(--border);
  transform: translateY(-3px);
}

.ask-card h4 {
  font-size: 15px;
  color: var(--gray-1);
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ask-card h4 em {
  color: var(--red);
  font-size: 14px;
  flex-shrink: 0;
}

.ask-card p {
  font-size: 13px;
  color: var(--gray-3);
  line-height: 1.8;
}

/* ===================== CTA 区域 ===================== */
.cta-section {
  padding: 70px 0;
  background: linear-gradient(135deg, #0c3c88 0%, #1560d0 100%);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  pointer-events: none;
}

.cta-section h2 {
  font-size: 30px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-section p {
  margin: 0 auto 32px;
  font-size: 18px;
  opacity: 0.95;
  position: relative;
  z-index: 1;
}

.cta-section .btn-cta {
  position: relative;
  z-index: 1;
}

/* ===================== 模态框 ===================== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 42, 92, 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: #94a3b8;
  cursor: pointer;
  transition: 0.2s;
  padding: 4px 8px;
  line-height: 1;
}

.modal-close:hover {
  color: #333;
  transform: rotate(90deg);
}

.modal-box h3 {
  font-size: 24px;
  font-weight: 700;
  color: #333;
  margin-bottom: 8px;
}

.modal-box h3 i {
  color: #e50011;
  margin-right: 8px;
}

.modal-box .sub {
  color: #64748b;
  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: #1e293b;
  margin-bottom: 6px;
}

.modal-box input,
.modal-box textarea {
  width: 100%;
  padding: 12px 0;
  border: 1.5px solid #e2e8f0;
  border-radius: 14px;
  font-size: 15px;
  transition: 0.2s;
  background: #f8fafc;
  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(255, 179, 71, 0.15);
}

.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: #9b000c;
  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: #94a3b8;
  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（全部集中在此处，由大到小）
   ============================================================ */

/* ---------- ≤ 1380px ---------- */
@media (max-width: 1380px) {
  .container { max-width: 1160px; }

  .banner { padding: 110px 0; }
  .banner h1 { font-size: 28px; }
  .banner p { font-size: 14.5px; }

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

  .section { padding: 72px 0; }
  .product-section { padding: 72px 0; }
  .cta-section { padding: 64px 0; }

  .prod-grid { gap: 26px; }
  .tech-list { gap: 18px; }
}

/* ---------- ≤ 1280px ---------- */
@media (max-width: 1280px) {
  .container { max-width: 1080px; }

  .banner { padding: 100px 0; }
  .banner h1 { font-size: 26px; margin-bottom: 20px; }
  .banner p { font-size: 14px; margin-bottom: 40px; }
  .banner-btn-wrap a { padding: 14px 36px; font-size: 16px; }

  .title-block { margin-bottom: 40px; }
  .title-block h2 { font-size: 28px; }

  .section { padding: 64px 0; }
  .product-section { padding: 64px 0; }
  .tech-section { padding: 60px 0; }
  #ask { padding: 64px 0; }

  .section-title { font-size: 26px; }
  .block-title { font-size: 20px; }

  .grid-4 { grid-template-columns: repeat(3, 1fr); }
  .grid-3 { gap: 20px; }
  .grid-4 { gap: 20px; }

  .prod-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
  }

  .tech-list { gap: 16px; }
  .tech-list li { padding: 22px 22px 20px; }

  .ask-grid { gap: 18px; }
}

/* ---------- ≤ 900px（移动端 / 小屏平板） ---------- */
@media (max-width: 900px) {
  .container {
    max-width: 100%;
    padding: 0 20px;
  }

  /* Banner */
  .banner { padding: 90px 0 70px; }
  .banner h1 { font-size: 28px; }
  .banner p { font-size: 15px; margin-bottom: 36px; }

  /* 标题 */
  .title-block { margin-bottom: 32px; }
  .title-block h2 { font-size: 26px; }
  .section-title { font-size: 26px; }
  .section-header { margin-bottom: 34px; }

  /* 区块 */
  .section { padding: 60px 0; }
  .product-section { padding: 56px 0; }
  .tech-section { padding: 54px 0; }
  #ask { padding: 56px 0; }
  .cta-section { padding: 56px 0; }

  /* 通用小字号（原 992px 断点内容） */
  .hero h1 { font-size: 32px; }
  .step { padding: 15px; }
  .service-card { padding: 15px; }
  .overview-text p { font-size: 12px; line-height: 1.55; }
  .section-head { margin-bottom: 20px; }
  .overview-note { padding: 15px; }
  .overview-note p { font-size: 12px; line-height: 1.55; }
  .dh3 div { font-size: 20px; margin-bottom: 0; }
  .dh3 ul { margin-top: 10px; }
  .dh3 ul li { font-size: 12px; line-height: 1.55; }
  .section-subtitle { font-size: 12px; line-height: 1.55; }

  /* 网格 */
  .grid-3,
  .grid-4 { grid-template-columns: repeat(2, 1fr); }

  .tech-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .ask-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }

  .scene-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
  }

  /* 表格 */
  .compare-table th,
  .compare-table td { padding: 12px; font-size: 13px; }

  /* 产品 */
  .prod-grid { gap: 22px; }
  .supply-card { padding: 24px 22px; }
}

/* ---------- ≤ 768px ---------- */
@media (max-width: 768px) {
  .section { padding: 44px 0; }

  /* Banner */
  .banner {
    padding: 80px 0 65%;
    background: url(/template/pc/skin/css/../images/air_phone.jpg) no-repeat bottom !important;
    background-size: cover !important;
  }

  .banner_bt { width: auto; }
  .banner h1 { font-size: 26px; }
  .banner p {
    font-size: 13px;
    padding: 0;
    margin-bottom: 30px;
  }

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

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

  /* 通用标题 / 按钮 */
  .title-block { margin-bottom: 20px; }
  .title-block h2 { font-size: 24px; }
  .section-title { font-size: 23px; }
  .block-title { font-size: 19px; }
  .section-header { margin-bottom: 20px; }

  .btn {
    padding: 12px 28px;
    font-size: 15px;
  }

  .btn-cta {
    padding: 13px 32px;
    font-size: 17px;
  }

  /* 区块间距 */
  .pain-section,
  .advantage-section,
  .product-section,
  .compare-section,
  .scene-section,
  .faq-section,
  .convert-section { padding: 30px 0; }

  /* CTA */
  .cta-section { padding: 52px 0; }
  .cta-section h2 { font-size: 18px; }
  .cta-section p,
  .notice p { font-size: 12px; }

  .convert-section h2 { font-size: 15px; }
  .convert-section p { font-size: 12px; padding: 0 10px; }
  .convert-btn { padding: 16px 40px; font-size: 15px; }

  /* 卡片 */
  .card { padding: 24px 20px; }
  .card p { font-size: 13px; }
  .card ul li { font-size: 13px; margin-top: 10px; }

  .grid-2,
  .grid-3,
  .grid-4 { gap: 18px; }

  .grid-3,
  .grid-4 { grid-template-columns: repeat(2, 1fr); }

  .feature-card { padding: 15px; }
  .feature-icon {
    width: 50px;
    height: 50px;
    font-size: 21px;
    border-radius: 12px;
  }

  .scene-card-body { padding: 15px; }

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

  /* 产品分类 */
  .category-head {
    gap: 12px;
    margin-bottom: 22px;
    padding-bottom: 16px;
  }

  .category-icon {
    width: 40px;
    height: 40px;
    font-size: 19px;
    border-radius: 10px;
  }

  .category-head-title { font-size: 19px; }
  .category-head-desc { font-size: 13px; }

  .supply-card { padding: 24px 20px; }
  .supply-card-head h4 { font-size: 17px; }

  .supply-specs li {
    font-size: 14px;
    padding: 10px 0;
  }

  .supply-specs li p { padding: 0; }

  .category-section { margin-bottom: 38px; }

  /* 技术资料 */
  .tech-list { grid-template-columns: repeat(1, 1fr); }
  .tech-list li { padding: 15px; }
  .tech-list-title { font-size: 15px; }

  /* 场景类型卡片 */
  .scene-type-card { padding: 10px; }
  .scene-type-top h4 { font-size: 16px; }
  .scene-type-icon {
    width: 100%;
    height: 100px;
  }

  /* 行业引导条 */
  .intro-strip {
    padding: 20px 22px;
    gap: 18px;
    margin-bottom: 34px;
  }

  .intro-strip-icon {
    width: 44px;
    height: 44px;
    font-size: 22px;
  }

  .intro-strip-title { font-size: 16px; }
  .intro-strip-desc { font-size: 13px; }

  .intro-tag {
    font-size: 12px;
    padding: 5px 11px;
  }

  /* FAQ */
  .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: 14px; }

  /* 优势图标 */
  .adv-icon {
    width: 54px;
    height: 54px;
  }

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

  /* 场景卡片 */
  .scene-subtitle {
    font-size: 18px;
    margin-bottom: 20px;
  }

  .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; }

  .scene-tip {
    font-size: 14px;
    padding: 16px 18px;
  }

  /* 咨询问题 */
  .ask-grid { grid-template-columns: 1fr; }
  .ask-card { padding: 20px 18px; }

  /* 其它 */
  .hero { padding: 56px 0; }
  .hero h1 { font-size: 26px; }
  .hero p { font-size: 16px; }
}

/* ---------- ≤ 480px ---------- */
@media (max-width: 480px) {
  .container { padding: 0 16px; }

  /* Banner */
  .banner h1 { font-size: 15px; }
  .banner p { font-size: 12px; }

  .hero h1 { font-size: 22px; }
  .hero p { font-size: 15px; }

  .hero-btns { flex-direction: column; }

  .btn {
    display: block;
    width: 100%;
  }

  /* 标题 */
  .title-block h2 { font-size: 21px; }
  .section-title { font-size: 20px; }

  .adv-card h3 { font-size: 15px; }

  /* 卡片 */
  .adv-card {
    padding: 15px;
  }

  .adv-card p {
    font-size: 12px;
    line-height: 1.4;
  }

  .feature-card h3 { font-size: 16px; }
  .feature-icon {
    width: 46px;
    height: 46px;
    font-size: 19px;
    border-radius: 11px;
    margin-bottom: 14px;
  }

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

  .pain-item p {
    font-size: 12px;
    line-height: 1.4;
  }

  /* 产品 */
  .prod-head {
    font-size: 15px;
    padding: 15px;
  }

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

  .param-table th { font-size: 13px; }
  .param-table td a h3 { font-size: 12px; }

  .param-table th,
  .param-table td {
    font-size: 12px;
    padding: 12px;
  }

  /* 产品分类 */
  .supply-card-head { gap: 8px; }

  .supply-badge {
    padding: 4px 10px;
    font-size: 12px;
  }

  .supply-specs li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .spec-value { text-align: left; }

  .model-tags { gap: 6px; }

  .model-tag {
    font-size: 12px;
    padding: 4px 10px;
  }

  /* 行业引导条 */
  .intro-strip {
    flex-direction: column;
    align-items: flex-start;
  }

  .intro-strip-tags { width: 100%; }

  /* 场景 */
  .scene-card-body h4 { font-size: 16px; }

  .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;
  }

  /* 模态框 */
  .modal-box { padding: 28px 20px 28px; }
  .modal-box h3 { font-size: 20px; }
}