/* 中转站竞技场 — 复刻 aiapipk.com 视觉（Tailwind 风格设计令牌） */
:root {
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --red-50: #fef2f2;
  --red-100: #fee2e2;
  --red-500: #ef4444;
  --yellow-50: #fffbeb;
  --yellow-100: #fef9c3;
  --yellow-500: #eab308;
  --orange-50: #fff7ed;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, .1), 0 1px 2px -1px rgba(0, 0, 0, .1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--gray-800);
  background: linear-gradient(to bottom, var(--gray-50), #fff);
  min-height: 100vh;
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.container { max-width: 80rem; margin: 0 auto; padding: 0 1rem; }
.narrow { max-width: 48rem; }

/* ---------- 顶栏 ---------- */
.navbar {
  position: sticky; top: 0; z-index: 30;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--gray-200);
}
.navbar-inner { display: flex; align-items: center; justify-content: space-between; height: 4rem; }
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 800; font-size: 1.15rem; color: var(--gray-900); }
.brand img { width: 2rem; height: 2rem; border-radius: .5rem; }
.brand .dot { width: 2rem; height: 2rem; border-radius: .5rem; background: var(--blue-600); color: #fff; display: grid; place-items: center; font-weight: 800; }
.nav-links { display: flex; align-items: center; gap: .25rem; }
.nav-links a {
  padding: .5rem .85rem; border-radius: .5rem; font-size: .92rem; font-weight: 500; color: var(--gray-600);
  transition: all .15s;
}
.nav-links a:hover { color: var(--blue-600); background: var(--blue-50); }
.nav-links a.active { color: var(--blue-700); background: var(--blue-50); }
.nav-toggle { display: none; background: none; border: 0; font-size: 1.5rem; cursor: pointer; color: var(--gray-700); }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 3.5rem 0 2rem; }
.hero h1 { font-size: 2.5rem; font-weight: 800; color: var(--gray-900); margin: 0 0 .75rem; letter-spacing: -.02em; }
.hero p { font-size: 1.05rem; color: var(--gray-500); max-width: 42rem; margin: 0 auto; }
.hero .stat-pills { display: flex; gap: 1rem; justify-content: center; margin-top: 1.5rem; flex-wrap: wrap; }
.stat-pill { background: #fff; border: 1px solid var(--gray-200); border-radius: .75rem; padding: .6rem 1.1rem; box-shadow: var(--shadow-sm); }
.stat-pill b { display: block; font-size: 1.4rem; color: var(--blue-600); font-weight: 800; }
.stat-pill span { font-size: .8rem; color: var(--gray-500); }

/* ---------- 工具条 ---------- */
.toolbar { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; justify-content: space-between; margin: 1.5rem 0 1rem; }
.search-box { position: relative; flex: 1; min-width: 12rem; max-width: 22rem; }
.search-box input { width: 100%; padding: .55rem .9rem .55rem 2.2rem; border: 1px solid var(--gray-300); border-radius: .6rem; font-size: .92rem; background: #fff; }
.search-box input:focus { outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 3px var(--blue-100); }
.search-box .ico { position: absolute; left: .7rem; top: 50%; transform: translateY(-50%); color: var(--gray-400); }
.seg { display: inline-flex; background: var(--gray-100); border-radius: .6rem; padding: .2rem; }
.seg button { border: 0; background: none; padding: .4rem .8rem; border-radius: .45rem; font-size: .85rem; color: var(--gray-600); cursor: pointer; font-weight: 500; }
.seg button.active { background: #fff; color: var(--blue-700); box-shadow: var(--shadow-sm); }

/* ---------- 渠道排行卡片 ---------- */
.arena-list { display: flex; flex-direction: column; gap: .9rem; }
.channel-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: .85rem;
  box-shadow: var(--shadow-sm); overflow: hidden; transition: box-shadow .2s, transform .2s;
}
.channel-card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.cc-head { display: flex; align-items: center; gap: 1rem; padding: 1rem 1.25rem; cursor: pointer; }
.rank-badge {
  flex-shrink: 0; width: 2.6rem; height: 2.6rem; border-radius: .7rem; display: grid; place-items: center;
  font-weight: 800; font-size: 1.1rem; background: var(--gray-100); color: var(--gray-500);
}
.rank-1 { background: linear-gradient(135deg, #fbbf24, #f59e0b); color: #fff; }
.rank-2 { background: linear-gradient(135deg, #cbd5e1, #94a3b8); color: #fff; }
.rank-3 { background: linear-gradient(135deg, #f0a868, #c2773f); color: #fff; }
.cc-main { flex: 1; min-width: 0; }
.cc-name { font-weight: 700; font-size: 1.05rem; color: var(--gray-900); display: flex; align-items: center; gap: .5rem; }
.cc-models-line { margin-top: .25rem; display: flex; flex-wrap: wrap; gap: .35rem; }
.type-pill { font-size: .72rem; font-weight: 600; padding: .12rem .5rem; border-radius: 999px; text-transform: uppercase; }
.t-openai { background: var(--green-100); color: var(--green-600); }
.t-claude { background: #f3e8ff; color: #9333ea; }
.t-gemini { background: var(--blue-100); color: var(--blue-700); }
.t-deepseek { background: var(--yellow-100); color: #a16207; }
.t-reverse { background: var(--orange-50); color: #c2410c; }
.cc-metrics { display: flex; align-items: center; gap: 1.5rem; flex-shrink: 0; }
.metric { text-align: center; }
.metric .v { font-weight: 800; font-size: 1.1rem; color: var(--gray-900); }
.metric .l { font-size: .72rem; color: var(--gray-400); }
.score-big { color: var(--blue-600); }
.success-good { color: var(--green-600); }
.success-mid { color: var(--yellow-500); }
.success-bad { color: var(--red-500); }
.chevron { color: var(--gray-400); transition: transform .2s; }
.channel-card.open .chevron { transform: rotate(180deg); }

/* 展开详情 */
.cc-body { max-height: 0; overflow: hidden; transition: max-height .3s ease; border-top: 0 solid var(--gray-100); }
.channel-card.open .cc-body { max-height: 1500px; border-top: 1px solid var(--gray-100); }
.cc-body-inner { padding: 1rem 1.25rem; }
.model-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.model-table th { text-align: left; color: var(--gray-400); font-weight: 600; font-size: .75rem; padding: .35rem .5rem; text-transform: uppercase; }
.model-table td { padding: .5rem; border-top: 1px solid var(--gray-100); vertical-align: top; }
.price-tag { font-weight: 700; color: var(--gray-900); }
.group-tag { font-size: .72rem; background: var(--gray-100); color: var(--gray-600); padding: .1rem .45rem; border-radius: .35rem; }
.visit-btn {
  display: inline-flex; align-items: center; gap: .35rem; margin-top: .9rem;
  background: var(--blue-600); color: #fff; padding: .45rem .9rem; border-radius: .55rem;
  font-size: .85rem; font-weight: 600;
}
.visit-btn:hover { background: var(--blue-700); }
.no-data { color: var(--gray-400); font-size: .82rem; }

/* ---------- 卡片网格（channels 页） ---------- */
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr)); }
.dir-card { background: #fff; border: 1px solid var(--gray-200); border-radius: .85rem; padding: 1.1rem; box-shadow: var(--shadow-sm); transition: box-shadow .2s, transform .2s; }
.dir-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.dir-card h3 { margin: 0 0 .5rem; font-size: 1.05rem; color: var(--gray-900); }

/* ---------- 卡片/表单通用 ---------- */
.card { background: #fff; border: 1px solid var(--gray-200); border-radius: .85rem; box-shadow: var(--shadow-sm); padding: 1.5rem; }
.section-title { font-size: 1.5rem; font-weight: 800; color: var(--gray-900); margin: 0 0 .35rem; }
.section-sub { color: var(--gray-500); margin: 0 0 1.5rem; }
label.fld { display: block; margin-bottom: 1rem; }
label.fld > span { display: block; font-size: .85rem; font-weight: 600; color: var(--gray-700); margin-bottom: .35rem; }
label.fld .hint { font-weight: 400; color: var(--gray-400); font-size: .78rem; }
input.inp, textarea.inp, select.inp {
  width: 100%; padding: .6rem .8rem; border: 1px solid var(--gray-300); border-radius: .55rem; font-size: .92rem; background: #fff; font-family: inherit;
}
input.inp:focus, textarea.inp:focus, select.inp:focus { outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 3px var(--blue-100); }
textarea.inp { min-height: 5rem; resize: vertical; }
.btn { display: inline-flex; align-items: center; gap: .4rem; padding: .6rem 1.1rem; border-radius: .55rem; font-size: .9rem; font-weight: 600; border: 0; cursor: pointer; transition: all .15s; }
.btn-primary { background: var(--blue-600); color: #fff; }
.btn-primary:hover { background: var(--blue-700); }
.btn-ghost { background: var(--gray-100); color: var(--gray-700); }
.btn-ghost:hover { background: var(--gray-200); }
.btn-danger { background: var(--red-500); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-sm { padding: .35rem .7rem; font-size: .8rem; }

/* ---------- 提示 ---------- */
.toast { position: fixed; top: 1.2rem; left: 50%; transform: translateX(-50%); z-index: 100; padding: .7rem 1.2rem; border-radius: .6rem; box-shadow: var(--shadow-lg); font-size: .9rem; font-weight: 500; opacity: 0; transition: opacity .25s, transform .25s; pointer-events: none; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { background: var(--green-600); color: #fff; }
.toast.error { background: var(--red-500); color: #fff; }
.alert { padding: .7rem 1rem; border-radius: .55rem; font-size: .88rem; margin-bottom: 1rem; }
.alert-info { background: var(--blue-50); color: var(--blue-700); border: 1px solid var(--blue-200); }
.alert-warn { background: var(--yellow-50); color: #a16207; border: 1px solid var(--yellow-100); }

/* ---------- 页脚 ---------- */
.footer { margin-top: 4rem; border-top: 1px solid var(--gray-200); padding: 2rem 0; text-align: center; color: var(--gray-400); font-size: .85rem; }
.footer a { color: var(--gray-500); }
.footer a:hover { color: var(--blue-600); }

/* ---------- 关于页 ---------- */
.prose h2 { font-size: 1.25rem; color: var(--gray-900); margin: 1.75rem 0 .5rem; }
.prose p { color: var(--gray-600); margin: .5rem 0; }
.prose ol, .prose ul { color: var(--gray-600); padding-left: 1.25rem; }
.prose li { margin: .35rem 0; }
.formula { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: .6rem; padding: 1rem; font-family: ui-monospace, monospace; font-size: .85rem; color: var(--gray-700); overflow-x: auto; }

/* ---------- 后台 ---------- */
.admin-shell { display: flex; min-height: 100vh; }
.admin-side { width: 15rem; background: var(--gray-900); color: var(--gray-300); flex-shrink: 0; padding: 1.25rem 0; }
.admin-side .logo { padding: 0 1.25rem 1.25rem; font-weight: 800; color: #fff; font-size: 1.1rem; border-bottom: 1px solid var(--gray-800); margin-bottom: .75rem; }
.admin-side a { display: flex; align-items: center; gap: .6rem; padding: .65rem 1.25rem; font-size: .9rem; color: var(--gray-400); }
.admin-side a:hover { background: var(--gray-800); color: #fff; }
.admin-side a.active { background: var(--blue-600); color: #fff; }
.admin-side .sep { font-size: .7rem; text-transform: uppercase; color: var(--gray-600); padding: 1rem 1.25rem .35rem; letter-spacing: .05em; }
.admin-main { flex: 1; background: var(--gray-50); padding: 1.75rem 2rem; overflow-x: hidden; }
.admin-topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.admin-topbar h1 { font-size: 1.4rem; font-weight: 800; color: var(--gray-900); margin: 0; }

.kpi-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.kpi { background: #fff; border: 1px solid var(--gray-200); border-radius: .75rem; padding: 1.1rem; box-shadow: var(--shadow-sm); }
.kpi .n { font-size: 1.8rem; font-weight: 800; color: var(--gray-900); }
.kpi .t { color: var(--gray-500); font-size: .85rem; margin-top: .2rem; }

.adm-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: .6rem; overflow: hidden; }
.adm-table th { background: var(--gray-50); text-align: left; padding: .7rem .9rem; font-size: .78rem; color: var(--gray-500); text-transform: uppercase; font-weight: 600; }
.adm-table td { padding: .7rem .9rem; border-top: 1px solid var(--gray-100); font-size: .9rem; }
.badge { font-size: .72rem; padding: .15rem .5rem; border-radius: 999px; font-weight: 600; }
.badge-pending { background: var(--yellow-100); color: #a16207; }
.badge-approved { background: var(--green-100); color: var(--green-600); }
.badge-rejected { background: var(--red-100); color: var(--red-500); }

.login-wrap { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(to bottom, var(--gray-50), #fff); padding: 1rem; }
.login-card { width: 100%; max-width: 24rem; background: #fff; border: 1px solid var(--gray-200); border-radius: 1rem; box-shadow: var(--shadow-lg); padding: 2rem; }
.login-card h1 { text-align: center; font-size: 1.4rem; margin: 0 0 .35rem; color: var(--gray-900); }
.login-card .sub { text-align: center; color: var(--gray-500); font-size: .88rem; margin-bottom: 1.5rem; }

.spinner { width: 1rem; height: 1rem; border: 2px solid rgba(255,255,255,.4); border-top-color: #fff; border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 模型编辑行 */
.model-row { display: grid; grid-template-columns: 7rem 1fr 6rem 2fr auto; gap: .5rem; margin-bottom: .5rem; align-items: start; }
.model-row .inp { padding: .4rem .55rem; font-size: .85rem; }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .nav-links { position: absolute; top: 4rem; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch; padding: .5rem; border-bottom: 1px solid var(--gray-200); box-shadow: var(--shadow-md); display: none; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 1.9rem; }
  .cc-metrics { gap: .9rem; }
  .cc-metrics .metric:nth-child(2) { display: none; }
  .admin-side { position: fixed; left: 0; top: 0; bottom: 0; z-index: 40; transform: translateX(-100%); transition: transform .25s; }
  .admin-side.open { transform: translateX(0); }
  .admin-main { padding: 1rem; }
  .model-row { grid-template-columns: 1fr 1fr; }
}