/* 燃渊 · 黑黄赛博机甲 */
:root{
  --bg:#0b0b0e;
  --bg-d:#060608;
  --panel:#141419;
  --paper:#f2f2ec;
  --ink:#17171c;
  --ink-soft:#6a6a72;
  --tx:#f2f2ec;
  --tx-soft:#a9a9b2;
  --line-d:rgba(242,242,236,.12);
  --yl:#facc15;
  --yl-d:#ca9a04;
  --pk:#e879f9;
  --stripe:repeating-linear-gradient(-45deg,var(--yl) 0 12px,#0b0b0e 12px 24px);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;color:var(--tx);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:800;border-radius:4px;padding:10px 22px;font-size:15px;transition:.25s;border:1.5px solid transparent;cursor:pointer;clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px)}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-pri{background:var(--yl);color:var(--ink);box-shadow:0 10px 26px rgba(250,204,21,.4)}
.btn-pri:hover{background:#fde047;transform:translateY(-2px)}
.btn-ghost{border-color:rgba(242,242,236,.45);color:var(--tx);background:transparent}
.btn-ghost:hover{border-color:var(--yl);color:var(--yl);transform:translateY(-2px)}

/* 头部 */
.hd{position:sticky;top:0;z-index:60;background:rgba(11,11,14,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line-d)}
.hd::after{content:"";display:block;height:4px;background:var(--stripe)}
.hd-in{display:flex;align-items:center;gap:28px;height:66px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand img{border-radius:9px}
.brand-t{display:flex;flex-direction:column;line-height:1.25}
.brand-t strong{font-size:19px;letter-spacing:2px;color:#fff}
.brand-t small{font-size:11px;color:var(--tx-soft)}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:8px 13px;font-size:14.5px;color:var(--tx-soft);transition:.2s;clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px)}
.nav a:hover{color:#fff;background:rgba(250,204,21,.14)}
.nav a.on{color:var(--yl);font-weight:700}
.hd-r{display:flex;align-items:center;gap:12px}
.hd-cta{padding:9px 20px;font-size:14px}
.burger{display:none;width:40px;height:40px;border:1.5px solid var(--line-d);border-radius:6px;background:rgba(255,255,255,.05);cursor:pointer;position:relative}
.burger span{position:absolute;left:10px;right:10px;height:2px;background:var(--tx);transition:.25s}
.burger span:nth-child(1){top:13px}
.burger span:nth-child(2){top:19px}
.burger span:nth-child(3){top:25px}
.burger.on span:nth-child(1){top:19px;transform:rotate(45deg)}
.burger.on span:nth-child(2){opacity:0}
.burger.on span:nth-child(3){top:19px;transform:rotate(-45deg)}

/* 英雄区 */
.hero{position:relative;overflow:hidden;background:radial-gradient(800px 480px at 82% 10%,rgba(250,204,21,.1),transparent 60%),radial-gradient(560px 400px at 6% 88%,rgba(232,121,249,.1),transparent 64%),var(--bg)}
.hero-grid-bg{position:absolute;inset:0;pointer-events:none;background:linear-gradient(rgba(250,204,21,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(250,204,21,.05) 1px,transparent 1px);background-size:44px 44px}
.hero-in{position:relative;display:grid;grid-template-columns:1.06fr .94fr;gap:44px;align-items:center;padding:76px 24px 92px}
.kick{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;letter-spacing:2.5px;font-weight:800;color:var(--yl)}
.kick-bar{width:26px;height:10px;background:var(--stripe)}
.hero-l h1{font-size:62px;letter-spacing:8px;margin:14px 0 6px;color:#fff;font-weight:900}
.hero-slogan{font-size:26px;margin-bottom:18px}
.hero-slogan em{font-style:normal;color:var(--pk);border-bottom:3px solid var(--yl);padding-bottom:2px}
.lead{font-size:15.5px;color:var(--tx-soft);max-width:520px;margin-bottom:28px}
.hero-acts{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.hero-points{display:flex;gap:12px;flex-wrap:wrap}
.hero-points li{border:1.5px solid var(--line-d);background:rgba(255,255,255,.04);padding:7px 14px;font-size:13px;color:var(--tx-soft);clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px)}
.hero-points b{color:var(--yl);margin-right:4px}

/* 机甲框 */
.hero-r{position:relative;display:flex;justify-content:center;padding:18px}
.mech{position:absolute;inset:0;pointer-events:none}
.mc-c{position:absolute;width:34px;height:34px;border:3px solid var(--yl)}
.mc-tl{left:0;top:0;border-right:none;border-bottom:none}
.mc-tr{right:0;top:0;border-left:none;border-bottom:none}
.mc-bl{left:0;bottom:0;border-right:none;border-top:none}
.mc-br{right:0;bottom:0;border-left:none;border-top:none}
.hero-shot{position:relative;z-index:2;border:2px solid rgba(250,204,21,.6);box-shadow:0 28px 64px rgba(0,0,0,.6);transform:rotate(1.6deg)}
.hud{position:absolute;z-index:3;padding:10px 15px;display:flex;flex-direction:column;line-height:1.35;border:2px solid var(--bg-d);clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px)}
.hud b{font-size:17px;font-variant-numeric:tabular-nums}
.hud span{font-size:11px;opacity:.85}
.hud-a{left:-2%;top:13%;background:var(--yl);color:var(--ink);box-shadow:6px 6px 0 rgba(232,121,249,.7);transform:rotate(-4deg)}
.hud-b{right:-2%;bottom:11%;background:#fff;color:#a21caf;box-shadow:-6px 6px 0 rgba(250,204,21,.75);transform:rotate(3.6deg)}

/* 数据条 */
.stats{padding:0 0 70px;margin-top:-38px;position:relative;z-index:4}
.st-in{display:grid;grid-template-columns:repeat(4,1fr);background:var(--panel);border:1.5px solid rgba(250,204,21,.4);box-shadow:0 14px 32px rgba(0,0,0,.45)}
.st{padding:24px 18px;text-align:center;border-left:1px dashed rgba(250,204,21,.3)}
.st:first-child{border-left:none}
.st b{display:block;font-size:29px;color:var(--yl);font-variant-numeric:tabular-nums}
.st:nth-child(even) b{color:var(--pk)}
.st span{font-size:13px;color:var(--tx-soft)}

/* 区块头 */
.sec-head{text-align:center;max-width:640px;margin:0 auto 44px}
.sec-kick{font-size:12px;letter-spacing:3px;font-weight:800;color:var(--pk);margin-bottom:10px}
.sec-head h2{font-size:30px;letter-spacing:1px;color:#fff}
.sec-sub{margin-top:10px;font-size:14.5px;color:var(--tx-soft)}
.sec-head.light h2{color:#fff}
.sec-head.light .sec-sub{color:var(--tx-soft)}

/* 数字人角色库 */
.souls{padding:80px 0 84px}
.sl-in{display:grid;grid-template-columns:320px 1fr;gap:38px;align-items:center}
.sl-find{border:2px solid rgba(232,121,249,.55);position:relative}
.sl-find figcaption{position:absolute;left:12px;bottom:12px;background:rgba(6,6,8,.88);color:var(--pk);font-size:12.5px;font-weight:700;padding:6px 12px}
.sl-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.sc{position:relative;background:var(--panel);border:1.5px solid var(--line-d);border-top:4px solid var(--yl);padding:24px 22px 20px;box-shadow:0 12px 26px rgba(0,0,0,.38);transition:.25s}
.sc:hover{transform:translateY(-5px)}
.sc-tag{display:inline-block;background:rgba(232,121,249,.14);border:1.5px solid var(--pk);color:var(--pk);font-size:12px;font-weight:700;padding:3px 10px;margin-bottom:12px}
.sc-tag-y{background:rgba(250,204,21,.12);border-color:var(--yl);color:var(--yl)}
.sc h3{font-size:21px;color:#fff;margin-bottom:6px}
.sc-desc{font-size:13.5px;color:var(--tx-soft);min-height:66px}
.sc-data{margin-top:14px;padding-top:12px;border-top:1px dashed rgba(250,204,21,.3);font-size:12.5px;color:var(--yl);font-weight:700}

/* 无缝对话 */
.dialog{background:var(--bg-d);padding:80px 0 78px}
.dg-in{display:grid;grid-template-columns:1fr 280px;gap:44px;align-items:center}
.dg-board{background:#101015;border:1.5px solid rgba(250,204,21,.45);padding:30px 30px 24px;box-shadow:0 24px 52px rgba(0,0,0,.55);position:relative}
.dg-board::before{content:"";position:absolute;top:0;left:0;right:0;height:6px;background:var(--stripe)}
.db-row{display:flex;gap:12px;margin-bottom:16px;align-items:flex-start;flex-wrap:wrap}
.db-row b{flex-shrink:0;font-size:12px;padding:5px 11px;margin-top:2px}
.db-ai b{background:rgba(232,121,249,.2);color:var(--pk)}
.db-me{flex-direction:row-reverse}
.db-me b{background:rgba(250,204,21,.18);color:var(--yl)}
.db-row p{font-size:14px;padding:11px 15px;line-height:1.6;max-width:430px}
.db-ai p{background:rgba(232,121,249,.1);border:1px solid rgba(232,121,249,.32)}
.db-ai p i{opacity:.75;font-size:12.5px}
.db-me p{background:rgba(250,204,21,.1);border:1px solid rgba(250,204,21,.34)}
.db-voice{font-size:11px;color:var(--tx-soft);border:1px solid var(--line-d);padding:3px 9px;align-self:center}
.db-call{display:flex;align-items:center;gap:14px;background:rgba(250,204,21,.1);border:1.5px solid var(--yl);padding:12px 18px;margin:6px 0 16px}
.db-call span{font-size:13px;color:var(--yl);font-weight:700}
.db-call b{font-size:22px;color:#fff;font-variant-numeric:tabular-nums}
.db-call em{font-style:normal;font-size:11.5px;color:var(--tx-soft);margin-left:auto}
.db-note{border-top:1px dashed rgba(250,204,21,.3);padding-top:16px;font-size:12.5px;color:var(--tx-soft)}
.dg-shot{border:2px solid rgba(232,121,249,.55);transform:rotate(2deg)}

/* AI 视频互动（浅色） */
.video{background:var(--paper);color:var(--ink);padding:80px 0 84px}
.video .sec-head h2{color:var(--ink)}
.video .sec-sub{color:var(--ink-soft)}
.vd-in{display:grid;grid-template-columns:300px 1fr;gap:48px;align-items:center}
.vd-frame{background:#fff;border:2px solid var(--ink);padding:12px;box-shadow:8px 8px 0 rgba(250,204,21,.55);transform:rotate(-1.8deg)}
.vd-frame img{border:1px solid rgba(23,23,28,.15)}
.vd-frame figcaption{padding-top:10px;font-size:13px;font-weight:800;text-align:center}
.vd-list{counter-reset:vd;display:grid;grid-template-columns:1fr 1fr;gap:18px 26px}
.vd-list li{position:relative;background:#fff;border:2px solid var(--ink);border-left:6px solid var(--yl);padding:16px 18px 14px 54px}
.vd-list li:nth-child(even){border-left-color:var(--pk)}
.vd-list li::before{counter-increment:vd;content:counter(vd,decimal-leading-zero);position:absolute;left:14px;top:14px;font-size:22px;font-weight:900;color:var(--yl-d);-webkit-text-stroke:0}
.vd-list li:nth-child(even)::before{color:#a21caf}
.vd-list b{font-size:15.5px}
.vd-list p{font-size:13px;color:var(--ink-soft);margin-top:3px}

/* AI 随行 */
.link{background:var(--bg-d);padding:80px 0 78px}
.lk-in{display:grid;grid-template-columns:280px 1fr;gap:44px;align-items:center}
.lk-shot{border:2px solid rgba(250,204,21,.55);transform:rotate(-2deg)}
.lk-cards{display:flex;flex-direction:column;gap:16px}
.lk{background:var(--panel);border:1.5px solid var(--line-d);border-left:5px solid var(--yl);padding:18px 22px;transition:.25s}
.lk:hover{border-color:var(--yl)}
.lk:nth-child(2){border-left-color:var(--pk)}
.lk:nth-child(2):hover{border-color:var(--pk)}
.lk h3{font-size:16.5px;color:#fff}
.lk p{font-size:13.5px;color:var(--tx-soft);margin-top:4px}

/* 渊底实拍（浅色） */
.shots{background:var(--paper);color:var(--ink);padding:78px 0 80px}
.shots .sec-head h2{color:var(--ink)}
.shots .sec-sub{color:var(--ink-soft)}
.film{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.fl{background:#fff;border:2px solid var(--ink);padding:11px 11px 13px;transition:.25s}
.fl:hover{transform:translateY(-4px)}
.fl img{border:1px solid rgba(23,23,28,.14)}
.fl figcaption{padding-top:10px;line-height:1.45}
.fl b{display:block;font-size:14px}
.fl span{font-size:12px;color:var(--ink-soft)}

/* 常见疑问 */
.faq{padding:80px 0 78px}
.acc{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.acc-item{background:var(--panel);border:1.5px solid var(--line-d);box-shadow:0 8px 18px rgba(0,0,0,.32);overflow:hidden}
.acc-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:none;cursor:pointer;text-align:left;font-size:16px;font-weight:700;color:#fff;padding:19px 22px;font-family:inherit}
.acc-ic{position:relative;flex-shrink:0;width:22px;height:22px;border:2px solid var(--yl)}
.acc-ic::before,.acc-ic::after{content:"";position:absolute;background:var(--yl);left:50%;top:50%;transform:translate(-50%,-50%)}
.acc-ic::before{width:10px;height:2px}
.acc-ic::after{width:2px;height:10px;transition:.25s}
.acc-item.on .acc-ic{border-color:var(--pk)}
.acc-item.on .acc-ic::before{background:var(--pk)}
.acc-item.on .acc-ic::after{transform:translate(-50%,-50%) scaleY(0)}
.acc-body{max-height:0;overflow:hidden;transition:max-height .35s ease}
.acc-item.on .acc-body{max-height:300px}
.acc-body p{padding:15px 22px 20px;font-size:14.5px;color:var(--tx-soft);border-top:1px dashed rgba(250,204,21,.3)}

/* 来客留言 */
.notes{background:var(--bg-d);padding:78px 0 84px}
.nt-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.nt{position:relative;background:var(--panel);border:1.5px solid var(--line-d);border-top:4px solid var(--pk);padding:24px 20px 17px;box-shadow:5px 5px 0 rgba(232,121,249,.3)}
.nt-b{border-top-color:var(--yl)}
.nt-txt{font-size:14px;min-height:106px;color:var(--tx)}
.nt-meta{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-top:13px;padding-top:12px;border-top:1px dashed rgba(242,242,236,.2)}
.nt-meta b{font-size:13.5px;color:var(--pk)}
.nt-b .nt-meta b{color:var(--yl)}
.nt-meta time{font-size:11.5px;color:var(--tx-soft);font-variant-numeric:tabular-nums}

/* 下载区 */
.gate{padding:80px 0 90px;background:var(--bg)}
.dl{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center;background:linear-gradient(135deg,#e879f9 0%,#a21caf 100%);padding:56px 54px;box-shadow:0 22px 50px rgba(232,121,249,.35);position:relative;overflow:hidden}
.dl::before{content:"";position:absolute;left:0;right:0;top:0;height:8px;background:var(--stripe)}
.dl-kick{font-size:12px;letter-spacing:3px;font-weight:800;color:rgba(11,11,14,.72);margin-bottom:12px}
.dl h2{font-size:36px;color:#fff;line-height:1.35;letter-spacing:1px}
.dl h2 em{font-style:normal;color:var(--yl);border-bottom:3px solid var(--yl);padding-bottom:2px}
.dl-sub{margin:16px 0 26px;font-size:14.5px;color:rgba(255,255,255,.86);max-width:460px}
.dl-acts{display:flex;gap:14px;flex-wrap:wrap}
.dl .btn-pri{background:var(--bg-d);color:var(--yl);box-shadow:none}
.dl .btn-pri:hover{background:#1c1c22}
.dl .btn-ghost{border-color:rgba(255,255,255,.65);color:#fff}
.dl .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.12);color:#fff}
.dl-r{position:relative;z-index:2;display:flex;justify-content:center}
.dl-badge{width:230px;height:230px;background:rgba(11,11,14,.94);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;transform:rotate(-3deg);border:2px solid var(--yl)}
.dlb-flame{width:26px;height:26px;background:linear-gradient(160deg,var(--pk),var(--yl));border-radius:50% 50% 50% 4px;transform:rotate(-45deg)}
.dl-badge b{font-size:30px;color:#fff;letter-spacing:4px}
.dl-badge span{font-size:11.5px;color:rgba(242,242,236,.72)}
.dlb-bar{width:80px;height:8px;background:var(--stripe);margin-top:8px}

/* 页脚 */
.ft{background:var(--bg-d);color:var(--tx-soft);padding:36px 0;border-top:1px solid var(--line-d)}
.ft-in{display:flex;align-items:center;gap:34px;flex-wrap:wrap}
.ft-brand{display:flex;align-items:center;gap:10px}
.ft-brand img{border-radius:9px}
.ft-brand strong{color:#fff;font-size:17px;letter-spacing:2px}
.ft-brand span{font-size:12px;color:rgba(169,169,178,.6)}
.ft-nav{display:flex;gap:18px;flex-wrap:wrap;margin-left:auto}
.ft-nav a{font-size:13px;color:var(--tx-soft);transition:.2s}
.ft-nav a:hover{color:var(--yl)}
.ft-copy{width:100%;border-top:1px solid var(--line-d);padding-top:16px;font-size:12.5px;color:rgba(169,169,178,.55);display:flex;flex-direction:column;gap:3px}
.ft-copy a{color:inherit}
.ft-copy a:hover{color:var(--yl)}

/* 悬浮件 */
.float-complaint{position:fixed;right:24px;bottom:220px;z-index:70;width:62px;background:var(--panel);border:1.5px solid var(--line-d);border-radius:12px;display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px 0 9px;color:var(--tx-soft);font-size:11.5px;font-weight:700;box-shadow:0 6px 16px rgba(0,0,0,.3);transition:.25s}
.float-complaint:hover{color:#fff;border-color:var(--yl);transform:translateY(-2px)}
.backtop{position:fixed;right:24px;bottom:160px;z-index:70;width:44px;height:44px;border-radius:12px;background:var(--panel);border:1.5px solid var(--line-d);cursor:pointer;opacity:0;pointer-events:none;transition:.3s}
.backtop.show{opacity:1;pointer-events:auto}
.backtop::before{content:"";position:absolute;left:50%;top:50%;width:11px;height:11px;border-left:2.5px solid var(--tx-soft);border-top:2.5px solid var(--tx-soft);transform:translate(-50%,-30%) rotate(45deg)}
.backtop:hover{border-color:var(--yl)}

/* 响应式 */
@media(max-width:1020px){
  .nav{position:fixed;top:70px;left:0;right:0;background:#101015;flex-direction:column;padding:14px 20px 20px;gap:6px;border-bottom:1.5px solid var(--line-d);display:none;z-index:59}
  .nav.open{display:flex}
  .burger{display:block}
  .hd-cta{display:none}
  .hero-in{grid-template-columns:1fr;padding:56px 24px 76px;gap:56px}
  .hero-l h1{font-size:46px;letter-spacing:5px}
  .st-in{grid-template-columns:repeat(2,1fr)}
  .st:nth-child(3){border-left:none}
  .st{border-top:1px dashed rgba(250,204,21,.3)}
  .st:nth-child(-n+2){border-top:none}
  .sl-in{grid-template-columns:1fr}
  .sl-find{max-width:300px;margin:0 auto}
  .dg-in,.vd-in,.lk-in{grid-template-columns:1fr;gap:40px}
  .dg-shot,.lk-shot{max-width:280px;margin:0 auto}
  .vd-frame{max-width:300px;margin:0 auto}
  .film{grid-template-columns:repeat(3,1fr)}
  .nt-grid{grid-template-columns:repeat(2,1fr)}
  .dl{grid-template-columns:1fr;padding:44px 34px}
  .dl-r{display:none}
}
@media(max-width:640px){
  .hero-l h1{font-size:40px;letter-spacing:4px}
  .hero-slogan{font-size:21px}
  .sec-head h2{font-size:25px}
  .sl-grid{grid-template-columns:1fr}
  .sc-desc{min-height:0}
  .vd-list{grid-template-columns:1fr}
  .film{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:10px}
  .fl{min-width:200px;scroll-snap-align:start}
  .nt-grid{grid-template-columns:1fr}
  .nt-txt{min-height:0}
  .dl h2{font-size:28px}
  .ft-in{flex-direction:column;align-items:flex-start;gap:16px}
  .ft-nav{margin-left:0}
  .float-complaint{right:18px;bottom:204px;width:56px;font-size:11px}
  .backtop{right:18px;bottom:150px}
}