/* ===== 己丑班 - 中式古典风格 ===== */

:root {
  --red: #8B0000;
  --red-light: #a52a2a;
  --gold: #D4A017;
  --gold-light: #f0d77b;
  --ink: #2c2c2c;
  --ink-light: #555;
  --cream: #FFF8F0;
  --cream-dark: #f5ede0;
  --white: #ffffff;
  --border: #e0d5c5;
  --shadow: rgba(44, 44, 44, 0.1);
  --radius: 6px;
  --font-serif: 'Noto Serif SC', 'SimSun', serif;
  --font-sans: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--cream);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='120' viewBox='0 0 200 120'%3E%3Cpath d='M0 60 Q25 45 50 60 T100 60 T150 60 T200 60' fill='none' stroke='%238B0000' stroke-width='0.5' opacity='0.04'/%3E%3Cpath d='M0 70 Q25 55 50 70 T100 70 T150 70 T200 70' fill='none' stroke='%238B0000' stroke-width='0.5' opacity='0.03'/%3E%3Cpath d='M0 80 Q25 65 50 80 T100 80 T150 80 T200 80' fill='none' stroke='%238B0000' stroke-width='0.5' opacity='0.03'/%3E%3Cpath d='M0 40 Q25 25 50 40 T100 40 T150 40 T200 40' fill='none' stroke='%238B0000' stroke-width='0.4' opacity='0.03'/%3E%3Cpath d='M0 50 Q25 35 50 50 T100 50 T150 50 T200 50' fill='none' stroke='%238B0000' stroke-width='0.4' opacity='0.035'/%3E%3Cpath d='M0 90 Q30 78 60 90 T120 90 T180 90' fill='none' stroke='%23D4A017' stroke-width='0.3' opacity='0.03'/%3E%3Cpath d='M0 100 Q30 88 60 100 T120 100 T180 100' fill='none' stroke='%23D4A017' stroke-width='0.3' opacity='0.025'/%3E%3C/svg%3E");
  background-size: 200px 120px;
  min-height: 100vh;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 顶部导航 ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 2px solid var(--red);
  box-shadow: 0 2px 8px var(--shadow);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  max-width: 900px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--red);
  color: var(--white);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  border-radius: 4px;
  transform: rotate(-3deg);
  border: 1px solid var(--red-light);
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition: 0.3s;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 0;
  padding: 0 20px;
  max-width: 900px;
  margin: 0 auto;
}

.nav-item {
  padding: 10px 16px;
  text-decoration: none;
  color: var(--ink-light);
  font-size: 14px;
  border-bottom: 3px solid transparent;
  transition: all 0.3s;
  white-space: nowrap;
}

.nav-item:hover {
  color: var(--red);
}

.nav-item.active {
  color: var(--red);
  border-bottom-color: var(--red);
  font-weight: 500;
}

/* ===== 管理员浮动按钮 ===== */
.admin-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99;
}

.admin-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--white);
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 4px 12px var(--shadow);
  transition: transform 0.2s;
}

.admin-btn:hover { transform: scale(1.1); }
.admin-btn.logged-in { border-color: var(--gold); background: #fffbe6; }

/* ===== 弹窗 ===== */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.show { display: flex; }

.modal-content {
  background: var(--white);
  border-radius: var(--radius);
  padding: 30px;
  max-width: 420px;
  width: 100%;
  border-top: 4px solid var(--red);
}

.modal-large { max-width: 600px; max-height: 80vh; overflow-y: auto; }

.modal-content h3 {
  font-family: var(--font-serif);
  margin-bottom: 16px;
  color: var(--red);
}

.modal-content input[type="password"],
.modal-content input[type="text"],
.modal-content input[type="number"],
.modal-content input[type="date"] {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 12px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.error-msg { color: var(--red); font-size: 13px; margin-top: 8px; }

/* ===== 按钮 ===== */
.btn {
  padding: 8px 18px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--red);
  color: var(--white);
}
.btn-primary:hover { background: var(--red-light); }

.btn-secondary {
  background: var(--cream-dark);
  color: var(--ink);
}
.btn-secondary:hover { background: var(--border); }

.btn-sm { padding: 4px 10px; font-size: 12px; }

/* ===== Hero/首页 ===== */
.hero {
  position: relative;
  padding: 60px 20px;
  text-align: center;
  background: linear-gradient(135deg, #1a0000 0%, #3d0000 50%, #1a0000 100%);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.1;
  background-image:
    radial-gradient(circle at 20% 50%, var(--gold) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, var(--gold) 0%, transparent 50%);
}

.hero-content { position: relative; z-index: 1; }

.hero-title {
  font-family: var(--font-serif);
  font-size: 32px;
  color: var(--gold-light);
  margin-bottom: 8px;
  letter-spacing: 4px;
}

.hero-subtitle {
  color: rgba(255,255,255,0.8);
  font-size: 14px;
  margin-bottom: 16px;
}

.hero-info {
  display: flex;
  justify-content: center;
  gap: 20px;
  color: rgba(255,255,255,0.7);
  font-size: 13px;
}

/* ===== 内容卡片 ===== */
.intro-card, .committee-section, .query-box, .finance-detail, .reflection-form {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  margin: 20px 0;
  border: 1px solid var(--border);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--red);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.section-desc {
  color: var(--ink-light);
  font-size: 14px;
  margin-bottom: 20px;
}

/* ===== 班委展示 ===== */
.committee-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.committee-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.committee-row-label {
  font-size: 13px;
  color: var(--gold);
  font-weight: 500;
  min-width: 3em;
}

.committee-name {
  font-family: var(--font-serif);
  font-size: 15px;
  padding: 4px 12px;
  background: var(--cream);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* ===== 课程时间线 ===== */
.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
  padding: 20px;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.timeline-item:hover {
  border-color: var(--gold);
  box-shadow: 0 2px 8px var(--shadow);
}

.timeline-item.current {
  border-left: 4px solid var(--red);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cream-dark);
  border: 2px solid var(--border);
}

.timeline-item.current::before {
  background: var(--red);
  border-color: var(--red);
}

.timeline-item.past::before {
  background: var(--gold);
  border-color: var(--gold);
}

.timeline-number {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--red);
}

.timeline-date {
  font-size: 13px;
  color: var(--ink-light);
  margin: 2px 0 6px;
}

.timeline-content {
  font-size: 14px;
  font-weight: 500;
}

.timeline-goal {
  display: none;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  font-size: 13px;
  color: var(--ink-light);
  line-height: 1.8;
}

.timeline-item.expanded .timeline-goal { display: block; }

.timeline-status {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: 8px;
}

.status-done { background: #e8f5e9; color: #2e7d32; }
.status-current { background: #fff3e0; color: #e65100; }
.status-upcoming { background: #f5f5f5; color: #999; }

/* ===== 班级风采 ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.gallery-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--white);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.gallery-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.gallery-card:hover img {
  transform: scale(1.03);
}

.gallery-card .caption {
  padding: 14px 16px;
  font-size: 13px;
  border-top: 1px solid var(--border);
}

.gallery-card .caption-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
  color: var(--ink);
}

.gallery-card .caption-date {
  color: var(--ink-light);
  font-size: 12px;
  line-height: 1.5;
}

/* ===== 延伸阅读 ===== */
.book-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.book-card {
  display: flex;
  gap: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.book-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}

.book-cover {
  flex-shrink: 0;
  width: 100px;
  height: 140px;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px 8px;
  text-align: center;
  box-shadow: 2px 2px 8px rgba(0,0,0,0.2);
  position: relative;
  overflow: hidden;
}

.book-cover::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: rgba(0,0,0,0.15);
}

.book-cover-title {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
  text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.book-cover-author {
  font-size: 10px;
  color: rgba(255,255,255,0.8);
  margin-top: 8px;
}

.book-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.book-info-title {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.book-info-author {
  font-size: 13px;
  color: var(--ink-light);
  margin-bottom: 10px;
}

.book-info-desc {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.8;
}

@media (max-width: 480px) {
  .book-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .book-info { align-items: center; }
}

/* ===== 收支公示 ===== */
.finance-overview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.fin-card {
  background: var(--white);
  padding: 20px;
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--border);
}

.fin-label { font-size: 13px; color: var(--ink-light); }
.fin-value { font-size: 24px; font-weight: 700; margin: 4px 0; font-family: var(--font-serif); }
.fin-value.income { color: #2e7d32; }
.fin-value.expense { color: var(--red); }
.fin-value.balance { color: var(--gold); }
.fin-note { font-size: 12px; color: var(--ink-light); }

.query-input-group {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.query-input-group input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
}

.query-result {
  margin-top: 12px;
  padding: 12px;
  background: var(--cream);
  border-radius: var(--radius);
  display: none;
}

.query-result.show { display: block; }

.activity-list { margin-top: 16px; }

.activity-item {
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
}

.activity-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.activity-name { font-weight: 500; }
.activity-cost { font-family: var(--font-serif); color: var(--red); font-weight: 600; }
.activity-meta { font-size: 12px; color: var(--ink-light); margin-top: 4px; }

/* ===== 参与人员选择 ===== */
.participant-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.selected-count { font-size: 13px; color: var(--ink-light); margin-left: auto; }

.participant-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 6px;
  max-height: 200px;
  overflow-y: auto;
  padding: 8px;
  background: var(--cream);
  border-radius: var(--radius);
}

.participant-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  padding: 4px 6px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s;
}

.participant-item:hover { background: var(--cream-dark); }
.participant-item.selected { background: #e8f5e9; }
.participant-item input { margin: 0; }

.per-person {
  font-size: 20px;
  font-weight: 700;
  color: var(--red);
  font-family: var(--font-serif);
}

/* ===== 学员心得 ===== */
.reflection-form textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--font-sans);
  resize: vertical;
}

.reflection-form input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
}

.reflection-list { margin-top: 20px; }

.reflection-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
  position: relative;
}

.reflection-author {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--red);
}

.reflection-date { font-size: 12px; color: var(--ink-light); }
.reflection-text { margin-top: 8px; font-size: 14px; line-height: 1.8; }

.reflection-delete {
  position: absolute;
  top: 12px;
  right: 12px;
  background: none;
  border: none;
  color: #999;
  cursor: pointer;
  font-size: 16px;
}

/* ===== 同学录 ===== */
.roster-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.roster-group-label {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--red);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--border);
  letter-spacing: 2px;
}

.roster-group-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}

.roster-card {
  perspective: 600px;
  height: 160px;
  cursor: pointer;
}

.roster-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
  pointer-events: none;
}

@media (hover: hover) {
  .roster-card:hover .roster-card-inner {
    transform: rotateY(180deg);
  }
}

.roster-card.flipped .roster-card-inner {
  transform: rotateY(180deg);
}

.roster-front, .roster-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px;
}

.roster-front {
  background: var(--white);
}

.roster-back {
  background: var(--ink);
  color: var(--gold-light);
  transform: rotateY(180deg);
  font-size: 12px;
  text-align: center;
}

.roster-gender {
  font-size: 24px;
  margin-bottom: 6px;
}

.roster-name {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
}

.roster-role {
  font-size: 11px;
  color: var(--gold);
  margin-top: 4px;
  background: #fffbe6;
  padding: 2px 8px;
  border-radius: 10px;
}

.roster-bazi {
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.roster-note {
  font-size: 11px;
  color: rgba(255,255,255,0.6);
}

/* ===== 空状态 ===== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--ink-light);
}

.empty-state .hint { font-size: 13px; margin-top: 4px; }

/* ===== 页脚 ===== */
.footer {
  text-align: center;
  padding: 30px 20px;
  margin-top: 40px;
  border-top: 2px solid var(--red);
  background: var(--white);
}

.footer p { font-size: 13px; color: var(--ink-light); }

.footer-quote {
  font-family: var(--font-serif);
  font-style: italic;
  margin-top: 8px;
  color: var(--gold);
}

/* ===== Section显示控制 ===== */
.section { display: none; padding: 30px 0; }
.section.active { display: block; }

/* ===== 表单通用 ===== */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; color: var(--ink-light); margin-bottom: 4px; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .menu-toggle { display: flex; }

  .nav {
    display: none;
    flex-direction: column;
    padding: 0;
  }

  .nav.open { display: flex; }

  .nav-item {
    padding: 12px 20px;
    border-bottom: 1px solid var(--cream-dark);
    border-left: 3px solid transparent;
  }

  .nav-item.active {
    border-bottom-color: var(--cream-dark);
    border-left-color: var(--red);
  }

  .hero-title { font-size: 24px; }

  .finance-overview {
    grid-template-columns: 1fr;
  }

  .fin-card { padding: 14px; }
  .fin-value { font-size: 20px; }

  .roster-group-cards {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 8px;
  }

  .roster-card { height: 140px; }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }

  .committee-card {
    padding: 10px 14px;
  }
}

@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: 1fr; }
  .hero-info { flex-direction: column; gap: 6px; }
}