/* ===== 汽水音乐 - 赛博朋克霓虹风 ===== */
:root{
    --bg:#07070d;
    --card:#0e0e17;
    --card-2:#141420;
    --neon-cyan:#00f0ff;
    --neon-magenta:#ff2a6d;
    --neon-green:#05ffa1;
    --neon-yellow:#fcee0a;
    --text:#d6dcff;
    --text-light:#8a92b0;
    --text-faint:#565d78;
    --border:#1c2340;
    --shadow:0 0 20px rgba(0,240,255,.06);
    --glow-cyan:0 0 12px rgba(0,240,255,.55),0 0 32px rgba(0,240,255,.22);
    --glow-magenta:0 0 12px rgba(255,42,109,.55),0 0 32px rgba(255,42,109,.22);
}
*{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:
    radial-gradient(720px 480px at 8% 6%,rgba(255,42,109,.14),transparent 60%),
    radial-gradient(680px 480px at 92% 4%,rgba(0,240,255,.14),transparent 60%),
    radial-gradient(800px 560px at 50% 112%,rgba(5,255,161,.08),transparent 62%),
    linear-gradient(180deg,#07070d 0%,#0a0a12 100%)}
/* 扫描线叠加 */
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:1;background:repeating-linear-gradient(0deg,rgba(0,0,0,.12) 0 1px,transparent 1px 3px);opacity:.4}
a{text-decoration:none;color:var(--neon-cyan)}
a:hover{color:var(--neon-magenta)}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.3;font-weight:800;color:var(--text)}
.container{max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:2}

/* 切角 */
.clip{clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px))}

/* ===== 顶栏 ===== */
.topbar{background:linear-gradient(90deg,#0a0a16,#120a1c);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-magenta);font-weight:700;text-decoration:underline}
.topbar a:hover{color:var(--neon-yellow)}

/* ===== 导航 ===== */
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:rgba(10,10,18,.92);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:20px;font-weight:800;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(0,240,255,.5))}
.nav-logo:hover{color:var(--neon-cyan)}
.nav-links{display:flex;gap:4px;list-style:none;align-items:center}
.nav-links a{color:var(--text-light);font-weight:500;font-size:14px;padding:8px 14px;transition:all .18s;letter-spacing:.5px}
.nav-links a:hover{color:var(--neon-cyan);text-shadow:0 0 8px rgba(0,240,255,.6)}
.nav-links .nav-cta{background:transparent;color:var(--neon-cyan)!important;font-weight:700;border:1px solid var(--neon-cyan);clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));box-shadow:var(--glow-cyan)}
.nav-links .nav-cta:hover{background:rgba(0,240,255,.12);color:var(--neon-cyan)!important}
.nav-toggle{display:none;font-size:24px;background:none;border:none;color:var(--text);cursor:pointer}

/* ===== Hero（左右分栏）===== */
.hero{padding:68px 0 52px;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-green);padding:5px 14px;font-size:12px;font-weight:700;letter-spacing:1px;border:1px solid var(--neon-green);clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,8px 100%,0 calc(100% - 8px));margin-bottom:18px;text-shadow:0 0 8px rgba(5,255,161,.6)}
.hero-text{text-align:left}
.hero-text h1{font-size:46px;font-weight:900;letter-spacing:1px;line-height:1.22;margin-bottom:16px}
.hero-text h1 .hl{color:var(--neon-cyan);text-shadow:var(--glow-cyan)}
.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-magenta);text-shadow:var(--glow-magenta);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:var(--neon-magenta);color:#fff;padding:15px 34px;font-weight:800;font-size:15px;letter-spacing:1px;transition:all .2s;box-shadow:var(--glow-magenta);clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px))}
.btn-main:hover{color:#fff;transform:translateY(-2px);box-shadow:0 0 20px rgba(255,42,109,.7),0 0 44px rgba(255,42,109,.3)}
.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);clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));transition:all .2s;box-shadow:var(--glow-cyan)}
.btn-outline:hover{background:rgba(0,240,255,.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(--neon-cyan);clip-path:polygon(0 0,calc(100% - 20px) 0,100% 20px,100% 100%,20px 100%,0 calc(100% - 20px));box-shadow:var(--glow-cyan)}
.player-cover{display:flex;align-items:center;justify-content:center;height:200px;margin-bottom:20px;background:linear-gradient(135deg,rgba(0,240,255,.15),rgba(255,42,109,.15),rgba(5,255,161,.12));border:1px solid var(--border);font-size:60px;position:relative;overflow:hidden}
.player-title{font-size:18px;font-weight:800;text-align:center;margin-bottom:4px;color:var(--neon-cyan);text-shadow:0 0 8px rgba(0,240,255,.5)}
.player-artist{font-size:13px;color:var(--text-light);text-align:center;margin-bottom:18px;letter-spacing:1px}
.player-bar{height:6px;background:#1a1a2a;margin-bottom:8px;position:relative;border:1px solid var(--border)}
.player-bar .fill{position:absolute;left:0;top:0;height:100%;width:42%;background:linear-gradient(90deg,var(--neon-magenta),var(--neon-cyan));box-shadow:0 0 10px rgba(255,42,109,.6)}
.player-time{display:flex;justify-content:space-between;font-size:11px;color:var(--text-faint);margin-bottom:16px;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:58px;height:58px;display:flex;align-items:center;justify-content:center;font-size:24px;color:#fff;background:var(--neon-magenta);clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));box-shadow:var(--glow-magenta)}

/* ===== 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:600;letter-spacing:.5px}
.trust-item .icon{font-size:22px;filter:drop-shadow(0 0 6px rgba(0,240,255,.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:800;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-magenta);font-size:13px;font-weight:700;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);clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));transition:all .22s;position:relative}
.feature-card:hover{border-color:var(--neon-cyan);box-shadow:var(--glow-cyan);transform:translateY(-4px)}
.feature-card .f-icon{width:52px;height:52px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px;background:rgba(0,240,255,.08);border:1px solid var(--neon-cyan);color:var(--neon-cyan);clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,8px 100%,0 calc(100% - 8px))}
.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);clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));position:relative}
.step-card .step-num{width:46px;height:46px;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:20px;margin-bottom:16px;color:#0a0a0f;background:var(--neon-cyan);clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,8px 100%,0 calc(100% - 8px));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);clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));transition:all .22s}
.dl-card:hover{border-color:var(--neon-magenta);box-shadow:var(--glow-magenta);transform:translateY(-4px)}
.dl-card .dl-icon{font-size:44px;margin-bottom:12px;filter:drop-shadow(0 0 8px rgba(0,240,255,.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);margin-bottom:14px;overflow:hidden;clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px))}
.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-cyan);font-weight:700;text-shadow:0 0 6px rgba(0,240,255,.5)}
.faq-item[open] summary::after{content:"−"}
.faq-item[open]{border-color:var(--neon-cyan)}
.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);clip-path:polygon(0 0,calc(100% - 20px) 0,100% 20px,100% 100%,20px 100%,0 calc(100% - 20px))}
.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-cyan)}
.article p{color:#b8bfd6;margin-bottom:16px;font-size:16px}
.article ul,.article ol{margin:0 0 16px 22px}
.article li{margin-bottom:8px;color:#b8bfd6}
.article strong{color:var(--neon-magenta)}
.article .art-tip{background:rgba(0,240,255,.06);border-left:4px solid var(--neon-cyan);padding:14px 18px;margin:18px 0;font-size:15px;clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px))}

/* 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-cyan)}

/* 404 */
.notfound{text-align:center;padding:90px 24px}
.notfound .code{font-size:110px;font-weight:900;color:var(--neon-cyan);text-shadow:var(--glow-cyan);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:#08080f;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-cyan);text-shadow:0 0 8px rgba(0,240,255,.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:800;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(0,240,255,.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:160px}
}
@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}
}