/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --bg: #F2F6FB;
  --surface: #FFFFFF;
  --primary: #1E5E8E;
  --primary-hover: #174A70;
  --secondary: #3A8BA8;
  --accent: #D9A13B;
  --text: #1A2B3C;
  --text-muted: #5C7285;
  --line: #DCE5EE;
  --shadow-card: 0 6px 20px rgba(30, 70, 110, 0.08);
  --shadow-hover: 0 12px 30px rgba(30, 70, 110, 0.14);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul, ol {
  list-style: none;
}

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

input, select, textarea {
  font-family: inherit;
  font-size: 14px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 2px solid transparent;
  transition: all 0.3s ease;
  line-height: 1.4;
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(30, 94, 142, 0.25);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: none;
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(30, 94, 142, 0.3);
  outline-offset: 2px;
}

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

.btn-light:hover {
  background: var(--bg);
  border-color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  transform: translateY(-2px);
}

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

.btn-outline-primary:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(30, 94, 142, 0.2);
}

/* ===== 顶部导航面板 ===== */
.header-nav {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  margin: 20px auto 0;
  max-width: 1200px;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
}

.logo-text span {
  color: var(--primary);
}

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

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 110px;
  height: 48px;
  padding: 0 16px;
  background: #EDF2F7;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  border: 2px solid transparent;
  transition: all 0.3s ease;
  justify-content: center;
}

.nav-link i {
  font-size: 15px;
  color: var(--secondary);
  transition: color 0.3s ease;
}

.nav-link:hover {
  background: var(--surface);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-card);
}

.nav-link:hover i {
  color: var(--primary);
}

.nav-link.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.nav-link.active i {
  color: #fff;
}

.nav-cta {
  flex-shrink: 0;
}

.nav-cta .btn {
  white-space: nowrap;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: #EDF2F7;
  border-radius: var(--radius-sm);
  padding: 12px;
  width: 44px;
  height: 44px;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: background 0.3s ease;
}

.hamburger span {
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  background: linear-gradient(rgba(10, 28, 45, 0.78), rgba(10, 28, 45, 0.58)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  margin: 40px auto 0;
  border-radius: var(--radius-lg);
  max-width: 1200px;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 60px 48px;
  width: 100%;
}

.hero-content {
  flex: 1;
  padding-right: 20px;
}

.hero-badge {
  display: inline-block;
  background: rgba(58, 139, 168, 0.25);
  color: #E8F4FA;
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-title {
  font-size: 42px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.hero-subtitle {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  flex: 0 0 340px;
  position: relative;
}

.hero-visual img {
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  object-fit: cover;
  height: 300px;
  width: 100%;
}

.hero-card-float {
  position: absolute;
  bottom: -16px;
  left: -20px;
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-hover);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-card-float .float-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
}

.hero-card-float strong {
  display: block;
  font-size: 14px;
  color: var(--text);
  line-height: 1.3;
}

.hero-card-float small {
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== 区块通用 ===== */
.section {
  padding: 80px 0;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 480px;
}

.section-header-left .section-subtitle {
  margin-top: 8px;
}

.section-header-right .section-link {
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.section-header-right .section-link:hover {
  color: var(--primary-hover);
}

/* ===== 指标看板 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid var(--line);
}

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

.stat-icon {
  width: 52px;
  height: 52px;
  background: rgba(58, 139, 168, 0.12);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--secondary);
  font-size: 22px;
}

.stat-number {
  font-family: "DIN Alternate", "Bebas Neue", sans-serif;
  font-size: 44px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.stat-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 服务矩阵 ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.service-card-large {
  grid-column: span 8;
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line);
  overflow: hidden;
  display: flex;
  transition: all 0.3s ease;
}

.service-card-large:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.service-card-large .service-content {
  flex: 1;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.service-card-large .service-img {
  flex: 0 0 200px;
  min-height: 220px;
}

.service-card-large .service-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.service-card-small {
  grid-column: span 4;
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.service-card-small:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.service-icon {
  width: 48px;
  height: 48px;
  background: rgba(30, 94, 142, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 16px;
}

.service-card-large .service-icon {
  margin-bottom: 20px;
}

.service-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
  line-height: 1.4;
}

.service-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  flex: 1;
}

.service-link {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease;
}

.service-link:hover {
  color: var(--primary-hover);
  gap: 10px;
}

.service-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.service-tag {
  background: rgba(58, 139, 168, 0.1);
  color: var(--secondary);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 500;
}

/* ===== 结果对比区 ===== */
.compare-section {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 60px 48px;
  margin: 0 auto;
  max-width: 1200px;
}

.compare-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.compare-left .section-title {
  margin-bottom: 16px;
}

.compare-left p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

.compare-right {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.compare-card {
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all 0.3s ease;
}

.compare-card.dark {
  background: var(--primary);
  color: #fff;
}

.compare-card.light {
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--text);
}

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

.compare-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.compare-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 14px;
  line-height: 1.6;
}

.compare-item:last-child {
  margin-bottom: 0;
}

.compare-item .ic {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  margin-top: 2px;
}

.compare-card.dark .ic {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.compare-card.light .ic {
  background: #fff;
  color: #C0392B;
  border: 1px solid var(--line);
}

.compare-highlight {
  color: var(--accent);
  font-weight: 600;
}

/* ===== 资讯列表 ===== */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line);
  padding: 16px 20px;
  transition: all 0.3s ease;
  cursor: pointer;
}

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

.news-thumb {
  flex-shrink: 0;
  width: 120px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

.news-info {
  flex: 1;
  min-width: 0;
}

.news-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
  transition: color 0.3s ease;
}

.news-card:hover .news-info h3 {
  color: var(--primary);
}

.news-info p {
  font-size: 14px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.news-meta .cat {
  background: rgba(58, 139, 168, 0.1);
  color: var(--secondary);
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 8px;
  font-weight: 500;
}

.news-meta time {
  font-size: 13px;
  color: var(--text-muted);
}

.news-read {
  flex-shrink: 0;
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.3s ease;
}

.news-read:hover {
  color: var(--primary-hover);
  transform: translateX(4px);
}

.news-empty {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 60px 40px;
  text-align: center;
  color: var(--text-muted);
}

.news-empty i {
  font-size: 40px;
  color: var(--line);
  margin-bottom: 16px;
}

.news-empty p {
  font-size: 15px;
}

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

.faq-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.faq-item.active {
  box-shadow: var(--shadow-hover);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  text-align: left;
  gap: 16px;
  cursor: pointer;
  background: transparent;
}

.faq-question .q-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.faq-question .q-icon {
  width: 28px;
  height: 28px;
  background: rgba(58, 139, 168, 0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary);
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.faq-question .q-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.faq-question .q-arrow {
  font-size: 14px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .q-arrow {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  display: none;
  animation: fadeInUp 0.3s ease;
}

.faq-item.active .faq-answer {
  display: block;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.faq-answer-inner {
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 16px;
}

/* ===== 转化表单 ===== */
.contact-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 56px 48px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.contact-left .section-title {
  margin-bottom: 12px;
}

.contact-left-desc {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 24px;
  line-height: 1.8;
}

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

.contact-point {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text);
}

.contact-point i {
  width: 36px;
  height: 36px;
  background: rgba(58, 139, 168, 0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary);
  font-size: 14px;
  flex-shrink: 0;
}

.contact-form {
  background: var(--bg);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--line);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text);
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 94, 142, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-submit {
  width: 100%;
  margin-top: 8px;
}

.form-note {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 12px;
}

/* ===== 页脚 ===== */
.footer {
  background: #0E2233;
  color: #fff;
  margin-top: 80px;
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-logo .logo-icon {
  background: rgba(255, 255, 255, 0.15);
}

.footer-logo .logo-text {
  color: #fff;
}

.footer-logo .logo-text span {
  color: var(--secondary);
}

.footer-col p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.8;
}

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

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

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  transition: color 0.3s ease;
}

.footer-col ul li a:hover {
  color: var(--secondary);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  margin-bottom: 12px;
}

.footer-contact li i {
  margin-top: 4px;
  color: var(--secondary);
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom span {
  margin: 0 8px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-inner {
    padding: 48px 32px;
  }

  .hero-visual {
    flex-basis: 280px;
  }

  .hero-visual img {
    height: 240px;
  }

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

  .service-card-large {
    grid-column: span 12;
  }

  .service-card-small {
    grid-column: span 6;
  }

  .compare-wrap {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    padding: 12px 0;
    gap: 8px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    height: 44px;
  }

  .nav-cta {
    margin-left: auto;
  }

  .hero-inner {
    flex-direction: column;
    padding: 40px 24px;
  }

  .hero-content {
    padding-right: 0;
  }

  .hero-title {
    font-size: 30px;
  }

  .hero-visual {
    flex-basis: auto;
    width: 100%;
  }

  .hero-visual img {
    height: 200px;
  }

  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 24px;
  }

  .service-card-large {
    flex-direction: column;
  }

  .service-card-large .service-img {
    flex-basis: auto;
    min-height: 160px;
  }

  .service-card-large .service-content {
    padding: 24px;
  }

  .compare-section {
    padding: 40px 24px;
  }

  .compare-right {
    grid-template-columns: 1fr;
  }

  .contact-card {
    grid-template-columns: 1fr;
    padding: 32px 24px;
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .news-card {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .news-thumb {
    width: 100%;
    height: 160px;
  }

  .news-info h3 {
    white-space: normal;
  }

  .news-info p {
    white-space: normal;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .header-nav {
    padding: 12px 16px;
    margin-top: 12px;
  }

  .logo-text {
    font-size: 17px;
  }

  .nav-cta .btn {
    padding: 10px 16px;
    font-size: 14px;
  }

  .hero {
    margin-top: 24px;
    min-height: auto;
  }

  .hero-inner {
    padding: 32px 20px;
  }

  .hero-title {
    font-size: 26px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-card {
    padding: 20px 16px;
  }

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

  .services-grid {
    gap: 16px;
  }

  .service-card-small {
    grid-column: span 12;
  }

  .compare-section {
    padding: 32px 20px;
  }

  .news-list {
    gap: 12px;
  }

  .news-card {
    padding: 12px;
  }

  .contact-card {
    padding: 24px 16px;
  }

  .contact-form {
    padding: 20px;
  }
}

/* roulang page: category1 */
:root{
  --bg:#F2F6FB;
  --surface:#FFFFFF;
  --primary:#1E5E8E;
  --primary-hover:#174A70;
  --secondary:#3A8BA8;
  --accent:#D9A13B;
  --text:#1A2B3C;
  --text-muted:#5C7285;
  --line:#DCE5EE;
  --shadow-card:0 6px 20px rgba(30,70,110,0.08);
  --shadow-hover:0 12px 30px rgba(30,70,110,0.14);
  --radius-md:12px;
  --radius-lg:20px;
  --radius-sm:8px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;transition:color .25s ease;}
ul,ol{list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.container-fluid{max-width:1320px;margin:0 auto;padding:0 32px;}

/* ---------- Header Nav ---------- */
.header-nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  background:var(--surface);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  padding:16px 28px;
  margin:20px auto 0;
  position:relative;
  z-index:50;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-icon{
  width:38px;height:38px;
  background:var(--primary);
  color:#fff;
  border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:700;
}
.logo-text{font-size:20px;font-weight:700;color:var(--text);letter-spacing:.5px;}
.logo-text span{color:var(--secondary);}
.nav-links{display:flex;align-items:center;gap:10px;}
.nav-link{
  display:flex;align-items:center;gap:8px;
  background:#EDF2F7;
  border-radius:var(--radius-sm);
  padding:12px 18px;
  font-size:14px;
  color:var(--text);
  border:1px solid transparent;
  transition:all .25s ease;
  white-space:nowrap;
}
.nav-link i{color:var(--secondary);font-size:15px;}
.nav-link:hover{
  background:var(--surface);
  border-color:var(--primary);
  color:var(--primary);
  box-shadow:0 4px 14px rgba(30,94,142,0.10);
  transform:translateY(-2px);
}
.nav-link.active{
  background:var(--primary);
  color:#fff;
  border-color:var(--primary);
}
.nav-link.active i{color:#fff;}
.nav-cta{flex-shrink:0;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-sm);
  padding:12px 24px;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  border:1px solid transparent;
  transition:all .25s ease;
  text-align:center;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
}
.btn-primary:hover{
  background:var(--primary-hover);
  transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(30,94,142,0.25);
}
.btn-primary:active{transform:translateY(0);}
.btn-outline{
  background:transparent;
  color:#fff;
  border-color:rgba(255,255,255,.7);
}
.btn-outline:hover{
  background:rgba(255,255,255,.15);
  border-color:#fff;
  transform:translateY(-2px);
}
.btn-outline-dark{
  background:transparent;
  color:var(--primary);
  border-color:var(--primary);
}
.btn-outline-dark:hover{
  background:var(--primary);
  color:#fff;
  transform:translateY(-2px);
}
.hamburger{
  display:none;
  flex-direction:column;
  gap:5px;
  cursor:pointer;
  background:none;
  border:none;
  padding:8px;
}
.hamburger span{
  width:24px;height:2px;
  background:var(--text);
  border-radius:2px;
  transition:all .3s ease;
}

/* ---------- Page Banner ---------- */
.page-banner{
  background-image:linear-gradient(rgba(10,28,45,.78),rgba(10,28,45,.60)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-radius:var(--radius-lg);
  margin:24px auto 0;
  padding:64px 48px 56px;
  position:relative;
  overflow:hidden;
}
.breadcrumb{
  font-size:13px;
  color:rgba(255,255,255,.75);
  display:flex;align-items:center;gap:8px;
  margin-bottom:16px;
}
.breadcrumb a{color:rgba(255,255,255,.85);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;}
.breadcrumb .sep{opacity:.6;}
.page-banner h1{
  font-size:36px;
  font-weight:700;
  color:#fff;
  margin-bottom:14px;
  letter-spacing:.5px;
  line-height:1.3;
}
.page-banner p{
  color:rgba(255,255,255,.85);
  font-size:16px;
  max-width:560px;
  margin-top:10px;
}

/* ---------- Section General ---------- */
.section{padding:64px 0;}
.section-label{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  color:var(--primary);
  background:rgba(30,94,142,.08);
  border-radius:20px;
  padding:5px 16px;
  margin-bottom:12px;
}
.section-header{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:40px;
}
.section-header h2{
  font-size:30px;
  font-weight:700;
  color:var(--text);
  line-height:1.3;
}
.section-header .sub{
  color:var(--text-muted);
  font-size:14px;
  max-width:480px;
}

/* ---------- Overview ---------- */
.overview-section{padding:56px 0 20px;}
.overview-card{
  background:var(--surface);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:40px;
  padding:48px;
  align-items:center;
  transition:box-shadow .3s ease;
}
.overview-card:hover{box-shadow:var(--shadow-hover);}
.overview-text h2{font-size:28px;font-weight:700;margin-bottom:16px;}
.overview-text p{
  color:var(--text-muted);
  font-size:15px;
  margin-bottom:14px;
  line-height:1.8;
}
.overview-image img{
  border-radius:var(--radius-md);
  width:100%;
  height:260px;
  object-fit:cover;
  box-shadow:var(--shadow-card);
}

/* ---------- Features ---------- */
.features-section{padding:56px 0 20px;}
.features-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.feature-card{
  background:var(--surface);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);
  padding:28px 24px;
  transition:all .3s ease;
  border:1px solid transparent;
}
.feature-card:hover{
  box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
  border-color:var(--line);
}
.feature-icon{
  width:48px;height:48px;
  background:rgba(30,94,142,.10);
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;
  color:var(--primary);
  margin-bottom:18px;
}
.feature-card h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.feature-card p{font-size:13px;color:var(--text-muted);line-height:1.7;}

/* ---------- Process ---------- */
.process-section{
  padding:56px 0 20px;
}
.process-steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.process-step{
  background:var(--surface);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);
  padding:28px 24px;
  position:relative;
  transition:all .3s ease;
}
.process-step:hover{
  box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
}
.step-number{
  font-family:"DIN Alternate","Bebas Neue",sans-serif;
  font-size:36px;
  font-weight:700;
  color:var(--accent);
  line-height:1;
  margin-bottom:14px;
}
.step-line{
  width:28px;height:3px;
  background:var(--secondary);
  border-radius:2px;
  margin-bottom:14px;
}
.process-step h3{font-size:16px;font-weight:600;margin-bottom:6px;}
.process-step p{font-size:13px;color:var(--text-muted);line-height:1.7;}

/* ---------- Content Grid ---------- */
.content-section{
  padding:56px 0 20px;
}
.content-grid{
  display:grid;
  grid-template-columns:2fr 1fr;
  gap:28px;
  align-items:start;
}
.main-content{
  background:var(--surface);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  padding:40px;
}
.main-content h2{
  font-size:24px;
  font-weight:700;
  margin:28px 0 14px;
}
.main-content h2:first-child{margin-top:0;}
.main-content h3{
  font-size:18px;
  font-weight:600;
  margin:24px 0 10px;
}
.main-content p{
  font-size:15px;
  color:var(--text);
  margin-bottom:12px;
  line-height:1.8;
}
.main-content ul{
  margin:12px 0 18px;
}
.main-content ul li{
  position:relative;
  padding-left:24px;
  font-size:15px;
  margin-bottom:8px;
  color:var(--text);
}
.main-content ul li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:7px;height:7px;
  background:var(--secondary);
  border-radius:2px;
}
.content-img{
  border-radius:var(--radius-md);
  width:100%;
  height:220px;
  object-fit:cover;
  margin:16px 0 20px;
  box-shadow:var(--shadow-card);
}

/* Sidebar */
.sidebar{
  display:flex;
  flex-direction:column;
  gap:20px;
}
.sidebar-card{
  background:var(--surface);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);
  padding:24px;
  transition:box-shadow .3s ease;
}
.sidebar-card:hover{box-shadow:var(--shadow-hover);}
.sidebar-card h3{
  font-size:16px;
  font-weight:600;
  margin-bottom:16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
  gap:8px;
}
.sidebar-card h3 i{color:var(--secondary);}
.sidebar-list li{margin-bottom:12px;}
.sidebar-list li a{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--text);
  padding:10px 14px;
  background:var(--bg);
  border-radius:var(--radius-sm);
  transition:all .25s ease;
}
.sidebar-list li a:hover{
  background:rgba(30,94,142,.10);
  color:var(--primary);
  transform:translateX(4px);
}
.sidebar-list li a i{
  color:var(--secondary);
  font-size:13px;
  width:16px;
  text-align:center;
}
.sidebar-contact p{
  font-size:13px;
  color:var(--text-muted);
  margin-bottom:16px;
  line-height:1.7;
}
.sidebar-contact .btn{
  width:100%;
  margin-bottom:10px;
}

/* ---------- Scenario Grid ---------- */
.scenario-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
  margin:16px 0 10px;
}
.scenario-item{
  background:var(--bg);
  border-radius:var(--radius-sm);
  padding:18px 16px;
  border-left:3px solid var(--secondary);
  transition:all .25s ease;
}
.scenario-item:hover{
  background:rgba(30,94,142,.06);
  transform:translateX(4px);
}
.scenario-item i{
  color:var(--secondary);
  margin-right:8px;
  font-size:14px;
}
.scenario-item span{font-size:14px;font-weight:500;}

/* ---------- FAQ ---------- */
.faq-section{
  padding:56px 0 20px;
}
.faq-section .container{
  max-width:900px;
}
.faq-section h2{
  text-align:center;
  font-size:30px;
  font-weight:700;
  margin-bottom:36px;
}
.faq-list{
  display:flex;
  flex-direction:column;
  gap:14px;
}
.faq-item{
  background:var(--surface);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  transition:box-shadow .3s ease;
}
.faq-item:hover{box-shadow:var(--shadow-hover);}
.faq-question{
  width:100%;
  background:none;
  border:none;
  padding:20px 24px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  cursor:pointer;
  display:flex;
  align-items:center;
  gap:14px;
  transition:color .25s ease;
}
.faq-question .icon{
  width:32px;height:32px;
  background:rgba(30,94,142,.10);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;
  color:var(--primary);
  flex-shrink:0;
}
.faq-question .arrow{
  margin-left:auto;
  font-size:14px;
  color:var(--text-muted);
  transition:transform .3s ease;
}
.faq-item.open .faq-question .arrow{
  transform:rotate(180deg);
}
.faq-item.open .faq-question{color:var(--primary);}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
}
.faq-answer-inner{
  padding:0 24px 20px 70px;
  font-size:14px;
  color:var(--text-muted);
  line-height:1.75;
  background:var(--bg);
  margin:0 16px 16px;
  border-radius:var(--radius-sm);
  padding:16px 20px;
}
.faq-answer-inner p:last-child{margin-bottom:0;}

/* ---------- CTA ---------- */
.cta-section{
  padding:56px 0 64px;
}
.cta-card{
  background:var(--surface);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  padding:56px 48px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:4px;
  background:linear-gradient(90deg,var(--primary),var(--secondary),var(--accent));
}
.cta-card h2{
  font-size:26px;
  font-weight:700;
  margin-bottom:14px;
}
.cta-card p{
  font-size:15px;
  color:var(--text-muted);
  max-width:520px;
  margin:0 auto 28px;
  line-height:1.8;
}
.cta-btns{
  display:flex;
  justify-content:center;
  gap:16px;
  flex-wrap:wrap;
}

/* ---------- Footer ---------- */
.footer{
  background:#0E2233;
  color:rgba(255,255,255,.85);
  padding:60px 0 20px;
  margin-top:40px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  margin-bottom:36px;
}
.footer-logo{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.footer-logo .logo-icon{
  background:rgba(255,255,255,.15);
  color:#fff;
}
.footer-logo .logo-text{
  color:#fff;
  font-size:18px;
}
.footer-logo .logo-text span{color:var(--secondary);}
.footer-col p{
  font-size:13px;
  line-height:1.8;
  color:rgba(255,255,255,.65);
}
.footer-col h4{
  font-size:16px;
  font-weight:600;
  color:#fff;
  margin-bottom:18px;
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul li a{
  font-size:14px;
  color:rgba(255,255,255,.70);
  transition:all .25s ease;
}
.footer-col ul li a:hover{
  color:var(--secondary);
  padding-left:4px;
}
.footer-contact li{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:rgba(255,255,255,.70);
  margin-bottom:10px;
}
.footer-contact i{
  color:var(--secondary);
  width:16px;
  text-align:center;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);
  padding-top:20px;
  text-align:center;
  font-size:12px;
  color:rgba(255,255,255,.50);
  display:flex;
  justify-content:center;
  gap:12px;
  flex-wrap:wrap;
}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .nav-links{gap:6px;}
  .nav-link{padding:10px 14px;font-size:13px;}
  .features-grid{grid-template-columns:repeat(2,1fr);}
  .process-steps{grid-template-columns:repeat(2,1fr);}
  .content-grid{grid-template-columns:1fr;}
  .sidebar{flex-direction:row;flex-wrap:wrap;}
  .sidebar-card{flex:1;min-width:220px;}
  .overview-card{grid-template-columns:1fr;padding:32px;}
  .overview-image img{height:200px;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}
}
@media(max-width:768px){
  .container,.container-fluid{padding:0 16px;}
  .header-nav{
    flex-wrap:wrap;
    padding:14px 16px;
    margin-top:12px;
  }
  .nav-links{
    display:none;
    width:100%;
    flex-direction:column;
    gap:8px;
    padding-top:14px;
    order:4;
  }
  .nav-links.open{display:flex;}
  .nav-link{
    width:100%;
    justify-content:flex-start;
    padding:14px 16px;
    font-size:14px;
  }
  .hamburger{
    display:flex;
    order:3;
  }
  .nav-cta{
    margin-left:auto;
    order:2;
  }
  .page-banner{
    padding:40px 24px 36px;
    margin-top:16px;
  }
  .page-banner h1{font-size:28px;}
  .page-banner p{font-size:15px;}
  .section-header{flex-direction:column;align-items:flex-start;gap:8px;}
  .features-grid{grid-template-columns:1fr;}
  .process-steps{grid-template-columns:1fr;}
  .overview-card{padding:24px;}
  .main-content{padding:24px;}
  .scenario-grid{grid-template-columns:1fr;}
  .cta-card{padding:40px 24px;}
  .cta-btns{flex-direction:column;gap:12px;}
  .cta-btns .btn{width:100%;}
  .sidebar{flex-direction:column;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
}
@media(max-width:520px){
  .nav-cta .btn{padding:10px 16px;font-size:13px;}
  .page-banner{padding:32px 20px 28px;}
  .page-banner h1{font-size:24px;}
  .features-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:4px;}
}

/* roulang page: article */
:root {
  --bg: #F2F6FB;
  --surface: #FFFFFF;
  --primary: #1E5E8E;
  --primary-hover: #174A70;
  --secondary: #3A8BA8;
  --accent: #D9A13B;
  --text: #1A2B3C;
  --text-muted: #5C7285;
  --line: #DCE5EE;
  --shadow-card: 0 6px 20px rgba(30, 70, 110, 0.08);
  --shadow-hover: 0 12px 30px rgba(30, 70, 110, 0.14);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-main: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-num: "DIN Alternate", "Bebas Neue", "Arial Narrow", sans-serif;
  --transition: all .25s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-fluid {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.4;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 3px solid rgba(30, 94, 142, 0.35);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}
.btn-light {
  background: #fff;
  color: var(--primary);
}
.btn-light:hover {
  background: #EDF2F7;
  transform: translateY(-1px);
}
.btn-outline-light {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.75);
  color: #fff;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}
.btn-block {
  width: 100%;
}
.btn-success {
  background: var(--secondary) !important;
  color: #fff !important;
}

/* ========== 顶部导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 20px 24px 0;
  background: var(--bg);
}
.header-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 20px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: relative;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 42px;
  height: 42px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  font-family: var(--font-num);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .5px;
}
.logo-text span {
  color: var(--primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  justify-content: center;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 120px;
  height: 48px;
  padding: 0 16px;
  background: #EDF2F7;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}
.nav-link i {
  font-size: 15px;
  color: var(--secondary);
}
.nav-link:hover {
  border-color: var(--primary);
  background: var(--surface);
  color: var(--primary);
  box-shadow: var(--shadow-card);
}
.nav-link.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.nav-link.active i {
  color: #fff;
}
.nav-cta {
  flex-shrink: 0;
}
.nav-cta .btn {
  padding: 10px 20px;
  font-size: 14px;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: #EDF2F7;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--transition);
}
.hamburger:hover {
  border-color: var(--primary);
}
.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========== 页面 Banner ========== */
.page-hero {
  max-width: 1200px;
  margin: 20px auto 0;
  padding: 56px 0 104px;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(rgba(10, 28, 45, 0.78), rgba(10, 28, 45, 0.55)),
    url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  color: #fff;
  position: relative;
  z-index: 1;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
}
.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
  transition: color .2s ease;
}
.breadcrumb a:hover {
  color: #fff;
}
.breadcrumb .sep {
  font-size: 11px;
  opacity: .6;
}
.breadcrumb .current {
  color: #fff;
  max-width: 420px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.page-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.4;
  color: #fff;
  margin: 0 0 16px;
  letter-spacing: .5px;
}
.page-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.meta-item i {
  color: var(--accent);
}
.meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 20px;
  font-size: 12px;
  color: #fff;
}

/* ========== 文章正文卡片 ========== */
.article-section {
  padding: 0;
}
.article-card {
  max-width: 800px;
  margin: -72px auto 0;
  position: relative;
  z-index: 5;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  padding: 48px;
}
.article-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}
.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 36px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
}
.article-body h3 {
  font-size: 19px;
  font-weight: 600;
  margin: 28px 0 12px;
  color: var(--text);
}
.article-body p {
  margin: 0 0 1.2em;
}
.article-body img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: 20px 0;
  height: auto;
}
.article-body figure {
  margin: 24px 0;
}
.article-body figcaption {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
}
.article-body blockquote {
  margin: 20px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--secondary);
  background: var(--bg);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}
.article-body ul,
.article-body ol {
  margin: 0 0 1.2em;
  padding-left: 1.5em;
}
.article-body ul li,
.article-body ol li {
  margin-bottom: 8px;
}
.article-body ul li::marker {
  color: var(--secondary);
}
.article-body a {
  color: var(--primary);
  text-decoration: underline;
  transition: color .2s ease;
}
.article-body a:hover {
  color: var(--primary-hover);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}
.article-body th,
.article-body td {
  border: 1px solid var(--line);
  padding: 10px 14px;
  text-align: left;
}
.article-body th {
  background: var(--bg);
  font-weight: 600;
}
.article-notfound {
  text-align: center;
  padding: 60px 20px;
}
.notfound-icon {
  width: 76px;
  height: 76px;
  margin: 0 auto 22px;
  background: var(--bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: var(--secondary);
}
.article-notfound h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.article-notfound p {
  color: var(--text-muted);
  margin-bottom: 26px;
  font-size: 15px;
}

/* ========== 相关推荐 ========== */
.related-section {
  padding: 72px 0 24px;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.section-head p {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}
.section-head.center {
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.section-head.center h2 {
  position: relative;
  padding-bottom: 14px;
}
.section-head.center h2::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 44px;
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.related-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition);
  display: block;
}
.related-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.related-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg);
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.related-card:hover .related-thumb img {
  transform: scale(1.04);
}
.related-info {
  padding: 16px 18px 18px;
}
.related-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  margin: 0 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color .25s ease;
}
.related-card:hover .related-info h3 {
  color: var(--primary);
}
.related-date {
  font-size: 13px;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.related-date i {
  color: var(--secondary);
}
.related-actions {
  margin-top: 32px;
}

/* ========== CTA 条 ========== */
.cta-section {
  padding: 56px 0;
}
.cta-inner {
  background: var(--primary);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  color: #fff;
  box-shadow: var(--shadow-card);
}
.cta-text h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 6px;
}
.cta-text p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  margin: 0;
}
.cta-actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

/* ========== FAQ ========== */
.faq-section {
  padding: 24px 0 72px;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow .25s ease;
}
.faq-item:hover {
  box-shadow: var(--shadow-hover);
}
.faq-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color .25s ease;
}
.faq-btn:hover {
  color: var(--primary);
}
.faq-btn > i:first-child {
  color: var(--secondary);
  font-size: 18px;
  flex-shrink: 0;
}
.faq-arrow {
  margin-left: auto;
  color: var(--text-muted) !important;
  font-size: 14px !important;
  transition: transform .3s ease;
}
.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}
.faq-body {
  display: none;
  padding: 0 22px 20px 52px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}
.faq-item.open .faq-body {
  display: block;
  animation: faqFade .3s ease;
}
@keyframes faqFade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== 联系表单 ========== */
.contact-section {
  padding: 0 0 72px;
}
.contact-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-left h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.contact-left > p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 22px;
}
.contact-points {
  list-style: none;
  display: grid;
  gap: 12px;
}
.contact-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
}
.contact-points li i {
  color: var(--secondary);
  font-size: 16px;
}
.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  transition: border-color .25s ease, box-shadow .25s ease;
  box-sizing: border-box;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 94, 142, 0.12);
}
.form-group textarea {
  resize: vertical;
  min-height: 90px;
}
.form-note {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 12px;
}

/* ========== 页脚 ========== */
.footer {
  background: #0E2233;
  color: #fff;
  padding: 64px 0 0;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  font-family: var(--font-num);
}
.footer-logo .logo-text {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .5px;
}
.footer-logo .logo-text span {
  color: var(--secondary);
}
.footer-col p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 18px;
  color: #fff;
}
.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}
.footer-col ul li a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  transition: color .25s ease;
}
.footer-col ul li a:hover {
  color: var(--secondary);
}
.footer-contact li {
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-contact li i {
  color: var(--secondary);
  width: 18px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
}

/* ========== 响应式 ========== */
@media (max-width: 991px) {
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    background: var(--surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-hover);
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    z-index: 1000;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-link {
    width: 100%;
    justify-content: flex-start;
    min-width: 0;
  }
  .hamburger {
    display: flex;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-card {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .cta-inner {
    padding: 32px 28px;
  }
}
@media (max-width: 768px) {
  .site-header {
    padding: 12px 12px 0;
  }
  .header-nav {
    padding: 12px 14px;
    border-radius: var(--radius-md);
  }
  .nav-cta .btn {
    padding: 8px 14px;
    font-size: 13px;
  }
  .page-hero {
    margin-top: 12px;
    padding: 40px 0 72px;
    border-radius: var(--radius-md);
  }
  .page-title {
    font-size: 28px;
  }
  .page-meta {
    gap: 12px;
  }
  .article-card {
    margin-top: -40px;
    padding: 28px 20px;
    border-radius: var(--radius-md);
  }
  .related-section {
    padding: 56px 0 20px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .contact-card {
    padding: 28px 20px;
    border-radius: var(--radius-md);
  }
  .contact-left h2 {
    font-size: 24px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .cta-inner {
    flex-direction: column;
    text-align: center;
    padding: 28px 20px;
  }
  .cta-actions {
    justify-content: center;
  }
  .faq-section {
    padding: 16px 0 56px;
  }
  .faq-btn {
    font-size: 15px;
    padding: 16px 18px;
  }
  .faq-body {
    padding: 0 18px 18px 44px;
  }
  .footer {
    padding-top: 48px;
  }
}
@media (max-width: 520px) {
  .logo-text {
    font-size: 16px;
  }
  .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 17px;
  }
  .nav-cta .btn {
    padding: 7px 10px;
    font-size: 12px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 6px;
  }
  .breadcrumb {
    font-size: 12px;
  }
  .breadcrumb .current {
    max-width: 220px;
  }
  .page-hero {
    padding: 32px 0 64px;
  }
  .page-title {
    font-size: 24px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .nav-links {
    left: 0;
    right: 0;
  }
}

/* roulang page: category2 */
:root {
  --bg: #F2F6FB;
  --surface: #FFFFFF;
  --primary: #1E5E8E;
  --primary-hover: #174A70;
  --secondary: #3A8BA8;
  --accent: #D9A13B;
  --text: #1A2B3C;
  --text-muted: #5C7285;
  --line: #DCE5EE;
  --dark: #0E2233;
  --shadow-card: 0 6px 20px rgba(30, 70, 110, 0.08);
  --shadow-hover: 0 12px 30px rgba(30, 70, 110, 0.14);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style: none;
}
button {
  font-family: inherit;
}
.container-fluid {
  width: 100%;
  padding: 0 24px;
  box-sizing: border-box;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 15px;
  line-height: 1.4;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(30, 94, 142, 0.25);
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(30, 94, 142, 0.3);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.12);
}
.btn-outline-dark {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline-dark:hover {
  background: var(--primary);
  color: #fff;
}
/* 导航 */
.header-nav {
  max-width: 1200px;
  margin: 20px auto 0;
  padding: 18px 24px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  position: relative;
  z-index: 100;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "DIN Alternate", "Bebas Neue", sans-serif;
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}
.logo-text span {
  color: var(--primary);
}
.nav-links {
  display: flex;
  gap: 12px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #EDF2F7;
  color: var(--text);
  padding: 0 18px;
  border-radius: var(--radius-md);
  height: 48px;
  border: 1.5px solid transparent;
  transition: all 0.3s ease;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
}
.nav-link i {
  color: var(--secondary);
  font-size: 15px;
  transition: color 0.3s;
}
.nav-link:hover {
  background: #fff;
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-card);
}
.nav-link.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.nav-link.active i {
  color: #fff;
}
.nav-cta {
  margin-left: auto;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
}
.hamburger span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}
.hamburger:hover span {
  background: var(--primary);
}
/* 分类页 Hero */
.category-hero {
  margin-top: 20px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  background: linear-gradient(rgba(10, 28, 45, 0.76), rgba(10, 28, 45, 0.55)), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  padding: 64px 48px;
}
.category-hero .breadcrumb {
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
  margin-bottom: 16px;
}
.category-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.9);
}
.category-hero .breadcrumb a:hover {
  color: #fff;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 14px;
  margin-bottom: 18px;
  backdrop-filter: blur(4px);
}
.category-hero h1 {
  color: #fff;
  font-size: 38px;
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 14px;
}
.hero-sub {
  color: rgba(255, 255, 255, 0.9);
  font-size: 16px;
  max-width: 680px;
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
/* 分类内容两栏 */
.category-content {
  padding: 56px 0 0;
}
.content-wrap {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
  align-items: start;
}
.content-main {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 40px;
}
.section-title {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  padding-left: 16px;
}
.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: 24px;
  background: var(--primary);
  border-radius: 2px;
}
.content-main p {
  margin-bottom: 16px;
  color: var(--text);
}
.content-main img {
  border-radius: var(--radius-md);
  margin: 20px 0;
  width: 100%;
  object-fit: cover;
  max-height: 340px;
}
.content-main h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 8px 0 12px;
}
.content-blockquote {
  border-left: 4px solid var(--secondary);
  background: var(--bg);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin: 20px 0;
  color: var(--text-muted);
  font-size: 14px;
}
.content-list {
  margin: 16px 0 0;
}
.content-list li {
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
}
.content-list li i {
  color: var(--secondary);
}
.content-list li:last-child {
  border-bottom: none;
}
.content-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.side-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 22px;
  transition: box-shadow 0.3s, transform 0.3s;
}
.side-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.side-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}
.side-card h3 i {
  color: var(--secondary);
}
.side-card ul li {
  border-bottom: 1px dashed var(--line);
}
.side-card ul li:last-child {
  border-bottom: none;
}
.side-card ul li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 0;
  font-size: 14px;
  color: var(--text);
  transition: color 0.3s;
}
.side-card ul li a:hover {
  color: var(--primary);
}
.side-card ul li a i {
  font-size: 12px;
  color: var(--text-muted);
}
.side-contact {
  text-align: center;
  padding: 24px 20px;
}
.side-contact p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.side-contact .btn {
  width: 100%;
}
/* 亮点卖点 */
.category-features {
  background: var(--surface);
  padding: 80px 0;
  margin-top: 56px;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 44px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 10px;
}
.section-head p {
  color: var(--text-muted);
  font-size: 15px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all 0.3s;
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  background: #fff;
  border-color: transparent;
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(30, 94, 142, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
}
/* 适用场景 */
.scenario-section {
  padding: 80px 0;
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 28px 22px;
  text-align: center;
  border-top: 4px solid var(--secondary);
  transition: all 0.3s;
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.scenario-num {
  font-size: 36px;
  font-family: "DIN Alternate", "Bebas Neue", sans-serif;
  color: var(--accent);
  margin-bottom: 8px;
}
.scenario-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.scenario-card p {
  font-size: 14px;
  color: var(--text-muted);
}
/* 流程 */
.process-section {
  background: var(--surface);
  padding: 80px 0;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  position: relative;
  background: var(--bg);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--line);
  transition: box-shadow 0.3s, transform 0.3s;
}
.process-step:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.process-step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-size: 28px;
  font-family: "DIN Alternate", "Bebas Neue", sans-serif;
  font-weight: 700;
  color: var(--secondary);
  display: block;
  margin-bottom: 12px;
}
.process-step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: var(--text-muted);
}
/* FAQ */
.faq-section {
  padding: 80px 0;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow 0.3s;
}
.faq-item:hover {
  box-shadow: var(--shadow-hover);
}
.faq-item.open {
  border: 1px solid rgba(30, 94, 142, 0.15);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color 0.3s;
}
.faq-q:hover {
  color: var(--primary);
}
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: rgba(30, 94, 142, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.faq-arrow {
  margin-left: auto;
  color: var(--text-muted);
  transition: transform 0.3s;
  font-size: 14px;
}
.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}
.faq-a {
  display: none;
  padding: 16px 18px;
  margin: 0 20px 20px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-muted);
}
.faq-item.open .faq-a {
  display: block;
}
/* CTA */
.cta-section {
  padding: 20px 0 80px;
}
.cta-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  text-align: center;
  padding: 56px 40px;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(30, 94, 142, 0.06);
}
.cta-card::after {
  content: "";
  position: absolute;
  bottom: -60px;
  left: -60px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(58, 139, 168, 0.08);
}
.cta-card h2 {
  font-size: 28px;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.cta-card p {
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}
/* 页脚 */
.footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.85);
  padding: 60px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 36px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-logo .logo-icon {
  background: var(--secondary);
}
.footer-logo .logo-text {
  color: #fff;
}
.footer-logo .logo-text span {
  color: var(--secondary);
}
.footer p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
}
.footer-col h4 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: color 0.3s;
}
.footer-col ul li a:hover {
  color: var(--secondary);
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}
.footer-contact i {
  color: var(--secondary);
  width: 16px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  display: flex;
  justify-content: center;
  gap: 12px;
  align-items: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  flex-wrap: wrap;
}
/* 响应式 */
@media (max-width: 1024px) {
  .feature-grid,
  .scenario-grid,
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .content-wrap {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 992px) {
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-hover);
    padding: 16px;
    flex-direction: column;
    z-index: 200;
  }
  .nav-links.show {
    display: flex;
  }
  .nav-link {
    width: 100%;
    justify-content: flex-start;
  }
  .nav-cta {
    margin-left: 0;
  }
  .hamburger {
    display: flex;
  }
}
@media (max-width: 768px) {
  .container-fluid,
  .container {
    padding: 0 16px;
  }
  .category-hero {
    padding: 40px 24px;
  }
  .category-hero h1 {
    font-size: 28px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .content-main {
    padding: 24px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .category-features,
  .scenario-section,
  .process-section,
  .faq-section {
    padding: 56px 0;
  }
  .cta-card {
    padding: 36px 24px;
  }
  .cta-card h2 {
    font-size: 24px;
  }
}
@media (max-width: 520px) {
  .feature-grid,
  .scenario-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .header-nav {
    padding: 14px 16px;
  }
  .logo-text {
    font-size: 17px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }
}