/* 调查问卷平台 — 通用样式：简洁、大气、正式，蓝白配色 */

:root {
  --color-primary: #16407a;
  --color-primary-dark: #0e2e59;
  --color-primary-light: #3d6bab;
  --color-bg: #ffffff;
  --color-bg-soft: #f4f7fb;
  --color-bg-soft-hover: #eaf0f9;
  --color-border: #dce3ee;
  --color-border-strong: #c3d0e3;
  --color-text: #1c2733;
  --color-text-secondary: #5b6b80;
  --color-text-muted: #8a96a6;
  --color-danger: #b3413b;
  --color-danger-bg: #fbeceb;
  --color-success: #1f7a4d;
  --color-success-bg: #eaf6ef;
  --color-warning: #9a6a14;
  --color-warning-bg: #fbf1de;
  --shadow-card: 0 1px 2px rgba(16, 40, 80, 0.06), 0 4px 16px rgba(16, 40, 80, 0.06);
  --radius: 8px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei",
    "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg-soft);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
p,
ul,
ol {
  margin: 0 0 0.6em 0;
}

a {
  color: var(--color-primary);
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: 640px;
}

.container--wide {
  max-width: 1120px;
}

/* ---------- 顶部条 ---------- */

.topbar {
  background: var(--color-primary);
  color: #fff;
}

.topbar__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar__title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #fff;
}

/* ---------- 卡片 ---------- */

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 32px;
}

.card + .card {
  margin-top: 20px;
}

.section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

/* ---------- 排版 ---------- */

.page-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.page-subtitle {
  color: var(--color-text-secondary);
  font-size: 14.5px;
  white-space: pre-wrap;
}

.text-muted {
  color: var(--color-text-muted);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 24px 0;
}

/* ---------- 表单 ---------- */

label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.field {
  margin-bottom: 18px;
}

.field__hint {
  font-size: 12.5px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

input[type="text"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  font-family: inherit;
  font-size: 14.5px;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border-strong);
  border-radius: 6px;
  padding: 9px 12px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea {
  resize: vertical;
  min-height: 84px;
  font-family: inherit;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(22, 64, 122, 0.12);
}

input[type="radio"],
input[type="checkbox"] {
  accent-color: var(--color-primary);
  width: 16px;
  height: 16px;
  margin: 0;
  vertical-align: middle;
}

.choice-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 2px;
  font-size: 14.5px;
  cursor: pointer;
}

.choice-row input {
  margin-top: 3px;
  flex: none;
}

.choice-row:hover {
  color: var(--color-primary-dark);
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: #fff;
  color: var(--color-primary);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-soft-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg-soft-hover);
  color: var(--color-text);
}

.btn-danger {
  background: #fff;
  color: var(--color-danger);
  border-color: #e6c4c1;
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-danger-bg);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 5px 12px;
  font-size: 13px;
}

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ---------- 徽章 / 状态 ---------- */

.badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  line-height: 1.8;
}

.badge-draft {
  background: #eef1f5;
  color: var(--color-text-secondary);
}

.badge-published {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-closed {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.required-mark {
  color: var(--color-danger);
  margin-left: 3px;
}

/* ---------- 提示条 ---------- */

.alert {
  border-radius: 6px;
  padding: 11px 14px;
  font-size: 13.5px;
  margin-bottom: 16px;
}

.alert-error {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.alert-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.alert-info {
  background: var(--color-bg-soft-hover);
  color: var(--color-primary-dark);
}

/* ---------- 表格 ---------- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

th {
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: var(--color-bg-soft);
}

tbody tr:hover {
  background: var(--color-bg-soft);
}

/* ---------- 统计条形图（原生 div，不依赖图表库） ---------- */

.stat-row {
  display: grid;
  grid-template-columns: 140px 1fr 90px;
  align-items: center;
  gap: 12px;
  font-size: 13.5px;
  padding: 6px 0;
}

.stat-row__label {
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stat-row__bar {
  background: var(--color-bg-soft);
  border-radius: 4px;
  height: 10px;
  overflow: hidden;
}

.stat-row__bar-fill {
  background: var(--color-primary);
  height: 100%;
  border-radius: 4px;
}

.stat-row__value {
  color: var(--color-text-secondary);
  text-align: right;
}

.question-item.invalid .question-item__label {
  color: var(--color-danger);
}

/* ---------- 空状态 ---------- */

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--color-text-muted);
}

/* ---------- 工具类 ---------- */

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.mt-24 {
  margin-top: 24px;
}

.center {
  text-align: center;
}

/* ==========================================================================
   向导式问卷填写页（一题一屏）
   仅供 public/survey.html 使用，全部为新增类，不影响既有样式
   ========================================================================== */

.survey-page {
  padding-top: 40px;
  padding-bottom: 72px;
}

.wizard-desc {
  margin-top: 8px;
  margin-bottom: 0;
}

/* ---------- 顶部固定进度条 ---------- */

.wizard-progress {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--color-bg-soft);
  padding: 18px 0 14px;
  margin-bottom: 18px;
}

.wizard-progress__track {
  height: 4px;
  border-radius: 999px;
  background: var(--color-border);
  overflow: hidden;
}

.wizard-progress__fill {
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

.wizard-progress__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
}

/* 角落里极轻量的"保存中/已保存"状态 */
.wizard-save {
  font-size: 12px;
  color: var(--color-text-muted);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.wizard-save.is-on {
  opacity: 1;
}

/* ---------- 恢复进度提示 ---------- */

.wizard-notice {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  margin-bottom: 20px;
  border-radius: 6px;
  background: var(--color-bg-soft-hover);
  color: var(--color-primary-dark);
  font-size: 13px;
  transition: opacity 0.5s ease;
}

.wizard-notice.is-fading {
  opacity: 0;
}

.wizard-notice[hidden] {
  display: none;
}

/* ---------- 题面卡片 ---------- */

.wizard-card {
  padding: 36px 34px 28px;
}

.wizard-stage {
  min-height: 240px;
}

.wizard-step {
  opacity: 0;
}

.wizard-step[hidden] {
  display: none;
}

.wizard-step--in {
  opacity: 1;
  animation: wizardStepIn 0.26s ease;
}

.wizard-step--back.wizard-step--in {
  animation-name: wizardStepInBack;
}

@keyframes wizardStepIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes wizardStepInBack {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.wizard-step__caption {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 12.5px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.wizard-tag {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 1px 9px;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.wizard-tag--required {
  border-color: #e6c4c1;
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.wizard-step__title {
  font-size: 21px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--color-text);
  margin-bottom: 20px;
}

.wizard-step__hint {
  margin: -8px 0 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ---------- 选项行 ---------- */

.wizard-choice {
  align-items: center;
  gap: 12px;
  min-height: 54px;
  padding: 14px 16px;
  margin-bottom: 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.wizard-choice input {
  margin-top: 0;
}

.wizard-choice__text {
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.5;
}

.wizard-choice:hover {
  border-color: var(--color-primary-light);
  background: var(--color-bg-soft);
}

.wizard-choice.is-selected {
  border-color: var(--color-primary);
  background: var(--color-bg-soft);
  box-shadow: inset 0 0 0 1px var(--color-primary);
}

.wizard-choice.is-disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.wizard-choice.is-disabled:hover {
  border-color: var(--color-border);
  background: #fff;
}

/* "其他(请注明)"说明框 */
.wizard-other {
  display: none;
  margin: -2px 0 12px;
  padding-left: 16px;
}

.wizard-other.is-open {
  display: block;
}

.wizard-other input {
  max-width: 380px;
}

/* 必答校验提示 */
.wizard-error {
  display: none;
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--color-danger);
}

.question-item.invalid .wizard-error {
  display: block;
}

/* ---------- 底部导航 ---------- */

.wizard-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.wizard-nav__prev.is-hidden {
  visibility: hidden;
}

.wizard-nav__next {
  min-width: 148px;
  padding-top: 11px;
  padding-bottom: 11px;
}

.wizard-kbd-hint {
  margin-top: 16px;
  text-align: center;
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ---------- 结果页 ---------- */

.wizard-final {
  padding: 64px 32px;
}

.wizard-final__title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

/* ---------- 移动端 ---------- */

@media (max-width: 600px) {
  .survey-page {
    padding-top: 28px;
    padding-bottom: 48px;
  }

  .wizard-card {
    padding: 24px 18px 22px;
  }

  .wizard-step__title {
    font-size: 18.5px;
    margin-bottom: 18px;
  }

  .wizard-choice {
    min-height: 52px;
    padding: 13px 14px;
  }

  .wizard-other {
    padding-left: 0;
  }

  .wizard-nav__next {
    min-width: 120px;
  }

  .wizard-kbd-hint {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .wizard-step--in {
    animation: none;
  }

  .wizard-progress__fill {
    transition: none;
  }
}