:root {
    --bg-deep: #0d0d1a;
    --bg-card: rgba(13, 13, 30, 0.6);
    --bg-footer: #050510;
    --neon-cyan: #00f0ff;
    --neon-purple: #b14aed;
    --neon-cyan-dim: rgba(0, 240, 255, 0.15);
    --neon-purple-dim: rgba(177, 74, 237, 0.15);
    --text-primary: #e8eaf6;
    --text-muted: #8892a4;
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-deep);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ===== LOGO ===== */

.logo {
    width: 8rem;
    padding: 1.5rem 0;
}

@media (max-width: 768px) {
    .logo {
        width: 6.5rem;
    }
}

/* ===== HERO SECTION ===== */

.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 2rem 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 40%, rgba(0, 240, 255, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 30%, rgba(177, 74, 237, 0.06) 0%, transparent 60%),
        var(--bg-deep);
    overflow: hidden;
}

.hero-grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 20%, transparent 70%);
    pointer-events: none;
}

.min-vh-hero {
    min-height: 85vh;
}

.hero-content {
    position: relative;
    z-index: 2;
}

/* ===== GLOWING TEXT ===== */

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin: 1.5rem 0 2rem;
    letter-spacing: 0.02em;
}

.glow-text {
    background: linear-gradient(135deg, var(--neon-cyan) 0%, #80f8ff 40%, var(--neon-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 28px rgba(0, 240, 255, 0.35));
}

.glow-text-sm {
    background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 16px rgba(0, 240, 255, 0.2));
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2.2rem;
    }
}

/* ===== FEATURE LIST ===== */

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 0.7rem 1rem;
    border-radius: 10px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: border-color 0.3s, background 0.3s;
}

.feature-item:hover {
    border-color: rgba(0, 240, 255, 0.25);
    background: rgba(0, 240, 255, 0.04);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.4rem;
    height: 2.4rem;
    flex-shrink: 0;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--neon-cyan-dim), var(--neon-purple-dim));
    color: var(--neon-cyan);
    font-size: 1.1rem;
}

.feature-text {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* ===== NEON BUTTON ===== */

#download-btn,
.btn-neon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 2.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-purple) 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.25s, box-shadow 0.25s;
    box-shadow:
        0 0 20px rgba(0, 240, 255, 0.25),
        0 0 60px rgba(177, 74, 237, 0.15);
    width: 100%;
    max-width: 22rem;
}

#download-btn:hover,
.btn-neon:hover {
    transform: translateY(-2px);
    box-shadow:
        0 0 30px rgba(0, 240, 255, 0.4),
        0 0 80px rgba(177, 74, 237, 0.25);
}

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

#download-btn::before,
.btn-neon::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transition: left 0.5s;
}

#download-btn:hover::before,
.btn-neon:hover::before {
    left: 100%;
}

/* ===== MOCKUP ===== */

.hero-mockup {
    position: relative;
    z-index: 2;
}

.mockup-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.mockup-pc {
    position: relative;
    z-index: 2;
    max-width: 100%;
    filter: drop-shadow(0 10px 40px rgba(0, 240, 255, 0.12));
}

.mockup-mobile {
    position: absolute;
    width: 8.5rem;
    top: 4rem;
    left: 3.5rem;
    z-index: 3;
    filter: drop-shadow(0 8px 30px rgba(177, 74, 237, 0.15));
}

.mockup-glow {
    position: absolute;
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, rgba(177, 74, 237, 0.05) 50%, transparent 70%);
    border-radius: 50%;
    z-index: 1;
    pointer-events: none;
}

@media (max-width: 576px) {
    .mockup-mobile {
        width: 5.5rem;
        top: 2rem;
        left: 1.5rem;
    }
}

/* ===== DOWNLOAD SECTION ===== */

.download-section {
    padding: 4rem 0 2rem;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

/* ===== GLASSMORPHISM CARDS ===== */

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 1.5rem 1rem;
    transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s, background 0.3s;
}

.glass-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.1), 0 0 0 1px rgba(0, 240, 255, 0.1);
    background: rgba(0, 240, 255, 0.03);
}

.download-card {
    cursor: pointer;
    color: var(--text-primary);
}

.download-card span {
    color: var(--text-primary);
    font-size: 0.9rem;
}

/* ===== DOWNLOAD LINK SHARED ===== */

.download-link {
    text-decoration: none;
    cursor: pointer;
    user-select: none;
    border: none;
    background: transparent;
}

.download-link:hover {
    opacity: 0.85;
}

.bottom-download-img {
    width: 2.4rem;
    filter: brightness(0) invert(1) opacity(0.85);
    transition: filter 0.3s, transform 0.3s;
}

.glass-card:hover .bottom-download-img {
    filter: brightness(0) invert(1);
    transform: scale(1.1);
}

@media (max-width: 576px) {
    .bottom-download-img {
        width: 1.8rem;
    }

    .glass-card {
        padding: 1rem 0.5rem;
        border-radius: 12px;
    }

    .download-card span {
        font-size: 0.78rem;
    }
}

/* ===== FOOTER ===== */

footer,
.footer-area {
    background-color: var(--bg-footer);
    color: var(--text-muted);
    border-top: 1px solid rgba(0, 240, 255, 0.06);
}

.footer-divider {
    border-color: rgba(255, 255, 255, 0.08);
}

.footer-title {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
}

.slug {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-area li {
    margin: 0;
}

.footer-area .nav-link {
    color: var(--text-muted);
    padding: 0.25rem 0;
    font-size: 0.9rem;
    transition: color 0.25s;
}

.footer-area .nav-link:hover {
    color: var(--neon-cyan);
}

.footer-area .btn {
    color: var(--text-muted);
    padding: 0;
}

.footer-area .btn:hover,
.footer-area .btn:hover .nav-link {
    color: var(--neon-cyan);
}

.icon-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--neon-cyan);
    font-size: 1.1rem;
    text-decoration: none;
    transition: background 0.25s, transform 0.25s;
}

.icon-link:hover {
    background: var(--neon-cyan-dim);
    transform: translateY(-2px);
    color: var(--neon-cyan);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 2rem;
}

.copyright-area span {
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* ===== ANIMATIONS ===== */

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-0.6rem); }
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.mockup-pc {
    animation: float 6s ease-in-out infinite;
}

.mockup-mobile {
    animation: float 5s ease-in-out 0.5s infinite;
}

.mockup-glow {
    animation: pulse-glow 4s ease-in-out infinite;
}

/* ===== SCROLLBAR ===== */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 240, 255, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 240, 255, 0.4);
}

/* ===== SELECTION ===== */

::selection {
    background: rgba(0, 240, 255, 0.25);
    color: #fff;
}