:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-soft: #f8faf9;
  --ink: #182421;
  --muted: #697974;
  --subtle: #8c9995;
  --line: #dfe7e4;
  --line-strong: #c9d7d2;
  --green: #24765a;
  --green-dark: #155a44;
  --green-soft: #e8f4ef;
  --blue: #315f9f;
  --blue-soft: #eaf1fb;
  --red: #bb4c45;
  --red-soft: #fff0ef;
  --gold: #b48727;
  --gold-soft: #fff7df;
  --shadow-sm: 0 8px 24px rgba(24, 36, 33, 0.08);
  --shadow: 0 18px 48px rgba(24, 36, 33, 0.12);
  --shadow-lg: 0 28px 80px rgba(24, 36, 33, 0.16);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 6%, rgba(36, 118, 90, 0.13), transparent 32%),
    linear-gradient(160deg, rgba(49, 95, 159, 0.1), transparent 30%),
    var(--bg);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.42) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.36) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, #000 0, transparent 72%);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 0;
  font-size: 48px;
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 14px;
  font-size: 18px;
  line-height: 1.58;
  letter-spacing: 0;
}

.topbar {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: flex-end;
  padding: 34px 56px 28px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(246, 250, 248, 0.88)),
    linear-gradient(90deg, rgba(36, 118, 90, 0.12), rgba(49, 95, 159, 0.08));
  border-bottom: 1px solid rgba(201, 215, 210, 0.85);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
}

.topbar::after {
  content: "600";
  position: absolute;
  right: 80px;
  top: -34px;
  color: rgba(36, 118, 90, 0.06);
  font-size: 220px;
  line-height: 1;
  font-weight: 900;
  z-index: 0;
}

.topbar > * {
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin: 0 0 10px;
  padding: 5px 10px;
  color: var(--green-dark);
  background: rgba(232, 244, 239, 0.92);
  border: 1px solid #c5ded4;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 800;
}

.student-panel,
.toolbar,
.group,
.exam-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.student-panel {
  justify-content: flex-end;
  min-width: 300px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(201, 215, 210, 0.78);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 11px 12px;
  color: var(--ink);
  background: #fff;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

select {
  min-width: 128px;
}

input:hover,
select:hover,
textarea:hover {
  border-color: var(--line-strong);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(36, 118, 90, 0.13);
}

main {
  position: relative;
  z-index: 1;
  width: min(1220px, calc(100% - 32px));
  margin: 24px auto 54px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.summary-card,
.source-note,
.toolbar,
.exam-hero,
.paper,
.note-card,
.day-card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(213, 224, 220, 0.92);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.summary-card {
  position: relative;
  min-height: 150px;
  padding: 18px;
  overflow: hidden;
}

.summary-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--green);
}

.summary-card span,
.summary-card small {
  display: block;
}

.summary-card span {
  color: var(--muted);
  font-weight: 900;
}

.summary-card strong {
  display: block;
  margin: 10px 0 6px;
  font-size: 34px;
  line-height: 1;
}

.summary-card small {
  color: var(--muted);
  line-height: 1.5;
}

.accent-cn::before {
  background: var(--red);
}

.accent-math::before {
  background: var(--green);
}

.accent-en::before {
  background: var(--blue);
}

.accent-total::before {
  background: var(--gold);
}

.progress {
  height: 8px;
  margin-top: 14px;
  overflow: hidden;
  background: #edf2f0;
  border-radius: 999px;
}

.progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), #d4a743);
  border-radius: inherit;
  transition: width 0.25s ease;
}

.source-note {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
  padding: 15px 16px;
  color: var(--muted);
  background: rgba(255, 251, 239, 0.94);
  border-color: #ead9aa;
  line-height: 1.65;
}

.source-note strong,
.source-note span {
  display: block;
}

.source-note strong {
  color: var(--ink);
}

.source-links {
  display: flex;
  gap: 8px;
  flex: 0 0 auto;
}

.source-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 11px;
  color: var(--green-dark);
  background: #f4faf7;
  border: 1px solid #c7ded4;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 900;
}

.tabs {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  gap: 8px;
  padding: 8px;
  margin-bottom: 18px;
  overflow-x: auto;
  background: rgba(235, 241, 238, 0.86);
  border: 1px solid rgba(208, 221, 216, 0.94);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(18px);
  scrollbar-width: thin;
}

.tab {
  flex: 1 0 auto;
  min-width: 108px;
  border: 0;
  border-radius: 7px;
  padding: 12px 14px;
  color: var(--muted);
  background: transparent;
  font-weight: 900;
  white-space: nowrap;
  transition: color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.tab:hover {
  color: var(--green-dark);
  background: rgba(255, 255, 255, 0.72);
}

.tab.active {
  color: #fff;
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  box-shadow: 0 10px 20px rgba(36, 118, 90, 0.24);
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.toolbar,
.exam-hero {
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  margin-bottom: 16px;
}

.exam-hero {
  display: flex;
  align-items: center;
}

.exam-hero p,
.toolbar p,
.empty-state p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.primary,
.secondary,
.ghost {
  min-height: 43px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  padding: 10px 16px;
  font-weight: 900;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease, border-color 0.16s ease;
}

.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  box-shadow: 0 12px 24px rgba(36, 118, 90, 0.22);
}

.secondary {
  color: var(--green-dark);
  background: var(--green-soft);
  border-color: #bdd8cd;
}

.ghost {
  color: var(--red);
  background: var(--red-soft);
  border-color: #efcbc7;
}

.primary:hover,
.secondary:hover,
.ghost:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
  box-shadow: none;
}

.paper {
  padding: 20px;
}

.empty-state {
  min-height: 240px;
  display: grid;
  place-content: center;
  text-align: center;
}

.compact {
  min-height: 150px;
}

.question-list {
  display: grid;
  gap: 14px;
}

.question-card {
  position: relative;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fff, #fbfdfc);
  box-shadow: 0 10px 26px rgba(24, 36, 33, 0.06);
}

.question-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: 7px;
  color: #fff;
  background: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.topic {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-align: right;
}

.options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.option {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  width: 100%;
  min-height: 50px;
  padding: 12px;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  box-shadow: 0 4px 12px rgba(24, 36, 33, 0.04);
}

.option:hover {
  border-color: var(--green);
  background: #fbfffd;
}

.option.selected {
  background: var(--green-soft);
  border-color: var(--green);
}

.option.correct {
  background: #e7f7ef;
  border-color: #69aa8d;
}

.option.wrong {
  background: var(--red-soft);
  border-color: #db8078;
}

.answer-line {
  display: grid;
  gap: 10px;
}

.text-answer {
  width: min(520px, 100%);
}

.process-answer {
  width: 100%;
  min-height: 120px;
}

.rubric-list,
.note-card ul,
.day-card ul,
.parent-tips ul,
.memory-box ol {
  color: var(--muted);
  line-height: 1.8;
}

.rubric-list {
  margin: 8px 0 0;
  padding-left: 20px;
}

.speak-card {
  display: grid;
  gap: 12px;
  padding: 13px;
  background: #f6faf8;
  border: 1px solid #c9ded5;
  border-radius: var(--radius);
}

.speaking-stars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.speaking-stars label,
.rubric-slider {
  color: var(--muted);
  font-size: 14px;
}

.speaking-stars input,
.rubric-slider input {
  width: 100%;
  accent-color: var(--green);
}

.feedback {
  display: none;
  margin-top: 14px;
  padding: 13px;
  border-radius: var(--radius);
  color: var(--muted);
  background: #f1f6f4;
  border: 1px solid #d8e6e1;
  line-height: 1.7;
}

.feedback.show {
  display: block;
}

.check-row {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.result-box {
  margin-bottom: 16px;
  padding: 16px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #edf8f3, #f8fcfa);
  border: 1px solid #c6dfd4;
  line-height: 1.7;
}

.result-box strong {
  color: var(--green-dark);
}

.timer {
  min-width: 94px;
  padding: 10px 13px;
  color: var(--green-dark);
  background: #f5faf7;
  border: 1px solid #bddbce;
  border-radius: var(--radius);
  font-size: 20px;
  font-weight: 900;
  text-align: center;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(152px, 1fr));
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.day-card,
.note-card {
  padding: 16px;
}

.day-card {
  min-width: 152px;
}

.day-card h3 {
  margin-bottom: 10px;
  font-size: 18px;
}

.task-check {
  display: flex;
  grid-template-columns: none;
  gap: 8px;
  align-items: flex-start;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.task-check input {
  width: 17px;
  height: 17px;
  margin-top: 5px;
  padding: 0;
  accent-color: var(--green);
}

.task-check input:checked + span {
  color: var(--green-dark);
  text-decoration: line-through;
}

.notes-grid,
.parent-layout,
.writing-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.notes-grid {
  margin-bottom: 16px;
}

.note-example {
  padding: 12px;
  color: var(--green-dark);
  background: #eef7f2;
  border: 1px solid #c8dfd5;
  border-radius: var(--radius);
  line-height: 1.7;
}

.note-tools {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 16px;
  align-items: start;
}

.memory-box .question-head {
  margin-bottom: 8px;
}

.memory-box h2 {
  margin-bottom: 0;
}

.parent-layout .paper:first-child {
  grid-row: span 2;
}

.rubric-slider {
  display: grid;
  grid-template-columns: 1fr 140px 34px;
  gap: 12px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.rubric-slider span {
  display: grid;
  gap: 4px;
}

.rubric-slider small {
  color: var(--muted);
  line-height: 1.5;
}

.rubric-slider b {
  color: var(--green-dark);
  text-align: right;
}

.total-row {
  margin-top: 12px;
}

.report-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.report-row span {
  color: var(--muted);
}

.report-row strong {
  text-align: right;
}

.parent-buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 18px 0 10px;
}

.parent-buttons button {
  width: 100%;
}

.status-line {
  min-height: 24px;
  margin-bottom: 8px;
  color: var(--green-dark);
  font-weight: 900;
}

textarea {
  width: 100%;
  min-height: 190px;
  resize: vertical;
  line-height: 1.7;
}

.subject-cn .badge {
  background: linear-gradient(135deg, var(--red), #963d38);
}

.subject-math .badge {
  background: linear-gradient(135deg, var(--green), var(--green-dark));
}

.subject-en .badge {
  background: linear-gradient(135deg, var(--blue), #234b82);
}

.mistake-tools {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

@media (max-width: 980px) {
  .topbar,
  .exam-hero {
    align-items: stretch;
    flex-direction: column;
  }

  h1 {
    font-size: 40px;
  }

  .topbar {
    padding: 28px 24px 22px;
  }

  .topbar::after {
    right: 24px;
    font-size: 170px;
  }

  .student-panel,
  .exam-actions {
    justify-content: flex-start;
  }

  .student-panel {
    min-width: 0;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .source-note {
    align-items: flex-start;
    flex-direction: column;
  }

  .parent-layout,
  .notes-grid,
  .writing-layout {
    grid-template-columns: 1fr;
  }

  .parent-layout .paper:first-child {
    grid-row: auto;
  }

  .note-tools {
    grid-template-columns: 1fr;
  }

  .options,
  .speaking-stars {
    grid-template-columns: 1fr;
  }

  .rubric-slider {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  body::before {
    background-size: 32px 32px;
  }

  .topbar {
    padding: 22px 14px 18px;
  }

  .topbar::after {
    right: -16px;
    top: 4px;
    font-size: 118px;
  }

  h1 {
    font-size: 30px;
    line-height: 1.14;
  }

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 16px;
  }

  main {
    width: min(100% - 18px, 1220px);
    margin-top: 12px;
  }

  .summary-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .summary-card {
    min-height: 118px;
    padding: 16px;
  }

  .summary-card strong {
    font-size: 30px;
  }

  .source-links,
  .group,
  .student-panel,
  .toolbar,
  .exam-actions {
    width: 100%;
  }

  .source-links {
    flex-wrap: wrap;
  }

  .student-panel label,
  .toolbar label,
  .toolbar select,
  .toolbar button,
  .group label,
  .group button,
  .exam-actions label,
  .exam-actions button,
  .primary,
  .secondary,
  .ghost {
    width: 100%;
  }

  .tabs {
    margin-left: -2px;
    margin-right: -2px;
    padding: 7px;
  }

  .tab {
    min-width: 98px;
    padding: 11px 12px;
    font-size: 14px;
  }

  .toolbar,
  .exam-hero,
  .paper {
    padding: 15px;
  }

  .question-card {
    padding: 15px;
  }

  .question-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .topic {
    text-align: left;
  }

  .check-row {
    justify-content: stretch;
  }

  .check-row button {
    width: 100%;
  }

  .parent-buttons {
    grid-template-columns: 1fr;
  }

  .plan-grid {
    grid-template-columns: repeat(7, 78vw);
  }
}

@media print {
  body {
    background: #fff;
  }

  body::before,
  .topbar,
  .tabs,
  .toolbar,
  .exam-hero,
  .parent-buttons,
  .status-line {
    display: none;
  }

  main {
    width: 100%;
    margin: 0;
  }

  .view {
    display: block;
  }

  .paper,
  .summary-card,
  .note-card,
  .day-card {
    box-shadow: none;
    break-inside: avoid;
  }
}