/* ============================================
   AI Landing Page — 未登录页样式
   只在 /ai-image-generation/ 未登录时加载
   ============================================ */

/* ---------- Hero ---------- */
.ai-landing-hero {
    max-width: 900px;
    margin: 40px auto 80px;
    padding: 0 20px;
    text-align: center;
}
.ai-landing-h1 {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.2;
    color: #111;
    margin: 0 0 16px 0;
    letter-spacing: -0.5px;
}
.ai-landing-sub {
    font-size: 17px;
    color: #666;
    line-height: 1.6;
    margin: 0 0 32px 0;
}
.ai-landing-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

/* ---------- 按钮（通用） ---------- */
.ai-landing-btn-primary {
    display: inline-block;
    background: #0073aa;
    color: #fff;
    text-decoration: none;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    transition: background 0.2s, transform 0.2s;
    box-shadow: 0 4px 12px rgba(0,115,170,0.2);
}
.ai-landing-btn-primary:hover {
    background: #005a8c;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(0,115,170,0.25);
}
.ai-landing-btn-secondary {
    display: inline-block;
    background: #fff;
    color: #0073aa;
    text-decoration: none;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    border: 2px solid #b0d4ea;
    transition: all 0.2s;
}
.ai-landing-btn-secondary:hover {
    background: #f0f8ff;
    border-color: #0073aa;
    transform: translateY(-1px);
}

/* ---------- Hero 示例图 ---------- */
.ai-landing-demo {
    max-width: 720px;
    margin: 0 auto;
}
.ai-landing-demo img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.12);
    transition: transform 0.3s ease;
    display: block;
}
.ai-landing-demo img:hover {
    transform: scale(1.02);
}
.ai-landing-demo-caption {
    font-size: 13px;
    color: #aaa;
    margin: 12px 0 0 0;
    text-align: center;
}

/* ---------- 卖点区块 ---------- */
.ai-landing-features {
    max-width: 1000px;
    margin: 0 auto 80px;
    padding: 0 20px;
    text-align: center;
}
.ai-landing-features-title {
    font-size: 26px;
    font-weight: 700;
    color: #111;
    margin: 0 0 40px 0;
}
.ai-landing-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.ai-landing-feature {
    background: #fff;
    border: 1px solid #f0f0f0;
    border-radius: 12px;
    padding: 32px 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ai-landing-feature:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}
.ai-landing-feature-icon {
    font-size: 36px;
    margin-bottom: 12px;
}
.ai-landing-feature h3 {
    font-size: 18px;
    font-weight: 700;
    color: #111;
    margin: 0 0 8px 0;
}
.ai-landing-feature p {
    font-size: 14px;
    color: #777;
    line-height: 1.5;
    margin: 0;
}
.ai-landing-disclaimer {
    font-size: 12px;
    color: #aaa;
    margin: 24px 0 0 0;
}

/* ---------- CTA 登录卡片 ---------- */
.ai-landing-cta {
    max-width: 600px;
    margin: 0 auto 80px;
    padding: 0 20px;
    text-align: center;
}
.ai-landing-cta h2 {
    font-size: 24px;
    font-weight: 700;
    color: #111;
    margin: 0 0 32px 0;
}
.ai-landing-login-card {
    background: #fff;
    border: 1px solid #f0f0f0;
    border-radius: 16px;
    padding: 40px 32px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
.ai-landing-lock {
    font-size: 40px;
    margin-bottom: 16px;
}
.ai-landing-login-text {
    font-size: 16px;
    color: #555;
    line-height: 1.6;
    margin: 0 0 24px 0;
}
.ai-landing-login-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}
.ai-landing-legal {
    font-size: 12px;
    color: #aaa;
    margin: 20px 0 0 0;
    line-height: 1.6;
}
.ai-landing-legal a {
    color: #0073aa;
    text-decoration: underline;
}

/* ---------- 响应式 ---------- */
@media (max-width: 921px) {
    .ai-landing-hero {
        margin: 20px auto 60px;
    }
    .ai-landing-h1 {
        font-size: 28px;
    }
    .ai-landing-sub {
        font-size: 15px;
    }
    .ai-landing-features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .ai-landing-features-title {
        font-size: 22px;
    }
    .ai-landing-cta h2 {
        font-size: 20px;
    }
    .ai-landing-login-card {
        padding: 32px 20px;
    }
}

@media (max-width: 420px) {
    .ai-landing-h1 {
        font-size: 24px;
    }
}