:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e5e9f2;
  --brand: #2457f5;
  --brand-dark: #1741c9;
  --brand-soft: #eef3ff;
  --ok: #0f9d6e;
  --ok-soft: #e8f8f2;
  --warn: #d97706;
  --warn-soft: #fff6e6;
  --danger: #dc2626;
  --danger-soft: #fdecec;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px rgba(16, 24, 40, 0.06);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

/* 通用组件 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid transparent; border-radius: 10px; padding: 8px 14px;
  background: var(--brand); color: #fff; font-weight: 600; font-size: 13px;
  transition: background .15s, box-shadow .15s, border-color .15s; white-space: nowrap;
}
.btn:hover { background: var(--brand-dark); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.ghost { background: #fff; border-color: var(--line); color: var(--ink); }
.btn.ghost:hover { border-color: #c9d3e6; background: #fbfcff; }
.btn.soft { background: var(--brand-soft); color: var(--brand-dark); }
.btn.soft:hover { background: #e2eaff; }
.btn.danger { background: var(--danger); }
.btn.danger:hover { background: #b91c1c; }
.btn.sm { padding: 5px 10px; font-size: 12px; border-radius: 8px; }
.btn.link { background: none; color: var(--brand); padding: 2px 4px; font-weight: 500; }
.btn.link:hover { background: none; text-decoration: underline; }

.input, .select, .textarea {
  width: 100%; border: 1px solid var(--line); background: #fff; border-radius: 10px;
  padding: 9px 12px; outline: none; transition: border-color .15s, box-shadow .15s; font-size: 13px;
}
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--brand); box-shadow: 0 0 0 3px rgba(36, 87, 245, .12);
}
.textarea { min-height: 84px; resize: vertical; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 12px; font-weight: 600; color: #334155; }
.field .hint { font-size: 11px; color: var(--muted); }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 140px; }

.badge {
  display: inline-flex; align-items: center; gap: 5px; padding: 2px 9px;
  border-radius: 999px; font-size: 11px; font-weight: 600; background: #eef2f9; color: #475569;
}
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.brand { background: var(--brand-soft); color: var(--brand-dark); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card-pad { padding: 18px 20px; }
.section-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.section-title h3 { font-size: 15px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); font-size: 13px; }
th { font-size: 11px; font-weight: 650; color: var(--muted); background: #fafcff; letter-spacing: .02em; }
tbody tr:hover { background: #fbfcff; }
tbody tr:last-child td { border-bottom: none; }
.group-row td { background: #f6f9ff; font-weight: 650; color: #1e293b; }
.group-row .grp-meta { font-weight: 400; color: var(--muted); font-size: 12px; }

/* 弹层 */
.modal-mask {
  position: fixed; inset: 0; background: rgba(15, 23, 42, .45); display: flex;
  align-items: center; justify-content: center; padding: 24px; z-index: 50;
}
.modal {
  background: #fff; border-radius: 16px; width: min(560px, 100%); max-height: 88vh;
  overflow: auto; box-shadow: 0 24px 60px rgba(15, 23, 42, .24);
}
.modal-head { padding: 18px 22px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; }
.modal-body { padding: 20px 22px; }
.modal-foot { padding: 14px 22px; border-top: 1px solid var(--line); display: flex; justify-content: flex-end; gap: 10px; }

/* Toast */
#toasts { position: fixed; right: 18px; bottom: 18px; display: flex; flex-direction: column; gap: 8px; z-index: 80; }
.toast {
  background: #0f172a; color: #fff; padding: 10px 14px; border-radius: 10px; font-size: 13px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, .25); max-width: 340px; animation: slidein .2s ease;
}
.toast.ok { background: #0b7a56; }
.toast.warn { background: #b45309; }
.toast.err { background: #b91c1c; }
@keyframes slidein { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* 登录 */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; }
.auth-card { width: min(400px, 100%); padding: 30px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, #2457f5, #4f7bff); color: #fff; font-weight: 800; font-size: 18px;
  box-shadow: 0 8px 18px rgba(36, 87, 245, .28);
}

/* 顶栏 */
.topbar {
  position: sticky; top: 0; z-index: 30; background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
}
.topbar-inner { max-width: 1240px; margin: 0 auto; padding: 0 24px; height: 60px; display: flex; align-items: center; gap: 14px; }
.topbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.topbar .spacer { flex: 1; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px;
  background: #f1f5fb; font-size: 12px; color: #475569; border: 1px solid var(--line);
}

.tabs { max-width: 1240px; margin: 0 auto; padding: 16px 24px 0; display: flex; gap: 6px; overflow-x: auto; }
.tab {
  padding: 8px 14px; border-radius: 10px; border: 1px solid transparent; background: transparent;
  font-weight: 600; font-size: 13px; color: var(--muted); white-space: nowrap;
}
.tab.active { background: #fff; border-color: var(--line); color: var(--ink); box-shadow: var(--shadow); }

.page { max-width: 1240px; margin: 0 auto; padding: 18px 24px 80px; }
.stack { display: flex; flex-direction: column; gap: 16px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.stat { padding: 14px 16px; }
.stat .k { font-size: 11px; color: var(--muted); font-weight: 600; }
.stat .v { font-size: 22px; font-weight: 750; margin-top: 2px; letter-spacing: -0.02em; }

.toolbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.seg { display: inline-flex; background: #eef2f9; border-radius: 10px; padding: 3px; }
.seg button { border: none; background: transparent; padding: 6px 12px; border-radius: 8px; font-size: 12px; font-weight: 600; color: var(--muted); }
.seg button.active { background: #fff; color: var(--ink); box-shadow: 0 1px 3px rgba(15,23,42,.12); }

.empty { padding: 36px 20px; text-align: center; color: var(--muted); font-size: 13px; }

.win-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.win-card { padding: 16px 18px; display: flex; flex-direction: column; gap: 10px; }
.win-card .head { display: flex; justify-content: space-between; gap: 10px; align-items: flex-start; }
.win-card h4 { font-size: 14px; }
.rule-tags { display: flex; flex-wrap: wrap; gap: 5px; }
.tag { font-size: 11px; padding: 2px 8px; border-radius: 6px; background: #f2f5fa; color: #475569; }
.win-req { font-size: 12px; color: var(--muted); background: #fafcff; border-left: 3px solid var(--brand-soft); padding: 6px 10px; border-radius: 0 6px 6px 0; white-space: pre-wrap; }
.card-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; padding-top: 4px; }

/* 提交者端 */
.submit-wrap { max-width: 900px; margin: 0 auto; padding: 24px 20px 120px; }
.hero { padding: 26px 26px; background: linear-gradient(135deg, #ffffff, #f2f6ff); }
.hero h1 { font-size: 22px; }
.hero p { color: var(--muted); font-size: 13px; margin-top: 4px; }
.win-block { padding: 18px 20px; }
.win-block .head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.progress-line { height: 6px; border-radius: 999px; background: #edf1f8; overflow: hidden; }
.progress-line > i { display: block; height: 100%; background: linear-gradient(90deg, #2457f5, #5b84ff); border-radius: 999px; transition: width .3s; }
.progress-line.ok > i { background: linear-gradient(90deg, #0f9d6e, #34d399); }

.file-list { display: flex; flex-direction: column; gap: 6px; margin-top: 12px; }
.file-item {
  display: flex; align-items: center; gap: 10px; padding: 8px 10px; border: 1px solid var(--line);
  border-radius: 10px; background: #fff;
}
.file-item .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.file-item .meta { font-size: 11px; color: var(--muted); }

.dropzone {
  margin-top: 12px; border: 1.5px dashed #c8d4ea; border-radius: 12px; padding: 18px; text-align: center;
  color: var(--muted); font-size: 13px; background: #fafcff; transition: .15s; cursor: pointer;
}
.dropzone:hover, .dropzone.drag { border-color: var(--brand); background: var(--brand-soft); color: var(--brand-dark); }

.upload-row { margin-top: 10px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.upload-row .top { display: flex; justify-content: space-between; gap: 10px; font-size: 12px; margin-bottom: 6px; }

.submit-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; background: rgba(255,255,255,.94);
  backdrop-filter: blur(10px); border-top: 1px solid var(--line);
}
.submit-bar-inner {
  max-width: 900px; margin: 0 auto; padding: 12px 20px; display: flex; align-items: center;
  gap: 14px; justify-content: space-between;
}
.blockers { font-size: 12px; color: var(--warn); }
.submit-success { padding: 22px; border-radius: 14px; background: var(--ok-soft); border: 1px solid #b7ecd9; }
.submit-success h3 { color: var(--ok); }

.landing { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.landing-inner { width: min(880px, 100%); }
.landing h1 { font-size: 30px; margin-bottom: 8px; }
.landing .lead { color: var(--muted); margin-bottom: 26px; }
.entry-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.entry { padding: 24px; display: flex; flex-direction: column; gap: 10px; }
.entry h3 { font-size: 17px; }
.entry p { color: var(--muted); font-size: 13px; flex: 1; }
.feat { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 8px; }

@media (max-width: 720px) {
  .topbar-inner, .page, .tabs { padding-left: 14px; padding-right: 14px; }
  .submit-wrap { padding: 16px 14px 130px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  th, td { padding: 8px 8px; }
  .hide-sm { display: none; }
}