*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{background:#0e0e10;color:#f5f5f7;font-family:'Instrument Sans','Noto Sans SC','PingFang SC','Microsoft YaHei UI',sans-serif;-webkit-font-smoothing:antialiased}
a{color:#f5f5f7;text-decoration:none}
a:hover{color:#ffffff}
details summary::-webkit-details-marker{display:none}
img{max-width:100%}

.wrap{position:relative;min-height:100vh;overflow:hidden;background:linear-gradient(180deg,#0e0e10,#131316 60%,#0c0c0e)}
.blobs{position:absolute;inset:0;pointer-events:none;overflow:hidden;z-index:0}
.blob{position:absolute;border-radius:50%}

.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(24px) saturate(1.4);-webkit-backdrop-filter:blur(24px) saturate(1.4);background:rgba(14,14,16,.66);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-inner{display:flex;align-items:center;gap:24px;max-width:1120px;height:56px;margin:0 auto;padding:0 24px}
.nav-inner img{width:28px;height:28px;border-radius:8px;box-shadow:0 6px 18px rgba(0,0,0,.4)}
.nav-links{display:flex;align-items:center;gap:22px;font-size:13px;color:#c2c2c8}
.nav-links a{color:#c2c2c8}
.nav-brand{display:flex;align-items:center}
/* 横向产品导航（贾维斯为首个产品，后续产品横向扩展） */
.product-tabs{display:flex;align-items:center;gap:6px}
.product-tab{padding:7px 15px;border-radius:99px;font-size:13.5px;font-weight:650;color:#c2c2c8;white-space:nowrap;transition:background .15s,color .15s}
.product-tab.active{background:linear-gradient(135deg,rgba(255,255,255,.16),rgba(255,255,255,.06));color:#fff;border:1px solid rgba(255,255,255,.16);box-shadow:inset 0 1px 0 rgba(255,255,255,.2)}
.product-tab:not(.active):not(.product-tab--soon):hover{color:#fff;background:rgba(255,255,255,.06)}
.product-tab--soon{color:#6a6a70;font-weight:500;font-size:12px;cursor:default;border:1px dashed rgba(255,255,255,.12)}
/* 纵向分级导航（右侧浮动，滚动高亮） */
.side-nav{position:fixed;top:50%;right:20px;transform:translateY(-50%);z-index:40;display:flex;flex-direction:column;gap:2px;padding:8px;border-radius:16px;background:rgba(20,20,24,.5);border:1px solid rgba(255,255,255,.08);backdrop-filter:blur(20px) saturate(1.4);-webkit-backdrop-filter:blur(20px) saturate(1.4);box-shadow:0 20px 50px rgba(0,0,0,.45)}
.side-nav__item{display:flex;align-items:center;gap:9px;padding:8px 13px 8px 11px;border-radius:11px;font-size:12.5px;font-weight:600;color:#8f8f96;transition:color .15s,background .15s}
.side-nav__item:hover{color:#f5f5f7;background:rgba(255,255,255,.06)}
.side-nav__dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.55;flex:none;transition:transform .18s,opacity .18s,background .18s}
.side-nav__item.active{color:#f5f5f7;background:rgba(255,255,255,.08)}
.side-nav__item.active .side-nav__dot{opacity:1;transform:scale(1.6);background:#ff9256;box-shadow:0 0 10px rgba(255,146,86,.6)}
@media (max-width:1180px){ .side-nav{display:none} }
@media (max-width:640px){ .product-tab--soon{display:none} }
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:99px;font-weight:650;white-space:nowrap}
.btn-light{background:#f5f5f7;color:#111113;box-shadow:inset 0 1px 0 rgba(255,255,255,.9),0 8px 20px rgba(0,0,0,.35)}
.btn-ghost{background:rgba(120,120,128,.18);color:#f5f5f7;font-weight:600;border:1px solid rgba(255,255,255,.14);backdrop-filter:blur(12px)}

section{position:relative}
.hero{padding:88px 24px 0;text-align:center}
.hero-inner{max-width:1120px;margin:0 auto}
.eyebrow{font-size:15px;font-weight:600;color:#94949b;letter-spacing:-.01em}
h1{max-width:900px;margin:14px auto 0;font-size:64px;font-weight:760;letter-spacing:-.045em;line-height:1.02;text-wrap:balance;background:linear-gradient(180deg,#ffffff,#c9c9cf);-webkit-background-clip:text;background-clip:text;color:transparent}
.subcopy{max-width:640px;margin:18px auto 0;font-size:19px;font-weight:450;color:#a1a1a8;letter-spacing:-.015em;line-height:1.45}
.hero-actions{display:flex;justify-content:center;gap:12px;margin-top:28px;flex-wrap:wrap}
.chips{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:24px}
.chip{padding:6px 14px;border-radius:99px;background:rgba(120,120,128,.16);border:1px solid rgba(255,255,255,.1);font-size:12px;font-weight:600;color:#c2c2c8}
.chip--muted{color:#77787e}
.fine-print{margin-top:14px;font-size:12px;color:#77787e}

.shot-section{max-width:1120px;margin:52px auto 0;padding:0 24px}
.shot-glow{position:relative}
.shot-glow::before{content:"";position:absolute;inset:40px -40px -40px;background:radial-gradient(ellipse at 50% 100%,rgba(255,146,86,.1),transparent 60%);filter:blur(40px);z-index:-1}
.shot-frame{position:relative;border-radius:18px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);box-shadow:inset 0 1px 0 rgba(255,255,255,.14),0 50px 140px rgba(0,0,0,.6);overflow:hidden}
.shot-bar{display:flex;align-items:center;gap:8px;height:40px;padding:0 16px;background:rgba(255,255,255,.04);border-bottom:1px solid rgba(255,255,255,.08)}
.shot-dot{width:11px;height:11px;border-radius:50%}
.shot-bar span.label{flex:1;text-align:center;font-size:12px;color:#77787e}
.shot-wrap{position:relative;overflow:hidden;background:#111113}
.shot-wrap img{display:block;width:100%;height:auto}
.shot-wrap iframe{position:absolute;top:0;left:0;width:1440px;height:900px;border:0;display:none;transform-origin:0 0;pointer-events:none}
.shot-caption{margin-top:14px;font-size:11.5px;color:#5c5c62;font-family:'SF Mono',ui-monospace,Menlo,monospace}

.section-head{max-width:720px;margin:0 auto;text-align:center}
.overview{padding:120px 24px 0}
.overview h2{font-size:40px;font-weight:740;letter-spacing:-.035em;line-height:1.1;text-wrap:balance;margin:0}
.overview p{max-width:640px;margin:14px auto 0;font-size:16px;color:#a1a1a8;line-height:1.6}

.features{padding:72px 24px 0}
.features-inner{max-width:1120px;margin:0 auto}
.features h2,.agents h2,.faq h2{font-size:32px;font-weight:740;letter-spacing:-.03em;text-align:center;margin:0}
.features>.features-inner>p,.agents-inner>p{max-width:600px;margin:12px auto 0;font-size:15px;color:#a1a1a8;text-align:center;line-height:1.6}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:40px}
.grid4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:40px}
.glass-card{padding:26px 26px 28px;border-radius:20px;background:linear-gradient(135deg,rgba(94,94,102,.22),rgba(28,28,32,.14));border:1px solid rgba(255,255,255,.12);box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 20px 50px rgba(0,0,0,.35);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
.glass-card .t{font-size:17px;font-weight:700}
.glass-card p{margin:10px 0 0;font-size:13.5px;color:#a1a1a8;line-height:1.7}

/* 详情页：能力列表专用（任务清单 + 步骤卡） */
.task-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 20px;max-width:860px;margin:40px auto 0}
.task{display:flex;gap:10px;align-items:flex-start;padding:14px 16px;border-radius:14px;background:linear-gradient(135deg,rgba(94,94,102,.16),rgba(28,28,32,.1));border:1px solid rgba(255,255,255,.1);font-size:13.5px;color:#d5d5da;line-height:1.55}
.task::before{content:"✓";flex:0 0 auto;margin-top:1px;color:#ff9256;font-weight:700}
.step-card{position:relative}
.step-num{display:grid;place-items:center;width:32px;height:32px;margin-bottom:14px;border-radius:10px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);font-size:14px;font-weight:700;color:#f5f5f7}

.agents{padding:110px 24px 0}
.agents-inner{max-width:1120px;margin:0 auto}
.agent-card{display:block;padding:24px;border-radius:20px;background:linear-gradient(135deg,rgba(94,94,102,.22),rgba(28,28,32,.14));border:1px solid rgba(255,255,255,.12);box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 20px 50px rgba(0,0,0,.35);transition:border-color .16s ease}
.agent-card:hover{border-color:rgba(255,255,255,.28)}
.agent-icon{display:grid;place-items:center;width:52px;height:52px;border-radius:14px;background:#fff;overflow:hidden;box-shadow:0 10px 22px rgba(0,0,0,.35);margin:0}
.agent-icon i{display:block;background-position:center;background-repeat:no-repeat}
.agent-card .t{margin-top:16px;font-size:16px;font-weight:700}
.agent-card p{margin:8px 0 0;font-size:12.5px;color:#a1a1a8;line-height:1.65}
.agent-more{display:block;margin-top:14px;font-size:12.5px;font-weight:600;color:#e8e8ed}

.faq{padding:110px 24px 0}
.faq-inner{max-width:760px;margin:0 auto}
.faq-list{margin-top:32px;border-radius:20px;background:linear-gradient(135deg,rgba(94,94,102,.18),rgba(28,28,32,.12));border:1px solid rgba(255,255,255,.12);box-shadow:inset 0 1px 0 rgba(255,255,255,.1),0 20px 50px rgba(0,0,0,.3);padding:8px 26px;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
.faq-item{padding:18px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.faq-item:last-child{border-bottom:0}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;list-style:none;font-size:15px;font-weight:600;cursor:pointer}
.faq-item summary .plus{color:#77787e}
.faq-item p{margin:12px 0 4px;font-size:13.5px;color:#a1a1a8;line-height:1.75}

.download{padding:120px 24px 90px;text-align:center}
.download-band{max-width:1120px;margin:0 auto;padding:64px 40px;border-radius:26px;background:linear-gradient(150deg,rgba(255,146,86,.14),rgba(94,94,102,.16) 55%,rgba(28,28,32,.2));border:1px solid rgba(255,255,255,.14);box-shadow:inset 0 1px 0 rgba(255,255,255,.16),0 40px 100px rgba(0,0,0,.5);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
.download-band h2{margin:0;font-size:38px;font-weight:740;letter-spacing:-.035em}
.download-band>p{margin:14px auto 0;max-width:520px;font-size:16px;color:#a1a1a8;line-height:1.6}
.band-actions{display:flex;justify-content:center;gap:12px;margin-top:30px;flex-wrap:wrap}
.band-note{margin-top:22px;font-size:12.5px;color:#94949b}
.band-note--sub{margin-top:8px;font-size:12px;color:#77787e}

.icp-footer{padding:0 24px 40px;text-align:center}
.icp-footer .row{display:flex;align-items:center;justify-content:center;gap:10px;font-size:12px;color:#5c5c62}
.icp-footer img{width:16px;height:16px;border-radius:4px;opacity:.7}
.icp-footer a{color:#5c5c62}

/* 界面速览画廊 */
.shots-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px;margin-top:40px}
.shot-card{grid-column:span 2;margin:0;border-radius:16px;overflow:hidden;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);box-shadow:inset 0 1px 0 rgba(255,255,255,.1),0 24px 60px rgba(0,0,0,.42)}
.shot-card--wide{grid-column:span 3}
.shot-card img{display:block;width:100%;height:auto}
.shot-card figcaption{padding:12px 15px;font-size:13px;color:#c6c6cc;font-weight:600;border-top:1px solid rgba(255,255,255,.06)}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}

/* 测试阶段徽标 + 加群二维码 */
.community-badge{display:inline-block;margin-bottom:16px;padding:7px 16px;border-radius:99px;background:rgba(255,146,86,.16);border:1px solid rgba(255,146,86,.32);color:#ffb488;font-size:13px;font-weight:650;letter-spacing:.01em}
.community{margin:30px auto 0;padding-top:28px;border-top:1px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;gap:26px;flex-wrap:wrap;max-width:640px}
.community-qr{width:138px;height:138px;flex:none;border-radius:16px;background:#fff;padding:9px;box-shadow:0 14px 34px rgba(0,0,0,.4)}
.community-qr img{width:100%;height:100%;display:block;border-radius:9px;object-fit:contain}
.community-text{text-align:left;max-width:340px}
.community-text .ct-title{font-size:18px;font-weight:700}
.community-text .ct-sub{margin-top:9px;font-size:13.5px;color:#a1a1a8;line-height:1.75}
@media (max-width:560px){ .community{flex-direction:column;text-align:center} .community-text{text-align:center} }

@media (max-width:900px){
  .grid3,.grid4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .task-grid{grid-template-columns:1fr}
  .shots-grid{grid-template-columns:1fr}
  .shot-card,.shot-card--wide{grid-column:auto}
  .duo{grid-template-columns:1fr}
  h1{font-size:44px}
}
@media (max-width:560px){
  .grid3,.grid4{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;align-items:center}
  h1{font-size:36px}
  .nav-links{display:none}
}

/* 语言切换器（自原版 i18n 移植） */
.lang{display:flex;gap:4px;padding:3px;border-radius:99px;background:rgba(120,120,128,.16);border:1px solid rgba(255,255,255,.1);margin-right:10px}
.lang button{height:24px;padding:0 10px;border:0;border-radius:99px;background:transparent;color:#c6c6cc;font-size:11.5px;font-weight:600;cursor:pointer;font-family:inherit}
.lang button.active{background:rgba(255,255,255,.92);color:#111113}