/* ============================================================
   未冉｜企慧 · 基础样式（Notion/飞书 清爽浅色设计体系）
   设计令牌 → 基础元素 → 按钮 → 头部 → 聊天助手 → 详情弹窗
   ============================================================ */
:root{
  /* 色彩令牌 */
  --ink:#1f2329;          /* 主标题 */
  --body:#4e5969;         /* 正文 */
  --muted:#646a73;        /* 次要 */
  --faint:#8f959e;        /* 弱提示 */
  --line:#e5e6eb;         /* 分隔线 */
  --line-soft:#eff0f1;    /* 更浅分隔 */
  --bg:#ffffff;
  --bg-soft:#f7f8fa;      /* 浅灰区块 */
  --bg-mute:#f2f3f5;      /* 悬停灰 */
  --brand:#3370ff;        /* 主行动色 */
  --brand-hover:#295cd9;
  --brand-ink:#245bdb;    /* 文字链接蓝 */
  --brand-soft:#eef4ff;   /* 浅蓝底 */
  --brand-line:#d6e4ff;   /* 浅蓝边 */
  --green:#34a724;
  /* 圆角 / 阴影 */
  --r-s:6px;--r-m:8px;--r-l:12px;--r-xl:16px;
  --shadow-1:0 1px 2px rgba(31,35,41,.04),0 2px 8px rgba(31,35,41,.03);
  --shadow-2:0 6px 16px rgba(31,35,41,.06),0 16px 40px rgba(31,35,41,.08);
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--bg);scroll-behavior:smooth;scroll-padding-top:28px;
  -webkit-font-smoothing:antialiased;
}
*{box-sizing:border-box}
body{margin:0;font-size:14px;line-height:1.7}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
button{color:inherit;border:0;background:none;cursor:pointer;text-align:left}
button:disabled{cursor:default}
h1,h2,h3,p{margin:0}
svg.icon{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
[hidden]{display:none!important}
.icon-library{position:absolute;width:0;height:0;overflow:hidden}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.skip-link{position:fixed;top:-100px;left:16px;z-index:100;background:#fff;padding:12px;border:2px solid var(--ink);border-radius:var(--r-m)}
.skip-link:focus{top:12px}
.container{width:min(1280px,100%);padding:0 16px;margin-inline:auto}
.section-narrow{width:min(1248px,calc(100% - 48px));margin-inline:auto}

/* ---------- 按钮 ---------- */
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:9px 18px;border-radius:var(--r-m);font-size:14px;font-weight:500;line-height:1.5;transition:background .18s,border-color .18s,box-shadow .18s,transform .18s}
.button-dark,.small-dark{color:#fff;background:var(--brand);border:1px solid var(--brand)}
.button-dark:hover,.small-dark:hover{background:var(--brand-hover);border-color:var(--brand-hover);box-shadow:0 4px 12px rgba(51,112,255,.24)}
.button-dark:active,.small-dark:active{transform:translateY(1px)}
.button-outline{border:1px solid #dee0e3;background:#fff;color:var(--ink)}
.button-outline:hover{background:var(--bg-soft);border-color:#c9cdd4}
.button-light{background:var(--brand-soft);color:var(--brand-ink)}
.button-light:hover{background:#e0ecff}
.icon-button{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--r-s);flex-shrink:0;padding:6px;transition:background .15s}
.icon-button:hover{background:var(--bg-mute)}
.icon-button .icon{width:16px;height:16px}
.quiet-badge{font-size:11px;color:var(--muted);border:1px solid var(--line);background:var(--bg-soft);border-radius:var(--r-s);padding:2px 8px;font-weight:400;white-space:nowrap}
.small-dark{display:inline-flex;align-items:center;justify-content:center;font-size:12px;padding:6px 12px;min-height:30px;border-radius:var(--r-s);white-space:nowrap}
.tag{display:inline-flex;align-items:center;font-size:10px;padding:2px 6px;border-radius:var(--r-s);line-height:1.5;font-weight:400}
.amber{background:#fff7e6;color:#b25e09}
.blue{background:var(--brand-soft);color:var(--brand-ink)}
.violet{background:#f4f0fd;color:#6d54b5}
.green{background:#ebf7e8;color:#2b8a1e}
.rose{background:#fdeef2;color:#b5486e}
.slate{background:#eef2f7;color:#5b728e}
.tag-neutral{color:var(--faint);background:transparent;padding-left:0}
.color-dot,.library-dot{width:7px;height:7px;border-radius:2px;display:inline-block;flex-shrink:0}
.rose-dot{background:#d4709a}
.yellow-dot,.amber-dot{background:#d9a63f}
.blue-dot{background:var(--brand)}
.violet-dot{background:#8f6fd6}
.green-dot{background:#56a08c}

/* ---------- 头部导航 ---------- */
.site-header,.header-inner{height:64px;background:#fff}
.header-inner{max-width:1360px;margin:auto;padding:0 32px;display:flex;align-items:center;gap:26px}
.brand{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:16px;font-weight:700;letter-spacing:-.2px}
.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--brand);flex-shrink:0}
.brand-mark span{background:#79551c;border-radius:1px}
.brand-mark span:last-child{border-radius:50%}
.prototype-tag{font-size:10px;font-weight:400;border:1px solid var(--line);border-radius:var(--r-s);padding:2px 5px;color:var(--faint);letter-spacing:0}
.header-search{display:flex;align-items:center;gap:8px;width:260px;flex-shrink:1;min-width:130px;border:1px solid var(--line);border-radius:var(--r-m);padding:0 12px;height:36px;color:var(--faint);background:var(--bg-soft);transition:border-color .18s,background .18s,box-shadow .18s}
.header-search:hover{background:#fff;border-color:#c9cdd4}
.header-search .icon{width:15px;height:15px}
.header-search input{width:100%;min-width:0;border:0;background:none;color:var(--ink);outline:none;font-size:13px}
.header-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(51,112,255,.12)}
.header-search input:focus-visible{outline:none}
.header-search input::placeholder{color:#a9aeb8}
.header-search kbd{font-family:inherit;font-size:10px;border:1px solid var(--line);color:#a9aeb8;border-radius:4px;padding:1px 5px;background:#fff}
#site-nav{margin-left:auto;display:flex;align-items:center;gap:24px;font-size:13px;white-space:nowrap;color:var(--body)}
#site-nav>a{display:flex;align-items:center;gap:6px;min-height:40px;transition:color .15s}
#site-nav>a:hover{color:var(--brand-ink)}
#site-nav .icon{width:15px;height:15px;color:#a9aeb8}
.nav-cta{border-radius:var(--r-m);padding:6px 16px;min-height:34px;font-size:13px}
.menu-toggle{display:none}

/* ---------- AI 咨询助手 ---------- */
.chat-launcher{position:fixed;z-index:30;right:24px;bottom:24px;display:flex;align-items:center;justify-content:center;gap:8px;min-width:52px;height:52px;padding:0 18px;border-radius:999px;background:var(--brand);color:#fff;box-shadow:0 6px 20px rgba(51,112,255,.32);font-size:13px;font-weight:500;transition:background .18s,transform .18s,box-shadow .18s}
.chat-launcher:hover{background:var(--brand-hover);transform:translateY(-2px);box-shadow:0 10px 28px rgba(51,112,255,.38)}
.chat-launcher>.icon{width:22px;height:22px}
.chat-panel{position:fixed;right:20px;bottom:20px;z-index:40;width:448px;height:780px;max-height:calc(100dvh - 40px);border:1px solid var(--line);border-radius:var(--r-xl);background:#fff;color:var(--ink);box-shadow:var(--shadow-2);display:flex;flex-direction:column;overflow:hidden}
.chat-panel.maximized{width:min(820px,calc(100% - 40px));height:calc(100dvh - 40px)}
.chat-header{display:flex;align-items:center;padding:18px 14px 16px 22px;min-height:64px;position:relative;flex-shrink:0;border-bottom:1px solid var(--line-soft)}
.chat-header h2{font-size:16px;font-weight:600;letter-spacing:-.2px;margin-right:auto}
.chat-header-actions{display:flex;align-items:center;gap:2px}
.chat-header .icon-button{width:30px;height:30px;color:var(--muted)}
.chat-header .icon{width:16px;height:16px}
.chat-options-toggle{font-size:20px;font-weight:600;padding-bottom:14px}
.chat-options{position:absolute;right:16px;top:56px;background:#fff;box-shadow:var(--shadow-2);border:1px solid var(--line);border-radius:var(--r-m);padding:5px;z-index:2;min-width:185px}
.chat-options>button{display:block;width:100%;padding:10px 12px;font-size:13px;border-radius:var(--r-s);color:var(--body)}
.chat-options>button:hover{background:var(--bg-mute)}
.chat-options>span{display:block;font-size:10px;color:var(--faint);padding:9px 12px;border-top:1px solid var(--line-soft)}
.chat-messages{padding:26px 28px 18px;flex:1;min-height:0;overflow:auto;overscroll-behavior:contain}
.chat-welcome h3{font-size:15px;font-weight:600;line-height:1.7}
.chat-welcome>p{font-size:13px;font-weight:400;line-height:1.8;color:var(--muted);margin-top:6px}
.chat-suggestions{display:flex;flex-direction:column;align-items:flex-start;gap:8px;margin-top:24px}
.chat-suggestions button{display:flex;align-items:center;gap:9px;background:var(--bg-soft);border:1px solid var(--line-soft);border-radius:10px;padding:9px 13px;min-height:38px;font-size:13px;line-height:1.5;max-width:100%;transition:border-color .15s,background .15s,color .15s}
.chat-suggestions button:hover{background:#fff;border-color:var(--brand-line);color:var(--brand-ink)}
.chat-suggestions .icon{width:15px;height:15px;order:-1;color:var(--faint)}
.chat-form{padding:0 20px 14px;flex-shrink:0}
.chat-input-row{min-height:104px;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-1);display:flex;align-items:flex-end;gap:8px;padding:14px 12px 13px 18px;transition:border-color .18s,box-shadow .18s}
.chat-input-row:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(51,112,255,.12)}
.chat-input-row textarea{width:100%;resize:none;border:0;background:none;outline:none;font-size:13px;line-height:1.8;padding:2px 0;min-height:64px;max-height:130px;color:var(--ink)}
.chat-input-row textarea:focus-visible{outline:none}
.chat-input-row textarea::placeholder{color:#a9aeb8}
.send-button{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:var(--brand);color:#fff;flex-shrink:0;transition:background .15s}
.send-button:hover:not(:disabled){background:var(--brand-hover)}
.send-button:disabled{background:var(--bg-mute);color:#bbbfc7}
.send-button>.icon{width:17px;height:17px}
.chat-form>p{text-align:center;color:var(--faint);font-size:10px;line-height:1.6;margin:8px 0 0}
.message{font-size:13px;line-height:1.9;margin-top:18px;overflow-wrap:anywhere}
.message.user{white-space:pre-wrap;margin-left:28px;padding:10px 14px;border-radius:12px 12px 4px 12px;background:var(--brand-soft);color:var(--ink)}
.message.assistant{margin-right:8px}
.message-label{font-size:10px;font-weight:600;display:flex;align-items:center;gap:5px;color:var(--muted);margin-bottom:6px}
.message-label>.icon{width:12px;height:12px;color:var(--brand)}
.message-copy{white-space:pre-wrap}
.message-disclaimer{font-size:10px;line-height:1.8;color:var(--faint);margin-top:10px;border-top:1px solid var(--line-soft);padding-top:8px}
.message-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.message-links button{font-size:12px;border:1px solid var(--line);border-radius:var(--r-m);padding:6px 12px;min-height:32px;transition:border-color .15s,color .15s}
.message-links button:hover{border-color:var(--brand);color:var(--brand-ink)}

/* ---------- 详情弹窗 ---------- */
.detail-dialog{width:min(660px,calc(100% - 32px));max-height:85dvh;border:1px solid var(--line);padding:26px 30px 30px;border-radius:var(--r-xl);color:var(--ink);box-shadow:0 24px 80px rgba(16,24,40,.16);overscroll-behavior:contain}
.detail-dialog::backdrop{background:rgba(16,24,40,.4);backdrop-filter:blur(4px)}
.dialog-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.dialog-top>.icon-button{margin:-8px -10px -8px 0}
.detail-dialog h2{font-size:24px;font-weight:600;letter-spacing:-.5px;line-height:1.4;margin-bottom:10px}
.dialog-description{font-size:14px;color:var(--muted);line-height:1.9}
.dialog-notice{font-size:12px;line-height:1.9;background:#fff7e6;border:1px solid #ffe7ba;color:#8a5a19;padding:12px 14px;border-radius:var(--r-m);margin:18px 0}
.detail-dialog h3{font-size:14px;font-weight:600;margin:22px 0 10px}
.detail-dialog ul,.detail-dialog ol{padding-left:20px;font-size:13px;color:var(--body);line-height:2}
.dialog-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.dialog-actions .button{font-size:13px}
.detail-dialog details{border-bottom:1px solid var(--line-soft);padding:12px 0}
.detail-dialog summary{font-size:13px;cursor:pointer;line-height:1.8;font-weight:500}
.detail-dialog details p{font-size:12px;line-height:1.9;color:var(--muted);margin:10px 0}
.dialog-checklist{background:var(--bg-soft);padding:16px 20px;border:1px solid var(--line-soft);border-radius:var(--r-m)}
.dialog-checklist ul{margin:0}
.source-link{display:inline-flex;font-size:12px;color:var(--brand-ink);line-height:1.8;text-decoration:underline;text-underline-offset:3px;text-decoration-color:#b9ccf5;margin-top:15px}
.source-link:hover{text-decoration-color:var(--brand)}
.version-table{border-collapse:collapse;font-size:12px;width:100%;margin:15px 0;color:var(--body);line-height:1.8}
.version-table td,.version-table th{padding:10px;border:1px solid var(--line);text-align:left}
.version-table th{background:var(--bg-soft);font-weight:500}
.dialog-source-note{font-size:10px;color:var(--faint);line-height:1.8;margin-top:15px}