/* ===== CSS Variables & Reset ===== */
:root {
    --color-primary: #2d7a5f;
    --color-primary-light: #4a9d7f;
    --color-primary-dark: #1a5640;
    --color-accent: #d4a853;
    --color-accent-light: #f0d78c;
    --color-bg: #faf8f3;
    --color-bg-dark: #1a1a2e;
    --color-text: #2d2d3a;
    --color-text-light: #6b7280;
    --color-white: #ffffff;
    --color-border: #e8e4d8;
    --gradient-primary: linear-gradient(135deg, #2d7a5f 0%, #4a9d7f 100%);
    --gradient-hero: linear-gradient(135deg, #1a5640 0%, #2d7a5f 40%, #3a9070 100%);
    --gradient-gold: linear-gradient(135deg, #d4a853 0%, #f0d78c 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Noto Serif SC', Georgia, serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.8;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Typography ===== */
.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    text-align: center;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--color-primary);
    text-transform: uppercase;
    margin-bottom: 12px;
    text-align: center;
    width: 100%;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: 0 4px 16px rgba(45, 122, 95, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(45, 122, 95, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--color-primary-dark);
    text-decoration: none;
}

.logo-icon {
    font-size: 1.6rem;
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-light);
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.language-switcher {
    display: flex;
    gap: 4px;
    background: rgba(45, 122, 95, 0.08);
    border-radius: 20px;
    padding: 3px;
}

.lang-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    background: transparent;
    color: var(--color-text-light);
    transition: var(--transition);
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-toggle span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: 72px;
}

.hero-bg-animation {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(212, 168, 83, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(74, 157, 127, 0.2) 0%, transparent 50%);
    animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% { opacity: 0.6; }
    100% { opacity: 1; }
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: var(--color-white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    padding: 8px 20px;
    font-size: 0.85rem;
    margin-bottom: 28px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.text-gradient {
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    line-height: 1.9;
    opacity: 0.9;
    margin-bottom: 36px;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: clamp(24px, 5vw, 64px);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 800;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.85rem;
    opacity: 0.8;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid rgba(255,255,255,0.6);
    border-bottom: 2px solid rgba(255,255,255,0.6);
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.6; }
    50% { transform: rotate(45deg) translateY(8px); opacity: 1; }
}

/* ===== Section Base ===== */
.section {
    padding: clamp(60px, 10vw, 100px) 0;
}

.section-overview {
    background: var(--color-white);
}

/* ===== Overview Grid ===== */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
}

.overview-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.overview-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.overview-card.main-card {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(45, 122, 95, 0.03) 0%, rgba(212, 168, 83, 0.05) 100%);
    border-color: rgba(45, 122, 95, 0.15);
}

.card-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.overview-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-primary-dark);
}

.overview-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.8;
}

.advantage-list {
    list-style: none;
    padding: 0;
}

.advantage-list li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--color-text-light);
    font-size: 0.92rem;
    line-height: 1.7;
}

.advantage-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* ===== Features Section ===== */
.section-features {
    background: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.feature-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    color: rgba(45, 122, 95, 0.08);
    position: absolute;
    top: 16px;
    right: 24px;
    line-height: 1;
}

.feature-icon {
    font-size: 2.4rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-primary-dark);
    position: relative;
}

.feature-card p {
    color: var(--color-text-light);
    font-size: 0.92rem;
    line-height: 1.8;
    position: relative;
}

/* ===== Application Section ===== */
.section-application {
    background: var(--color-white);
}

.application-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.eco-system {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    max-width: 440px;
    margin: 0 auto;
}

.eco-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    box-shadow: var(--shadow-lg);
    z-index: 2;
    text-align: center;
}

.eco-center span {
    font-size: 2rem;
}

.eco-center p {
    font-size: 0.7rem;
    margin-top: 4px;
    line-height: 1.3;
    font-weight: 600;
}

.eco-node {
    position: absolute;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: var(--color-white);
    border: 2px solid var(--color-primary-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    text-align: center;
    animation: nodeFloat 3s ease-in-out infinite alternate;
}

.eco-node span {
    font-size: 1.4rem;
}

.eco-node p {
    font-size: 0.6rem;
    line-height: 1.2;
    margin-top: 2px;
    color: var(--color-text-light);
}

.eco-node-1 { top: 0; left: 50%; transform: translateX(-50%); animation-delay: 0s; }
.eco-node-2 { top: 25%; right: 0; animation-delay: 0.5s; }
.eco-node-3 { bottom: 25%; right: 0; animation-delay: 1s; }
.eco-node-4 { bottom: 0; left: 50%; transform: translateX(-50%); animation-delay: 1.5s; }
.eco-node-5 { bottom: 25%; left: 0; animation-delay: 0.8s; }
.eco-node-6 { top: 25%; left: 0; animation-delay: 0.3s; }

@keyframes nodeFloat {
    0% { transform: translateY(0); }
    100% { transform: translateY(-6px); }
}

.eco-node-1:not(.eco-center),
.eco-node-2:not(.eco-center),
.eco-node-3:not(.eco-center),
.eco-node-4:not(.eco-center),
.eco-node-5:not(.eco-center),
.eco-node-6:not(.eco-center) {
    /* override transform for positioned nodes */
}

.application-desc {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: 32px;
}

.application-highlights {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.highlight-icon {
    font-size: 1.6rem;
    flex-shrink: 0;
}

.highlight-item h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 2px;
}

.highlight-item p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* ===== Business Section ===== */
.section-business {
    background: linear-gradient(180deg, var(--color-bg) 0%, rgba(45, 122, 95, 0.02) 100%);
}

.business-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 56px;
    flex-wrap: wrap;
}

.flow-step {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    text-align: center;
    min-width: 220px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.flow-step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.flow-icon {
    font-size: 2.4rem;
    margin-bottom: 12px;
}

.flow-step h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.flow-step p {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.flow-arrow {
    font-size: 1.8rem;
    color: var(--color-primary);
    font-weight: 700;
}

.business-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.biz-stat {
    text-align: center;
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    border: 1px solid var(--color-border);
}

.biz-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.biz-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* ===== Direction Section ===== */
.section-direction {
    background: var(--color-white);
}

.direction-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 28px;
    margin-bottom: 56px;
}

.direction-card {
    border-radius: var(--radius-xl);
    padding: 40px 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.direction-card.domestic {
    background: linear-gradient(135deg, rgba(45, 122, 95, 0.06) 0%, rgba(45, 122, 95, 0.02) 100%);
    border: 1px solid rgba(45, 122, 95, 0.15);
}

.direction-card.global {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.06) 0%, rgba(59, 130, 246, 0.02) 100%);
    border: 1px solid rgba(59, 130, 246, 0.15);
}

.direction-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.direction-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.direction-icon {
    font-size: 2rem;
}

.direction-card h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
}

.direction-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.direction-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 500;
    background: rgba(45, 122, 95, 0.08);
    color: var(--color-primary-dark);
    border: 1px solid rgba(45, 122, 95, 0.15);
}

.partners-section {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
}

.partners-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 36px;
    color: var(--color-primary-dark);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.partner-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.partner-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.partner-icon {
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.partner-card h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.partner-card p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ===== CTA Section ===== */
.section-cta {
    background: var(--gradient-hero);
    color: var(--color-white);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 32px;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.contact-info {
    display: flex;
    justify-content: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    padding: 10px 24px;
    backdrop-filter: blur(4px);
}

.contact-item a {
    color: var(--color-white);
    font-weight: 500;
}

/* ===== Footer ===== */
.footer {
    background: #16241e;
    color: rgba(255,255,255,0.7);
    padding: 56px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--color-white);
    margin-bottom: 12px;
}

.footer-desc {
    font-size: 0.88rem;
    line-height: 1.7;
    opacity: 0.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 12px;
}

.footer-col a {
    display: block;
    font-size: 0.88rem;
    color: rgba(255,255,255,0.55);
    margin-bottom: 8px;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.82rem;
    opacity: 0.5;
    margin-bottom: 8px;
}

.footer-disclaimer {
    font-size: 0.75rem !important;
    opacity: 0.4 !important;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .application-layout {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: var(--transition);
        visibility: hidden;
    }

    .nav-menu.active {
        transform: translateY(0);
        visibility: visible;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .business-flow {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 600px) {
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        gap: 20px;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

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

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