/* ============== Reset & Base ============== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family:
    "PingFang SC",
    "Microsoft YaHei",
    "Hiragino Sans GB",
    "Heiti SC",
    -apple-system,
    BlinkMacSystemFont,
    "Helvetica Neue",
    Arial,
    sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: #2b3a4a;
  background: #f6f9fc;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: #0c7fc2;
}
ul,
ol {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
em,
i {
  font-style: normal;
}

:root {
  --primary: #0a5e9c;
  --primary-dark: #064a7e;
  --accent: #00b3d6;
  --accent-2: #1cc7f0;
  --text: #2b3a4a;
  --text-2: #5b6b7d;
  --muted: #8a99a8;
  --bg: #f6f9fc;
  --bg-2: #ffffff;
  --line: rgba(10, 94, 156, 0.12);
  --shadow: 0 8px 30px rgba(10, 94, 156, 0.08);
  --shadow-hover: 0 18px 45px rgba(10, 94, 156, 0.18);
  --radius: 6px;
  --container: 1200px;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ============== Header ============== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.04);
  transition: all 0.3s;
}
.header-top {
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  color: #e8f3fb;
  font-size: 12.5px;
}
.header-top-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 34px;
  letter-spacing: 0.5px;
}
.header-top-links a {
  margin-left: 18px;
  opacity: 0.92;
}
.header-top-links a:hover {
  opacity: 1;
  color: #fff;
}
.header-main {
  height: 78px;
}
.header-main-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: 0 6px 16px rgba(10, 94, 156, 0.25);
}
.logo-r {
  font-size: 22px;
  font-family: Georgia, serif;
}
.logo-icon::after {
  content: "®";
  position: absolute;
  top: -2px;
  right: -4px;
  font-size: 11px;
  color: #fff;
  background: transparent;
  font-weight: 700;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}
.logo-text strong {
  font-size: 24px;
  background: linear-gradient(90deg, #ff7a18, #ffb347);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
  letter-spacing: 2px;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
  filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.05));
}
.logo-text em {
  font-size: 14px;
  color: var(--text-2);
  margin-left: 2px;
  font-weight: 500;
}
.logo-divider {
  color: #c5d3df;
  margin: 0 6px;
  font-weight: 300;
}
.logo-tag {
  color: var(--text);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.main-nav ul {
  display: flex;
  gap: 6px;
}
.main-nav a {
  display: inline-block;
  padding: 0 18px;
  height: 78px;
  line-height: 78px;
  font-size: 15px;
  color: var(--text);
  position: relative;
  font-weight: 500;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 18px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  transition: all 0.3s;
  transform: translateX(-50%);
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--primary);
}
.main-nav a:hover::after,
.main-nav a.active::after {
  width: 60%;
}

.nav-toggle {
  display: none;
  width: 34px;
  height: 34px;
  flex-direction: column;
  justify-content: space-around;
  padding: 6px;
}
.nav-toggle span {
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

/* ============== Hero ============== */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0a4f87 0%, #0a5e9c 45%, #0877a8 100%);
  color: #fff;
  padding: 80px 0 100px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-wave {
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -60px;
  height: 200px;
  background: radial-gradient(
    ellipse at center top,
    rgba(0, 179, 214, 0.25),
    transparent 70%
  );
  border-radius: 50% 50% 0 0/100% 100% 0 0;
}
.hero-bubble {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  animation: float 12s ease-in-out infinite;
}
.hero-bubble.b1 {
  width: 120px;
  height: 120px;
  top: 20%;
  left: 8%;
  animation-delay: 0s;
}
.hero-bubble.b2 {
  width: 80px;
  height: 80px;
  top: 60%;
  left: 5%;
  animation-delay: 2s;
}
.hero-bubble.b3 {
  width: 60px;
  height: 60px;
  top: 30%;
  right: 10%;
  animation-delay: 4s;
}
.hero-bubble.b4 {
  width: 140px;
  height: 140px;
  bottom: 10%;
  right: 18%;
  animation-delay: 1s;
}
.hero-bubble.b5 {
  width: 50px;
  height: 50px;
  top: 15%;
  right: 30%;
  animation-delay: 3s;
}
@keyframes float {
  0%,
  100% {
    transform: translateY(0) scale(1);
    opacity: 0.6;
  }
  50% {
    transform: translateY(-30px) scale(1.05);
    opacity: 1;
  }
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}
.hero-eyebrow {
  font-size: 12.5px;
  letter-spacing: 4px;
  opacity: 0.85;
  font-weight: 500;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.hero-title-main {
  display: block;
  font-size: 54px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 1px;
  background: linear-gradient(180deg, #ffffff 0%, #d6f0fb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 10px;
}
.hero-title-sub {
  display: block;
  font-size: 20px;
  font-weight: 500;
  opacity: 0.95;
  margin-bottom: 22px;
  letter-spacing: 2px;
}
.hero-desc {
  font-size: 15.5px;
  line-height: 1.9;
  opacity: 0.92;
  max-width: 560px;
  margin-bottom: 30px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 1px;
  transition: all 0.3s;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 8px 20px rgba(0, 179, 214, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(0, 179, 214, 0.45);
  color: #fff;
}
.btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}
.btn-outline:hover {
  background: #fff;
  color: var(--primary);
  transform: translateY(-2px);
}
.hero-points {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 24px;
  max-width: 560px;
}
.hero-points li {
  position: relative;
  padding-left: 38px;
  font-size: 14px;
  opacity: 0.92;
  line-height: 1.6;
}
.hero-points li span {
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  line-height: 28px;
  background: rgba(0, 179, 214, 0.3);
  border: 1px solid rgba(0, 179, 214, 0.6);
  border-radius: 50%;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
}
.hero-visual {
  position: relative;
}
.hero-card {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.25);
  transition: transform 0.5s;
}
.hero-card:hover {
  transform: translateY(-6px);
}
.hero-card-img {
  height: 300px;
  background-size: cover;
  background-position: center;
  position: relative;
}
.hero-card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.4));
}
.hero-card-body {
  padding: 24px 26px;
}
.hero-card-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
}
.hero-card-body p {
  font-size: 14px;
  opacity: 0.9;
  line-height: 1.7;
  margin-bottom: 14px;
}
.hero-card-tag {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(0, 179, 214, 0.25);
  border: 1px solid rgba(0, 179, 214, 0.5);
  border-radius: 30px;
  font-size: 12.5px;
}

/* ============== Section ============== */
.section {
  padding: 90px 0;
  position: relative;
}
.section-about {
  background: #fff;
}
.section-products {
  background: var(--bg);
}
.section-applications {
  background: #fff;
}
.section-advantages {
  background: linear-gradient(135deg, #f0f8fc, #e6f2f9);
}
.section-news {
  background: #fff;
}
.section-faq {
  background: var(--bg);
}
.section-friendlinks {
  background: #fff;
  padding: 60px 0;
}
.section-contact {
  background: linear-gradient(135deg, #0a4f87 0%, #0a5e9c 100%);
  color: #fff;
}
.section-contact .section-title {
  color: #fff;
}
.section-contact .section-eyebrow {
  color: #aedcef;
}
.section-contact .section-sub {
  color: rgba(255, 255, 255, 0.85);
}

.section-head {
  text-align: center;
  margin-bottom: 54px;
}
.section-eyebrow {
  font-size: 12.5px;
  letter-spacing: 4px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 10px;
  text-transform: uppercase;
}
.section-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.section-sub {
  font-size: 15px;
  color: var(--text-2);
  letter-spacing: 0.5px;
}

/* ============== About ============== */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: flex-start;
}
.about-text p {
  color: var(--text-2);
  line-height: 2;
  font-size: 14.5px;
  margin-bottom: 18px;
}
.about-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.feature-item {
  background: linear-gradient(135deg, #fff, #f1f9ff);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px 22px;
  transition: all 0.3s;
}
.feature-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.feature-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
}
.feature-num small {
  font-size: 14px;
  color: var(--text-2);
  font-weight: 500;
  margin-left: 4px;
}
.feature-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.feature-item p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.7;
}

/* ============== Products ============== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.product-card {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.product-img {
  height: 200px;
  background-size: cover;
  background-position: center;
  background-color: #eef5fa;
  position: relative;
  cursor: zoom-in;
  overflow: hidden;
}
.product-img::after {
  content: "点击查看大图";
  position: absolute;
  inset: 0;
  background: rgba(10, 94, 156, 0.7);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  letter-spacing: 1px;
  opacity: 0;
  transition: opacity 0.3s;
}
.product-img:hover::after {
  opacity: 1;
}
.product-body {
  padding: 18px 18px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.product-desc {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 12px;
}
.product-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}
.product-price {
  font-size: 13px;
  color: var(--text-2);
}
.product-price strong {
  color: #d9534f;
  font-size: 15px;
}
.product-action {
  font-size: 12.5px;
  padding: 5px 12px;
  border-radius: 30px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  color: #fff;
}

/* ============== Applications ============== */
.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.app-card {
  background: #fff;
  padding: 30px 28px;
  border-radius: 8px;
  border: 1px solid var(--line);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.app-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 0;
  background: linear-gradient(180deg, var(--accent), var(--primary));
  transition: height 0.4s;
}
.app-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.app-card:hover::before {
  height: 100%;
}
.app-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-bottom: 16px;
  font-size: 16px;
}
.app-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}
.app-card p {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.8;
}

/* ============== Advantages ============== */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.adv-item {
  background: #fff;
  padding: 30px 22px;
  border-radius: 8px;
  text-align: center;
  border: 1px solid var(--line);
  transition: all 0.3s;
}
.adv-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.adv-ico {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 22px;
  margin: 0 auto 14px;
  font-family: Georgia, serif;
}
.adv-item h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.adv-item p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.7;
}

/* ============== News ============== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.news-card {
  background: #fff;
  border-radius: 8px;
  padding: 28px 26px;
  border: 1px solid var(--line);
  transition: all 0.3s;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.news-tag {
  display: inline-block;
  font-size: 12px;
  padding: 3px 12px;
  border-radius: 30px;
  background: #e6f4fb;
  color: var(--primary);
  margin-bottom: 12px;
}
.news-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.5;
}
.news-card p {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 14px;
}
.news-date {
  font-size: 12.5px;
  color: var(--muted);
  display: block;
  border-top: 1px dashed var(--line);
  padding-top: 10px;
}

/* ============== FAQ ============== */
.faq-list {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s;
}
.faq-item:hover {
  border-color: var(--accent);
}
.faq-q {
  width: 100%;
  text-align: left;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text);
  background: #fff;
  transition: background 0.3s;
}
.faq-q:hover {
  background: #f5fbfd;
}
.faq-item.active .faq-q {
  background: #f0f9fd;
  color: var(--primary);
}
.faq-toggle {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  flex-shrink: 0;
  background: #e6f4fb;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  transition: transform 0.3s;
  line-height: 1;
}
.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  background: #f9fcfe;
}
.faq-item.active .faq-a {
  max-height: 400px;
}
.faq-a-inner {
  padding: 18px 24px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.9;
  border-top: 1px solid var(--line);
}

/* ============== Friend Links ============== */
.friendlinks {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.friendlinks li a {
  display: inline-block;
  padding: 10px 24px;
  background: #f0f6fb;
  border: 1px solid var(--line);
  border-radius: 30px;
  font-size: 14px;
  color: var(--text-2);
  transition: all 0.3s;
}
.friendlinks li a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* ============== Contact ============== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 50px;
  align-items: center;
}
.contact-info h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 15px;
}
.contact-list li:last-child {
  border-bottom: none;
}
.ci-label {
  flex-shrink: 0;
  width: 100px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 1px;
  padding-top: 2px;
}
.contact-list a {
  color: #aedcef;
}
.contact-list a:hover {
  color: #fff;
}
.contact-list em {
  color: rgba(255, 255, 255, 0.75);
  font-size: 13.5px;
  margin-left: 4px;
}
.contact-qr {
  display: flex;
  gap: 24px;
  justify-content: center;
}
.contact-qr figure {
  text-align: center;
  background: #fff;
  padding: 14px 14px 18px;
  border-radius: 10px;
  width: 170px;
}
.contact-qr img {
  width: 142px;
  height: 142px;
  object-fit: contain;
  border: 1px solid #eee;
  border-radius: 4px;
}
.contact-qr figcaption {
  margin-top: 10px;
  font-size: 13.5px;
  color: #333;
  font-weight: 500;
}

/* ============== Footer ============== */
.site-footer {
  background: #0a2942;
  color: #9bb1c4;
  padding: 60px 0 0;
  font-size: 13.5px;
}
.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 50px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .logo {
  margin-bottom: 18px;
}
.footer-brand .logo-text strong {
  font-size: 22px;
}
.footer-brand .logo-tag {
  color: #c5d3df;
  font-size: 13.5px;
}
.footer-brand p {
  line-height: 1.9;
  color: #7a8d9f;
  font-size: 13px;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.footer-col h4 {
  color: #e3edf5;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 1px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
}
.footer-col li {
  margin-bottom: 10px;
  font-size: 13px;
}
.footer-col a {
  color: #9bb1c4;
}
.footer-col a:hover {
  color: #fff;
}
.footer-bot {
  padding: 24px 0;
  text-align: center;
}
.footer-bot p {
  margin-bottom: 6px;
  font-size: 12.5px;
  color: #6c7e90;
  letter-spacing: 0.5px;
}
.footer-bot a {
  color: #9bb1c4;
}
.footer-bot a:hover {
  color: #fff;
}
.footer-cities {
  padding: 30px 0 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-cities h4 {
  color: #e3edf5;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 1px;
  position: relative;
  padding-bottom: 10px;
}
.footer-cities h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
}
.footer-city-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 6px;
}
.footer-city-list li a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  color: #9bb1c4;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  transition: all 0.25s ease;
}
.footer-city-list li a:hover {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-1px);
}

/* ============== Float Tool ============== */
.float-tool {
  position: fixed;
  right: 18px;
  bottom: 80px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ft-item {
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  transition: all 0.3s;
}
.ft-item span {
  font-size: 20px;
  line-height: 1;
}
.ft-item em {
  font-size: 11px;
  margin-top: 2px;
  color: var(--text-2);
}
.ft-item:hover {
  background: linear-gradient(135deg, var(--accent), var(--primary));
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.ft-item:hover em {
  color: #fff;
}
.ft-item:hover span {
  filter: brightness(2);
}

/* ============== Image Mask ============== */
.img-mask {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.85);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 40px;
}
.img-mask.show {
  display: flex;
}
.img-mask img {
  max-width: 90vw;
  max-height: 75vh;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.img-mask p {
  color: #fff;
  margin-top: 18px;
  font-size: 15px;
  letter-spacing: 1px;
  max-width: 80vw;
  text-align: center;
}
.img-close {
  position: absolute;
  top: 30px;
  right: 40px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 28px;
  line-height: 42px;
  text-align: center;
  transition: background 0.2s;
}
.img-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* ============== Responsive ============== */
@media (max-width: 1100px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .adv-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-main {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 900px) {
  .header-top {
    display: none;
  }
  .header-main {
    height: 64px;
  }
  .header-main-inner {
    height: 64px;
  }
  .main-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: #fff;
    border-top: 1px solid var(--line);
    display: none;
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.06);
  }
  .main-nav.show {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }
  .main-nav a {
    height: auto;
    padding: 14px 24px;
    display: block;
    border-bottom: 1px solid var(--line);
  }
  .main-nav a::after {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .logo-icon {
    width: 38px;
    height: 38px;
  }
  .logo-r {
    font-size: 18px;
  }
  .logo-text strong {
    font-size: 20px;
  }
  .logo-text em {
    font-size: 12px;
  }
  .logo-divider {
    margin: 0 3px;
  }
  .logo-tag {
    font-size: 13px;
  }
  .hero {
    padding: 50px 0 70px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-title-main {
    font-size: 38px;
  }
  .hero-title-sub {
    font-size: 16px;
  }
  .hero-desc {
    font-size: 14.5px;
  }
  .hero-card-img {
    height: 220px;
  }
  .section {
    padding: 60px 0;
  }
  .section-title {
    font-size: 26px;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .app-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .adv-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
  .news-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .contact-qr {
    justify-content: flex-start;
  }
  .footer-cols {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .float-tool {
    right: 10px;
    bottom: 60px;
  }
  .ft-item {
    width: 54px;
    height: 54px;
  }
  .hero-points {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 600px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
  .app-grid {
    grid-template-columns: 1fr;
  }
  .adv-grid {
    grid-template-columns: 1fr;
  }
  .about-features {
    grid-template-columns: 1fr;
  }
  .footer-cols {
    grid-template-columns: 1fr;
  }
  .hero-title-main {
    font-size: 30px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .btn {
    text-align: center;
  }
  .contact-qr {
    flex-wrap: wrap;
  }
  .img-close {
    top: 14px;
    right: 14px;
  }
  .header-top-links a {
    margin-left: 10px;
  }
}