/* ============================================================
   51爆料 - 消费者维权曝光平台 主样式表
   CSS/ID前缀: wb- (WeiBao)
   设计风格: 正义之锤法律风
   主色调: 正义深红(#8B0000) | 辅助色: 庄严黑(#1C1C1C) 公正白(#FFFFFF)
   Mobile-First 响应式设计
   ============================================================ */

/* ---- 基础重置与变量 ---- */
:root {
  --wb-red: #8B0000;
  --wb-red-light: #A52A2A;
  --wb-red-dark: #5C0000;
  --wb-black: #1C1C1C;
  --wb-black-light: #2A2A2A;
  --wb-white: #FFFFFF;
  --wb-gray: #E8E8E8;
  --wb-gray-dark: #666666;
  --wb-gold: #C8A951;
  --wb-gold-light: #D4B96E;
  --wb-shadow: 0 2px 12px rgba(0,0,0,0.18);
  --wb-shadow-heavy: 0 4px 24px rgba(0,0,0,0.32);
  --wb-font-title: "Source Han Serif SC","Noto Serif SC","SimSun","STSong",serif;
  --wb-font-body: "Source Han Sans SC","Noto Sans SC","Microsoft YaHei","PingFang SC",sans-serif;
  --wb-radius: 0;
  --wb-transition: 0.25s ease;
}

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

html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--wb-font-body);
  color: var(--wb-black);
  background: var(--wb-white);
  line-height: 1.8;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--wb-red); text-decoration: none; transition: color var(--wb-transition); }
a:hover { color: var(--wb-gold); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--wb-font-title);
  color: var(--wb-black);
  line-height: 1.4;
  font-weight: 700;
}

/* ---- 容器 ---- */
.wb-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ============================================================
   导航栏 (非Fixed/Sticky)
   ============================================================ */
#wb-header {
  background: var(--wb-red-dark);
  border-bottom: 3px solid var(--wb-gold);
  position: relative;
  z-index: 100;
}

#wb-top-bar {
  background: var(--wb-black);
  padding: 6px 0;
  font-size: 0.8rem;
  color: #aaa;
  text-align: center;
}

#wb-top-bar a { color: var(--wb-gold); }

#wb-nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  flex-wrap: wrap;
}

#wb-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

#wb-logo img {
  width: 44px;
  height: 44px;
}

.wb-logo-text {
  font-family: var(--wb-font-title);
  font-size: 1.3rem;
  color: var(--wb-white);
  font-weight: 700;
  letter-spacing: 1px;
}

.wb-logo-domain {
  display: block;
  font-size: 0.7rem;
  color: var(--wb-gold);
  font-family: var(--wb-font-body);
  letter-spacing: 0;
}

/* 汉堡菜单 */
#wb-hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

#wb-hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--wb-white);
  transition: var(--wb-transition);
}

#wb-hamburger.wb-active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
#wb-hamburger.wb-active span:nth-child(2) { opacity: 0; }
#wb-hamburger.wb-active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

#wb-main-nav {
  display: none;
  width: 100%;
  flex-direction: column;
  background: var(--wb-red-dark);
  padding: 10px 0;
}

#wb-main-nav.wb-open { display: flex; }

.wb-nav-link {
  display: block;
  padding: 10px 16px;
  color: var(--wb-white);
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: all var(--wb-transition);
}

.wb-nav-link:hover,
.wb-nav-link.wb-active {
  color: var(--wb-gold);
  background: rgba(255,255,255,0.05);
}

#wb-nav-right {
  display: none;
  align-items: center;
  gap: 10px;
}

#wb-search-box {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 4px 10px;
}

#wb-search-input {
  background: transparent;
  border: none;
  color: var(--wb-white);
  font-size: 0.85rem;
  outline: none;
  width: 140px;
}

#wb-search-input::placeholder { color: rgba(255,255,255,0.5); }

#wb-search-btn {
  background: none;
  border: none;
  color: var(--wb-gold);
  cursor: pointer;
  font-size: 1rem;
}

.wb-btn-submit-case {
  display: inline-block;
  background: var(--wb-gold);
  color: var(--wb-black);
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all var(--wb-transition);
}

.wb-btn-submit-case:hover {
  background: var(--wb-gold-light);
  color: var(--wb-black);
}

/* ============================================================
   Hero Banner 轮播
   ============================================================ */
#wb-hero {
  position: relative;
  overflow: hidden;
  background: var(--wb-black);
}

.wb-hero-slide {
  display: none;
  position: relative;
  min-height: 50vh;
  background-size: cover;
  background-position: center;
}

.wb-hero-slide.wb-slide-active { display: block; }

.wb-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(28,28,28,0.85) 0%, rgba(139,0,0,0.6) 100%);
  display: flex;
  align-items: center;
  padding: 40px 20px;
}

.wb-hero-content {
  max-width: 600px;
}

.wb-hero-content h2 {
  font-size: 1.6rem;
  color: var(--wb-white);
  margin-bottom: 12px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.wb-hero-content p {
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.wb-btn-primary {
  display: inline-block;
  background: var(--wb-red);
  color: var(--wb-white);
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: 700;
  border: 2px solid var(--wb-gold);
  cursor: pointer;
  transition: all var(--wb-transition);
  text-decoration: none;
}

.wb-btn-primary:hover {
  background: var(--wb-gold);
  color: var(--wb-black);
}

.wb-hero-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

.wb-hero-dot {
  width: 12px;
  height: 12px;
  background: rgba(255,255,255,0.4);
  border: none;
  cursor: pointer;
  transition: background var(--wb-transition);
}

.wb-hero-dot.wb-dot-active { background: var(--wb-gold); }

/* ============================================================
   通用区块标题
   ============================================================ */
.wb-section {
  padding: 40px 0;
}

.wb-section-alt {
  background: #F5F0EB;
}

.wb-section-dark {
  background: var(--wb-black);
  color: var(--wb-white);
}

.wb-section-dark h2,
.wb-section-dark h3 { color: var(--wb-white); }

.wb-section-header {
  text-align: center;
  margin-bottom: 32px;
}

.wb-section-header h2 {
  font-size: 1.6rem;
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
}

.wb-section-header h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--wb-red);
}

.wb-section-header p {
  color: var(--wb-gray-dark);
  margin-top: 10px;
  font-size: 0.9rem;
}

.wb-section-dark .wb-section-header p { color: rgba(255,255,255,0.7); }

/* ============================================================
   视频案件模块
   ============================================================ */
.wb-case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.wb-case-card {
  background: var(--wb-white);
  box-shadow: var(--wb-shadow);
  overflow: hidden;
  transition: transform var(--wb-transition), box-shadow var(--wb-transition);
}

.wb-case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--wb-shadow-heavy);
}

.wb-video-wrap {
  position: relative;
  background: var(--wb-black);
}

.wb-video-player {
  width: 100%;
  display: block;
}

.wb-case-info {
  padding: 16px;
}

.wb-case-info h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.wb-case-tag {
  display: inline-block;
  background: var(--wb-red);
  color: var(--wb-white);
  font-size: 0.7rem;
  padding: 2px 8px;
  margin-right: 6px;
  margin-bottom: 6px;
}

.wb-case-date {
  font-size: 0.8rem;
  color: var(--wb-gray-dark);
  margin-top: 6px;
}

/* ============================================================
   曝光黑榜
   ============================================================ */
.wb-blacklist-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.wb-blacklist-table thead {
  background: var(--wb-red-dark);
  color: var(--wb-white);
}

.wb-blacklist-table th,
.wb-blacklist-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--wb-gray);
}

.wb-blacklist-table tbody tr:hover {
  background: rgba(139,0,0,0.04);
}

.wb-status-badge {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 700;
}

.wb-status-exposed { background: #FFE0E0; color: var(--wb-red); }
.wb-status-punished { background: #E0FFE0; color: #006600; }
.wb-status-investigating { background: #FFF3D0; color: #996600; }

/* ============================================================
   维权知识库
   ============================================================ */
.wb-knowledge-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.wb-knowledge-item {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--wb-white);
  box-shadow: var(--wb-shadow);
  overflow: hidden;
}

.wb-knowledge-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.wb-knowledge-text {
  padding: 16px;
}

.wb-knowledge-text h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--wb-red-dark);
}

.wb-knowledge-text p {
  font-size: 0.88rem;
  color: #444;
  line-height: 1.7;
}

.wb-read-more {
  display: inline-block;
  margin-top: 10px;
  color: var(--wb-red);
  font-weight: 700;
  font-size: 0.85rem;
}

/* ============================================================
   经典案例分析
   ============================================================ */
.wb-case-analysis-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.wb-analysis-card {
  background: var(--wb-white);
  border-left: 4px solid var(--wb-red);
  box-shadow: var(--wb-shadow);
  padding: 20px;
  position: relative;
}

.wb-case-number {
  font-family: var(--wb-font-title);
  font-size: 0.75rem;
  color: var(--wb-gray-dark);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.wb-analysis-card h3 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.wb-case-result {
  display: inline-block;
  background: var(--wb-red);
  color: var(--wb-white);
  padding: 3px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 10px;
}

/* ============================================================
   投诉滚动墙
   ============================================================ */
#wb-complaint-wall {
  overflow: hidden;
  height: 260px;
  position: relative;
}

.wb-scroll-track {
  animation: wb-scroll-up 30s linear infinite;
}

@keyframes wb-scroll-up {
  0% { transform: translateY(0); }
  100% { transform: translateY(-50%); }
}

.wb-complaint-item {
  padding: 10px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  font-size: 0.85rem;
}

.wb-complaint-time {
  color: var(--wb-gold);
  font-size: 0.75rem;
  margin-right: 8px;
}

.wb-complaint-tag {
  background: var(--wb-red);
  color: var(--wb-white);
  font-size: 0.7rem;
  padding: 1px 6px;
  margin-right: 6px;
}

/* ============================================================
   数据大盘
   ============================================================ */
.wb-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.wb-stat-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(200,169,81,0.3);
  padding: 20px;
  text-align: center;
}

.wb-stat-number {
  font-family: var(--wb-font-title);
  font-size: 2rem;
  color: var(--wb-gold);
  font-weight: 700;
  line-height: 1.2;
}

.wb-stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
  margin-top: 6px;
}

.wb-stat-bar {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.1);
  margin-top: 10px;
  overflow: hidden;
}

.wb-stat-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--wb-red), var(--wb-gold));
  transition: width 1s ease;
}

/* ============================================================
   法律专家团
   ============================================================ */
.wb-expert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.wb-expert-card {
  background: var(--wb-white);
  box-shadow: var(--wb-shadow);
  overflow: hidden;
  text-align: center;
  padding-bottom: 20px;
}

.wb-expert-photo {
  width: 100%;
  height: 240px;
  object-fit: cover;
  object-position: top;
}

.wb-expert-card h3 {
  font-size: 1.05rem;
  margin: 14px 0 4px;
}

.wb-expert-title {
  font-size: 0.8rem;
  color: var(--wb-red);
  font-weight: 700;
}

.wb-expert-desc {
  font-size: 0.82rem;
  color: #555;
  padding: 0 16px;
  margin-top: 8px;
}

/* ============================================================
   在线投诉入口CTA
   ============================================================ */
.wb-cta-card {
  background: linear-gradient(135deg, var(--wb-red-dark), var(--wb-red));
  padding: 40px 20px;
  text-align: center;
  color: var(--wb-white);
}

.wb-cta-card h2 { color: var(--wb-white); margin-bottom: 12px; }

.wb-cta-card p {
  color: rgba(255,255,255,0.85);
  margin-bottom: 20px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.wb-btn-cta {
  display: inline-block;
  background: var(--wb-gold);
  color: var(--wb-black);
  padding: 14px 40px;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all var(--wb-transition);
  text-decoration: none;
}

.wb-btn-cta:hover {
  background: var(--wb-white);
  color: var(--wb-red);
}

/* ============================================================
   页脚
   ============================================================ */
#wb-footer {
  background: var(--wb-black);
  color: rgba(255,255,255,0.7);
  padding: 40px 0 0;
}

.wb-footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.wb-footer-col h4 {
  color: var(--wb-white);
  font-size: 1rem;
  margin-bottom: 14px;
  font-family: var(--wb-font-title);
}

.wb-footer-col p {
  font-size: 0.82rem;
  line-height: 1.7;
  margin-bottom: 8px;
}

.wb-footer-links {
  list-style: none;
}

.wb-footer-links li {
  margin-bottom: 8px;
}

.wb-footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.82rem;
  transition: color var(--wb-transition);
}

.wb-footer-links a:hover { color: var(--wb-gold); }

/* 荣誉标识区 */
#wb-honors {
  padding: 24px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.wb-honors-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.wb-honor-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.65);
}

.wb-honor-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* 底部授权号 */
#wb-copyright {
  padding: 16px 0;
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
}

#wb-copyright a { color: rgba(255,255,255,0.5); }

.wb-auth-number {
  display: block;
  margin-top: 6px;
  color: var(--wb-gold);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 1px;
}

/* ============================================================
   面包屑导航
   ============================================================ */
.wb-breadcrumb {
  padding: 12px 0;
  font-size: 0.8rem;
  color: var(--wb-gray-dark);
}

.wb-breadcrumb a { color: var(--wb-red); }
.wb-breadcrumb span { margin: 0 6px; color: #999; }

/* ============================================================
   内页通用
   ============================================================ */
.wb-page-hero {
  background: linear-gradient(135deg, var(--wb-black) 0%, var(--wb-red-dark) 100%);
  padding: 40px 20px;
  text-align: center;
  color: var(--wb-white);
}

.wb-page-hero h1 {
  font-size: 1.6rem;
  color: var(--wb-white);
  margin-bottom: 10px;
}

.wb-page-hero p {
  color: rgba(255,255,255,0.8);
  max-width: 600px;
  margin: 0 auto;
  font-size: 0.9rem;
}

.wb-article-body {
  padding: 30px 0;
  font-size: 0.95rem;
  line-height: 1.9;
}

.wb-article-body h2 {
  font-size: 1.3rem;
  margin: 28px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--wb-red);
}

.wb-article-body h3 {
  font-size: 1.1rem;
  margin: 22px 0 10px;
  color: var(--wb-red-dark);
}

.wb-article-body p {
  margin-bottom: 16px;
  text-indent: 2em;
}

.wb-article-body blockquote {
  border-left: 4px solid var(--wb-red);
  background: #FDF5F5;
  padding: 16px 20px;
  margin: 20px 0;
  font-style: italic;
  color: #444;
}

.wb-article-img {
  margin: 20px 0;
  text-align: center;
}

.wb-article-img img {
  max-width: 100%;
  box-shadow: var(--wb-shadow);
}

.wb-internal-links {
  background: #F9F5F0;
  border: 1px solid var(--wb-gray);
  padding: 16px 20px;
  margin: 24px 0;
}

.wb-internal-links h4 {
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--wb-red-dark);
}

.wb-internal-links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.wb-internal-links li a {
  display: inline-block;
  padding: 4px 12px;
  background: var(--wb-white);
  border: 1px solid var(--wb-gray);
  font-size: 0.8rem;
  color: var(--wb-red);
}

/* ============================================================
   投诉表单
   ============================================================ */
#wb-complaint-form {
  max-width: 700px;
  margin: 0 auto;
}

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

.wb-form-group label {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--wb-black);
}

.wb-form-group label .wb-required {
  color: var(--wb-red);
  margin-left: 2px;
}

.wb-form-input,
.wb-form-select,
.wb-form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid #ccc;
  font-size: 0.9rem;
  font-family: var(--wb-font-body);
  transition: border-color var(--wb-transition);
  background: var(--wb-white);
}

.wb-form-input:focus,
.wb-form-select:focus,
.wb-form-textarea:focus {
  border-color: var(--wb-red);
  outline: none;
}

.wb-form-textarea {
  min-height: 150px;
  resize: vertical;
}

.wb-file-upload {
  border: 2px dashed #ccc;
  padding: 30px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--wb-transition);
}

.wb-file-upload:hover { border-color: var(--wb-red); }

.wb-file-upload-icon {
  font-size: 2rem;
  color: var(--wb-gray-dark);
  margin-bottom: 8px;
}

.wb-btn-submit {
  display: block;
  width: 100%;
  background: var(--wb-red);
  color: var(--wb-white);
  padding: 14px;
  font-size: 1.05rem;
  font-weight: 700;
  border: 2px solid var(--wb-gold);
  cursor: pointer;
  transition: all var(--wb-transition);
}

.wb-btn-submit:hover {
  background: var(--wb-gold);
  color: var(--wb-black);
}

/* 提交进度条 */
#wb-submit-progress {
  display: none;
  margin-top: 20px;
}

.wb-progress-bar {
  width: 100%;
  height: 8px;
  background: var(--wb-gray);
  overflow: hidden;
}

.wb-progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--wb-red), var(--wb-gold));
  transition: width 0.3s ease;
}

.wb-progress-text {
  text-align: center;
  font-size: 0.85rem;
  margin-top: 8px;
  color: var(--wb-gray-dark);
}

/* 成功弹窗 */
#wb-success-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

#wb-success-modal.wb-modal-show { display: flex; }

.wb-modal-content {
  background: var(--wb-white);
  padding: 40px;
  max-width: 480px;
  width: 90%;
  text-align: center;
  box-shadow: var(--wb-shadow-heavy);
}

.wb-modal-content h3 {
  color: #006600;
  margin-bottom: 12px;
}

.wb-modal-case-id {
  font-family: var(--wb-font-title);
  font-size: 1.2rem;
  color: var(--wb-red);
  font-weight: 700;
  margin: 12px 0;
  letter-spacing: 1px;
}

.wb-modal-close {
  margin-top: 20px;
  background: var(--wb-red);
  color: var(--wb-white);
  border: none;
  padding: 10px 30px;
  cursor: pointer;
  font-size: 0.9rem;
}

/* ============================================================
   APP下载页
   ============================================================ */
.wb-app-hero {
  background: linear-gradient(135deg, var(--wb-black), var(--wb-red-dark));
  padding: 60px 20px;
  text-align: center;
  color: var(--wb-white);
}

.wb-app-mockup {
  max-width: 260px;
  margin: 0 auto 24px;
  box-shadow: var(--wb-shadow-heavy);
}

.wb-download-btns {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  margin-top: 24px;
}

.wb-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--wb-white);
  color: var(--wb-black);
  padding: 14px 32px;
  font-weight: 700;
  font-size: 0.95rem;
  min-width: 220px;
  justify-content: center;
  transition: all var(--wb-transition);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.wb-download-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: wb-scan 2.5s infinite;
}

@keyframes wb-scan {
  0% { left: -100%; }
  100% { left: 200%; }
}

.wb-download-btn:hover {
  background: var(--wb-gold);
  color: var(--wb-black);
}

.wb-app-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 40px 0;
}

.wb-app-feature {
  text-align: center;
  padding: 20px;
  background: var(--wb-white);
  box-shadow: var(--wb-shadow);
}

.wb-app-feature-icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.wb-app-feature h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

/* ============================================================
   FAQ 折叠
   ============================================================ */
.wb-faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.wb-faq-item {
  border-bottom: 1px solid var(--wb-gray);
  padding: 14px 0;
}

.wb-faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.95rem;
}

.wb-faq-question::after {
  content: '+';
  font-size: 1.2rem;
  color: var(--wb-red);
  transition: transform var(--wb-transition);
}

.wb-faq-item.wb-faq-open .wb-faq-question::after {
  content: '-';
}

.wb-faq-answer {
  display: none;
  padding: 10px 0 4px;
  font-size: 0.88rem;
  color: #555;
  line-height: 1.7;
}

.wb-faq-item.wb-faq-open .wb-faq-answer { display: block; }

/* ============================================================
   响应式断点 (Mobile-First)
   ============================================================ */

/* 768px 平板 */
@media (min-width: 768px) {
  .wb-container { padding: 0 24px; }

  #wb-hamburger { display: none; }

  #wb-main-nav {
    display: flex;
    width: auto;
    flex-direction: row;
    padding: 0;
    background: transparent;
  }

  .wb-nav-link {
    border-bottom: none;
    padding: 8px 12px;
    font-size: 0.85rem;
  }

  #wb-nav-right { display: flex; }

  .wb-hero-content h2 { font-size: 2rem; }

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

  .wb-knowledge-item { flex-direction: row; }
  .wb-knowledge-img { width: 240px; height: auto; min-height: 160px; }

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

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

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

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

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

  .wb-download-btns { flex-direction: row; justify-content: center; }

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

/* 1024px 桌面 */
@media (min-width: 1024px) {
  .wb-hero-slide { min-height: 65vh; }
  .wb-hero-content h2 { font-size: 2.4rem; }

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

  .wb-section { padding: 60px 0; }

  .wb-section-header h2 { font-size: 1.8rem; }

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

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

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

/* 1440px 大屏 */
@media (min-width: 1440px) {
  .wb-container { max-width: 1320px; }
  .wb-hero-slide { min-height: 70vh; }
  .wb-hero-content h2 { font-size: 2.8rem; }
}

/* ============================================================
   辅助工具类
   ============================================================ */
.wb-text-center { text-align: center; }
.wb-text-red { color: var(--wb-red); }
.wb-text-gold { color: var(--wb-gold); }
.wb-mt-20 { margin-top: 20px; }
.wb-mb-20 { margin-bottom: 20px; }
.wb-hidden { display: none; }