@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
    --primary: #004d40; /* 墨绿 */
    --primary-light: #00695c;
    --primary-dark: #00251a;
    --accent: #ffc107; /* 金色/黄色 */
    --text: #2c3e50;
    --text-light: #7f8c8d;
    --bg: #f4f7f6;
    --white: #ffffff;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Noto Sans SC', 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Nav */
header {
    background-color: var(--primary);
    color: var(--white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-links a.active {
    color: var(--accent);
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 77, 64, 0.8), rgba(0, 77, 64, 0.8)), url('https://tse-mm.bing.com/th?q=体育场') center/cover;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
    max-width: 800px;
    animation: fadeInUp 1.2s ease;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--accent);
    color: var(--primary-dark);
    font-weight: 600;
    border-radius: 5px;
    transition: var(--transition);
}

.btn:hover {
    background-color: #e6af06;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* Section Common */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    width: 50px;
    height: 3px;
    background-color: var(--accent);
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

/* Company Intro */
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.intro-text h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--primary);
}

.stats {
    display: flex;
    gap: 40px;
    margin-top: 30px;
}

.stat-item h4 {
    font-size: 36px;
    color: var(--accent);
}

.stat-item p {
    color: var(--text-light);
}

/* News & Dynamics */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.news-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-10px);
}

.news-img {
    height: 200px;
    overflow: hidden;
}

.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-info {
    padding: 20px;
}

.news-date {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 10px;
}

.news-info h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--primary);
}

/* Dynamics List */
.dynamics-list {
    max-height: 500px;
    overflow-y: auto;
    background: var(--white);
    padding: 20px;
    border-radius: 10px;
}

.dynamic-item {
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dynamic-item:last-child {
    border-bottom: none;
}

.dynamic-tag {
    background: var(--primary);
    color: var(--white);
    padding: 2px 8px;
    font-size: 12px;
    border-radius: 3px;
}

/* Products Page */
.filter-bar {
    background: var(--white);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-group select, .filter-group input {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    outline: none;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.product-card img {
    border-radius: 10px;
    margin-bottom: 15px;
    height: 180px;
    width: 100%;
    object-fit: cover;
}

/* About Us */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: var(--primary);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    right: -17px;
    background-color: var(--white);
    border: 4px solid var(--accent);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.left { left: 0; }
.right { left: 50%; }
.right::after { left: -17px; }

.timeline-content {
    padding: 20px 30px;
    background-color: var(--white);
    position: relative;
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Contact Us */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    outline: none;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.info-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

/* Footer */
footer {
    background-color: var(--primary-dark);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-logo span {
    color: var(--accent);
}

.footer-links h4 {
    margin-bottom: 20px;
    color: var(--accent);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 14px;
    color: #aaa;
}

/* Online Service Button */
.online-service {
    position: fixed;
    right: 30px;
    bottom: 30px;
    background: var(--accent);
    color: var(--primary-dark);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    z-index: 999;
    cursor: pointer;
    transition: var(--transition);
}

.online-service:hover {
    transform: scale(1.1);
}

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

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 50px;
}

.page-btn {
    padding: 8px 16px;
    border: 1px solid #ddd;
    background: var(--white);
    color: var(--text);
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
}

.page-btn:hover {
    background: #f0f0f0;
}

.page-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.page-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Tags */
.tags-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tag {
    padding: 5px 15px;
    background: #eee;
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.tag:hover, .tag.active {
    background: var(--primary);
    color: var(--white);
}

/* Map Placeholder */
.map-placeholder {
    width: 100%;
    height: 300px;
    background: #e0e0e0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    margin-top: 30px;
}

/* Responsive */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .intro-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .hero-content h1 {
        font-size: 32px;
    }
    .timeline::after {
        left: 31px;
    }
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    .timeline-item::after {
        left: 19px;
    }
    .right {
        left: 0;
    }
}