@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #0ea5e9;
    --accent-hover: #0284c7;
    --accent-gradient: linear-gradient(135deg, #0ea5e9 0%, #2563eb 100%);
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --card-shadow: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
    --card-shadow-hover: 0 20px 40px -15px rgba(14, 165, 233, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", PingFang SC, "Microsoft YaHei", sans-serif;
    background-color: var(--bg-light);
    color: var(--text-secondary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* Common Layout Utilities */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}

/* Glass Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
}

header.scrolled {
    background: rgba(15, 23, 42, 0.95);
    padding: 5px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 76px;
}

.logo img {
    height: 32px;
    transition: var(--transition);
}

.logo img:hover {
    transform: scale(1.02);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 8px 0;
}

.nav-links a:not(.nav-login)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover {
    color: #fff;
}

.nav-links a:not(.nav-login):hover::after {
    width: 100%;
}

.nav-login {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff !important;
    padding: 8px 20px !important;
    border-radius: 50px;
}

.nav-login:hover {
    background: var(--accent-gradient) !important;
    border-color: transparent !important;
}

/* Mobile Nav Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    background: none;
    border: none;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    transition: var(--transition);
}

/* Banner / Hero Section */
.hero-slider {
    position: relative;
    height: 100vh;
    min-height: 650px;
    width: 100%;
    overflow: hidden;
    background: var(--primary);
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), visibility 1s;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.4) 100%);
    z-index: 1;
}

.slide-content {
    position: relative;
    z-index: 2;
    color: #fff;
    max-width: 800px;
    padding: 0 24px;
    transform: translateY(30px);
    opacity: 0;
    transition: transform 0.8s ease 0.5s, opacity 0.8s ease 0.5s;
}

.slide.active .slide-content {
    transform: translateY(0);
    opacity: 1;
}

.slide-content h2 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.slide-content p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 36px;
    max-width: 600px;
}

/* Slider Controls */
.slider-nav {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background: var(--accent);
    transform: scale(1.2);
}

/* About Section */
.about-section {
    background: var(--bg-white);
}

.section-title-wrapper {
    margin-bottom: 60px;
}

.section-subtitle {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
    display: block;
}

.section-title {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2rem, 3.5vw, 2.75rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.25;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h3 {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.4;
}

.about-content p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.stat-card {
    background: var(--bg-light);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid rgba(15, 23, 42, 0.03);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow);
}

.stat-number {
    font-family: 'Outfit', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Service Pillars Section */
.services-section {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 50px;
}

.service-card {
    background: var(--bg-white);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    border: 1px solid rgba(15, 23, 42, 0.04);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-shadow-hover);
}

.service-img {
    height: 280px;
    overflow: hidden;
    position: relative;
}

.service-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.service-card:hover .service-img img {
    transform: scale(1.08);
}

.service-img-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent, rgba(15, 23, 42, 0.8));
    z-index: 1;
}

.service-info {
    padding: 40px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.service-info h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.service-info p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.learn-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--accent);
}

.learn-more span {
    transition: var(--transition);
}

.service-card:hover .learn-more span {
    transform: translateX(4px);
}

/* Member Units Section */
.members-section {
    background: var(--bg-white);
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.member-card {
    background: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(15, 23, 42, 0.04);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.01);
    transition: var(--transition);
    position: relative;
}

.member-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(14, 165, 233, 0.15);
}

.member-img-wrapper {
    position: relative;
    height: 190px;
    overflow: hidden;
    background: var(--primary);
}

.member-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.member-card:hover .member-img-wrapper img {
    transform: scale(1.06);
    opacity: 0.85;
}

.member-meta {
    padding: 24px;
}

.member-meta h4 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 700;
}

.member-meta p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.member-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    transition: var(--transition);
    z-index: 5;
    padding: 30px;
    text-align: center;
    color: #fff;
}

.member-card:hover .member-link {
    opacity: 1;
}

.member-link-content {
    transform: translateY(15px);
    transition: var(--transition);
}

.member-card:hover .member-link-content {
    transform: translateY(0);
}

.member-link-content h4 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #fff;
}

.member-link-content p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.member-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--accent-gradient);
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: 30px;
    box-shadow: 0 4px 10px rgba(14, 165, 233, 0.3);
}

/* Footer & Top Scroll */
footer {
    background: var(--primary);
    color: #fff;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-top {
    padding: 80px 0 60px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 60px;
}

.footer-info-col h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-info-col span {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    display: block;
    margin-bottom: 24px;
}

.footer-col-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 8px;
}

.footer-col-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent);
}

.footer-links-list li {
    margin-bottom: 12px;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    flex-direction: column;
}

.footer-links-list li strong {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.75rem;
    text-transform: uppercase;
    margin-bottom: 2px;
    letter-spacing: 0.05em;
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.2);
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom-flex a:hover {
    color: var(--accent);
}

/* Back to Top button */
.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--accent-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
}

/* RESPONSIVENESS */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .members-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    .footer-info-col {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .nav-container {
        height: 58px;
    }
    .logo img {
        height: 24px;
    }
    .section-padding {
        padding: 70px 0;
    }
    .services-grid {
        grid-template-columns: 1fr;
    }
    .members-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin-left: auto;
        margin-right: auto;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .footer-info-col {
        grid-column: span 1;
    }
    .footer-bottom-flex {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    /* Mobile Nav Overlay */
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 58px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 58px);
        background: var(--primary);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 40px;
        transition: var(--transition);
        z-index: 999;
    }

    .nav-links.active {
        left: 0;
    }
    
    .nav-links a {
        font-size: 1.2rem;
    }
}