/* =========================================================
   悦驾汽车用品 - 系统主题 1022 样式
   设计语言（对齐参考站 kuntechtools.com）：
     深色页头/页脚 #13131b，主靛蓝 #3f48ef，深靛蓝 #2f35c9
     点缀橙红 #e75845 / #ec913c，浅灰底 #f5f7fa
   ========================================================= */
:root {
  --kt-dark: #13131b;
  --kt-dark-2: #1d1f2b;
  --kt-blue: #3f48ef;
  --kt-blue-dark: #2f35c9;
  --kt-navy: #13163e;
  --kt-accent: #e75845;
  --kt-accent-2: #ec913c;
  --kt-gray: #6b7280;
  --kt-gray-light: #9aa1ad;
  --kt-line: #e6e8ee;
  --kt-bg: #f5f7fa;
  --kt-white: #ffffff;
  --kt-radius: 10px;
  --kt-shadow: 0 10px 30px rgba(19, 22, 62, 0.08);
  --kt-container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #333;
  background: var(--kt-white);
  line-height: 1.7;
  font-size: 15px;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .25s ease; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, h5, h6 { color: var(--kt-navy); margin: 0 0 14px; font-weight: 700; line-height: 1.3; }

.container { width: 100%; max-width: var(--kt-container); margin: 0 auto; padding: 0 15px; }
.row { display: flex; flex-wrap: wrap; margin: 0 -15px; }
[class*="col-"] { padding: 0 15px; }
.col-12 { width: 100%; }
.col-6 { width: 50%; }
.col-4 { width: 33.3333%; }
.col-3 { width: 25%; }
.col-8 { width: 66.6667%; }
.col-9 { width: 75%; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-4 { margin-top: 24px; }
.mt-5 { margin-top: 40px; }
.mb-3 { margin-bottom: 16px; }
.py-5 { padding-top: 56px; padding-bottom: 56px; }
.py-6 { padding-top: 80px; padding-bottom: 80px; }
.bg-light { background: var(--kt-bg); }
.bg-dark { background: var(--kt-dark); color: #fff; }

/* 英文小标题（ABOUT US / OUR ADVANTAGE 等） */
.eyebrow {
  color: #0487f9;
}

/* 区块标题 */
.section { padding: 72px 0; }
.section-title { margin-bottom: 44px; display: flex; align-items: center; justify-content: center; gap: 10px; }
.section-title .eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 600;
}
.section-title h2 {
  font-size: 30px;
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
}
.section-title .title {
  font-size: 30px;
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
  font-weight: 700;
}
.section-title h2::after,
.section-title .title::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 54px;
  height: 3px;
  border-radius: 3px;
  background: var(--kt-blue);
}
.section-title.text-left h2::after,
.section-title.text-left .title::after { left: 0; transform: none; }
.section-title.stack { flex-direction: column; gap: 6px; }
.section-title.stack .eyebrow { color: var(--kt-blue); font-size: 14px; letter-spacing: 2px; text-transform: uppercase; font-weight: 600; }
.section-title.stack .title { font-size: 30px; font-weight: 700; padding-bottom: 14px; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .25s ease;
}
.btn-theme { background: var(--kt-blue); color: #fff; }
.btn-theme:hover { background: var(--kt-blue-dark); color: #fff; }
.btn-outline { border-color: var(--kt-blue); color: var(--kt-blue); background: transparent; }
.btn-outline:hover { background: var(--kt-blue); color: #fff; }
.btn-light { background: #fff; color: var(--kt-navy); }
.btn-light:hover { background: var(--kt-blue); color: #fff; }

/* 页头（对齐参考站：深色背景 #13131b，无 top-bar，导航 5 等分） */
#site-header {
  background: #13131b;
  position: sticky;
  top: 0;
  z-index: 1000;
}
#header-wrap { background: #13131b; }
#site-header .navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
#site-header .logo img { height: 46px; width: auto; }
#site-header .nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: flex-end;
  margin: 0 16px;
  gap: 0;
}
#site-header .nav .nav-item {
  flex: 0 0 20%;
  max-width: 200px;
  text-align: center;
}
#site-header .nav .nav-item > a {
  display: block;
  padding: 8px 0;
  color: #f3f3f3;
  font-size: 15px;
  font-weight: 400;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color .25s ease;
}
#site-header .nav .nav-item > a:hover,
#site-header .nav .nav-item.active > a { color: #0487f9; }

/* 头部右上角：社媒图标 + 多语言切换（区别点） */
.header-right { display: flex; align-items: center; gap: 24px; }
.change-language .sdsp-lang-toggle {
  color: #f3f3f3;
  font-size: 14px;
  white-space: nowrap;
  transition: color .25s ease;
}
.change-language .sdsp-lang-toggle:hover { color: #0487f9; }
.change-language .sdsp-lang-toggle i { margin-right: 4px; }
.sdsp-lang-switch { position: relative; }
.sdsp-lang-switch .dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 1200;
  background: #1d1f2b;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 8px;
  padding: 6px 0;
  min-width: 120px;
}
.sdsp-lang-switch .dropdown-menu a { color: #f3f3f3; display: block; padding: 8px 16px; font-size: 14px; text-align: center; }
.sdsp-lang-switch .dropdown-menu a:hover { background: rgba(255,255,255,.08); color: #0487f9; }
.sdsp-lang-switch.open .dropdown-menu { display: block; }

.sdsp-social-list { display: flex; gap: 8px; }
.sdsp-social-list > li { margin: 0; }
.sdsp-social-list a {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%; color: #fff; font-size: 12px;
  background: rgba(255,255,255,.08);
  transition: background .25s ease;
}
.sdsp-social-list a:hover { background: #0487f9; }
.social-facebook a { background: #1877f2 !important; }
.social-linkedin a { background: #0a66c2 !important; }
.social-whatsapp a { background: #25d366 !important; }
.social-youtube a { background: #ff0000 !important; }
.social-instagram a { background: linear-gradient(135deg,#f9ce34,#ee2a7b,#6228d7) !important; }
.social-tiktok a { background: #000 !important; }
.social-twitter a { background: #1da1f2 !important; }
.social-skype a { background: #00aff0 !important; }

.navbar-toggler { display: none; background: none; border: 0; color: #fff; font-size: 22px; cursor: pointer; }

/* ============ 首页横幅 ============ */
.kt-hero { position: relative; height: 700px; overflow: hidden; background: #13131b; }
.kt-hero .slide {
  position: absolute; inset: 0;
  opacity: 0; transition: opacity .8s ease;
  background-size: cover; background-position: center;
}
.kt-hero .slide.active { opacity: 1; }
.kt-hero .hero-mask {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(19,19,27,.82) 0%, rgba(19,19,27,.35) 60%, rgba(19,19,27,.1) 100%);
}
.kt-hero .hero-content {
  position: relative; z-index: 2;
  max-width: var(--kt-container); margin: 0 auto; height: 100%;
  display: flex; flex-direction: column; justify-content: center;
  padding: 0 15px; color: #fff;
}
.kt-hero .hero-content .eyebrow { color: #0487f9; font-weight: 600; letter-spacing: 3px; margin-bottom: 12px; }
.kt-hero .hero-content h1 { color: #fff; font-size: 46px; line-height: 1.2; max-width: 720px; }
.kt-hero .hero-content p { color: #cfd3dd; font-size: 17px; max-width: 560px; margin: 18px 0 28px; }
.kt-hero .hero-dots { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 3; display: flex; gap: 10px; }
.kt-hero .hero-dots span { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,.4); cursor: pointer; }
.kt-hero .hero-dots span.active { background: #0487f9; width: 30px; border-radius: 999px; }
.kt-hero .hero-arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 46px; height: 46px; border-radius: 50%;
  background: rgba(255,255,255,.15); color: #fff;
  display: flex; align-items: center; justify-content: center; cursor: pointer; font-size: 20px;
}
.kt-hero .hero-arrow:hover { background: #0487f9; }
.kt-hero .hero-arrow.left { left: 24px; }
.kt-hero .hero-arrow.right { right: 24px; }

/* ============ 关于 ============ */
.kt-about-img { border-radius: var(--kt-radius); overflow: hidden; box-shadow: var(--kt-shadow); }
.kt-about-img img { width: 100%; height: 220px; object-fit: cover; }
.kt-about-text h2 { font-size: 28px; }
.kt-about-text .lead { color: var(--kt-gray); font-size: 16px; }
.kt-metric { display: flex; align-items: center; gap: 14px; margin-top: 18px; }
.kt-metric .num { font-size: 34px; font-weight: 800; color: var(--kt-blue); line-height: 1; }
.kt-metric .label { color: var(--kt-gray); }

/* ============ 优势 ============ */
.kt-adv { background: #fff; border: 1px solid var(--kt-line); border-radius: var(--kt-radius); padding: 30px 24px; text-align: center; transition: all .25s ease; height: 100%; }
.kt-adv:hover { transform: translateY(-6px); box-shadow: var(--kt-shadow); border-color: var(--kt-blue); }
.kt-adv .ico { width: 60px; height: 60px; border-radius: 14px; background: rgba(63,72,239,.1); color: var(--kt-blue); display: flex; align-items: center; justify-content: center; font-size: 26px; margin: 0 auto 16px; }
.kt-adv h4 { font-size: 18px; margin-bottom: 10px; }
.kt-adv p { color: var(--kt-gray); font-size: 14px; margin: 0; }

/* ============ 产品 ============ */
.kt-product-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-bottom: 36px; }
.kt-product-nav a {
  padding: 9px 22px; border-radius: 999px; border: 1px solid var(--kt-line);
  color: var(--kt-navy); font-weight: 600;
}
.kt-product-nav a:hover, .kt-product-nav a.is-current { background: var(--kt-blue); border-color: var(--kt-blue); color: #fff; }
.kt-product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding: 6px 0; }
.kt-product {
  border: 1px solid var(--kt-line); border-radius: var(--kt-radius); overflow: hidden;
  background: #fff; transition: all .25s ease; text-align: center;
}
.kt-product:hover { transform: translateY(-6px); box-shadow: var(--kt-shadow); border-color: var(--kt-blue); }
.kt-product .pic { position: relative; overflow: hidden; aspect-ratio: 1 / 1; display: flex; align-items: center; justify-content: center; padding: 8px; }
.kt-product .pic-link { display: block; width: 100%; height: 100%; }
.kt-product .pic-link img { width: 100%; height: 100%; object-fit: contain; transition: transform .4s ease; }
.kt-product:hover .pic-link img { transform: scale(1.06); }
.kt-product .pic-overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0,0,0,.78) 0%, rgba(0,0,0,.35) 55%, rgba(0,0,0,0) 100%); display: flex; flex-direction: column; align-items: center; justify-content: flex-end; padding: 20px 16px; opacity: 0; pointer-events: none; transition: opacity .3s ease; }
.kt-product:hover .pic-overlay { opacity: 1; pointer-events: auto; }
.kt-product .pic-overlay h4 { color: #fff; font-size: 15px; margin: 0 0 6px; line-height: 1.4; max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; text-shadow: 0 1px 4px rgba(0,0,0,.45); }
.kt-product .pic-overlay h4 a { color: #fff; }
.kt-product .pic-overlay .cate { color: rgba(255,255,255,.85); font-size: 12px; margin-bottom: 12px; text-shadow: 0 1px 3px rgba(0,0,0,.45); }
.kt-product .pic-overlay .more { display: inline-flex; align-items: center; gap: 6px; color: #fff; font-size: 13px; border: 1px solid rgba(255,255,255,.45); border-radius: 999px; padding: 6px 16px; transition: all .25s ease; background: rgba(0,0,0,.25); }
.kt-product .pic-overlay .more:hover { background: var(--kt-blue); border-color: var(--kt-blue); }
.kt-product .body { padding: 12px; }
.kt-product .body h4 { font-size: 14px; margin: 0; color: #333; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.kt-product .body h4 a { color: #333; }
.kt-product .body h4 a:hover { color: #0487f9; }

/* ============ 新闻 ============ */
.kt-news { border: 1px solid var(--kt-line); border-radius: var(--kt-radius); overflow: hidden; background: #fff; height: 100%; display: flex; flex-direction: column; transition: all .25s ease; }
.kt-news:hover { box-shadow: var(--kt-shadow); transform: translateY(-4px); border-color: var(--kt-blue); }
.kt-news .pic { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.kt-news .pic img { width: 100%; height: 100%; object-fit: cover; }
.kt-news .date { position: absolute; left: 16px; top: 16px; background: var(--kt-blue); color: #fff; font-size: 12px; padding: 6px 10px; border-radius: 8px; text-align: center; line-height: 1.2; }
.kt-news .body { padding: 18px; flex: 1; display: flex; flex-direction: column; }
.kt-news .body h4 { font-size: 16px; margin-bottom: 8px; }
.kt-news .body h4 a { color: var(--kt-navy); }
.kt-news .body h4 a:hover { color: var(--kt-blue); }
.kt-news .body p { color: var(--kt-gray); font-size: 13px; margin: 0 0 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.kt-news .body .more { margin-top: auto; color: var(--kt-blue); font-weight: 600; }

/* ============ 实景演示视频卡片 ============ */
.kt-demo-row { row-gap: 35px; }
.kt-demo-card { border: 1px solid var(--kt-line); border-radius: var(--kt-radius); overflow: hidden; background: #fff; height: 100%; display: flex; flex-direction: column; transition: all .25s ease; cursor: pointer; }
.kt-demo-card:hover { box-shadow: var(--kt-shadow); transform: translateY(-4px); border-color: var(--kt-blue); }
.kt-demo-card .pic { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.kt-demo-card .pic img { width: 100%; height: 100%; object-fit: cover; }
.kt-demo-card .play-btn { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,.2); opacity: 1; transition: opacity .3s ease, background .3s ease; }
.kt-demo-card:hover .play-btn { background: rgba(0,0,0,.45); }
.kt-demo-card .play-btn i { width: 56px; height: 56px; border-radius: 50%; background: var(--kt-blue); color: #fff; font-size: 20px; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(4,135,249,.4); transition: transform .25s ease; }
.kt-demo-card:hover .play-btn i { transform: scale(1.1); }
.kt-demo-card .body { padding: 16px 18px; flex: 1; display: flex; flex-direction: column; }
.kt-demo-card .body h4 { font-size: 16px; color: var(--kt-navy); margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.5; min-height: calc(16px * 1.5 * 2); }

/* 视频弹窗 */
.kt-video-modal { display: none; position: fixed; inset: 0; z-index: 9999; background: rgba(0,0,0,.85); align-items: center; justify-content: center; }
.kt-video-modal.active { display: flex; }
.kt-video-modal .modal-close { position: absolute; top: 20px; right: 30px; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 28px; cursor: pointer; z-index: 10; transition: opacity .25s; }
.kt-video-modal .modal-close:hover { opacity: .7; }
.kt-video-modal .modal-inner { position: relative; width: 90vw; max-width: 900px; aspect-ratio: 16/9; }
.kt-video-modal .modal-inner iframe,
.kt-video-modal .modal-inner video { width: 100%; height: 100%; border: none; border-radius: 8px; background: #000; }

/* ============ 联系 CTA ============ */
.kt-cta { background: linear-gradient(120deg, var(--kt-dark) 0%, #1b2a4a 100%); color: #fff; border-radius: 16px; padding: 48px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.kt-cta h3 { color: #fff; font-size: 26px; margin: 0; }
.kt-cta h3 span { color: var(--kt-accent); }

/* ============ 联系表单 ============ */
.kt-contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }

/* ============ Contact 页：地图 + 联系信息 ============ */
.kt-contact-map { display: flex; gap: 40px; align-items: stretch; }
.kt-contact-map-left { flex: 1.6; min-width: 0; }
.kt-contact-map-right { flex: 1; }
.kt-map {
  width: 100%;
  height: 460px;
  border-radius: var(--kt-radius);
  overflow: hidden;
  box-shadow: var(--kt-shadow);
  background: #e6e8ee;
}
.kt-contact-map-right .kt-info { margin-top: 8px; }
@media (max-width: 991px) {
  .kt-contact-map { flex-direction: column; }
  .kt-map { height: 320px; }
}

/* ============ Contact 页：提交表单 ============ */
.kt-contact-form { max-width: 820px; margin: 0 auto; }
.kt-contact-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 767px) {
  .kt-contact-form .form-row { grid-template-columns: 1fr; }
}
.kt-info li { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--kt-line); }
.kt-info li i { color: var(--kt-blue); font-size: 20px; width: 26px; }
.kt-info li strong { color: var(--kt-navy); }
.kt-form .form-group { margin-bottom: 16px; }
.kt-form label { display: block; margin-bottom: 6px; color: var(--kt-navy); font-weight: 600; }
.kt-form input, .kt-form textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--kt-line); border-radius: 8px; font-size: 14px; font-family: inherit;
}
.kt-form input:focus, .kt-form textarea:focus { outline: none; border-color: var(--kt-blue); }
.kt-form textarea { min-height: 130px; resize: vertical; }

/* 页脚（对齐参考站：背景 #444，logo + 联系信息 + 分隔线 + 备案区） */
.footer { background: #444444; color: #999999; }
.footer-main {
  padding: 48px 0 40px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: 40px;
}
.footer-left { justify-self: start; }
.footer-main .footer-contact {
  justify-self: start;
  text-align: left;
  display: block;
  max-width: 380px;
}
.footer-main .footer-contact .contact-block ul li span { word-break: break-word; }
.footer-main .footer-logo img { height: 78px; width: auto; }

/* Footer 社媒入口 */
.footer-social { margin-top: 24px; }
.footer-social h6 {
  color: #dddddd;
  font-size: 14px;
  font-weight: 400;
  margin-bottom: 14px;
  font-family: "Source Han Sans", Geneva, sans-serif;
}
.footer-social .social-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}
.footer-social .social-list li a {
  color: #ffffff;
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color .3s ease;
}
.footer-social .social-list li a:hover { color: var(--kt-blue); }

/* Footer 联系信息 */
.footer-main .footer-contact .contact-block h6 {
  color: #dddddd;
  font-size: 18px;
  font-weight: 400;
  margin-bottom: 16px;
  font-family: "Source Han Sans", Geneva, sans-serif;
}
.footer-main .footer-contact .contact-block ul { list-style: none; padding: 0; margin: 0; }
.footer-main .footer-contact .contact-block ul li {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 10px;
  padding: 6px 0;
  font-size: 14px;
  color: #999999;
  line-height: 1.6;
}
.footer-main .footer-contact .contact-block ul li i {
  color: #999999;
  font-size: 16px;
  width: 18px;
  text-align: center;
  margin-top: 2px;
  flex-shrink: 0;
}
.footer-main .footer-contact .contact-block ul li strong {
  color: #dddddd;
  font-weight: 600;
}
.footer-main .footer-contact .contact-block ul li a { color: #999999; }
.footer-main .footer-contact .contact-block ul li a:hover { color: #0487f9; }

/* Footer 快捷导航 */
.footer-nav { justify-self: end; min-width: 160px; }
.footer-nav h6 {
  color: #dddddd;
  font-size: 18px;
  font-weight: 400;
  margin-bottom: 16px;
  font-family: "Source Han Sans", Geneva, sans-serif;
}
.footer-nav ul { list-style: none; padding: 0; margin: 0; }
.footer-nav ul li { padding: 6px 0; }
.footer-nav ul li a {
  color: #999999;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  transition: color .3s ease;
}
.footer-nav ul li a i {
  color: #ffffff;
  margin-right: 8px;
  font-size: 12px;
}
.footer-nav ul li a:hover { color: #0487f9; }

.footer-bottom {
  background: #ffffff;
  padding: 16px 0;
  text-align: center;
  font-size: 12px;
  color: #989898;
  font-family: Tahoma, Geneva, sans-serif;
}
.footer-bottom a { color: #989898; }
.footer-bottom a:hover { color: #0487f9; }

/* 返回顶部 */
#scroll-top { position: fixed; right: 22px; bottom: 28px; z-index: 999; display: none; }
#scroll-top a { width: 44px; height: 44px; border-radius: 50%; background: #0487f9; color: #fff; display: flex; align-items: center; justify-content: center; font-size: 18px; box-shadow: var(--kt-shadow); }
#scroll-top a:hover { background: #059fe9; }

/* 详情页 */
.kt-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.kt-detail .gallery img { width: 100%; border-radius: var(--kt-radius); }
.kt-detail .info h1 { font-size: 28px; }
.kt-detail .info .desc { color: var(--kt-gray); }
.kt-content img { max-width: 100%; }
.kt-content p { margin-bottom: 14px; }

.breadcrumb { padding: 16px 0; color: var(--kt-gray); font-size: 14px; }
.breadcrumb a:hover { color: var(--kt-blue); }

/* 响应式 */
@media (max-width: 991px) {
  .kt-product-grid { grid-template-columns: repeat(2, 1fr); }
  .kt-contact-wrap, .kt-detail { grid-template-columns: 1fr; }
  .navbar-toggler { display: block; }
  .footer-main { flex-direction: column; gap: 30px; }
  .footer-nav { min-width: auto; }
  #site-header .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #13131b; flex-direction: column; padding: 12px 15px; }
  #site-header .nav.open { display: flex; }
  #site-header .nav .nav-item > a { padding: 12px 10px; }
  .header-right { margin: 10px 0 0; }
  .header-right.open { display: flex; }
}
@media (max-width: 767px) {
  .kt-hero { height: 420px; }
  .kt-hero .hero-content h1 { font-size: 30px; }
  .col-4, .col-3, .col-6, .col-8, .col-9 { width: 100%; }
  .section { padding: 48px 0; }
  .kt-product-grid { grid-template-columns: 1fr; }
  .kt-cta { padding: 28px; }
  #site-header .navbar { flex-wrap: wrap; height: auto; padding: 10px 0; }
  .header-right { width: 100%; justify-content: flex-end; margin-left: 0; }
}

/* ============ 右侧悬浮框 ============ */
#func-side {
  position: fixed;
  right: 0;
  top: 280px;
  color: #fff;
  z-index: 9997;
}
#func-side .func-side-box {
  width: 84px;
  padding: 16px 8px;
  margin-right: 16px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 50px;
  background-color: rgba(0,0,0,.2);
  backdrop-filter: blur(10px);
}
#func-side .func-side-box > div {
  height: 80px;
  margin: 4px 0;
  border-radius: 16px;
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
#func-side .func-side-box > div .func-side-item-dialog {
  position: absolute;
  top: 16px;
  right: 80px;
  padding: 12px;
  border-radius: 8px;
  background-color: rgba(0,0,0,.3);
  backdrop-filter: blur(10px);
  white-space: nowrap;
  transform: translateX(195px);
  opacity: 0;
  transition: all .4s ease;
}
#func-side .func-side-box > div .dialog-wechat {
  top: 20px;
}
#func-side .func-side-box > div .dialog-wechat img {
  width: 98px;
  height: 98px;
}
#func-side .func-side-box > div:hover .func-side-item-dialog {
  transform: translateX(0);
  opacity: 1;
}
#func-side .func-side-box .func-side-item-i {
  width: 40px;
  height: 40px;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: all .4s ease;
}
#func-side .func-side-box .func-side-item-t {
  font-size: 12px;
  transition: all .4s ease;
}
#func-side .a-hidden {
  text-decoration: none;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}
@media (max-width: 1024px) {
  #func-side.sm-disp-n { display: none !important; }
}

/* ============ 三大优势 ============ */
.kt-adv-grid { display: flex; gap: 30px; }
.kt-adv-item { flex: 1; }
.kt-adv-card { text-align: center; padding: 20px 10px; }
.kt-adv-card .kt-adv-icon {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  transition: all .4s ease;
  position: relative;
  background: #fff;
}
.kt-adv-card .kt-adv-icon img {
  width: 90%;
  height: 90%;
  object-fit: contain;
  position: absolute;
  inset: 0;
  margin: auto;
  transition: all .4s ease;
}

/* 英文小标题 + 中文标题上下两行 */
.kt-stack-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
}
.kt-stack-title .eyebrow,
.kt-about-text .eyebrow {
  display: block;
  width: 100%;
  color: #0487f9;
  margin-bottom: 0;
  font-size: 16px;
  letter-spacing: 1px;
  font-family: "Trebuchet MS", Helvetica, sans-serif;
  font-weight: 700;
  text-transform: uppercase;
}
.kt-stack-title h2 {
  display: block;
  width: 100%;
  margin: 0;
  font-size: 40px;
  color: #13163e;
  position: relative;
  padding-bottom: 14px;
}
.kt-stack-title h2::after {
  background: #0487f9;
}
.kt-stack-title.text-left {
  align-items: flex-start;
  text-align: left;
}
.kt-stack-title.text-left h2::after {
  left: 0;
  transform: none;
}

/* 三大优势 section-title */
.kt-adv-card .kt-adv-icon .icon-default { opacity: 1; visibility: visible; }
.kt-adv-card .kt-adv-icon .icon-hover { opacity: 0; visibility: hidden; }
.kt-adv-card:hover .kt-adv-icon { background: #fff; }
.kt-adv-card:hover .kt-adv-icon .icon-default { opacity: 0; visibility: hidden; }
.kt-adv-card:hover .kt-adv-icon .icon-hover { opacity: 1; visibility: visible; }
.kt-adv-card h4 { font-size: 20px; color: #101127; margin-bottom: 16px; font-weight: 700; }
.kt-adv-card .kt-adv-desc { color: #777; font-size: 16px; line-height: 2; margin: 0; }
.kt-adv-card .kt-adv-desc-en { color: #777; font-size: 14px; line-height: 2; margin: 0; }

/* ============ 关于我们 ============ */
.kt-about-row { display: flex; align-items: stretch; gap: 48px; }
.kt-about-left {
  flex: 0 0 46%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
}
.kt-about-right { flex: 1 1 0; min-width: 0; }
.kt-about-video {
  flex: 1;
  width: 100%;
  height: 100%;
  min-height: 100%;
  border-radius: 8px;
  overflow: hidden;
}
.kt-about-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
  background: #000;
  display: block;
}
.kt-about-text { display: flex; flex-direction: column; }
.kt-about-text h2 { font-size: 36px; color: #13163e; font-weight: 700; margin-bottom: 16px; line-height: 1.35; }
.kt-about-text .lead { color: #666; font-size: 15px; line-height: 1.9; margin: 0 0 8px; }
.kt-about-text .lead-en { color: #666; font-size: 15px; line-height: 1.9; margin: 0 0 20px; }
.kt-about-points { list-style: none; padding: 0; margin: 0 0 24px; }
.kt-about-points li { display: flex; align-items: flex-start; gap: 12px; padding: 6px 0; font-size: 14px; line-height: 1.6; }
.kt-about-points li .kt-about-check { width: 23px; height: 23px; flex-shrink: 0; margin-top: 1px; }
.kt-about-points li span { color: #666; }
.kt-about-points li strong { color: #333; font-weight: 700; }
.kt-about-text .btn-theme { background: #0487f9; border-color: #0487f9; }
.kt-about-text .btn-theme:hover { background: #0378df; border-color: #0378df; }

/* ============ 留言表单 ============ */
.kt-form-section { background-size: cover; background-position: center; padding: 80px 0; position: relative; }
.kt-form-section::before { content: ""; position: absolute; inset: 0; background: rgba(255,255,255,.85); }
.kt-form-section .container { position: relative; z-index: 1; }
.kt-form-row { display: flex; align-items: center; gap: 60px; }
.kt-form-left { flex: 1; }
.kt-form-left h2 { font-size: 48px; color: #13163e; margin-bottom: 10px; font-weight: 700; }
.kt-form-left .en { font-size: 22px; color: #999; font-family: Tahoma, Geneva, sans-serif; margin-bottom: 20px; letter-spacing: 1.5px; }
.kt-form-left p { font-size: 20px; color: #666; margin-bottom: 6px; }
.kt-form-right { flex: 1; }
.kt-form-right .kt-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.kt-form-right .kt-form .form-group { margin-bottom: 16px; }
.kt-form-right .kt-form input,
.kt-form-right .kt-form textarea {
  width: 100%; padding: 12px 14px; border: 1px solid #e6e8ee; border-radius: 6px;
  font-size: 14px; font-family: inherit; background: #fff;
}
.kt-form-right .kt-form input:focus,
.kt-form-right .kt-form textarea:focus { outline: none; border-color: var(--kt-blue); }
.kt-form-right .kt-form textarea { min-height: 100px; resize: vertical; }
.kt-form-right .kt-form button { width: 100%; padding: 14px; border-radius: 6px; font-size: 16px; }

@media (max-width: 991px) {
  .footer-main {
    grid-template-columns: 1fr;
    justify-items: stretch;
    gap: 32px;
  }
  .footer-left {
    justify-self: center;
    text-align: center;
  }
  .footer-logo { text-align: center; }
  .footer-logo img { margin: 0 auto; display: block; }
  .footer-main .footer-contact,
  .footer-nav {
    justify-self: start;
    text-align: left;
    width: 100%;
  }
  .footer-main .footer-contact .contact-block,
  .footer-main .footer-contact .contact-block ul {
    text-align: left;
  }
  .footer-main .footer-contact .contact-block ul li { justify-content: flex-start; }
  .footer-social .social-list { justify-content: center; }
  .footer-nav ul { text-align: left; }
  .footer-nav ul li a { justify-content: flex-start; }
  .kt-form-row { flex-direction: column; gap: 30px; }
  .kt-form-left h2 { font-size: 32px; }
}
@media (max-width: 767px) {
  .kt-form-right .kt-form .form-row { grid-template-columns: 1fr; }
  .kt-adv-grid { flex-direction: column; }
  .kt-about-row { flex-direction: column; gap: 32px; align-items: stretch; }
  .kt-about-left { flex: 1 1 auto; max-width: 100%; width: 100%; }
  .kt-about-video { flex: none; min-height: 0; aspect-ratio: 16 / 9; height: auto; }
  .kt-about-text h2 { font-size: 30px; }
}

/* ============ About 页 ============ */
.kt-hero-page { height: 400px; }
.kt-hero-page .kt-hero-center {
  align-items: center;
  text-align: center;
}
.kt-hero-page .kt-hero-center h1 {
  max-width: none;
  font-size: 40px;
}

.kt-about-intro-row { align-items: center; gap: 54px; }
.kt-about-intro-row .kt-about-left { flex: 0 0 52%; max-width: 620px; }
.kt-about-intro-row .kt-about-right { flex: 1 1 0; min-width: 0; }
.kt-about-intro-row .kt-about-img {
  border-radius: var(--kt-radius);
  overflow: hidden;
  box-shadow: var(--kt-shadow);
}
.kt-about-page .kt-about-img img {
  width: 100%;
  height: 350px;
  object-fit: cover;
  display: block;
}
.kt-about-text h2 {
  font-size: 40px;
  color: #13163e;
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 20px;
}
.kt-about-intro-content .kt-content,
.kt-about-intro-content p {
  color: #666;
  font-size: 14px;
  line-height: 2;
  margin: 0 0 8px;
  text-align: justify;
}
.kt-about-intro-content p.en,
.kt-about-intro-content .kt-content p + p {
  color: #666;
  font-size: 14px;
  line-height: 2;
}

.section.kt-about-pillars-section {
  padding: 0;
  min-height: 220px;
  display: flex;
  align-items: center;
}
.section.kt-about-pillars-section > .container {
  width: 100%;
}
.kt-about-pillars {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  width: 100%;
}
.kt-about-pillar {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 10px;
}
.kt-about-pillar .keyword {
  font-size: 54px;
  color: #13163e;
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 12px;
  font-family: "Times New Roman", Times, serif;
}
.kt-about-pillar .subtitle {
  color: #999;
  font-size: 16px;
  line-height: 1.5;
  margin: 0;
}

.kt-about-service-section { padding-top: 72px; }
.kt-about-service-row { align-items: center; gap: 48px; }
.kt-about-service-row .kt-about-left { flex: 1 1 0; min-width: 0; }
.kt-about-service-row .kt-about-right { flex: 0 0 48%; max-width: 589px; }
.kt-about-service-row .kt-about-img {
  border-radius: var(--kt-radius);
  overflow: hidden;
  box-shadow: var(--kt-shadow);
}
.kt-about-service-row .kt-about-text h2 {
  font-size: 40px;
  color: #13163e;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}
.kt-about-service-row .kt-about-text .kt-content,
.kt-about-service-row .kt-about-text p {
  color: #666;
  font-size: 14px;
  line-height: 2;
  margin: 0 0 8px;
  text-align: justify;
}

@media (max-width: 991px) {
  .kt-about-intro-row,
  .kt-about-service-row { flex-direction: column; gap: 32px; }
  .kt-about-intro-row .kt-about-left,
  .kt-about-service-row .kt-about-right { flex: 1 1 auto; max-width: 100%; width: 100%; }
  .kt-about-pillars { flex-wrap: wrap; gap: 32px; }
  .kt-about-pillar { flex: 1 1 100%; }
  .kt-about-pillar .keyword { font-size: 40px; }
  .kt-about-text h2 { font-size: 32px; }
  .kt-about-service-row .kt-about-text h2 { font-size: 32px; }
}
@media (max-width: 767px) {
  .kt-hero-page { height: 280px; }
  .kt-hero-page .kt-hero-center h1 { font-size: 28px; }
}