/* 东方茶品牌主题
   米白底 / 普洱熟茶棕主调 / 印章朱砂红强调 */

:root {
  --color-bg: #f5f1e8;          /* 米白 */
  --color-bg-alt: #ebe4d3;      /* 米黄 */
  --color-ink: #2a2017;         /* 浓墨 */
  --color-ink-soft: #5c4e3c;    /* 淡墨 */
  --color-tea: #6b4423;         /* 熟普洱棕 */
  --color-tea-deep: #4a2f17;    /* 深茶 */
  --color-gold: #b89968;        /* 茶汤金 */
  --color-seal: #b8392f;        /* 印章朱砂红 */
  --color-seal-soft: #d4675d;
  --color-line: #d4c9b3;       /* 分隔线 */
  --shadow-sm: 0 2px 8px rgba(74, 47, 23, 0.08);
  --shadow-md: 0 4px 16px rgba(74, 47, 23, 0.12);
  --radius: 4px;
  --font-han: "Noto Serif SC", "STZhongsong", "PingFang SC", "Microsoft YaHei", serif;
  --font-en: -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1410;
    --color-bg-alt: #2a1f17;
    --color-ink: #f0e8d4;
    --color-ink-soft: #b8a890;
    --color-tea: #c89968;
    --color-tea-deep: #e0b888;
    --color-line: #4a3f30;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-han);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
#app { max-width: 720px; margin: 0 auto; padding: 24px 20px 80px; }

/* ========== 品牌栏 ========== */
.brand-header {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 0 24px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 32px;
}
.brand-seal {
  width: 56px; height: 56px;
  background: var(--color-seal);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: bold;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.brand-text h1 {
  font-size: 22px; font-weight: 600; color: var(--color-tea-deep);
  letter-spacing: 1px;
}
.brand-text p {
  font-size: 12px; color: var(--color-ink-soft);
  margin-top: 4px; letter-spacing: 1px;
}

/* ========== 进度条 ========== */
.progress-bar {
  position: sticky; top: 0; background: var(--color-bg);
  padding: 12px 0; margin-bottom: 24px; z-index: 10;
  border-bottom: 1px solid var(--color-line);
}
.progress-fill {
  height: 3px; background: var(--color-tea);
  width: 0%; transition: width 0.3s ease;
  border-radius: 2px;
}
.progress-text {
  display: block; font-size: 12px; color: var(--color-ink-soft);
  margin-top: 6px; letter-spacing: 1px;
}

/* ========== 阶段通用 ========== */
.stage { min-height: 60vh; }

/* ========== 首页 ========== */
.hero-content { text-align: center; padding: 60px 20px; }
.hero-content h2 {
  font-size: 36px; color: var(--color-tea-deep);
  margin-bottom: 16px; font-weight: 600;
  letter-spacing: 2px;
}
.hero-subtitle {
  font-size: 16px; color: var(--color-ink-soft);
  margin-bottom: 32px; letter-spacing: 1px;
}
.hero-tip {
  font-size: 12px; color: var(--color-ink-soft);
  margin-top: 24px; opacity: 0.7;
}

/* ========== 按钮 ========== */
.btn-primary, .btn-secondary {
  border: none; cursor: pointer; padding: 12px 24px;
  border-radius: var(--radius); font-family: inherit;
  font-size: 15px; letter-spacing: 1px;
  transition: all 0.2s ease;
}
.btn-primary {
  background: var(--color-tea); color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-tea-deep); transform: translateY(-1px); }
.btn-primary:disabled {
  background: var(--color-line); cursor: not-allowed;
  transform: none;
}
.btn-secondary {
  background: transparent; color: var(--color-tea);
  border: 1px solid var(--color-tea);
}
.btn-secondary:hover { background: var(--color-bg-alt); }
.btn-large { padding: 16px 40px; font-size: 17px; }

/* ========== 问卷 ========== */
.question-card {
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-tea);
  padding: 32px 28px; border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.question-group-title {
  font-size: 12px; color: var(--color-seal);
  letter-spacing: 2px; margin-bottom: 12px;
  font-weight: 600;
}
.question-card h3 {
  font-size: 18px; color: var(--color-ink);
  margin-bottom: 24px; line-height: 1.6;
}
.question-title-row {
  display: flex; align-items: flex-start;
  gap: 12px; margin-bottom: 24px;
  flex-wrap: wrap;
}
.question-title-row h3 {
  flex: 1; min-width: 200px;
  margin-bottom: 0;
}
.type-badge {
  display: inline-flex; align-items: center;
  padding: 4px 10px; font-size: 12px;
  letter-spacing: 1px; font-weight: 600;
  border-radius: 3px;
  background: var(--color-seal);
  color: #fff;
  flex-shrink: 0;
  margin-top: 4px;
}
.type-badge.multi {
  background: var(--color-seal);
}
.type-badge.single {
  background: var(--color-tea);
}
.options-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.option-item {
  background: var(--color-bg); padding: 14px 16px;
  border: 1px solid var(--color-line); border-radius: var(--radius);
  cursor: pointer; transition: all 0.15s ease;
  display: flex; align-items: center; gap: 12px;
}
.option-item:hover { border-color: var(--color-tea); background: var(--color-bg-alt); }
.option-item.selected {
  background: var(--color-tea); color: #fff;
  border-color: var(--color-tea-deep);
}
.option-item .key {
  width: 28px; height: 28px; display: flex; align-items: center;
  justify-content: center; border-radius: 50%;
  border: 1px solid var(--color-line);
  font-size: 13px; font-weight: 600; flex-shrink: 0;
}
.option-item.selected .key {
  background: rgba(255, 255, 255, 0.2); border-color: transparent; color: #fff;
}
.option-item .text { flex: 1; font-size: 15px; }
.hint {
  font-size: 12px; color: var(--color-ink-soft);
  margin-top: 8px; opacity: 0.7;
  min-height: 16px;
}
.nav-buttons {
  display: flex; justify-content: space-between;
  margin-top: 32px; padding-top: 24px;
  border-top: 1px solid var(--color-line);
}

/* ========== 加载 ========== */
.loading-content { text-align: center; padding: 80px 20px; }
.seal-pulse {
  width: 96px; height: 96px;
  margin: 0 auto 32px;
  background: var(--color-seal); color: #fff;
  font-size: 48px; font-weight: bold;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.85; }
}
.loading-content h2 {
  font-size: 24px; color: var(--color-tea-deep); margin-bottom: 12px;
}
.loading-content p { color: var(--color-ink-soft); margin-bottom: 32px; }
.loading-spinner {
  width: 40px; height: 40px; margin: 0 auto;
  border: 3px solid var(--color-line);
  border-top-color: var(--color-tea);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== 报告 ========== */
.report-header {
  display: flex; justify-content: space-between;
  align-items: center; margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-tea);
}
.report-header h2 {
  font-size: 26px; color: var(--color-tea-deep);
  letter-spacing: 2px;
}
.report-actions { display: flex; gap: 12px; }
.report-content {
  background: var(--color-bg-alt);
  padding: 32px 28px; border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  font-size: 15px; line-height: 1.8;
  white-space: pre-wrap;
}
.report-content h3 {
  color: var(--color-seal); margin: 20px 0 10px;
  font-size: 17px; letter-spacing: 1px;
  border-left: 3px solid var(--color-seal);
  padding-left: 12px;
}
.report-content strong { color: var(--color-tea-deep); }
.report-content ul { padding-left: 20px; margin: 8px 0; }
.report-content li { margin-bottom: 6px; }
.report-disclaimer {
  margin-top: 20px; padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius);
  font-size: 12px; color: var(--color-ink-soft);
  text-align: center; line-height: 1.6;
}

.explainer-section {
  margin-top: 28px;
  border: 1px solid var(--color-tea);
  border-radius: var(--radius);
  background: var(--color-bg);
  overflow: hidden;
}
.explainer-section > summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-tea);
  cursor: pointer;
  user-select: none;
  list-style: none;
  background: rgba(122, 79, 50, 0.05);
}
.explainer-section > summary::-webkit-details-marker { display: none; }
.explainer-section > summary::before {
  content: "▶";
  display: inline-block;
  margin-right: 8px;
  font-size: 11px;
  transition: transform 0.2s;
}
.explainer-section[open] > summary::before { transform: rotate(90deg); }
.explainer-content {
  padding: 24px 20px;
  color: var(--color-ink);
  font-size: 15px;
  line-height: 1.85;
  white-space: pre-wrap;
}
.explainer-content h3 {
  color: var(--color-tea);
  font-size: 16px;
  margin: 18px 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px dashed rgba(122, 79, 50, 0.3);
}
.explainer-content h3:first-child { margin-top: 0; }
.explainer-content ul { padding-left: 20px; margin: 8px 0; }
.explainer-content li { margin-bottom: 6px; }
.explainer-content strong { color: var(--color-seal); }

/* ========== 访问码横幅 ========== */
.access-banner {
  display: flex; gap: 24px; flex-wrap: wrap;
  margin-bottom: 24px; padding: 20px 24px;
  background: var(--color-bg-alt);
  border: 1px dashed var(--color-tea);
  border-radius: var(--radius);
}
.access-code-box, .access-share { flex: 1; min-width: 240px; }
.access-label {
  display: block; font-size: 12px; color: var(--color-ink-soft);
  margin-bottom: 8px; letter-spacing: 1px;
}
.access-code {
  font-size: 32px; font-weight: 700; letter-spacing: 8px;
  color: var(--color-seal); font-family: "Courier New", monospace;
}
.share-row { display: flex; gap: 8px; }
.share-row input {
  flex: 1; padding: 8px 12px; font-size: 13px;
  border: 1px solid var(--color-border, #d8cfc4);
  border-radius: 4px; background: var(--color-bg);
  color: var(--color-ink);
}
.btn-sm { padding: 6px 14px; font-size: 13px; }

/* ========== 解锁框(分享页) ========== */
.unlock-box {
  margin-top: 28px; padding: 24px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  text-align: center;
}
.unlock-row {
  display: flex; gap: 12px; justify-content: center;
  margin: 16px 0 8px;
}
.unlock-row input {
  width: 200px; padding: 10px 16px;
  font-size: 20px; letter-spacing: 6px; text-align: center;
  border: 2px solid var(--color-tea); border-radius: 6px;
  background: var(--color-bg); color: var(--color-ink);
}

/* ========== 管理员后台 ========== */
.admin-login {
  max-width: 420px; margin: 60px auto; padding: 32px;
  background: var(--color-bg-alt); border-radius: var(--radius);
  text-align: center;
}
.admin-login h3 { margin-bottom: 16px; color: var(--color-tea); }
.admin-login input {
  display: block; width: 100%; padding: 10px 14px;
  margin-bottom: 16px; font-size: 15px;
  border: 1px solid var(--color-border, #d8cfc4); border-radius: 4px;
  background: var(--color-bg); color: var(--color-ink);
}
.admin-stats {
  display: flex; gap: 16px; margin-bottom: 24px;
}
.stat-card {
  flex: 1; padding: 20px;
  background: var(--color-bg-alt); border-radius: var(--radius);
  text-align: center; font-size: 13px; color: var(--color-ink-soft);
}
.stat-num { font-size: 32px; font-weight: 700; color: var(--color-tea-deep); margin-bottom: 4px; }
.report-table { display: flex; flex-direction: column; gap: 12px; }
.report-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 18px; background: var(--color-bg-alt);
  border-radius: var(--radius); border-left: 3px solid var(--color-tea);
}
.report-meta { display: flex; flex-direction: column; gap: 4px; }
.report-rid { font-family: "Courier New", monospace; font-weight: 700; color: var(--color-ink); }
.report-time { font-size: 12px; color: var(--color-ink-soft); }
.report-actions-row { display: flex; gap: 8px; align-items: center; }
.status-tag {
  padding: 4px 10px; border-radius: 4px;
  background: rgba(122, 79, 50, 0.15); color: var(--color-tea);
  font-size: 13px; font-weight: 600;
}

/* ========== 弹窗 ========== */
.modal {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
}
.modal-box {
  background: var(--color-bg); padding: 32px 28px;
  border-radius: var(--radius); max-width: 420px; width: 90%;
  text-align: center;
}
.modal-box h3 { color: var(--color-tea-deep); margin-bottom: 8px; }
.modal-input {
  width: 100%; padding: 12px; margin: 16px 0;
  font-size: 22px; letter-spacing: 8px; text-align: center;
  border: 2px solid var(--color-tea); border-radius: 6px;
  background: var(--color-bg-alt); color: var(--color-ink);
}
.modal-actions { display: flex; gap: 12px; justify-content: center; }
.report-divider {
  height: 1px; background: var(--color-border, #d8cfc4);
  margin: 32px 0 24px;
}
.section-title {
  color: var(--color-tea-deep); font-size: 20px;
  margin-bottom: 16px; font-weight: 600;
}

/* ========== Toast ========== */
.toast {
  position: fixed; bottom: 32px; left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-ink); color: var(--color-bg);
  padding: 12px 24px; border-radius: var(--radius);
  font-size: 14px; opacity: 0;
  transition: all 0.3s ease;
  z-index: 1000;
  max-width: 90%;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ========== 响应式 ========== */
@media (max-width: 600px) {
  .hero-content h2 { font-size: 28px; }
  .question-card { padding: 24px 20px; }
  .brand-text h1 { font-size: 18px; }
  .nav-buttons { flex-direction: column; gap: 12px; }
  .nav-buttons button { width: 100%; }
  .report-actions { flex-direction: column; gap: 8px; }
}