/* ===== 汽水音乐 - 黑胶唱片 · 霓虹音乐风 ===== */
:root{
    --bg:#0d0a14;
    --card:#151022;
    --card-2:#1a1430;
    --neon-pink:#ff2a6d;
    --neon-purple:#8b5cf6;
    --neon-cyan:#22d3ee;
    --neon-green:#20e040;
    --neon-mint:#20e0a0;
    --text:#efeaf5;
    --text-light:#a89bb8;
    --text-faint:#6b5f78;
    --border:#2a2240;
    --shadow:0 0 20px rgba(139,92,246,.08);
    --glow-pink:0 0 14px rgba(255,42,109,.6),0 0 40px rgba(255,42,109,.25);
    --glow-purple:0 0 14px rgba(139,92,246,.6),0 0 40px rgba(139,92,246,.25);
    --glow-cyan:0 0 12px rgba(34,211,238,.5),0 0 30px rgba(34,211,238,.2);
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);line-height:1.75;font-size:16px;overflow-x:hidden;background:
    url("../images/bg-vinyl.svg") no-repeat center/cover,
    linear-gradient(180deg,#0d0a14 0%,#0f0b18 100%);background-attachment:fixed}
a{text-decoration:none;color:var(--neon-cyan)}
a:hover{color:var(--neon-pink)}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.3;font-weight:900;color:var(--text)}
.container{max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:2}

/* ===== 顶栏 ===== */
.topbar{background:linear-gradient(90deg,#151022,#1a1430);color:var(--neon-cyan);padding:9px 0;text-align:center;font-size:13px;letter-spacing:1px;border-bottom:1px solid var(--border);position:relative;z-index:2}
.topbar a{color:var(--neon-pink);font-weight:700;text-decoration:underline}
.topbar a:hover{color:var(--neon-purple)}

/* ===== 导航 ===== */
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:rgba(13,10,20,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;width:100%}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:21px;font-weight:900;color:var(--text);letter-spacing:1px}
.nav-logo img.logo-mark{width:32px;height:32px;object-fit:contain;flex-shrink:0;filter:drop-shadow(0 0 6px rgba(139,92,246,.6))}
.nav-logo:hover{color:var(--neon-purple)}
.nav-links{display:flex;gap:4px;list-style:none;align-items:center}
.nav-links a{color:var(--text-light);font-weight:600;font-size:14px;padding:8px 14px;transition:all .18s;letter-spacing:.5px}
.nav-links a:hover{color:var(--neon-purple);text-shadow:0 0 8px rgba(139,92,246,.6)}
.nav-links .nav-cta{background:transparent;color:var(--neon-pink)!important;font-weight:800;border:1px solid var(--neon-pink);box-shadow:var(--glow-pink);border-radius:50px}
.nav-links .nav-cta:hover{background:rgba(255,42,109,.14);color:var(--neon-pink)!important}
.nav-toggle{display:none;font-size:24px;background:none;border:none;color:var(--text);cursor:pointer}

/* ===== Hero（左右分栏）===== */
.hero{padding:70px 0 54px;position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-badge{display:inline-block;color:var(--neon-purple);padding:5px 14px;font-size:12px;font-weight:800;letter-spacing:1px;border:1px solid var(--neon-purple);border-radius:50px;margin-bottom:18px;text-shadow:0 0 8px rgba(139,92,246,.6)}
.hero-text{text-align:left}
.hero-text h1{font-size:48px;font-weight:900;letter-spacing:1px;line-height:1.2;margin-bottom:16px}
.hero-text h1 .hl{background:linear-gradient(120deg,var(--neon-pink),var(--neon-purple),var(--neon-green));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-text .desc{font-size:16px;color:var(--text-light);margin:0 0 28px;max-width:560px}
.hero-stats{display:flex;justify-content:flex-start;gap:34px;margin-bottom:28px;flex-wrap:wrap}
.hero-stats .num{font-size:28px;font-weight:900;color:var(--neon-purple);text-shadow:var(--glow-purple);font-family:Consolas,Monaco,monospace}
.hero-stats .lbl{font-size:12px;color:var(--text-faint);letter-spacing:1px}
.hero-btns{display:flex;justify-content:flex-start;gap:14px;flex-wrap:wrap}
.btn-main{display:inline-block;background:linear-gradient(135deg,var(--neon-pink),var(--neon-purple));color:#fff;padding:15px 34px;font-weight:800;font-size:15px;letter-spacing:1px;transition:all .2s;box-shadow:var(--glow-pink);border-radius:50px}
.btn-main:hover{color:#fff;transform:translateY(-2px);box-shadow:0 0 22px rgba(255,42,109,.7),0 0 50px rgba(139,92,246,.35)}
.btn-outline{display:inline-block;padding:15px 34px;font-weight:800;font-size:15px;letter-spacing:1px;color:var(--neon-cyan);background:transparent;border:1px solid var(--neon-cyan);border-radius:50px;transition:all .2s}
.btn-outline:hover{background:rgba(34,211,238,.1);color:var(--neon-cyan)}

/* ===== 播放器卡片 ===== */
.player-wrap{max-width:520px;margin:0 auto;justify-self:center;width:100%}
.player-card{background:var(--card);padding:26px;border:1px solid var(--border);border-radius:20px;box-shadow:var(--glow-purple)}
.player-cover{display:flex;align-items:center;justify-content:center;height:220px;margin-bottom:20px;position:relative;overflow:hidden;border-radius:14px;background:radial-gradient(circle at 50% 50%,rgba(139,92,246,.14),rgba(13,10,20,.4) 70%)}
.player-cover .vinyl{width:190px;height:190px;border-radius:50%;background:url("../images/vinyl-green.svg") center/cover;animation:spin 9s linear infinite;box-shadow:0 0 30px rgba(32,224,64,.35)}
@keyframes spin{to{transform:rotate(360deg)}}
.player-title{font-size:18px;font-weight:800;text-align:center;margin-bottom:4px;color:var(--neon-purple);text-shadow:0 0 8px rgba(139,92,246,.5)}
.player-artist{font-size:13px;color:var(--text-light);text-align:center;margin-bottom:16px;letter-spacing:1px}
/* 波形 equalizer */
.player-eq{display:flex;justify-content:center;align-items:flex-end;gap:4px;height:26px;margin-bottom:14px}
.player-eq span{width:5px;border-radius:3px;background:linear-gradient(180deg,var(--neon-green),var(--neon-mint));animation:eq 1s ease-in-out infinite}
.player-eq span:nth-child(1){height:12px;animation-delay:0s}
.player-eq span:nth-child(2){height:22px;animation-delay:.15s}
.player-eq span:nth-child(3){height:8px;animation-delay:.3s}
.player-eq span:nth-child(4){height:18px;animation-delay:.45s}
.player-eq span:nth-child(5){height:24px;animation-delay:.6s}
.player-eq span:nth-child(6){height:10px;animation-delay:.75s}
.player-eq span:nth-child(7){height:16px;animation-delay:.9s}
@keyframes eq{0%,100%{transform:scaleY(.5)}50%{transform:scaleY(1)}}
.player-bar{height:5px;background:#1a1430;margin-bottom:8px;position:relative;border-radius:3px}
.player-bar .fill{position:absolute;left:0;top:0;height:100%;width:46%;border-radius:3px;background:linear-gradient(90deg,var(--neon-pink),var(--neon-purple),var(--neon-cyan));box-shadow:0 0 10px rgba(139,92,246,.6)}
.player-time{display:flex;justify-content:space-between;font-size:11px;color:var(--text-faint);margin-bottom:14px;font-family:Consolas,Monaco,monospace}
.player-ctrl{display:flex;justify-content:center;align-items:center;gap:22px}
.player-ctrl .p-btn{font-size:22px;color:var(--text-light);cursor:pointer}
.player-ctrl .p-play{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px;color:#fff;background:linear-gradient(135deg,var(--neon-pink),var(--neon-purple));box-shadow:var(--glow-pink)}

/* ===== 信任条 ===== */
.trust-bar{display:flex;justify-content:center;align-items:center;gap:44px;padding:30px 24px;background:var(--card);border-top:1px solid var(--border);border-bottom:1px solid var(--border);flex-wrap:wrap;position:relative;z-index:2}
.trust-item{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-light);font-weight:700;letter-spacing:.5px}
.trust-item .icon{font-size:22px;filter:drop-shadow(0 0 6px rgba(139,92,246,.4))}

/* ===== 通用区块 ===== */
.section{padding:72px 0}
.section-header{text-align:center;margin-bottom:44px}
.section-header h2{font-size:28px;font-weight:900;margin-bottom:12px;letter-spacing:1px}
.section-header p{color:var(--text-light);font-size:16px;max-width:640px;margin:0 auto}
.section-tag{display:inline-block;color:var(--neon-pink);font-size:13px;font-weight:800;letter-spacing:2px;margin-bottom:10px;text-shadow:0 0 8px rgba(255,42,109,.5)}

/* 功能卡片 */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.feature-card{background:var(--card);padding:26px;border:1px solid var(--border);border-radius:16px;transition:all .22s;position:relative}
.feature-card:hover{border-color:var(--neon-purple);box-shadow:var(--glow-purple);transform:translateY(-4px)}
.feature-card .f-icon{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px;background:rgba(139,92,246,.14);border:1px solid var(--neon-purple);color:var(--neon-purple)}
.feature-card h3{font-size:18px;margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-light)}
/* 横向居中排列 */
.feature-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:1080px;margin:0 auto}
.feature-row .feature-card{max-width:none}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.step-card{background:var(--card);padding:28px 24px;border:1px solid var(--border);border-radius:16px;position:relative}
.step-card .step-num{width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:20px;margin-bottom:16px;color:#06250e;background:linear-gradient(135deg,var(--neon-green),var(--neon-mint));font-family:Consolas,Monaco,monospace}
.step-card h3{font-size:17px;margin-bottom:8px}
.step-card p{font-size:14px;color:var(--text-light)}

/* 下载卡片 */
.dl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.dl-card{background:var(--card);padding:28px;text-align:center;border:1px solid var(--border);border-radius:16px;transition:all .22s}
.dl-card:hover{border-color:var(--neon-cyan);box-shadow:var(--glow-cyan);transform:translateY(-4px)}
.dl-card .dl-icon{font-size:44px;margin-bottom:12px;filter:drop-shadow(0 0 8px rgba(139,92,246,.4))}
.dl-card h3{font-size:18px;margin-bottom:6px}
.dl-card .ver{font-size:13px;color:var(--text-faint);margin-bottom:16px;font-family:Consolas,Monaco,monospace}
.dl-card .btn-main{padding:12px 28px;font-size:15px}

/* FAQ 列表 */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:14px;margin-bottom:14px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:18px 22px;font-weight:700;font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--neon-purple);font-weight:700;text-shadow:0 0 6px rgba(139,92,246,.5)}
.faq-item[open] summary::after{content:"−"}
.faq-item[open]{border-color:var(--neon-purple)}
.faq-item .faq-body{padding:0 22px 20px;color:var(--text-light);font-size:15px;border-top:1px dashed var(--border);padding-top:14px}

/* 文章 */
.article{max-width:760px;margin:0 auto;background:var(--card);padding:48px 56px;border:1px solid var(--border);border-radius:18px}
.article .art-meta{color:var(--text-faint);font-size:13px;margin-bottom:20px;display:flex;gap:16px;flex-wrap:wrap;font-family:Consolas,Monaco,monospace}
.article h1{font-size:30px;margin-bottom:18px;letter-spacing:.5px}
.article h2{font-size:22px;margin:28px 0 12px;color:var(--neon-purple)}
.article p{color:#c7bcd4;margin-bottom:16px;font-size:16px}
.article ul,.article ol{margin:0 0 16px 22px}
.article li{margin-bottom:8px;color:#c7bcd4}
.article strong{color:var(--neon-pink)}
.article .art-tip{background:rgba(139,92,246,.08);border-left:4px solid var(--neon-purple);padding:14px 18px;margin:18px 0;font-size:15px;border-radius:8px}

/* 面包屑 */
.breadcrumb{font-size:13px;color:var(--text-faint);margin-bottom:20px}
.breadcrumb a{color:var(--text-faint)}
.breadcrumb a:hover{color:var(--neon-purple)}

/* 404 */
.notfound{text-align:center;padding:90px 24px}
.notfound .code{font-size:110px;font-weight:900;background:linear-gradient(135deg,var(--neon-pink),var(--neon-purple),var(--neon-cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1;font-family:Consolas,Monaco,monospace}
.notfound h1{font-size:26px;margin:18px 0 12px}
.notfound p{color:var(--text-light);margin-bottom:28px}

/* ===== 页脚 ===== */
footer{background:#0b0812;padding:52px 0 0;border-top:1px solid var(--border);position:relative;z-index:2}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:36px}
.footer-grid h4{color:#fff;margin-bottom:16px;font-size:15px;letter-spacing:1px}
.footer-grid a{color:var(--text-light);display:block;margin-bottom:10px;font-size:14px}
.footer-grid a:hover{color:var(--neon-purple);text-shadow:0 0 8px rgba(139,92,246,.5)}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:12px;max-width:280px;color:var(--text-light)}
.footer-brand .logo{color:#fff;font-size:18px;font-weight:900;display:flex;align-items:center;gap:9px;letter-spacing:1px}
.footer-brand .logo img{width:32px;height:32px;object-fit:contain;filter:drop-shadow(0 0 6px rgba(139,92,246,.5))}
.footer-bottom{border-top:1px solid var(--border);padding:20px 0;text-align:center;font-size:13px;color:var(--text-faint)}
.footer-bottom a{color:var(--text-light)}

/* ===== 响应式 ===== */
@media(max-width:768px){
    .nav-links{display:none}
    .nav-toggle{display:block}
    .hero{padding:40px 0}
    .hero-grid{grid-template-columns:1fr;gap:32px}
    .hero-text h1{font-size:30px}
    .hero-stats{gap:22px}
    .trust-bar{gap:24px}
    .section{padding:48px 0}
    .section-header h2{font-size:24px}
    .article{padding:32px 24px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
    .feature-row{grid-template-columns:1fr}
    .player-cover{height:180px}
}
@media(max-width:480px){
    body{font-size:15px}
    .hero-text h1{font-size:25px}
    .hero-text .desc{font-size:15px}
    .btn-main,.btn-outline{padding:13px 26px;font-size:15px;margin-bottom:4px}
    .hero-btns{gap:10px}
    .hero-stats{gap:16px}
    .feature-grid,.dl-grid{grid-template-columns:1fr}
    .steps{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .section-header h2{font-size:22px}
    .article h1{font-size:24px}
    .notfound .code{font-size:72px}
    .nav{padding:12px 16px}
    .nav-inner{padding:0}
    .nav-logo{font-size:18px}
}