@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700;800&display=swap');
:root {
    --primary-blue: #1A4F8A;
    --primary-teal: #00BFA5;
    --dark-navy: #0D2A4A;
    --text-dark: #212529;
    --text-light: #6c757d;
    --background-light: #f8f9fa;
    --background-white: #ffffff;
    --border-color: #e9ecef;
    --gradient-primary: linear-gradient(125deg, var(--primary-teal) 0%, var(--primary-blue) 100%);
    --shadow-soft: 0 8px 30px rgba(26, 79, 138, 0.08);
    --shadow-medium: 0 12px 40px rgba(26, 79, 138, 0.12);
    --transition-fast: all 0.2s ease-in-out;
    --transition-medium: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    font-size: 16px;
}
body {
    font-family: 'Be Vietnam Pro', sans-serif;
    background-color: var(--background-light);
    color: var(--text-dark);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--dark-navy);
}
p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 1.05rem;
}
a {
    text-decoration: none;
    color: var(--primary-teal);
    transition: var(--transition-fast);
}
a:hover {
    color: var(--primary-blue);
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
section {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}
.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 2rem;
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    padding-bottom: 15px;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}
@keyframes slide-in-up {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.main-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(26, 79, 138, 0.05);
    transition: var(--transition-medium);
}
.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.logo-link .logo {
    max-height: 50px;
    height: auto;
    transition: var(--transition-medium);
}
.logo-link:hover .logo {
    transform: scale(1.05);
}
.main-navigation ul {
    display: flex;
    list-style: none;
    gap: 10px;
}
.main-navigation li a {
    padding: 15px 20px;
    font-weight: 600;
    color: var(--dark-navy);
    position: relative;
    display: block;
}
.main-navigation li a::after {
    content: '';
    position: absolute;
    bottom: 10px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-medium);
    transform: translateX(-50%);
}
.main-navigation li a:hover::after,
.main-navigation li.has-submenu:hover > a::after {
    width: 60%;
}
.has-submenu {
    position: relative;
}
.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--background-white);
    box-shadow: var(--shadow-medium);
    border-radius: 0 0 12px 12px;
    min-width: 250px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    border-top: 3px solid var(--primary-teal);
}
.has-submenu:hover > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.submenu li {
    width: 100%;
}
.submenu li a {
    width: 100%;
    padding: 12px 20px;
    font-weight: 500;
    color: var(--text-dark);
}
.submenu li a:hover {
    background-color: var(--background-light);
    color: var(--primary-blue);
}
.submenu li a::after {
    display: none;
}
.cta-button {
    padding: 12px 30px;
    background: var(--gradient-primary);
    color: var(--background-white);
    font-weight: 700;
    border-radius: 50px;
    transition: var(--transition-medium);
    box-shadow: 0 5px 15px rgba(0, 191, 165, 0.3);
}
.cta-button:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 25px rgba(26, 79, 138, 0.2);
    color: var(--background-white);
}
.hero-section {
    padding: 100px 0;
    text-align: center;
}
.hero-title {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}
.partner-contact-notice {
    max-width: 800px;
    margin: 0 auto 2rem auto;
    padding: 15px 25px;
    background-color: rgba(233, 236, 239, 0.7);
    border-left: 5px solid var(--primary-teal);
    border-radius: 8px;
    font-size: 0.95rem;
    text-align: left;
}
.partner-contact-notice a {
    font-weight: 600;
}
.hero-content p {
    max-width: 900px;
    margin: 0 auto 3rem auto;
    font-size: 1.15rem;
    color: #555;
}
.hero-image-gallery {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-top: 4rem;
    perspective: 1500px;
}
.hero-image-gallery img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
    transition: var(--transition-medium);
    transform: rotateY(20deg) scale(0.9);
    opacity: 0.8;
}
.hero-image-gallery:hover img {
    transform: rotateY(0) scale(1);
    opacity: 1;
}
.hero-image-gallery img:nth-child(1) { transition-delay: 0s; }
.hero-image-gallery img:nth-child(2) { transition-delay: 0.1s; }
.hero-image-gallery img:nth-child(3) { transition-delay: 0.2s; }
.hero-image-gallery img:nth-child(4) { transition-delay: 0.3s; }
.hero-image-gallery img:nth-child(5) { transition-delay: 0.4s; }
.solutions-section, .platform-section, .knowledge-section {
    background-color: var(--background-white);
}
.solutions-section .container,
.platform-section .container,
.knowledge-section .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
}
.platform-section .container {
    grid-template-columns: 1fr 1fr;
}
#solutions p, #partners p, #knowledge p {
    text-align: left;
    font-size: 1.05rem;
}
.platform-section .container > div:first-child {
    order: 2;
}
.platform-section .container > div:last-child {
    order: 1;
}
.solutions-image-grid,
.partners-image-showcase,
.knowledge-image-layout {
    display: grid;
    gap: 15px;
}
.solutions-image-grid {
    grid-template-columns: repeat(6, 1fr);
    grid-template-rows: repeat(4, 1fr);
    height: 450px;
}
.solutions-image-grid img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: var(--shadow-soft);
    transition: var(--transition-medium);
}
.solutions-image-grid img:hover {
    transform: scale(1.05) translateZ(20px);
    box-shadow: var(--shadow-medium);
    z-index: 5;
}
.solutions-image-grid img:nth-child(1) { grid-column: 1 / 4; grid-row: 1 / 3; }
.solutions-image-grid img:nth-child(2) { grid-column: 4 / 7; grid-row: 1 / 3; }
.solutions-image-grid img:nth-child(3) { grid-column: 1 / 3; grid-row: 3 / 5; }
.solutions-image-grid img:nth-child(4) { grid-column: 3 / 5; grid-row: 3 / 5; }
.solutions-image-grid img:nth-child(5) { grid-column: 5 / 7; grid-row: 3 / 5; }
.partners-image-showcase {
    display: flex;
    gap: 15px;
    align-items: center;
    justify-content: center;
    position: relative;
    height: 450px;
}
.partners-image-showcase img {
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
    position: absolute;
    transition: var(--transition-medium);
    width: 250px;
    height: auto;
}
.partners-image-showcase:hover img {
    transform: scale(1.05);
}
.partners-image-showcase img:nth-child(1) { z-index: 3; transform: rotate(-8deg) translate(-80px, -40px); }
.partners-image-showcase img:nth-child(2) { z-index: 4; transform: scale(1.1); }
.partners-image-showcase img:nth-child(3) { z-index: 3; transform: rotate(8deg) translate(80px, -40px); }
.partners-image-showcase img:nth-child(4) { z-index: 2; transform: rotate(-15deg) translate(-150px, 120px); }
.partners-image-showcase img:nth-child(5) { z-index: 2; transform: rotate(15deg) translate(150px, 120px); }
.partners-image-showcase:hover img:nth-child(2) {
    transform: scale(1.15);
    box-shadow: var(--shadow-medium);
}
.knowledge-image-layout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 15px;
    height: 450px;
}
.knowledge-image-layout img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
    filter: saturate(0.8);
    transition: var(--transition-medium);
}
.knowledge-image-layout img:hover {
    filter: saturate(1.2);
    transform: scale(1.03);
    box-shadow: var(--shadow-medium);
    z-index: 5;
}
.knowledge-image-layout img:nth-child(1) { grid-area: 1 / 1 / 3 / 2; }
.knowledge-image-layout img:nth-child(2) { grid-area: 1 / 2 / 2 / 4; }
.knowledge-image-layout img:nth-child(3) { grid-area: 3 / 1 / 4 / 2; }
.knowledge-image-layout img:nth-child(4) { grid-area: 2 / 2 / 4 / 3; }
.knowledge-image-layout img:nth-child(5) { grid-area: 2 / 3 / 4 / 4; }
.alliance-section {
    background: linear-gradient(135deg, #f0fdfa 0%, #f8f9fa 50%, #eff6ff 100%);
    padding: 80px 0;
}
.alliance-section .section-title {
    margin-bottom: 1rem;
}
.alliance-intro {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 3rem auto;
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.8;
}
.alliance-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}
.alliance-item {
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}
.alliance-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}
.alliance-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: rgba(0, 191, 165, 0.3);
}
.alliance-item:hover::before {
    transform: scaleX(1);
}
.alliance-item h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--dark-navy);
    margin-bottom: 12px;
}
.alliance-item p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-light);
    margin-bottom: 0;
}
.alliance-section .dofollow-partner-link {
    color: var(--primary-teal);
    font-weight: 600;
    border-bottom: 1px dotted rgba(0, 191, 165, 0.5);
    padding-bottom: 1px;
}
.alliance-section .dofollow-partner-link:hover {
    color: var(--primary-blue);
    border-bottom-color: var(--primary-blue);
}
.contact-section {
    padding-bottom: 100px;
}
.contact-form {
    max-width: 700px;
    margin: 2rem auto 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 18px 25px;
    font-family: 'Be Vietnam Pro', sans-serif;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background-color: var(--background-white);
    transition: var(--transition-medium);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: #999;
}
.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-teal);
    box-shadow: 0 0 0 4px rgba(0, 191, 165, 0.15);
}
.submit-button {
    padding: 18px 35px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--background-white);
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-medium);
    box-shadow: 0 5px 20px rgba(0, 191, 165, 0.25);
}
.submit-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(26, 79, 138, 0.2);
}
.main-footer {
    background-color: var(--dark-navy);
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 30px 0;
}
.main-footer .container {
    display: flex;
    flex-direction: column;
    gap: 40px;
}
.footer-sponsors, .footer-credit {
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.sponsors-title, .credit-title {
    font-size: 1.5rem;
    color: var(--background-white);
    margin-bottom: 1rem;
    position: relative;
    padding-bottom: 10px;
}
.sponsors-title::after, .credit-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--primary-teal);
}
.sponsors-intro, .footer-credit p {
    font-size: 0.95rem;
    max-width: 900px;
    line-height: 1.8;
}
.partner-list {
    list-style: none;
    margin-top: 1.5rem;
    columns: 2;
    column-gap: 40px;
}
.partner-list li {
    margin-bottom: 15px;
    font-size: 0.9rem;
}
.dofollow-partner-link {
    font-weight: 500;
    color: var(--primary-teal);
    text-decoration: none;
    border-bottom: 1px dotted rgba(0, 191, 165, 0.5);
    transition: var(--transition-fast);
}
.dofollow-partner-link:hover {
    color: var(--background-white);
    border-bottom-color: var(--background-white);
}
.footer-credit a {
    color: var(--background-white);
    font-weight: 600;
}
.footer-credit a:hover {
    text-decoration: underline;
    color: var(--primary-teal);
}
.footer-copyright {
    text-align: center;
    font-size: 0.85rem;
    padding-top: 20px;
}
@media (max-width: 1024px) {
    .main-navigation ul {
        gap: 0;
    }
    .main-navigation li a {
        padding: 15px;
        font-size: 0.95rem;
    }
    .cta-button {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
    .solutions-section .container,
    .platform-section .container,
    .knowledge-section .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .platform-section .container > div:first-child,
    .platform-section .container > div:last-child {
        order: 0;
    }
    #solutions p, #partners p, #knowledge p {
        text-align: center;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }
    .solutions-image-grid,
    .partners-image-showcase,
    .knowledge-image-layout {
        margin-top: 40px;
        height: 400px;
    }
    .alliance-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    .main-header {
        position: relative;
    }
    .main-header .container {
        flex-direction: column;
        height: auto;
        padding: 15px 0;
    }
    .main-navigation {
        width: 100%;
        overflow-x: auto;
        padding: 10px 0;
    }
    .main-navigation ul {
        justify-content: flex-start;
        padding: 0 20px;
    }
    .main-navigation li a {
        white-space: nowrap;
    }
    .submenu {
        display: none;
    }
    .has-submenu:hover > .submenu {
        display: none;
    }
    .cta-button {
        display: none;
    }
    .section-title {
        font-size: 2.2rem;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-image-gallery {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
    .hero-image-gallery img {
        height: 120px;
    }
    .solutions-image-grid,
    .partners-image-showcase,
    .knowledge-image-layout {
        height: 350px;
    }
    .partners-image-showcase img {
        width: 180px;
    }
    .partner-list {
        columns: 1;
    }
    .alliance-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .alliance-item {
        padding: 25px;
    }
}
@media (max-width: 480px) {
    section {
        padding: 60px 0;
    }
    .hero-section {
        padding: 60px 0;
    }
    .hero-title {
        font-size: 2rem;
    }
    .hero-content p {
        font-size: 1rem;
    }
    .partner-contact-notice {
        font-size: 0.85rem;
    }
    .hero-image-gallery,
    .solutions-image-grid,
    .partners-image-showcase,
    .knowledge-image-layout {
        display: none;
    }
    .alliance-item h3 {
        font-size: 1.05rem;
    }
    .alliance-item p {
        font-size: 0.9rem;
    }
}