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

.de_iv_adv {
    width: 100%;
    height: auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 5px 0;
    /* background-color: #F8F8F8; */
    margin: 70px 0 0px;
}

/* 底部广告位 */
.postionFixed {
    width: 100%;
    min-height: 60px;
    position: fixed;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #F8F8F8;
    right: 0;
    left: 0;
    bottom: 0;
    z-index: 9999;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #2d3748;
    background-color: #fef7f0;
}

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

/* Navigation */
.navbar {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    box-shadow: 0 2px 10px rgba(255, 107, 53, 0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: white;
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-icon {
    font-size: 1rem;
    display: inline-block;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* About Hero */
.about-hero {
    background: linear-gradient(135deg, #fef7f0 0%, #fff5e6 100%);
    padding: 120px 0 80px;
    overflow: hidden;
    position: relative;
}

.about-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23ff6b35" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: left;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 107, 53, 0.1);
    color: #ff6b35;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 107, 53, 0.2);
}

.badge-icon {
    font-size: 1rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #4a5568;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: #4a5568;
    margin-top: 0.25rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-icon {
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #ff6b35;
    border: 2px solid #ff6b35;
}

.btn-secondary:hover {
    background: #ff6b35;
    color: white;
    transform: translateY(-2px);
}

.hero-visual {
    position: relative;
}

.hero-image-container {
    position: relative;
}

.hero-main-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.floating-card {
    position: absolute;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: float 3s ease-in-out infinite;
    border: 1px solid rgba(255, 107, 53, 0.1);
}

.card-1 {
    top: 10%;
    right: -10%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 30%;
    left: -15%;
    animation-delay: 1s;
}

.card-3 {
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.card-icon {
    font-size: 1.5rem;
}

.card-text {
    font-weight: 600;
    color: #2d3748;
    font-size: 0.9rem;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-10px);
    }
}

/* Mission Section */
.mission {
    padding: 80px 0;
    background: white;
}

.section-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.content-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1.5rem;
}

.content-text p {
    font-size: 1.1rem;
    color: #4a5568;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.mission-points {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.point {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.point-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.point h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.point p {
    color: #4a5568;
    font-size: 1rem;
}

.content-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

/* Values Section */
.values {
    padding: 80px 0;
    background: linear-gradient(135deg, #fef7f0 0%, #fff5e6 100%);
}

.values h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 3rem;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.value-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #fed7aa;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.1);
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.value-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.value-card p {
    color: #4a5568;
    line-height: 1.6;
}

/* Team Section */
.team {
    padding: 80px 0;
    background: white;
}

.team h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1rem;
}

.team-intro {
    text-align: center;
    font-size: 1.1rem;
    color: #4a5568;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.team-member {
    background: #fef7f0;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #fed7aa;
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.1);
}

.team-member img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1.5rem;
    border: 4px solid #ff6b35;
}

.team-member h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.team-member p {
    font-size: 1rem;
    color: #ff6b35;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.team-member span {
    font-size: 0.9rem;
    color: #4a5568;
    line-height: 1.5;
}

/* Stats Section */
.stats {
    padding: 80px 0;
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Copyright Section */
.copyright-section {
    padding: 80px 0;
    background: white;
}

.copyright-content h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 3rem;
}

.copyright-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.copyright-item {
    background: #fef7f0;
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #fed7aa;
}

.copyright-item h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #ff6b35;
    margin-bottom: 1rem;
}

.copyright-item p {
    color: #4a5568;
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.copyright-item p:last-child {
    margin-bottom: 0;
}

/* Footer */
.footer {
    background: #2d3748;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #ff6b35;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #ff6b35;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: #4a5568;
    text-decoration: none;
    transition: all 0.3s ease;
    border-radius: 50%;
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid rgba(255, 107, 53, 0.2);
}

.social-links a:hover {
    color: white;
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.social-icon {
    font-size: 1.2rem;
    display: inline-block;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 2rem;
    color: #cbd5e0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-legal-links {
    display: flex;
    gap: 2rem;
}

.footer-legal-links a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

.footer-legal-links a:hover {
    color: #ff6b35;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 0;
        flex-direction: column;
        background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
        width: 100vw;
        height: 100vh;
        text-align: center;
        transition: left 0.3s ease-in-out;
        box-shadow: none;
        padding: 0;
        z-index: 9999;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 2rem;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu .nav-link {
        font-size: 1.5rem;
        font-weight: 600;
        color: white;
        text-decoration: none;
        padding: 1rem 2rem;
        border-radius: 12px;
        transition: all 0.3s ease;
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.2);
        min-width: 200px;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .nav-menu .nav-link:hover,
    .nav-menu .nav-link.active {
        background: rgba(255, 255, 255, 0.2);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    }

    .nav-toggle {
        display: flex;
        z-index: 10000;
        position: relative;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .nav-toggle .bar {
        transition: all 0.3s ease;
    }

    .nav-icon {
        font-size: 1rem;
        display: inline-block;
    }

    .nav-menu .nav-link:hover,
    .nav-menu .nav-link.active {
        background: rgba(255, 255, 255, 0.2);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    }

    .nav-toggle {
        display: flex;
        z-index: 10000;
        position: relative;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .nav-toggle .bar {
        transition: all 0.3s ease;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }

    .hero-content {
        text-align: center;
        padding: 0 1rem;
    }

    .hero-badge {
        margin-bottom: 1.5rem;
        font-size: 0.85rem;
        padding: 0.4rem 0.8rem;
    }

    .hero-content h1 {
        font-size: 2.2rem;
        line-height: 1.3;
        margin-bottom: 1.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 2rem;
        max-width: 100%;
    }

    .hero-stats {
        justify-content: center;
        gap: 1.5rem;
        margin-bottom: 2rem;
        flex-wrap: wrap;
    }

    .hero-stats .stat-item {
        min-width: 120px;
    }

    .hero-stats .stat-number {
        font-size: 1.8rem;
    }

    .hero-stats .stat-label {
        font-size: 0.8rem;
    }

    .hero-buttons {
        justify-content: center;
        gap: 1rem;
        flex-wrap: wrap;
    }

    .hero-buttons .btn {
        min-width: 160px;
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }

    .hero-visual {
        order: -1;
        margin-bottom: 1rem;
    }

    .hero-main-image {
        border-radius: 12px;
        max-height: 250px;
        object-fit: cover;
    }

    .floating-card {
        display: none;
    }

    .section-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .content-text h2,
    .values h2,
    .team h2,
    .copyright-content h2 {
        font-size: 2rem;
    }

    .values-grid,
    .team-grid,
    .copyright-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .about-hero {
        padding: 100px 0 60px;
    }

    .hero-content {
        padding: 0 0.5rem;
    }

    .hero-content h1 {
        font-size: 1.8rem;
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        line-height: 1.5;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 1.5rem;
    }

    .hero-stats .stat-item {
        min-width: auto;
        padding: 0.5rem;
    }

    .hero-stats .stat-number {
        font-size: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 250px;
        padding: 0.75rem 1.25rem;
        font-size: 0.85rem;
    }

    .hero-main-image {
        max-height: 200px;
        border-radius: 8px;
    }

    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .footer-legal-links {
        gap: 1rem;
    }

    .mission,
    .values,
    .team,
    .stats,
    .copyright-section {
        padding: 60px 0;
    }

    .value-card,
    .team-member,
    .copyright-item {
        padding: 1.5rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}