:root {
    
    
--primary: #0052D9;
--primary-light: #E8F0FE;
--primary-hover: #003bb5;
--text-main: #1a1a2e;
--text-secondary: #4a4a5a;
--text-muted: #888;
--bg-page: #f7f8fa;
--bg-card: #ffffff;
--border: #e5e7eb;
--radius: 16px;
--radius-sm: 10px;
--shadow: 0 4px 24px rgba(0,0,0,0.06);
--shadow-hover: 0 8px 40px rgba(0,82,217,0.12);

--transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  /* 主色调 */
  --color-primary:        #0052CC;
  --color-primary-dark:   #003E99;
  --color-primary-light:  #4C9AFF;
  --color-accent:         #00C6FF;
  --color-accent-dark:    #0099CC;

  /* 功能色 */
  --color-success:  #00875A;
  --color-warning:  #FF8B00;
  --color-danger:   #DE350B;
  --color-info:     #0065FF;

  /* 中性色 */
  --color-white:    #FFFFFF;
  --color-gray-50:  #F8F9FA;
  --color-gray-100: #F1F3F5;
  --color-gray-200: #E9ECEF;
  --color-gray-300: #DEE2E6;
  --color-gray-400: #CED4DA;
  --color-gray-500: #ADB5BD;
  --color-gray-600: #6C757D;
  --color-gray-700: #495057;
  --color-gray-800: #343A40;
  --color-gray-900: #212529;

  /* 文字色 */
  --color-text-primary:   #1A1D23;
  --color-text-secondary: #4A5568;
  --color-text-muted:     #718096;
  --color-text-inverse:   #FFFFFF;

  /* 背景色 */
  --color-bg-body:    #FFFFFF;
  --color-bg-section: #F8FAFF;
  --color-bg-card:    #FFFFFF;
  --color-bg-hover:   #F0F5FF;

  /* 边框 */
  --color-border:       #E2E8F0;
  --color-border-light: #EDF2F7;
  --color-border-focus: #0052CC;

  /* 渐变 */
  --gradient-primary: #0071ef;
  --gradient-hero-1:  linear-gradient(135deg, #003E99 0%, #0052CC 50%, #0065FF 100%);
  --gradient-hero-2:  linear-gradient(135deg, #0D1B2A 0%, #0052CC 60%, #00C6FF 100%);
  --gradient-hero-3:  linear-gradient(135deg, #1A0A00 0%, #C43B00 60%, #FF6B35 100%);

  /* 阴影 */
  --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm:  0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md:  0 4px 16px rgba(0, 0, 0, 0.10);
  --shadow-lg:  0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-xl:  0 16px 48px rgba(0, 0, 0, 0.15);
  --shadow-card: 0 2px 12px rgba(0, 82, 204, 0.08);
  --shadow-hover: 0 8px 32px rgba(0, 82, 204, 0.18);

  /* 圆角 */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Helvetica Neue', Arial, 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', Consolas, monospace;

  /* 字号 */
  --text-xs:   12px;
  --text-sm:   14px;
  --text-base: 16px;
  --text-lg:   18px;
  --text-xl:   20px;
  --text-2xl:  24px;
  --text-3xl:  30px;
  --text-4xl:  36px;
  --text-5xl:  48px;
  --text-6xl:  60px;

  /* 行高 */
  --leading-tight:  1.25;
  --leading-snug:   1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* 过渡 */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
  --transition-bounce: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* 布局 */
  --container-max: 1240px;
  --container-pad: 24px;
  --header-height: 72px;
  --top-bar-height: 36px;
  --section-pad-y:  80px;
  
  
  
    * { box-sizing: border-box; margin: 0; padding: 0; };
}

/* ===== 2. Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden; /* 禁止全局横向滚动 */
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-inverse);
  background-color: var(--color-bg-body);
  overflow-x: hidden; /* 移动端无横向滚动 */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video, svg {
  max-width: 100%;
  height: auto;

}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol { list-style: none; }

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* 焦点样式（无障碍） */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* 跳过链接（无障碍） */
.skip-link {
  position: absolute;
  top: -100%;
  left: 8px;
  padding: 8px 16px;
  background: var(--color-primary);
  color: white;
  z-index: 9999;
  border-radius: var(--radius-md);
  font-weight: 600;
}
.skip-link:focus { top: 8px; }

/* ===== 3. 工具类 ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section-pad { padding: var(--section-pad-y) 0; }
.bg-light { background-color: var(--color-bg-section); }

/* 视觉隐藏（屏幕阅读器可读） */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

/* ===== 4. 按钮系统 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 24px;
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.25;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(0, 82, 204, 0.3);
}
.btn-primary:hover, .btn-primary:focus {
  background: linear-gradient(135deg, #003E99 0%, #0099CC 100%);
  box-shadow: 0 6px 20px rgba(0, 82, 204, 0.45);
  transform: translateY(-1px);
  color: var(--color-white);
}
.btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }

.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.7);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.15);
  border-color: var(--color-white);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-sm  { padding: 7px 16px; font-size: var(--text-sm); }
.btn-lg  { padding: 14px 32px; font-size: var(--text-lg); }
.btn-block { width: 100%; }

/* ===== 5. 徽章 ===== */
.badge-hot {
  display: inline-block;
  padding: 2px 7px;
  background: linear-gradient(90deg, #FF6B35, #FF3B3B);
  color: white;
  font-size: 11px;
  font-weight: 700;
  border-radius: var(--radius-full);
  vertical-align: middle;
  letter-spacing: 0.5px;
}

/* ===== 6. Section 通用头部 ===== */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-12);
}

.section-label {
  display: inline-block;
  padding: 5px 16px;
  background: rgba(0, 82, 204, 0.08);
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl));
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.section-footer {
  text-align: center;
  margin-top: var(--space-12);
}

/* ===== 7. Logo ===== */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img {
    width: 169px;
    height: auto;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-name {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.logo-tagline {
  font-size: 11px;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
  margin-top: 2px;
}

/* ===== 8. 顶部公告条 ===== */
.top-bar {
  background: var(--gradient-primary);
  height: var(--top-bar-height);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.top-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.top-bar__text {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255,255,255,0.92);
  font-size: var(--text-sm);
  font-weight: 500;
}

.icon-inline {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.top-bar__right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.top-bar__link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: rgba(255,255,255,0.85);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}
.top-bar__link svg { width: 13px; height: 13px; }
.top-bar__link:hover { color: white; }

/* ===== 9. 主导航 ===== */
.site-header {
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  transition: box-shadow var(--transition-base);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.10);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-6);
}

.span-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text-primary);
  text-decoration: none;
  white-space: nowrap;
  border-radius: 999px;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.span-cta img {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  display: block;
  object-fit: contain;
}


/* 桌面导航 */
.main-nav { flex: 1; display: flex; justify-content: center; }

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: var(--color-bg-hover);
}

.nav-link .chevron {
  width: 10px;
  height: 6px;
  transition: transform var(--transition-base);
}

.has-dropdown { position: relative; }

.has-dropdown:hover .chevron {
  transform: rotate(180deg);
}

/* 下拉菜单 */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: all var(--transition-base);
  z-index: 100;
}

.has-dropdown:hover .dropdown-menu,
.has-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 9px 20px;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background: var(--color-bg-hover);
  color: var(--color-primary);
  padding-left: 24px;
}

.nav-cta { flex-shrink: 0; }

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 8px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  flex-shrink: 0;
}
.hamburger:hover { background: var(--color-gray-100); }
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* 汉堡动画 */
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端导航菜单 */
.mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow);
}

.mobile-nav.open {
  max-height: 900px;
}

.mobile-nav-list {
  padding: var(--space-4) var(--container-pad) var(--space-6);
}

.mobile-nav-link {
  display: block;
  padding: 12px 0;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border-light);
  transition: color var(--transition-fast);
}
.mobile-nav-link:hover { color: var(--color-primary); }

/* 移动端子导航容器 */
.mobile-nav-parent {
  border-bottom: 1px solid var(--color-border-light);
}

/* 子导航开关按钮 */
.mobile-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 12px 0;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-primary);
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  transition: color var(--transition-fast);
}

.mobile-nav-toggle:hover,
.mobile-nav-toggle[aria-expanded="true"] {
  color: var(--color-primary);
}

/* caret 箭头动画 */
.mobile-nav-caret {
  width: 10px;
  height: 6px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.mobile-nav-toggle[aria-expanded="true"] .mobile-nav-caret {
  transform: rotate(180deg);
}

/* 子导航列表 */
.mobile-subnav {
  list-style: none;
  padding: 0 0 8px 16px;
  margin: 0;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow), opacity .25s ease, padding .3s ease;
  opacity: 0;
}

.mobile-subnav.open {
  max-height: 320px;
  opacity: 1;
  padding-bottom: 12px;
}

/* 子导航链接 */
.mobile-subnav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 0;
  font-size: .9rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), padding var(--transition-fast);
}

.mobile-subnav-link:hover,
.mobile-subnav-link:focus-visible {
  color: var(--color-primary);
  padding-left: 6px;
}

.mobile-subnav-link .badge-hot {
  font-size: .6rem;
  padding: 1px 5px;
}

.mobile-nav-cta {
  margin-top: var(--space-5);
  border-bottom: none;
}
.mobile-nav-cta .btn { width: 100%; justify-content: center; }





/* ===== 19. 页脚 ===== */
.site-footer {
  background: var(--color-gray-900);
  color: rgba(255,255,255,0.85);
}

.footer-main { padding: var(--space-16) 0; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
  gap: var(--space-10);
  align-items: start;
}

.footer-logo .logo-name { color: var(--color-white); }
.footer-logo .logo-tagline { color: rgba(255,255,255,0.5); }

.footer-brand-desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  line-height: var(--leading-relaxed);
  margin: var(--space-5) 0;
}

.footer-tel {
  display: block;
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-white);
  transition: color var(--transition-fast);
}
.footer-tel:hover { color: var(--color-accent); }

.footer-tel-note {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
  display: block;
}

.footer-nav-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: var(--space-5);
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav-list a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  transition: color var(--transition-fast);
}
.footer-nav-list a:hover { color: var(--color-white); }

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.footer-contact-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
}

.footer-contact-list a {
  color: rgba(255,255,255,0.7);
  transition: color var(--transition-fast);
}
.footer-contact-list a:hover { color: var(--color-white); }

.footer-qr { margin-top: var(--space-5); }

.qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.qr-placeholder span {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
}



/* 移动端导航菜单 */
.mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow);
}

.mobile-nav.open {
  max-height: 900px;
}

.mobile-nav-list {
  padding: var(--space-4) var(--container-pad) var(--space-6);
}

.mobile-nav-link {
  display: block;
  padding: 12px 0;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border-light);
  transition: color var(--transition-fast);
}
.mobile-nav-link:hover { color: var(--color-primary); }

/* 移动端子导航容器 */
.mobile-nav-parent {
  border-bottom: 1px solid var(--color-border-light);
}

/* 子导航开关按钮 */
.mobile-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 12px 0;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-primary);
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  transition: color var(--transition-fast);
}

.mobile-nav-toggle:hover,
.mobile-nav-toggle[aria-expanded="true"] {
  color: var(--color-primary);
}

/* caret 箭头动画 */
.mobile-nav-caret {
  width: 10px;
  height: 6px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.mobile-nav-toggle[aria-expanded="true"] .mobile-nav-caret {
  transform: rotate(180deg);
}

/* 子导航列表 */
.mobile-subnav {
  list-style: none;
  padding: 0 0 8px 16px;
  margin: 0;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow), opacity .25s ease, padding .3s ease;
  opacity: 0;
}

.mobile-subnav.open {
  max-height: 320px;
  opacity: 1;
  padding-bottom: 12px;
}

/* 子导航链接 */
.mobile-subnav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 0;
  font-size: .9rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), padding var(--transition-fast);
}

.mobile-subnav-link:hover,
.mobile-subnav-link:focus-visible {
  color: var(--color-primary);
  padding-left: 6px;
}

.mobile-subnav-link .badge-hot {
  font-size: .6rem;
  padding: 1px 5px;
}

.mobile-nav-cta {
  margin-top: var(--space-5);
  border-bottom: none;
}
.mobile-nav-cta .btn { width: 100%; justify-content: center; }





/* 页脚底部 */
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: var(--space-5) 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer-copyright {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.4);
}

.footer-legal-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer-legal-link {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.4);
  transition: color var(--transition-fast);
}
.footer-legal-link:hover { color: rgba(255,255,255,0.8); }

.footer-icp {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
}




/* 平板 (600px - 767px) */
@media (max-width: 767px) {
  :root {
    --section-pad-y: 56px;
    --container-pad: 16px;
    --header-height: 60px;
    --top-bar-height: 32px;
  }

  /* 导航 */
  .main-nav,
  .nav-cta { display: none; }

  .hamburger { display: flex; }
  .mobile-nav { display: block; }

  .top-bar__right { display: none; }

  /* Hero */
  .carousel { height: clamp(420px, 70vw, 560px); }

  .slide-title { font-size: clamp(var(--text-2xl), 7vw, var(--text-4xl)); }
  .slide-desc  { font-size: var(--text-sm); }

  .slide-actions { gap: var(--space-3); }
  .slide-actions .btn-lg { padding: 12px 22px; font-size: var(--text-base); }

  .slide-stats {
    gap: var(--space-5);
    flex-wrap: wrap;
  }

  /* 数据带 */
  .trust-bar__inner { gap: 0; }
  .trust-item { padding: var(--space-3) var(--space-4); }
  .trust-divider { height: 30px; }
  .trust-num { font-size: var(--text-2xl); }

  /* 服务 */
  .services-grid { grid-template-columns: 1fr; gap: var(--space-5); }

  /* 优势 */
  .advantages-layout { grid-template-columns: 1fr; gap: var(--space-8); }
  .adv-visual-card { padding: var(--space-6); }

  /* 案例 */
  .cases-grid { grid-template-columns: 1fr; gap: var(--space-5); }

  /* 证言 */
  .testimonials-grid { grid-template-columns: 1fr; gap: var(--space-5); }

  /* 联系 */
  .contact-layout { grid-template-columns: 1fr; gap: var(--space-8); }
  .contact-form-wrap { padding: var(--space-6); }
  .form-row { grid-template-columns: 1fr; }

  /* 页脚 */
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .footer-bottom-inner { flex-direction: column; align-items: flex-start; gap: var(--space-2); }

  /* 回到顶部 */
  .back-to-top { bottom: 16px; right: 16px; width: 40px; height: 40px; }

  /* Section title */
  .section-title { font-size: var(--text-2xl); }
  .section-desc  { font-size: var(--text-base); }
}