* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --deep-gray: #1A1A1F;
    --pearl-white: #F8F9FA;
    --tech-blue: #2E86AB;
    --silver-blue: #5DADEC;
    --text-dark: #333;
    --text-light: #E0E0E0;
    --text-muted: #888;
    --shadow-sm: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-md: 0 10px 40px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
}
body {
    font-family: 'Roboto', 'Noto Sans SC', 'PingFang SC', sans-serif;
    background-color: var(--pearl-white);
    color: var(--text-dark);
    line-height: 1.6;
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}
.col-12 {
    flex: 0 0 100%;
    max-width: 100%;
    padding: 0 15px;
}
.col-md-6 {
    flex: 0 0 50%;
    max-width: 50%;
    padding: 0 15px;
}
.col-md-4 {
    flex: 0 0 33.3333%;
    max-width: 33.3333%;
    padding: 0 15px;
}
@media (max-width: 768px) {
    .col-md-6, .col-md-4 {
        flex: 0 0 100%;
        max-width: 100%;
    }
    .container {
        padding: 0 20px;
    }
}
.section-header {
    text-align: center;
    margin-bottom: 64px;
}
.section-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--silver-blue);
    text-transform: uppercase;
    letter-spacing: 3px;
}
.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-top: 16px;
    letter-spacing: -0.5px;
}
.bg-dark {
    background-color: var(--deep-gray);
    color: var(--text-light);
}
.bg-dark .section-title {
    color: white;
}
.bg-light {
    background-color: var(--pearl-white);
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: var(--silver-blue);
    color: white;
    padding: 12px 32px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}
.btn-primary:hover {
    background-color: var(--tech-blue);
    transform: translateY(-2px);
}
/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 0 40px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
    background-color: transparent;
}
.navbar.scrolled {
    background-color: rgba(26,26,31,0.95);
    backdrop-filter: blur(10px);
    height: 70px;
}
.logo {
    font-size: 26px;
    font-weight: 700;
    color: white;
    text-decoration: none;
    letter-spacing: 2px;
}
.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}
.nav-links a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-size: 14px;
    transition: 0.3s;
    position: relative;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--silver-blue);
    transition: width 0.3s;
}
.nav-links a:hover::after {
    width: 100%;
}
.nav-cta {
    background: var(--silver-blue);
    padding: 8px 20px !important;
    border-radius: 4px;
    color: white !important;
}
.nav-cta::after {
    display: none;
}
.hamburger {
    display: none;
    font-size: 22px;
    color: white;
    cursor: pointer;
}
.mobile-menu {
    position: fixed;
    top: 0;
    right: -320px;
    width: 280px;
    height: 100%;
    background-color: var(--deep-gray);
    z-index: 1001;
    padding: 80px 28px 40px;
    transition: right 0.3s ease;
}
.mobile-menu.open {
    right: 0;
}
.mobile-menu a {
    display: block;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    padding: 16px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 1000;
    display: none;
    opacity: 0;
    transition: opacity 0.3s;
}
.menu-overlay.show {
    display: block;
    opacity: 1;
}
/* 时间轴 */
.timeline {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-top: 48px;
}
.milestone {
    flex: 1;
    min-width: 150px;
    text-align: center;
    padding: 24px;
    background: rgba(255,255,255,0.05);
    border-radius: 12px;
    transition: var(--transition);
}
.milestone:hover {
    background: rgba(255,255,255,0.08);
    transform: translateY(-4px);
}
.milestone .year {
    font-size: 28px;
    font-weight: 700;
    color: var(--silver-blue);
    margin-bottom: 8px;
}
.factory-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
    margin: 48px 0;
}
.factory-stat {
    text-align: center;
}
.factory-stat .number {
    font-size: 42px;
    font-weight: 700;
    color: var(--silver-blue);
}
/* 企业文化模块样式 */
.culture-card {
    background: white;
    border-radius: 12px;
    padding: 40px 32px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
    height: 100%;
}
.culture-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
}
.culture-icon {
    width: 80px;
    height: 80px;
    background: rgba(93,173,236,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: var(--silver-blue);
    font-size: 32px;
}
.culture-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--deep-gray);
}
.culture-desc {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.8;
}
/* 页脚 */
.footer {
    background-color: var(--deep-gray);
    color: var(--text-light);
    padding: 60px 0 30px;
    margin-top: 60px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    margin-bottom: 60px;
}
.footer-brand .logo {
    font-size: 24px;
    margin-bottom: 16px;
    display: inline-block;
}
.social-links {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}
.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.08);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: 0.3s;
}
.social-links a:hover {
    background: var(--silver-blue);
}
.footer-col h4 {
    font-size: 14px;
    margin-bottom: 24px;
    color: white;
}
.footer-col ul {
    list-style: none;
}
.footer-col li {
    margin-bottom: 12px;
}
.footer-col a {
    color: rgba(255,255,255,0.55);
    text-decoration: none;
    font-size: 14px;
    transition: 0.3s;
}
.footer-col a:hover {
    color: var(--silver-blue);
}
.footer-contact p {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
    font-size: 14px;
    opacity: 0.7;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    font-size: 13px;
    opacity: 0.5;
}
/* 悬浮按钮 */
.float-contact {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    background: var(--silver-blue);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(93,173,236,0.4);
    transition: var(--transition);
}
.float-contact:hover {
    transform: scale(1.1);
}
@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    .section-title {
        font-size: 30px;
    }
}
@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .social-links {
        justify-content: center;
    }
    .float-contact {
        width: 48px;
        height: 48px;
        font-size: 18px;
    }
    .culture-card {
        padding: 30px 24px;
        margin-bottom: 24px;
    }
}
.text-center {
    text-align: center;
}
.align-items-center {
    align-items: center;
}
img {
    max-width: 100%;
    border-radius: 12px;
}
/* 补充分区padding */
section {
    padding: 100px 0;
}

.container div.title{
    max-width: 300px;
    margin: 0 auto;
}

.container div.title h1{
    margin: 0 auto;
    width: 300px;
}


/* 选项卡过滤栏 */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    border-bottom: 1px solid #e9ecef;
    padding-bottom: 0.75rem;
}

.filter-btn {
    background: transparent;
    border: none;
    padding: 0.6rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    color: #6c757d;
    cursor: pointer;
    border-radius: 40px;
    transition: all 0.2s ease;
    font-family: inherit;
}

.filter-btn:hover {
    color: #0d6efd;
    background: rgba(13, 110, 253, 0.08);
}

.filter-btn.active {
    background: #0d6efd;
    color: white;
    box-shadow: 0 2px 6px rgba(13, 110, 253, 0.25);
}