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

:root {
    /* 深色电竞风格 - 参考 design2.html */
    --neon-cyan: #00f3ff;
    --neon-purple: #bc13fe;
    --neon-pink: #ff006e;
    --neon-green: #39ff14;
    --dark-bg: #050508;
    --dark-secondary: #0a0a0f;
    --card-bg: rgba(10, 10, 20, 0.8);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --accent: #00f3ff;
    --accent-secondary: #bc13fe;
    --accent-pink: #ff006e;
    --border-glow: rgba(0, 243, 255, 0.3);
    --navbar-bg: rgba(5, 5, 8, 0.9);
    --footer-bg: #050508;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    overflow-x: hidden;
}

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

/* 粒子背景画布 */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
}

/* 扫描线效果 */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
            to bottom,
            rgba(255,255,255,0) 0%,
            rgba(255,255,255,0) 50%,
            rgba(0,0,0,0.1) 50%,
            rgba(0,0,0,0.1) 100%
    );
    background-size: 100% 4px;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.3;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0; left: 0;
    width: 100%; z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 80px;
    height: 80px;
    transition: all 0.4s ease;
    background: var(--navbar-bg);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(0, 243, 255, 0.15);
}
.navbar.light {
    background: rgba(5, 5, 8, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 243, 255, 0.2);
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}
.nav-logo img { height: 44px; width: auto; }
.nav-logo svg { height: 44px; width: auto; }
.nav-logo-text {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--text-primary);
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
}
.navbar.light .nav-logo-text { color: var(--text-primary); }
.nav-links {
    display: flex;
    gap: 48px;
    list-style: none;
}
.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1px;
    transition: all 0.3s;
    position: relative;
    cursor: pointer;
    padding: 8px 0;
    text-transform: uppercase;
}
.navbar.light .nav-links a { color: var(--text-secondary); }
.nav-links a:hover, .nav-links a.active {
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan);
}
.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    transition: width 0.3s;
    box-shadow: 0 0 10px var(--neon-cyan);
}
.nav-links a:hover::before, .nav-links a.active::before {
    width: 100%;
}
.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}
.nav-icon {
    width: 24px; height: 24px;
    cursor: pointer;
    opacity: 0.7;
    color: var(--text-primary);
    transition: all 0.3s;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
}
.navbar.light .nav-icon { color: var(--text-primary); }
.nav-icon:hover { opacity: 1; color: var(--neon-cyan); }

/* ===== 汉堡菜单按钮（仅窄屏显示） ===== */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    background: transparent;
    border: 1px solid rgba(0, 243, 255, 0.3);
    border-radius: 6px;
    cursor: pointer;
    padding: 10px;
    transition: all 0.3s ease;
    margin-left: auto;
}
.nav-toggle:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 12px rgba(0, 243, 255, 0.4);
}
.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}
.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============ 科技感背景动画 ============ */
.tech-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
    background: transparent;
}
.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 243, 255, 0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    animation: gridMove 15s linear infinite;
    opacity: 0.5;
    pointer-events: none;
}
@keyframes gridMove {
    0% { transform: perspective(500px) rotateX(60deg) translateY(0); }
    100% { transform: perspective(500px) rotateX(60deg) translateY(80px); }
}

/* ============ 首页 (HOME) =================== */
.home-content {
    position: relative;
    z-index: 1;
}
.hero-slider {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 700px;
    overflow: hidden;
    background: transparent;
    touch-action: pan-y; /* 允许垂直滚动，但接管水平滑动 */
    -webkit-user-select: none;
    user-select: none;
}
.slide {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0;
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}
.slide.active { opacity: 1; }
.slide.active .slide-content {
    animation: slideUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(60px); }
    to { opacity: 1; transform: translateY(0); }
}
.slide-bg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    z-index: 1;
}
.slide-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(180deg, rgba(5,5,8,0.8) 0%, rgba(5,5,8,0.5) 50%, rgba(5,5,8,0.8) 100%);
    z-index: 2;
}
.slide-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 1000px;
    padding: 0 20px;
}
.slide-badge {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 30px;
    padding: 10px 20px;
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid rgba(0, 243, 255, 0.3);
    border-radius: 30px;
    backdrop-filter: blur(10px);
}
.badge-text {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255,255,255,0.95);
    letter-spacing: 3px;
    text-transform: uppercase;
}
.badge-tag {
    background: linear-gradient(45deg, var(--neon-cyan), var(--neon-purple));
    color: #000;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
}

/* 故障效果标题 */
.glitch-text {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 72px;
    font-weight: 900;
    position: relative;
    color: #fff;
    letter-spacing: 6px;
    animation: glitch-skew 1s infinite linear alternate-reverse;
    text-shadow: 0 0 30px rgba(0, 243, 255, 0.3);
}
.glitch-text::before,
.glitch-text::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.glitch-text::before {
    left: 2px;
    text-shadow: -2px 0 var(--neon-cyan);
    clip: rect(24px, 550px, 90px, 0);
    animation: glitch-anim-1 2s infinite linear alternate-reverse;
}
.glitch-text::after {
    left: -2px;
    text-shadow: -2px 0 var(--neon-pink);
    clip: rect(85px, 550px, 140px, 0);
    animation: glitch-anim-2 2s infinite linear alternate-reverse;
}
@keyframes glitch-anim-1 {
    0% { clip: rect(20px, 9999px, 15px, 0); }
    20% { clip: rect(60px, 9999px, 70px, 0); }
    40% { clip: rect(20px, 9999px, 5px, 0); }
    60% { clip: rect(80px, 9999px, 50px, 0); }
    80% { clip: rect(10px, 9999px, 40px, 0); }
    100% { clip: rect(50px, 9999px, 90px, 0); }
}
@keyframes glitch-anim-2 {
    0% { clip: rect(65px, 9999px, 100px, 0); }
    20% { clip: rect(10px, 9999px, 30px, 0); }
    40% { clip: rect(90px, 9999px, 95px, 0); }
    60% { clip: rect(30px, 9999px, 60px, 0); }
    80% { clip: rect(70px, 9999px, 80px, 0); }
    100% { clip: rect(40px, 9999px, 20px, 0); }
}
@keyframes glitch-skew {
    0% { transform: skew(0deg); }
    10% { transform: skew(-1deg); }
    20% { transform: skew(1deg); }
    30% { transform: skew(0deg); }
    100% { transform: skew(0deg); }
}

.slide-title {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 64px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 30px;
    color: #fff;
    letter-spacing: 4px;
    text-shadow: 0 4px 30px rgba(0,0,0,0.5);
}
.slide-features {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-bottom: 50px;
}
.feature-item { text-align: center; }
.feature-value { font-size: 20px; font-weight: 700; color: var(--neon-cyan); text-shadow: 0 0 15px rgba(0, 243, 255, 0.5); margin-bottom: 6px; }
.feature-desc { font-size: 14px; color: rgba(255,255,255,0.7); letter-spacing: 1px; }
.feature-divider {
    width: 1px; height: 40px;
    background: rgba(0, 243, 255, 0.3);
}
.slide-product { margin-top: 30px; }
.slide-product img {
    max-width: 500px;
    width: 100%; height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.5));
}
.slider-dots {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 14px;
    z-index: 10;
}
.dot {
    width: 50px; height: 4px;
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.dot:hover { background: rgba(255,255,255,0.4); }
.dot.active { background: rgba(255,255,255,0.8); }
.dot-progress {
    position: absolute;
    top: 0; left: 0;
    height: 100%; width: 0%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    border-radius: 2px;
}
.dot.active .dot-progress { animation: progress 5s linear forwards; }
@keyframes progress { from { width: 0%; } to { width: 100%; } }
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 56px; height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s;
    color: #fff;
    background: rgba(5, 5, 8, 0.5);
    border: 1px solid rgba(0, 243, 255, 0.2);
    border-radius: 50%;
    backdrop-filter: blur(10px);
}
.hero-slider:hover .slider-arrow { opacity: 0.7; }
.slider-arrow:hover { opacity: 1 !important; background: rgba(0, 243, 255, 0.2); border-color: var(--neon-cyan); box-shadow: 0 0 20px rgba(0, 243, 255, 0.3); }
.slider-arrow.prev { left: 40px; }
.slider-arrow.next { right: 40px; }
.slider-arrow svg { width: 24px; height: 24px; fill: #fff; }

/* 移动端滑动提示 */
.swipe-hint {
    position: absolute;
    bottom: 110px;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(5, 5, 8, 0.6);
    border: 1px solid rgba(0, 243, 255, 0.3);
    border-radius: 24px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    z-index: 10;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    pointer-events: none;
    animation: swipeHintPulse 2s ease-in-out infinite;
    transition: opacity 0.6s ease;
}
.swipe-hint svg {
    animation: swipeHintArrow 1.5s ease-in-out infinite;
}
.swipe-hint.fade-out {
    opacity: 0;
}
@keyframes swipeHintPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 243, 255, 0.4); }
    50%      { box-shadow: 0 0 0 8px rgba(0, 243, 255, 0); }
}
@keyframes swipeHintArrow {
    0%, 100% { transform: translateX(0); }
    50%      { transform: translateX(4px); }
}

/* 打字机效果 */
.typewriter-char {
    display: inline-block;
    opacity: 0;
    transform: translateY(20px);
    animation: charAppear 0.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
@keyframes charAppear {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============ 热门产品 =================== */
.products-section {
    padding: 120px 80px;
    background: linear-gradient(180deg, var(--dark-bg) 0%, var(--dark-secondary) 100%);
    position: relative;
    overflow: hidden;
}
.products-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 50% 50%, rgba(0, 243, 255, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}
.products-bg {
    position: absolute;
    top: -20%;
    left: 0;
    width: 100%;
    height: 140%;
    background:
        radial-gradient(ellipse 80% 50% at 50% 50%, rgba(0, 243, 255, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 60% 40% at 30% 30%, rgba(188, 19, 254, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 70% 70%, rgba(255, 0, 110, 0.04) 0%, transparent 60%);
    z-index: 0;
    will-change: transform;
    pointer-events: none;
}
.section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}
.section-title {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: 4px;
}
.section-subtitle {
    font-size: 13px;
    font-weight: 600;
    color: var(--neon-cyan);
    letter-spacing: 6px;
    text-transform: uppercase;
    text-shadow: 0 0 15px rgba(0, 243, 255, 0.5);
}
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.product-card {
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    opacity: 0;
    transform: translateY(40px);
    position: relative;
    overflow: hidden;
}
.product-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}
.product-card:hover {
    transform: translateY(-12px);
}
.product-card:hover .product-img-wrapper {
    border-color: rgba(0, 243, 255, 0.4);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 243, 255, 0.15);
}
.product-img-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    height: 380px;
    background: var(--card-bg);
    transition: all 0.5s;
    border: 1px solid rgba(0, 243, 255, 0.15);
    backdrop-filter: blur(10px);
}
/* 扫描线动画 */
.product-img-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
    animation: cardScan 3s linear infinite;
    z-index: 10;
}
@keyframes cardScan {
    0% { left: -100%; }
    100% { left: 100%; }
}
.product-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.product-card:hover .product-image {
    transform: scale(1.08);
}
.product-name {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 24px;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: 1px;
}

/* ============ 核心优势 =================== */
.features-section {
    padding: 140px 80px;
    background: var(--dark-secondary);
    position: relative;
    overflow: hidden;
}
.features-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: radial-gradient(ellipse at 50% 0%, rgba(0, 243, 255, 0.06) 0%, transparent 60%);
}
.features-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.feature-card {
    text-align: center;
    padding: 50px 30px;
    border-radius: 20px;
    background: var(--card-bg);
    border: 1px solid rgba(0, 243, 255, 0.15);
    backdrop-filter: blur(20px);
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
}
/* 扫描线动画 */
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-purple), transparent);
    animation: cardScan 3s linear infinite;
}
.feature-card.reveal {
    opacity: 1;
    transform: translateY(0);
}
.feature-card:nth-child(1) { transition-delay: 0ms; }
.feature-card:nth-child(2) { transition-delay: 100ms; }
.feature-card:nth-child(3) { transition-delay: 200ms; }
.feature-card:nth-child(4) { transition-delay: 300ms; }
.feature-card:hover {
    transform: translateY(-12px);
    border-color: rgba(0, 243, 255, 0.4);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 40px rgba(0, 243, 255, 0.1);
}
.feature-icon-wrapper {
    position: relative;
    width: 88px;
    height: 88px;
    margin: 0 auto 28px;
}
.feature-glow {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    border-radius: 24px;
    filter: blur(30px);
    opacity: 0;
    transition: opacity 0.4s;
}
.feature-card:hover .feature-glow { opacity: 0.4; }
.feature-icon {
    width: 88px; height: 88px;
    margin: 0 auto;
    background: linear-gradient(135deg, rgba(0, 243, 255, 0.1), rgba(188, 19, 254, 0.1));
    border: 1px solid rgba(0, 243, 255, 0.2);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    transition: all 0.4s;
    position: relative;
    z-index: 1;
}
.feature-card:hover .feature-icon {
    transform: scale(1.08);
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    border-color: transparent;
    box-shadow: 0 12px 35px rgba(0, 243, 255, 0.25);
}
.feature-card-title {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text-primary);
    letter-spacing: 1px;
}
.feature-card-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============ Promo 区域 =================== */
.promo-section {
    position: relative;
    height: 700px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.promo-bg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    filter: brightness(0.3);
    transform: scale(1.1);
    animation: promoZoom 20s ease-in-out infinite alternate;
}
.promo-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(180deg, rgba(5,5,8,0.6) 0%, rgba(5,5,8,0.7) 100%);
    z-index: 1;
}
@keyframes promoZoom {
    from { transform: scale(1.1); }
    to { transform: scale(1.2); }
}
.promo-content { position: relative; z-index: 2; text-align: center; }
.promo-title {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 64px;
    font-weight: 900;
    margin-bottom: 24px;
    color: #fff;
    letter-spacing: 8px;
    text-shadow: 0 0 40px rgba(0, 243, 255, 0.3);
}
.promo-btn {
    display: inline-block;
    padding: 18px 50px;
    background: linear-gradient(45deg, var(--neon-cyan), var(--neon-purple));
    color: #000;
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    font-weight: 700;
    border-radius: 0;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    margin-top: 20px;
    cursor: pointer;
    border: none;
    letter-spacing: 2px;
    clip-path: polygon(10% 0, 100% 0, 90% 100%, 0% 100%);
}
.promo-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 50px rgba(0, 243, 255, 0.4), 0 0 30px rgba(188, 19, 254, 0.3);
}

/* ============ Footer =================== */
.footer {
    background: var(--footer-bg);
    padding: 80px 60px 40px;
    border-top: 1px solid rgba(0, 243, 255, 0.15);
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 80px;
}
.footer-brand { max-width: 320px; }
.footer-brand img {
    height: 44px;
    width: auto;
    margin-bottom: 20px;
    opacity: 0.9;
}
.footer-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    opacity: 0.7;
}
.footer-links {
    display: flex;
    gap: 80px;
}
.footer-col h4 {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: 2px;
    text-transform: uppercase;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 14px; }
.footer-col a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    cursor: pointer;
}
.footer-col a:hover {
    color: var(--neon-cyan);
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.5);
}
.footer-bottom {
    max-width: 1200px;
    margin: 60px auto 0;
    padding-top: 30px;
    border-top: 1px solid rgba(0, 243, 255, 0.1);
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* ============ 滚动条 ======================== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--dark-bg);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--neon-cyan), var(--neon-purple));
    border-radius: 4px;
}

/* ============ 响应式 ======================== */
@media (max-width: 1200px) {
    .features-container { grid-template-columns: repeat(3, 1fr); gap: 24px; }
}
@media (max-width: 1024px) {
    .navbar { padding: 0 30px; }
    .nav-toggle { display: flex; }
    .nav-links {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        flex-direction: column;
        gap: 0;
        background: rgba(5, 5, 8, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(0, 243, 255, 0.25);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
        padding: 8px 0;
        animation: navSlideDown 0.25s ease;
    }
    .nav-links.open { display: flex; }
    .nav-links li { width: 100%; }
    .nav-links a {
        display: block;
        width: 100%;
        padding: 14px 30px;
        font-size: 14px;
        letter-spacing: 2px;
    }
    .nav-links a::before { display: none; }
    .nav-links a:hover, .nav-links a.active {
        background: rgba(0, 243, 255, 0.08);
    }
    .glitch-text, .slide-title { font-size: 36px; }
    .slide-features { flex-wrap: wrap; gap: 20px; }
    .feature-divider { display: none; }
    .features-container { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .features-section { padding: 100px 30px; }
    .section-title { font-size: 32px; letter-spacing: 3px; }
    .feature-card { padding: 36px 24px; }
    .feature-icon-wrapper { width: 72px; height: 72px; margin-bottom: 22px; }
    .feature-icon { width: 72px; height: 72px; font-size: 32px; border-radius: 18px; }
    .feature-card-title { font-size: 18px; margin-bottom: 10px; }
    .feature-card-desc { font-size: 14px; line-height: 1.7; }
    .footer-content { flex-direction: column; gap: 40px; }
    .slider-arrow {
        width: 44px; height: 44px;
        pointer-events: none; /* 触屏设备不响应箭头点击，避免与滑动冲突 */
    }
    .slider-arrow.prev { left: 16px; }
    .slider-arrow.next { right: 16px; }
    .hero-slider:hover .slider-arrow { opacity: 0; } /* 触屏时不显示箭头，避免遮挡 */
}
@keyframes navSlideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}
@media (max-width: 768px) {
    .hero-slider { min-height: 560px; height: calc(100vh - 0px); height: calc(100svh - 0px); }
    .glitch-text, .slide-title { font-size: 28px; }
    .products-section, .features-section { padding: 60px 20px; }
    .products-grid { grid-template-columns: 1fr; }
    .features-container { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .feature-card { padding: 28px 18px; border-radius: 16px; }
    .feature-icon-wrapper { width: 60px; height: 60px; margin-bottom: 18px; }
    .feature-icon { width: 60px; height: 60px; font-size: 26px; border-radius: 14px; }
    .feature-card-title { font-size: 16px; margin-bottom: 8px; letter-spacing: 0.5px; }
    .feature-card-desc { font-size: 13px; line-height: 1.6; }
    .section-header { margin-bottom: 40px; }
    .section-title { font-size: 26px; letter-spacing: 2px; }
    .section-subtitle { font-size: 11px; letter-spacing: 4px; }
    .promo-title { font-size: 32px; }
    .footer { padding: 40px 20px; }
    .footer-links { flex-direction: column; gap: 30px; }
    .swipe-hint { display: inline-flex; }
    .slider-dots { bottom: 28px; }
}
@media (max-width: 480px) {
    .hero-slider { min-height: 500px; }
    .glitch-text, .slide-title { font-size: 22px; letter-spacing: 2px; }
    .slide-badge { padding: 6px 14px; margin-bottom: 18px; }
    .badge-text { font-size: 11px; }
    .badge-tag { font-size: 10px; padding: 3px 10px; }
    .swipe-hint { font-size: 11px; padding: 8px 14px; bottom: 90px; }
    .features-container { grid-template-columns: 1fr; gap: 14px; }
    .feature-card { padding: 26px 20px; }
    .section-title { font-size: 22px; }
}
@media (max-width: 480px) {
    .hero-slider { min-height: 500px; }
    .glitch-text, .slide-title { font-size: 22px; letter-spacing: 2px; }
    .slide-badge { padding: 6px 14px; margin-bottom: 18px; }
    .badge-text { font-size: 11px; }
    .badge-tag { font-size: 10px; padding: 3px 10px; }
    .swipe-hint { font-size: 11px; padding: 8px 14px; bottom: 90px; }
}

/* ============ 其他页面通用样式 ======================== */
.page-header {
    padding: 150px 60px 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--dark-secondary) 0%, var(--dark-bg) 100%);
    position: relative;
    overflow: hidden;
}
.page-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: radial-gradient(circle at 50% 0%, rgba(0, 243, 255, 0.08) 0%, transparent 60%);
}
.page-header h1 {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 15px;
    letter-spacing: 4px;
    color: var(--text-primary);
}
.page-header p {
    font-size: 16px;
    color: var(--text-muted);
    letter-spacing: 4px;
    text-transform: uppercase;
}

/* ============ 产品中心页面 ============ */
.products-page {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    background: var(--dark-bg);
}
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: 50px;
    border-bottom: 1px solid rgba(0, 243, 255, 0.1);
    position: relative;
    z-index: 1;
}
.category-tab {
    padding: 15px 30px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.category-tab:hover { color: var(--neon-cyan); }
.category-tab.active {
    color: var(--neon-cyan);
    border-bottom-color: var(--neon-cyan);
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.5);
}

.products-list {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px 100px;
    position: relative;
    z-index: 1;
}
.product-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid rgba(0, 243, 255, 0.15);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s;
}
.product-row:hover {
    border-color: rgba(0, 243, 255, 0.3);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3), 0 0 30px rgba(0, 243, 255, 0.1);
}
.product-row:nth-child(even) { direction: rtl; }
.product-row:nth-child(even) > * { direction: ltr; }
.product-row-image {
    border-radius: 0;
    overflow: hidden;
    position: relative;
    height: 350px;
}
.product-row-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}
.product-row:hover .product-row-image img { transform: scale(1.05); }
.product-row-image .tag {
    position: absolute;
    top: 20px; left: 20px;
    background: linear-gradient(45deg, var(--neon-cyan), var(--neon-purple));
    color: #000;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
}
.product-row-info { padding: 40px; }
.product-row-info h3 {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-primary);
    letter-spacing: 1px;
}
.product-row-info .subtitle {
    font-size: 16px;
    color: var(--neon-cyan);
    margin-bottom: 16px;
    font-weight: 600;
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.3);
}
.product-row-info .desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}
.specs {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}
.spec-item {
    text-align: center;
    padding: 12px 18px;
    background: rgba(0, 243, 255, 0.05);
    border: 1px solid rgba(0, 243, 255, 0.15);
    border-radius: 12px;
    min-width: 80px;
}
.spec-item .value {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.3);
}
.spec-item .label {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
}
.price-row { display: flex; align-items: center; gap: 20px; }
.buy-btn {
    padding: 14px 35px;
    background: linear-gradient(45deg, var(--neon-cyan), var(--neon-purple));
    color: #000;
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 14px;
    font-weight: 700;
    border-radius: 0;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    letter-spacing: 1px;
    clip-path: polygon(8% 0, 100% 0, 92% 100%, 0% 100%);
}
.buy-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 243, 255, 0.3);
}

.products-grid-dark {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px 100px;
    position: relative;
    z-index: 1;
}

/* ============ 产品中心页面 - 响应式 ============ */
@media (max-width: 1200px) {
    .products-grid-dark { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 1024px) {
    .page-header { padding: 130px 30px 60px; }
    .page-header h1 { font-size: 38px; letter-spacing: 3px; }
    .products-list, .products-grid-dark { padding: 0 30px 80px; }
    .products-grid-dark { grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .product-row { gap: 30px; margin-bottom: 50px; }
    .product-row-info { padding: 30px; }
    .product-row-info h3 { font-size: 24px; }
    .product-row-image { height: 320px; }
}
@media (max-width: 768px) {
    .page-header { padding: 110px 20px 50px; }
    .page-header h1 { font-size: 32px; letter-spacing: 2px; }
    .page-header p { font-size: 14px; letter-spacing: 3px; }
    .category-tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        flex-wrap: nowrap;
        justify-content: flex-start;
        padding: 0 20px;
        margin-bottom: 30px;
        scrollbar-width: thin;
    }
    .category-tab {
        padding: 12px 20px;
        font-size: 13px;
        white-space: nowrap;
        flex-shrink: 0;
    }
    .products-list, .products-grid-dark { padding: 0 20px 60px; }
    .products-grid-dark { grid-template-columns: repeat(2, 1fr); gap: 16px; }

    /* 特色产品行：单列布局 */
    .product-row {
        grid-template-columns: 1fr;
        gap: 0;
        margin-bottom: 30px;
    }
    /* 移动端取消奇偶反转（rtl hack） */
    .product-row:nth-child(even),
    .product-row:nth-child(even) > * { direction: ltr; }
    .product-row-image {
        height: 240px;
    }
    .product-row-info { padding: 24px 22px; }
    .product-row-info h3 { font-size: 20px; letter-spacing: 0.5px; }
    .product-row-info .subtitle { font-size: 14px; }
    .product-row-info .desc { font-size: 14px; line-height: 1.7; margin-bottom: 18px; }
    .specs { gap: 10px; margin-bottom: 22px; }
    .spec-item {
        padding: 10px 14px;
        min-width: 70px;
        border-radius: 10px;
    }
    .spec-item .value { font-size: 16px; }
    .spec-item .label { font-size: 10px; }
    .buy-btn {
        padding: 12px 28px;
        font-size: 13px;
        width: 100%;
    }
}
@media (max-width: 480px) {
    .page-header { padding: 100px 16px 40px; }
    .page-header h1 { font-size: 26px; letter-spacing: 1px; }
    .page-header p { font-size: 12px; letter-spacing: 2px; }
    .category-tab { padding: 10px 16px; font-size: 12px; }
    .products-list, .products-grid-dark { padding: 0 16px 50px; }
    .products-grid-dark { grid-template-columns: 1fr; gap: 14px; }
    .product-row-image { height: 200px; }
    .product-row-info { padding: 20px 18px; }
    .product-row-info h3 { font-size: 18px; }
    .specs { gap: 8px; }
    .spec-item { padding: 8px 12px; min-width: 60px; }
    .spec-item .value { font-size: 14px; }
    .spec-item .label { font-size: 9px; }
}
.product-card-dark {
    background: var(--card-bg);
    border: 1px solid rgba(0, 243, 255, 0.15);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.product-card-dark::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
    animation: cardScan 3s linear infinite;
}
.product-card-dark:hover {
    border-color: rgba(0, 243, 255, 0.4);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 243, 255, 0.15);
}
.product-card-dark img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--dark-secondary);
}
.product-card-dark .info { padding: 20px; }
.product-card-dark .name {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}
.product-card-dark .desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.5;
}

/* ============ 关于我们页面 ============ */
.about-page {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    background: var(--dark-bg);
}
.about-hero {
    height: 500px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.about-hero-bg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    filter: brightness(0.3);
}
.about-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}
.about-hero-content h1 {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 52px;
    font-weight: 900;
    margin-bottom: 15px;
    color: var(--text-primary);
    letter-spacing: 6px;
    text-shadow: 0 0 30px rgba(0, 243, 255, 0.3);
}
.about-hero-content h1 span { color: var(--neon-cyan); }
.about-hero-content p {
    font-size: 16px;
    color: var(--text-muted);
    letter-spacing: 8px;
    text-transform: uppercase;
}
.about-story {
    padding: 100px 60px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.story-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 100px;
}
.story-row:nth-child(even) { direction: rtl; }
.story-row:nth-child(even) > * { direction: ltr; }
.story-image {
    border-radius: 20px;
    overflow: hidden;
    background: var(--card-bg);
    border: 1px solid rgba(0, 243, 255, 0.15);
    height: 350px;
}
.story-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}
.story-image:hover img { transform: scale(1.05); }
.story-text h3 {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
    letter-spacing: 1px;
}
.story-text h3 span { color: var(--neon-cyan); }
.story-text p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 15px;
}

/* ============ APP下载页面 ============ */
.appdownload-page {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    background: var(--dark-bg);
}
.appdownload-hero {
    padding: 150px 60px 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    position: relative;
    overflow: hidden;
}
.appdownload-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: radial-gradient(circle at 50% 30%, rgba(0, 243, 255, 0.1) 0%, transparent 60%);
}
.appdownload-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
}
.app-logo {
    width: 140px; height: 140px;
    margin: 0 auto 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 243, 255, 0.15), rgba(188, 19, 254, 0.15));
    border: 2px solid rgba(0, 243, 255, 0.3);
    border-radius: 28px;
    animation: appLogoFloat 3s ease-in-out infinite;
}
@keyframes appLogoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.app-logo img {
    width: 80px; height: 80px;
    object-fit: contain;
    filter: drop-shadow(0 4px 12px rgba(0, 243, 255, 0.3));
}
.app-title {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 18px;
    letter-spacing: 3px;
    color: var(--text-primary);
}
.app-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}
.app-download-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}
.app-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 36px;
    border-radius: 0;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    letter-spacing: 1px;
    clip-path: polygon(8% 0, 100% 0, 92% 100%, 0% 100%);
}
.app-btn svg { width: 22px; height: 22px; }
.app-btn-primary {
    background: linear-gradient(45deg, var(--neon-cyan), var(--neon-purple));
    color: #000;
    box-shadow: 0 8px 30px rgba(0, 243, 255, 0.3);
}
.app-btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 243, 255, 0.4);
}
.app-btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(0, 243, 255, 0.4);
}
.app-btn-secondary:hover {
    background: rgba(0, 243, 255, 0.1);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    transform: translateY(-3px);
}

/* APP 功能亮点 */
.app-features-section {
    padding: 80px 60px 120px;
    background: var(--dark-secondary);
    position: relative;
    z-index: 1;
}
.app-features-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: radial-gradient(ellipse at 50% 0%, rgba(0, 243, 255, 0.06) 0%, transparent 60%);
}
.app-features-title {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    text-align: center;
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
    color: var(--text-primary);
    letter-spacing: 4px;
}
.app-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.app-feature-item {
    background: var(--card-bg);
    border: 1px solid rgba(0, 243, 255, 0.15);
    border-radius: 16px;
    padding: 35px 30px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.app-feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-purple), transparent);
    animation: cardScan 3s linear infinite;
}
.app-feature-item:hover {
    border-color: rgba(0, 243, 255, 0.3);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(0, 243, 255, 0.1);
}
.app-feature-num {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 36px;
    font-weight: 800;
    color: rgba(0, 243, 255, 0.2);
    margin-bottom: 15px;
    line-height: 1;
}
.app-feature-item h4 {
    font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
    letter-spacing: 1px;
}
.app-feature-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* APP 功能亮点 - 响应式（必须放在默认规则之后，否则会被覆盖） */
@media (max-width: 1024px) {
    .app-features-section { padding: 60px 30px 80px; }
    .app-features-title { font-size: 26px; margin-bottom: 40px; letter-spacing: 2px; }
    .app-features-grid { grid-template-columns: 1fr; gap: 20px; max-width: 600px; }
    .app-feature-item { padding: 28px 26px; }
    .app-feature-num { font-size: 30px; margin-bottom: 12px; }
    .app-feature-item h4 { font-size: 17px; }
    .app-feature-item p { font-size: 13px; }
}
@media (max-width: 480px) {
    .app-features-section { padding: 50px 16px 60px; }
    .app-features-title { font-size: 22px; margin-bottom: 30px; letter-spacing: 2px; }
    .app-features-grid { gap: 14px; }
    .app-feature-item { padding: 22px 18px; border-radius: 12px; }
    .app-feature-num { font-size: 26px; margin-bottom: 8px; }
    .app-feature-item h4 { font-size: 15px; margin-bottom: 6px; }
    .app-feature-item p { font-size: 12px; line-height: 1.6; }
}