/* ═══════════ 冬季主题变量 ═══════════ */
:root {
  --primary: #1e6ba8;
  --primary-hover: #155a8f;
  --primary-light: #e8f4fc;
  --accent: #00bcd4;
  --accent-light: #e0f7fa;
  --ice: #b3e5fc;
  --text: #1a2b3f;
  --text-secondary: #5a7085;
  --text-tertiary: #94a9bd;
  --bg: #eef5fb;
  --card-bg: #ffffff;
  --border: #d6e6f2;
  --border-hover: #a8cde6;
  --shadow-sm: 0 1px 3px rgba(30,107,168,0.06);
  --transition: all 0.2s ease;
}

/* ═══════════ 子页面头部 ═══════════ */
.page-header {
  background: linear-gradient(180deg, #ffffff 0%, #f0f8ff 100%);
  border-bottom: 2px solid var(--border);
  padding: 12px 0;
}
.page-header-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.page-logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
}
.page-logo::before {
  content: "❄";
  font-size: 18px;
  color: var(--accent);
  margin-right: 4px;
  animation: logoSpin 8s linear infinite;
  display: inline-block;
}
@keyframes logoSpin {
  to { transform: rotate(360deg); }
}
.page-logo span {
  font-size: 13px;
  color: var(--text-tertiary);
  font-weight: 400;
  margin-left: 4px;
}
.page-nav {
  display: flex;
  gap: 0;
}
.page-nav a {
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 3px;
  transition: var(--transition);
}
.page-nav a:hover {
  color: var(--primary);
  background: var(--primary-light);
  text-decoration: none;
}
.page-nav a.active {
  color: var(--primary);
  font-weight: 700;
  background: var(--primary-light);
  box-shadow: inset 0 -2px 0 var(--accent);
}

/* ═══════════ 面包屑 ═══════════ */
.page-breadcrumb {
  max-width: 1000px;
  margin: 10px auto;
  padding: 0 10px;
  font-size: 12px;
  color: var(--text-tertiary);
}
.page-breadcrumb a { color: var(--text-secondary); }
.page-breadcrumb a:hover { color: var(--primary); }
.page-breadcrumb span { color: var(--text-tertiary); margin: 0 5px; }

/* ═══════════ 两栏布局 ═══════════ */
.page-container {
  max-width: 1000px;
  margin: 0 auto 20px;
  padding: 0 10px;
  display: flex;
  gap: 15px;
  align-items: flex-start;
}
.page-sidebar {
  width: 160px;
  flex-shrink: 0;
}
.sidebar-menu {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.sidebar-menu a {
  display: block;
  padding: 10px 15px;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid #f0f7fc;
  border-left: 3px solid transparent;
  transition: var(--transition);
}
.sidebar-menu a:last-child { border-bottom: none; }
.sidebar-menu a:hover {
  background: var(--primary-light);
  color: var(--primary);
  text-decoration: none;
}
.sidebar-menu a.active {
  background: var(--primary-light);
  color: var(--primary);
  border-left-color: var(--accent);
  font-weight: 700;
}

.page-main {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 25px;
  min-width: 0;
  box-shadow: var(--shadow-sm);
}
.page-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
  position: relative;
}
.page-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}
.page-main h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin: 20px 0 10px;
  padding-left: 10px;
  border-left: 3px solid var(--accent);
}
.page-main h3:first-of-type { margin-top: 0; }
.page-main p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 10px;
}
.page-main ul {
  padding-left: 22px;
  margin-bottom: 12px;
}
.page-main ul li {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.9;
}
.page-main a { color: var(--primary); }
.page-main a:hover { color: var(--primary-hover); }

/* ═══════════ 时间轴 ═══════════ */
.timeline {
  position: relative;
  padding-left: 22px;
  margin: 10px 0 20px;
}
.timeline:before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--ice), var(--accent), var(--primary));
}
.timeline-item {
  position: relative;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.timeline-item:before {
  content: "❄";
  position: absolute;
  left: -26px;
  top: 0;
  width: 14px;
  height: 14px;
  background: var(--card-bg);
  color: var(--accent);
  border-radius: 50%;
  font-size: 10px;
  line-height: 14px;
  text-align: center;
  box-shadow: 0 0 0 2px var(--primary-light);
}
.timeline-year {
  font-weight: 700;
  color: var(--primary);
  margin-right: 8px;
}

/* ═══════════ 信息表格 ═══════════ */
.info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-bottom: 16px;
  border-radius: 4px;
  overflow: hidden;
}
.info-table th, .info-table td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
}
.info-table th {
  background: linear-gradient(180deg, #f5f9fc 0%, #e8f4fc 100%);
  color: var(--text);
  font-weight: 700;
  width: 120px;
}
.info-table td { color: var(--text-secondary); }
.info-table tr:hover td { background: #fafcfe; }

/* ═══════════ 表单 ═══════════ */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: 13px;
  color: var(--text);
  margin-bottom: 6px;
  font-weight: 700;
}
.form-label .required { color: #e5484d; margin-left: 3px; }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 13px;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
  box-sizing: border-box;
  background: var(--card-bg);
  color: var(--text);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30,107,168,0.12);
}
.form-input::placeholder, .form-textarea::placeholder {
  color: var(--text-tertiary);
}
.form-textarea { resize: vertical; min-height: 120px; }
.form-tip { font-size: 12px; color: var(--text-tertiary); margin-top: 4px; }
.form-submit {
  padding: 8px 30px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}
.form-submit:hover {
  filter: brightness(1.1);
  box-shadow: 0 4px 12px rgba(30,107,168,0.2);
}
.form-submit:active { filter: brightness(0.95); }
.form-reset {
  padding: 8px 30px;
  background: var(--card-bg);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
  margin-left: 10px;
  font-family: inherit;
  transition: var(--transition);
}
.form-reset:hover {
  background: var(--primary-light);
  border-color: var(--border-hover);
  color: var(--primary);
}

/* ═══════════ FAQ 折叠 ═══════════ */
.faq-item {
  border-bottom: 1px solid #eef5fb;
}
.faq-item:last-child { border-bottom: none; }
.faq-question {
  padding: 12px 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-question:before {
  content: "❄";
  display: inline-block;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-radius: 3px;
  font-size: 11px;
  text-align: center;
  line-height: 18px;
  font-weight: 700;
}
.faq-question:after {
  content: "＋";
  margin-left: auto;
  color: var(--text-tertiary);
  font-size: 14px;
  font-weight: 400;
  transition: transform 0.2s;
}
.faq-item.open .faq-question:after {
  content: "－";
  color: var(--primary);
}
.faq-item.open .faq-question { color: var(--primary); }
.faq-answer {
  padding: 0 0 14px 26px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.9;
  display: none;
}
.faq-item.open .faq-answer { display: block; }

/* ═══════════ 提示信息 ═══════════ */
.notice-box {
  background: #f0f8ff;
  border: 1px solid var(--ice);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  font-size: 13px;
  color: var(--primary-hover);
  border-radius: 4px;
  margin-bottom: 16px;
  line-height: 1.8;
}
.notice-box strong { color: var(--primary); }
.success-box {
  background: #f0f9f4;
  border: 1px solid #c8e6d2;
  border-left: 3px solid #34a853;
  padding: 10px 14px;
  font-size: 13px;
  color: #1e6b3c;
  border-radius: 4px;
  margin-bottom: 16px;
  line-height: 1.8;
}

/* ═══════════ 联系方式卡片 ═══════════ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}
.contact-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 15px;
  background: linear-gradient(180deg, #fafcfe 0%, #f0f8ff 100%);
  transition: var(--transition);
}
.contact-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 2px 8px rgba(30,107,168,0.08);
}
.contact-card .cc-label {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.contact-card .cc-value {
  font-size: 13px;
  color: var(--text);
  font-weight: 700;
}
.contact-card .cc-value a { color: var(--primary); font-weight: 400; }
.contact-card .cc-value a:hover { color: var(--primary-hover); }

/* ═══════════ 页脚（如子页面单独使用） ═══════════ */
.site-footer {
  background: linear-gradient(180deg, #f0f8ff 0%, #dceaf7 100%);
  border-top: 1px solid var(--border);
  padding: 22px 20px;
  text-align: center;
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 20px;
}
.footer-links { margin: 8px 0; }
.footer-links a { color: var(--text-secondary); margin: 0 6px; }
.footer-links a:hover { color: var(--primary); }

/* ═══════════ 响应式 ═══════════ */
@media (max-width: 768px) {
  .page-header-inner { flex-direction: column; align-items: flex-start; gap: 10px; }
  .page-nav { flex-wrap: wrap; }
  .page-container { flex-direction: column; }
  .page-sidebar { width: 100%; }
  .sidebar-menu { display: flex; flex-wrap: wrap; }
  .sidebar-menu a {
    border-bottom: none;
    border-right: 1px solid #f0f7fc;
    flex: 1;
    text-align: center;
    padding: 8px;
    border-left: none;
    border-top: 3px solid transparent;
  }
  .sidebar-menu a.active {
    border-left: none;
    border-top-color: var(--accent);
  }
  .page-main { padding: 15px; }
  .contact-grid { grid-template-columns: 1fr; }
}