:root {
    --bg: #f0f4f8;
    --bg-gradient: linear-gradient(135deg, #f0f4f8 0%, #e8eef5 100%);
    --surface: #ffffff;
    --surface-glass: rgba(255, 255, 255, 0.72);
    --surface-glass-hover: rgba(255, 255, 255, 0.88);
    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border: rgba(226, 232, 240, 0.8);
    --border-glass: rgba(255, 255, 255, 0.5);
    --primary: #0b1a2f;
    --accent: #e11d48;
    --accent-hover: #be123c;
    --accent-glow: rgba(225, 29, 72, 0.35);
    --accent-soft: rgba(225, 29, 72, 0.08);
    --gradient-hero: linear-gradient(135deg, #0b1a2f 0%, #1e3a5f 40%, #e11d48 100%);
    --gradient-card: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.6) 100%);
    --gradient-accent: linear-gradient(135deg, #e11d48 0%, #f43f5e 50%, #fb7185 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 8px 32px rgba(225, 29, 72, 0.25);
    --radius-sm: 8px;
    --radius: 16px;
    --radius-lg: 24px;
    --radius-pill: 999px;
    --header-height: 68px;
    --blur: 20px;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg: #060b14;
    --bg-gradient: linear-gradient(135deg, #060b14 0%, #0b1120 100%);
    --surface: #0f172a;
    --surface-glass: rgba(15, 23, 42, 0.72);
    --surface-glass-hover: rgba(15, 23, 42, 0.88);
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(30, 41, 59, 0.8);
    --border-glass: rgba(255, 255, 255, 0.08);
    --primary: #f1f5f9;
    --accent: #f43f5e;
    --accent-hover: #fb7185;
    --accent-glow: rgba(244, 63, 94, 0.3);
    --accent-soft: rgba(244, 63, 94, 0.1);
    --gradient-hero: linear-gradient(135deg, #060b14 0%, #1a1040 40%, #be123c 100%);
    --gradient-card: linear-gradient(135deg, rgba(15,23,42,0.9) 0%, rgba(15,23,42,0.6) 100%);
    --gradient-accent: linear-gradient(135deg, #f43f5e 0%, #fb7185 50%, #fda4af 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 8px 32px rgba(244, 63, 94, 0.2);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    background-image: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text);
    line-height: 1.75;
    font-size: 16px;
    transition: background var(--transition), color var(--transition);
    padding-top: var(--header-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

::selection {
    background: var(--accent);
    color: #fff;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: var(--radius-pill);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--surface-glass);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    border-bottom: 1px solid var(--border-glass);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.header-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--text);
    letter-spacing: 0.5px;
    white-space: nowrap;
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.03);
    color: var(--text);
}

.logo svg {
    width: 34px;
    height: 34px;
    filter: drop-shadow(0 2px 8px var(--accent-glow));
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    border-radius: var(--radius-pill);
    transition: width var(--transition), left var(--transition);
}

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

.nav-links a:hover::after {
    width: 100%;
    left: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-box {
    display: flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    padding: 4px 6px 4px 16px;
    background: var(--surface-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.search-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
    background: var(--surface-glass-hover);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    color: var(--text);
    font-size: 0.88rem;
    width: 130px;
    font-family: inherit;
}

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

.search-box button {
    border: none;
    background: var(--gradient-accent);
    color: #fff;
    border-radius: var(--radius-pill);
    padding: 6px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.search-box button:hover {
    opacity: 0.9;
    transform: scale(1.04);
    box-shadow: 0 2px 12px var(--accent-glow);
}

.theme-toggle {
    background: var(--surface-glass);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: rotate(45deg) scale(1.08);
    box-shadow: 0 0 0 3px var(--accent-soft);
    background: var(--surface-glass-hover);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text);
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-menu-btn:hover {
    background: var(--accent-soft);
    color: var(--accent);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--surface-glass);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    border-bottom: 1px solid var(--border-glass);
    padding: 16px 24px;
    flex-direction: column;
    gap: 0;
    z-index: 999;
    box-shadow: var(--shadow);
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@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;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    transition: color var(--transition-fast), padding-left var(--transition-fast);
}

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

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

.breadcrumb {
    max-width: 1180px;
    margin: 0 auto;
    padding: 20px 24px 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
}

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

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

.breadcrumb span {
    margin: 0 4px;
    color: var(--text-muted);
}

.hero {
    padding: 48px 0 32px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-soft) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
    color: var(--text);
    letter-spacing: -0.02em;
}

.hero h1 em {
    font-style: normal;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 28px;
    max-width: 560px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #fff;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--accent-glow);
    filter: brightness(1.08);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    background: var(--surface-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--accent-soft);
    background: var(--surface-glass-hover);
}

.banner-carousel {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--surface);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-glass);
}

.banner-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-slide.active {
    opacity: 1;
}

.banner-slide svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-indicators {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 2;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius-pill);
}

.banner-indicators button {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.45);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
}

.banner-indicators button.active {
    background: #fff;
    width: 24px;
    border-radius: var(--radius-pill);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

.banner-indicators button:hover {
    background: rgba(255, 255, 255, 0.8);
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin: 48px 0;
}

.stat-card {
    background: var(--surface-glass);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 32px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition);
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 8px;
    font-weight: 500;
}

.section {
    padding: 56px 0;
    position: relative;
}

.section-title {
    font-size: 1.7rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--text);
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 48px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: var(--radius-pill);
}

.section-subtitle {
    color: var(--text-secondary);
    margin-bottom: 36px;
    font-size: 0.98rem;
    margin-top: 16px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: var(--surface-glass);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 32px 28px;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    position: relative;
    overflow: hidden;
}

.card::after {
    content: "";
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--accent-soft) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
    background: var(--surface-glass-hover);
}

.card:hover::after {
    opacity: 1;
}

.card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
    position: relative;
    z-index: 1;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

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

.article-card {
    background: var(--surface-glass);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.article-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--gradient-accent);
    border-radius: var(--radius-pill);
    transition: height var(--transition);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.article-card:hover::before {
    height: 100%;
}

.article-card .meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.article-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.5;
}

.article-card h3 a {
    color: var(--text);
    transition: color var(--transition-fast);
}

.article-card h3 a:hover {
    color: var(--accent);
}

.article-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
    flex: 1;
}

.article-card .read-more {
    font-size: 0.88rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--transition-fast), color var(--transition-fast);
    margin-top: auto;
}

.article-card .read-more:hover {
    gap: 8px;
    color: var(--accent-hover);
}

.faq-item {
    background: var(--surface-glass);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    margin-bottom: 14px;
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.faq-item.open {
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 20px 28px;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-family: inherit;
    transition: color var(--transition-fast);
    line-height: 1.5;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question::after {
    content: "+";
    font-size: 1.4rem;
    color: var(--accent);
    transition: transform var(--transition);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--accent-soft);
    line-height: 1;
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
    background: var(--accent);
    color: #fff;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0 28px;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    max-height: 500px;
    padding: 0 28px 24px;
}

.howto-steps {
    display: grid;
    gap: 20px;
}

.howto-step {
    background: var(--surface-glass);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.howto-step:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}

.step-num {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 4px 16px var(--accent-glow);
    transition: transform var(--transition);
}

.howto-step:hover .step-num {
    transform: scale(1.1) rotate(-5deg);
}

.howto-step h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text);
}

.howto-step p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.author-box {
    background: var(--surface-glass);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    gap: 24px;
    align-items: center;
    margin-top: 32px;
    transition: box-shadow var(--transition), border-color var(--transition);
}

.author-box:hover {
    box-shadow: var(--shadow);
    border-color: var(--accent);
}

.author-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: 0 4px 16px var(--accent-glow);
    border: 2px solid var(--accent);
    transition: transform var(--transition);
}

.author-box:hover .author-avatar {
    transform: scale(1.05);
}

.author-info h4 {
    font-size: 1rem;
    margin-bottom: 6px;
    color: var(--text);
    font-weight: 700;
}

.author-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.site-footer {
    background: var(--primary);
    color: #cbd5e1;
    padding: 56px 0 28px;
    margin-top: 56px;
    transition: background var(--transition);
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
}

[data-theme="dark"] .site-footer {
    background: #060b14;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 36px;
    margin-bottom: 36px;
}

.footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    margin-bottom: 16px;
    font-weight: 700;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 28px;
    height: 2px;
    background: var(--gradient-accent);
    border-radius: var(--radius-pill);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: #94a3b8;
    font-size: 0.85rem;
    transition: color var(--transition-fast), padding-left var(--transition-fast);
    display: inline-block;
}

.footer-col ul li a:hover {
    color: #fff;
    padding-left: 6px;
}

.footer-col address {
    font-style: normal;
    font-size: 0.85rem;
    line-height: 2;
    color: #94a3b8;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 24px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.8rem;
    color: #64748b;
}

.footer-bottom a {
    color: #94a3b8;
    transition: color var(--transition-fast);
}

.footer-bottom a:hover {
    color: #fff;
}

.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px var(--accent-glow);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition), transform var(--transition), box-shadow var(--transition);
    z-index: 900;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 8px 32px var(--accent-glow);
    filter: brightness(1.1);
}

.back-to-top:active {
    transform: translateY(-2px) scale(1.02);
}

.reveal {
    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);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal:nth-child(2) {
    transition-delay: 0.08s;
}

.reveal:nth-child(3) {
    transition-delay: 0.16s;
}

.reveal:nth-child(4) {
    transition-delay: 0.24s;
}

.reveal:nth-child(5) {
    transition-delay: 0.32s;
}

.reveal:nth-child(6) {
    transition-delay: 0.4s;
}

@media (max-width: 1024px) {
    .hero-grid {
        gap: 36px;
    }
    .hero h1 {
        font-size: 2.1rem;
    }
    .stats-row {
        gap: 18px;
    }
    .stat-number {
        font-size: 1.9rem;
    }
}

@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 1.9rem;
    }
    .hero p {
        max-width: 100%;
    }
    .stats-row {
        grid-template-columns: repeat(2, 1fr);
    }
    .nav-links {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .search-box input {
        width: 90px;
    }
    .section {
        padding: 44px 0;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .footer-grid {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 28px;
    }
    .howto-step {
        padding: 24px;
        gap: 18px;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }
    .header-inner {
        padding: 0 16px;
    }
    .hero {
        padding: 32px 0 24px;
    }
    .hero h1 {
        font-size: 1.55rem;
    }
    .hero p {
        font-size: 0.95rem;
    }
    .hero-actions {
        gap: 10px;
    }
    .btn {
        padding: 11px 22px;
        font-size: 0.9rem;
        flex: 1;
        min-width: 140px;
    }
    .search-box {
        display: none;
    }
    .stat-number {
        font-size: 1.7rem;
    }
    .stat-card {
        padding: 24px 16px;
    }
    .section-title {
        font-size: 1.35rem;
    }
    .section-subtitle {
        font-size: 0.9rem;
        margin-bottom: 28px;
    }
    .card-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }
    .card {
        padding: 24px 22px;
    }
    .article-list {
        grid-template-columns: 1fr;
        gap: 18px;
    }
    .article-card {
        padding: 24px 22px;
    }
    .faq-question {
        padding: 16px 20px;
        font-size: 0.95rem;
    }
    .faq-answer {
        padding: 0 20px;
    }
    .faq-item.open .faq-answer {
        padding: 0 20px 20px;
    }
    .author-box {
        flex-direction: column;
        text-align: center;
        padding: 24px 20px;
    }
    .author-avatar {
        width: 64px;
        height: 64px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
    .breadcrumb {
        padding: 16px 16px 0;
        font-size: 0.8rem;
    }
    .howto-step {
        flex-direction: column;
        gap: 14px;
        padding: 22px;
    }
    .step-num {
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }
}

@media (max-width: 400px) {
    .hero h1 {
        font-size: 1.35rem;
    }
    .stats-row {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .btn {
        width: 100%;
    }
}

@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;
    }
    .reveal {
        opacity: 1;
        transform: none;
    }
}

@supports not (backdrop-filter: blur(10px)) {
    .site-header,
    .mobile-nav,
    .search-box,
    .stat-card,
    .card,
    .article-card,
    .faq-item,
    .howto-step,
    .author-box {
        background: var(--surface);
    }
}