/* ============ 基础与设计变量 ============ */
:root{
  --bg-0:#05090F;
  --bg-1:#0A111F;
  --bg-2:#0E1730;
  --bg-3:#16233E;
  --line:rgba(150,184,226,.14);
  --line-2:rgba(150,184,226,.28);
  --ink:#EAF2FF;
  --ink-2:#B9C7DD;
  --ink-3:#7F90AC;
  --cyan:#35D6F2;
  --cyan-deep:#0E97B8;
  --amber:#FFB84D;
  --red:#FF5C6A;
  --green:#3ED59A;
  --font-d:'Outfit','Noto Sans SC',system-ui,-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Noto Sans SC',system-ui,-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Consolas,'Courier New',monospace;
  --wrap:1200px;
  --r:18px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg-0);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:rgba(53,214,242,.28);color:#fff}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 32px}

/* ============ 通用组件 ============ */
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;
  color:var(--cyan);text-transform:uppercase;
}
.kicker::before{content:"";width:26px;height:1px;background:var(--cyan);opacity:.7}
.sec-head{max-width:640px;margin:0 auto 56px;text-align:center}
.sec-head h2{
  font-family:var(--font-d);font-weight:800;
  font-size:clamp(28px,4vw,44px);line-height:1.2;letter-spacing:.01em;margin-top:14px;
}
.sec-head p{color:var(--ink-2);margin-top:14px;font-size:15.5px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--font-d);font-weight:600;font-size:15px;
  padding:14px 26px;border-radius:12px;border:1px solid transparent;
  cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn svg{width:18px;height:18px}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,#22c6e8,#0e97b8);color:#04131b;box-shadow:0 10px 30px -8px rgba(35,199,232,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 38px -8px rgba(35,199,232,.7)}
.btn-ghost{background:rgba(148,184,226,.06);border-color:var(--line-2);color:var(--ink);backdrop-filter:blur(6px)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn-amber{background:linear-gradient(135deg,#ffc96b,#f5a623);color:#241503;box-shadow:0 10px 30px -8px rgba(255,184,77,.5)}
.btn-amber:hover{transform:translateY(-2px);box-shadow:0 16px 38px -8px rgba(255,184,77,.65)}
.btn-lg{padding:17px 34px;font-size:16px;border-radius:14px}
.btn-sm{padding:9px 16px;font-size:13px;border-radius:9px}

/* ON AIR 徽标 */
.onair{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.28em;
  color:var(--red);padding:6px 14px;border:1px solid rgba(255,92,106,.35);
  border-radius:999px;background:rgba(255,92,106,.08);
}
.onair .dot{width:7px;height:7px;border-radius:50%;background:var(--red);box-shadow:0 0 0 0 rgba(255,92,106,.6);animation:onair 1.8s ease-out infinite}
@keyframes onair{0%{box-shadow:0 0 0 0 rgba(255,92,106,.55)}70%{box-shadow:0 0 0 9px rgba(255,92,106,0)}100%{box-shadow:0 0 0 0 rgba(255,92,106,0)}}

/* 均衡器 */
.eq{display:flex;align-items:flex-end;gap:3px;height:22px}
.eq i{width:3px;border-radius:2px;background:linear-gradient(to top,var(--cyan-deep),var(--cyan));animation:eqb 1.15s ease-in-out infinite}
.eq i:nth-child(2){animation-delay:.12s}
.eq i:nth-child(3){animation-delay:.28s}
.eq i:nth-child(4){animation-delay:.05s}
.eq i:nth-child(5){animation-delay:.38s}
.eq i:nth-child(6){animation-delay:.2s}
.eq i:nth-child(7){animation-delay:.45s}
@keyframes eqb{0%,100%{height:22%}50%{height:100%}}

/* 滚动显现 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ============ 顶部导航 ============ */
header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  border-bottom:1px solid transparent;transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
header.scrolled{background:rgba(6,11,20,.82);backdrop-filter:blur(14px);border-bottom-color:var(--line)}
.nav{height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px}
.brand .logo{
  width:42px;height:42px;border-radius:12px;flex:none;
  background:linear-gradient(135deg,#1b3a5f,#0e1730);
  border:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px -6px rgba(0,0,0,.6);
}
.brand .name{font-family:var(--font-d);font-weight:700;font-size:17px;letter-spacing:.01em;line-height:1.2}
.brand .name small{display:block;font-family:var(--font-body);font-weight:400;font-size:11px;color:var(--ink-3);letter-spacing:.18em}
.nav-links{display:flex;align-items:center;gap:30px;list-style:none}
.nav-links a{font-size:14.5px;color:var(--ink-2);transition:color .2s}
.nav-links a:hover{color:var(--cyan)}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;background:none;border:1px solid var(--line-2);border-radius:9px;width:42px;height:42px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.burger span{display:block;width:18px;height:2px;background:var(--ink);transition:.25s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{position:relative;padding:170px 0 90px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:-2;
  background:radial-gradient(1200px 700px at 78% 18%,rgba(35,199,232,.16),transparent 60%),
             radial-gradient(900px 600px at 8% 82%,rgba(14,151,184,.14),transparent 55%);}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.32;filter:saturate(1.05)}
.hero-grid{position:absolute;inset:0;z-index:-1;opacity:.5;
  background-image:linear-gradient(rgba(148,184,226,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(148,184,226,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse at 60% 30%,#000 30%,transparent 75%);
          mask-image:radial-gradient(ellipse at 60% 30%,#000 30%,transparent 75%);
}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.hero-eyebrow{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.hero-eyebrow .ver{font-family:var(--font-mono);font-size:12px;color:var(--ink-3);letter-spacing:.1em}
.hero h1{
  font-family:var(--font-d);font-weight:800;
  font-size:clamp(38px,5.4vw,64px);line-height:1.12;letter-spacing:.005em;
  background:linear-gradient(180deg,#ffffff 30%,#bcd4ee);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero h1 em{font-style:normal;background:linear-gradient(135deg,var(--cyan),#6fe8ff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{margin-top:22px;max-width:560px;color:var(--ink-2);font-size:16.5px}
.hero-sub b{color:var(--ink);font-weight:600}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero-stats{display:flex;gap:0;margin-top:52px;border:1px solid var(--line);border-radius:var(--r);background:rgba(10,17,31,.55);backdrop-filter:blur(8px);overflow:hidden}
.hero-stats .st{flex:1;padding:22px 24px;border-right:1px solid var(--line)}
.hero-stats .st:last-child{border-right:none}
.hero-stats .num{font-family:var(--font-mono);font-weight:700;font-size:26px;color:var(--cyan);line-height:1.1}
.hero-stats .num.amber{color:var(--amber)}
.hero-stats .lbl{font-size:12.5px;color:var(--ink-3);margin-top:4px}

.hero-visual{position:relative}
.glow{position:absolute;inset:-40px -30px;z-index:-1;border-radius:30px;background:radial-gradient(60% 60% at 50% 40%,rgba(35,199,232,.28),transparent 70%);filter:blur(8px)}
.win{
  border:1px solid var(--line-2);border-radius:16px;overflow:hidden;
  background:rgba(12,20,36,.9);backdrop-filter:blur(10px);
  box-shadow:0 40px 90px -30px rgba(0,0,0,.85);
}
.win-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);background:rgba(9,15,28,.9)}
.win-dots{display:flex;gap:6px}
.win-dots i{width:10px;height:10px;border-radius:50%;background:#2a3a58}
.win-dots i:first-child{background:#ff5f57}
.win-dots i:nth-child(2){background:#febc2e}
.win-dots i:nth-child(3){background:#28c840}
.win-url{
  flex:1;display:flex;align-items:center;gap:8px;
  background:rgba(148,184,226,.07);border:1px solid var(--line);
  border-radius:8px;padding:5px 12px;font-family:var(--font-mono);font-size:11.5px;color:var(--ink-3);
}
.win-url svg{width:12px;height:12px;color:var(--green)}
.win-body{position:relative}
.win-body img{width:100%;height:auto;display:block}
.win-chip{
  position:absolute;display:flex;align-items:center;gap:8px;
  background:rgba(8,14,26,.85);border:1px solid var(--line-2);backdrop-filter:blur(8px);
  border-radius:12px;padding:10px 14px;box-shadow:0 16px 40px -14px rgba(0,0,0,.8);
  font-size:12.5px;color:var(--ink-2);
}
.win-chip b{color:var(--ink);font-weight:600}
.win-chip svg{width:16px;height:16px;color:var(--cyan)}
.chip-1{top:-18px;right:-10px}
.chip-2{bottom:26px;left:-22px}
.chip-2 svg{color:var(--amber)}

/* ============ 跑马灯 ============ */
.ticker{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(8,14,26,.6);overflow:hidden;position:relative}
.ticker-track{display:flex;gap:0;width:max-content;animation:ticker 42s linear infinite}
.ticker:hover .ticker-track{animation-play-state:paused}
.ticker .tk{display:flex;align-items:center;gap:26px;padding:16px 26px;white-space:nowrap;font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;color:var(--ink-3)}
.ticker .tk b{color:var(--ink-2);font-weight:500}
.ticker .sep{color:var(--cyan);opacity:.6}
@keyframes ticker{to{transform:translateX(-50%)}}

/* ============ 通用章节 ============ */
section{padding:104px 0;position:relative}
.sec-tag{position:absolute;top:88px;right:4%;font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;color:rgba(148,184,226,.16);writing-mode:vertical-rl;pointer-events:none}

/* ============ 功能特性 ============ */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat{
  position:relative;border:1px solid var(--line);border-radius:var(--r);
  background:linear-gradient(180deg,rgba(14,23,48,.6),rgba(10,17,31,.4));
  padding:30px 28px;overflow:hidden;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.feat::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--cyan),transparent);opacity:0;transition:opacity .3s}
.feat:hover{transform:translateY(-6px);border-color:var(--line-2);box-shadow:0 30px 60px -30px rgba(0,0,0,.8)}
.feat:hover::before{opacity:1}
.feat .ico{width:50px;height:50px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:rgba(53,214,242,.09);border:1px solid rgba(53,214,242,.22);color:var(--cyan);margin-bottom:20px}
.feat .ico svg{width:24px;height:24px}
.feat .no{position:absolute;top:22px;right:24px;font-family:var(--font-mono);font-size:13px;color:rgba(148,184,226,.3)}
.feat h3{font-family:var(--font-d);font-size:19px;font-weight:700;margin-bottom:10px}
.feat p{font-size:14px;color:var(--ink-2)}
.feat ul{list-style:none;margin-top:16px;display:grid;gap:8px}
.feat ul li{display:flex;gap:9px;align-items:flex-start;font-size:13px;color:var(--ink-3)}
.feat ul li svg{width:14px;height:14px;color:var(--cyan);flex:none;margin-top:3px}

/* ============ 引擎 ============ */
.engine-sec{background:linear-gradient(180deg,rgba(8,14,26,.4),transparent)}
.eng-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.eng{position:relative;border:1px solid var(--line);border-radius:var(--r);padding:30px 28px;background:rgba(14,23,48,.45);transition:transform .25s,border-color .25s}
.eng:hover{transform:translateY(-5px);border-color:rgba(53,214,242,.4)}
.eng.lead{border-color:rgba(255,184,77,.35);background:linear-gradient(180deg,rgba(255,184,77,.07),rgba(14,23,48,.45))}
.eng .badge{position:absolute;top:-12px;right:22px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;padding:5px 11px;border-radius:999px}
.eng .badge.hot{background:linear-gradient(135deg,#ffc96b,#f5a623);color:#241503;box-shadow:0 8px 20px -6px rgba(255,184,77,.6)}
.eng .badge.def{background:rgba(53,214,242,.12);color:var(--cyan);border:1px solid rgba(53,214,242,.3)}
.eng .logo-row{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.eng .logo{width:44px;height:44px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-family:var(--font-d);font-weight:800;font-size:16px;color:#fff;flex:none}
.eng .logo.tx{background:linear-gradient(135deg,#3f9cff,#1f6ff0)}
.eng .logo.bd{background:linear-gradient(135deg,#4b7bff,#2346d6)}
.eng .logo.xf{background:linear-gradient(135deg,#ff8a3d,#f0561d)}
.eng h3{font-family:var(--font-d);font-size:20px;font-weight:700}
.eng .tagline{font-size:12.5px;color:var(--ink-3);margin-top:2px;letter-spacing:.05em}
.eng p{font-size:14px;color:var(--ink-2);margin-top:14px}
.eng .eng-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.eng .eng-meta span{font-family:var(--font-mono);font-size:11.5px;color:var(--ink-2);border:1px solid var(--line);background:rgba(148,184,226,.05);padding:4px 10px;border-radius:7px}
.eng.lead .eng-meta span{color:var(--amber);border-color:rgba(255,184,77,.3)}

/* ============ 场景 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene{border:1px solid var(--line);border-radius:var(--r);padding:30px 28px;background:rgba(14,23,48,.4);display:flex;gap:18px;align-items:flex-start;transition:transform .25s,border-color .25s}
.scene:hover{transform:translateY(-5px);border-color:var(--line-2)}
.scene .ico{width:46px;height:46px;flex:none;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(53,214,242,.08);border:1px solid rgba(53,214,242,.2);color:var(--cyan)}
.scene .ico svg{width:22px;height:22px}
.scene h3{font-family:var(--font-d);font-size:17px;font-weight:700;margin-bottom:6px}
.scene p{font-size:13.5px;color:var(--ink-2)}

/* ============ 界面预览 ============ */
.preview-sec{background:linear-gradient(180deg,transparent,rgba(8,14,26,.55))}
.preview-wrap{display:grid;grid-template-columns:320px 1fr;gap:30px;align-items:start}
.pv-tabs{display:flex;flex-direction:column;gap:8px}
.pv-tab{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:rgba(14,23,48,.4);border:1px solid var(--line);border-radius:12px;padding:14px 16px;color:var(--ink-2);cursor:pointer;font-family:var(--font-body);font-size:14px;transition:.2s}
.pv-tab .idx{font-family:var(--font-mono);font-size:11.5px;color:var(--ink-3);width:22px}
.pv-tab svg{width:17px;height:17px;color:var(--ink-3);transition:.2s}
.pv-tab:hover{border-color:var(--line-2);color:var(--ink)}
.pv-tab.on{background:rgba(53,214,242,.08);border-color:rgba(53,214,242,.4);color:var(--ink)}
.pv-tab.on svg,.pv-tab.on .idx{color:var(--cyan)}
.pv-stage .win .win-body img{transition:opacity .35s ease}
.pv-caption{display:flex;align-items:center;justify-content:space-between;margin-top:14px;font-size:13px;color:var(--ink-3)}
.pv-caption b{color:var(--ink);font-weight:600;font-family:var(--font-d)}
.pv-caption .eq{height:16px}

/* ============ 下载中心 ============ */
.dl-sec{background:radial-gradient(1100px 500px at 50% 0%,rgba(35,199,232,.1),transparent 65%),var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:980px;margin:0 auto}
.dl-card{position:relative;border-radius:22px;padding:38px 34px;overflow:hidden;background:linear-gradient(180deg,rgba(16,28,52,.9),rgba(10,17,31,.92));border:1px solid var(--line-2);box-shadow:0 40px 80px -40px rgba(0,0,0,.9)}
.dl-card.main{border-color:rgba(53,214,242,.45)}
.dl-card.main::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(500px 220px at 80% 0%,rgba(53,214,242,.14),transparent 60%)}
.dl-card.win7{border-color:rgba(255,184,77,.3)}
.dl-card.win7::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(500px 220px at 80% 0%,rgba(255,184,77,.1),transparent 60%)}
.dl-ribbon{position:absolute;top:22px;right:-42px;transform:rotate(45deg);width:160px;text-align:center;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;padding:7px 0;color:#04131b;background:linear-gradient(135deg,#22c6e8,#0e97b8)}
.dl-card .os{display:flex;align-items:center;gap:16px;margin-bottom:20px}
.dl-card .os .win-logo{width:60px;height:60px;border-radius:15px;display:flex;align-items:center;justify-content:center;flex:none}
.dl-card.main .win-logo{background:linear-gradient(135deg,#2a6df0,#1550c8);box-shadow:0 12px 28px -10px rgba(42,109,240,.6)}
.dl-card.win7 .win-logo{background:linear-gradient(135deg,#e3c45a,#c9a227);box-shadow:0 12px 28px -10px rgba(201,162,39,.5)}
.dl-card .os .win-logo svg{width:30px;height:30px;color:#fff}
.dl-card h3{font-family:var(--font-d);font-size:22px;font-weight:700}
.dl-card .os .sub{font-size:12.5px;color:var(--ink-3);margin-top:2px}
.dl-spec{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0 8px}
.dl-spec .row{border:1px solid var(--line);border-radius:11px;padding:12px 14px;background:rgba(148,184,226,.04)}
.dl-spec .row .k{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;color:var(--ink-3);text-transform:uppercase}
.dl-spec .row .v{font-size:13.5px;color:var(--ink);margin-top:3px;font-weight:500}
.dl-spec .row .v.mono{font-family:var(--font-mono);font-size:12.5px;color:var(--cyan)}
.dl-card .dl-note{font-size:12.5px;color:var(--ink-3);margin-top:16px;display:flex;align-items:center;gap:8px}
.dl-card .dl-note svg{width:14px;height:14px;color:var(--green);flex:none}
.dl-btn-row{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap}
.dl-btn-row.two .btn{flex:1;min-width:140px}
.dl-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:980px;margin:56px auto 0}
.dl-step{display:flex;gap:16px;align-items:flex-start}
.dl-step .n{width:40px;height:40px;flex:none;border-radius:11px;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-weight:700;font-size:15px;color:var(--cyan);background:rgba(53,214,242,.08);border:1px solid rgba(53,214,242,.25)}
.dl-step h4{font-family:var(--font-d);font-size:15px;font-weight:600;margin-bottom:4px}
.dl-step p{font-size:12.5px;color:var(--ink-3)}

/* ============ FAQ ============ */
.faq{max-width:820px;margin:0 auto}
.faq details{border:1px solid var(--line);border-radius:14px;margin-bottom:12px;background:rgba(14,23,48,.4);overflow:hidden;transition:border-color .25s}
.faq details[open]{border-color:rgba(53,214,242,.35)}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;font-family:var(--font-d);font-weight:600;font-size:16px;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary .pm{width:30px;height:30px;flex:none;border-radius:9px;border:1px solid var(--line-2);display:flex;align-items:center;justify-content:center;transition:transform .3s,background .3s}
.faq summary .pm svg{width:14px;height:14px;color:var(--cyan)}
.faq details[open] summary .pm{transform:rotate(45deg);background:rgba(53,214,242,.1)}
.faq .ans{padding:0 24px 22px;font-size:14.5px;color:var(--ink-2)}

/* ============ 页脚 ============ */
footer{border-top:1px solid var(--line);background:var(--bg-0)}
.foot-main{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 44px}
.foot-brand p{font-size:13.5px;color:var(--ink-3);margin-top:16px;max-width:300px}
.foot h5{font-family:var(--font-d);font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:18px}
.foot ul{list-style:none;display:grid;gap:11px}
.foot ul a{font-size:14px;color:var(--ink-2);transition:color .2s}
.foot ul a:hover{color:var(--cyan)}
.foot-contact{font-size:13.5px;color:var(--ink-2);display:grid;gap:12px}
.foot-contact .row{display:flex;gap:10px;align-items:center}
.foot-contact svg{width:16px;height:16px;color:var(--cyan);flex:none}
.foot-contact .mono{font-family:var(--font-mono);font-size:13px;color:var(--ink)}
.foot-bottom{border-top:1px solid var(--line);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--ink-3)}
.foot-bottom .mono{font-family:var(--font-mono)}
.foot-bottom .icp{color:var(--ink-3);margin-left:10px;transition:color .2s}
.foot-bottom .icp:hover{color:var(--cyan)}

/* ============ 背景音乐悬浮控件 ============ */
.music-float{position:fixed;left:24px;bottom:24px;z-index:90}
.music-toggle{
  display:inline-flex;align-items:center;gap:12px;
  background:rgba(10,17,31,.88);border:1px solid var(--line-2);backdrop-filter:blur(10px);
  border-radius:999px;padding:12px 20px;cursor:pointer;color:var(--ink-2);
  box-shadow:0 18px 44px -16px rgba(0,0,0,.85);transition:border-color .2s,color .2s;
}
.music-toggle:hover{border-color:rgba(53,214,242,.5);color:var(--ink)}
.music-toggle .eq{height:18px}
.music-toggle .eq i{width:3px}
.music-toggle.playing{color:var(--cyan);border-color:rgba(53,214,242,.45)}
.music-toggle.playing .eq i{animation-play-state:running}
.music-toggle:not(.playing) .eq i{animation-play-state:paused;height:18%!important}
.music-label{font-size:13px;letter-spacing:.06em;font-family:var(--font-d);font-weight:600}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .hero .wrap{grid-template-columns:1fr;gap:56px}
  .hero{padding-top:140px}
  .hero-visual{max-width:720px}
  .feat-grid,.eng-grid,.scene-grid{grid-template-columns:1fr 1fr}
  .preview-wrap{grid-template-columns:1fr}
  .pv-tabs{flex-direction:row;flex-wrap:wrap}
  .pv-tab{width:auto;flex:1;min-width:150px}
}
@media (max-width:760px){
  .wrap{padding:0 20px}
  .nav-links{display:none}
  .nav-cta .btn{display:none}
  .burger{display:flex}
  .nav-links.open{display:flex;position:fixed;top:74px;left:0;right:0;flex-direction:column;gap:0;background:rgba(6,11,20,.97);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);padding:12px 20px 20px}
  .nav-links.open a{width:100%;padding:14px 4px;border-bottom:1px solid var(--line);font-size:16px}
  section{padding:76px 0}
  .feat-grid,.eng-grid,.scene-grid,.dl-grid,.dl-steps{grid-template-columns:1fr}
  .hero-stats{flex-wrap:wrap}
  .hero-stats .st{flex:1 1 50%;border-bottom:1px solid var(--line)}
  .hero-stats .st:nth-child(2n){border-right:none}
  .foot-main{grid-template-columns:1fr 1fr}
  .chip-2{left:-8px}
  .chip-1{right:-6px}
  .dl-btn-row .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s!important;animation-iteration-count:1!important;transition-duration:.001s!important}
  html{scroll-behavior:auto}
}