:root {
    --bg-primary: #f6f8fb;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eef2f8;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --brand-green: #1a7f4b;
    --brand-green-light: #2e9e5e;
    --brand-gold: #c49a3c;
    --brand-dark: #0b1a2f;
    --brand-cyan: #38bdf8;
    --brand-purple: #7c3aed;
    --border-color: #e2e8f0;
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.35);
    --glass-shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.14);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-xl: 30px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 80px;
}

body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background-color 0.35s ease, color 0.35s ease;
}

body.dark-mode {
    --bg-primary: #070d1a;
    --bg-secondary: #0f172a;
    --bg-tertiary: #1a2540;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #8fa3bd;
    --border-color: rgba(148, 163, 184, 0.16);
    --glass-bg: rgba(15, 23, 42, 0.72);
    --glass-border: rgba(148, 163, 184, 0.14);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.7);
}

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

a:hover {
    color: var(--brand-green-light);
}

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

::selection {
    background-color: rgba(26, 127, 75, 0.22);
    color: var(--text-primary);
}

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

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--glass-bg);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: background-color 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text-primary);
    letter-spacing: 0.4px;
    white-space: nowrap;
    transition: transform var(--transition-bounce);
}

.nav-brand:hover {
    transform: scale(1.03);
    color: var(--text-primary);
}

.nav-brand svg {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    transition: transform var(--transition-bounce);
}

.nav-brand:hover svg {
    transform: rotate(-6deg) scale(1.08);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 26px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.94rem;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    white-space: nowrap;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--brand-green), var(--brand-cyan));
    transition: width var(--transition);
}

.nav-links a:hover {
    color: var(--brand-green);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition);
    flex-shrink: 0;
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--brand-green);
    transform: rotate(18deg) scale(1.06);
    border-color: var(--brand-green);
}

.theme-toggle:active {
    transform: rotate(18deg) scale(0.94);
}

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition);
}

.mobile-menu-btn:hover {
    background-color: var(--bg-tertiary);
}

.search-box {
    display: flex;
    align-items: center;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    transition: border-color var(--transition), box-shadow var(--transition), background-color 0.35s ease;
}

.search-box:focus-within {
    border-color: var(--brand-green);
    box-shadow: 0 0 0 3px rgba(26, 127, 75, 0.12);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.9rem;
    color: var(--text-primary);
    width: 140px;
    font-family: inherit;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box button {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    transition: color var(--transition), transform var(--transition);
}

.search-box button:hover {
    color: var(--brand-green);
    transform: scale(1.12);
}

.breadcrumb {
    padding: 18px 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 6px;
}

.breadcrumb li:not(:last-child)::after {
    content: '/';
    color: var(--text-muted);
    margin-left: 6px;
    opacity: 0.6;
}

.breadcrumb a {
    color: var(--text-muted);
}

.breadcrumb a:hover {
    color: var(--brand-green);
}

.hero {
    background: linear-gradient(135deg, #0b1a2f 0%, #12315c 45%, #1a4d6e 100%);
    color: #ffffff;
    padding: 88px 0 80px;
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.hero::before {
    content: '';
    position: absolute;
    top: -45%;
    right: -8%;
    width: 620px;
    height: 620px;
    background: radial-gradient(circle, rgba(26, 127, 75, 0.28) 0%, transparent 68%);
    border-radius: 50%;
    pointer-events: none;
    animation: floatGlow 9s ease-in-out infinite alternate;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -6%;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, rgba(196, 154, 60, 0.18) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    animation: floatGlow 11s ease-in-out infinite alternate-reverse;
}

@keyframes floatGlow {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 0.7;
    }
    100% {
        transform: translate(-30px, 30px) scale(1.12);
        opacity: 1;
    }
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 2.6rem;
    font-weight: 800;
    line-height: 1.28;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
}

.hero-content h1 span {
    background: linear-gradient(120deg, #c49a3c 0%, #f0c96a 50%, #c49a3c 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: var(--brand-gold);
}

.hero-content p {
    font-size: 1.05rem;
    color: rgba(226, 232, 240, 0.9);
    margin-bottom: 30px;
    line-height: 1.85;
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 30px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-bounce);
    border: none;
    font-family: inherit;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn svg {
    transition: transform var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--brand-green) 0%, var(--brand-green-light) 100%);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(26, 127, 75, 0.32);
}

.btn-primary:hover {
    color: #ffffff;
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 30px rgba(26, 127, 75, 0.45);
}

.btn-primary:hover svg {
    transform: translateX(4px);
}

.btn-primary:active {
    transform: translateY(-1px) scale(0.99);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.06);
    color: #ffffff;
    border: 1.5px solid rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.btn-outline:hover {
    border-color: #ffffff;
    background: rgba(255, 255, 255, 0.14);
    color: #ffffff;
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.25);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-visual svg {
    width: 100%;
    max-width: 460px;
    filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.4));
    animation: heroFloat 6s ease-in-out infinite;
}

@keyframes heroFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-14px);
    }
}

.stats-section {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 44px 0;
    transition: background-color 0.35s ease, border-color 0.35s ease;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 10px 8px;
    border-radius: var(--radius-md);
    transition: transform var(--transition-bounce), background-color var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    background-color: var(--bg-tertiary);
}

.stat-item .stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--brand-green) 0%, var(--brand-cyan) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: var(--brand-green);
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.stat-item .stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.section {
    padding: 76px 0;
    transition: background-color 0.35s ease;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 1.85rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-primary);
    letter-spacing: -0.3px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -10px;
    transform: translateX(-50%);
    width: 48px;
    height: 3px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--brand-green), var(--brand-gold));
}

.section-header p {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 640px;
    margin: 18px auto 0;
    line-height: 1.75;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 34px 28px;
    transition: transform var(--transition-bounce), box-shadow var(--transition), border-color var(--transition), background-color 0.35s ease;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--brand-green), var(--brand-cyan), var(--brand-gold));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(26, 127, 75, 0.4);
}

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

.card-icon {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(26, 127, 75, 0.14), rgba(56, 189, 248, 0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--brand-green);
    transition: transform var(--transition-bounce), background var(--transition);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(-4deg);
    background: linear-gradient(135deg, rgba(26, 127, 75, 0.24), rgba(56, 189, 248, 0.16));
}

.card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
    line-height: 1.5;
}

.card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.78;
}

.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.article-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px 26px;
    transition: transform var(--transition-bounce), box-shadow var(--transition), border-color var(--transition), background-color 0.35s ease;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.article-item::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--brand-green), var(--brand-cyan));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition);
}

.article-item:hover {
    transform: translateY(-5px);
    border-color: rgba(26, 127, 75, 0.4);
    box-shadow: var(--shadow-lg);
}

.article-item:hover::after {
    transform: scaleY(1);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.article-meta span:first-child::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--brand-green);
    margin-right: 8px;
    vertical-align: middle;
}

.article-item h3 {
    font-size: 1.08rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
    line-height: 1.55;
    transition: color var(--transition);
}

.article-item:hover h3 {
    color: var(--brand-green);
}

.article-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.75;
    flex: 1;
    margin-bottom: 16px;
}

.article-link {
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--brand-green);
    transition: gap var(--transition), color var(--transition);
    align-self: flex-start;
}

.article-link:hover {
    gap: 12px;
    color: var(--brand-green-light);
}

.faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition), background-color 0.35s ease;
}

.faq-item:hover {
    border-color: rgba(26, 127, 75, 0.35);
}

.faq-item.active {
    border-color: var(--brand-green);
    box-shadow: 0 6px 22px rgba(26, 127, 75, 0.12);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    font-family: inherit;
    gap: 16px;
    transition: background-color var(--transition), color var(--transition);
}

.faq-question:hover {
    background-color: var(--bg-tertiary);
    color: var(--brand-green);
}

.faq-question .faq-icon {
    flex-shrink: 0;
    transition: transform var(--transition);
    color: var(--brand-green);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 24px;
}

.faq-item.active .faq-answer {
    max-height: 600px;
    padding: 0 24px 22px;
}

.faq-answer p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.85;
}

.howto-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px 24px;
    counter-reset: step;
}

.howto-step {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px 24px 26px;
    position: relative;
    counter-increment: step;
    transition: transform var(--transition-bounce), box-shadow var(--transition), border-color var(--transition), background-color 0.35s ease;
    box-shadow: var(--shadow-sm);
}

.howto-step:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(26, 127, 75, 0.4);
}

.howto-step::before {
    content: counter(step);
    position: absolute;
    top: -16px;
    left: 24px;
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, var(--brand-green), var(--brand-green-light));
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.92rem;
    box-shadow: 0 4px 14px rgba(26, 127, 75, 0.35);
    transition: transform var(--transition-bounce);
}

.howto-step:hover::before {
    transform: scale(1.12) rotate(8deg);
}

.howto-step h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    margin-top: 8px;
    color: var(--text-primary);
}

.howto-step p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.75;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.contact-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px 24px;
    text-align: center;
    transition: transform var(--transition-bounce), box-shadow var(--transition), border-color var(--transition), background-color 0.35s ease;
    box-shadow: var(--shadow-sm);
}

.contact-item:hover {
    transform: translateY(-6px);
    border-color: rgba(26, 127, 75, 0.45);
    box-shadow: var(--shadow-lg);
}

.contact-item svg {
    margin: 0 auto 14px;
    color: var(--brand-green);
    transition: transform var(--transition-bounce);
}

.contact-item:hover svg {
    transform: scale(1.15) translateY(-3px);
}

.contact-item h3 {
    font-size: 0.98rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.contact-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    word-break: break-word;
}

.footer {
    background: linear-gradient(160deg, #0b1a2f 0%, #0f2440 100%);
    color: #94a3b8;
    padding: 60px 0 28px;
    font-size: 0.88rem;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, rgba(26, 127, 75, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

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

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

.footer-brand p {
    margin-top: 16px;
    line-height: 1.85;
    color: #94a3b8;
    max-width: 380px;
}

.footer h4 {
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}

.footer h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 26px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--brand-green), var(--brand-gold));
}

.footer ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 11px;
}

.footer ul a {
    color: #94a3b8;
    font-size: 0.88rem;
    transition: color var(--transition), padding-left var(--transition);
    display: inline-block;
}

.footer ul a:hover {
    color: var(--brand-gold);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 24px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    color: #64748b;
    font-size: 0.82rem;
}

.footer-bottom a {
    color: #64748b;
}

.footer-bottom a:hover {
    color: var(--brand-gold);
}

.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-green), var(--brand-green-light));
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px rgba(26, 127, 75, 0.45);
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px) scale(0.9);
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 12px 28px rgba(26, 127, 75, 0.55);
}

.back-to-top:active {
    transform: translateY(-1px) scale(0.98);
}

.fade-in {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background-color: var(--glass-bg);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 24px;
    z-index: 999;
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    gap: 4px;
    max-height: calc(100vh - 68px);
    overflow-y: auto;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-nav.open {
    display: flex;
}

.mobile-nav a {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    padding: 12px 4px;
    border-bottom: 1px solid var(--border-color);
    transition: color var(--transition), padding-left var(--transition);
}

.mobile-nav a:last-child {
    border-bottom: none;
}

.mobile-nav a:hover {
    color: var(--brand-green);
    padding-left: 8px;
}

@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 44px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-visual {
        order: -1;
    }

    .hero-visual svg {
        max-width: 320px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .nav-links {
        gap: 18px;
    }

    .nav-links a {
        font-size: 0.88rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    .search-box {
        display: none;
    }

    .hero {
        padding: 60px 0 56px;
    }

    .hero-content h1 {
        font-size: 1.7rem;
    }

    .hero-content p {
        font-size: 0.98rem;
    }

    .section {
        padding: 52px 0;
    }

    .section-header {
        margin-bottom: 38px;
    }

    .section-header h2 {
        font-size: 1.45rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }

    .howto-steps {
        gap: 28px 18px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 44px 0;
    }

    .hero-content h1 {
        font-size: 1.45rem;
    }

    .hero-cta {
        gap: 12px;
    }

    .btn {
        padding: 11px 22px;
        font-size: 0.9rem;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .stat-item .stat-number {
        font-size: 1.65rem;
    }

    .stat-item .stat-label {
        font-size: 0.82rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .article-list {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 26px 22px;
    }

    .article-item {
        padding: 24px 20px;
    }

    .faq-question {
        padding: 16px 18px;
        font-size: 0.92rem;
    }

    .faq-answer {
        padding: 0 18px;
    }

    .faq-item.active .faq-answer {
        padding: 0 18px 18px;
    }

    .howto-step {
        padding: 28px 20px 22px;
    }

    .contact-item {
        padding: 26px 20px;
    }

    .footer {
        padding: 48px 0 24px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .fade-in {
        opacity: 1;
        transform: none;
    }
}