/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #0066CC;
    --dark-blue: #003366;
    --accent-red: #CC0000;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #F5F5F5;
    --white: #FFFFFF;
}

body {
    font-family: 'Open Sans', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    color: var(--dark-blue);
    line-height: 1.3;
}

h1 { font-size: 48px; }
h2 { font-size: 36px; }
h3 { font-size: 28px; }
h4 { font-size: 22px; }

a {
    text-decoration: none;
    color: var(--primary-blue);
    transition: all 0.3s ease;
}

a:hover {
    color: var(--accent-red);
}

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

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

.text-center {
    text-align: center;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

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

.btn-secondary:hover {
    background-color: #990000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(204, 0, 0, 0.3);
}

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

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

/* ===== Header ===== */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo img {
    height: 60px;
    width: auto;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav a {
    color: var(--text-dark) !important;
    font-weight: 600;
    font-size: 15px;
    padding: 8px 0;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-blue);
    transition: width 0.3s ease;
}

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

.btn-contact {
    background-color: var(--accent-red);
    color: var(--white) !important;
    padding: 10px 24px;
    border-radius: 4px;
}

.btn-contact::after {
    display: none;
}

.btn-contact:hover {
    background-color: #990000;
    transform: translateY(-2px);
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--dark-blue);
    transition: all 0.3s ease;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    height: 600px;
    background-image: url('../images/team_photo.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 51, 102, 0.7), rgba(0, 102, 204, 0.5));
}

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--white);
    max-width: 900px;
    padding: 0 20px;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 56px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    color: var(--white);
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 40px;
    font-weight: 300;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
}

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

/* ===== Key Numbers ===== */
.key-numbers {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.numbers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.number-card {
    background-color: var(--white);
    padding: 40px 30px;
    text-align: center;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-top: 4px solid var(--primary-blue);
}

.number-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.number-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.number-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.number-label {
    font-size: 16px;
    color: var(--text-light);
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    margin-bottom: 15px;
}

/* ===== About Section ===== */
.about-section {
    padding: 80px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 18px;
    line-height: 1.8;
}

.about-logo {
    text-align: center;
}

.about-logo img {
    max-width: 300px;
    margin: 0 auto;
}

/* ===== Video Section ===== */
.video-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    max-width: 900px;
    margin: 0 auto;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* ===== Gallery Preview ===== */
.gallery-preview {
    padding: 80px 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: all 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: var(--white);
    padding: 20px 15px 15px;
    font-size: 14px;
    font-weight: 600;
}

/* ===== CTA Section ===== */
.cta-section {
    padding: 80px 0;
    background-color: var(--primary-blue);
    color: var(--white);
    text-align: center;
}

.cta-section h2 {
    color: var(--white);
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 20px;
    margin-bottom: 30px;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--dark-blue);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: var(--white);
    font-size: 18px;
    margin-bottom: 20px;
}

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

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

.footer-col a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

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

.footer-col p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    h1 { font-size: 32px; }
    h2 { font-size: 28px; }
    h3 { font-size: 22px; }
    
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }
    
    .nav.active {
        display: block;
    }
    
    .nav ul {
        flex-direction: column;
        padding: 20px;
        gap: 15px;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        height: 400px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .about-logo img {
        max-width: 200px;
    }
    
    .numbers-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .logo img {
        height: 45px;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
}

/* ===== Additional Styles for New Pages ===== */

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    padding: 80px 0 60px;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 20px;
    opacity: 0.9;
}

/* Content Sections */
.content-section {
    padding: 80px 0;
}

.content-section.bg-light {
    background: var(--bg-light);
}

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

.section-header h2 {
    font-size: 36px;
    color: var(--dark-blue);
    margin-bottom: 15px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-light);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.content-text p {
    margin-bottom: 20px;
    line-height: 1.8;
}

.content-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

/* Two Column Grid */
.two-column-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

/* Info Cards */
.info-card {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.info-card h3 {
    color: var(--dark-blue);
    margin-bottom: 20px;
    font-size: 24px;
}

.info-card p {
    margin-bottom: 15px;
    line-height: 1.6;
}

.info-card strong {
    color: var(--primary-blue);
}

/* Values Grid */
.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.value-card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.value-card:hover {
    transform: translateY(-5px);
}

.value-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.value-card h3 {
    color: var(--dark-blue);
    margin-bottom: 15px;
}

/* Team Grid */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.team-card {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.team-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.team-role {
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: 15px;
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.info-item {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.info-item strong {
    display: block;
    color: var(--primary-blue);
    font-size: 14px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

/* Timeline */
.timeline {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
}

.timeline-date {
    min-width: 120px;
    font-weight: 700;
    color: var(--primary-blue);
    font-size: 18px;
}

.timeline-content {
    flex: 1;
    background: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.timeline-content h3 {
    color: var(--dark-blue);
    margin-bottom: 10px;
}

/* Transport Chain */
.transport-chain {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.transport-step {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    min-width: 250px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.transport-step h3 {
    color: var(--dark-blue);
    margin-bottom: 15px;
}

.transport-arrow {
    font-size: 32px;
    color: var(--primary-blue);
    font-weight: 700;
}

/* Infrastructure Grid */
.infrastructure-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.infra-card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.infra-card h3 {
    color: var(--dark-blue);
    margin-bottom: 20px;
}

.infra-card ul {
    list-style: none;
    padding: 0;
}

.infra-card ul li {
    padding: 8px 0;
    border-bottom: 1px solid var(--bg-light);
}

.infra-card ul li:before {
    content: "✓ ";
    color: var(--primary-blue);
    font-weight: 700;
    margin-right: 10px;
}

/* Location Details */
.location-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.location-item {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.location-item h3 {
    color: var(--dark-blue);
    margin-bottom: 20px;
}

/* Geology Grid */
.geology-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.geology-card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.geology-card h3 {
    color: var(--dark-blue);
    margin-bottom: 15px;
}

/* Approvals Timeline */
.approvals-timeline {
    max-width: 900px;
    margin: 0 auto;
}

.approval-item {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    gap: 25px;
}

.approval-icon {
    font-size: 48px;
    min-width: 60px;
}

.approval-item h3 {
    color: var(--dark-blue);
    margin-bottom: 10px;
}

/* CTA Buttons */
.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 30px;
}

/* Responsive */
@media (max-width: 768px) {
    .content-grid,
    .two-column-grid,
    .location-details {
        grid-template-columns: 1fr;
    }
    
    .values-grid,
    .team-grid,
    .info-grid,
    .infrastructure-grid,
    .geology-grid {
        grid-template-columns: 1fr;
    }
    
    .transport-chain {
        flex-direction: column;
    }
    
    .transport-arrow {
        transform: rotate(90deg);
    }
    
    .timeline-item {
        flex-direction: column;
        gap: 15px;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}

/* ===== 强制修复导航栏颜色 - 最高优先级 ===== */
.header .nav a,
.header .nav ul li a,
header .nav a,
header nav a,
.nav a,
nav a {
    color: #333333 !important;
}

.header .nav a:hover,
.header .nav a:visited,
.header .nav a:link,
.header .nav a:active,
.nav a:hover,
.nav a:visited,
.nav a:link,
.nav a:active {
    color: #333333 !important;
}

/* Contact按钮保持红色 */
.nav .btn-contact,
.nav a.btn-contact,
a.btn-contact {
    color: #FFFFFF !important;
    background-color: #CC0000 !important;
}