/* =============================================
   可信担保官网首页样式 (homepage.css)
   Prefix: kx-  避免与全局样式冲突
   ============================================= */

/* === 基础变量 === */
:root {
  --kx-dark: #0F172A;
  --kx-dark2: #111827;
  --kx-dark3: #101820;
  --kx-red: #D71920;
  --kx-red-hover: #B91C1C;
  --kx-white: #FFFFFF;
  --kx-gray-bg: #F5F6F8;
  --kx-text: #333333;
  --kx-text-sub: #666666;
  --kx-text-light: #888888;
  --kx-container: 1200px;
  --kx-nav-h: 72px;
}

/* === 通用 === */
.kx-container {
  max-width: var(--kx-container);
  margin: 0 auto;
  padding: 0 20px;
}
.kx-section-title {
  text-align: center;
  font-size: 32px;
  font-weight: 700;
  color: var(--kx-text);
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.kx-section-subtitle {
  text-align: center;
  font-size: 16px;
  color: var(--kx-text-sub);
  margin-bottom: 50px;
}
.kx-section-title--light {
  color: #fff;
}
.kx-section-subtitle--light {
  color: rgba(255,255,255,0.7);
}

/* === 1. Header / Navigation === */
body { padding-top: 0 !important; }
.kx-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--kx-nav-h);
  background: linear-gradient(to right, #1E293B 0%, #0F172A 100%);
  z-index: 9999;
  border: none;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.kx-header .kx-container {
  display: flex;
  align-items: center;
  height: 100%;
  justify-content: space-between;
}
/* Logo */
.kx-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}
.kx-logo-img {
  height: 50px;
  width: auto;
  display: block;
  flex-shrink: 0;
}
/* Nav Menu */
.kx-nav {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 4px;
}
.kx-nav-item {
  position: relative;
}
.kx-nav-item a {
  display: block;
  padding: 0 20px;
  line-height: var(--kx-nav-h);
  color: rgba(255,255,255,0.85);
  font-size: 15px;
  text-decoration: none;
  transition: color 0.25s;
  white-space: nowrap;
}
.kx-nav-item a:hover {
  color: var(--kx-red);
}
.kx-nav-item.active a {
  color: var(--kx-red);
}
.kx-nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--kx-red);
  border-radius: 2px;
}
/* 导航下拉菜单 */
.kx-nav-dropdown { position: relative; }
.kx-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 160px;
  background: var(--kx-dark);
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  list-style: none;
  padding: 8px 0;
  margin: 0;
  z-index: 999;
}
.kx-nav-dropdown:hover > .kx-dropdown-menu { display: block; }
.kx-dropdown-menu li a {
  display: block;
  padding: 10px 20px;
  color: rgba(255,255,255,0.8);
  font-size: 14px;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.kx-dropdown-menu li a:hover {
  color: #fff;
  background: rgba(255,255,255,0.08);
}
/* CTA Button */
.kx-header-cta {
  display: inline-block;
  background: var(--kx-red);
  color: #fff !important;
  padding: 8px 22px;
  border-radius: 4px;
  font-size: 14px;
  text-decoration: none;
  transition: background 0.25s, transform 0.2s, box-shadow 0.25s;
  white-space: nowrap;
}
.kx-header-cta:hover {
  background: var(--kx-red-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(215,25,32,0.4);
  color: #fff !important;
}
.kx-header--scrolled {
  background: linear-gradient(to right, #162033 0%, #0A1022 100%);
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
}
/* Mobile toggle */
.kx-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  padding: 8px;
}

/* === 2. Hero Banner === */
.kx-hero {
  position: relative;
  height: 640px;
  margin-top: var(--kx-nav-h);
  background: linear-gradient(135deg, #0a1628 0%, #1a2744 60%, #0f1f3a 100%);
  overflow: hidden;
  display: flex;
  align-items: center;
}
.kx-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 50%, rgba(215,25,32,0.08) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}
.kx-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 600px;
  text-align: center;
}
.kx-hero-badge {
  display: inline-block;
  background: rgba(215,25,32,0.15);
  border: 1px solid rgba(215,25,32,0.4);
  color: var(--kx-red);
  font-size: 13px;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.kx-hero-title {
  font-size: 48px;
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: 2px;
}
.kx-hero-title span {
  color: var(--kx-red);
}
.kx-hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.72);
  line-height: 1.9;
  margin-bottom: 36px;
}
.kx-hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}
.kx-btn-primary {
  display: inline-block;
  background: var(--kx-red);
  color: #fff;
  padding: 13px 36px;
  border-radius: 4px;
  font-size: 15px;
  text-decoration: none;
  font-weight: 500;
  transition: background 0.25s, transform 0.2s, box-shadow 0.25s;
  border: none;
  cursor: pointer;
}
.kx-btn-primary:hover {
  background: var(--kx-red-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(215,25,32,0.35);
  color: #fff;
}
.kx-btn-outline {
  display: inline-block;
  background: transparent;
  color: #fff;
  padding: 13px 36px;
  border-radius: 4px;
  font-size: 15px;
  text-decoration: none;
  font-weight: 500;
  border: 1px solid rgba(255,255,255,0.35);
  transition: border-color 0.25s, background 0.25s, transform 0.2s;
  cursor: pointer;
}
.kx-btn-outline:hover {
  border-color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.06);
  transform: translateY(-2px);
  color: #fff;
}
/* Hero side visual */
.kx-hero-visual {
  flex-shrink: 0;
  width: 460px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.kx-hero-visual-inner {
  width: 100%;
  height: 100%;
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.kx-hero-visual-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* === Hero Advantages Bar === */
.kx-adv-bar {
  background: rgba(10,18,32,0.92);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 0;
  position: relative;
  z-index: 3;
}
.kx-adv-bar .kx-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.kx-adv-item {
  padding: 28px 20px;
  text-align: center;
  border-right: 1px solid rgba(255,255,255,0.06);
}
.kx-adv-item:last-child {
  border-right: none;
}
.kx-adv-icon {
  width: 44px;
  height: 44px;
  background: rgba(215,25,32,0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  color: var(--kx-red);
  font-size: 18px;
}
.kx-adv-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 6px;
}
.kx-adv-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
}

/* === 3. Three Advantages === */
.kx-advantages {
  padding: 90px 0;
  background: var(--kx-white);
}
.kx-adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.kx-adv-card {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.07);
  transition: transform 0.3s, box-shadow 0.3s;
}
.kx-adv-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.12);
}
.kx-adv-card-img {
  height: 180px;
  background: linear-gradient(135deg, #f0f2f8 0%, #e8ecf4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.kx-adv-card-icon {
  width: 70px;
  height: 70px;
  background: rgba(215,25,32,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--kx-red);
  font-size: 28px;
  position: relative;
  z-index: 1;
}
.kx-adv-card-icon::after {
  content: '';
  position: absolute;
  inset: -8px;
  border: 2px dashed rgba(215,25,32,0.2);
  border-radius: 50%;
}
.kx-adv-card-body {
  padding: 28px 24px;
}
.kx-adv-card-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--kx-text);
  margin-bottom: 12px;
}
.kx-adv-card-text {
  font-size: 14px;
  color: var(--kx-text-sub);
  line-height: 1.8;
}

/* === 4. Products Section === */
.kx-products {
  padding: 90px 0;
  background: var(--kx-gray-bg);
}
.kx-products-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 30px;
}
/* Left sidebar */
.kx-prod-sidebar {
  background: #fff;
  border-radius: 8px;
  padding: 28px 0;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  height: fit-content;
}
.kx-prod-sidebar-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--kx-text);
  padding: 0 24px 20px;
  border-bottom: 1px solid #f0f0f0;
  margin-bottom: 8px;
}
.kx-prod-cat {
  display: block;
  padding: 13px 24px;
  font-size: 14px;
  color: var(--kx-text-sub);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: all 0.2s;
}
.kx-prod-cat:hover {
  color: var(--kx-red);
  background: rgba(215,25,32,0.04);
  border-left-color: var(--kx-red);
}
.kx-prod-cat.active {
  color: var(--kx-red);
  background: rgba(215,25,32,0.06);
  border-left-color: var(--kx-red);
  font-weight: 600;
}
/* Right content */
.kx-prod-main {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
/* Product banner */
.kx-prod-banner {
  background: linear-gradient(135deg, #0F172A 0%, #1a2744 100%);
  border-radius: 8px;
  padding: 40px;
  position: relative;
  overflow: hidden;
}
.kx-prod-banner::after {
  content: '';
  position: absolute;
  right: -40px;
  top: -40px;
  width: 160px;
  height: 160px;
  background: rgba(215,25,32,0.1);
  border-radius: 50%;
}
.kx-prod-banner-title {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.kx-prod-banner-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0;
}
.kx-prod-banner-phone {
  position: absolute;
  right: 40px;
  top: 50%;
  transform: translateY(-50%);
  text-align: right;
  z-index: 1;
}
.kx-prod-banner-phone-label {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
}
.kx-prod-banner-phone-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--kx-red);
  letter-spacing: 1px;
}
/* Product cards */
.kx-prod-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.kx-prod-card {
  background: #fff;
  border-radius: 8px;
  padding: 28px 22px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  transition: transform 0.3s, box-shadow 0.3s;
  display: flex;
  flex-direction: column;
}
.kx-prod-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}
.kx-prod-card-icon {
  width: 52px;
  height: 52px;
  background: rgba(215,25,32,0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--kx-red);
  font-size: 22px;
  margin-bottom: 16px;
}
.kx-prod-card-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--kx-text);
  margin-bottom: 8px;
}
.kx-prod-card-desc {
  font-size: 13px;
  color: var(--kx-text-sub);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}
.kx-prod-card-link {
  font-size: 13px;
  color: var(--kx-red);
  text-decoration: none;
  font-weight: 500;
  transition: gap 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.kx-prod-card-link:hover {
  gap: 8px;
  color: var(--kx-red-hover);
}

/* === 5. Brand Strength === */
.kx-brand {
  padding: 90px 0;
  background: linear-gradient(135deg, var(--kx-dark) 0%, #1a2540 100%);
  position: relative;
  overflow: hidden;
}
.kx-brand::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.015'%3E%3Cpath d='M0 0h40v40H0z'/%3E%3Cpath d='M0 20h40M20 0v40' stroke='%23fff' stroke-opacity='0.03' stroke-width='1'/%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}
.kx-brand .kx-container { position: relative; z-index: 1; }
/* Tabs */
.kx-brand-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  justify-content: center;
  flex-wrap: wrap;
}
.kx-brand-tab {
  padding: 10px 28px;
  border-radius: 4px;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.25s;
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.65);
  border: 1px solid rgba(255,255,255,0.08);
  text-decoration: none;
}
.kx-brand-tab:hover {
  background: rgba(215,25,32,0.12);
  color: #fff;
  border-color: rgba(215,25,32,0.3);
}
.kx-brand-tab.active {
  background: var(--kx-red);
  color: #fff;
  border-color: var(--kx-red);
}
/* Content */
.kx-brand-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.kx-brand-img {
  border-radius: 8px;
  overflow: hidden;
  height: 340px;
  background: linear-gradient(135deg, #1a2744 0%, #243352 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.06);
}
.kx-brand-img-placeholder {
  color: rgba(255,255,255,0.2);
  font-size: 14px;
  text-align: center;
  padding: 20px;
}
.kx-brand-info h3 {
  font-size: 15px;
  color: var(--kx-red);
  margin-bottom: 20px;
  font-weight: 500;
  letter-spacing: 1px;
}
.kx-brand-info p {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  line-height: 2;
  margin-bottom: 30px;
}
.kx-brand-contact {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.kx-brand-phone {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
}
.kx-brand-phone-label {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  display: block;
  margin-bottom: 4px;
}

/* === 6. Service Cases === */
.kx-cases {
  padding: 90px 0;
  background: var(--kx-white);
}
.kx-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.kx-case-card {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.07);
  transition: transform 0.3s, box-shadow 0.3s;
}
.kx-case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}
.kx-case-card-img {
  height: 200px;
  background: linear-gradient(135deg, #e8ecf4 0%, #dde3ee 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.kx-case-card-img-placeholder {
  color: #b0b8c8;
  font-size: 40px;
}
.kx-case-card-body {
  padding: 24px;
}
.kx-case-card-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--kx-text);
  margin-bottom: 10px;
  line-height: 1.5;
}
.kx-case-card-desc {
  font-size: 14px;
  color: var(--kx-text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
}
.kx-case-card-link {
  font-size: 13px;
  color: var(--kx-red);
  text-decoration: none;
  font-weight: 500;
}
.kx-case-card-link:hover {
  color: var(--kx-red-hover);
}
.kx-cases-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 36px;
}
.kx-cases-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ddd;
  cursor: pointer;
}
.kx-cases-dot.active {
  background: var(--kx-red);
  width: 28px;
  border-radius: 5px;
}

/* === 7. About Us === */
.kx-about {
  padding: 90px 0;
  background: linear-gradient(135deg, var(--kx-dark2) 0%, var(--kx-dark3) 100%);
}
.kx-about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}
.kx-about-img {
  border-radius: 8px;
  height: 380px;
  background: linear-gradient(135deg, #1a2744 0%, #243352 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
}
.kx-about-img-placeholder {
  color: rgba(255,255,255,0.2);
  font-size: 14px;
  text-align: center;
  padding: 20px;
}
.kx-about-info h2 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.kx-about-info p {
  font-size: 15px;
  color: rgba(255,255,255,0.72);
  line-height: 2;
  margin-bottom: 36px;
}
.kx-about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.kx-about-stat {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 20px 16px;
  text-align: center;
}
.kx-about-stat-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--kx-red);
  line-height: 1;
  margin-bottom: 8px;
}
.kx-about-stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}

/* === 8. News === */
.kx-news {
  padding: 90px 0;
  background: var(--kx-gray-bg);
}
.kx-news-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}
.kx-news-header h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--kx-text);
}
.kx-news-more {
  font-size: 14px;
  color: var(--kx-red);
  text-decoration: none;
  font-weight: 500;
}
.kx-news-more:hover { color: var(--kx-red-hover); }
.kx-news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.kx-news-card {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  transition: transform 0.3s, box-shadow 0.3s;
}
.kx-news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}
.kx-news-card-img {
  height: 170px;
  background: linear-gradient(135deg, #e8ecf4 0%, #dde3ee 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.kx-news-card-img-placeholder {
  color: #b0b8c8;
  font-size: 36px;
}
.kx-news-card-body {
  padding: 22px;
}
.kx-news-card-date {
  font-size: 12px;
  color: var(--kx-text-light);
  margin-bottom: 8px;
}
.kx-news-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--kx-text);
  margin-bottom: 10px;
  line-height: 1.5;
}
.kx-news-card-desc {
  font-size: 13px;
  color: var(--kx-text-sub);
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* === 9. Footer === */
.kx-footer {
  background: linear-gradient(to right, #1E293B 0%, #0F172A 100%);
  padding: 60px 0 0;
}
.kx-footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.kx-footer-brand .kx-logo { margin-bottom: 16px; }
.kx-footer-brand p {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  line-height: 1.9;
}
.kx-footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.kx-footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.kx-footer-col ul li {
  margin-bottom: 10px;
}
.kx-footer-col ul li a {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color 0.2s;
}
.kx-footer-col ul li a:hover {
  color: var(--kx-red);
}
.kx-footer-contact p {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 8px;
  line-height: 1.6;
}
.kx-footer-qr {
  text-align: center;
}
.kx-footer-qr-box {
  width: 110px;
  height: 110px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 10px;
  color: rgba(255,255,255,0.2);
  font-size: 12px;
}
.kx-footer-qr p {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
}
.kx-footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  line-height: 2;
}
.kx-footer-bottom a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  margin: 0 8px;
}
.kx-footer-bottom a:hover { color: var(--kx-red); }

/* === 响应式 === */
/* Tablet */
@media (max-width: 1024px) {
  .kx-nav-item a { padding: 0 12px; font-size: 14px; }
  .kx-hero-title { font-size: 36px; }
  .kx-hero-visual { display: none; }
  .kx-adv-bar .kx-container { grid-template-columns: repeat(2, 1fr); }
  .kx-adv-grid { grid-template-columns: repeat(2, 1fr); }
  .kx-products-layout { grid-template-columns: 1fr; }
  .kx-prod-sidebar { display: flex; overflow-x: auto; padding: 16px; gap: 0; }
  .kx-prod-sidebar-title { display: none; }
  .kx-prod-cat { white-space: nowrap; border-left: none; border-bottom: 3px solid transparent; padding: 10px 16px; }
  .kx-prod-cat.active { border-left: none; border-bottom-color: var(--kx-red); }
  .kx-prod-cat:hover { border-left: none; border-bottom-color: var(--kx-red); }
  .kx-prod-grid { grid-template-columns: repeat(2, 1fr); }
  .kx-brand-content { grid-template-columns: 1fr; }
  .kx-cases-grid { grid-template-columns: repeat(2, 1fr); }
  .kx-about-layout { grid-template-columns: 1fr; }
  .kx-about-img { height: 260px; }
  .kx-footer-main { grid-template-columns: 1fr 1fr; }
}
/* Mobile */
@media (max-width: 768px) {
  :root { --kx-nav-h: 60px; }
  .kx-nav { display: none; }
  .kx-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--kx-nav-h);
    left: 0;
    right: 0;
    background: var(--kx-dark2);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    padding: 16px 0;
    gap: 0;
  }
  .kx-nav.open .kx-nav-item a {
    line-height: 44px;
    padding: 0 24px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
  .kx-nav-item.active::after { display: none; }
  .kx-mobile-toggle { display: block; }
  .kx-header-cta { padding: 6px 16px; font-size: 13px; }
  .kx-hero { height: auto; min-height: 420px; padding: 50px 0; }
  .kx-hero-title { font-size: 28px; }
  .kx-hero-desc { font-size: 14px; }
  .kx-adv-bar .kx-container { grid-template-columns: 1fr 1fr; }
  .kx-adv-item { padding: 18px 12px; }
  .kx-adv-grid { grid-template-columns: 1fr; }
  .kx-section-title { font-size: 24px; }
  .kx-products { padding: 60px 0; }
  .kx-prod-grid { grid-template-columns: 1fr; }
  .kx-prod-banner-phone { position: static; transform: none; text-align: left; margin-top: 16px; }
  .kx-brand { padding: 60px 0; }
  .kx-brand-tabs { gap: 6px; }
  .kx-brand-tab { padding: 8px 16px; font-size: 13px; }
  .kx-cases { padding: 60px 0; }
  .kx-cases-grid { grid-template-columns: 1fr; }
  .kx-about { padding: 60px 0; }
  .kx-about-stats { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .kx-about-stat-num { font-size: 24px; }
  .kx-news { padding: 60px 0; }
  .kx-news-grid { grid-template-columns: 1fr; }
  .kx-footer-main { grid-template-columns: 1fr; gap: 28px; }
  .kx-advantages { padding: 60px 0; }
}
@media (max-width: 480px) {
  .kx-hero-btns { flex-direction: column; }
  .kx-hero-btns a { text-align: center; }
  .kx-about-stats { grid-template-columns: 1fr; }
  .kx-adv-bar .kx-container { grid-template-columns: 1fr; }
}