*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
:root {
    --bg: #0b0f1a;
    --surface: #131827;
    --surface2: #1a2035;
    --primary: #1a73e8;
    --primary-light: #4a9eff;
    --text: #e8edf5;
    --text2: #9aa8c7;
    --radius: 20px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --glass: rgba(26, 35, 53, 0.7);
    --border: rgba(255, 255, 255, 0.06);
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}
a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color 0.3s;
}
a:hover {
    color: #fff;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
ul {
    list-style: none;
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(11, 15, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background 0.4s;
}
header.scrolled {
    background: rgba(11, 15, 26, 0.95);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    max-width: 1280px;
    margin: 0 auto;
}
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    letter-spacing: 1px;
}
.logo svg {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}
nav {
    display: flex;
    align-items: center;
    gap: 32px;
}
nav a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text2);
    position: relative;
    padding: 4px 0;
    transition: color 0.3s;
}
nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}
nav a:hover,
nav a.active {
    color: #fff;
}
nav a:hover::after,
nav a.active::after {
    width: 100%;
}
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
}
.mobile-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: 0.3s;
}
.search-box {
    display: flex;
    align-items: center;
    background: var(--surface);
    border-radius: 30px;
    padding: 6px 16px;
    border: 1px solid var(--border);
}
.search-box input {
    background: transparent;
    border: none;
    color: #fff;
    padding: 6px 8px;
    font-size: 14px;
    outline: none;
    width: 140px;
}
.search-box input::placeholder {
    color: var(--text2);
}
.search-box button {
    background: var(--primary);
    border: none;
    color: #fff;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}
.search-box button:hover {
    background: var(--primary-light);
}
.hero {
    position: relative;
    padding-top: 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: radial-gradient(ellipse at 20% 50%, #1a2a4a 0%, transparent 60%), radial-gradient(ellipse at 80% 50%, #0f1a2e 0%, transparent 50%);
}
.hero-slider {
    position: relative;
    z-index: 1;
    width: 100%;
}
.hero-slide {
    display: none;
    padding: 60px 24px;
    text-align: center;
    animation: fadeIn 0.8s ease;
}
.hero-slide.active {
    display: block;
}
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.hero h1 {
    font-size: 52px;
    font-weight: 800;
    background: linear-gradient(135deg, #fff 30%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    line-height: 1.2;
}
.hero p {
    font-size: 20px;
    color: var(--text2);
    max-width: 600px;
    margin: 0 auto 32px;
}
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(26, 115, 232, 0.4);
}
.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(26, 115, 232, 0.5);
}
.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.2);
}
.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(26, 115, 232, 0.1);
}
section {
    padding: 80px 0;
}
.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff 30%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-subtitle {
    text-align: center;
    color: var(--text2);
    font-size: 18px;
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.card {
    background: var(--glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    transition: all 0.4s;
    opacity: 0;
    transform: translateY(40px);
}
.card.visible {
    opacity: 1;
    transform: translateY(0);
}
.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow);
    border-color: rgba(26, 115, 232, 0.3);
}
.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary), #2a5fa8);
}
.card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #fff;
}
.card p {
    color: var(--text2);
    font-size: 15px;
    line-height: 1.7;
}
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}
.about-text p {
    margin-bottom: 16px;
    color: var(--text2);
    font-size: 16px;
}
.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 32px;
}
.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--glass);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
}
.stat-label {
    color: var(--text2);
    font-size: 14px;
    margin-top: 4px;
}
.team-card {
    text-align: center;
    padding: 32px 20px;
}
.team-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary), #2a5fa8);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #fff;
}
.timeline {
    position: relative;
    padding-left: 40px;
    max-width: 700px;
    margin: 0 auto;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), transparent);
}
.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 24px;
    opacity: 0;
    transform: translateX(-30px);
    transition: 0.6s;
}
.timeline-item.visible {
    opacity: 1;
    transform: translateX(0);
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid var(--bg);
}
.timeline-year {
    font-size: 14px;
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 4px;
}
.timeline-text {
    color: var(--text2);
    font-size: 15px;
}
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 24px;
    align-items: center;
}
.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--glass);
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: 0.3s;
    opacity: 0;
    transform: scale(0.9);
}
.partner-item.visible {
    opacity: 1;
    transform: scale(1);
}
.partner-item:hover {
    border-color: var(--primary);
    background: var(--surface2);
}
.testimonial-card {
    background: var(--glass);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--border);
    transition: 0.4s;
}
.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}
.testimonial-text {
    font-style: italic;
    color: var(--text2);
    margin-bottom: 16px;
    font-size: 16px;
}
.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}
.testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #2a5fa8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
}
.article-card {
    background: var(--glass);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: 0.4s;
}
.article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}
.article-content {
    padding: 24px;
}
.article-date {
    font-size: 13px;
    color: var(--text2);
    margin-bottom: 8px;
}
.article-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: #fff;
}
.article-card p {
    color: var(--text2);
    font-size: 14px;
    margin-bottom: 16px;
}
.faq-item {
    background: var(--glass);
    border-radius: 16px;
    margin-bottom: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: 0.3s;
}
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 17px;
    font-weight: 500;
    color: #fff;
    transition: 0.3s;
    user-select: none;
}
.faq-question:hover {
    background: var(--surface2);
}
.faq-icon {
    transition: transform 0.3s;
    font-size: 20px;
}
.faq-item.active .faq-icon {
    transform: rotate(45deg);
}
.faq-answer {
    padding: 0 24px 20px;
    color: var(--text2);
    font-size: 15px;
    line-height: 1.8;
    display: none;
}
.faq-item.active .faq-answer {
    display: block;
}
.howto-steps {
    max-width: 700px;
    margin: 0 auto;
}
.howto-step {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    align-items: flex-start;
    opacity: 0;
    transform: translateY(20px);
    transition: 0.5s;
}
.howto-step.visible {
    opacity: 1;
    transform: translateY(0);
}
.howto-step-num {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
}
.howto-step-text h4 {
    font-size: 17px;
    margin-bottom: 6px;
    color: #fff;
}
.howto-step-text p {
    color: var(--text2);
    font-size: 15px;
}
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
.contact-info p {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    color: var(--text2);
    font-size: 16px;
}
.contact-info strong {
    color: #fff;
}
footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 48px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}
.footer-col h4 {
    font-size: 16px;
    margin-bottom: 16px;
    color: #fff;
}
.footer-col a {
    display: block;
    color: var(--text2);
    font-size: 14px;
    margin-bottom: 8px;
    transition: 0.3s;
}
.footer-col a:hover {
    color: #fff;
    padding-left: 4px;
}
.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    color: var(--text2);
    font-size: 13px;
}
.footer-bottom a {
    color: var(--text2);
    margin: 0 8px;
}
.footer-bottom a:hover {
    color: #fff;
}
@media (prefers-color-scheme: light) {
    :root {
        --bg: #f4f7fc;
        --surface: #ffffff;
        --surface2: #eef2f7;
        --text: #1a1e2a;
        --text2: #4a5568;
        --glass: rgba(255, 255, 255, 0.8);
        --border: rgba(0, 0, 0, 0.08);
    }
    .logo {
        color: #1a1e2a;
    }
    .hero h1 {
        -webkit-text-fill-color: initial;
        color: #1a1e2a;
        background: none;
    }
    .section-title {
        -webkit-text-fill-color: initial;
        color: #1a1e2a;
        background: none;
    }
    .card h3,
    .faq-question,
    .howto-step-text h4,
    .footer-col h4 {
        color: #1a1e2a;
    }
    .stat-number {
        color: #1a1e2a;
    }
    .search-box input {
        color: #1a1e2a;
    }
    .search-box input::placeholder {
        color: #888;
    }
    .btn-outline {
        color: #1a1e2a;
        border-color: rgba(0, 0, 0, 0.2);
    }
    header {
        background: rgba(255, 255, 255, 0.85);
    }
    header.scrolled {
        background: rgba(255, 255, 255, 0.95);
    }
    nav a {
        color: #4a5568;
    }
    nav a:hover {
        color: #1a1e2a;
    }
    .timeline-item::before {
        border-color: #fff;
    }
    .partner-item,
    .testimonial-card,
    .article-card,
    .faq-item,
    .stat-item,
    .card {
        background: rgba(255, 255, 255, 0.9);
    }
}
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 40px;
    }
    .about-grid {
        grid-template-columns: 1fr;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .header-inner {
        padding: 10px 16px;
    }
    .logo {
        font-size: 20px;
    }
    nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg);
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        backdrop-filter: blur(20px);
    }
    nav.open {
        display: flex;
    }
    .mobile-toggle {
        display: flex;
    }
    .hero h1 {
        font-size: 32px;
    }
    .hero p {
        font-size: 16px;
    }
    .section-title {
        font-size: 28px;
    }
    .cards-grid {
        grid-template-columns: 1fr;
    }
    .about-stats {
        grid-template-columns: 1fr 1fr;
    }
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .search-box {
        display: none;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 480px) {
    .hero h1 {
        font-size: 26px;
    }
    .hero-actions {
        flex-direction: column;
    }
    .about-stats {
        grid-template-columns: 1fr;
    }
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}