body {
    font-family: 'Noto Sans SC', 'Microsoft Yahei', Arial, sans-serif;
    background: #0a1840 url('../img/背景2.png') center/cover no-repeat fixed;
    margin: 0;
}
.container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 40px;
}
.app-header {
    background: linear-gradient(90deg, #00163c 60%, #0055a5 100%);
    color: #fff;
    box-shadow: 0 2px 12px rgba(0,0,0,0.07);
    position: sticky;
    top: 0;
    z-index: 100;
}
.app-header__inner {
    display: flex;
    align-items: center;
    padding: 0 0 0 0;
    height: 80px;
}
.site-logo {
    height: 54px;
    width: auto;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-right: 18px;
    padding: 4px 8px;
}
.site-title {
    font-size: 2.1rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-right: 40px;
    color: #fff;
    flex-shrink: 0;
}
.site-nav {
    margin-left: auto;
}
.site-nav ul {
    display: flex;
    gap: 36px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.site-nav a {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 1px;
    padding: 6px 14px;
    border-radius: 4px;
    transition: background 0.2s, color 0.2s;
}
.site-nav a:hover {
    background: #ffcc00;
    color: #00163c;
}
.banner {
    position: relative;
    width: 100vw;
    min-height: 340px;
    height: 48vw;
    max-height: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(rgba(255,255,255,0.9), rgba(255,255,255,0.9)), url('../img/背景.png') center/cover no-repeat;
    overflow: hidden;
    margin-bottom: 40px;
}
.banner-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('../img/背景2.png') center/cover no-repeat, linear-gradient(120deg, #0055a5 0%, #00163c 100%);
    opacity: 0.7;
    z-index: 1;
}
.banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    animation: fadeIn 1.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: 240px;
}
@media (max-width: 900px) {
    .banner-content { padding-top: 100px; }
}
.banner-btn {
    display: inline-block;
    background-color: #0055a5;
    color: #fff;
    padding: 0.9rem 2.2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0,85,165,0.2);
    margin-top: 32px;
    font-size: 1.15rem;
    letter-spacing: 2px;
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.banner-btn:hover {
    background-color: #004488;
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0,85,165,0.25);
}
.banner-btn:hover {
    background: linear-gradient(90deg, #003366 60%, #0055a5 100%);
    color: #ffcc00;
    transform: translateY(-2px) scale(1.04);
    box-shadow: 0 8px 32px rgba(0,85,165,0.18);
}
.banner-wave {
    position: absolute;
    left: 0; right: 0; bottom: -1px;
    width: 100%;
    z-index: 3;
    pointer-events: none;
}
.banner-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    margin-bottom: 18px;
    text-shadow: 0 4px 24px rgba(0,0,0,0.18);
}
.banner-subtitle {
    font-size: 1.3rem;
    letter-spacing: 0.1em;
    opacity: 0.92;
}
main {
    margin-top: 80px;
    margin-bottom: 80px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 70vh;
}
.section {
    margin-bottom: 56px;
    animation: fadeInUp 1s;
}
.card {
    background: #fff;
    border-radius: 24px;
    box-shadow: 0 8px 48px rgba(0,85,165,0.10);
    padding: 56px 48px 48px 48px;
    margin-bottom: 56px;
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.7s cubic-bezier(.23,1.02,.32,1);
}
.card.card-animate {
    opacity: 1;
    transform: translateY(0);
}
.section h2 {
    font-size: 2.8rem;
    color: #003366;
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
    font-weight: 700;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: #0055a5;
    border-radius: 2px;
}
.brand-list {
    padding-left: 20px;
    font-size: 1.1rem;
    line-height: 2;
}
.brand-list strong {
    color: #0055a5;
}
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 400px;
}
input, textarea {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}
button[type="submit"] {
    background: #003366;
    color: #fff;
    border: none;
    padding: 12px;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}
button[type="submit"]:hover {
    background: #0055a5;
}
.footer {
    background: #00163c;
    color: #fff;
    text-align: center;
    padding: 24px 0 16px 0;
    font-size: 0.98rem;
    letter-spacing: 1px;
    margin-top: 40px;
    border-radius: 18px 18px 0 0;
}
.app-header.scrolled {
    background-color: #fff;
    box-shadow: 0 4px 15px rgba(0,85,165,0.1);
    padding: 0.8rem 0;
    transition: background 0.3s, box-shadow 0.3s;
}
.banner-title::after {
    content: '|';
    animation: blink 1s steps(1) infinite;
    margin-left: 2px;
    opacity: 0.7;
}
@keyframes blink {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 0; }
}
@media (max-width: 800px) {
    .app-header__inner, .container { padding: 0 10px; }
    .banner-title { font-size: 2rem; }
    .card { padding: 24px 10px; }
}
@media (max-width: 500px) {
    .banner-title { font-size: 1.3rem; }
    .banner-subtitle { font-size: 1rem; }
    .site-title { font-size: 1.2rem; }
    .card { padding: 12px 2vw; }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}
.product-gallery {
    padding-top: 16px;
}
.product-list {
    border-top: none;
    padding-top: 0;
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 18px;
}
.product-item {
    background: #fff;
    border-radius: 20px;
    padding: 2.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,85,165,0.05);
    margin: 15px;
    width: 340px;
    min-height: 370px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
    border: 2.5px solid transparent;
    background-clip: padding-box;
}

.product-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0,85,165,0.1);
}
.product-item::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 22px;
    padding: 2px;
    background: linear-gradient(120deg, #5ec6ff 0%, #0055a5 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    z-index: 0;
    pointer-events: none;
    opacity: 0.18;
}
.product-item:hover {
    transform: translateY(-10px) scale(1.04);
    box-shadow: 0 12px 48px 0 rgba(0,85,165,0.18);
    border-color: #5ec6ff;
}
.product-img-placeholder {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #eaf3ff 60%, #dbeafe 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
    box-shadow: 0 2px 12px rgba(0,85,165,0.10);
    overflow: hidden;
    position: relative;
}
.product-img-placeholder::after {
    content: '';
    position: absolute;
    left: 50%; top: 50%;
    transform: translate(-50%, -50%);
    width: 160px; height: 160px;
    background: radial-gradient(circle, rgba(0,85,165,0.13) 0%, rgba(0,85,165,0.01) 80%);
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
    filter: blur(2px);
}
.product-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    filter: drop-shadow(0 2px 8px rgba(0,85,165,0.10));
    position: relative;
    z-index: 1;
}
.product-info {
    position: relative;
    z-index: 2;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.product-info h3 {
    font-size: 1.22rem;
    color: #0055a5;
    margin-bottom: 10px;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #5ec6ff 0%, #0055a5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.product-info p {
    color: #333;
    font-size: 1.04rem;
    line-height: 1.8;
    text-align: center;
    margin-bottom: 18px;
}
.product-btn {
    display: inline-block;
    margin-top: 8px;
    padding: 8px 32px;
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(90deg, #5ec6ff 0%, #0055a5 100%);
    border: none;
    border-radius: 24px;
    box-shadow: 0 2px 12px rgba(0,85,165,0.13);
    letter-spacing: 1px;
    cursor: pointer;
    transition: background 0.22s, color 0.18s, transform 0.18s;
    text-decoration: none;
}
.product-btn:hover {
    background: linear-gradient(90deg, #0055a5 0%, #5ec6ff 100%);
    color: #ffcc00;
    transform: scale(1.08);
}
.product-item .product-divider {
    width: 80%;
    height: 3px;
    background: linear-gradient(90deg, #5ec6ff 0%, #0055a5 100%);
    border-radius: 2px;
    margin: 18px auto 0 auto;
    opacity: 0.13;
}
@media (max-width: 900px) {
    .product-list { flex-direction: column; align-items: center; gap: 28px; }
    .product-list { flex-direction: column; align-items: center; gap: 24px; }
    .product-item { width: 90vw; min-width: 0; }
} 

/* Banner大官网风格 */
.banner-lg {
    min-height: 520px;
    height: 48vw;
    max-height: 680px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    position: relative;
    margin-bottom: 0;
}
.banner-content-lg {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding-bottom: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
}
.banner-title {
    font-size: 3.2rem;
    font-weight: 900;
    letter-spacing: 0.18em;
    margin-bottom: 24px;
    text-shadow: 0 6px 32px rgba(0,0,0,0.18);
}
.banner-subtitle {
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    opacity: 0.95;
    text-shadow: 0 2px 12px rgba(0,0,0,0.10);
}
@media (max-width: 900px) {
    .banner-title { font-size: 2rem; }
    .banner-content-lg { padding-bottom: 24px; }
}

/* 公司介绍左右分栏 */
.about-section .about-flex {
    display: flex;
    gap: 64px;
    align-items: center;
    justify-content: space-between;
}
.about-section .about-text {
    flex: 1.5;
}

.about-section .about-text p {
    margin-bottom: 1.8rem;
    line-height: 1.9;
    font-size: 1.05rem;
    color: #444;
}
.about-section .about-img {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}
.about-logo-img {
    width: 260px;
    height: 260px;
    border-radius: 32px;
    box-shadow: 0 8px 48px rgba(0,85,165,0.10);
    background: #fff;
    object-fit: contain;
}
@media (max-width: 900px) {
    .about-section .about-flex { flex-direction: column; gap: 24px; }
    .about-logo-img { width: 160px; height: 160px; }
}

/* 品牌/产品分栏大卡片 */
.brands-section .brands-flex {
    display: flex;
    gap: 56px;
    justify-content: center;
    align-items: stretch;
    margin-top: 32px;
}
.brand-col {
    background: linear-gradient(135deg, #eaf3ff 60%, #dbeafe 100%);
    border-radius: 20px;
    box-shadow: 0 4px 32px rgba(0,85,165,0.10);
    flex: 1 1 0;
    min-width: 320px;
    max-width: 420px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 24px 32px 24px;
    margin: 0 0 0 0;
    position: relative;
    transition: box-shadow 0.3s, transform 0.3s;
}
.brand-col:hover {
    box-shadow: 0 12px 48px 0 rgba(0,85,165,0.18);
    transform: translateY(-8px) scale(1.03);
    z-index: 2;
}
.brand-img-lg {
    width: 180px;
    height: 180px;
    border-radius: 16px;
    background: #f8fafc;
    box-shadow: 0 8px 24px rgba(0,85,165,0.15);
    margin-bottom: 20px;
    object-fit: contain;
    padding: 20px;
    border: 1px solid rgba(0,85,165,0.1);
    transition: all 0.3s ease;
}

.brand-img-lg:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0,85,165,0.2);
}
.brand-col h3 {
    font-size: 1.35rem;
    color: #0055a5;
    margin-bottom: 12px;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #5ec6ff 0%, #0055a5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.brand-col p {
    color: #333;
    font-size: 1.08rem;
    line-height: 1.8;
    text-align: center;
}
@media (max-width: 900px) {
    .brands-section .brands-flex { flex-direction: column; gap: 32px; }
    .brand-col { max-width: 98vw; }
}

/* 联系方式表单 */
.contact-section form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    max-width: 420px;
    margin: 0 auto;
}

/* 联系我们页面专属卡片美化 */
.contact-section.card {
    background: rgba(10, 24, 64, 0.88);
    box-shadow: 0 8px 48px rgba(0,85,165,0.25);
    color: #fff;
    border: 1.5px solid #1e3a8a;
}
.contact-section h2 {
    color: #5ec6ff;
    text-shadow: 0 4px 24px rgba(0,85,165,0.18);
}
.contact-section p {
    color: #eaf3ff;
}
.contact-section input,
.contact-section textarea {
    background: rgba(255,255,255,0.08);
    color: #fff;
    border: 1.5px solid #5ec6ff;
    box-shadow: 0 2px 8px rgba(0,85,165,0.10);
}
.contact-section input::placeholder,
.contact-section textarea::placeholder {
    color: #b6d6ff;
}
.contact-section button[type="submit"] {
    background: linear-gradient(90deg, #0055a5 0%, #5ec6ff 100%);
    color: #fff;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 24px;
    box-shadow: 0 2px 12px rgba(0,85,165,0.13);
    transition: background 0.22s, color 0.18s, transform 0.18s;
}
.contact-section button[type="submit"]:hover {
    background: linear-gradient(90deg, #5ec6ff 0%, #0055a5 100%);
    color: #ffcc00;
    transform: scale(1.05);
}

/* 底部大官网风格 */
.footer-lg {
    background: linear-gradient(90deg, #00163c 60%, #0055a5 100%);
    color: #fff;
    padding: 48px 0 0 0;
    border-radius: 32px 32px 0 0;
    margin-top: 64px;
}
.footer-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}
.footer-info {
    display: flex;
    align-items: flex-start;
    gap: 48px;
    width: 100%;
    justify-content: center;
}
.footer-logo img {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 2px 12px rgba(0,85,165,0.10);
}
.footer-contact {
    font-size: 1.08rem;
    line-height: 2;
}
.footer-social {
    display: flex;
    gap: 18px;
    align-items: center;
    margin-top: 8px;
}
.footer-icon {
    display: inline-block;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,85,165,0.10);
    opacity: 0.85;
    transition: box-shadow 0.2s, opacity 0.2s;
}
.footer-icon.wechat { background: url('../img/logo时代科技.png') center/cover no-repeat, #fff; }
.footer-icon.weibo { background: url('../img/logo时代科技.png') center/cover no-repeat, #fff; }
.footer-icon.douyin { background: url('../img/logo时代科技.png') center/cover no-repeat, #fff; }
.footer-icon:hover { opacity: 1; box-shadow: 0 4px 16px rgba(0,85,165,0.18); }
.footer-icp {
    text-align: center;
    font-size: 0.98rem;
    color: #e0e6f6;
    margin-top: 16px;
    letter-spacing: 1px;
}