/* ===== 畅连优选 / 畅连掌柜 官网公共样式 ===== */

:root {
  /* 品牌色 */
  --primary: #3468ff;
  --primary-dark: #1f54e0;
  --primary-light: #eaf0ff;
  --secondary: #ff7a45;
  --accent: #18b8a8;

  /* 中性色 */
  --text-1: #1d2129;
  --text-2: #4e5969;
  --text-3: #86909c;
  --text-4: #c9cdd4;
  --bg-page: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-mute: #eef0f3;
  --border: #e5e6eb;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 999px;

  /* 尺寸 */
  --nav-height: 64px;
  --container-max: 1200px;
}

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

html, body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text-1);
  background: var(--bg-page);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ===== 布局容器 ===== */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-soft {
  background: var(--bg-soft);
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--text-1);
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-2);
  text-align: center;
  margin-bottom: 48px;
}

/* ===== 顶部导航 ===== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}

.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
}

.nav-logo img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
  list-style: none;
}

.nav-links a {
  font-size: 15px;
  color: var(--text-2);
  padding: 8px 4px;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.nav-user {
  display: none;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.nav-user img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-mute);
}

.nav-user .nickname {
  font-size: 14px;
  color: var(--text-2);
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.logged-in .nav-user {
  display: flex;
}

body.logged-in .nav-login-btn {
  display: none;
}

/* ===== 按钮 ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
  white-space: nowrap;
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--primary-light);
  color: var(--primary);
}

.btn-secondary:hover {
  background: #dde6ff;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-1);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  padding: 8px 12px;
}

.btn-ghost:hover {
  color: var(--primary);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* ===== 卡片 ===== */

.card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-grid {
  display: grid;
  gap: 24px;
}

.card-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ===== 页脚 ===== */

.footer {
  background: #1d2129;
  color: #c9cdd4;
  padding: 56px 0 24px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 14px;
  color: #86909c;
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 16px;
  font-weight: 600;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 14px;
  color: #c9cdd4;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid #2c2f33;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: #86909c;
}

.footer-bottom a {
  color: #86909c;
  margin-left: 16px;
}

.footer-bottom a:hover {
  color: #c9cdd4;
}

/* ===== 表单 ===== */

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 8px;
  font-weight: 500;
}

.form-label .required {
  color: #f53f3f;
  margin-left: 4px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-1);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(52, 104, 255, 0.12);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  color: #f53f3f;
  font-size: 13px;
  margin-top: 6px;
  min-height: 18px;
}

.form-hint {
  color: var(--text-3);
  font-size: 13px;
  margin-top: 6px;
}

/* ===== 提示条 ===== */

.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-success {
  background: #e8ffea;
  color: #00b42a;
  border: 1px solid #b3f0c0;
}

.alert-error {
  background: #ffece8;
  color: #f53f3f;
  border: 1px solid #fdcdc5;
}

/* ===== 标签 ===== */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  font-size: 12px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}

.tag-success {
  background: #e8ffea;
  color: #00b42a;
}

.tag-warning {
  background: #fff7e8;
  color: #ff7a45;
}

.tag-muted {
  background: var(--bg-mute);
  color: var(--text-3);
}

/* ===== 模态框 ===== */

.modal-mask {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-mask.show {
  display: flex;
}

.modal {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px;
  width: 90%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.modal-close {
  float: right;
  cursor: pointer;
  color: var(--text-3);
  font-size: 20px;
  line-height: 1;
}

/* ===== 响应式 ===== */

@media (max-width: 1024px) {
  .card-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }
  .section-title {
    font-size: 26px;
  }
  .container {
    padding: 0 16px;
  }
  .nav-links {
    display: none;
  }
  .card-grid-2,
  .card-grid-3,
  .card-grid-4 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
  .footer-bottom a {
    margin: 0 8px;
  }
  .btn-lg {
    padding: 12px 22px;
    font-size: 15px;
  }
}