/* ===== CSS Reset & Variables ===== */
:root {
    --bg-deep: #0a0e17;
    --bg-dark: #111827;
    --bg-card: #1a1f2e;
    --gold: #d4a853;
    --gold-light: #f0d68a;
    --gold-dark: #b8861f;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --accent: #c0392b;
    --accent-light: #e74c3c;
    --grad-hero: linear-gradient(180deg, rgba(10,14,23,0) 0%, rgba(10,14,23,0.7) 60%, rgba(10,14,23,1) 100%);
    --grad-card: linear-gradient(135deg, rgba(212,168,83,0.08) 0%, rgba(212,168,83,0.02) 100%);
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --shadow-gold: 0 4px 24px rgba(212,168,83,0.15);
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-deep);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--gold-dark); border-radius: 3px; }

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
}
.nav.scrolled {
    background: rgba(10,14,23,0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.5);
    padding: 10px 0;
}
.nav-inner {
    max-width: 1200px; margin: 0 auto;
    padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none;
}
.nav-logo-img {
    width: 44px; height: 44px; border-radius: 12px;
    object-fit: cover; border: 2px solid var(--gold);
}
.nav-logo-text {
    font-size: 1.3rem; font-weight: 700;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
    color: var(--text-muted); text-decoration: none;
    font-size: 0.95rem; font-weight: 500;
    transition: var(--transition); position: relative;
}
.nav-links a::after {
    content: ''; position: absolute;
    bottom: -4px; left: 0; width: 0; height: 2px;
    background: var(--gold); transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active {
    color: var(--gold-light);
}
.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}
.nav-toggle {
    display: none; background: none; border: none;
    color: var(--text); font-size: 1.6rem; cursor: pointer;
    padding: 4px;
}
.nav-mobile {
    display: none; position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(10,14,23,0.98);
    z-index: 1100;
    flex-direction: column; align-items: center; justify-content: center;
    gap: 32px;
}
.nav-mobile.active { display: flex; }
.nav-mobile a {
    color: var(--text); text-decoration: none;
    font-size: 1.3rem; font-weight: 600;
    transition: var(--transition);
}
.nav-mobile a:hover { color: var(--gold-light); }
.nav-mobile-close {
    position: absolute; top: 24px; right: 24px;
    background: none; border: none; color: var(--text);
    font-size: 1.8rem; cursor: pointer;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        linear-gradient(135deg, rgba(10,14,23,0.75) 0%, rgba(10,14,23,0.6) 40%, rgba(10,14,23,0.8) 100%),
        url('images/banner/banner4a2b840cd896184e4c5020756d0e16421759042758.jpg') center/cover no-repeat;
    z-index: 0;
}
.hero-bg-particles {
    position: absolute; inset: 0; z-index: 1; opacity: 0.4;
    background:
        radial-gradient(circle at 20% 30%, rgba(212,168,83,0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(231,76,60,0.08) 0%, transparent 40%),
        radial-gradient(circle at 60% 70%, rgba(212,168,83,0.1) 0%, transparent 45%);
}
.hero-bg-pattern {
    position: absolute; inset: 0; z-index: 1;
    background-image:
        radial-gradient(1px 1px at 10% 15%, rgba(212,168,83,0.3), transparent),
        radial-gradient(1px 1px at 25% 35%, rgba(212,168,83,0.2), transparent),
        radial-gradient(1px 1px at 40% 10%, rgba(240,214,138,0.3), transparent),
        radial-gradient(1px 1px at 55% 25%, rgba(212,168,83,0.2), transparent),
        radial-gradient(1px 1px at 70% 40%, rgba(240,214,138,0.25), transparent),
        radial-gradient(1px 1px at 85% 20%, rgba(212,168,83,0.2), transparent),
        radial-gradient(2px 2px at 15% 55%, rgba(212,168,83,0.25), transparent),
        radial-gradient(2px 2px at 50% 60%, rgba(212,168,83,0.2), transparent),
        radial-gradient(2px 2px at 80% 55%, rgba(240,214,138,0.2), transparent),
        radial-gradient(2px 2px at 30% 75%, rgba(212,168,83,0.15), transparent),
        radial-gradient(2px 2px at 65% 80%, rgba(212,168,83,0.2), transparent);
    background-size: 200px 200px;
}
.hero-content {
    position: relative; z-index: 2; max-width: 800px;
}
.hero-icon {
    width: 100px; height: 100px; border-radius: 24px;
    border: 3px solid var(--gold);
    box-shadow: var(--shadow-gold), 0 0 40px rgba(212,168,83,0.2);
    margin-bottom: 28px;
    animation: float 3s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.hero-badge {
    display: inline-block;
    padding: 6px 18px; border-radius: 20px;
    background: rgba(212,168,83,0.12);
    border: 1px solid rgba(212,168,83,0.3);
    color: var(--gold-light); font-size: 0.85rem;
    font-weight: 500; margin-bottom: 20px;
    letter-spacing: 1px;
}
.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold) 40%, #f5e6b8 70%, var(--gold-dark) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    margin-bottom: 16px; letter-spacing: 6px;
    text-shadow: none;
    filter: drop-shadow(0 2px 8px rgba(212,168,83,0.3));
}
.hero-subtitle {
    font-size: 1.2rem; color: var(--text-muted);
    margin-bottom: 12px; font-weight: 400;
}
.hero-tagline {
    font-size: 1rem; color: rgba(212,168,83,0.7);
    margin-bottom: 36px; letter-spacing: 3px;
}
.hero-info {
    display: flex; gap: 24px; justify-content: center;
    flex-wrap: wrap; margin-bottom: 36px;
}
.hero-info-item {
    padding: 10px 20px;
    background: var(--grad-card);
    border: 1px solid rgba(212,168,83,0.15);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}
.hero-info-item span {
    color: var(--gold-light); font-weight: 600;
}
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 36px; border-radius: 30px;
    font-size: 1.05rem; font-weight: 700;
    text-decoration: none; cursor: pointer;
    transition: var(--transition); border: none;
    letter-spacing: 1px;
}
.btn-primary {
    background: linear-gradient(135deg, var(--gold-dark), var(--gold));
    color: #1a1a1a;
    box-shadow: 0 4px 20px rgba(212,168,83,0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(212,168,83,0.45);
}
.btn-outline {
    background: transparent;
    border: 2px solid rgba(212,168,83,0.4);
    color: var(--gold-light);
}
.btn-outline:hover {
    border-color: var(--gold);
    background: rgba(212,168,83,0.08);
}
.hero-scroll {
    position: absolute; bottom: 32px; left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    color: var(--gold);
    font-size: 1.5rem;
    z-index: 2;
    opacity: 0.7;
}
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ===== Hero QR Tooltip ===== */
.hero-btn-wrap {
    position: relative;
}
.hero-qr-tooltip {
    position: absolute;
    bottom: calc(100% + 16px);
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    border-radius: var(--radius-sm);
    padding: 12px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s, visibility 0.25s;
    z-index: 100;
    pointer-events: none;
}
.hero-qr-tooltip::before {
    content: '';
    position: absolute;
    bottom: -8px; left: 50%;
    transform: translateX(-50%);
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid #fff;
}
.hero-qr-tooltip.show {
    opacity: 1;
    visibility: visible;
}
.hero-qr-tooltip img, .hero-qr-tooltip canvas {
    display: block;
    width: 130px; height: 130px;
}
.hero-qr-tooltip span {
    display: block;
    margin-top: 8px;
    font-size: 0.75rem;
    color: #666;
}

/* ===== Section Common ===== */
.section {
    padding: 100px 24px;
    max-width: 1200px;
    margin: 0 auto;
}
.section-header {
    text-align: center; margin-bottom: 60px;
}
.section-label {
    display: inline-block;
    padding: 5px 16px; border-radius: 20px;
    background: rgba(212,168,83,0.1);
    border: 1px solid rgba(212,168,83,0.2);
    color: var(--gold-light); font-size: 0.8rem;
    letter-spacing: 3px; text-transform: uppercase;
    margin-bottom: 16px;
}
.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800; margin-bottom: 12px;
}
.section-desc {
    color: var(--text-muted); max-width: 600px;
    margin: 0 auto; font-size: 1rem;
}

/* ===== About Section ===== */
.about-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 60px; align-items: center;
}
.about-visual {
    position: relative;
}
.about-img-main {
    width: 100%; border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.about-img-main:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 40px rgba(212,168,83,0.2);
}
.about-floating {
    position: absolute;
    bottom: -30px; right: -30px;
    width: 120px; height: 120px;
    border-radius: 20px; border: 2px solid var(--gold);
    box-shadow: var(--shadow-gold);
    animation: float 4s ease-in-out infinite;
    object-fit: cover;
}
.about-text h3 {
    font-size: 1.8rem; font-weight: 700; margin-bottom: 20px;
    color: var(--gold-light);
}
.about-text p {
    color: var(--text-muted); margin-bottom: 16px;
    font-size: 1.02rem; line-height: 1.9;
}
.about-stats {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 16px; margin-top: 28px;
}
.about-stat {
    text-align: center; padding: 18px 12px;
    background: var(--grad-card);
    border: 1px solid rgba(212,168,83,0.1);
    border-radius: var(--radius-sm);
}
.about-stat-num {
    font-size: 1.6rem; font-weight: 800;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.about-stat-label {
    font-size: 0.8rem; color: var(--text-muted); margin-top: 4px;
}

/* ===== Features Section ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.feature-card {
    padding: 40px 28px;
    background: var(--bg-card);
    border: 1px solid rgba(212,168,83,0.08);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative; overflow: hidden;
}
.feature-card::before {
    content: ''; position: absolute;
    top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    opacity: 0; transition: var(--transition);
}
.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(212,168,83,0.2);
    box-shadow: var(--shadow-gold);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
    width: 56px; height: 56px; border-radius: 14px;
    background: rgba(212,168,83,0.1);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem; margin-bottom: 20px;
}
.feature-card h4 {
    font-size: 1.2rem; margin-bottom: 10px; font-weight: 700;
}
.feature-card p {
    color: var(--text-muted); font-size: 0.92rem;
}

/* ===== Screenshots Section ===== */
.screenshots-wrapper {
    position: relative;
}
.screenshots-scroll {
    display: flex; gap: 20px;
    overflow-x: auto; scroll-snap-type: x mandatory;
    padding-bottom: 16px;
    scrollbar-width: none;
}
.screenshots-scroll::-webkit-scrollbar { display: none; }
.screenshot-item {
    flex: 0 0 auto; width: min(320px, 80vw);
    scroll-snap-align: start;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}
.screenshot-item:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 36px rgba(212,168,83,0.25);
}
.screenshot-item img {
    width: 100%; display: block; aspect-ratio: 9/16;
    object-fit: cover;
}
.screenshots-nav {
    display: flex; gap: 8px; justify-content: center;
    margin-top: 24px;
}
.screenshots-nav button {
    width: 10px; height: 10px; border-radius: 50%;
    border: none; cursor: pointer;
    background: rgba(212,168,83,0.25);
    transition: var(--transition);
}
.screenshots-nav button.active { background: var(--gold); transform: scale(1.3); }

/* ===== Artwork Grid ===== */
.artwork-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.artwork-item {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}
.artwork-item:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 36px rgba(212,168,83,0.25);
}
.artwork-item img {
    width: 100%; display: block;
    aspect-ratio: 9/16;
    object-fit: cover;
}

/* ===== Bonuses Section ===== */
.bonuses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}
.bonus-card {
    padding: 32px 24px;
    background: var(--grad-card);
    border: 1px solid rgba(212,168,83,0.1);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}
.bonus-card:hover {
    transform: translateY(-4px);
    border-color: rgba(212,168,83,0.25);
    box-shadow: var(--shadow-gold);
}
.bonus-number {
    font-size: 3rem; font-weight: 900;
    color: rgba(212,168,83,0.08);
    position: absolute;
    top: 12px; right: 20px;
    line-height: 1;
}
.bonus-icon {
    font-size: 2rem; margin-bottom: 14px;
}
.bonus-card h4 {
    font-size: 1.1rem; margin-bottom: 8px;
    color: var(--gold-light); font-weight: 700;
}
.bonus-card p {
    color: var(--text-muted); font-size: 0.9rem;
}

/* ===== Download Section ===== */
.download-wrapper {
    max-width: 520px;
    margin: 0 auto;
}
.download-card {
    background: var(--bg-card);
    border: 1px solid rgba(212,168,83,0.1);
    border-radius: var(--radius);
    padding: 48px 40px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.download-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(212,168,83,0.06) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition);
}
.download-card:hover {
    transform: translateY(-6px);
    border-color: rgba(212,168,83,0.3);
    box-shadow: var(--shadow-gold);
}
.download-card:hover::before {
    opacity: 1;
}
.download-card-icon {
    width: 80px; height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(212,168,83,0.15), rgba(212,168,83,0.05));
    display: flex; align-items: center; justify-content: center;
    color: var(--gold-light);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}
.download-card h3 {
    font-size: 1.4rem; font-weight: 700;
    margin-bottom: 8px; position: relative; z-index: 1;
}
.download-card > p {
    color: var(--text-muted); font-size: 0.9rem;
    margin-bottom: 16px; position: relative; z-index: 1;
}
.download-info {
    display: flex; gap: 16px; margin-bottom: 24px;
    position: relative; z-index: 1;
}
.download-info span {
    padding: 5px 14px;
    background: rgba(212,168,83,0.08);
    border-radius: 15px;
    font-size: 0.8rem; color: var(--text-muted);
}
.download-btns {
    display: flex; gap: 16px;
    position: relative; z-index: 1;
    flex-wrap: wrap; justify-content: center;
}
.download-btn {
    justify-content: center; position: relative; z-index: 1;
    padding: 13px 28px;
    min-width: 150px;
}
.download-qr {
    margin-top: 28px;
    display: flex; flex-direction: column;
    align-items: center; gap: 10px;
    position: relative; z-index: 1;
}
.qr-placeholder {
    width: 140px; height: 140px;
    background: #fff;
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    padding: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.qr-placeholder img, .qr-placeholder canvas {
    display: block;
    width: 124px; height: 124px;
}
.download-qr span {
    font-size: 0.8rem; color: var(--text-muted);
}

/* ===== Ratio Highlight ===== */
.ratio-banner {
    background: linear-gradient(135deg, rgba(212,168,83,0.08), rgba(184,134,31,0.05));
    border: 1px solid rgba(212,168,83,0.2);
    border-radius: var(--radius);
    padding: 28px 36px;
    display: flex; align-items: center; gap: 24px;
    flex-wrap: wrap; justify-content: center;
    margin-bottom: 40px;
}
.ratio-badge {
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--gold-dark), var(--gold));
    border-radius: 25px;
    font-weight: 800; font-size: 1.1rem;
    color: #1a1a1a;
}
.ratio-text {
    color: var(--text-muted); font-size: 0.95rem;
}

/* ===== Video Section ===== */
.video-section {
    max-width: 900px; margin: 0 auto;
}
.video-wrapper {
    position: relative; border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow);
}
.video-wrapper video {
    width: 100%; display: block; border-radius: var(--radius);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 32px; right: 32px;
    z-index: 900;
    width: 48px; height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gold-dark), var(--gold));
    border: none;
    color: #1a1a1a;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 16px rgba(212,168,83,0.3);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s, transform 0.3s, background 0.3s;
    pointer-events: none;
}
.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.back-to-top:hover {
    background: linear-gradient(135deg, var(--gold), var(--gold-light));
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(212,168,83,0.45);
}

/* ===== Footer ===== */
.footer {
    text-align: center; padding: 60px 24px 40px;
    border-top: 1px solid rgba(212,168,83,0.1);
}
.footer-info {
    display: flex; gap: 32px; justify-content: center;
    flex-wrap: wrap; margin-bottom: 24px;
    color: var(--text-muted); font-size: 0.9rem;
}
.footer-info span { color: var(--text); }
.footer-copy {
    color: rgba(148,163,184,0.5); font-size: 0.8rem;
}
.footer-links {
    display: flex; align-items: center; justify-content: center;
    flex-wrap: wrap; gap: 6px; margin-bottom: 20px;
    font-size: 0.85rem; color: var(--text-muted);
}
.footer-links-title {
    color: var(--gold); font-weight: 600;
}
.footer-links a {
    color: var(--text-muted); text-decoration: none;
    transition: color 0.25s;
}
.footer-links a:hover {
    color: var(--gold);
}
.footer-links-divider {
    color: rgba(148,163,184,0.25);
}

/* ===== Lightbox ===== */
.lightbox {
    display: none; position: fixed;
    inset: 0; z-index: 2000;
    background: rgba(0,0,0,0.92);
    align-items: center; justify-content: center;
    cursor: pointer;
}
.lightbox.active { display: flex; }
.lightbox img {
    max-width: 90vw; max-height: 90vh;
    border-radius: 12px; object-fit: contain;
}
.lightbox-close {
    position: absolute; top: 24px; right: 32px;
    background: none; border: none; color: #fff;
    font-size: 2rem; cursor: pointer; z-index: 1;
}

/* ===== Animations ===== */
.fade-in {
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in.visible {
    opacity: 1; transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hero-qr-tooltip { display: none; }
    .nav-links { display: none; }
    .nav-toggle { display: block; }
    .hero { padding: 100px 20px 60px; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-floating { width: 80px; height: 80px; right: -15px; bottom: -20px; }
    .about-stats { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .about-stat { padding: 14px 8px; }
    .about-stat-num { font-size: 1.3rem; }
    .section { padding: 60px 20px; }
    .hero-info { gap: 12px; }
    .hero-info-item { font-size: 0.8rem; padding: 8px 14px; }
    .ratio-banner { flex-direction: column; text-align: center; padding: 20px; }
    .features-grid { grid-template-columns: 1fr; }
    .bonuses-grid { grid-template-columns: 1fr; }
    .artwork-grid { grid-template-columns: repeat(2, 1fr); }
    .btn { padding: 12px 28px; font-size: 0.95rem; }
    .download-wrapper {
        max-width: 100%;
    }
    .download-card {
        padding: 36px 24px;
    }
}

@media (max-width: 480px) {
    .hero-title { letter-spacing: 3px; }
    .hero-icon { width: 76px; height: 76px; border-radius: 18px; }
    .section-title { font-size: 1.5rem; }
    .about-stats { grid-template-columns: repeat(3, 1fr); }
}