/* =============================================
   加速器下载官网 - 主样式文件
   符合Google/百度/必应SEO标准
   ============================================= */

/* CSS Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --secondary: #7c3aed;
    --accent: #f59e0b;
    --bg-dark: #050d1a;
    --bg-card: #0a1628;
    --bg-card2: #0d1f3c;
    --text-primary: #e8f4fd;
    --text-secondary: #8ba4c0;
    --text-muted: #5a7a9a;
    --border: rgba(0, 212, 255, 0.15);
    --gradient-1: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-2: linear-gradient(135deg, #050d1a 0%, #0a1628 100%);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.2);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

a:hover {
    color: #fff;
}

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

ul, ol {
    list-style: none;
}

/* =============================================
   HEADER / NAVIGATION
   ============================================= */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 13, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

#header.scrolled {
    background: rgba(5, 13, 26, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.5px;
}

.logo img {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.logo span {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: 8px;
    transition: var(--transition);
    font-weight: 500;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.08);
}

.nav-cta {
    background: var(--gradient-1) !important;
    color: #fff !important;
    padding: 10px 24px !important;
    border-radius: 50px !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.5) !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* =============================================
   HERO / BANNER SECTION
   ============================================= */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 70px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #050d1a 0%, #071428 50%, #050d1a 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1280px;
    margin: 0 auto;
    padding: 80px 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #fff;
}

.hero-text h1 .highlight {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text .subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-bottom: 40px;
}

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

.stat-item .num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-item .label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-1);
    color: #fff;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    transition: var(--transition);
    box-shadow: 0 4px 25px rgba(0, 212, 255, 0.35);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(0, 212, 255, 0.5);
    color: #fff;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--primary);
    padding: 13px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    border: 1.5px solid var(--primary);
    transition: var(--transition);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-3px);
    color: var(--primary);
}

/* =============================================
   CAROUSEL / SWIPER
   ============================================= */
.carousel-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), var(--shadow-glow);
    border: 1px solid var(--border);
}

.carousel-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.carousel-slide {
    min-width: 100%;
    position: relative;
}

.carousel-slide img {
    width: 100%;
    height: 360px;
    object-fit: cover;
}

.carousel-slide .slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(transparent, rgba(5, 13, 26, 0.9));
}

.carousel-slide .slide-caption h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.carousel-slide .slide-caption p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.carousel-prev,
.carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    background: rgba(5, 13, 26, 0.8);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    color: var(--primary);
    font-size: 1.2rem;
}

.carousel-prev { left: 16px; }
.carousel-next { right: 16px; }

.carousel-prev:hover,
.carousel-next:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--primary);
}

.carousel-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.carousel-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
}

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

/* =============================================
   SECTION COMMON
   ============================================= */
.section {
    padding: 100px 24px;
}

.section-inner {
    max-width: 1280px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
    border: 1px solid rgba(0, 212, 255, 0.3);
    padding: 6px 18px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.8;
}

/* =============================================
   FEATURES GRID
   ============================================= */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-1);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), var(--shadow-glow);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.6rem;
    color: var(--primary);
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: rgba(0, 212, 255, 0.2);
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* =============================================
   FEATURE SHOWCASE (2-col)
   ============================================= */
.showcase-section {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.showcase-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    padding: 60px 0;
}

.showcase-row + .showcase-row {
    border-top: 1px solid var(--border);
}

.showcase-row.reverse {
    direction: rtl;
}

.showcase-row.reverse > * {
    direction: ltr;
}

.showcase-img {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
}

.showcase-img img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.showcase-img:hover img {
    transform: scale(1.03);
}

.showcase-text h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.3;
}

.showcase-text p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.feature-list li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

/* =============================================
   STATS SECTION
   ============================================= */
.stats-section {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-card .value {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-card .desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* =============================================
   DOWNLOAD SECTION
   ============================================= */
.download-section {
    position: relative;
    overflow: hidden;
}

.download-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../images/download_bg.jpg') center/cover no-repeat;
    opacity: 0.15;
    z-index: 0;
}

.download-section .section-inner {
    position: relative;
    z-index: 1;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.download-card:hover {
    border-color: var(--primary);
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), var(--shadow-glow);
}

.download-card .platform-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.download-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.download-card .version {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.download-card .btn-download {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--gradient-1);
    color: #fff;
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    width: 100%;
    justify-content: center;
}

.download-card .btn-download:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    color: #fff;
}

/* =============================================
   ARTICLE LIST
   ============================================= */
.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.article-card .thumb {
    height: 200px;
    overflow: hidden;
}

.article-card .thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.article-card:hover .thumb img {
    transform: scale(1.05);
}

.article-card .card-body {
    padding: 24px;
}

.article-card .card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.article-card .tag {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.article-card .date {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.article-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card .read-more {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-top: 16px;
}

/* =============================================
   FAQ SECTION
   ============================================= */
.faq-section {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

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

.faq-item {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.open {
    border-color: rgba(0, 212, 255, 0.3);
}

.faq-question {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    gap: 16px;
}

.faq-question h3 {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    line-height: 1.5;
}

.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(0, 212, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: var(--transition);
}

.faq-item.open .faq-icon {
    background: rgba(0, 212, 255, 0.2);
    transform: rotate(45deg);
}

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

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.faq-item.open .faq-answer {
    max-height: 400px;
}

/* =============================================
   BREADCRUMB
   ============================================= */
.breadcrumb {
    padding: 16px 24px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.breadcrumb-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text-muted);
}

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

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

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

.breadcrumb-inner .current {
    color: var(--text-secondary);
}

/* =============================================
   PAGINATION
   ============================================= */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 48px;
}

.pagination a,
.pagination span {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: var(--transition);
}

.pagination a:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 212, 255, 0.08);
}

.pagination .active {
    background: var(--gradient-1);
    color: #fff;
    border-color: transparent;
}

/* =============================================
   ARTICLE CONTENT PAGE
   ============================================= */
.content-layout {
    max-width: 1280px;
    margin: 0 auto;
    padding: 48px 24px;
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 40px;
    align-items: start;
}

.article-main {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.article-main .article-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.article-main h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.4;
    margin-bottom: 16px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.article-meta span {
    font-size: 0.88rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-body {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 1rem;
}

.article-body h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    margin: 32px 0 16px;
}

.article-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 24px 0 12px;
}

.article-body p {
    margin-bottom: 16px;
}

.article-body img {
    border-radius: var(--radius);
    margin: 24px 0;
    border: 1px solid var(--border);
}

.article-body ul, .article-body ol {
    padding-left: 24px;
    margin-bottom: 16px;
    list-style: disc;
}

.article-body ol {
    list-style: decimal;
}

.article-body li {
    margin-bottom: 8px;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-widget {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.sidebar-widget h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.sidebar-list li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.sidebar-list li:last-child {
    border-bottom: none;
}

.sidebar-list li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.5;
}

.sidebar-list li a::before {
    content: '›';
    color: var(--primary);
    flex-shrink: 0;
    font-size: 1.1rem;
}

.sidebar-list li a:hover {
    color: var(--primary);
}

.sidebar-download {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(124, 58, 237, 0.1));
    border-color: rgba(0, 212, 255, 0.2);
    text-align: center;
}

.sidebar-download p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* =============================================
   FOOTER
   ============================================= */
#footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 64px 24px 32px;
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
}

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

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 24px;
}

.footer-col h5 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

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

.footer-col ul li a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-bottom .footer-links {
    display: flex;
    gap: 20px;
}

.footer-bottom .footer-links a {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-bottom .footer-links a:hover {
    color: var(--primary);
}

/* =============================================
   BACK TO TOP
   ============================================= */
#back-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--gradient-1);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
    text-decoration: none;
}

#back-top.show {
    opacity: 1;
    transform: translateY(0);
}

#back-top:hover {
    transform: translateY(-4px);
    color: #fff;
}

/* =============================================
   PAGE HERO (inner pages)
   ============================================= */
.page-hero {
    background: linear-gradient(135deg, #050d1a 0%, #071428 100%);
    padding: 120px 24px 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.page-hero h1 {
    font-size: clamp(1.8rem, 3vw, 2.8rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.page-hero p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-btns {
        justify-content: center;
    }

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

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

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

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

    .sidebar {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

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

    .showcase-row.reverse {
        direction: ltr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(5, 13, 26, 0.98);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border);
        gap: 4px;
    }

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

    .hamburger {
        display: flex;
    }

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

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

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

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

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

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

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

    .carousel-slide img {
        height: 220px;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 60px 16px;
    }

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

    .hero-stats {
        gap: 20px;
    }

    .stat-item .num {
        font-size: 1.6rem;
    }
}

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* =============================================
   NOTICE BAR
   ============================================= */
.notice-bar {
    background: linear-gradient(90deg, rgba(0, 212, 255, 0.1), rgba(124, 58, 237, 0.1));
    border-bottom: 1px solid var(--border);
    padding: 10px 24px;
    text-align: center;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.notice-bar a {
    color: var(--primary);
    font-weight: 600;
}

/* =============================================
   TRUST BADGES
   ============================================= */
.trust-section {
    padding: 40px 24px;
    border-bottom: 1px solid var(--border);
}

.trust-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.trust-item .icon {
    font-size: 1.4rem;
    color: var(--primary);
}