/* 奈势AI 沙盒站 · 样式
   只用 tokens-v1.3.2.css 的语义变量 --nx-color-*，不硬编码近似色。
   卡片 1px 边框、不用常规阴影；网页标题字重 600；字体 MiSans。 */
@import url("../fonts/misans.css");
@import url("../icons/phosphor-regular.css");

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--nx-font-family-body);font-size:15px;line-height:1.6;color:var(--nx-color-text-primary);background:var(--nx-color-background-body);-webkit-font-smoothing:antialiased}
a{color:var(--nx-color-text-accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-weight:var(--nx-font-weight-semibold);margin:0;line-height:1.35}
button{font:inherit}
:focus-visible{outline:3px solid var(--nx-color-border-accent,rgba(104,87,231,.3));outline-offset:2px;border-radius:6px}
.ph{line-height:1}

/* ---------- 外壳：侧栏 + 主区 ---------- */
.app{display:flex;min-height:100vh}
.sidebar{position:sticky;top:0;height:100vh;width:176px;flex:none;background:var(--nx-color-background-surface);border-right:1px solid var(--nx-color-border);display:flex;flex-direction:column;padding:16px 12px;z-index:30}
.sidebar .brand{display:flex;align-items:center;height:40px;padding:0 6px;margin-bottom:16px}
.sidebar .brand img{height:24px;width:auto}
.logo-dark{display:none!important}
[data-theme="dark"] .logo-light{display:none!important}
[data-theme="dark"] .logo-dark{display:block!important}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .logo-light{display:none!important}:root:not([data-theme="light"]) .logo-dark{display:block!important}}
.nav{display:flex;flex-direction:column;gap:2px}
.nav a{display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;border-radius:var(--nx-radius-control);color:var(--nx-color-text-primary);font-size:15px}
.nav a .ph{font-size:20px;color:var(--nx-color-icon-secondary)}
.nav a:hover{text-decoration:none;background:var(--nx-color-background-muted)}
.nav a[aria-current="page"]{background:var(--nx-color-accent-muted);color:var(--nx-color-on-accent-muted);font-weight:500}
.nav a[aria-current="page"] .ph{color:var(--nx-color-on-accent-muted)}
.nav .badge-new{margin-left:auto;font-size:12px;line-height:20px;padding:0 6px;border-radius:999px;background:var(--nx-color-accent-muted);color:var(--nx-color-on-accent-muted)}
.sidebar .side-foot{margin-top:auto;display:flex;flex-direction:column;gap:8px}
.btn-theme{display:flex;align-items:center;gap:8px;height:40px;padding:0 12px;border:1px solid var(--nx-color-border);border-radius:var(--nx-radius-control);background:transparent;color:var(--nx-color-text-secondary);cursor:pointer;font-size:13px}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.sandbox-bar{font-size:13px;color:var(--nx-color-text-secondary);background:var(--nx-color-background-muted);border-bottom:1px solid var(--nx-color-border);padding:8px 24px}
.sandbox-bar .ph{font-size:16px;vertical-align:-3px;margin-right:6px}
.more-wrap{display:flex;justify-content:center;margin-top:20px}
.topbar{display:none}
.page{width:100%;max-width:1240px;margin:0 auto;padding:32px 32px 64px}

/* 中屏：图标栏 64px */
@media (max-width:1080px){
  .sidebar{width:64px;padding:16px 8px}
  .sidebar .brand{justify-content:center;padding:0}
  .sidebar .brand .logo-full{display:none!important}
  .sidebar .brand .logo-mark{display:block!important;height:28px}
  .nav a{justify-content:center;padding:0}
  .nav a span.label,.nav .badge-new,.btn-theme span{display:none}
  .btn-theme{justify-content:center;padding:0}
}
.logo-mark{display:none!important}
/* 移动端：顶栏 58px + 抽屉 */
@media (max-width:720px){
  .app{display:block}
  .sidebar{position:fixed;left:0;top:0;width:248px;height:100%;transform:translateX(-100%);transition:transform .24s;padding:16px 12px}
  .sidebar.open{transform:none;box-shadow:var(--nx-shadow-floating)}
  .sidebar .brand{justify-content:flex-start;padding:0 6px}
  .sidebar .brand .logo-full.logo-light{display:block!important}
  .sidebar .brand .logo-mark{display:none!important}
  [data-theme="dark"] .sidebar .brand .logo-full.logo-light{display:none!important}
  [data-theme="dark"] .sidebar .brand .logo-full.logo-dark{display:block!important}
  .nav a{justify-content:flex-start;padding:0 12px}
  .nav a span.label,.nav .badge-new,.btn-theme span{display:inline}
  .btn-theme{justify-content:flex-start;padding:0 12px}
  .topbar{display:flex;position:sticky;top:0;z-index:20;height:58px;align-items:center;justify-content:center;background:var(--nx-color-background-surface);border-bottom:1px solid var(--nx-color-border)}
  .topbar img{height:24px}
  .topbar .menu-btn{position:absolute;left:8px;top:7px;width:44px;height:44px;border:0;background:transparent;color:var(--nx-color-text-primary);font-size:24px;display:flex;align-items:center;justify-content:center;cursor:pointer}
  .scrim{position:fixed;inset:0;background:var(--nx-color-overlay,rgba(0,0,0,.4));z-index:25;display:none}
  .scrim.show{display:block}
  .page{padding:20px 16px 48px}
  .sandbox-bar{padding:8px 16px;font-size:12px}
  @media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .sidebar .brand .logo-full.logo-light{display:none!important}:root:not([data-theme="light"]) .sidebar .brand .logo-full.logo-dark{display:block!important}}
}

/* ---------- 通用组件 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:44px;padding:0 20px;border-radius:var(--nx-radius-control);border:1px solid transparent;font-size:15px;font-weight:500;cursor:pointer;transition:background .18s,transform .1s;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--nx-color-accent);color:var(--nx-color-on-accent)}
.btn-primary:hover{background:var(--nx-color-accent-hover)}
.btn-primary:active{background:var(--nx-color-accent-pressed)}
.btn-secondary{background:var(--nx-color-background-card);color:var(--nx-color-text-primary);border-color:var(--nx-color-border-emphasized,var(--nx-color-border))}
.btn-secondary:hover{background:var(--nx-color-background-muted)}
.link-more{flex:none;white-space:nowrap;display:inline-flex;align-items:center;gap:2px;font-size:14px;color:var(--nx-color-text-accent)}
.section{margin-top:40px}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px}
.section-head h2{font-size:22px}
.section-head p{margin:4px 0 0;color:var(--nx-color-text-secondary);font-size:14px}
.card{background:var(--nx-color-background-card);border:1px solid var(--nx-color-border);border-radius:var(--nx-radius-card)}
.chip{display:inline-flex;align-items:center;gap:4px;height:24px;padding:0 8px;border-radius:999px;font-size:12px;background:var(--nx-color-background-muted);color:var(--nx-color-text-secondary);white-space:nowrap}
.chip-purple{background:var(--nx-color-accent-muted);color:var(--nx-color-on-accent-muted)}
.empty{padding:40px 16px;text-align:center;color:var(--nx-color-text-secondary);font-size:14px}
.empty img{width:96px;margin:0 auto 8px}
.muted{color:var(--nx-color-text-secondary)}
.footer{border-top:1px solid var(--nx-color-border);background:var(--nx-color-background-surface);padding:28px 32px;font-size:13px;color:var(--nx-color-text-secondary)}
.footer .inner{max-width:1240px;margin:0 auto;display:flex;flex-wrap:wrap;gap:16px 32px;align-items:center;justify-content:space-between}
.footer img{height:24px}
.footer .slogan{color:var(--nx-color-text-primary)}
@media (max-width:720px){.footer{padding:24px 16px}}

/* ---------- 首页 ---------- */
.hero{text-align:center;padding:24px 0 8px}
.hero h1{font-size:34px;display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.hero h1 img{height:76px;width:auto}
.chatbox{max-width:760px;margin:20px auto 0;text-align:left;padding:14px 16px}
.chatbox textarea{width:100%;border:0;resize:none;background:transparent;font:inherit;color:var(--nx-color-text-primary);min-height:56px;outline:none}
.chatbox textarea::placeholder{color:var(--nx-color-text-secondary)}
.chatbox .row{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--nx-color-text-secondary)}
.chatbox .row span{display:inline-flex;align-items:center;gap:4px;margin-right:16px}
.send{width:36px;height:36px;border-radius:50%;border:1px solid var(--nx-color-border);background:var(--nx-color-background-muted);color:var(--nx-color-icon-secondary);display:flex;align-items:center;justify-content:center}
.quick{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:16px auto 0;max-width:760px}
.quick a{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 14px;border:1px solid var(--nx-color-border);border-radius:999px;background:var(--nx-color-background-card);color:var(--nx-color-text-primary);font-size:13px}
.quick a:hover{text-decoration:none;border-color:var(--nx-color-border-accent,var(--nx-color-accent))}
.grid{display:grid;gap:16px}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:1080px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:720px){.grid-3,.grid-4{grid-template-columns:1fr}.hero h1{font-size:24px;gap:8px}.hero h1 img{height:56px}}
.col-card{overflow:hidden;display:flex;flex-direction:column;color:inherit}
.col-card:hover{text-decoration:none;border-color:var(--nx-color-border-accent,var(--nx-color-accent))}
.col-card .cover{aspect-ratio:16/9;object-fit:cover;width:100%;background:var(--nx-color-background-muted)}
.col-card .body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px;flex:1}
.col-card h3{font-size:16px}
.col-card p{margin:0;font-size:13px;color:var(--nx-color-text-secondary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.col-card .meta{margin-top:auto;display:flex;gap:6px;flex-wrap:wrap}
.proj-card{padding:16px;display:flex;flex-direction:column;gap:10px;color:inherit}
.proj-card:hover{text-decoration:none;border-color:var(--nx-color-border-accent,var(--nx-color-accent))}
.proj-card .ph-box{width:40px;height:40px;border-radius:10px;background:var(--nx-color-accent-muted);color:var(--nx-color-on-accent-muted);display:flex;align-items:center;justify-content:center;font-size:22px}
.proj-card h3{font-size:15px}
.proj-card p{margin:0;font-size:13px;color:var(--nx-color-text-secondary);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- 资讯 ---------- */
.news-head{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
.news-head h1{font-size:30px}
.news-head p{margin:8px 0 0;color:var(--nx-color-text-secondary);max-width:640px}
.news-head .mascot{width:132px;height:auto}
@media (max-width:720px){.news-head{grid-template-columns:1fr auto;gap:12px}.news-head h1{font-size:24px}.news-head .mascot{width:72px}}
.brief{margin-top:24px;background:var(--nx-color-background-inverted);color:var(--nx-color-on-dark,#F6F6F8);border-radius:var(--nx-radius-panel);padding:24px 28px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:28px}
[data-theme="dark"] .brief{background:var(--nx-color-background-card);color:var(--nx-color-text-primary);border:1px solid var(--nx-color-border)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .brief{background:var(--nx-color-background-card);color:var(--nx-color-text-primary);border:1px solid var(--nx-color-border)}}
.brief .tag-today{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;background:var(--nx-color-highlight);color:var(--nx-color-on-highlight);font-size:13px;font-weight:500}
.brief h2{font-size:24px;margin:12px 0 8px;color:inherit}
.brief .lede{margin:0 0 16px;opacity:.86;font-size:14px}
.brief ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.brief li a{display:grid;grid-template-columns:32px 1fr;gap:8px;padding:12px;border-radius:12px;color:inherit}
.brief li a:hover{text-decoration:none;background:rgba(246,246,248,.08)}
.brief .num{font-size:20px;font-weight:600;color:var(--nx-lavender,#BBBBFE);line-height:1.3}
.brief li h3{font-size:16px;color:inherit}
.brief li p{margin:4px 0 0;font-size:13px;opacity:.86}
.brief .src{font-size:12px;opacity:.72;margin-top:4px}
@media (max-width:860px){.brief{grid-template-columns:1fr;gap:12px;padding:20px 16px}}
.tabs{display:flex;gap:4px;overflow-x:auto;margin-top:32px;border-bottom:1px solid var(--nx-color-border);scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs button{flex:none;height:44px;padding:0 14px;border:0;background:transparent;color:var(--nx-color-text-secondary);font-size:15px;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}
.tabs button[aria-selected="true"]{color:var(--nx-color-text-primary);font-weight:600;border-bottom-color:var(--nx-color-accent)}
.tabs .count{font-size:12px;margin-left:4px;color:var(--nx-color-text-secondary)}
.filters{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;margin:16px 0 20px}
.filter-group{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.filter-group .lbl{flex:none;white-space:nowrap;font-size:13px;color:var(--nx-color-text-secondary);margin-right:2px}
.fbtn{height:32px;padding:0 12px;border-radius:999px;border:1px solid var(--nx-color-border);background:var(--nx-color-background-card);color:var(--nx-color-text-primary);font-size:13px;cursor:pointer;display:inline-flex;align-items:center;gap:4px}
.fbtn[aria-pressed="true"]{background:var(--nx-color-accent-muted);color:var(--nx-color-on-accent-muted);border-color:transparent;font-weight:500}
.fbtn .n{font-size:12px;opacity:.75}
.search{margin-left:auto;position:relative}
.search input{height:36px;width:220px;border:1px solid var(--nx-color-border);border-radius:999px;background:var(--nx-color-background-card);color:var(--nx-color-text-primary);padding:0 12px 0 34px;font:inherit;font-size:13px}
.search .ph{position:absolute;left:12px;top:10px;color:var(--nx-color-icon-secondary)}
@media (max-width:720px){.search{margin-left:0;width:100%}.search input{width:100%}.filters{gap:10px}.filter-group{flex-wrap:nowrap;overflow-x:auto;width:100%;scrollbar-width:none}.filter-group::-webkit-scrollbar{display:none}.fbtn{flex:none}}
.news-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
@media (max-width:900px){.news-grid{grid-template-columns:1fr}}
.ncard{padding:18px 20px;display:flex;flex-direction:column;gap:10px;color:inherit;position:relative}
.ncard:hover{border-color:var(--nx-color-border-accent,var(--nx-color-accent))}
.ncard .meta{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--nx-color-text-secondary);flex-wrap:wrap}
.ncard .meta .src{display:inline-flex;align-items:center;gap:4px;color:var(--nx-color-text-primary);font-weight:500}
.ncard .meta .src .ph{font-size:16px}
.ncard .meta .dot{width:3px;height:3px;border-radius:50%;background:currentColor;opacity:.5}
.ncard h3{font-size:17px}
.ncard h3 a{color:var(--nx-color-text-primary)}
.ncard h3 a::after{content:"";position:absolute;inset:0}
.ncard .sum{margin:0;font-size:14px;color:var(--nx-color-text-secondary);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.why{background:var(--nx-color-accent-muted);color:var(--nx-color-on-accent-muted);border-radius:12px;padding:10px 12px;font-size:13px;line-height:1.6}
.why b{font-weight:600;margin-right:4px}
.ncard .foot{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:2px}
.ncard .foot .orig{margin-left:auto;position:relative;z-index:1;display:inline-flex;align-items:center;gap:2px;font-size:13px;min-height:32px}
.source-note{margin-top:32px;padding:16px 20px;font-size:13px;color:var(--nx-color-text-secondary)}
.source-note h3{font-size:14px;color:var(--nx-color-text-primary);margin-bottom:6px}
.source-note ul{margin:0;padding-left:18px}

/* 详情页 */
.article{max-width:760px;margin:0 auto}
.crumb{font-size:13px;color:var(--nx-color-text-secondary);display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.crumb a{color:var(--nx-color-text-secondary)}
.article h1{font-size:30px;margin:12px 0 12px}
@media (max-width:720px){.article h1{font-size:23px}}
.article .meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13px;color:var(--nx-color-text-secondary)}
.article .lead{font-size:17px;line-height:1.8;margin:20px 0}
.article .why{font-size:15px;padding:14px 16px}
.article h2{font-size:18px;margin:28px 0 10px}
.article ul.points{margin:0;padding-left:20px;line-height:1.9}
.origin{margin-top:28px;padding:18px 20px;display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.origin .t{font-size:14px}
.origin .t .ot{color:var(--nx-color-text-secondary);font-size:13px;margin-top:2px;word-break:break-word}
.disclaimer{font-size:12px;color:var(--nx-color-text-secondary);margin-top:16px}
.related{margin-top:36px}
.related .list{display:flex;flex-direction:column;gap:8px}
.related a.item{display:block;padding:12px 16px;color:var(--nx-color-text-primary)}
.related a.item:hover{text-decoration:none;border-color:var(--nx-color-border-accent,var(--nx-color-accent))}
.related .item small{display:block;color:var(--nx-color-text-secondary);font-size:12px;margin-top:2px}

/* 次级页（副本占位） */
.stub{display:grid;grid-template-columns:1fr 220px;gap:24px;align-items:center;padding:32px}
.stub h1{font-size:26px}
.stub p{color:var(--nx-color-text-secondary)}
@media (max-width:720px){.stub{grid-template-columns:1fr;padding:20px}.stub img{width:140px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}