:root {
    --blue: #005A9C;
    --blue-dark: #003d6b;
    --blue-light: #0070c0;
    --green: #009640;
    --green-light: #00b34a;
    --red: #E32619;
    --red-hover: #c41e12;
    --dark: #1a2332;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-400: #94a3b8;
    --gray-600: #475569;
    --gray-800: #1e293b;
    --white: #ffffff;
    --shadow: 0 4px 24px rgba(0, 90, 156, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 90, 156, 0.12);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--gray-800);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}

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

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

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

/* ===== 顶部信息栏 ===== */
.top-bar {
    background: var(--blue-dark);
    color: rgba(255,255,255,0.85);
    font-size: 1rem;
    padding: 8px 0;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.top-bar a { color: rgba(255,255,255,0.85); }
.top-bar a:hover { color: var(--white); }
.top-bar i { color: var(--green-light); margin-right: 6px; font-size: 1rem; }

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 14px;
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
}

.lang-switch:hover { border-color: var(--green-light); color: var(--white); }

.social-mini a {
    margin-left: 10px;
    font-size: 0.9rem;
    opacity: 0.7;
}

.social-mini a:hover { opacity: 1; color: var(--white); }

/* ===== 导航栏 ===== */
/* 默认：透明背景，浮动在 banner 上 */
.navbar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    box-shadow: none;
    transition: background 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
}

/* 滚动后：固定顶部 + 实色背景 */
.navbar.navbar-scrolled {
    position: fixed;
    top: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100px;
    transition: height 0.3s ease;
}

.navbar.navbar-scrolled .container {
    height: 80px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-link img {
    height: 66px;
    width: auto;
    transition: height 0.3s ease;
}

.navbar.navbar-scrolled .logo-link img {
    height: 52px;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.3;
    color: #fff;
    transition: color 0.3s ease;
}

.logo-text small {
    display: block;
    font-size: 0.97rem;
    font-weight: 400;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.9);
    transition: color 0.3s ease;
}

/* 滚动后：深色文字 */
.navbar.navbar-scrolled .logo-text {
    color: var(--blue);
}

.navbar.navbar-scrolled .logo-text small {
    color: var(--gray-400);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 1.2rem;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    color: #fff;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--green);
    transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: #fff;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.navbar.navbar-scrolled .nav-links a {
    color: var(--gray-800);
}

.navbar.navbar-scrolled .nav-links a:hover,
.navbar.navbar-scrolled .nav-links a.active {
    color: var(--blue);
}

.nav-cta {
    background: var(--red);
    color: var(--white) !important;
    padding: 10px 24px !important;
    border-radius: 6px;
    font-weight: 600 !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--red-hover);
    color: var(--white) !important;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #fff;
    cursor: pointer;
    transition: color 0.3s ease;
}

.navbar.navbar-scrolled .menu-toggle {
    color: var(--blue);
}

/* ===== Hero 轮播 Banner ===== */
.hero {
    position: relative;
    padding: 0;
    margin: 0px;
    height: calc(100vh - 50px);
    min-height: 480px;
    overflow: hidden;
}

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

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

.hero-slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

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

.hero-slide-bg {
    position: absolute;
    /*inset: -2%;*/
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transform: scale(1);
    transition: transform 6s ease;
}

.hero-slide.active .hero-slide-bg {
    transform: scale(1.05);
}

.hero-slide:nth-child(1) .hero-slide-bg {
    background: url("../images/banner1.jpg") no-repeat center center / 100% 100%;
}

/*.hero-slide:nth-child(2) .hero-slide-bg {*/
/*    background: url("../images/banner2.png") 100%;*/
/*}*/

/*.hero-slide:nth-child(3) .hero-slide-bg {*/
/*    background: url("../images/banner1.png") 100%;*/
/*}*/

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(0, 30, 60, 0.55) 0%, rgba(0, 30, 60, 0.15) 60%, transparent 100%);
    z-index: 1;
    background-color: rgba(0,0,0,0.3);
}

.hero-slide .container {
    position: relative;
    z-index: 2;
    width: 100%;

}

.hero-content {
    position: relative;
    z-index: 2;

    padding:50px;
    color: var(--white);
    max-width: 900px;
    transform: translateY(24px);
    opacity: 0;
    transition: transform 0.7s ease 0.2s, opacity 0.7s ease 0.2s;
}

.hero-slide.active .hero-content {
    transform: translateY(0);
    opacity: 1;
}

.hero-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.35);
    background: rgba(255,255,255,0.1);
    color: var(--white);
    font-size: 1rem;
    cursor: pointer;
    backdrop-filter: blur(6px);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-arrow:hover {
    background: var(--red);
    border-color: var(--red);
}

.hero-arrow.prev { left: 24px; }
.hero-arrow.next { right: 24px; }

.hero-dots {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 10px;
}

.hero-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.35);
    cursor: pointer;
    padding: 0;
    transition: var(--transition);
}

.hero-dot.active {
    background: var(--red);
    width: 28px;
    border-radius: 5px;
}

.hero-dot:hover { background: rgba(255,255,255,0.7); }
.hero-dot.active:hover { background: var(--red-hover); }

.hero-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: var(--red);
    z-index: 10;
    width: 0;
    transition: width linear;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 150, 64, 0.25);
    border: 1px solid rgba(0, 150, 64, 0.5);
    padding: 6px 18px;
    border-radius: 30px;
    font-size: 1.8rem;
    margin-bottom: 24px;
    backdrop-filter: blur(4px);
}

.hero-tag i { color: var(--green-light); }

.hero h1 {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero h1 em {
    font-style: normal;
    color: var(--green-light);
}

.hero-desc {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 32px;
    line-height: 1.8;
    font-weight: 300;
}

.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--red);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--red-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(227, 38, 25, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.6);
}

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

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.5);
    font-size: 0.8rem;
    text-align: center;
    animation: bounce 2s infinite;
    z-index: 10;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== 通用区块 ===== */
section { padding: 80px 0; }
section.hero { padding: 0; }

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
}

.section-header .label {
    display: inline-block;
    color: var(--green);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 16px;
}

.section-header p {
    color: var(--gray-600);
    font-size: 1.05rem;
}

.section-header .divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--blue), var(--green));
    margin: 20px auto 0;
    border-radius: 2px;
}

/* ===== 数据统计 ===== */
.stats {
    background: var(--blue);
    padding: 45px 0;
    margin-top: -1px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0px 32px;
}

.stat-item {
    text-align: center;
    color: var(--white);
    padding: 0px 16px;
    display: flex;
    align-items: center;
    flex-direction: column;
}

.stat-item .number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-item .number span { font-size: 2.4rem; }
.stat-item .number .wz { font-size: 1.2rem; }


.stat-item .label-text {
    font-size: 0.95rem;
    opacity: 0.85;
}

.stat-item .icon {
    font-size: 3rem;
    color: var(--blue-light);
    margin-bottom: 12px;
    border: 1px solid var(--green-light);
    background-color: var(--gray-200);
    width: 100px;
    height: 100px;
    border-radius: 50%;
    transform: scale(1);
    transition: transform 1s ease;
}
.stat-item .icon:hover {
    font-size: 3rem;
    transform: scale(1.2);

    color: var(--gray-200);
    margin-bottom: 12px;
    border: 1px solid var(--gray-200);
    background-color: var(--green-light);
    width: 100px;
    height: 100px;
    border-radius: 50%;
}

/* ===== 产品分类 ===== */
.products { background: var(--gray-50); }



.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
/*.product-grid {*/
/*    display: grid;*/
/*    grid-template-columns: repeat(2, 1fr);*/
/*    gap: 24px;*/
/*}*/
/*.product-card:nth-child(1),*/
/*.product-card:nth-child(2) {*/
/*    grid-column: span 2;*/
/*    display: grid;*/
/*    grid-template-columns: 40% 60%;*/
/*}*/
/*.product-card:nth-child(3),*/
/*.product-card:nth-child(4) {*/
/*    grid-column: span 1;*/
/*}*/

/*.product-card:nth-child(1),*/
/*.product-card:nth-child(2) {*/
/*    border: 2px solid #a82a19;*/
/*    box-shadow: 0 8px 24px rgba(25, 84, 168, 0.12);*/
/*    transform: translateY(-4px);*/
/*}*/
/*.product-card:nth-child(1)::before,*/
/*.product-card:nth-child(2)::before{*/
/*    content:"核心主营";*/
/*    position:absolute;*/
/*    top:12px;*/
/*    right:12px;*/
/*    background:#1954a8;*/
/*    color:#fff;*/
/*    padding:4px 10px;*/
/*    font-size:12px;*/
/*    border-radius:4px;*/
/*    z-index:2;*/
/*}*/
/*.product-card:nth-child(3),*/
/*.product-card:nth-child(4) {*/
/*    opacity:0.88;*/
/*    box-shadow: 0 2px 8px rgba(0,0,0,0.06);*/
/*}*/




.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    group: product;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.product-card-img {
    /*height: 360px;*/
    height: 200px;
    background: linear-gradient(145deg, var(--blue) 0%, var(--blue-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-card-img::before {
    content: '';
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 120px;
    height: 120px;
    background: rgba(0, 150, 64, 0.2);
    border-radius: 50%;
}

.product-card-img i {
    font-size: 3.5rem;
    color: rgba(255,255,255,0.85);
    position: relative;
    z-index: 1;
}

.product-card:nth-child(2) .product-card-img {
    background: linear-gradient(145deg, var(--green) 0%, var(--green-light) 100%);
}

.product-card:nth-child(3) .product-card-img {
    background: linear-gradient(145deg, #c0392b 0%, var(--red) 100%);
}

.product-card:nth-child(4) .product-card-img {
    background: linear-gradient(145deg, #34495e 0%, var(--dark) 100%);
}

.product-card-body { padding: 24px; }

.product-card-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 10px;
}

.product-card-body p {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin-bottom: 16px;
    line-height: 1.7;
}

.product-card-body .link {
    color: var(--blue);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.product-card-body .link:hover { color: var(--green); }

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 14px;
}

.product-tags span {
    background: var(--gray-100);
    color: var(--gray-600);
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 4px;
}

/* ===== 关于天宇 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--blue-dark), var(--blue));
}

.about-image-inner {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    gap: 8px;
    transform: scale(1);
    transition: transform 1s ease;
}
.about-image-inner:hover {
    transform: scale(1.2);
}

.about-image-inner i { font-size: 3rem; opacity: 0.4; }

.about-badge {
    position: absolute;
    bottom: 24px;
    right: -16px;
    background: var(--red);
    color: var(--white);
    padding: 20px 28px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.about-badge .year {
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1;
}

.about-badge .text { font-size: 0.85rem; margin-top: 4px; }

.about-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--gray-600);
    margin-bottom: 16px;
    text-align: justify;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 28px;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px;
    background: var(--gray-50);
    border-radius: var(--radius);
    border-left: 3px solid var(--green);
}

.about-feature i {
    color: var(--green);
    font-size: 1.1rem;
    margin-top: 2px;
}

.about-feature strong {
    display: block;
    font-size: 0.9rem;
    color: var(--blue-dark);
    margin-bottom: 2px;
}

.about-feature span {
    font-size: 0.82rem;
    color: var(--gray-600);
}

/* ===== 技术实力 ===== */
.tech {  }

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.tech-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 4px solid transparent;
}

.tech-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.tech-card:nth-child(1) { border-top-color: var(--blue); }
.tech-card:nth-child(2) { border-top-color: var(--green); }
.tech-card:nth-child(3) { border-top-color: var(--red); }

.tech-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
}

.tech-card:nth-child(1) .tech-icon { background: rgba(0, 90, 156, 0.1); color: var(--blue); }
.tech-card:nth-child(2) .tech-icon { background: rgba(0, 150, 64, 0.1); color: var(--green); }
.tech-card:nth-child(3) .tech-icon { background: rgba(227, 38, 25, 0.1); color: var(--red); }

.tech-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 12px;
}

.tech-card p {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.tech-list {
    list-style: none;
    text-align: left;
}

.tech-list li {
    padding: 6px 0;
    font-size: 0.85rem;
    color: var(--gray-600);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tech-list li i {
    color: var(--green);
    font-size: 0.7rem;
}

/* ===== 资质认证 ===== */
.certs {
    background: var(--blue-dark);
    color: var(--white);
    padding: 60px 0;
}

.certs .section-header h2 { color: var(--white); }
.certs .section-header p { color: rgba(255,255,255,0.7); }

.cert-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.cert-item {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius);
    padding: 28px 16px;
    text-align: center;
    transition: var(--transition);
}

.cert-item:hover {
    background: rgba(255,255,255,0.14);
    transform: translateY(-3px);
}

.cert-item i {
    font-size: 2.2rem;
    color: var(--green-light);
    margin-bottom: 12px;
}

.cert-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.cert-item p {
    font-size: 0.78rem;
    opacity: 0.6;
}

/* ===== 合作伙伴 ===== */
.partners { background: var(--gray-50);/**padding: 60px 0;**/ }

.partner-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    transition: var(--transition);
    overflow: hidden;
    cursor: pointer;
}

.partner-item img {
    max-width: 100%;
    max-height: 100px;
    object-fit: contain;
    filter: grayscale(30%);
    opacity: 0.85;
    transition: transform 0.35s ease, filter 0.35s ease, opacity 0.35s ease;
}

.partner-item:hover {
    border-color: var(--blue);
    background: var(--white);
    box-shadow: 0 4px 16px rgba(0, 80, 150, 0.12);
}

.partner-item:hover img {
    transform: scale(1.25);
    filter: grayscale(0%);
    opacity: 1;
}

/* ===== 核心产品展示 ===== */
.hot-products { background: var(--gray-50); }

.hot-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.hot-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.hot-card:hover { box-shadow: var(--shadow-lg); }

.hot-card-img {
    height: 240px;
    /*background: var(--gray-100);*/
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    font-size: 2.5rem;
    opacity: 0.85;
    transition: transform 0.35s ease, filter 0.35s ease, opacity 0.35s ease;
}

.hot-card-img:hover {
    transform: scale(1.1);
    filter: grayscale(0%);
    opacity: 1;
}

.hot-card-body { padding: 40px 22px; }

.hot-card-body h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 8px;
}

.hot-card-body p {
    font-size: 0.85rem;
    color: var(--gray-600);
    margin-bottom: 12px;
}

.hot-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--gray-400);
}

.hot-specs span i { color: var(--green); margin-right: 4px; }

/* ===== 新闻动态 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.news-card-img {
    min-height: 280px;
    background: linear-gradient(135deg, var(--blue) 0%, var(--green) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.3);
    font-size: 2rem;
}
.news-card-img img {
    width: 100%;
    height: 280px;
}

.news-card-body { padding: 22px; }

.news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.news-date {
    font-size: 0.8rem;
    color: var(--gray-400);
}

.news-tag {
    font-size: 0.72rem;
    padding: 2px 10px;
    border-radius: 4px;
    font-weight: 600;
}

.news-tag.company { background: rgba(0, 90, 156, 0.1); color: var(--blue); }
.news-tag.industry { background: rgba(0, 150, 64, 0.1); color: var(--green); }

.news-card-body h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--blue-dark);
    margin-bottom: 8px;
    line-height: 1.5;
}

.news-card-body p {
    font-size: 0.88rem;
    color: var(--gray-600);
}

.view-all {
    text-align: center;
    margin-top: 40px;
}

.view-all a {
    color: var(--blue);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.view-all a:hover { color: var(--green); }

/* ===== 联系我们 / 询盘 ===== */
.contact {
    background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 100%);
    color: var(--white);
    padding: 80px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-info > p {
    opacity: 0.85;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-item .icon-box {
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item .icon-box i { color: var(--green-light); }

.contact-item strong {
    display: block;
    font-size: 0.85rem;
    opacity: 0.7;
    margin-bottom: 4px;
}

.contact-item span { font-size: 1rem; }

.contact-form {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.contact-form h3 {
    font-size: 1.2rem;
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 6px;
    opacity: 0.8;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 8px;
    background: rgba(255,255,255,0.06);
    color: var(--white);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,0.35); }

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--green-light);
    background: rgba(255,255,255,0.1);
}

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

.form-group select option { color: var(--gray-800); background: var(--white); }

.btn-submit {
    width: 100%;
    background: var(--red);
    color: var(--white);
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-submit:hover { background: var(--red-hover); }

/* ===== 页脚 ===== */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.6);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);

}

.footer-brand img { height: 60px; margin-bottom: 16px; filter: brightness(1.1); }

.footer-brand p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: rgba(255,255,255,0.06);
    color: rgba(255,255,255,0.5);
    margin-right: 8px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--blue);
    color: var(--white);
}

.footer-col h4 {
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-col ul { list-style: none; }

.footer-col li { margin-bottom: 10px; }

.footer-col a {
    font-size: 1rem;
    color: rgba(255,255,255,0.55);
}

.footer-col a:hover { color: var(--green-light); }

.footer-bottom {
    padding: 20px 0px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.96rem;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .logo-text {
        font-size: 1rem;
    }
    .logo-text small {
        font-size: 0.65rem;
    }
    .nav-links a {
        font-size: 1rem;
    }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .tech-grid { grid-template-columns: 1fr; }
    .cert-grid { grid-template-columns: repeat(3, 1fr); }
    .hot-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        box-shadow: var(--shadow);
    }

    .nav-links.open { display: flex; }

    /* 移动端下拉菜单始终用深色文字 */
    .nav-links a,
    .nav-links a:hover,
    .nav-links a.active {
        color: var(--gray-800);
    }

    .nav-links a.nav-cta,
    .nav-links a.nav-cta:hover {
        color: var(--white) !important;
        text-align: center;
    }

    .menu-toggle { display: block; }

    .hot-card-img {
        height: auto;
    }
    .hot-card-body { padding:22px; }

    .product-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
    .hot-grid, .news-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .about-features { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .hero { min-height: 420px; height: calc(100vh - 100px); }
    .hero-arrow { width: 40px; height: 40px; font-size: 0.85rem; }
    .hero-arrow.prev { left: 12px; }
    .hero-arrow.next { right: 12px; }
    .hero-dots { bottom: 70px; }
    section { padding: 56px 0; }
    .footer-bottom {
        padding: 20px 10px;
    }
}