/* ========================================
   帮助与反馈页面 - 各板块样式
   风格参考 E:\Desktop\NaHong\index.html（section-header + 卡片网格）
   与 contact.css / news.css 保持同一设计 token（nav.css：--blue-500 / --gray-*）
   ======================================== */

/* ========================================
   面包屑导航 (与 contact.css 保持一致)
   ======================================== */
.hf-breadcrumb {
  margin-top: var(--navbar-height);
  padding: 14px 0;
  background-color: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}

.hf-breadcrumb a {
  font-size: 13px;
  color: var(--gray-500);
  letter-spacing: 0.5px;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.hf-breadcrumb a:hover {
  color: var(--gray-800);
}

.hf-breadcrumb .hf-bc-separator {
  margin: 0 8px;
  color: var(--gray-400);
  font-size: 12px;
}

.hf-breadcrumb .hf-bc-current {
  font-size: 13px;
  color: var(--gray-800);
  letter-spacing: 0.5px;
  font-weight: 500;
}

/* ========================================
   顶部标题区
   ======================================== */
.hf-header {
  padding: 64px 0 48px;
  background-color: #ffffff;
  text-align: center;
}

.hf-header h1 {
  font-size: 34px;
  font-weight: 700;
  color: #333333;
  letter-spacing: 3px;
  margin-bottom: 12px;
}

.hf-header .hf-header-line {
  display: block;
  width: 40px;
  height: 3px;
  background-color: var(--blue-500);
  margin: 0 auto 14px;
}

.hf-header p {
  font-size: 15px;
  color: var(--gray-500);
  letter-spacing: 1px;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ========================================
   区域通用（背景交替，区块顺序：FAQ→文档→热线→表单）
   ======================================== */
.hf-section {
  padding: 64px 0;
}

/* 内容容器：与首页/新闻页一致，最大 1500px 居中 */
.hf-container {
  width: min(100% - 40px, 1500px);
  margin: 0 auto;
}

.hf-section:nth-child(even) {
  background-color: var(--gray-50);
}

.hf-section:nth-child(odd) {
  background-color: #ffffff;
}

.hf-section-title {
  font-size: 22px;
  font-weight: 700;
  color: #333333;
  letter-spacing: 2px;
  text-align: center;
  margin-bottom: 8px;
}

.hf-section-subtitle {
  font-size: 13px;
  color: var(--gray-400);
  letter-spacing: 1px;
  text-align: center;
  margin-bottom: 36px;
}

/* ========================================
   1. 常见问题（手风琴，原生 details/summary，无 JS）
   ======================================== */
.hf-faq {
  margin: 0;
}

.hf-faq-group {
  margin-bottom: 36px;
}

.hf-faq-group:last-child {
  margin-bottom: 0;
}

.hf-faq-group-title {
  font-size: 17px;
  font-weight: 700;
  color: #333333;
  letter-spacing: 1px;
  padding-left: 12px;
  border-left: 3px solid var(--blue-500);
  margin-bottom: 14px;
}

.hf-faq-item {
  background-color: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.hf-faq-item[open] {
  border-color: rgba(43, 108, 176, 0.35);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.hf-faq-item summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--transition-fast);
}

.hf-faq-item summary::-webkit-details-marker {
  display: none;
}

.hf-faq-item summary:hover {
  background-color: var(--gray-50);
}

.hf-faq-question {
  flex: 1;
  font-size: 15px;
  font-weight: 600;
  color: #333333;
  letter-spacing: 0.5px;
  line-height: 1.6;
}

.hf-faq-toggle {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--gray-400);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-normal), color var(--transition-fast);
}

.hf-faq-toggle svg {
  width: 100%;
  height: 100%;
}

.hf-faq-item[open] .hf-faq-toggle {
  transform: rotate(45deg);
  color: var(--blue-500);
}

.hf-faq-answer {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--gray-600);
  letter-spacing: 0.4px;
  line-height: 1.9;
}

/* ========================================
   2. 帮助文档卡片（四列，风格参考首页卡片网格）
   ======================================== */
.hf-docs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.hf-doc-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: #ffffff;
  border-radius: 12px;
  padding: 36px 28px 32px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  text-align: center;
  text-decoration: none;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

a.hf-doc-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.hf-doc-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: rgba(43, 108, 176, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hf-doc-icon img {
  width: 28px;
  height: 28px;
  display: block;
}

.hf-doc-title {
  font-size: 17px;
  font-weight: 700;
  color: #333333;
  letter-spacing: 1px;
  margin: 16px 0 8px;
}

.hf-doc-desc {
  font-size: 13px;
  color: var(--gray-500);
  letter-spacing: 0.4px;
  line-height: 1.7;
  margin-bottom: 14px;
}

.hf-doc-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue-500);
  letter-spacing: 0.5px;
  transition: gap var(--transition-fast);
}

.hf-doc-link svg {
  width: 14px;
  height: 14px;
}

a.hf-doc-card:hover .hf-doc-link {
  gap: 9px;
}

/* ========================================
   3. 服务热线横幅（与联系页风格一致）
   ======================================== */
.hf-hotline-banner {
  background: linear-gradient(135deg, var(--gray-900) 0%, #2a2a2a 100%);
  border-radius: 12px;
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.hf-hb-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hf-hb-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hf-hb-icon img {
  width: 36px;
  height: 36px;
  filter: brightness(0) invert(1);
}

.hf-hb-text {
  color: #ffffff;
}

.hf-hb-small {
  font-size: 13px;
  opacity: 0.7;
  letter-spacing: 1px;
  display: block;
  margin-bottom: 2px;
}

.hf-hb-large {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 2px;
}

.hf-hb-right {
  margin: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.5px;
  line-height: 1.6;
  max-width: 380px;
  text-align: right;
}

/* ========================================
   4. 在线反馈表单 (Contact Form 7)
   ======================================== */
.hf-form-card {
  background-color: #ffffff;
  border-radius: 12px;
  padding: 40px 48px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.hf-form-card .cf7-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.hf-form-card .cf7-row.cf7-full {
  grid-template-columns: 1fr;
}

.hf-form-card .cf7-field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-600);
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.hf-form-card .cf7-field label .wpcf7-form-control-wrap {
  display: block;
  margin-top: 6px;
}

.hf-form-card .cf7-field input[type="text"],
.hf-form-card .cf7-field input[type="tel"],
.hf-form-card .cf7-field input[type="email"],
.hf-form-card .cf7-field textarea,
.hf-form-card .wpcf7-form input[type="text"],
.hf-form-card .wpcf7-form input[type="tel"],
.hf-form-card .wpcf7-form input[type="email"],
.hf-form-card .wpcf7-form textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  font-size: 14px;
  color: var(--gray-900);
  background-color: #ffffff;
  letter-spacing: 0.4px;
  box-sizing: border-box;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.hf-form-card .cf7-field input:focus,
.hf-form-card .cf7-field textarea:focus,
.hf-form-card .wpcf7-form input:focus,
.hf-form-card .wpcf7-form textarea:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.12);
}

.hf-form-card .cf7-field textarea,
.hf-form-card .wpcf7-form textarea {
  min-height: 140px;
  resize: vertical;
}

.hf-form-card .cf7-submit,
.hf-form-card .wpcf7-form p:last-child {
  margin-top: 8px;
  text-align: center;
}

.hf-form-card .cf7-submit .wpcf7-submit,
.hf-form-card .wpcf7-form input[type="submit"] {
  background-color: var(--blue-500);
  color: #ffffff;
  border: none;
  padding: 14px 56px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.hf-form-card .cf7-submit .wpcf7-submit:hover,
.hf-form-card .wpcf7-form input[type="submit"]:hover {
  background-color: #245a94;
}

.hf-form-card .wpcf7-not-valid-tip {
  font-size: 12px;
  color: #e53e3e;
  margin-top: 4px;
  letter-spacing: 0.4px;
}

.hf-form-card .wpcf7-response-output {
  margin: 20px 0 0;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 13px;
  letter-spacing: 0.4px;
  border-width: 1px;
}

.hf-form-card .wpcf7 form.invalid .wpcf7-response-output,
.hf-form-card .wpcf7 form.unaccepted .wpcf7-response-output {
  border-color: #e53e3e;
  color: #c53030;
  background-color: #fff5f5;
}

.hf-form-card .wpcf7 form.sent .wpcf7-response-output {
  border-color: #38a169;
  color: #276749;
  background-color: #f0fff4;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1200px) {
  .hf-docs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1024px) {
  .hf-container {
    width: min(100% - 48px, 900px);
  }
}

@media (max-width: 768px) {
  .hf-header {
    padding-top: 40px;
    padding-bottom: 32px;
  }

  .hf-section {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .hf-docs-grid {
    grid-template-columns: 1fr;
  }

  .hf-form-card {
    padding: 28px 20px;
  }

  .hf-form-card .cf7-row {
    grid-template-columns: 1fr;
  }

  .hf-hotline-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 24px;
  }

  .hf-hb-right {
    text-align: left;
    max-width: none;
  }
}

@media (max-width: 640px) {
  .hf-container {
    width: calc(100% - 32px);
  }
}