:root {
    --primary-color: #2563EB;
    --primary-dark: #1d4ed8;
    --primary-darker: #1e40af;
    --primary-light: #3b82f6;
    --primary-lighter: #60a5fa;
    --secondary-color: #111827;
    --accent-color: #FF4500;
    --accent-light: #efb344;
    --accent-teal: #06b6d4;
    --accent-teal-light: #22d3ee;
    --accent-red: #FF4500;
    --accent-red-light: #FF4500;
    --accent-red-lighter: #f87171;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #374151;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-surface: #f3f4f6;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-title-cn: '阿里巴巴普惠体3.0-75 SemiBold',sans-serif;
    --font-family-text-cn: '思源黑体 CN-Regular' , sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 88px;
}

.logo a {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-item {
    position: relative;
}

.nav-item > a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-item > a:hover {
    color: var(--primary-color);
}

.nav-item.has-mega > .nav-link {
    position: relative;
}

.nav-item.has-mega > .nav-link::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid currentColor;
    margin-left: 6px;
    transition: transform 0.3s ease;
}

.nav-item.has-mega:hover > .nav-link::after {
    transform: rotate(180deg);
}

.mega-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 999;
    border-top: 3px solid var(--primary-color);
}

.nav-item.has-mega:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mega-menu-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 40px;
}

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

.mega-menu-item {
    display: flex;
    flex-direction: column;
    padding: 24px;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.mega-menu-item:hover {
    background: var(--bg-light);
    border-color: var(--border-color);
    transform: translateY(-4px);
}

.mega-menu-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    margin-bottom: 16px;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.mega-menu-item:hover .mega-menu-icon {
    transform: scale(1.05);
}

.mega-menu-icon svg {
    width: 32px;
    height: 32px;
    stroke: white;
}

.mega-menu-item:nth-child(1) .mega-menu-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
}

.mega-menu-item:nth-child(2) .mega-menu-icon {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

.mega-menu-item:nth-child(3) .mega-menu-icon {
    background: linear-gradient(135deg, var(--accent-red), var(--accent-red-light));
}

.mega-menu-item:nth-child(4) .mega-menu-icon {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-lighter));
}

.mega-menu-content h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.mega-menu-item:hover .mega-menu-content h4 {
    color: var(--accent-red);
}

.mega-menu-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-search {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-secondary);
}

.btn-search:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    background: var(--primary-color);
    color: white;
    font-size: 14px;
    font-weight: 500;
    border-radius: 4px;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* 顶部导航"英文网站"按钮：使用品牌深蓝 #34377e */
#langSwitch.btn-primary {
    background: #34377e;
}

#langSwitch.btn-primary:hover {
    background: #2a2d68;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    background: transparent;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    overflow: hidden;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 120px 180px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.hero-slide.active {
    opacity: 1;
    visibility: visible;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-darker) 50%, var(--primary-dark) 100%);
    z-index: -1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse at top right, rgba(220, 38, 38, 0.12) 0%, transparent 60%);
    pointer-events: none;
}

.hero-bg-aerospace {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-darker) 50%, var(--primary-color) 100%);
}

.hero-bg-aerospace::after {
    background: radial-gradient(ellipse at top right, rgba(37, 99, 235, 0.15) 0%, transparent 60%);
}

.hero-bg-building {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-dark) 50%, var(--primary-light) 100%);
}

.hero-bg-building::after {
    background: radial-gradient(ellipse at top right, rgba(220, 38, 38, 0.12) 0%, transparent 60%);
}

.hero-bg-manufacturing {
    background: linear-gradient(135deg, var(--primary-darker) 0%, var(--primary-color) 50%, var(--primary-light) 100%);
}

.hero-bg-manufacturing::after {
    background: radial-gradient(ellipse at top right, rgba(220, 38, 38, 0.1) 0%, transparent 60%);
}

.hero-bg-energy {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-dark) 50%, var(--primary-color) 100%);
}

.hero-bg-energy::after {
    background: radial-gradient(ellipse at top right, rgba(220, 38, 38, 0.15) 0%, transparent 60%);
}

.hero-bg-tech,
.hero-bg-aerospace,
.hero-bg-building,
.hero-bg-manufacturing,
.hero-bg-energy {
    background-color: var(--primary-darker);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-bg-tech {
    background-image: url("images/Image-Index-Carousel-01.jpg");
}

.hero-bg-aerospace {
    background-image: url("images/Image-Index-Carousel-02.jpg");
}

.hero-bg-building {
    background-image: url("images/Image-Index-Carousel-03.jpg");
}

.hero-bg-manufacturing {
    background-image: url("images/Image-Index-Carousel-04.jpg");
}

.hero-bg-energy {
    background-image: url("images/Image-Index-Carousel-05.jpg");
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 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='0.03'%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");
}

.hero-gradient {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to top, rgba(255, 255, 255, 0.1), transparent);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: white;
}

.hero-title {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    line-height: 1.7;
    opacity: 0.9;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 36px;
    background: var(--accent-red);
    color: white;
    font-size: 16px;
    font-weight: 600;
    border-radius: 6px;
    transition: var(--transition);
    box-shadow: 0 4px 14px rgba(220, 38, 38, 0.35);
}

.btn-hero-primary:hover {
    background: var(--accent-red-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.45);
}

.btn-hero-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 36px;
    background: transparent;
    color: white;
    font-size: 16px;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 6px;
    transition: var(--transition);
}

.btn-hero-secondary:hover {
    border-color: white;
    background: rgba(255, 255, 255, 0.1);
}

.hero-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 100;
}

.hero-nav:hover {
    background: var(--accent-red);
    border-color: var(--accent-red);
    transform: translateY(-50%) scale(1.1);
}

.hero-nav svg {
    width: 28px;
    height: 28px;
}

.hero-prev {
    left: 40px;
}

.hero-next {
    right: 40px;
}

.hero-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 100;
}

.hero-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.hero-indicator:hover {
    background: rgba(255, 255, 255, 0.6);
}

.hero-indicator.active {
    width: 40px;
    border-radius: 6px;
    background: var(--accent-red);
}

.hero-bottom-mask {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 50;
}

.hero-stats {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    padding: 32px 48px;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 50;
}

.stat-item {
    text-align: center;
    color: white;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--accent-red-light);
}

.stat-label {
    font-size: 14px;
    opacity: 0.8;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(24px, 3vw, 40px);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    position: relative;
    display: inline-block;
    font-family: var(--font-family-title-cn);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-red);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-family: "思源黑体 CN-Regular";
}

.solutions {
    padding: 100px 0 60px;
    background: var(--bg-light);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.solution-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 36px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.solution-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-red);
}

/* === 新增：仅作用于「更多需求」卡片（solution-card-custom）=== */
.solution-card-custom {
    display: flex;
    flex-direction: column;
    text-align: center;      /* 图标/标题/描述 全部居中 */
}
.sc-btn-wrap {
    margin-top: auto;           /* 推到卡片底部 */
    text-align: center;         /* 水平居中 */
    padding-top: 16px;          /* 与上方描述的间距 */
}
/* 按钮默认态：蓝色（与图标背景同色）+ 蓝色光晕 */
.solution-card .solution-card-btn {
    background: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
}
/* 按钮 hover/active：红色（原 btn-cta-primary 默认色）+ 红色光晕 */
.solution-card .solution-card-btn:hover {
    background: var(--accent-red);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.45);
}

.solution-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    border-radius: 12px;
    margin: 0 auto 24px;
    transition: var(--transition);
}

.solution-card:hover .solution-icon {
    background: var(--accent-red);
}

.solution-icon svg {
    width: 32px;
    height: 32px;
    stroke: white;
}

/* 应用领域卡片示意图背景：品牌深蓝 #34377e */
.solution-icon {
    background: #34377e;
}

.solution-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    text-align: center;
}

.solution-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.solution-link {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.solution-link:hover {
    gap: 10px;
    color: var(--accent-red);
}

.industries {
    padding: 100px 0;
    background: var(--bg-white);
}

.industries-tabs {
    background: var(--bg-surface);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.tab-nav {
    display: flex;
    background: var(--secondary-color);
    padding: 0;
}

.tab-btn {
    flex: 1;
    padding: 18px 24px;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    font-family: var(--font-family);
}

.tab-btn:hover {
    color: white;
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: white;
    background: var(--accent-red);
}

.tab-content {
    padding: 48px;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.tab-image {
    border-radius: 12px;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.1' fill-rule='evenodd'/%3E%3C/svg%3E");
}

.image-placeholder.aviation {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
}

.image-placeholder.healthcare {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.image-placeholder.retail {
    background: linear-gradient(135deg, #fc4a1a 0%, #f7b733 100%);
}

.image-placeholder.oil {
    background: linear-gradient(135deg, #2c3e50 0%, #4ca1af 100%);
}

.image-placeholder.about {
    background: linear-gradient(135deg, #4776E6 0%, #8E54E9 100%);
    height: 400px;
}

.image-placeholder.news-1 {
    background: linear-gradient(135deg, #0066cc 0%, #00c2ff 100%);
}

.image-placeholder.news-2 {
    background: linear-gradient(135deg, #0a2540 0%, #0066cc 50%, #3399ff 100%);
}

.image-placeholder.news-3 {
    background: linear-gradient(135deg, #1a365d 0%, #2563eb 100%);
}

.tab-info h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.tab-info p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.feature-list {
    margin-bottom: 32px;
}

.feature-list li {
    padding: 8px 0;
    padding-left: 28px;
    position: relative;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--accent-red);
    border-radius: 50%;
}

.about {
    padding: 40px 0 100px;
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
    text-align: justify;
  	overflow-wrap: break-word;
}

.about-values {
    margin-top: 32px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 28px;
}

.value-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.value-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    border-radius: 10px;
    flex-shrink: 0;
}

.value-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

/* 关于芯绒科技示意图背景：品牌深蓝 #34377e */
.about .value-icon {
    background: #34377e;
}

.value-text h4 {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.value-text p {
    font-size: 14px;
    color: var(--text-secondary);
}

.about-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    width: 100% !important;
    height: 400px !important;          /* 刚性高度：与旧占位图 .image-placeholder.about 保持一致 */
    max-height: 400px !important;
    min-height: 400px !important;
    background: #000 !important;       /* 视频加载前/未铺满时的兜底颜色 */
    position: relative !important;
    display: block !important;
    padding: 0 !important;
    margin: 0 !important;
    box-sizing: border-box;
}

.about-video {
    width: 100% !important;
    height: 400px !important;
    max-height: 400px !important;
    min-height: 400px !important;
    display: block !important;
    object-fit: cover !important;      /* 按 400px×宽度 等比铺满，无黑边不扭曲 */
    background: #000 !important;
    border: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
}

.about-intro-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    display: flex;
}

.about-intro-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    flex-shrink: 0;
}

.news {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.news-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-red);
}

.news-card.featured {
    grid-column: span 1;
}

.news-image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-content {
    padding: 24px;
}

.news-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-surface);
    color: var(--accent-red);
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 12px;
}

.news-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.4;
    transition: var(--transition);
    text-align: justify;
  	overflow-wrap: break-word;
}

.news-card:hover .news-title {
    color: var(--accent-red);
}

.news-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-align: justify;
  	overflow-wrap: break-word;
}

.news-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.news-date {
    font-size: 13px;
    color: var(--text-light);
}

.news-link {
    font-size: 13px;
    font-weight: 500;
    color: var(--primary-color);
}

.news-more {
    text-align: center;
    margin-top: 48px;
}

/* 与 job_list.asp 的 .job-hero 完全一致的轮播规格（宽、高、padding、overlay、字体、响应式） */
.cta {
    padding: 88px 0 0 0;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
    background: #0a2540;
}

.cta-slides {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.cta-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center center;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
}

.cta-slide.active {
    opacity: 1;
}

.cta-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.50) 0%, rgba(30, 41, 59, 0.50) 50%, rgba(30, 58, 138, 0.50) 100%);
    z-index: 1;
}

.cta > .container {
    position: relative;
    z-index: 2;
    padding: 80px 24px;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.cta-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.cta-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    cursor: pointer;
    transition: background 0.25s, transform 0.25s;
}

.cta-dot:hover {
    background: rgba(255, 255, 255, 0.7);
}

.cta-dot.active {
    background: #fff;
    transform: scale(1.2);
}

.cta-title {
    font-size: clamp(28px, 3vw, 40px);
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -1.5px;
    color: white;
    position: relative;
    z-index: 2;
}

.cta-desc {
    font-size: 18px;
    opacity: 0.9;
    color: white;
    margin-bottom: 0;
    position: relative;
    z-index: 2;
}

/* ---------------- 首页独立 CTA（文字型，深蓝科技渐变） ---------------- */
.cta-index {
    position: relative;
    padding: 0 !important;
    min-height: 0 !important;
    height: 280px !important;
    overflow: hidden;
    isolation: isolate;
    /* 深蓝多层渐变：左上太空黑 → 中部军工蓝 → 右下科技青 */
    background:
        radial-gradient(1200px 600px at 85% 110%, rgba(56,189,248,0.22) 0%, rgba(56,189,248,0) 55%),
        radial-gradient(900px 500px at 10% -20%, rgba(59,130,246,0.35) 0%, rgba(59,130,246,0) 55%),
        linear-gradient(135deg, #060e24 0%, #0a2540 35%, #0e3a73 70%, #0e4a8e 100%);
}

/* 科技细网格蒙版（低对比，增强"高技术"感） */
.cta-index::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(148, 163, 184, 0.10) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.10) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: linear-gradient(180deg, rgba(0,0,0,0.0) 0%, rgba(0,0,0,0.9) 45%, rgba(0,0,0,0.9) 55%, rgba(0,0,0,0.0) 100%);
    -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.0) 0%, rgba(0,0,0,0.9) 45%, rgba(0,0,0,0.9) 55%, rgba(0,0,0,0.0) 100%);
    opacity: 0.75;
    z-index: 0;
    pointer-events: none;
}

/* 右上 / 左下两个柔光光晕（蓝+青，替代之前带红的搭配，统一科技冷色） */
.cta-index::after {
    content: '';
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(96,165,250,0.55) 0%, rgba(96,165,250,0.15) 40%, rgba(96,165,250,0) 70%);
    top: -180px;
    right: -60px;
    filter: blur(10px);
    opacity: 0.85;
    z-index: 0;
    pointer-events: none;
}

/* 额外光晕层：左下青蓝色（用 span.cta-index-glow，不与 ::after 冲突，避免伪元素只有两个时不够） */
.cta-index .cta-index-glow {
    position: absolute;
    width: 520px;
    height: 520px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(34,211,238,0.45) 0%, rgba(34,211,238,0.10) 42%, rgba(34,211,238,0) 72%);
    bottom: -240px;
    left: -140px;
    filter: blur(10px);
    opacity: 0.85;
    z-index: 0;
    pointer-events: none;
}

.cta-index > .container {
    padding: 40px 24px !important;
}

.cta-index .cta-title {
    font-size: clamp(22px, 2.4vw, 32px) !important;
    letter-spacing: -1px !important;
    margin-bottom: 8px !important;
    color: #f8fafc;
    text-shadow: 0 2px 24px rgba(56,189,248,0.18);
}

.cta-index .cta-title:last-of-type {
    margin-bottom: 0 !important;
    background: linear-gradient(90deg, #bfdbfe 0%, #7dd3fc 55%, #38bdf8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* ≤480px 窄屏：继续缩小 cta-index 高度 */
@media (max-width: 480px) {
    .cta-index {
        height: 220px !important;
    }

    .cta-index > .container {
        padding: 24px 24px !important;
    }

    .cta-index::before {
        background-size: 28px 28px;
        opacity: 0.55;
    }

    .cta-index::after {
        width: 260px;
        height: 260px;
        top: -120px;
        right: -80px;
        opacity: 0.7;
    }

    .cta-index .cta-index-glow {
        width: 320px;
        height: 320px;
        bottom: -160px;
        left: -120px;
        opacity: 0.7;
    }
}

.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-cta-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 36px;
    background: var(--accent-red);
    color: white;
    font-size: 16px;
    font-weight: 600;
    border-radius: 6px;
    transition: var(--transition);
    box-shadow: 0 4px 14px rgba(220, 38, 38, 0.35);
}

.btn-cta-primary:hover {
    background: var(--accent-red-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.45);
}

/* 应用领域第6张卡片"提交需求"按钮：默认背景改为品牌深蓝 #34377e，悬停色保持不变 */
.solution-card-custom .btn-cta-primary {
    background: #34377e;
    box-shadow: 0 4px 14px rgba(52, 55, 126, 0.35);
}

.btn-cta-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 36px;
    background: transparent;
    color: white;
    font-size: 16px;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 6px;
    transition: var(--transition);
}

.btn-cta-secondary:hover {
    border-color: white;
    background: rgba(255, 255, 255, 0.1);
}

.contact {
    padding: 100px 0;
    background: var(--bg-light);
}

.contact-header {
    text-align: center;
    margin-bottom: 60px;
}

.contact-header .section-title {
    margin-bottom: 16px;
}

.contact-desc {
    font-size: 16px;
    color: var(--text-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.contact-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 16px;
    margin: 0 auto 24px;
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

.contact-icon svg {
    width: 28px;
    height: 28px;
    stroke: white;
}

.contact-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.contact-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    font-family: var(--font-family);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-red);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.btn-submit {
    padding: 16px 32px;
    background: var(--accent-red);
    color: white;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-family);
    box-shadow: 0 4px 14px rgba(220, 38, 38, 0.3);
}

.btn-submit:hover {
    background: var(--accent-red-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
}

.footer {
    background: var(--secondary-color);
    color: white;
    padding-top: 80px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-red-light);
    margin-bottom: 20px;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 24px;
    text-align: justify;
  	overflow-wrap: break-word;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-link:hover {
    background: var(--accent-red);
    border-color: var(--accent-red);
    transform: translateY(-3px);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

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

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
    font-family: var(--font-family-text-cn);
}

.footer-column a:hover {
    color: var(--accent-red-light);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    flex-wrap: wrap;
    gap: 16px;
    font-family: var(--font-family-text-cn);
}

.footer-copyright p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-legal a:hover {
    color: var(--accent-red-light);
}

@media (max-width: 1024px) {
    .header-container {
        padding: 0 24px;
    }

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

    .nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mega-menu {
        position: static;
        transform: none;
        box-shadow: none;
        border-top: none;
        border-bottom: 1px solid var(--border-color);
    }

    .mega-menu-container {
        padding: 20px;
    }

    .mega-menu-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .mega-menu-item {
        padding: 16px;
    }

    .mega-menu-icon {
        width: 48px;
        height: 48px;
    }

    .mega-menu-icon svg {
        width: 24px;
        height: 24px;
    }

    .hero {
        min-height: auto;
        height: auto;
    }

    .hero-slider {
        position: relative;
        height: 100vh;
        min-height: 600px;
    }

    .hero-slide {
        padding: 100px 24px 200px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .hero-nav {
        width: 48px;
        height: 48px;
    }

    .hero-nav svg {
        width: 22px;
        height: 22px;
    }

    .hero-prev {
        left: 16px;
    }

    .hero-next {
        right: 16px;
    }

    .hero-indicators {
        bottom: 26px;
    }

    .hero-bottom-mask {
        height: 64px;
    }

    .hero-stats {
        position: absolute;
        flex-wrap: wrap;
        gap: 20px;
        padding: 20px 24px;
    }

    .stat-item {
        flex: 1 1 calc(50% - 10px);
    }

    .stat-number {
        font-size: 28px;
    }

    .stat-label {
        font-size: 12px;
    }

    .tab-panel.active {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        order: -1;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

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

    .footer-main {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .cta-title {
        font-size: 36px;
    }

    .cta-desc {
        font-size: 16px;
    }

    .hero {
        padding: 100px 24px 140px;
    }

    .solutions-grid {
        grid-template-columns: 1fr;
    }

    .hero-bottom-mask {
        height: 58px;
    }

    .hero-indicators {
        bottom: 23px;
        gap: 10px;
    }

    .hero-stats {
        position: relative;
        bottom: auto;
        left: auto;
        transform: none;
        margin-top: 40px;
        width: 100%;
    }

    .tab-nav {
        flex-wrap: wrap;
    }

    .tab-btn {
        flex: 1 1 50%;
    }

    .tab-content {
        padding: 24px;
    }

    .cta-actions {
        flex-direction: column;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .btn-cta-primary,
    .btn-cta-secondary {
        width: 100%;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-legal {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .cta {
        padding: 60px 0;
    }

    .cta-title {
        font-size: 28px;
    }

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

    .btn-hero-primary,
    .btn-hero-secondary {
        width: 100%;
    }

    .stat-item {
        flex: 1 1 100%;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in {
    animation: slideIn 0.5s ease forwards;
}

/* 9) 英文版页脚：Applications / About XRI / Contact Us 三列加宽（英文链接文字长） */
html:lang(en) .footer-main {
    grid-template-columns: 1.6fr 2.3fr;   /* 左侧品牌区比默认1.5fr/2fr更宽，链接区仅微增 */
}
html:lang(en) .footer-links {
    grid-template-columns: 0.55fr 1.15fr 0.8fr 1fr;  /* About XRI 列收窄（链接最短），Applications/Contact Us 保持宽 */
    column-gap: 28px;
}

/* 移动端：EN 页脚三列布局同步恢复为默认的 2 列 / 1 列（宽屏才启用上述加宽比例） */
@media (max-width: 1024px) {
    html:lang(en) .footer-main {
        grid-template-columns: 1fr;
    }
    html:lang(en) .footer-links {
        grid-template-columns: repeat(2, 1fr);
        column-gap: 24px;
    }
}
@media (max-width: 480px) {
    html:lang(en) .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ========================================================================
   [方案A] 英文版专属样式（仅在 html lang="en" 页面生效，中文页零影响）
   Poppins 字体 / 西文友好行间距 / Hero & CTA 按钮长度适配
   ======================================================================== */

/* 1) 英文全局字体变量覆盖（Poppins Regular 为主体，字重同步300-700） */
html:lang(en) {
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-family-title-cn: 'Poppins', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-family-text-cn:  'Poppins', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* 2) 正文与基础元素：西文友好行高/字重/间距 */
html:lang(en) body {
    font-family: var(--font-family);
    font-weight: 400;                /* Poppins Regular */
    line-height: 1.6;               /* 比中文紧凑但易读，中文是1.8+ */
    letter-spacing: 0.05px;
    color: #1f2937;                 /* 英文正文偏黑易读 */
}

/* 段落与卡片描述：西文段落间距略小，避免空荡 */
html:lang(en) p,
html:lang(en) .section-desc,
html:lang(en) .news-desc,
html:lang(en) .solution-desc,
html:lang(en) .product-desc,
html:lang(en) .value-desc,
html:lang(en) .job-desc,
html:lang(en) .footer-desc {
    line-height: 1.65;
    margin-bottom: 14px;
}

/* 列表（新闻/产品 bullet）西文适合的行距 */
html:lang(en) li { line-height: 1.7; }

/* 3) 标题：Poppins 标题做 letter-spacing 负微调，观感专业 */
html:lang(en) h1, html:lang(en) h2, html:lang(en) h3,
html:lang(en) h4, html:lang(en) h5, html:lang(en) h6,
html:lang(en) .section-title, html:lang(en) .cta-title,
html:lang(en) .hero-title, html:lang(en) .hero-subtitle,
html:lang(en) .value-title, html:lang(en) .solution-title,
html:lang(en) .news-title,  html:lang(en) .product-title,
html:lang(en) .stat-number, html:lang(en) .stat-label,
html:lang(en) .footer-logo, html:lang(en) .office-name,
html:lang(en) .company-name, html:lang(en) .contact-title {
    font-family: var(--font-family);
    font-weight: 600;
    letter-spacing: -0.2px;
    line-height: 1.25;              /* 西文标题行高远比中文紧凑 */
}
html:lang(en) h1 { line-height: 1.15; }
html:lang(en) h2, html:lang(en) .section-title { line-height: 1.2;  }
html:lang(en) h3, html:lang(en) .solution-title { line-height: 1.3; }

/* Hero 区 CTA 文字 */
html:lang(en) .hero-title    { font-size: 46px; letter-spacing: -0.6px; }
html:lang(en) .hero-subtitle { font-size: 18px; font-weight: 400; letter-spacing: 0.4px; }

/* 4) 覆盖中文站的硬编码中文字体（防止 fallback 到中文黑体） */
html:lang(en) .section-title,
html:lang(en) .tab-btn,
html:lang(en) input, html:lang(en) textarea, html:lang(en) select,
html:lang(en) button, html:lang(en) a {
    font-family: var(--font-family) !important;
}
html:lang(en) .solution-title,
html:lang(en) .nav-link,
html:lang(en) .footer-column h4,
html:lang(en) .category-item {
    font-family: var(--font-family) !important;
}

/* 5) Hero / CTA 按钮长度适配：英文词比中文长 2~3 倍，加宽内边距 + 最小宽度 */
html:lang(en) .btn-primary,
html:lang(en) .btn-search,
html:lang(en) .page-btn {
    padding-left: 30px;             /* 24 → 30 */
    padding-right: 30px;
    min-width: auto;
    font-family: var(--font-family);
    font-weight: 500;
    letter-spacing: 0.1px;
}
html:lang(en) .btn-cta-primary,
html:lang(en) .btn-cta-secondary,
html:lang(en) .btn-hero-primary,
html:lang(en) .btn-hero-secondary {
    padding-left: 48px;             /* 原 36 → 48 */
    padding-right: 48px;            /* "Submit Requirements" 18 chars 不挤 */
    min-width: 200px;               /* 确保 CTA 大按钮在所有情况下都气派 */
    font-family: var(--font-family);
    font-weight: 600;
    letter-spacing: 0.2px;
    white-space: nowrap;            /* 防止英文词被强换行 */
}

/* 6) 卡片/表格/侧栏描述 padding：英文描述单词多，加一点内边距避免贴边 */
html:lang(en) .news-card,
html:lang(en) .solution-card,
html:lang(en) .product-card,
html:lang(en) .job-card,
html:lang(en) .value-card,
html:lang(en) .contact-card {
    padding: 26px 22px;
}

/* 7) 分页/标签/Tab 英文词的宽度补偿 */
html:lang(en) .tab-btn {
    padding: 16px 26px;
    font-weight: 500;
}
html:lang(en) .page-btn {
    min-width: 40px;
}

/* 8) 响应式：移动端 CTA 按钮保持 100% 宽度，同时英文词不换行被截断 */
@media (max-width: 768px) {
    html:lang(en) .btn-cta-primary,
    html:lang(en) .btn-cta-secondary,
    html:lang(en) .btn-hero-primary,
    html:lang(en) .btn-hero-secondary {
        width: 100%;
        padding-left: 24px;
        padding-right: 24px;
        min-width: 0;
        white-space: normal;
    }
    html:lang(en) .hero-title { font-size: 34px; letter-spacing: -0.4px; }
    html:lang(en) .section-title { font-size: 26px; }
}

/* 10) aboutEN CTA 大标语：比中文默认（clamp 24-40px）小 1 号 */
html:lang(en) .cta-content h2 {
    font-size: clamp(22px, 2.6vw, 36px);
}

/* 11) ProductListEN CTA（Data Sheet 区）：标题与说明各缩小 1 号 */
html:lang(en) .cta-section-sm .cta-content h2 {
    font-size: clamp(20px, 2.4vw, 34px);
}
html:lang(en) .cta-section-sm .cta-content p {
    font-size: 17px;
}

/* 12) ProductDetailEN 面包屑标签（Products / P15系列）：字号加大 1 号 */
html:lang(en) .pd-breadcrumb {
    font-size: 14px;
    padding: 10px 22px;
}
html:lang(en) .pd-breadcrumb a,
html:lang(en) .pd-crumb-current {
    font-size: 15px;
}