:root {
  color-scheme: light;
  --ink: #243447;
  --ink-soft: #596b7d;
  --ink-faint: #7c8c9d;
  --paper: #fffefa;
  --canvas: #f8f9f5;
  --blue-50: #edf6ff;
  --blue-100: #d8ebff;
  --blue-600: #2674b9;
  --blue-700: #18568e;
  --pink-50: #fff0f5;
  --pink-100: #ffdce8;
  --pink-700: #b33c68;
  --yellow-50: #fff9df;
  --yellow-100: #ffefad;
  --yellow-700: #946c00;
  --line: #d7e3ee;
  --line-strong: #b7cde1;
  --shadow-sm: 0 2px 8px rgb(32 50 46 / 7%);
  --shadow-md: 0 12px 32px rgb(32 50 46 / 9%);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --focus: #946c00;
  font-family: "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--canvas);
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--canvas); }
body { min-height: 100vh; margin: 0; overflow-x: clip; background: radial-gradient(circle at 8% 0%, var(--blue-50), transparent 32rem), var(--canvas); }
main { width: min(1180px, 100%); margin: 0 auto; padding: clamp(28px, 5vw, 68px) clamp(16px, 4vw, 44px) 72px; }
main.narrow { width: min(680px, 100%); }
.site-header { position: sticky; top: 0; z-index: 20; max-width: none; margin: 0; background: rgb(255 254 250 / 88%); border-bottom: 1px solid rgb(183 205 225 / 72%); box-shadow: 0 8px 24px rgb(32 50 46 / 5%); backdrop-filter: blur(16px); }
.site-header__inner { position: relative; display: flex; align-items: center; flex-wrap: nowrap; gap: 16px 28px; width: min(1180px, 100%); min-height: 104px; margin: 0 auto; padding: 10px clamp(16px, 4vw, 44px); }
.site-brand { display: inline-flex; align-items: center; gap: 11px; min-width: 0; color: var(--ink); text-decoration: none; }
.site-brand:hover { color: var(--ink); }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.site-brand__copy { display: flex; align-items: center; gap: 16px; min-width: 0; line-height: 1.15; }
.site-brand__logo { display: block; flex: 0 0 auto; width: 230px; height: auto; object-fit: contain; }
.site-brand__fallback { display: inline-flex; align-items: center; flex: 0 0 auto; width: 230px; color: #20252b; font-size: 1.15rem; font-weight: 800; letter-spacing: .08em; white-space: nowrap; }
.site-brand__copy small { padding: 7px 0 7px 16px; border-left: 1px solid var(--line-strong); color: var(--ink-soft); font-size: .69rem; font-weight: 650; letter-spacing: .08em; white-space: nowrap; }
.site-brand__copy small span { white-space: nowrap; }
.site-header--login .site-header__inner { justify-content: center; }
.site-nav { display: flex; align-items: center; gap: 5px; min-width: 0; }
.site-nav a { padding: 8px 13px; color: var(--ink-soft); border: 1px solid transparent; border-radius: 999px; font-size: .9rem; font-weight: 800; text-decoration: none; transition: color .16s ease, background-color .16s ease, border-color .16s ease; }
.site-nav a:hover { color: var(--blue-700); background: var(--blue-50); border-color: var(--blue-100); }
.site-nav a.is-active { color: var(--blue-700); background: var(--blue-50); border-color: #c2d9ee; box-shadow: inset 0 0 0 1px rgb(255 255 255 / 64%); }
.site-session { display: inline-flex; align-items: center; justify-content: flex-end; gap: 8px; min-width: 92px; margin-left: auto; color: var(--ink-faint); font-size: .8rem; font-weight: 700; text-align: right; }
.site-session a { color: var(--blue-700); text-decoration: none; }
.site-session button { min-height: 34px; padding: 7px 11px; font-size: .8rem; }
.site-menu-panel { display: flex; flex: 1 1 auto; align-items: center; gap: 28px; min-width: 0; }
.site-menu-panel[hidden] { display: none; }
.site-menu-toggle { display: none; flex: 0 0 44px; width: 44px; height: 44px; min-height: 44px; margin-left: auto; padding: 10px; color: var(--blue-700); background: #fff; border: 1px solid var(--line-strong); border-radius: 12px; box-shadow: none; }
.site-menu-toggle:hover { color: var(--blue-700); background: var(--blue-50); border-color: var(--blue-600); transform: none; box-shadow: none; }
.site-menu-toggle__icon { display: grid; gap: 4px; width: 20px; }
.site-menu-toggle__icon > span { display: block; height: 2px; border-radius: 2px; background: currentColor; }
.site-footer { border-top: 1px solid var(--line); background: rgb(255 254 250 / 84%); }
.site-footer__inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 18px 28px; width: min(1180px, 100%); margin: 0 auto; padding: 24px clamp(16px, 4vw, 44px) 28px; }
.site-footer__logo-link { display: inline-flex; flex: 0 0 auto; }
.site-footer__logo { display: block; width: 190px; height: auto; object-fit: contain; }
.site-footer__fallback { display: inline-flex; align-items: center; width: 190px; color: #20252b; font-size: .9rem; font-weight: 800; letter-spacing: .06em; white-space: nowrap; }
.site-footer__copy { display: grid; gap: 6px; min-width: 0; }
.site-footer p { margin: 0; }
.site-footer__brand { color: var(--ink-soft); font-size: .86rem; font-weight: 800; }
.site-footer__meta { color: var(--ink-faint); font-size: .78rem; }
.site-header + main { padding-top: clamp(28px, 4vw, 54px); }
header { max-width: 800px; margin: 28px 0 34px; }
h1 { margin: .12em 0 .2em; color: var(--ink); font-size: clamp(2.25rem, 6vw, 4.7rem); line-height: 1.04; letter-spacing: -.055em; }
h2 { margin: 0 0 12px; font-size: clamp(1.3rem, 2.2vw, 1.75rem); line-height: 1.2; }
h3 { margin: 0; font-size: 1.05rem; line-height: 1.35; }
p { margin: .65em 0; }
a { color: var(--blue-700); text-underline-offset: 3px; }
a:hover { color: #143f63; }

.top-nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 38px; }
.top-nav > :first-child { font-weight: 800; }
.top-nav__actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 9px; }
.eyebrow { margin: 0 0 8px; color: var(--blue-700); font-size: .82rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.back { color: var(--blue-700); font-weight: 700; text-decoration: none; }
.muted { color: var(--ink-soft); font-size: .92rem; }
.error { color: var(--pink-700); font-weight: 700; }

.grid, .builder-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.grid article, .panel { min-width: 0; padding: clamp(18px, 3vw, 28px); background: rgb(255 254 250 / 96%); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.grid article { overflow-wrap: anywhere; }
.grid article { min-height: 220px; }
.grid article:nth-child(2) { background: #fff; border-color: #f0d98d; }
.grid article:nth-child(3) { background: #fff; border-color: var(--pink-100); }
.panel { margin-top: 20px; }
.panel.compact { min-height: 0; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.panel-head h2 { margin: 0; }
.notice { display: flex; gap: 14px; margin: 28px 0; padding: 16px 18px; background: var(--blue-100); border: 1px solid #b6d5f2; border-left: 5px solid var(--blue-600); border-radius: var(--radius-md); }

button, .button-link { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 10px 16px; color: #fff; background: var(--blue-600); border: 1px solid var(--blue-600); border-radius: var(--radius-sm); box-shadow: 0 2px 0 rgb(38 116 185 / 18%); font: inherit; font-weight: 800; line-height: 1.2; text-decoration: none; cursor: pointer; transition: background-color .16s ease, border-color .16s ease, transform .16s ease, box-shadow .16s ease; }
button:hover, .button-link:hover { background: var(--blue-700); border-color: var(--blue-700); color: #fff; transform: translateY(-1px); box-shadow: 0 5px 12px rgb(38 116 185 / 22%); }
button:active, .button-link:active { transform: translateY(0); }
button:disabled { color: #64736e; background: #d9e1dd; border-color: #d9e1dd; box-shadow: none; cursor: not-allowed; transform: none; }
.secondary { color: var(--blue-700); background: var(--blue-50); border-color: #b7cee6; box-shadow: none; }
.secondary:hover { color: #143f63; background: var(--blue-100); border-color: #8fb7d8; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 16px; }
.actions > a { min-height: 42px; }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: end; }
.form-grid label, label:has(> select) { display: grid; gap: 7px; min-width: 0; color: var(--ink); font-weight: 750; }
.form-grid .wide { grid-column: 1 / -1; }
input, select, textarea { width: 100%; min-width: 0; padding: 11px 13px; color: var(--ink); background: #fff; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); font: inherit; font-size: 16px; line-height: 1.4; }
input::placeholder, textarea::placeholder { color: #8091a3; }
input:hover, select:hover, textarea:hover { border-color: #86acd0; }
input:disabled, select:disabled, textarea:disabled { color: #6e7a86; background: #edf2f7; cursor: not-allowed; }
textarea { min-height: 180px; resize: vertical; line-height: 1.7; }
.form-grid input[type="number"] { font-variant-numeric: tabular-nums; }
.check, .form-grid label.check { display: flex; align-items: center; gap: 9px; font-weight: 700; }
.check input, input[type="checkbox"], input[type="radio"] { width: 18px; height: 18px; accent-color: var(--blue-600); }
fieldset { min-width: 0; padding: 16px; border: 1px solid var(--line-strong); border-radius: var(--radius-md); background: var(--blue-50); }
legend { padding: 0 6px; color: var(--ink); font-weight: 800; }
.check-list { display: grid; gap: 10px; }
.section-selects { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.section-select { display: grid; gap: 7px; color: var(--ink); font-weight: 750; }
.batch-defaults { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; align-items: end; }
.batch-sections { margin-top: 18px; }
.batch-label { margin: 0 0 8px; font-weight: 800; }
.batch-preview { margin-top: 4px; padding: 18px; background: var(--yellow-50); border: 1px solid #f0d98d; border-radius: var(--radius-md); }
.batch-rows { display: grid; gap: 14px; margin-top: 14px; }
.batch-row { padding: 15px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md); }
.batch-row-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.batch-row label { display: grid; gap: 6px; margin-top: 10px; font-weight: 700; }
.batch-row textarea { min-height: 72px; }
.batch-remove { min-height: 32px; padding: 5px 8px; color: var(--pink-700); }
.batch-results { margin-top: 18px; padding: 16px 18px; background: var(--blue-50); border: 1px solid #c8ddf2; border-radius: var(--radius-md); }
.batch-results h2 { margin-bottom: 7px; font-size: 1.15rem; }
.batch-results ul { margin: 8px 0 0; padding-left: 1.35em; }

.builder-meta { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 26px 0; }
.builder-meta label { display: grid; gap: 6px; font-weight: 700; }
.paper-category { min-width: 0; margin: 14px 0; padding: 17px; background: var(--yellow-50); border: 1px solid #f0d98d; border-radius: var(--radius-md); }
.paper-category input { width: 100%; }
.paper-category .question-stem { margin-top: 10px; }
.section-row { display: flex; gap: 8px; margin-top: 10px; }
.section-row button, .text-button { min-height: 34px; padding: 6px 10px; color: var(--blue-700); background: transparent; border-color: transparent; box-shadow: none; }
.year-controls { display: flex; align-items: center; gap: 8px; }
.year-controls select { flex: 1; }
.year-step { min-width: 38px; min-height: 38px; padding: 6px 10px; color: var(--blue-700); background: var(--paper); border: 1px solid #9bc0df; box-shadow: none; }
.section-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 11px; }
.section-tags span { padding: 4px 10px; color: var(--pink-700); background: var(--pink-100); border-radius: 999px; font-size: .8rem; font-weight: 800; }
.small-title { margin: 0; font-size: 1.12rem; }
.question-stem { margin: .4em 0; overflow-wrap: anywhere; white-space: pre-wrap; line-height: 1.75; }
.question-card { min-height: 0; }
.question-card .eyebrow { margin: 0 0 .45em; font-size: .82rem; }
.question-list { min-width: 0; }
.selected-question { padding: 17px 0; border-top: 1px solid var(--line); }
.answer-content { padding: 13px; color: var(--ink); background: var(--blue-50); border: 1px solid #c8ddf2; border-radius: var(--radius-sm); white-space: pre-wrap; line-height: 1.75; }
.answer-details summary { padding: 9px 0; color: var(--blue-700); font-weight: 750; cursor: pointer; }

.filters { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.question-filter { grid-template-columns: minmax(240px, 2fr) repeat(2, minmax(150px, 1fr)) auto; align-items: end; }
.question-filter button { white-space: nowrap; }
.paper-filter { grid-template-columns: repeat(4, minmax(0, 1fr)) auto; align-items: end; margin: 14px 0 20px; }
.paper-filter .clear-filter { color: var(--blue-700); background: var(--paper); border-color: #9bc0df; white-space: nowrap; }
.paper-create-form { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.paper-create-form > button { grid-column: 1 / -1; justify-self: end; }
.pagination { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.empty { margin: 26px 0; padding: 20px 8px; color: var(--ink-soft); text-align: center; line-height: 1.7; }
pre { max-height: 160px; padding: 12px; overflow: auto; background: #f4f7fb; border: 1px solid var(--line); border-radius: var(--radius-sm); font-size: .78rem; white-space: pre-wrap; }

.sticky-actions { position: sticky; bottom: 14px; z-index: 1; padding: 14px; background: rgb(255 254 250 / 94%); border: 1px solid var(--line); border-radius: var(--radius-md); backdrop-filter: blur(10px); }
.modal { width: min(860px, calc(100% - 28px)); max-height: min(86vh, 900px); padding: clamp(18px, 3vw, 28px); overflow: auto; background: var(--paper); border: 1px solid var(--line-strong); border-radius: var(--radius-lg); box-shadow: 0 24px 80px rgb(32 50 46 / 25%); }
.modal::backdrop { background: rgb(32 50 46 / 48%); backdrop-filter: blur(3px); }
.modal > h2 { padding-right: 28px; }
.type-dialog-overlay { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 20px; background: rgb(32 50 46 / 55%); }
.type-dialog { width: min(440px, 100%); min-height: 0; padding: 26px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.type-dialog input { width: 100%; margin: 14px 0 6px; }
.type-dialog-status { min-height: 1.5em; margin: 0 0 18px; color: var(--ink-soft); }
.type-dialog-status.is-error { color: var(--pink-700); }
.type-dialog-status.is-ok { color: var(--blue-700); }
.login-panel { width: min(480px, 100%); margin: auto; }
.create-paper-entry { min-height: 0 !important; margin-bottom: 16px; padding: 14px 18px !important; }
.create-paper-entry .button-link { padding: 9px 14px; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
button, a, select, input, textarea, label { cursor: url('/cursor.svg') 4 3, pointer; }
button:disabled, input:disabled, select:disabled, textarea:disabled { cursor: not-allowed; }

@media (min-width: 961px) {
  .grid article:hover, .panel:hover { box-shadow: 0 16px 38px rgb(32 50 46 / 11%); }
}
@media (max-width: 960px) {
  .grid, .builder-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .builder-meta, .paper-create-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filters, .paper-filter { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  main { padding: 28px 16px 54px; }
  header { margin: 22px 0 26px; }
  h1 { font-size: clamp(2.15rem, 12vw, 3.6rem); }
  .grid, .builder-grid, .builder-meta, .form-grid, .filters, .question-filter, .paper-filter, .paper-create-form { grid-template-columns: 1fr; }
  .section-selects, .batch-defaults { grid-template-columns: 1fr; }
  .form-grid .wide { grid-column: auto; }
  .grid article, .panel { padding: 18px; border-radius: var(--radius-md); }
  .site-header__inner { gap: 12px; padding-top: 11px; padding-bottom: 11px; }
  .site-brand { flex: 1 1 auto; }
  .site-brand__copy { gap: 8px; }
  .site-brand__logo { width: 198px; }
  .site-brand__copy small { flex: 0 0 60px; width: 60px; padding: 4px 0 4px 8px; line-height: 1.6; letter-spacing: .04em; white-space: normal; }
  .site-brand__copy small span { display: block; }
  .top-nav { align-items: flex-start; flex-wrap: wrap; }
  .site-footer__inner { align-items: flex-start; flex-direction: column; gap: 16px; }
  .panel-head { align-items: flex-start; flex-direction: column; }
  .actions > button, .actions > .button-link { width: 100%; }
  .paper-create-form > button { grid-column: auto; justify-self: stretch; }
  .notice { flex-direction: column; gap: 5px; }
  .modal { width: calc(100% - 20px); padding: 16px; border-radius: var(--radius-md); }
  .sticky-actions { position: static; }
}
/* The brand and toggle stay on one row. Navigation overlays the page rather
   than changing header height; hidden removes collapsed links from tab order. */
@media (max-width: 1000px) {
  .site-header__inner { min-height: 82px; }
  .site-menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .site-menu-panel { position: absolute; top: calc(100% + 8px); right: 16px; display: flex; flex-direction: column; align-items: stretch; width: min(360px, calc(100% - 32px)); max-height: min(70vh, 480px); max-height: min(70svh, 480px); overflow-y: auto; gap: 12px; padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow-md); }
  .site-menu-panel .site-nav { display: flex; flex-direction: column; align-items: stretch; gap: 4px; width: 100%; }
  .site-menu-panel .site-nav a { min-height: 44px; padding: 11px 14px; border-radius: 10px; }
  .site-menu-panel .site-session { justify-content: flex-start; min-width: 0; min-height: 40px; margin: 0; padding: 12px 14px 0; border-top: 1px solid var(--line); text-align: left; }
  .site-menu-panel .site-session button { min-height: 44px; }
}
@media (max-width: 440px) {
  .site-header:not(.site-header--login) .site-brand__copy small { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}


/* Explicit application visibility wins over grid/flex display rules. */
[hidden] { display: none !important; }