:root{--bg:#0B1014;--panel:#10171D;--panel2:#0E141A;--line:#1C2730;--line2:#2A3946;--text:#E8EEF3;--sub:#A3B0BB;--dim:#71808C;--accent:#4A90C8;--accent2:#76B4E6}
*{box-sizing:border-box}html{scroll-behavior:smooth}[id]{scroll-margin-top:84px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",system-ui,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit}img{max-width:100%;display:block;height:auto}
.wrap{max-width:1240px;margin:0 auto;padding:0 32px}
.skip{position:absolute;left:8px;top:0;transform:translateY(-120%);background:var(--accent);color:#fff;padding:8px 12px;z-index:20}.skip:focus{transform:none}
:focus-visible{outline:2px solid var(--accent2);outline-offset:3px}
header{position:sticky;top:0;z-index:10;background:rgba(11,16,20,.96);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:700;font-size:21px;letter-spacing:3px;white-space:nowrap}.brand svg{width:36px;height:36px;flex:none}
.menu{display:flex;gap:6px;margin:0 auto;padding:0;list-style:none}
.menu a{display:flex;align-items:center;min-height:44px;padding:0 14px;text-decoration:none;color:var(--sub);font-size:15px;position:relative}
.menu a:hover{color:var(--text)}.menu a[aria-current=page]{color:var(--text)}
.menu a[aria-current=page]::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:3px;padding:12px 26px;font-size:16px;text-decoration:none;font-weight:600;border:1px solid transparent;cursor:pointer;min-height:48px;white-space:nowrap;font-family:inherit;transition:background .2s,border-color .2s}
.btn svg{width:20px;height:20px;flex:none}
.btn.pri{background:var(--accent);color:#fff}.btn.pri:hover{background:#3C7DB2}
.btn.ghost{border-color:var(--line2);color:var(--text);background:transparent}.btn.ghost:hover{border-color:var(--accent)}
.nav .btn{padding:10px 20px;font-size:15px;min-height:44px}
.mtoggle{display:none;background:none;border:0;color:var(--text);padding:8px;margin-left:auto;min-width:44px;min-height:44px;cursor:pointer}.mtoggle svg{width:28px;height:28px}
.tag{display:inline-block;color:var(--accent2);font-size:14px;border-left:3px solid var(--accent);padding-left:12px;letter-spacing:1px}
h1{font-size:64px;line-height:1.12;margin:18px 0 14px;letter-spacing:2px;font-weight:700}
.sub{font-size:28px;color:var(--text);margin:0 0 30px;font-weight:500;letter-spacing:1px}
.lead{color:var(--sub);font-size:17px;max-width:720px;margin:0}
.note{color:var(--dim);font-size:13px}
.pagehead{padding:72px 0 40px;border-bottom:1px solid var(--line)}
.pagehead h1{font-size:48px}
section{padding:72px 0;border-bottom:1px solid var(--line)}section:last-of-type{border-bottom:0}
h2{font-size:32px;margin:12px 0 28px;line-height:1.35;font-weight:700}
h3{font-weight:600}
/* 首页 */
.home{display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.45fr);gap:56px;align-items:center;padding:64px 0 36px}
.home h1{font-size:60px}
.dlrow{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.trust{margin-top:34px;padding-top:22px;border-top:1px solid var(--line);color:var(--sub);font-size:14px;display:flex;gap:10px;align-items:flex-start}
.trust svg{width:20px;height:20px;flex:none;stroke:var(--accent);fill:none;stroke-width:1.6;margin-top:3px}
/* 演示播放器 */
.player{position:relative;min-width:0}
.win{position:relative;border:1px solid var(--line2);border-radius:6px;background:#0d1116;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.45)}
.win .bar{display:flex;align-items:center;gap:10px;height:34px;padding:0 12px;border-bottom:1px solid var(--line);font-size:12px;color:var(--dim)}
.win .bar svg{width:16px;height:16px}.win .bar span{flex:1}.win .bar i{width:10px;height:10px;border:1px solid var(--line2);display:inline-block}
.screen{position:relative;aspect-ratio:1440/900;background:#0d1116}
.screen img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .45s ease}
.screen img.on{opacity:1}
.screen img.fast{transition:opacity .12s linear}
.hl{position:absolute;border:2px solid var(--accent2);border-radius:4px;box-shadow:0 0 0 4000px rgba(5,8,11,.38),0 0 18px rgba(118,180,230,.55);opacity:0;transition:all .45s ease;pointer-events:none}
.hl.on{opacity:1}
.hl.pulse::after{content:"";position:absolute;inset:-10px;border:2px solid var(--accent2);border-radius:8px;animation:pulse 1.2s ease-out infinite}
@keyframes pulse{from{opacity:.9;transform:scale(.96)}to{opacity:0;transform:scale(1.08)}}
.cap{position:absolute;left:16px;bottom:16px;background:rgba(11,16,20,.92);border:1px solid var(--line2);border-left:3px solid var(--accent);padding:8px 14px;border-radius:3px;font-size:15px;max-width:calc(100% - 32px)}
.cap small{display:block;color:var(--sub);font-size:12px}
.demo-tag{position:absolute;right:14px;top:12px;font-size:12px;color:var(--accent2);border:1px solid var(--accent);border-radius:3px;padding:2px 8px;background:rgba(11,16,20,.9);opacity:0;transition:opacity .3s}.demo-tag.on{opacity:1}
.steps{display:grid;grid-template-columns:repeat(4,1fr);margin:26px 0 0;padding:0;list-style:none;position:relative}
.steps::before{content:"";position:absolute;left:12.5%;right:12.5%;top:22px;height:1px;background:var(--line2)}
.steps li{display:flex;flex-direction:column;align-items:center;gap:8px;position:relative}
.steps button{width:44px;height:44px;border-radius:50%;border:1px solid var(--line2);background:var(--bg);color:var(--sub);font-family:ui-monospace,Consolas,monospace;font-size:15px;cursor:pointer;transition:all .3s}
.steps li.on button{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 0 0 6px rgba(74,144,200,.15)}
.steps span{font-size:14px;color:var(--sub)}.steps li.on span{color:var(--text)}
/* 功能卡 */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:30px;position:relative}
.card .k{color:var(--accent);font-family:ui-monospace,Consolas,monospace;font-size:26px;font-weight:700}
.card h3{margin:6px 0 10px;font-size:20px}.card p{margin:0;color:var(--sub);font-size:15px}
.card svg.ic{position:absolute;right:26px;top:26px;width:54px;height:54px;stroke:var(--accent);fill:none;stroke-width:1.3;opacity:.9}
.rows{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border-top:1px solid var(--line)}
.rows div{padding:26px 26px 26px 0;border-bottom:1px solid var(--line)}.rows div:nth-child(odd){border-right:1px solid var(--line);padding-right:32px}.rows div:nth-child(even){padding-left:32px}
.rows h3{margin:0 0 6px;font-size:18px}.rows p{margin:0;color:var(--sub);font-size:15px}
.fmts{display:flex;flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none}
.fmts li{display:flex;flex-direction:column;align-items:center;gap:6px;width:84px;padding:14px 0;border:1px solid var(--line);border-radius:3px;font-size:13px;color:var(--sub);font-family:ui-monospace,Consolas,monospace;background:var(--panel2)}
.fmts svg{width:24px;height:24px;stroke:var(--accent);fill:none;stroke-width:1.4}
/* 演示步骤 */
.walk{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.4fr);gap:48px;align-items:center;padding:48px 0;border-bottom:1px solid var(--line)}
.walk:last-child{border-bottom:0}.walk .n{font-family:ui-monospace,Consolas,monospace;color:var(--accent);font-size:44px;font-weight:700}
.walk h3{font-size:24px;margin:4px 0 10px}.walk p{color:var(--sub);margin:0 0 8px}
.shot{border:1px solid var(--line2);border-radius:4px;overflow:hidden;background:#0d1116;margin:0}
.shot figcaption{font-size:12px;color:var(--dim);padding:8px 12px;border-top:1px solid var(--line)}
/* 下载 / 价格 / 关于 */
.dl{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:start}
.box{background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:30px}
.box dl{display:grid;grid-template-columns:auto 1fr;gap:10px 22px;margin:16px 0 0;font-size:15px}.box dt{color:var(--dim)}.box dd{margin:0}
ol.howto{padding-left:22px;color:var(--sub)}ol.howto li{margin:6px 0}
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.plan{background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:32px;display:flex;flex-direction:column}
.plan.mid{border-color:var(--accent)}
.plan h3{margin:0;font-size:20px}.plan .p{font-size:34px;font-weight:700;color:var(--accent2);margin:14px 0 4px}.plan .for{color:var(--dim);font-size:14px}
.plan ul{padding-left:20px;color:var(--sub);flex:1;margin:18px 0 24px}
.contact{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.contact div{background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:24px}.contact b{display:block;color:var(--dim);font-weight:400;font-size:13px;margin-bottom:4px}
footer{padding:44px 0 56px;color:var(--dim);font-size:13px;border-top:1px solid var(--line)}
.foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.foot nav a{margin-right:18px;text-decoration:none;color:var(--sub);display:inline-block;min-height:44px;line-height:44px}
.muted{color:var(--sub)}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (max-width:1100px){.home{grid-template-columns:1fr;gap:36px;padding-top:44px}.home h1{font-size:52px}}
@media (max-width:980px){
 .menu,.nav .btn{display:none}.mtoggle{display:block}
 .menu.open{display:flex;flex-direction:column;gap:0;position:absolute;left:0;right:0;top:72px;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 24px 16px}
 .menu.open a{font-size:17px;padding:0}.menu.open a[aria-current=page]::after{left:0;right:auto;width:24px;bottom:6px}
 .grid3,.plans{grid-template-columns:1fr 1fr}.rows{grid-template-columns:1fr}.rows div:nth-child(n){border-right:0;padding:22px 0}
 .walk,.dl{grid-template-columns:1fr;gap:24px}.contact{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
 .wrap{padding:0 20px}h1,.home h1{font-size:clamp(30px,9vw,40px);letter-spacing:0}.pagehead h1{font-size:34px}.sub{font-size:20px}
 h2{font-size:24px}section{padding:48px 0}.pagehead{padding:44px 0 28px}
 .grid3,.plans,.contact{grid-template-columns:1fr}.card{padding:24px}
 .dlrow .btn{flex:1 1 100%}.steps span{font-size:12px;text-align:center}.cap{font-size:13px;left:8px;bottom:8px;padding:6px 10px}.cap small{display:none}
 .win .bar{height:28px}.fmts li{width:calc(25% - 8px)}
}
.pp{margin-left:auto;min-width:44px;min-height:44px;margin-right:-10px;background:none;border:0;color:var(--sub);cursor:pointer;display:flex;align-items:center;justify-content:center}.pp svg{width:16px;height:16px;stroke:currentColor;stroke-width:2;fill:none}.pp:hover{color:var(--text)}.win .bar{height:44px}