/* === Page Header === */
.page-hero {
    background: linear-gradient(135deg, #0f0e24 0%, #1b1650 40%, #0e2448 75%, #0c1a30 100%);
    padding: 180px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(ellipse at 28% 48%, rgba(167, 139, 250, 0.26) 0%, transparent 52%),
        radial-gradient(ellipse at 72% 22%, rgba(96, 165, 250, 0.2) 0%, transparent 48%),
        radial-gradient(ellipse at 50% 85%, rgba(99, 102, 241, 0.12) 0%, transparent 42%);
}
.page-hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%; height: 140px;
    background: linear-gradient(to bottom, transparent 0%, rgba(12, 18, 32, 0.5) 100%);
    z-index: 0;
    pointer-events: none;
}
.page-hero-content { position: relative; z-index: 1; }
.page-hero h1 {
    color: #ffffff;
    font-size: 3.8rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 20px;
    line-height: 1.1;
}
.page-hero p {
    color: rgba(255,255,255,0.72);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}
.hero-badges {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}
.hero-badge {
    padding: 6px 16px;
    border-radius: 30px;
    border: 1px solid rgba(167, 139, 250, 0.22);
    color: rgba(255,255,255,0.72);
    background: rgba(255,255,255,0.04);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    backdrop-filter: blur(4px);
}

/* === Platform Tabs === */
.platform-section { padding: 80px 0 140px; background: var(--color-bg-light); }
.tabs-wrapper {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}
.tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    border-radius: 50px;
    border: 1.5px solid var(--color-border);
    background: var(--color-white);
    color: var(--color-grey-dark);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.tab-btn i { font-size: 1.1rem; }
.tab-btn:hover {
    border-color: var(--color-brand);
    color: var(--color-brand);
    transform: translateY(-2px);
}
.tab-btn.active {
    background: linear-gradient(135deg, var(--color-brand-dark) 0%, var(--color-brand) 100%);
    color: var(--color-white);
    border-color: var(--color-brand);
    box-shadow: var(--shadow-brand);
}

/* === Tab Content === */
.tab-pane { display: none; }
.tab-pane.active { display: block; }

.platform-intro {
    text-align: center;
    margin-bottom: 56px;
}
.platform-intro h2 {
    font-size: 2.4rem;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}
.platform-intro p {
    font-size: 1.1rem;
    color: var(--color-grey-dark);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.7;
}

/* === Client Cards Grid === */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.client-card {
    background: var(--color-white);
    border: 1.5px solid var(--color-border);
    border-radius: 24px;
    padding: 40px 36px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}
.client-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card);
    border-color: rgba(0,0,0,0.12);
}
.client-card.recommended {
    border-color: var(--color-brand);
    position: relative;
}
.recommend-badge {
    position: absolute;
    top: -14px;
    left: 36px;
    background: linear-gradient(135deg, var(--color-brand-dark) 0%, var(--color-brand) 100%);
    color: var(--color-white);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.8px;
    text-transform: uppercase;
}
.client-icon {
    width: 64px;
    height: 64px;
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--color-black);
    margin-bottom: 24px;
    flex-shrink: 0;
}
.client-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}
.client-version {
    font-size: 0.8rem;
    color: var(--color-grey-light);
    font-family: var(--font-en);
    margin-bottom: 16px;
    font-weight: 500;
}
.client-desc {
    font-size: 0.95rem;
    color: var(--color-grey-dark);
    line-height: 1.7;
    margin-bottom: 28px;
    flex: 1;
}
.client-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}
.client-tag {
    padding: 4px 12px;
    border-radius: 20px;
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    font-size: 0.75rem;
    color: var(--color-grey-dark);
    font-weight: 500;
}
.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 14px 24px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--color-brand-dark) 0%, var(--color-brand) 100%);
    color: var(--color-white);
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
    margin-bottom: 12px;
}
.download-btn:hover {
    background: linear-gradient(135deg, var(--color-brand-deeper) 0%, var(--color-brand-dark) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-brand);
    color: var(--color-white);
}
.download-btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 11px 24px;
    border-radius: 14px;
    background: transparent;
    color: var(--color-grey-dark);
    border: 1.5px solid var(--color-border);
    font-size: 0.88rem;
    font-weight: 500;
    transition: var(--transition);
    text-align: center;
    margin-bottom: 8px;
}
.download-btn-secondary:hover {
    border-color: var(--color-brand);
    color: var(--color-brand);
}

/* === GitHub Banner === */
.github-banner {
    background: linear-gradient(135deg, #0f0e24 0%, #1b1650 60%, #0e2448 100%);
    border-radius: 24px;
    padding: 48px 56px;
    margin-top: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}
.github-banner-text h3 {
    color: var(--color-white);
    font-size: 1.6rem;
    letter-spacing: -0.02em;
    margin-bottom: 10px;
}
.github-banner-text p {
    color: rgba(255,255,255,0.5);
    font-size: 1rem;
}
.github-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--color-white);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    white-space: nowrap;
}
.github-btn:hover {
    background: var(--color-white);
    color: var(--color-black);
    transform: translateY(-2px);
}

/* === Notice Section === */
.notice-section { padding: 80px 0; background: var(--color-white); }
.notice-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.notice-card {
    padding: 40px;
    border: 1.5px solid var(--color-border);
    border-radius: 20px;
    transition: var(--transition);
}
.notice-card:hover { box-shadow: var(--shadow-card); transform: translateY(-4px); }
.notice-icon {
    width: 52px; height: 52px;
    background: var(--color-bg-light);
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem;
    color: var(--color-black);
    margin-bottom: 20px;
}
.notice-card h3 { font-size: 1.15rem; margin-bottom: 12px; letter-spacing: -0.02em; }
.notice-card p { font-size: 0.95rem; color: var(--color-grey-dark); line-height: 1.7; }

/* === Download FAQ === */
.download-faq { padding: 80px 0 120px; background: var(--color-bg-light); }

/* === iOS Special === */
.appstore-card {
    background: linear-gradient(135deg, var(--color-brand-deeper) 0%, var(--color-brand-dark) 50%, var(--color-brand) 100%);
    border-radius: 24px;
    padding: 48px;
    display: flex;
    gap: 32px;
    align-items: center;
    margin-bottom: 28px;
    border: 1px solid rgba(255,255,255,0.12);
    box-shadow: 0 8px 32px rgba(79, 70, 229, 0.35);
}
.appstore-icon {
    width: 80px; height: 80px;
    background: rgba(255,255,255,0.15);
    border-radius: 20px;
    display: flex; align-items: center; justify-content: center;
    font-size: 2.4rem;
    color: var(--color-white);
    flex-shrink: 0;
}
.appstore-content { flex: 1; }
.appstore-content h3 {
    color: var(--color-white);
    font-size: 1.4rem;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}
.appstore-content p {
    color: rgba(255,255,255,0.75);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
}
.appstore-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    background: var(--color-white);
    color: var(--color-brand-deeper);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}
.appstore-btn:hover {
    background: rgba(255,255,255,0.9);
    transform: translateY(-2px);
    color: var(--color-brand-deeper);
}

/* === Responsive === */
@media (max-width: 1024px) {
    .clients-grid { grid-template-columns: repeat(2, 1fr); }
    .notice-grid { grid-template-columns: repeat(2, 1fr); }
    .page-hero h1 { font-size: 2.8rem; }
}
@media (max-width: 768px) {
    .clients-grid { grid-template-columns: 1fr; }
    .notice-grid { grid-template-columns: 1fr; }
    .page-hero h1 { font-size: 2.2rem; }
    .page-hero { padding: 140px 0 80px; }
    .github-banner { flex-direction: column; text-align: center; padding: 36px 28px; }
    .platform-intro h2 { font-size: 1.8rem; }
    .appstore-card { flex-direction: column; padding: 32px; }
}