:root {
    --color-primary: #140d13;
    --color-secondary: #231921;
    --color-accent: #ad6e88;
    --color-purple: #7b4498;
    --color-muted: #848c84;
    --color-text: #e8e0e6;
    --color-text-dim: #a89da5;
    --color-bg: #0e0a0d;
    --color-card: #1a1218;
    --color-border: #2e2430;
    --gradient-accent: linear-gradient(135deg, #ad6e88, #7b4498);
    --gradient-hero: linear-gradient(180deg, rgba(20,13,19,0) 0%, rgba(20,13,19,0.85) 60%, #140d13 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 70px;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== Header ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(14, 10, 13, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
    font-weight: 700;
    font-size: 1.1rem;
}

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

.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    color: var(--color-text-dim);
    font-size: 0.88rem;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.nav-active {
    color: var(--color-text);
    background: rgba(173, 110, 136, 0.12);
}

.nav-link.nav-active {
    color: var(--color-accent);
}

.nav-link i {
    margin-right: 4px;
    font-size: 0.82rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 8px;
}

/* ==================== Hero ==================== */
.hero {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: flex-end;
    padding-top: 64px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(123,68,152,0.25) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(173,110,136,0.18) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 10% 60%, rgba(123,68,152,0.12) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-secondary) 0%, var(--color-primary) 60%, var(--color-bg) 100%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(123,68,152,0.08) 0%, transparent 70%);
    filter: blur(40px);
    pointer-events: none;
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-particles span {
    position: absolute;
    display: block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: rgba(173,110,136,0.35);
    animation: particle-float linear infinite;
    pointer-events: none;
}

.hero-particles span:nth-child(1) { left: 10%; top: 30%; width: 3px; height: 3px; animation-duration: 8s; animation-delay: 0s; }
.hero-particles span:nth-child(2) { left: 25%; top: 60%; width: 5px; height: 5px; animation-duration: 12s; animation-delay: 1s; background: rgba(123,68,152,0.3); }
.hero-particles span:nth-child(3) { left: 45%; top: 20%; width: 3px; height: 3px; animation-duration: 10s; animation-delay: 2s; }
.hero-particles span:nth-child(4) { left: 65%; top: 50%; width: 6px; height: 6px; animation-duration: 14s; animation-delay: 0.5s; background: rgba(123,68,152,0.25); }
.hero-particles span:nth-child(5) { left: 80%; top: 35%; width: 4px; height: 4px; animation-duration: 9s; animation-delay: 3s; }
.hero-particles span:nth-child(6) { left: 15%; top: 75%; width: 5px; height: 5px; animation-duration: 11s; animation-delay: 1.5s; background: rgba(173,110,136,0.25); }
.hero-particles span:nth-child(7) { left: 55%; top: 70%; width: 3px; height: 3px; animation-duration: 13s; animation-delay: 2.5s; }
.hero-particles span:nth-child(8) { left: 90%; top: 55%; width: 4px; height: 4px; animation-duration: 10s; animation-delay: 0.8s; background: rgba(123,68,152,0.3); }
.hero-particles span:nth-child(9) { left: 35%; top: 40%; width: 3px; height: 3px; animation-duration: 15s; animation-delay: 4s; }
.hero-particles span:nth-child(10) { left: 72%; top: 15%; width: 5px; height: 5px; animation-duration: 11s; animation-delay: 1.8s; background: rgba(173,110,136,0.2); }

@keyframes particle-float {
    0% { transform: translateY(0) translateX(0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-120px) translateX(30px); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 44px 20px 40px;
    text-align: center;
}

.hero-title {
    font-size: 2.4rem;
    font-weight: 900;
    letter-spacing: 2px;
    margin-bottom: 2px;
    background: linear-gradient(135deg, #fff 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--color-accent);
    font-weight: 400;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.hero-desc {
    font-size: 0.95rem;
    color: var(--color-text-dim);
    max-width: 640px;
    margin: 0 auto 16px;
    line-height: 1.6;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 14px;
}

.meta-tag {
    background: rgba(35, 25, 33, 0.85);
    border: 1px solid var(--color-border);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.82rem;
    color: var(--color-text-dim);
    backdrop-filter: blur(6px);
}

.meta-tag i {
    margin-right: 4px;
    color: var(--color-accent);
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
}

.feature-badge {
    background: var(--gradient-accent);
    color: #fff;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.feature-badge i {
    margin-right: 4px;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-accent);
    color: #fff;
    padding: 12px 36px;
    border-radius: 30px;
    font-size: 1.05rem;
    font-weight: 700;
    box-shadow: 0 4px 24px rgba(123, 68, 152, 0.4);
    transition: all var(--transition);
}

.btn-download:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 32px rgba(123, 68, 152, 0.55);
}

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

/* ==================== Sections ==================== */
.section {
    padding: 60px 0;
}

.section:nth-child(even) {
    background: var(--color-primary);
}

.section-title {
    text-align: center;
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 36px;
    color: var(--color-text);
}

.section-title i {
    color: var(--color-accent);
    margin-right: 8px;
}

/* ==================== News ==================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.news-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--transition);
}

.news-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.news-date {
    font-size: 0.82rem;
    color: var(--color-muted);
    margin-bottom: 8px;
}

.news-date i {
    margin-right: 4px;
}

.news-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.news-excerpt {
    font-size: 0.88rem;
    color: var(--color-text-dim);
    line-height: 1.6;
    margin-bottom: 12px;
}

.news-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.news-link:hover {
    gap: 8px;
}

/* ==================== Gallery ==================== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 16 / 10;
}

.gallery-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.gallery-item:hover .gallery-img {
    transform: scale(1.08);
}

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: rgba(20, 13, 19, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
    color: #fff;
    font-size: 1.6rem;
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

/* ==================== Lightbox ==================== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

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

.lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: rgba(35, 25, 33, 0.7);
    border: 1px solid var(--color-border);
    color: #fff;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    z-index: 10;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.lightbox-close {
    top: 20px;
    right: 20px;
}

.lightbox-prev {
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.lightbox-next {
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

/* ==================== Reviews ==================== */
.reviews-summary {
    display: flex;
    align-items: center;
    gap: 32px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    margin-bottom: 32px;
}

.rating-score {
    text-align: center;
    min-width: 140px;
}

.score-number {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.score-stars {
    color: #f5a623;
    font-size: 1.1rem;
    margin: 4px 0;
}

.score-count {
    font-size: 0.82rem;
    color: var(--color-muted);
}

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

.rating-tag {
    background: rgba(173, 110, 136, 0.12);
    border: 1px solid rgba(173, 110, 136, 0.25);
    color: var(--color-accent);
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.82rem;
}

.rating-tag i {
    margin-right: 4px;
}

.reviews-carousel {
    overflow: hidden;
    position: relative;
}

.reviews-track {
    display: flex;
    gap: 20px;
    transition: transform 0.5s ease;
}

.review-card {
    flex: 0 0 calc(33.333% - 14px);
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--transition);
}

.review-card:hover {
    border-color: var(--color-accent);
}

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

.review-avatar {
    font-size: 2.2rem;
    color: var(--color-purple);
}

.review-name {
    font-weight: 600;
    font-size: 0.92rem;
}

.review-stars {
    color: #f5a623;
    font-size: 0.78rem;
}

.review-text {
    font-size: 0.88rem;
    color: var(--color-text-dim);
    line-height: 1.7;
}

.reviews-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 24px;
}

.carousel-btn {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.carousel-btn:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.carousel-dots {
    display: flex;
    gap: 8px;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-border);
    cursor: pointer;
    transition: all var(--transition);
}

.carousel-dot.active {
    background: var(--color-accent);
    width: 24px;
    border-radius: 4px;
}

/* ==================== Versions ==================== */
.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -32px;
    top: 8px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--gradient-accent);
    border: 3px solid var(--color-bg);
    z-index: 1;
}

.timeline-content {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
}

.version-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.version-tag {
    background: var(--gradient-accent);
    color: #fff;
    padding: 3px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.version-date {
    font-size: 0.85rem;
    color: var(--color-muted);
}

.version-date i {
    margin-right: 4px;
}

.version-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
}

.version-meta span {
    font-size: 0.82rem;
    color: var(--color-text-dim);
}

.version-meta i {
    margin-right: 4px;
    color: var(--color-accent);
}

.version-changes {
    list-style: none;
    margin-bottom: 14px;
}

.version-changes li {
    position: relative;
    padding-left: 18px;
    font-size: 0.88rem;
    color: var(--color-text-dim);
    margin-bottom: 4px;
}

.version-changes li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
}

.btn-sm {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(173, 110, 136, 0.15);
    border: 1px solid rgba(173, 110, 136, 0.3);
    color: var(--color-accent);
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 500;
    transition: all var(--transition);
}

.btn-sm:hover {
    background: var(--color-accent);
    color: #fff;
}

/* ==================== Guides ==================== */
.guides-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.filter-btn {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    color: var(--color-text-dim);
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-accent);
    border-color: transparent;
    color: #fff;
}

.guides-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.guide-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--transition);
}

.guide-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.guide-card.hidden {
    display: none;
}

.guide-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 14px;
}

.guide-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.guide-desc {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    line-height: 1.6;
    margin-bottom: 14px;
}

.guide-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--color-muted);
}

.guide-meta i {
    margin-right: 4px;
}

.guide-difficulty {
    color: var(--color-accent);
}

/* ==================== Chapters ==================== */
.chapters-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.chapter-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    position: relative;
    transition: all var(--transition);
}

.chapter-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.chapter-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--gradient-accent);
    color: #fff;
    padding: 2px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.chapter-badge.side {
    background: linear-gradient(135deg, var(--color-muted), #6a8a6a);
}

.chapter-number {
    font-size: 0.82rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 4px;
}

.chapter-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.chapter-desc {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    line-height: 1.6;
    margin-bottom: 14px;
}

.chapter-details {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.78rem;
    color: var(--color-muted);
}

.chapter-details i {
    margin-right: 4px;
    color: var(--color-accent);
}

/* ==================== FAQ ==================== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    overflow: hidden;
    transition: all var(--transition);
}

.faq-item:hover {
    border-color: rgba(173, 110, 136, 0.4);
}

.faq-question {
    width: 100%;
    background: var(--color-card);
    border: none;
    color: var(--color-text);
    padding: 18px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    font-family: inherit;
    transition: background var(--transition);
}

.faq-question:hover {
    background: rgba(173, 110, 136, 0.08);
}

.faq-icon {
    font-size: 0.85rem;
    color: var(--color-accent);
    transition: transform var(--transition);
    flex-shrink: 0;
}

.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;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 18px;
    font-size: 0.88rem;
    color: var(--color-text-dim);
    line-height: 1.7;
}

/* ==================== Footer ==================== */
.footer {
    background: var(--color-primary);
    border-top: 1px solid var(--color-border);
    padding: 48px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 36px;
}

.footer-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--color-text);
}

.footer-about {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    line-height: 1.6;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    transition: all var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.82rem;
    color: var(--color-muted);
}

.footer-legal {
    margin-top: 4px;
    font-size: 0.78rem !important;
    color: var(--color-border) !important;
}

/* ==================== Back to Top ==================== */
.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-accent);
    border: none;
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
    z-index: 900;
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .guides-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .review-card {
        flex: 0 0 calc(50% - 10px);
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(14, 10, 13, 0.97);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 12px 20px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-120%);
        opacity: 0;
        transition: all 0.35s ease;
        gap: 2px;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-link {
        padding: 10px 14px;
        font-size: 0.92rem;
    }

    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .hero {
        min-height: 380px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-meta {
        gap: 6px;
    }

    .meta-tag {
        padding: 3px 10px;
        font-size: 0.75rem;
    }

    .feature-badge {
        font-size: 0.72rem;
        padding: 3px 10px;
    }

    .section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 1.3rem;
        margin-bottom: 24px;
    }

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

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .reviews-summary {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }

    .review-card {
        flex: 0 0 calc(100% - 0px);
    }

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

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .timeline {
        padding-left: 24px;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 0.95rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-desc {
        font-size: 0.85rem;
    }

    .btn-download {
        padding: 10px 28px;
        font-size: 0.95rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

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

    .version-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
}