/* ============================================================
   AI中枢 NovaHub · 设计系统 base.css
   移动端优先 · 强手机适配 · 蓝紫渐变科技风
   ============================================================ */

:root{
  --primary:#3D5AFE;         /* 主蓝 */
  --primary-2:#7C4DFF;       /* 主蓝渐变副色（蓝→紫） */
  --primary-deep:#2A3EB1;
  --violet:#7C4DFF;          /* 紫 */
  --cyan:#00B4FF;
  --grad-main:linear-gradient(135deg,#3D5AFE 0%,#7C4DFF 60%,#B388FF 100%);
  --grad-hero:linear-gradient(180deg,#EEF2FF 0%,#F7F8FF 40%,#FFFFFF 100%);
  --grad-text:linear-gradient(90deg,#3D5AFE,#7C4DFF 55%,#00B4FF);
  --grad-card:linear-gradient(150deg,#4257F5 0%,#7A4DF8 100%);
  --bg:#F6F7FB; --bg-soft:#EEF1FA; --card:#FFFFFF;
  --ink:#16192B; --ink-2:#4A4F6A; --ink-3:#8A90AB; --line:#E7EAF6;
  --ok:#0FB37B; --warn:#F59E0B; --err:#EF4444; --info:#3D5AFE;
  --shadow-s:0 2px 8px rgba(35,46,143,.06);
  --ease:cubic-bezier(.22,1,.3,1);
  --shadow-m:0 8px 24px rgba(35,46,143,.10);
  --shadow-l:0 16px 48px rgba(35,46,143,.16);
  --r-s:10px; --r-m:14px; --r-l:20px; --r-xl:28px;
  --nav-h:64px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","MiSans","Noto Sans SC","Microsoft YaHei",sans-serif;
  --mono:"SF Mono","JetBrains Mono",Consolas,monospace;
}

*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{font-size:16px;scroll-behavior:smooth}
@media(max-width:480px){html{font-size:15px}}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;outline:none}
ul,ol{list-style:none}
::selection{background:rgba(61,90,254,.18)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:#C9CFE8;border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:#AAB4D8}
::-webkit-scrollbar-track{background:transparent}
*{scrollbar-width:thin;scrollbar-color:#C9CFE8 transparent}
.grad-text{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- 容器 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(max-width:768px){.container{padding:0 16px}}

/* ---------- 顶部导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:900;height:var(--nav-h);
  display:flex;align-items:center;background:rgba(255,255,255,.82);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(231,234,246,.8);transition:box-shadow .3s}
.nav.scrolled{box-shadow:var(--shadow-s)}
.nav-inner{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;
  display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;letter-spacing:.5px;flex-shrink:0}
.brand .logo{width:34px;height:34px;border-radius:10px;background:var(--grad-main);
  display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(90,70,255,.35)}
.brand .logo svg{width:20px;height:20px}
.brand small{font-weight:600;color:var(--ink-3);font-size:.68rem;display:block;letter-spacing:1px}
.nav-links{display:flex;gap:6px;margin-left:12px;flex:1}
.nav-links a{padding:8px 14px;border-radius:10px;font-size:.95rem;color:var(--ink-2);
  font-weight:500;transition:.2s;white-space:nowrap}
.nav-links a:hover{color:var(--primary);background:rgba(61,90,254,.07)}
.nav-links a.active{color:var(--primary);background:rgba(61,90,254,.1);font-weight:700}
.nav-act{display:flex;align-items:center;gap:10px;flex-shrink:0;margin-left:auto}
@media(max-width:900px){
  .nav-links{position:fixed;inset:var(--nav-h) 0 auto 0;background:#fff;flex-direction:column;
    padding:10px 16px 20px;gap:4px;margin:0;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-m);transform:translateY(-130%);transition:transform .35s cubic-bezier(.22,1,.3,1);z-index:-1}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:13px 14px;font-size:1rem;border-radius:12px}
  .nav-burger{display:flex!important}
}
.nav-burger{display:none;width:40px;height:40px;border-radius:10px;align-items:center;
  justify-content:center;color:var(--ink);margin-left:4px}
.nav-burger svg{width:22px;height:22px}
.nav-ghost{padding:8px 18px;border-radius:999px;font-size:.92rem;color:var(--ink-2);font-weight:600}
.nav-ghost:hover{color:var(--primary)}
/* 响应式显示工具类：hide-m 移动端隐藏 / hide-d 桌面端隐藏 */
@media(max-width:760px){.hide-m{display:none!important}}
@media(min-width:761px){.hide-d{display:none!important}}
.user-chip{display:flex;align-items:center;gap:8px;padding:5px 12px 5px 5px;border-radius:999px;
  border:1px solid var(--line);background:#fff;transition:.2s;max-width:180px}
.user-chip:hover{border-color:var(--primary);box-shadow:var(--shadow-s)}
.avatar{width:30px;height:30px;border-radius:50%;background:var(--grad-main);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.8rem;flex-shrink:0;
  object-fit:cover}
.user-chip span{font-size:.88rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media(max-width:420px){.user-chip span{display:none}.user-chip{padding:4px}}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:12px;font-weight:700;font-size:.95rem;
  transition:.22s;border:1px solid transparent;white-space:nowrap;user-select:none}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--grad-main);color:#fff;box-shadow:0 6px 18px rgba(80,70,255,.32)}
.btn-primary:hover{box-shadow:0 10px 26px rgba(80,70,255,.45);transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-soft{background:rgba(61,90,254,.09);color:var(--primary)}
.btn-soft:hover{background:rgba(61,90,254,.16)}
.btn-danger{background:rgba(239,68,68,.1);color:var(--err)}
.btn-danger:hover{background:rgba(239,68,68,.18)}
.btn-danger-soft{background:rgba(239,68,68,.09);color:#DC2626;border:1px solid rgba(239,68,68,.3)}
.btn-danger-soft:hover{background:rgba(239,68,68,.16)}
.btn-ok{background:var(--ok);color:#fff}
.btn-lg{padding:14px 30px;font-size:1.05rem;border-radius:14px}
.btn-sm{padding:7px 14px;font-size:.85rem;border-radius:9px}
.btn-blk{width:100%}
.btn[disabled]{opacity:.55;pointer-events:none}

/* ---------- 徽章 / 标签 ---------- */
.tag{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:999px;
  font-size:.75rem;font-weight:600;background:rgba(61,90,254,.1);color:var(--primary)}
.tag.violet{background:rgba(124,77,255,.12);color:var(--violet)}
.tag.ok{background:rgba(15,179,123,.12);color:var(--ok)}
.tag.warn{background:rgba(245,158,11,.14);color:#B45309}
.tag.err{background:rgba(239,68,68,.12);color:var(--err)}
.tag.gray{background:#F0F2F9;color:var(--ink-3)}
.dot{width:7px;height:7px;border-radius:50%;background:currentColor;display:inline-block}

/* ---------- 卡片 ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--shadow-s)}
.card-hov{transition:.3s cubic-bezier(.22,1,.3,1)}
.card-hov:hover{transform:translateY(-5px);box-shadow:var(--shadow-m);border-color:rgba(61,90,254,.35)}

/* ---------- 输入 ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:.86rem;font-weight:600;color:var(--ink-2);margin-bottom:7px}
.input{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;
  background:#fff;transition:.2s;font-size:.95rem}
.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(61,90,254,.12)}
.input::placeholder{color:#B0B6CE}
textarea.input{resize:vertical;min-height:90px}
select.input{appearance:none;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238A90AB' stroke-width='2.4'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 12px center}
.switch{position:relative;width:42px;height:24px;background:#D7DBEE;border-radius:99px;transition:.25s;flex-shrink:0;cursor:pointer}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;transition:.25s;box-shadow:0 1px 4px rgba(0,0,0,.2)}
.switch.on{background:var(--primary)}
.switch.on::after{left:21px}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--r-m);border:1px solid var(--line);background:#fff}
table.tbl{width:100%;border-collapse:collapse;font-size:.88rem;min-width:640px}
.tbl th{background:#F4F6FC;color:var(--ink-3);font-weight:600;text-align:left;padding:11px 14px;
  white-space:nowrap;font-size:.8rem;letter-spacing:.3px}
.tbl td{padding:12px 14px;border-top:1px solid var(--line);color:var(--ink-2);vertical-align:middle}
.tbl tr:hover td{background:#FAFBFF}
.tbl .strong{color:var(--ink);font-weight:700}

/* ---------- 分页 ---------- */
.pager{display:flex;gap:8px;align-items:center;justify-content:flex-end;margin-top:14px;flex-wrap:wrap}
.pager button{min-width:34px;height:34px;border-radius:9px;border:1px solid var(--line);
  background:#fff;color:var(--ink-2);font-weight:600;font-size:.85rem}
.pager button.cur{background:var(--grad-main);color:#fff;border-color:transparent}
.pager button[disabled]{opacity:.4}

/* ---------- 空状态 ---------- */
.empty{padding:48px 20px;text-align:center;color:var(--ink-3)}
.empty svg{width:64px;height:64px;margin:0 auto 14px;opacity:.5}
.empty p{font-size:.92rem}

/* ---------- Toast ---------- */
#toasts{position:fixed;top:76px;left:50%;transform:translateX(-50%);z-index:2000;
  display:flex;flex-direction:column;gap:10px;align-items:center;width:max-content;max-width:92vw}
.toast{padding:11px 20px;border-radius:12px;background:#1E2235;color:#fff;font-size:.9rem;
  font-weight:600;box-shadow:var(--shadow-l);display:flex;gap:8px;align-items:center;
  animation:toastIn .3s cubic-bezier(.22,1,.3,1);max-width:92vw}
.toast.ok{background:linear-gradient(135deg,#0FB37B,#0E9F6E)}
.toast.err{background:linear-gradient(135deg,#EF4444,#DC2626)}
.toast.info{background:linear-gradient(135deg,#3D5AFE,#7C4DFF)}
@keyframes toastIn{from{opacity:0;transform:translateY(-14px) scale(.94)}to{opacity:1;transform:none}}
.toast.out{animation:toastOut .3s forwards}
@keyframes toastOut{to{opacity:0;transform:translateY(-10px) scale(.96)}}

/* ---------- 弹窗 ---------- */
.modal-mask{position:fixed;inset:0;background:rgba(18,22,48,.5);backdrop-filter:blur(6px);
  z-index:1500;display:flex;align-items:center;justify-content:center;padding:20px;
  opacity:0;pointer-events:none;transition:.25s}
.modal-mask.show{opacity:1;pointer-events:auto}
.modal{background:#fff;border-radius:var(--r-l);width:100%;max-width:520px;max-height:88vh;
  overflow:auto;box-shadow:var(--shadow-l);transform:translateY(24px) scale(.97);transition:.28s cubic-bezier(.22,1,.3,1)}
.modal-mask.show .modal{transform:none}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px 0}
.modal-head h3{font-size:1.1rem;font-weight:800}
.modal-x{width:32px;height:32px;border-radius:9px;display:flex;align-items:center;justify-content:center;color:var(--ink-3)}
.modal-x:hover{background:var(--bg-soft);color:var(--ink)}
.modal-body{padding:18px 22px 22px}
/* 弹窗内图标条目（模型选择/列表类弹窗通用）：SVG 无固有尺寸会撑满容器，必须显式约束 */
.modal .mi{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:11px;cursor:pointer;transition:.15s}
.modal .mi:hover{background:var(--bg-soft)}
.modal .mi.cur{background:rgba(61,90,254,.08)}
.modal .mi .ic{width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#fff;overflow:hidden}
.modal .mi .ic svg{width:17px;height:17px;flex-shrink:0}
.modal .mi b{font-size:.9rem;display:block}
.modal .mi small{color:var(--ink-3);font-size:.76rem;display:block;min-width:0}
.modal .mi .tag{margin-left:auto;flex-shrink:0}
@media(max-width:480px){.modal-mask{padding:0;align-items:flex-end}.modal{max-width:none;border-radius:20px 20px 0 0;max-height:92vh;padding-bottom:env(safe-area-inset-bottom)}}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(26px)}
.reveal.in{opacity:1;transform:none;transition:opacity .7s ease,transform .7s cubic-bezier(.22,1,.3,1)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
@keyframes spin{to{transform:rotate(360deg)}}
.spinner{width:18px;height:18px;border:2.5px solid rgba(255,255,255,.35);border-top-color:#fff;
  border-radius:50%;animation:spin .7s linear infinite;display:inline-block}
.spinner.dark{border-color:rgba(61,90,254,.25);border-top-color:var(--primary)}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
.caret{display:inline-block;width:2px;height:1em;background:var(--primary);vertical-align:-.15em;
  margin-left:2px;animation:blink 1s infinite}

/* ---------- 页脚 ---------- */
.footer{background:#0F1230;color:#A9AEC9;padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
@media(max-width:860px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px 20px;padding-bottom:34px}
  .footer-grid > div:first-child{grid-column:1/-1}
  .footer h4{font-size:.92rem;margin-bottom:13px;display:flex;align-items:center;gap:8px}
  .footer h4::before{content:'';width:3px;height:14px;border-radius:2px;background:linear-gradient(180deg,var(--primary),var(--primary-2));flex-shrink:0}
  .footer a{font-size:.84rem;margin-bottom:10px}
  .footer .slogan{max-width:none}
  .footer-bar{justify-content:center;text-align:center;padding:16px 0}
}
.footer h4{color:#fff;font-size:.95rem;margin-bottom:16px;font-weight:700}
.footer a{display:block;font-size:.86rem;margin-bottom:11px;color:#A9AEC9;transition:.2s}
.footer a:hover{color:#fff}
.footer .brand{color:#fff;margin-bottom:14px}
.footer .slogan{font-size:.86rem;line-height:1.8;max-width:300px}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{width:36px;height:36px;border-radius:10px;background:rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:center;margin:0}
.footer-social a:hover{background:var(--primary)}
.footer-social svg{width:17px;height:17px}
.footer-bar{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;font-size:.78rem;
  color:#6A6F8F;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.footer-bar a{display:inline;margin:0}

/* ---------- 工具类 ---------- */
.row{display:flex;align-items:center;gap:10px}
.between{display:flex;align-items:center;justify-content:space-between;gap:10px}
.wrap{flex-wrap:wrap}
.muted{color:var(--ink-3);font-size:.85rem}
.mono{font-family:var(--mono)}
.ellipsis{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hide{display:none!important}
.divider{height:1px;background:var(--line);margin:18px 0}
.badge-num{min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:var(--err);
  color:#fff;font-size:.7rem;font-weight:700;display:inline-flex;align-items:center;justify-content:center}