*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;min-height:100vh;display:flex;align-items:center;justify-content:center;color:#fff;overflow:hidden;position:relative}

/* 深邃蓝紫渐变背景 */
body::before{content:'';position:fixed;top:0;left:0;right:0;bottom:0;background:linear-gradient(160deg,#071a0d 0%,#0c2a15 25%,#0f3520 50%,#0a2812 75%,#061208 100%);z-index:-3}

/* 柔光装饰 */
body::after{content:'';position:fixed;top:-20%;right:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(61,186,106,0.25) 0%,transparent 70%);border-radius:50%;z-index:-2}
.glow-orb{position:fixed;bottom:-10%;left:-5%;width:400px;height:400px;background:radial-gradient(circle,rgba(61,186,106,0.15) 0%,transparent 70%);border-radius:50%;z-index:-2}
.glow-orb2{position:fixed;top:30%;left:50%;transform:translateX(-50%);width:600px;height:300px;background:radial-gradient(ellipse,rgba(45,165,93,0.12) 0%,transparent 70%);z-index:-2}

.cover{text-align:center;padding:40px 30px;max-width:420px;width:100%;position:relative;z-index:1}

/* 嫩芽图标 */
.logo-icon{margin-bottom:24px;animation:floatY 4s ease-in-out infinite}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.logo-icon svg{width:56px;height:72px;filter:drop-shadow(0 6px 24px rgba(255,200,60,0.35))}

/* NIANLUN 英文 */
.logo-en{font-size:13px;letter-spacing:8px;color:rgba(255,255,255,0.55);margin-bottom:20px;font-weight:300;text-transform:uppercase}

/* 年轮·晨露 标题 */
.logo-title{font-size:34px;font-weight:800;margin-bottom:12px;letter-spacing:4px;text-shadow:0 2px 20px rgba(61,186,106,0.4)}

/* AI双向共育 副标题 */
.logo-subtitle{font-size:18px;color:rgba(255,255,255,0.9);margin-bottom:18px;font-weight:500;letter-spacing:1px}

/* 公式标语 */
.logo-formula{font-size:13px;color:rgba(255,255,255,0.55);margin-bottom:44px;line-height:1.8;letter-spacing:0.5px}

/* 分隔点 */
.divider-dots{margin-bottom:36px;display:flex;justify-content:center;gap:6px}
.divider-dots span{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,0.25)}
.divider-dots span:nth-child(2){background:rgba(255,255,255,0.45);width:5px;height:5px}

/* 聆听按钮 */
.listen-btn{display:inline-flex;align-items:center;gap:10px;padding:13px 40px;background:rgba(61,186,106,0.18);border:1.5px solid rgba(61,186,106,0.4);border-radius:30px;color:rgba(255,255,255,0.9);font-size:15px;cursor:pointer;transition:all 0.35s;backdrop-filter:blur(12px);margin-bottom:22px;letter-spacing:1px}
.listen-btn:hover{background:rgba(61,186,106,0.28);border-color:rgba(61,186,106,0.6);transform:scale(1.02)}
.listen-btn.playing{background:rgba(61,186,106,0.32);border-color:rgba(61,186,106,0.7);box-shadow:0 0 24px rgba(61,186,106,0.2)}
.listen-btn .play-icon{font-size:13px;display:inline-block}

/* 进入按钮 */
.enter-btn{display:block;width:100%;padding:17px;background:linear-gradient(135deg,#3dba6a 0%,#4ed880 50%,#3dba6a 100%);background-size:200% 100%;border:none;border-radius:30px;color:#fff;font-size:17px;font-weight:700;cursor:pointer;transition:all 0.4s;box-shadow:0 8px 32px rgba(61,186,106,0.3),0 2px 8px rgba(0,0,0,0.2);letter-spacing:2px;margin-bottom:28px;position:relative;overflow:hidden}
.enter-btn::after{content:'';position:absolute;top:0;left:-100%;width:60%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.15),transparent);transition:left 0.6s}
.enter-btn:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(61,186,106,0.4),0 4px 12px rgba(0,0,0,0.15);background-position:100% 0}
.enter-btn:hover::after{left:120%}
.enter-btn:active{transform:translateY(0)}

/* 底部说明 */
.footer-text{font-size:13px;color:rgba(255,255,255,0.5);line-height:1.6;letter-spacing:0.5px}
</style>