/* ===== 房贷计算器 全局样式（响应式） ===== */
:root {
  --primary: #0f766e;
  --primary-light: #14b8a6;
  --primary-bg: #ecfdf5;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --bg: #f8fafc;
  --card: #ffffff;
  --danger: #dc2626;
  --radius: 12px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px 48px;
}

/* 顶部导航 */
.topbar {
  background: linear-gradient(135deg, #0f766e, #0d9488);
  color: #fff;
  padding: 14px 16px;
}
.topbar .inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar .logo { font-size: 18px; font-weight: 700; }
.topbar .logo span { font-weight: 400; opacity: .85; font-size: 13px; }
.topbar nav a {
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  margin-left: 18px;
  opacity: .9;
}
.topbar nav a:hover { opacity: 1; text-decoration: underline; }

/* 卡片 */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.card h2 {
  font-size: 17px;
  margin-bottom: 16px;
  color: var(--text);
  border-left: 4px solid var(--primary);
  padding-left: 10px;
}

/* 表单 */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.form-item { display: flex; flex-direction: column; }
.form-item.full { grid-column: 1 / -1; }
.form-item label {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 6px;
}
.form-item input,
.form-item select,
.form-item textarea {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  width: 100%;
  transition: border-color .15s;
}
.form-item input:focus,
.form-item select:focus,
.form-item textarea:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(20,184,166,.15);
}

/* 还款方式切换 */
.method-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.method-tabs button {
  flex: 1;
  min-width: 130px;
  padding: 10px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  color: var(--text-light);
  font-family: inherit;
  transition: all .15s;
}
.method-tabs button.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* 按钮 */
.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: opacity .15s;
}
.btn-primary { background: var(--primary); color: #fff; width: 100%; }
.btn-primary:hover { opacity: .9; }
.btn-danger { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.btn-outline {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--primary);
}

/* 结果 */
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 8px;
}
.result-box {
  background: var(--primary-bg);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
}
.result-box .label { font-size: 12px; color: var(--text-light); }
.result-box .value {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-top: 4px;
}
.result-box .value small { font-size: 12px; font-weight: 400; }

/* 明细表 */
.detail-table-wrap { overflow-x: auto; margin-top: 16px; }
table.detail {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  white-space: nowrap;
}
table.detail th, table.detail td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: right;
}
table.detail th:first-child, table.detail td:first-child { text-align: left; }
table.detail th { color: var(--text-light); font-weight: 500; background: #f9fafb; }
table.detail tr:hover { background: #fafafa; }

/* 文章列表 */
.article-list { list-style: none; }
.article-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.article-list li:last-child { border-bottom: none; }
.article-list .art-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}
.article-list .art-title:hover { color: var(--primary); }
.article-list .art-summary {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-list .art-time {
  font-size: 12px;
  color: #9ca3af;
  margin-top: 6px;
}
.empty {
  text-align: center;
  color: var(--text-light);
  padding: 30px 0;
  font-size: 14px;
}

/* 文章详情 */
.article-detail h1 {
  font-size: 22px;
  line-height: 1.4;
  margin-bottom: 8px;
}
.article-detail .meta {
  font-size: 13px;
  color: var(--text-light);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.article-detail .content { font-size: 15px; }
.article-detail .content p { margin-bottom: 12px; }
.article-detail .content img { max-width: 100%; border-radius: 8px; }
.article-detail .content h3 { margin: 16px 0 8px; }

/* 后台 */
.login-box {
  max-width: 360px;
  margin: 60px auto;
  text-align: center;
}
.login-box .form-item { text-align: left; margin-bottom: 14px; }
.admin-toolbar {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.admin-toolbar .btn { flex: 1; min-width: 120px; }
.hidden { display: none !important; }

/* 提示条 */
.toast {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: #111827;
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 999;
  opacity: 0;
  transition: opacity .25s;
  pointer-events: none;
  max-width: 90vw;
}
.toast.show { opacity: 1; }

/* 移动端适配 */
@media (max-width: 520px) {
  .container { padding: 0 12px 32px; }
  .card { padding: 16px; }
  .form-grid { grid-template-columns: 1fr; }
  .result-box .value { font-size: 18px; }
  .topbar .logo { font-size: 16px; }
  .topbar nav a { margin-left: 12px; font-size: 13px; }
}