/* ===================== auto video · 深色科技 + 蜜橘橙 ===================== */
:root{
  --bg:#08090d;
  --bg-2:#0c0e13;
  --panel:#13151c;
  --panel-2:#181b24;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --txt:#eef0f5;
  --txt-dim:#9aa0ad;
  --txt-faint:#5f6675;
  --accent:#F08C2E;            /* 蜜橘橙 · 风云主品牌色 */
  --accent-d:#d9761a;
  --accent-soft:rgba(240,140,46,.13);
  --cyan:#23d3c5;
  --maxw:1180px;
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--txt);overflow-x:hidden;
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.accent{color:var(--accent)}
.cyan{color:var(--cyan)}
.glow-text{text-shadow:0 0 24px rgba(240,140,46,.5)}

/* 背景星点光晕 */
body::before{content:"";position:fixed;inset:0;z-index:-2;background:
  radial-gradient(900px 500px at 80% -5%,rgba(240,140,46,.10),transparent 60%),
  radial-gradient(700px 500px at 10% 10%,rgba(35,211,197,.06),transparent 60%);pointer-events:none}
body::after{content:"";position:fixed;inset:0;z-index:-1;opacity:.4;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:42px 42px}

/* ===================== 顶栏 ===================== */
header{position:sticky;top:0;z-index:80;backdrop-filter:blur(16px);background:rgba(8,9,13,.7);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:18px;letter-spacing:.3px}
.logo .mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--accent),#ffb259);
  display:flex;align-items:center;justify-content:center;font-size:15px;color:#1a1206;box-shadow:0 0 18px rgba(240,140,46,.5)}
.logo small{font-weight:500;color:var(--txt-faint);font-size:12px;margin-left:2px}
.nav-links{display:flex;gap:34px;font-size:19px;color:var(--txt-dim)}
.nav-links a{position:relative;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--txt)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-22px;height:2px;background:var(--accent);box-shadow:0 0 10px var(--accent)}
.nav-cta{padding:9px 18px;border-radius:999px;background:var(--accent);color:#1a1206;font-weight:700;font-size:14px;transition:.2s;border:none;cursor:pointer}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(240,140,46,.35)}
.nav-toggle{display:none;background:transparent;border:1px solid var(--line-2);color:var(--txt);font-size:14px;padding:7px 13px;border-radius:8px;cursor:pointer;font-family:inherit}
@media(max-width:820px){
  .nav{justify-content:flex-start;gap:10px}
  .nav .logo{margin-right:auto}
  .nav-toggle{display:inline-flex}
  .nav-links{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(8,9,13,.98);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);padding:6px 0;z-index:90}
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 24px;font-size:17px;border-bottom:1px solid var(--line)}
  .nav-links a:last-child{border-bottom:none}
  .nav-links a.active::after{display:none}
}

/* ===================== 通用按钮 / 区块 ===================== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer;border:1px solid transparent;background:transparent;transition:.2s;font-family:inherit}
.btn-primary{background:var(--accent);color:#1a1206}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(240,140,46,.32)}
.btn-ghost{border-color:var(--line-2);color:var(--txt)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.block{padding:90px 0}
.kicker{font-size:13px;letter-spacing:4px;color:var(--accent);text-transform:uppercase;font-weight:700}
.sec-title{font-size:clamp(26px,4vw,40px);font-weight:800;margin-top:12px;letter-spacing:-.5px}
.sec-desc{color:var(--txt-dim);margin-top:14px;max-width:660px;font-size:16.5px}
.sec-head{margin-bottom:46px}

/* ===================== Hero ===================== */
.hero{position:relative;padding:70px 0 30px;text-align:center}
.badge{display:inline-flex;align-items:center;gap:9px;font-size:13px;color:var(--accent);background:var(--accent-soft);
  border:1px solid rgba(240,140,46,.3);padding:7px 16px;border-radius:999px;margin-bottom:26px}
.badge .live{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent);animation:pulse 1.5s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.65)}}
.hero h1{font-size:clamp(36px,7vw,72px);font-weight:900;line-height:1.08;letter-spacing:-1px}
.hero h1 .mono{font-family:"SF Mono",ui-monospace,"Cascadia Code",monospace;letter-spacing:-2px}
.hero .lede{margin:26px auto 0;max-width:680px;font-size:clamp(16px,2.2vw,20px);color:var(--txt-dim)}
.hero .lede b{color:var(--txt)}
.hero-actions{display:flex;gap:14px;justify-content:center;margin-top:34px;flex-wrap:wrap}

/* ===================== 旋转思维导图(2D椭圆轨道·永不镜像·纯展示) ===================== */
.stage{position:relative;height:560px;margin-top:10px;overflow:hidden}
/* 轨道光环(装饰椭圆) */
.orbit-ring{position:absolute;top:50%;left:50%;width:720px;height:250px;margin:-125px 0 0 -360px;
  border-radius:50%;border:1px solid rgba(240,140,46,.16);pointer-events:none}
.orbit-ring.r2{width:560px;height:190px;margin:-95px 0 0 -280px;border-color:rgba(35,211,197,.12)}
/* 中心核 */
.core{position:absolute;top:50%;left:50%;width:180px;height:180px;margin:-90px 0 0 -90px;border-radius:50%;
  background:radial-gradient(circle at 50% 40%,#2a1d0c,#0c0e13 70%);
  border:1px solid rgba(240,140,46,.35);display:flex;flex-direction:column;align-items:center;justify-content:center;
  box-shadow:0 0 70px rgba(240,140,46,.35),0 0 0 8px rgba(240,140,46,.04);z-index:10}
.core .ct{font-family:"SF Mono",ui-monospace,monospace;font-size:21px;font-weight:800;color:var(--accent);letter-spacing:-1px;line-height:1.1}
.core .cs{font-size:11px;color:var(--txt-dim);margin-top:6px;letter-spacing:1px}
.core .ping{position:absolute;inset:-1px;border-radius:50%;border:1px solid var(--accent);animation:ping 3s ease-out infinite;opacity:0}
@keyframes ping{0%{transform:scale(1);opacity:.6}100%{transform:scale(1.6);opacity:0}}
/* 轨道节点(JS 定位, 永远正面朝向, 不旋转故不镜像) */
.node{position:absolute;top:50%;left:50%;width:184px;will-change:transform;pointer-events:none}
.node-card{display:block;background:var(--panel);border:1px solid var(--line-2);border-radius:16px;overflow:hidden;
  box-shadow:0 18px 50px rgba(0,0,0,.55)}
.node-card .vidwrap{position:relative;background:#000;height:230px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.node-card video{height:100%;width:auto;max-width:none}
.node-card.wide .vidwrap{height:118px}
.node-card.wide video{width:100%;height:auto}
.node-card .meta{padding:11px 13px}
.node-card .meta .nm{font-weight:700;font-size:14px}
.node-card .meta .go{font-size:11.5px;color:var(--txt-faint);margin-top:3px}
@media(max-width:820px){.stage{height:430px;transform:scale(.58)}}

/* ===================== 概述卡片 ===================== */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:860px){.grid3{grid-template-columns:1fr}}
.ocard{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s;position:relative;overflow:hidden}
.ocard::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),transparent)}
.ocard:hover{transform:translateY(-5px);border-color:rgba(240,140,46,.4);background:var(--panel-2)}
.ocard .ic{font-size:26px;margin-bottom:14px}
.ocard h3{font-size:19px;font-weight:700}
.ocard .kol{font-size:12.5px;color:var(--accent);margin:6px 0 10px}
.ocard p{color:var(--txt-dim);font-size:14.5px}
.ocard .more{display:inline-flex;align-items:center;gap:6px;margin-top:18px;color:var(--accent);font-size:14px;font-weight:600}

/* ===================== 技术亮点 ===================== */
.feat{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:860px){.feat{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.feat{grid-template-columns:1fr}}
.fcard{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:16px;padding:24px}
.fcard .n{font-family:"SF Mono",monospace;font-size:13px;color:var(--accent);font-weight:700}
.fcard h4{font-size:17px;font-weight:700;margin:10px 0 8px}
.fcard p{font-size:13.5px;color:var(--txt-dim)}

/* ===================== 产品详情页 ===================== */
.phero{padding:60px 0 20px}
.phero .back{font-size:14px;color:var(--txt-dim)}
.phero .back:hover{color:var(--accent)}
.phero h1{font-size:clamp(30px,5vw,52px);font-weight:900;margin-top:20px;letter-spacing:-1px}
.phero .tl{color:var(--accent);font-size:17px;margin-top:10px;font-weight:600}
.phero .intro{color:var(--txt-dim);font-size:17px;max-width:760px;margin-top:18px}
.pmod{margin-top:64px}
.pmod .mh{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.pmod .mh .tag{font-family:"SF Mono",monospace;font-size:12px;color:var(--accent);border:1px solid rgba(240,140,46,.35);padding:4px 10px;border-radius:7px}
.pmod .mh h2{font-size:24px;font-weight:800}

/* 对标 vs 复刻 对照 */
.vs{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:760px){.vs{grid-template-columns:1fr}}
.vs-col{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.vs-col .lab{font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.vs-col.orig .lab{color:var(--cyan)}
.vs-col.clone .lab{color:var(--accent)}
.vs-col .lab .d{width:8px;height:8px;border-radius:50%;background:currentColor}
.kolbar{display:flex;gap:14px;align-items:center;margin-bottom:16px}
.kolbar img{width:54px;height:54px;border-radius:50%;border:1px solid var(--line-2);object-fit:cover}
.kolbar .ki .kn{font-weight:700}
.kolbar .ki .kf{font-size:12.5px;color:var(--txt-faint)}
.media{position:relative;border-radius:12px;overflow:hidden;background:#000;cursor:pointer}
.media.v{aspect-ratio:9/16;max-width:300px;margin-left:auto;margin-right:auto}
.media.h{aspect-ratio:16/9}
.media img,.media video{width:100%;height:100%;object-fit:cover;display:block}
.media .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.media .play span{width:54px;height:54px;border-radius:50%;background:rgba(240,140,46,.92);color:#1a1206;display:flex;align-items:center;justify-content:center;font-size:22px;padding-left:4px;box-shadow:0 6px 20px rgba(0,0,0,.5)}
/* 两栏等高 + 媒体在底部对齐, 视觉更整齐 */
.vs-col{display:flex;flex-direction:column}
.vs-col .media{margin-top:auto}
.shotrow{display:flex;gap:10px;margin-top:12px;overflow-x:auto;padding-bottom:4px}
.shotrow img{height:120px;border-radius:8px;border:1px solid var(--line)}
.note{font-size:12.5px;color:var(--txt-faint);margin-top:10px}

/* 技术原理 */
.tech-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:820px){.tech-grid{grid-template-columns:1fr}.tech-text,.feishu-shot{height:auto!important;min-height:300px}}
.tech-text{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px;font-size:15.5px;color:var(--txt-dim);line-height:1.85;height:360px;display:flex;flex-direction:column;justify-content:center}
.tech-text b{color:var(--txt)}
.feishu-shot{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel);height:360px;display:flex;flex-direction:column}
.feishu-shot .cap{padding:11px 16px;font-size:13px;color:var(--txt-dim);border-bottom:1px solid var(--line);flex-shrink:0}
.feishu-shot img{cursor:pointer;flex:1;min-height:0;width:100%;object-fit:cover}

/* 商业化价格表 */
.pricetable{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.pricetable th{background:var(--panel-2);text-align:left;padding:16px 20px;font-size:14px;color:var(--txt-dim);font-weight:600;border-bottom:1px solid var(--line)}
.pricetable td{padding:18px 20px;border-bottom:1px solid var(--line);font-size:15px;vertical-align:middle}
.pricetable tr:last-child td{border-bottom:none}
.pricetable .biz{font-weight:700}
.pricetable .pr{font-size:22px;font-weight:800;color:var(--accent);white-space:nowrap}
.pricetable .pr small{font-size:13px;color:var(--txt-faint);font-weight:400}
.pricetable .act{text-align:right}
@media(max-width:760px){
  .pricetable thead{display:none}
  .pricetable,.pricetable tbody,.pricetable tr,.pricetable td{display:block;width:auto}
  .pricetable tr{padding:16px 18px;border-bottom:1px solid var(--line)}
  .pricetable tr:last-child{border-bottom:none}
  .pricetable td{border:none;padding:3px 0}
  .pricetable .biz{font-size:17px;font-weight:800}
  .pricetable .pr{font-size:21px;margin-top:4px}
  .pricetable .act{text-align:left;margin-top:10px}
}

/* 课程弱化入口 */
.course-strip{margin-top:40px;border:1px dashed var(--line-2);border-radius:14px;padding:18px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px;background:rgba(255,255,255,.015)}
.course-strip .ct{font-size:14.5px;color:var(--txt-dim)}
.course-strip a{font-size:14px;color:var(--accent);font-weight:600;white-space:nowrap}

/* ===================== 页脚 ===================== */
footer{border-top:1px solid var(--line);padding:56px 0 36px;background:#06070a;margin-top:40px}
.foot{display:flex;justify-content:space-between;gap:36px;flex-wrap:wrap}
.foot .fb{max-width:340px}
.foot .fb p{color:var(--txt-faint);font-size:14px;margin-top:12px}
.foot .fc{font-size:14.5px;color:var(--txt-dim)}
.foot .fc .row{margin-bottom:9px}
.foot .fc b{color:var(--txt)}
.copy{margin-top:36px;padding-top:22px;border-top:1px solid var(--line);text-align:center;color:var(--txt-faint);font-size:13px}

/* ===================== 弹窗（收款 / 视频）===================== */
.mask{position:fixed;inset:0;background:rgba(0,0,0,.78);backdrop-filter:blur(6px);z-index:200;display:none;align-items:center;justify-content:center;padding:20px}
.mask.show{display:flex}
.modal{background:var(--panel);border:1px solid var(--line-2);border-radius:22px;max-width:420px;width:100%;padding:32px;position:relative;animation:pop .25s}
@keyframes pop{from{transform:scale(.93);opacity:0}to{transform:scale(1);opacity:1}}
.modal .x,.vmodal .x{position:absolute;top:14px;right:18px;font-size:26px;color:var(--txt-faint);cursor:pointer;line-height:1;z-index:2}
.modal h3{font-size:21px;font-weight:800}
.modal .mp{color:var(--accent);font-size:28px;font-weight:800;margin:6px 0 18px}
.qr-box{background:#fff;border-radius:16px;aspect-ratio:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#999;font-size:13px;text-align:center;padding:20px;margin-bottom:18px;border:2px dashed #ccc}
.qr-box img{width:100%;height:100%;object-fit:contain}
.steps{counter-reset:s;font-size:14px;color:var(--txt-dim)}
.steps li{list-style:none;padding:8px 0 8px 36px;position:relative}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:8px;width:24px;height:24px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:13px;display:flex;align-items:center;justify-content:center}
.steps b{color:var(--txt)}
.vmodal{position:relative;max-width:420px;width:100%;animation:pop .25s}
.vmodal video{width:100%;border-radius:16px;background:#000;max-height:84vh}

.reveal{opacity:0;transform:translateY(26px);transition:.7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}