/* ===== Hero (下載頁特定) ===== */
.hero {
    height: 70vh;
}

.hero video {
    filter: brightness(.35) contrast(1.1) saturate(.7);
}

.hero-overlay {
    background: linear-gradient(
        to bottom,
        rgba(0,0,0,.7),
        rgba(0,0,0,.3),
        rgba(0,0,0,.95)
    );
}

.hero h1 {
    font-size: 6rem;
    margin-top: 20px;
    margin-bottom: 20px;
    letter-spacing: 16px;
    text-shadow: 0 0 25px rgba(255,255,255,.15);
}

.hero p {
    color: #CFCFCF;
    letter-spacing: 2px;
}

/* ===== Sections ===== */
.download-section,
.spec-section {
    padding: 120px 10%;
}

.download-section h2,
.spec-section h2 {
    font-size: 4rem;
    margin-top: 20px;
    margin-bottom: 30px;
    letter-spacing: 8px;
}

.download-description {
    color: #CFCFCF;
    max-width: 800px;
    line-height: 2;
    margin-bottom: 60px;
}

/* ===== Platform ===== */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.platform-card {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 24px;
    padding: 50px 40px;
    transition: .4s;
}

.platform-card:hover {
    border-color: #00A3FF;
}

.platform-card h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.platform-card p {
    color: #BFBFBF;
    margin-bottom: 40px;
    line-height: 1.8;
}

/* ===== Buttons ===== */
.download-btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 999px;
    background: #0084FF;
    color: white;
    text-decoration: none;
    transition: .3s;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 25px rgba(0,132,255,.45);
}

/* ===== Specs ===== */
.spec-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.spec-card {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 24px;
    padding: 40px;
}

.spec-card h3 {
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.spec-card ul {
    list-style: none;
}

.spec-card li {
    margin-bottom: 18px;
    color: #CFCFCF;
}

/* ===== Download Mobile RWD ===== */
@media(max-width: 768px) {
    .hero {
        height: 60vh;
    }

    .hero h1 {
        font-size: 3rem;
        letter-spacing: 8px;
    }

    .download-section h2,
    .spec-section h2 {
        font-size: 2.5rem;
    }

    .platform-grid,
    .spec-grid {
        grid-template-columns: 1fr;
    }
}