/* 基础样式重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #1e40af;
  --primary-hover: #1e3a8a;
  --primary-light: #dbeafe;
  --secondary: #3b82f6;
  --background: #ffffff;
  --foreground: #1f2937;
  --muted: #6b7280;
  --muted-light: #9ca3af;
  --border: #e5e7eb;
  --border-light: #f3f4f6;
  --card-bg: #ffffff;
  --section-bg: #f8fafc;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--foreground);
  background-color: var(--section-bg);
}

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

ul {
  list-style: none;
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

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

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

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

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

.btn-primary-sm {
  background-color: var(--primary);
  color: white;
  padding: 6px 16px;
  font-size: 13px;
  border-radius: 4px;
}

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

.btn-outline-sm {
  background-color: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  padding: 5px 15px;
  font-size: 13px;
  border-radius: 4px;
}

.btn-outline-sm:hover {
  background-color: var(--primary-light);
}

/* ==================== 顶部工具栏 ==================== */
.top-bar {
  background: #333;
  color: #fff;
  font-size: 13px;
}

.top-bar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.top-bar-icon {
  color: #999;
}

.top-bar-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #ccc;
}

.top-bar-item svg {
  color: #999;
}

.top-bar-email {
  padding-left: 20px;
  border-left: 1px solid #555;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.top-bar-link {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #ccc;
  transition: color 0.2s;
}

.top-bar-link:hover {
  color: #fff;
}

.top-bar-link svg {
  color: #e85a3c;
}

/* ==================== 头部导航 ==================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.header-content {
  display: flex;
  align-items: center;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  margin-right: 60px;
}

.logo-img {
  height: 60px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  flex: 1;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 15px;
  color: #333;
  transition: color 0.2s;
  position: relative;
}

.nav-link:hover {
  color: #e85a3c;
}

.nav-link.active {
  color: #e85a3c;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: #e85a3c;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: #333;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 106px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid #e0e0e0;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  z-index: 99;
}

.mobile-menu.active {
  display: block;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  padding: 16px;
}

.mobile-nav-link {
  padding: 12px 0;
  font-size: 15px;
  color: #333;
  border-bottom: 1px solid #f0f0f0;
}

.mobile-nav-link.active {
  color: #e85a3c;
}

/* ==================== 焦点图轮播 ==================== */
.hero-slider {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #f0f0f0;
}

.slider-container {
  width: 100%;
  overflow: hidden;
}

.slider-track {
  display: flex;
  transition: transform 0.5s ease;
}

.slide {
  flex-shrink: 0;
  width: 100%;
}

.slide-img {
  width: 100%;
  height: auto;
  display: block;
  min-height: 300px;
  max-height: 500px;
  object-fit: cover;
}

/* 轮播箭头 */
.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border: 2px solid #e85a3c;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  color: #e85a3c;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  z-index: 10;
}

.slider-arrow:hover {
  background: #e85a3c;
  color: #fff;
}

.slider-prev {
  left: 30px;
}

.slider-next {
  right: 30px;
}

/* 轮播指示器 */
.slider-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.slider-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid #e85a3c;
  background: transparent;
  cursor: pointer;
  transition: all 0.3s;
}

.slider-dot.active {
  background: #e85a3c;
}

.slider-dot:hover {
  background: rgba(232, 90, 60, 0.5);
}

/* ==================== 招标公告模块 ==================== */
.bid-section {
  padding: 30px 0 40px;
  background: #fff;
}

.bid-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 30px;
}

.bid-title-area {
  display: flex;
  flex-direction: column;
}

.bid-subtitle-line {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.bid-line {
  width: 30px;
  height: 2px;
  background: #e85a3c;
}

.bid-subtitle-text {
  font-size: 14px;
  color: #e85a3c;
}

.bid-main-title {
  font-size: 32px;
  font-weight: 600;
  color: #333;
}

.bid-search {
  display: flex;
  align-items: center;
}

.bid-search-input {
  width: 280px;
  height: 40px;
  border: 1px solid #ddd;
  border-right: none;
  border-radius: 4px 0 0 4px;
  padding: 0 16px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.bid-search-input:focus {
  border-color: #e85a3c;
}

.bid-search-input::placeholder {
  color: #999;
}

.bid-search-btn {
  width: 50px;
  height: 40px;
  background: #e85a3c;
  border: none;
  border-radius: 0 4px 4px 0;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.bid-search-btn:hover {
  background: #d04a2c;
}

.bid-card {
  background: #fff;
  border-radius: 8px;
  padding: 20px 24px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.bid-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.bid-tabs {
  display: flex;
  gap: 24px;
}

.bid-tab {
  padding: 8px 0;
  font-size: 15px;
  color: #666;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.2s;
  position: relative;
}

.bid-tab:hover {
  color: #e85a3c;
}

.bid-tab.active {
  color: #e85a3c;
  font-weight: 500;
}

.bid-more {
  font-size: 14px;
  color: #e85a3c;
}

.bid-more span {
  font-weight: bold;
}

.bid-divider {
  height: 2px;
  background: #e85a3c;
  margin-bottom: 16px;
}

.bid-list {
  display: flex;
  flex-direction: column;
}

.bid-item {
  border-bottom: 1px solid #f0f0f0;
}

.bid-item:last-child {
  border-bottom: none;
}

.bid-link {
  display: flex;
  align-items: center;
  padding: 14px 0;
  transition: background 0.2s;
}

.bid-link:hover {
  background: #fafafa;
}

.bid-link:hover .bid-text {
  color: #e85a3c;
}

.bid-region {
  color: #e85a3c;
  font-size: 14px;
  flex-shrink: 0;
}

.bid-text {
  flex: 1;
  font-size: 14px;
  color: #333;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 20px 0 4px;
  transition: color 0.2s;
}

.bid-new {
  display: inline-block;
  background: #e85a3c;
  color: #fff;
  font-size: 12px;
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 8px;
  flex-shrink: 0;
}

.bid-date {
  font-size: 14px;
  color: #999;
  flex-shrink: 0;
}

/* ==================== 其它采购模块 ==================== */
.purchase-section {
  padding: 40px 0;
  background: #f8f8f8;
}

.purchase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}

.purchase-main-title {
  font-size: 32px;
  font-weight: 600;
  color: #333;
}

.purchase-search {
  display: flex;
  align-items: center;
}

.purchase-search-input {
  width: 280px;
  height: 40px;
  border: 1px solid #ddd;
  border-right: none;
  border-radius: 4px 0 0 4px;
  padding: 0 16px;
  font-size: 14px;
  outline: none;
  background: #fff;
  transition: border-color 0.2s;
}

.purchase-search-input:focus {
  border-color: #e85a3c;
}

.purchase-search-input::placeholder {
  color: #999;
}

.purchase-search-btn {
  width: 50px;
  height: 40px;
  background: #e85a3c;
  border: none;
  border-radius: 0 4px 4px 0;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.purchase-search-btn:hover {
  background: #d04a2c;
}

.purchase-card {
  background: #fff;
  border-radius: 8px;
  padding: 20px 24px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.purchase-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.purchase-tabs {
  display: flex;
  gap: 24px;
}

.purchase-tab {
  padding: 8px 0;
  font-size: 15px;
  color: #666;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.2s;
}

.purchase-tab:hover {
  color: #e85a3c;
}

.purchase-tab.active {
  color: #e85a3c;
  font-weight: 500;
}

.purchase-more {
  font-size: 14px;
  color: #e85a3c;
}

.purchase-more span {
  font-weight: bold;
}

.purchase-divider {
  height: 2px;
  background: #e85a3c;
  margin-bottom: 16px;
}

.purchase-list {
  display: flex;
  flex-direction: column;
}

.purchase-item {
  border-bottom: 1px solid #f0f0f0;
}

.purchase-item:last-child {
  border-bottom: none;
}

.purchase-link {
  display: flex;
  align-items: center;
  padding: 14px 0;
  transition: background 0.2s;
}

.purchase-link:hover {
  background: #fafafa;
}

.purchase-link:hover .purchase-text {
  color: #e85a3c;
}

.purchase-region {
  color: #e85a3c;
  font-size: 14px;
  flex-shrink: 0;
}

.purchase-text {
  flex: 1;
  font-size: 14px;
  color: #333;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 20px 0 4px;
  transition: color 0.2s;
}

.purchase-date {
  font-size: 14px;
  color: #999;
  flex-shrink: 0;
}

/* ==================== 统计数据 ==================== */
.stats {
  padding: 0;
  margin-top: -60px;
  position: relative;
  z-index: 10;
}

.stats-card {
  background: #fff;
  border-radius: 20px;
  padding: 40px 60px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.stats-grid {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.stat-item {
  text-align: center;
}

.stat-icon {
  margin-bottom: 12px;
  color: #e85a3c;
}

.stat-icon svg {
  stroke: #e85a3c;
}

.stat-number {
  font-size: 42px;
  font-weight: 400;
  color: #333;
  line-height: 1.2;
}

.stat-plus {
  font-size: 32px;
}

.stat-label {
  font-size: 14px;
  color: #999;
  margin-top: 8px;
}

/* ==================== 下载工具模块 ==================== */
.download-section {
  padding: 60px 0 80px;
  background: #f0f0f0;
  position: relative;
}

.download-wave {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 60" preserveAspectRatio="none"><path fill="%23ffffff" d="M0,0 L0,40 Q360,60 720,40 T1440,40 L1440,0 Z"/></svg>') no-repeat center top;
  background-size: 100% 100%;
}

.download-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
}

.download-line {
  width: 40px;
  height: 2px;
  background: #e85a3c;
}

.download-subtitle {
  font-size: 14px;
  color: #e85a3c;
}

.download-title {
  font-size: 32px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 50px;
  color: #333;
}

.download-cards {
  display: flex;
  gap: 30px;
  justify-content: center;
}

.download-card {
  background: #fff;
  border-radius: 8px;
  padding: 60px 30px 30px;
  width: 320px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  position: relative;
  text-align: center;
}

.download-icon-wrapper {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
}

.download-icon {
  width: 60px;
  height: 60px;
  background: #e85a3c;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px rgba(232, 90, 60, 0.3);
}

.download-card-title {
  font-size: 18px;
  font-weight: 600;
  color: #333;
  margin-bottom: 24px;
}

.download-list {
  text-align: left;
}

.download-list li {
  border-bottom: 1px dashed #e0e0e0;
}

.download-list li:last-child {
  border-bottom: none;
}

.download-list li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  color: #666;
  font-size: 14px;
  transition: color 0.2s;
}

.download-list li a:hover {
  color: #e85a3c;
}

.download-list li a:hover .download-btn {
  color: #e85a3c;
}

.download-text {
  flex: 1;
}

.download-btn {
  color: #e85a3c;
  flex-shrink: 0;
}

.download-more {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  color: #e85a3c;
  transition: opacity 0.2s;
}

.download-more:hover {
  opacity: 0.8;
}

.download-more span {
  font-weight: bold;
}

/* 用户问答列表 */
.qa-list {
  text-align: left;
}

.qa-item {
  padding: 10px 0;
  border-bottom: 1px dashed #e0e0e0;
}

.qa-item:last-child {
  border-bottom: none;
}

.qa-question {
  font-size: 14px;
  color: #333;
  margin-bottom: 4px;
}

.qa-answer {
  font-size: 13px;
  color: #999;
  padding-left: 24px;
}

/* 操作流程列表 */
.flow-list {
  text-align: center;
}

.flow-list li {
  padding: 12px 0;
}

.flow-list li a {
  font-size: 14px;
  color: #666;
  transition: color 0.2s;
}

.flow-list li a:hover {
  color: #e85a3c;
}

/* ==================== 使用规则 ==================== */
.rules {
  padding: 80px 0 60px;
  background: #f5f5f5;
  position: relative;
  overflow: hidden;
}

.rules-bg {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 40%;
  background: linear-gradient(to left, rgba(200, 200, 200, 0.3), transparent);
  pointer-events: none;
}

.rules-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
}

.rules-line {
  width: 40px;
  height: 2px;
  background: #e85a3c;
}

.rules-subtitle {
  font-size: 14px;
  color: #e85a3c;
}

.rules-title {
  font-size: 32px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 50px;
  color: #333;
}

.rules-grid {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 20px;
  position: relative;
}

.rule-item {
  text-align: center;
  width: 200px;
  flex-shrink: 0;
}

.rule-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto 20px;
  overflow: hidden;
  border: 4px solid #e0e0e0;
  background: #f9f9f9;
}

.rule-circle-target {
  border-color: #e85a3c;
  box-shadow: 0 0 0 4px rgba(232, 90, 60, 0.2);
}

.rule-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.rule-title-text {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: #333;
}

.rule-desc {
  font-size: 13px;
  color: #666;
  line-height: 1.7;
  padding: 0 10px;
}

.rule-arrow {
  flex-shrink: 0;
  margin-top: 45px;
}

/* ==================== 合作伙伴 ==================== */
.partners {
  padding: 60px 0;
  background: #fff;
}

.partners-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
}

.partners-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.partners-line {
  width: 40px;
  height: 3px;
  background: #e85a3c;
  margin-bottom: 12px;
}

.partners-subtitle {
  font-size: 14px;
  color: #e85a3c;
  margin-bottom: 8px;
}

.partners-title {
  font-size: 32px;
  font-weight: 600;
  color: #333;
}

.partners-nav {
  display: flex;
  gap: 12px;
}

.partners-nav-btn {
  width: 48px;
  height: 48px;
  border: 2px solid #e85a3c;
  border-radius: 50%;
  background: transparent;
  color: #e85a3c;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.partners-nav-btn:hover {
  background: #e85a3c;
  color: #fff;
}

.partners-slider {
  overflow: hidden;
  position: relative;
}

.partners-track {
  display: flex;
  gap: 24px;
  transition: transform 0.5s ease;
}

.partner-card {
  flex-shrink: 0;
  width: calc(25% - 18px);
  height: 140px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: box-shadow 0.3s;
}

.partner-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.partner-img {
  max-width: 100%;
  max-height: 80px;
  object-fit: contain;
}

/* ==================== 政策法规 ==================== */
.policies {
  padding: 40px 0 60px;
  background: #f5f5f5;
}

.policies-title {
  font-size: 28px;
  font-weight: 700;
  color: #333;
  margin-bottom: 30px;
  padding-left: 20px;
}

.policies-list {
  background: transparent;
}

.policy-item {
  border-bottom: 1px solid #e0e0e0;
}

.policy-item:first-child {
  border-top: 1px solid #e0e0e0;
}

.policy-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  transition: background 0.2s;
}

.policy-link:hover {
  background: rgba(0, 0, 0, 0.02);
}

.policy-link:hover .policy-text {
  color: var(--primary);
}

.policy-text {
  flex: 1;
  font-size: 15px;
  color: #333;
  transition: color 0.2s;
  padding-right: 40px;
}

.policy-date {
  font-size: 14px;
  color: #999;
  flex-shrink: 0;
  white-space: nowrap;
}

/* ==================== 专家招募浮窗 ==================== */
.expert-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 90;
}

.expert-banner.hidden {
  display: none;
}

.expert-banner p {
  font-size: 14px;
}

.expert-close {
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity 0.2s;
  padding: 4px;
}

.expert-close:hover {
  opacity: 1;
}

/* ==================== 页脚 ==================== */
.footer {
  margin-top: 40px;
}

.footer-main {
  background: 
    linear-gradient(rgba(42, 4, 113, 0.9), rgba(42, 4, 113, 0.9)), /* 遮罩层 */
    url(../images/footer-bg-2.jpg); /* 背景图 */
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 50px 0 40px;
  overflow: hidden;
  z-index: 1;
}

.footer-main::before {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 50%;
  background-size: cover;
  opacity: 0.6;
  pointer-events: none;
}

.footer-grid {
  display: flex;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.footer-section {
  color: #fff;
}

.footer-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 24px;
  color: #fff;
}

/* 联系我们 */
.footer-contact {
  min-width: 280px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.contact-icon {
  width: 36px;
  height: 36px;
  background: #e85a3c;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
}

.contact-text {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 36px;
}

.contact-text .contact-label {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.2;
}

.contact-text .contact-phone {
  display: block;
  font-size: 16px;
  font-weight: 500;
  color: #fff;
  line-height: 1.4;
}

/* 服务链接 */
.footer-links {
  flex: 1;
}

.links-columns {
  display: flex;
  gap: 30px;
}

.link-column {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.link-column li a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  transition: color 0.2s;
  white-space: nowrap;
}

.link-column li a:hover {
  color: #fff;
}

/* 快速联系 */
.footer-qrcode {
  min-width: 150px;
}

.qrcode-box {
  background: #fff;
  padding: 8px;
  border-radius: 4px;
  display: inline-block;
}
.qrcode-box img { width:80px;}

.qrcode-placeholder {
  display: block;
}

/* 底部版权栏 */
.footer-bottom {
  background: #152a42;
  padding: 16px 0;
}

.copyright {
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.beian-icon {
  display: inline-block;
  width: 14px;
  height: 14px;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><circle cx="8" cy="8" r="7" fill="%23d4a03c"/><circle cx="8" cy="8" r="4" fill="%23b8860b"/></svg>') no-repeat center;
  background-size: contain;
  vertical-align: middle;
  margin-right: 4px;
}

/* 回到顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: #e85a3c;
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(232, 90, 60, 0.4);
  transition: all 0.3s;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: #d04a2c;
  transform: translateY(-2px);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
  .top-bar-left {
    gap: 12px;
  }
  
  .top-bar-email {
    display: none;
  }
  
  .nav {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
    margin-left: auto;
  }
  
  .bid-header,
  .purchase-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
  
  .bid-search,
  .purchase-search {
    width: 100%;
  }
  
  .bid-search-input,
  .purchase-search-input {
    flex: 1;
  }
  
  .bid-tabs,
  .purchase-tabs {
    flex-wrap: wrap;
    gap: 12px;
  }
  
  .stats-grid {
    gap: 40px;
  }
  
  .stats-card {
    padding: 30px 40px;
  }
  
  .download-cards {
    flex-wrap: wrap;
  }
  
  .download-card {
    width: calc(50% - 15px);
  }
  
  .rules-grid {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .rule-arrow {
    display: none;
  }
  
  .rule-item {
    width: calc(50% - 20px);
    margin-bottom: 30px;
  }
  
  .partner-card {
    width: calc(33.333% - 16px);
  }
  
  .partners-title {
    font-size: 28px;
  }

  .footer-grid {
    flex-wrap: wrap;
  }

  .footer-contact {
    width: 100%;
    margin-bottom: 20px;
  }

  .footer-links {
    width: 100%;
  }

  .footer-qrcode {
    width: 100%;
    margin-top: 20px;
  }
}

@media (max-width: 768px) {
  .top-bar {
    display: none;
  }
  
  .mobile-menu {
    top: 70px;
  }
  
  .header-content {
    height: 60px;
  }
  
  .logo-img {
    height: 30px;
  }
  
  .slider-arrow {
    width: 36px;
    height: 36px;
  }
  
  .slider-prev {
    left: 10px;
  }
  
  .slider-next {
    right: 10px;
  }
  
  .slide-img {
    min-height: 200px;
  }
  
  .bid-main-title,
  .purchase-main-title {
    font-size: 26px;
  }
  
  .bid-card,
  .purchase-card {
    padding: 16px;
  }
  
  .bid-date,
  .purchase-date {
    display: none;
  }
  
  .bid-text,
  .purchase-text {
    padding-right: 0;
  }
  
  .banner-subtitle {
    font-size: 20px;
  }
  
  .stats-grid {
    flex-direction: column;
    gap: 24px;
  }
  
  .stat-number {
    font-size: 36px;
  }
  
  .stats-grid {
    flex-direction: column;
    gap: 30px;
  }
  
  .stat-number {
    font-size: 36px;
  }
  
  .rules-title {
    font-size: 26px;
  }
  
  .rule-circle {
    width: 100px;
    height: 100px;
  }
  
  .rule-item {
    width: calc(50% - 10px);
  }
  
  .download-card {
    width: 100%;
    max-width: 400px;
  }
  
  .download-title {
    font-size: 26px;
  }
  
  .partner-card {
    width: calc(50% - 12px);
    height: 120px;
  }
  
  .partners-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
  
  .partners-nav-btn {
    width: 40px;
    height: 40px;
  }
  
  .policies-title {
    font-size: 24px;
    padding-left: 16px;
  }

  .policy-link {
    padding: 14px 16px;
  }

  .policy-text {
    font-size: 14px;
  }

  .links-columns {
    flex-wrap: wrap;
    gap: 20px;
  }

  .link-column {
    width: calc(50% - 10px);
  }

  .link-column:last-child {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .card-tabs {
    flex-wrap: wrap;
    gap: 6px;
  }
  
  .tab-btn {
    padding: 5px 10px;
    font-size: 12px;
  }
  
  .item-date {
    display: none;
  }

  .policy-link {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .policy-text {
    padding-right: 0;
  }

  .policy-date {
    font-size: 12px;
  }
  
  .rule-item {
    width: 100%;
  }
  
  .rule-circle {
    width: 90px;
    height: 90px;
  }
  
  .stats-card {
    padding: 24px 20px;
    border-radius: 12px;
  }
  
  .partner-card {
    width: calc(50% - 12px);
    height: 100px;
  }
  
  .partners-title {
    font-size: 24px;
  }

  .link-column {
    width: 100%;
  }

  .links-columns {
    flex-direction: column;
    gap: 15px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
}
/* 页面横幅 - 继承download.css样式 */
.page-banner {
  background: linear-gradient(135deg, #2c3e50 0%, #3d5a80 50%, #4a6fa5 100%);
  padding: 60px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner .banner-decoration {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 200"><path d="M0,100 L100,80 L200,120 L300,60 L400,140 L500,80 L600,100 L700,60 L800,120 L800,200 L0,200 Z" fill="rgba(255,255,255,0.03)"/><path d="M600,0 L700,40 L800,0 L800,80 L700,120 L600,80 Z" fill="rgba(255,255,255,0.05)"/><path d="M650,150 L750,110 L800,150 L800,200 L650,200 Z" fill="rgba(255,255,255,0.03)"/></svg>') no-repeat center;
  background-size: cover;
  pointer-events: none;
}

.page-banner .banner-title {
  font-size: 36px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.page-banner .banner-subtitle {
  font-size: 14px;
  color: #e85a3c;
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  .page-banner {
    padding: 40px 0;
  }
  
  .page-banner .banner-title {
    font-size: 28px;
  }
}