/**
 * 广告位动画效果 - 换 class 即可切换
 * 可选：banner--blink | banner--ripple | banner--pulse | banner--glow | banner--shake | banner--float | banner--spotlight
 */
.banner.banner--blink img,
.banner a.banner--blink img {
    -webkit-animation: banner-blink 1.5s ease-in-out infinite;
    animation: banner-blink 1.5s ease-in-out infinite;
}

@-webkit-keyframes banner-blink {
    0%, 100% {
        opacity: 1;
        -webkit-filter: brightness(1);
        filter: brightness(1);
    }
    50% {
        opacity: 0.65;
        -webkit-filter: brightness(1.25);
        filter: brightness(1.25);
    }
}

@keyframes banner-blink {
    0%, 100% {
        opacity: 1;
        filter: brightness(1);
    }
    50% {
        opacity: 0.65;
        filter: brightness(1.25);
    }
}

/* ========== 水波纹扫光：从左到右循环 ==========
 * 使用方式：把 class 改成 banner banner--ripple 即可
 */
.banner.banner--ripple a,
.banner a.banner--ripple {
    position: relative;
    overflow: hidden;
}

.banner.banner--ripple a::after,
.banner a.banner--ripple::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 45%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.2) 20%,
        rgba(255, 255, 255, 0.7) 50%,
        rgba(255, 255, 255, 0.2) 80%,
        transparent 100%
    );
    pointer-events: none;
    -webkit-animation: banner-ripple 2.5s ease-in-out infinite;
    animation: banner-ripple 2.5s ease-in-out infinite;
}

@-webkit-keyframes banner-ripple {
    0% { -webkit-transform: translateX(-100%); transform: translateX(-100%); }
    100% { -webkit-transform: translateX(350%); transform: translateX(350%); }
}

@keyframes banner-ripple {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(350%); }
}

/* ========== 呼吸缩放：轻微放大缩小 ==========
 * class: banner banner--pulse
 */
.banner.banner--pulse a,
.banner a.banner--pulse {
    display: inline-flex;
}
.banner.banner--pulse img,
.banner a.banner--pulse img {
    -webkit-animation: banner-pulse 2s ease-in-out infinite;
    animation: banner-pulse 2s ease-in-out infinite;
}
@-webkit-keyframes banner-pulse {
    0%, 100% { -webkit-transform: scale(1); }
    50% { -webkit-transform: scale(1.04); }
}
@keyframes banner-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.04); }
}

/* ========== 边缘发光：金色/橙色光晕脉动 ==========
 * class: banner banner--glow
 */
.banner.banner--glow a,
.banner a.banner--glow {
    position: relative;
    display: inline-flex;
}
.banner.banner--glow img,
.banner a.banner--glow img {
    -webkit-animation: banner-glow 1.8s ease-in-out infinite;
    animation: banner-glow 1.8s ease-in-out infinite;
}
@-webkit-keyframes banner-glow {
    0%, 100% {
        -webkit-filter: brightness(1);
        box-shadow: 0 0 8px rgba(255, 180, 0, 0.4), 0 0 20px rgba(255, 140, 0, 0.2);
    }
    50% {
        -webkit-filter: brightness(1.1);
        box-shadow: 0 0 18px rgba(255, 200, 0, 0.8), 0 0 35px rgba(255, 150, 0, 0.4);
    }
}
@keyframes banner-glow {
    0%, 100% {
        box-shadow: 0 0 8px rgba(255, 180, 0, 0.4), 0 0 20px rgba(255, 140, 0, 0.2);
        -webkit-filter: brightness(1);
        filter: brightness(1);
    }
    50% {
        box-shadow: 0 0 18px rgba(255, 200, 0, 0.8), 0 0 35px rgba(255, 150, 0, 0.4);
        -webkit-filter: brightness(1.1);
        filter: brightness(1.1);
    }
}

/* ========== 轻微晃动：左右小幅度抖动 ==========
 * class: banner banner--shake
 */
.banner.banner--shake img,
.banner a.banner--shake img {
    -webkit-animation: banner-shake 0.6s ease-in-out infinite;
    animation: banner-shake 0.6s ease-in-out infinite;
}
@-webkit-keyframes banner-shake {
    0%, 100% { -webkit-transform: translateX(0); }
    25% { -webkit-transform: translateX(-3px); }
    75% { -webkit-transform: translateX(3px); }
}
@keyframes banner-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-3px); }
    75% { transform: translateX(3px); }
}

/* ========== 组合：闪烁 + 晃动 同时生效 ==========
 * class: banner banner--blink banner--shake
 */
.banner.banner--blink.banner--shake img,
.banner a.banner--blink.banner--shake img {
    -webkit-animation: banner-blink 1.5s ease-in-out infinite, banner-shake 0.6s ease-in-out infinite;
    animation: banner-blink 1.5s ease-in-out infinite, banner-shake 0.6s ease-in-out infinite;
}

/* ========== 上下浮动：轻微悬浮感 ==========
 * class: banner banner--float
 */
.banner.banner--float img,
.banner a.banner--float img {
    -webkit-animation: banner-float 2.5s ease-in-out infinite;
    animation: banner-float 2.5s ease-in-out infinite;
}
@-webkit-keyframes banner-float {
    0%, 100% { -webkit-transform: translateY(0); }
    50% { -webkit-transform: translateY(-6px); }
}
@keyframes banner-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

/* ========== 聚光灯：圆形光斑从左扫到右 ==========
 * class: banner banner--spotlight
 */
.banner.banner--spotlight a,
.banner a.banner--spotlight {
    position: relative;
    overflow: hidden;
}
.banner.banner--spotlight a::after,
.banner a.banner--spotlight::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 80%;
    height: 120%;
    transform: translateY(-50%);
    background: radial-gradient(
        ellipse 60% 50% at center,
        rgba(255, 255, 255, 0.5) 0%,
        rgba(255, 255, 255, 0.15) 40%,
        transparent 70%
    );
    pointer-events: none;
    -webkit-animation: banner-spotlight 2.5s ease-in-out infinite;
    animation: banner-spotlight 2.5s ease-in-out infinite;
}
@keyframes banner-spotlight {
    0% { left: -80%; }
    100% { left: 100%; }
}