/* roulang page: index */
:root {
  --primary: #2B6DE8;
  --primary-600: #1E5BD1;
  --primary-50: #EBF2FF;
  --accent: #0FA3A3;
  --accent-50: #E0F5F5;
  --bg: #FFFFFF;
  --bg-soft: #F6F8FB;
  --text-1: #1A2333;
  --text-2: #5B6575;
  --text-3: #97A0B0;
  --line: #E5E9F0;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #E5484D;
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(23,33,51,0.04), 0 4px 12px rgba(23,33,51,0.06);
  --shadow-md: 0 8px 24px rgba(23,33,51,0.10);
  --shadow-lg: 0 16px 40px rgba(23,33,51,0.14);
  --transition: 0.25s ease;
  --font-base: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-1);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease;
}

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

button,
input,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 96px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}

.section-head p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.6;
  max-width: 640px;
  margin: 0 auto;
}

.section-head.split {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  text-align: left;
  gap: 24px;
  flex-wrap: wrap;
}

.section-head.split p {
  margin: 0;
}

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

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  transition: color 0.25s ease, gap 0.25s ease;
}

.text-link:hover {
  color: var(--primary-600);
  gap: 8px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease, transform 0.15s ease;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid rgba(43, 109, 232, 0.35);
  outline-offset: 2px;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(43, 109, 232, 0.22);
}

.btn-primary:hover {
  background: var(--primary-600);
  box-shadow: 0 8px 22px rgba(43, 109, 232, 0.30);
}

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

.btn-outline:hover {
  background: var(--primary-50);
  border-color: var(--primary-600);
}

.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 6px 16px rgba(43, 109, 232, 0.18);
}

.btn-white:hover {
  background: var(--primary-50);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.85);
  color: #fff;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
}

.btn-lg {
  height: 52px;
  padding: 0 32px;
  font-size: 16px;
}

.btn-sm {
  height: 38px;
  padding: 0 18px;
  font-size: 14px;
}

/* 徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
}

.badge-primary {
  background: var(--primary-50);
  color: var(--primary);
}

.badge-accent {
  background: var(--accent);
  color: #fff;
}

/* 导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.header-inner {
  position: relative;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-right {
  gap: 28px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  padding: 6px 0;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.25s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.logo {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-50);
  color: var(--primary);
  flex-shrink: 0;
}

.logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: 0.5px;
}

.header-cta {
  margin-left: 4px;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  gap: 5px;
  z-index: 110;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100vh;
  background: #fff;
  z-index: 105;
  padding: 96px 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.mobile-menu-title {
  font-size: 16px;
  font-weight: 600;
}

.mobile-close {
  font-size: 28px;
  line-height: 1;
  color: var(--text-2);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}

.mobile-close:hover {
  background: var(--bg-soft);
}

.mobile-link {
  display: block;
  padding: 14px 12px;
  font-size: 20px;
  font-weight: 500;
  color: var(--text-1);
  border-radius: 10px;
  transition: background 0.25s ease, color 0.25s ease;
}

.mobile-link:hover,
.mobile-link.active {
  background: var(--primary-50);
  color: var(--primary);
}

.mobile-cta {
  margin-top: 16px;
  width: 100%;
}

/* Hero */
.hero {
  position: relative;
  background: linear-gradient(100deg, #ffffff 0%, var(--primary-50) 55%, rgba(224, 245, 245, 0.6) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 300px;
  height: 300px;
  background: rgba(43, 109, 232, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
  min-height: 520px;
  padding-top: 80px;
  padding-bottom: 80px;
  position: relative;
}

.hero-content {
  max-width: 560px;
}

.hero-content h1 {
  font-size: 42px;
  line-height: 1.25;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.hero-sub {
  font-size: 20px;
  line-height: 1.6;
  color: var(--text-2);
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-actions svg {
  width: 18px;
  height: 18px;
}

.hero-trust {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-3);
}

.hero-trust .dot {
  color: var(--line);
  font-weight: 700;
}

.hero-visual {
  position: relative;
}

.hero-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.hero-img-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px 24px;
  background: linear-gradient(to top, rgba(43, 109, 232, 0.75), rgba(43, 109, 232, 0));
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding-top: 48px;
}

/* 信任数据条 */
.stats-bar {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 32px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 8px 0;
}

.stat-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-2);
}

/* 核心价值 */
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.value-card {
  background: #fff;
  border: 1px solid transparent;
  border-radius: var(--radius-card);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.value-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--primary-50);
}

.value-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-50);
  color: var(--primary);
  flex-shrink: 0;
}

.value-icon svg {
  width: 24px;
  height: 24px;
}

.value-card h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: -6px;
}

.value-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.65;
  flex-grow: 1;
}

/* 轮播 */
.carousel-section {
  background: var(--bg-soft);
}

.carousel-wrap {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.carousel-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: #fff;
}

.carousel-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
}

.carousel-slide.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

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

.carousel-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 24px;
  background: linear-gradient(to top, rgba(26, 35, 51, 0.65), rgba(26, 35, 51, 0));
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  padding-top: 64px;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow-sm);
  font-size: 20px;
  line-height: 1;
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
  z-index: 5;
}

.carousel-btn:hover {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.carousel-btn.prev {
  left: -20px;
}

.carousel-btn.next {
  right: -20px;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.carousel-dots .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line);
  transition: background 0.3s ease, width 0.3s ease;
}

.carousel-dots .dot.active,
.carousel-dots .dot:hover {
  background: var(--primary);
  width: 24px;
  border-radius: 4px;
}

/* 系统要求 */
.req-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.req-left h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}

.req-left>p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 32px;
}

.req-points {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.req-points li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.point-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-50);
  color: var(--primary);
  flex-shrink: 0;
}

.point-icon svg {
  width: 20px;
  height: 20px;
}

.req-points strong {
  display: block;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.req-points p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}

.env-card {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  border: 1px solid var(--line);
}

.env-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.env-row:first-child {
  padding-top: 0;
}

.env-row:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.env-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.5px;
}

.env-value {
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.6;
}

/* 评价墙 */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.testimonial-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

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

.testimonial-card.offset {
  margin-top: 16px;
}

.rating {
  color: var(--warning);
  font-size: 16px;
  letter-spacing: 2px;
  line-height: 1;
}

.testimonial-card>p {
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.7;
  flex-grow: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  background: var(--primary-50);
  color: var(--primary);
  flex-shrink: 0;
}

.avatar-2 {
  background: var(--accent-50);
  color: var(--accent);
}

.avatar-3 {
  background: #EEF0F4;
  color: var(--text-2);
}

.testimonial-author strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
}

.testimonial-author span {
  display: block;
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.4;
}

/* FAQ */
.faq-section {
  background: var(--bg-soft);
}

.faq-container {
  max-width: 800px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-card);
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
  min-height: 56px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  text-align: left;
  transition: color 0.25s ease;
}

.faq-question:hover {
  color: var(--primary);
}

.icon-plus {
  position: relative;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--line);
  flex-shrink: 0;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.icon-plus::before,
.icon-plus::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--text-2);
  border-radius: 1px;
  transition: background 0.25s ease;
}

.icon-plus::before {
  width: 10px;
  height: 1.5px;
}

.icon-plus::after {
  width: 1.5px;
  height: 10px;
}

.faq-item.open .icon-plus {
  transform: rotate(45deg);
  border-color: var(--primary);
}

.faq-item.open .icon-plus::before,
.faq-item.open .icon-plus::after {
  background: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  padding: 0 24px 20px 56px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

/* 下载区 */
.download-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.download-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.download-buttons .btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.download-tip {
  font-size: 14px;
  color: var(--text-3);
  text-align: center;
  line-height: 1.6;
}

.qr-card {
  background: #fff;
  border: 1px dashed var(--line);
  border-radius: var(--radius-card);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  width: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.qr-box {
  width: 160px;
  height: 160px;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-card span {
  font-size: 13px;
  color: var(--text-3);
}

/* 最新资讯 */
.news-section {
  background: var(--bg-soft);
}

.news-layout {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 32px;
  align-items: start;
}

.news-feature {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.news-feature:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.news-feature-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.news-feature-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.news-feature:hover .news-feature-cover img {
  transform: scale(1.04);
}

.news-feature-cover .badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
}

.news-feature-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.news-feature-body h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-feature-body p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--text-3);
}

.news-readmore {
  color: var(--primary);
  font-weight: 500;
  white-space: nowrap;
}

.news-side {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 0 24px;
}

.news-list-item {
  border-bottom: 1px solid var(--line);
}

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

.news-list-item a {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  transition: opacity 0.25s ease;
}

.news-list-item a:hover {
  opacity: 0.85;
}

.news-list-thumb {
  width: 96px;
  height: 64px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}

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

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

.news-list-info h4 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-list-info p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 6px;
}

.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 64px 24px;
  text-align: center;
  color: var(--text-3);
  font-size: 14px;
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  color: var(--line);
}

/* CTA */
.cta-section {
  position: relative;
  padding: 64px 24px;
  background: linear-gradient(120deg, var(--primary-50) 0%, var(--accent-50) 100%), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  text-align: center;
  overflow: hidden;
}

.cta-section::before,
.cta-section::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.cta-section::before {
  width: 240px;
  height: 240px;
  background: rgba(43, 109, 232, 0.10);
  top: -80px;
  right: 5%;
}

.cta-section::after {
  width: 180px;
  height: 180px;
  background: rgba(15, 163, 163, 0.10);
  bottom: -60px;
  left: 8%;
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.cta-inner h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}

.cta-inner p {
  font-size: 15px;
  color: var(--text-2);
  margin-bottom: 28px;
  line-height: 1.6;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* 页脚 */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--line);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}

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

.footer-brand p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
  max-width: 240px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-1);
}

.footer-col a,
.footer-col p {
  display: block;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 8px;
  transition: color 0.25s ease;
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 24px 0;
  text-align: center;
  font-size: 14px;
  color: var(--text-3);
}

/* 响应式 */
@media (max-width: 1200px) {
  .container {
    padding: 0 24px;
  }

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

  .carousel-viewport {
    max-width: 900px;
  }
}

@media (max-width: 992px) {
  .section {
    padding: 64px 0;
  }

  .nav-left,
  .nav-right {
    gap: 20px;
  }

  .nav-right .nav-link:nth-child(1),
  .nav-right .nav-link:nth-child(2) {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .header-cta {
    margin-left: auto;
    margin-right: 8px;
    padding: 0 16px;
    height: 38px;
    font-size: 14px;
  }

  .logo {
    left: 50%;
    transform: translate(-50%, -50%);
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
    min-height: auto;
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-trust {
    justify-content: center;
  }

  .hero-visual {
    max-width: 640px;
    margin: 0 auto;
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
  }

  .req-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .testimonial-card.offset {
    margin-top: 0;
  }

  .news-layout {
    grid-template-columns: 1fr;
  }

  .news-side {
    padding: 0 20px;
  }

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

  .carousel-btn.prev {
    left: 12px;
  }

  .carousel-btn.next {
    right: 12px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .section {
    padding: 48px 0;
  }

  .section-head {
    margin-bottom: 32px;
  }

  .section-head h2 {
    font-size: 22px;
  }

  .section-head.split {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

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

  .hero-content h1 {
    font-size: 28px;
    line-height: 1.3;
  }

  .hero-sub {
    font-size: 17px;
  }

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

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .req-left h2 {
    font-size: 22px;
  }

  .download-wrap {
    flex-direction: column;
    gap: 32px;
  }

  .download-buttons .btn-group {
    flex-direction: column;
    width: 100%;
  }

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

  .news-list-item a {
    align-items: flex-start;
  }

  .news-list-thumb {
    width: 76px;
    height: 56px;
  }

  .cta-inner h2 {
    font-size: 22px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-actions .btn {
    width: 100%;
  }

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

@media (max-width: 520px) {
  .header-cta {
    display: none;
  }

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

  .logo-icon {
    width: 36px;
    height: 36px;
  }

  .hero-inner {
    padding-top: 44px;
    padding-bottom: 44px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .stat-item {
    padding: 4px 0;
  }

  .env-card {
    padding: 24px;
  }

  .faq-question {
    font-size: 15px;
    padding: 0 16px;
    min-height: 52px;
  }

  .faq-answer p {
    padding: 0 16px 16px 16px;
  }

  .news-side {
    padding: 0 16px;
  }

  .news-list-item a {
    flex-direction: row;
  }

  .news-list-thumb {
    width: 64px;
    height: 56px;
  }

  .news-list-info h4 {
    font-size: 14px;
  }

  .news-list-info p {
    font-size: 13px;
  }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #2B6DE8;
            --primary-600: #1E5BD1;
            --primary-50: #EBF2FF;
            --accent: #0FA3A3;
            --accent-50: #E0F5F5;
            --bg: #FFFFFF;
            --bg-soft: #F6F8FB;
            --text-1: #1A2333;
            --text-2: #5B6575;
            --text-3: #97A0B0;
            --line: #E5E9F0;
            --success: #10B981;
            --warning: #F59E0B;
            --danger: #E5484D;
            --shadow-card: 0 1px 2px rgba(23, 33, 51, 0.04), 0 4px 12px rgba(23, 33, 51, 0.06);
            --shadow-hover: 0 8px 24px rgba(23, 33, 51, 0.10);
            --shadow-lg: 0 16px 40px rgba(23, 33, 51, 0.14);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-badge: 6px;
            --radius-image: 20px;
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-1);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }
        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== 导航栏 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg);
            border-bottom: 1px solid var(--line);
            height: 72px;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-2);
            padding: 6px 2px;
            position: relative;
            transition: color 0.25s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
            transition: width 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            height: 40px;
            padding: 0 20px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.15s ease;
            box-shadow: 0 4px 12px rgba(43, 109, 232, 0.2);
        }
        .nav-cta:hover {
            background: var(--primary-600);
            box-shadow: 0 6px 18px rgba(43, 109, 232, 0.28);
        }
        .nav-cta:active {
            transform: translateY(1px);
        }
        /* Logo 居中 */
        .logo {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            z-index: 2;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-50);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-1);
            white-space: nowrap;
        }
        /* 移动端 */
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 6px;
            width: 44px;
            height: 44px;
            padding: 10px;
            z-index: 110;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-1);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .nav-toggle.open span:first-child {
            transform: translateY(4px) rotate(45deg);
        }
        .nav-toggle.open span:last-child {
            transform: translateY(-4px) rotate(-45deg);
        }
        .mobile-cta {
            display: none;
            height: 36px;
            padding: 0 16px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            border-radius: 8px;
            align-items: center;
            box-shadow: 0 4px 12px rgba(43, 109, 232, 0.2);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            inset: 0;
            background: var(--bg);
            z-index: 105;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 20px;
            padding: 40px 24px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .mobile-link {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-1);
            padding: 8px 0;
        }
        .mobile-menu .mobile-link.active {
            color: var(--primary);
        }
        .mobile-menu .mobile-btn {
            display: inline-flex;
            margin-top: 12px;
            height: 48px;
            padding: 0 36px;
            background: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 10px;
            align-items: center;
            box-shadow: 0 6px 16px rgba(43, 109, 232, 0.25);
        }

        /* ========== 页头 Banner ========== */
        .page-banner {
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 56px 0;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(235, 242, 255, 0.95), rgba(255, 255, 255, 0.88));
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            font-size: 14px;
            color: var(--text-3);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-3);
        }
        .page-banner h1 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-1);
            margin-bottom: 12px;
        }
        .page-banner h1 .highlight {
            color: var(--primary);
        }
        .page-banner p {
            font-size: 15px;
            color: var(--text-2);
            max-width: 640px;
            line-height: 1.7;
        }

        /* ========== 区块标题 ========== */
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-tag {
            display: inline-block;
            background: var(--primary-50);
            color: var(--primary);
            border-radius: var(--radius-badge);
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.5px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            margin: 14px 0 8px;
            color: var(--text-1);
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-2);
            line-height: 1.6;
            max-width: 560px;
            margin: 0 auto;
        }

        /* ========== 服务矩阵 ========== */
        .service-matrix {
            padding: 80px 0;
            background: var(--bg);
        }
        .matrix-top {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 24px;
            margin-bottom: 24px;
        }
        .matrix-card {
            background: var(--bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--line);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .matrix-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-50);
        }
        .matrix-card-lg {
            display: flex;
            flex-direction: column;
        }
        .matrix-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .matrix-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .matrix-card:hover .matrix-img img {
            transform: scale(1.03);
        }
        .matrix-img .img-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 6px;
            box-shadow: 0 4px 10px rgba(15, 163, 163, 0.3);
        }
        .matrix-content {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .matrix-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-50);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 20px;
        }
        .matrix-content h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-1);
        }
        .matrix-content p {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.7;
            margin-bottom: 20px;
            flex: 1;
        }
        .matrix-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.25s ease, color 0.25s ease;
        }
        .matrix-link:hover {
            gap: 10px;
            color: var(--primary-600);
        }
        /* 下排小卡 */
        .matrix-bottom {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .matrix-card-sm {
            padding: 24px;
            display: flex;
            flex-direction: column;
        }
        .matrix-card-sm .matrix-icon {
            width: 44px;
            height: 44px;
            font-size: 18px;
            margin-bottom: 14px;
        }
        .matrix-card-sm h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .matrix-card-sm p {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== 服务流程 ========== */
        .service-process {
            padding: 80px 0;
            background: var(--bg-soft);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            position: relative;
        }
        .process-step {
            position: relative;
            text-align: center;
            padding: 32px 20px 28px;
            background: var(--bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .process-step:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 44px;
            right: -40px;
            width: 40px;
            border-top: 2px dashed var(--line);
        }
        .process-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .process-step h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-1);
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 80px 0;
            background: var(--bg);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(43, 109, 232, 0.08);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-1);
            text-align: left;
            transition: color 0.25s ease;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            position: relative;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid var(--line);
            background: var(--bg);
            flex-shrink: 0;
            transition: border-color 0.25s ease, background 0.25s ease;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--primary);
            border-radius: 1px;
            transition: transform 0.25s ease, opacity 0.25s ease;
        }
        .faq-icon::before {
            width: 10px;
            height: 2px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }
        .faq-icon::after {
            width: 2px;
            height: 10px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }
        .faq-item.active .faq-icon {
            border-color: var(--primary);
            background: var(--primary-50);
        }
        .faq-item.active .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
            opacity: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 600px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.7;
            padding: 0 20px 18px 56px;
        }

        /* ========== CTA 通栏 ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-50), var(--accent-50));
            padding: 56px 24px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(43, 109, 232, 0.06);
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(15, 163, 163, 0.07);
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 8px;
        }
        .cta-section p {
            font-size: 15px;
            color: var(--text-2);
            margin-bottom: 28px;
            line-height: 1.6;
        }
        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--bg);
            color: var(--primary);
            height: 48px;
            padding: 0 32px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            box-shadow: 0 6px 16px rgba(43, 109, 232, 0.16);
            transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
        }
        .btn-white:hover {
            background: var(--primary-50);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(43, 109, 232, 0.22);
        }
        .btn-white:active {
            transform: translateY(0);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg);
            border-top: 1px solid var(--line);
            padding-top: 64px;
        }
        .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: 8px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.6;
            max-width: 260px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
            color: var(--text-1);
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-2);
            margin-bottom: 10px;
            transition: color 0.25s ease;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-col p {
            font-size: 14px;
            color: var(--text-2);
            margin-bottom: 8px;
            line-height: 1.6;
        }
        .footer-bottom {
            border-top: 1px solid var(--line);
            padding: 20px 0;
            text-align: center;
            font-size: 14px;
            color: var(--text-3);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1199px) {
            .container {
                padding: 0 24px;
            }
            .matrix-bottom {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        @media (max-width: 991px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-cta {
                display: inline-flex;
            }
            .logo {
                left: 50%;
                transform: translate(-50%, -50%);
            }
            .header-inner {
                justify-content: flex-start;
            }
            .matrix-top {
                grid-template-columns: 1fr 1fr;
            }
            .matrix-bottom {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .process-step:not(:last-child)::after {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 20px;
            }
            .site-header {
                height: 64px;
            }
            .header-inner {
                height: 64px;
            }
            .page-banner {
                padding: 44px 0;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 14px;
            }
            .service-matrix {
                padding: 56px 0;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .section-head p {
                font-size: 14px;
            }
            .matrix-top {
                grid-template-columns: 1fr;
                margin-bottom: 0;
            }
            .matrix-bottom {
                grid-template-columns: 1fr;
                margin-top: 24px;
            }
            .service-process {
                padding: 56px 0;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .faq-section {
                padding: 56px 0;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px;
            }
            .faq-answer p {
                padding: 0 16px 16px 40px;
            }
            .cta-section {
                padding: 44px 20px;
            }
            .cta-section h2 {
                font-size: 20px;
            }
            .btn-white {
                width: 100%;
                justify-content: center;
            }
            .site-footer {
                padding-top: 48px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                padding-bottom: 32px;
            }
            .mobile-menu .mobile-link {
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .logo-text {
                font-size: 15px;
            }
            .mobile-cta {
                padding: 0 12px;
                font-size: 12px;
                height: 32px;
            }
        }

/* roulang page: article */
:root {
    --primary: #2B6DE8;
    --primary-600: #1E5BD1;
    --primary-50: #EBF2FF;
    --accent: #0FA3A3;
    --accent-50: #E0F5F5;
    --bg: #FFFFFF;
    --bg-soft: #F6F8FB;
    --text-1: #1A2333;
    --text-2: #5B6575;
    --text-3: #97A0B0;
    --line: #E5E9F0;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #E5484D;
    --radius: 14px;
    --radius-sm: 8px;
    --shadow: 0 1px 2px rgba(23, 33, 51, 0.04), 0 4px 12px rgba(23, 33, 51, 0.06);
    --shadow-lg: 0 16px 40px rgba(23, 33, 51, 0.14);
    --transition: 0.25s ease;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-1);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    display: block;
}
button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
}
input,
textarea {
    font-family: inherit;
}
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 46px;
    padding: 0 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    transition: all var(--transition);
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 16px rgba(43, 109, 232, 0.22);
}
.btn-primary:hover {
    background: var(--primary-600);
    box-shadow: 0 8px 20px rgba(43, 109, 232, 0.3);
    transform: translateY(-1px);
}
.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 4px 10px rgba(43, 109, 232, 0.2);
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 46px;
    padding: 0 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    background: #fff;
    border: 1px solid var(--primary);
    color: var(--primary);
    transition: all var(--transition);
}
.btn-outline:hover {
    background: var(--primary-50);
    border-color: var(--primary-600);
}
.btn-outline:active {
    background: var(--primary);
    color: #fff;
}
.btn-block {
    width: 100%;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: 72px;
    background: #fff;
    border-bottom: 1px solid var(--line);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
    position: relative;
}
.nav-left,
.nav-right {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav-link {
    position: relative;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-2);
    padding: 8px 2px;
    transition: color var(--transition);
}
.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: width var(--transition);
}
.nav-link:hover {
    color: var(--primary);
}
.nav-link:hover::after {
    width: 100%;
}
.nav-link.active {
    color: var(--primary);
}
.nav-link.active::after {
    width: 100%;
}
.site-logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--primary-50);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.logo-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-1);
    white-space: nowrap;
}
.btn-nav {
    height: 38px;
    padding: 0 18px;
    font-size: 14px;
    border-radius: 8px;
    box-shadow: none;
}
.btn-nav-mobile {
    display: none;
    height: 36px;
    padding: 0 14px;
    font-size: 13px;
    border-radius: 8px;
    box-shadow: none;
}
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    border-radius: 8px;
    background: transparent;
    transition: background var(--transition);
}
.nav-toggle:hover {
    background: var(--bg-soft);
}
.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-1);
    border-radius: 2px;
    transition: transform 0.25s ease;
}
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    z-index: 200;
    padding: 24px 32px;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.3s ease, visibility 0.3s ease;
}
.mobile-menu.open {
    transform: translateX(0);
    visibility: visible;
}
.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 24px;
}
.mobile-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.mobile-logo .logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}
.mobile-menu-close {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-2);
    transition: background var(--transition), color var(--transition);
}
.mobile-menu-close:hover {
    background: var(--bg-soft);
    color: var(--text-1);
}
.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.mobile-nav .mobile-link {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-1);
    padding: 12px 0;
    border-bottom: 1px solid var(--bg-soft);
    transition: color var(--transition);
}
.mobile-nav .mobile-link:hover {
    color: var(--primary);
}
.mobile-nav .mobile-link.active {
    color: var(--primary);
}
.mobile-nav .btn {
    margin-top: 24px;
    height: 52px;
    font-size: 16px;
}
.breadcrumb-wrap {
    background: #fff;
    border-bottom: 1px solid var(--line);
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-3);
    padding: 12px 0;
    max-width: 1200px;
    margin: 0 auto;
}
.breadcrumb a {
    color: var(--text-3);
    transition: color var(--transition);
    white-space: nowrap;
}
.breadcrumb a:hover {
    color: var(--primary);
}
.breadcrumb .sep {
    color: var(--line);
}
.breadcrumb .current {
    color: var(--text-2);
    max-width: 280px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.article-page {
    padding: 56px 0 80px;
    min-height: 60vh;
    background: #fff;
}
.article-wrapper {
    max-width: 780px;
    margin: 0 auto;
}
.article-header {
    text-align: center;
    padding-bottom: 32px;
}
.article-header h1 {
    font-size: 36px;
    line-height: 1.3;
    font-weight: 700;
    color: var(--text-1);
    letter-spacing: -0.01em;
}
.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
    color: var(--text-3);
    margin-top: 16px;
}
.article-meta time {
    color: var(--text-3);
}
.article-divider {
    width: 32px;
    height: 4px;
    background: var(--primary);
    border-radius: 4px;
    margin: 20px auto 0;
}
.article-body {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-1);
    word-wrap: break-word;
}
.article-body > p:first-child {
    font-size: 17px;
}
.article-body p {
    margin-bottom: 24px;
}
.article-body h2 {
    font-size: 22px;
    font-weight: 700;
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--text-1);
}
.article-body h3 {
    font-size: 18px;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 12px;
    color: var(--text-1);
}
.article-body a {
    color: var(--primary);
    border-bottom: 1px solid rgba(43, 109, 232, 0.3);
    transition: border-color var(--transition);
}
.article-body a:hover {
    border-bottom-color: var(--primary);
}
.article-body blockquote {
    background: var(--primary-50);
    border-left: 4px solid var(--primary);
    border-radius: 8px;
    padding: 16px 20px;
    margin: 24px 0;
    color: var(--text-2);
}
.article-body pre {
    background: var(--bg-soft);
    border-radius: 8px;
    padding: 12px 16px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 14px;
    overflow-x: auto;
    margin: 24px 0;
    line-height: 1.6;
}
.article-body code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 14px;
    background: var(--bg-soft);
    border-radius: 4px;
    padding: 2px 6px;
}
.article-body pre code {
    background: none;
    padding: 0;
}
.article-body img {
    border-radius: var(--radius);
    margin: 24px auto;
    box-shadow: var(--shadow);
    max-width: 100%;
    height: auto;
}
.article-body figure {
    margin: 24px 0;
}
.article-body figure figcaption {
    font-size: 13px;
    color: var(--text-3);
    text-align: center;
    margin-top: 8px;
}
.article-body ul,
.article-body ol {
    margin: 0 0 24px;
    padding-left: 24px;
}
.article-body li {
    margin-bottom: 8px;
}
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    display: block;
    overflow-x: auto;
    white-space: nowrap;
}
.article-body th {
    background: var(--bg-soft);
    font-size: 14px;
    font-weight: 600;
    padding: 12px 16px;
    border-bottom: 1px solid var(--line);
    text-align: left;
}
.article-body td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
}
@media (min-width: 768px) {
    .article-body table {
        display: table;
        white-space: normal;
    }
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 32px 0 24px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
}
.article-tag {
    display: inline-block;
    padding: 6px 10px;
    background: var(--primary-50);
    color: var(--primary);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition);
}
.article-tag:hover {
    background: var(--primary);
    color: #fff;
}
.article-share {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}
.article-share span {
    font-size: 14px;
    color: var(--text-2);
}
.share-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 10px;
    color: var(--text-2);
    background: #fff;
    transition: all var(--transition);
}
.share-btn:hover {
    background: var(--primary-50);
    color: var(--primary);
    border-color: var(--primary);
}
.share-btn:active {
    background: var(--primary);
    color: #fff;
}
.related-section {
    margin-top: 48px;
}
.related-section h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-1);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}
.related-card:hover {
    box-shadow: 0 8px 24px rgba(23, 33, 51, 0.1);
    transform: translateY(-4px);
}
.related-card-img {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--bg-soft);
}
.related-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.related-card:hover .related-card-img img {
    transform: scale(1.03);
}
.related-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    border-radius: 6px;
    padding: 4px 10px;
    letter-spacing: 0.02em;
}
.related-card-body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.related-card-body h3 {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-1);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card-time {
    font-size: 13px;
    color: var(--text-3);
    margin-top: auto;
}
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-2);
    margin-top: 32px;
    transition: all var(--transition);
}
.back-link:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-50);
}
.back-link:active {
    background: var(--primary);
    color: #fff;
}
.article-notfound {
    text-align: center;
    padding: 120px 24px;
    max-width: 780px;
    margin: 0 auto;
}
.article-notfound .nf-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    border-radius: 18px;
    background: var(--bg-soft);
    color: var(--text-3);
    display: flex;
    align-items: center;
    justify-content: center;
}
.article-notfound h2 {
    font-size: 24px;
    color: var(--text-1);
    margin-bottom: 8px;
}
.article-notfound p {
    color: var(--text-2);
    margin-bottom: 24px;
    font-size: 15px;
}
.cta-section {
    background: linear-gradient(135deg, rgba(235, 242, 255, 0.96), rgba(224, 245, 245, 0.96)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
    padding: 56px 24px;
    text-align: center;
}
.cta-inner {
    max-width: 640px;
    margin: 0 auto;
}
.cta-inner h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 12px;
}
.cta-inner p {
    font-size: 15px;
    color: var(--text-2);
    margin-bottom: 24px;
}
.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.cta-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 48px;
    padding: 0 32px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    background: #fff;
    color: var(--primary);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}
.cta-btn-primary:hover {
    background: var(--primary-50);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}
.cta-btn-primary:active {
    transform: translateY(0);
}
.cta-btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 48px;
    padding: 0 32px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    transition: all var(--transition);
}
.cta-btn-outline:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
}
.cta-btn-outline:active {
    background: var(--primary);
    color: #fff;
}
.site-footer {
    background: #fff;
    border-top: 1px solid var(--line);
    padding: 64px 0 32px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}
.footer-logo .logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}
.footer-brand p {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.6;
    max-width: 260px;
}
.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 16px;
}
.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-2);
    line-height: 2;
    transition: color var(--transition);
}
.footer-col a:hover {
    color: var(--primary);
}
.footer-col p {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.8;
}
.footer-bottom {
    text-align: center;
    font-size: 14px;
    color: var(--text-3);
    padding-top: 24px;
    border-top: 1px solid var(--line);
}
@media (max-width: 1200px) {
    .container {
        padding: 0 24px;
    }
    .header-inner {
        padding: 0 24px;
    }
}
@media (max-width: 991px) {
    .nav-left,
    .nav-right {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
    .btn-nav-mobile {
        display: inline-flex;
    }
    .site-logo {
        position: relative;
        left: auto;
        transform: none;
    }
    .header-inner {
        justify-content: space-between;
        gap: 8px;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}
@media (max-width: 767px) {
    .container {
        padding: 0 20px;
    }
    .header-inner {
        padding: 0 20px;
    }
    .article-page {
        padding: 40px 0 56px;
    }
    .article-header h1 {
        font-size: 28px;
        line-height: 1.3;
    }
    .article-meta {
        font-size: 13px;
        gap: 6px;
    }
    .article-body {
        font-size: 15px;
        line-height: 1.75;
    }
    .article-body h2 {
        font-size: 20px;
    }
    .article-body h3 {
        font-size: 17px;
    }
    .article-body blockquote {
        padding: 12px 16px;
    }
    .related-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .related-card-img {
        aspect-ratio: 16 / 9;
    }
    .breadcrumb {
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .breadcrumb::-webkit-scrollbar {
        display: none;
    }
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    .cta-btn-primary,
    .cta-btn-outline {
        width: 100%;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .footer-bottom {
        font-size: 13px;
    }
    .back-link {
        width: 100%;
        justify-content: center;
    }
    .article-share {
        flex-wrap: wrap;
    }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
    :root {
      --primary: #2B6DE8;
      --primary-600: #1E5BD1;
      --primary-50: #EBF2FF;
      --accent: #0FA3A3;
      --accent-50: #E0F5F5;
      --bg: #FFFFFF;
      --bg-soft: #F6F8FB;
      --text-1: #1A2333;
      --text-2: #5B6575;
      --text-3: #97A0B0;
      --line: #E5E9F0;
      --success: #10B981;
      --warning: #F59E0B;
      --danger: #E5484D;
      --radius-card: 14px;
      --radius-btn: 10px;
      --radius-badge: 6px;
      --shadow-card: 0 1px 2px rgba(23,33,51,0.04), 0 4px 12px rgba(23,33,51,0.06);
      --shadow-hover: 0 8px 24px rgba(23,33,51,0.10);
      --shadow-btn: 0 6px 16px rgba(43,109,232,0.22);
      --shadow-lg: 0 16px 40px rgba(23,33,51,0.14);
      --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
      --container: 1200px;
      --header-h: 72px;
    }

    /* ===== Reset / Base ===== */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-family);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-1);
      background: var(--bg);
      -webkit-font-smoothing: antialiased;
    }
    img {
      display: block;
      max-width: 100%;
      height: auto;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.25s ease;
    }
    ul {
      list-style: none;
    }
    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }
    input, textarea {
      font-family: inherit;
    }

    /* ===== 容器 ===== */
    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding-left: 32px;
      padding-right: 32px;
    }

    /* ===== 按钮 ===== */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 46px;
      padding: 0 28px;
      background: var(--primary);
      color: #fff;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all 0.25s ease;
      box-shadow: var(--shadow-btn);
      white-space: nowrap;
    }
    .btn-primary:hover {
      background: var(--primary-600);
      box-shadow: 0 8px 20px rgba(43,109,232,0.30);
      transform: translateY(-1px);
      color: #fff;
    }
    .btn-primary:active {
      transform: translateY(1px);
      box-shadow: 0 3px 8px rgba(43,109,232,0.20);
    }
    .btn-primary:focus-visible {
      outline: 3px solid rgba(43,109,232,0.25);
      outline-offset: 2px;
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 46px;
      padding: 0 28px;
      background: #fff;
      color: var(--primary);
      border: 1px solid var(--primary);
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
    }
    .btn-outline:hover {
      background: var(--primary-50);
      border-color: var(--primary-600);
      color: var(--primary-600);
      transform: translateY(-1px);
    }
    .btn-outline:active {
      transform: translateY(1px);
    }
    .btn-outline:focus-visible {
      outline: 3px solid rgba(43,109,232,0.25);
      outline-offset: 2px;
    }
    .btn-sm {
      height: 38px;
      padding: 0 18px;
      font-size: 14px;
      border-radius: 8px;
    }
    .btn-lg {
      height: 52px;
      padding: 0 36px;
      font-size: 16px;
    }

    /* ===== 导航栏 ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: #fff;
      border-bottom: 1px solid var(--line);
      height: var(--header-h);
    }
    .header-inner {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      height: var(--header-h);
      gap: 16px;
    }
    .nav-left {
      display: flex;
      align-items: center;
      gap: 28px;
      justify-self: start;
    }
    .nav-right {
      display: flex;
      align-items: center;
      gap: 28px;
      justify-self: end;
    }
    .header-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      justify-self: center;
    }
    .logo-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--primary-50);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .logo-text {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-1);
      white-space: nowrap;
    }
    .nav-link {
      position: relative;
      display: inline-block;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-2);
      padding: 10px 2px;
      transition: color 0.25s ease;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::after {
      width: 100%;
    }
    .nav-link:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 4px;
      border-radius: 4px;
    }
    .menu-toggle {
      display: none;
      width: 40px;
      height: 40px;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 6px;
      cursor: pointer;
      border: none;
      background: none;
      border-radius: 8px;
      transition: background 0.25s ease;
    }
    .menu-toggle:hover {
      background: var(--primary-50);
    }
    .menu-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--text-1);
      border-radius: 2px;
      transition: transform 0.3s ease, opacity 0.3s ease;
    }
    .menu-toggle.active span:nth-child(1) {
      transform: translateY(4px) rotate(45deg);
    }
    .menu-toggle.active span:nth-child(2) {
      transform: translateY(-4px) rotate(-45deg);
    }
    .header-cta-mobile {
      display: none;
    }

    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 0;
      right: 0;
      width: 100%;
      height: 100vh;
      background: #fff;
      z-index: 200;
      padding: 96px 32px 32px;
      transform: translateX(100%);
      transition: transform 0.3s ease;
      overflow-y: auto;
    }
    .mobile-menu.open {
      transform: translateX(0);
    }
    .mobile-menu-close {
      position: absolute;
      top: 20px;
      right: 24px;
      width: 40px;
      height: 40px;
      border-radius: 8px;
      border: 1px solid var(--line);
      background: #fff;
      color: var(--text-1);
      font-size: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: background 0.25s ease;
    }
    .mobile-menu-close:hover {
      background: var(--primary-50);
    }
    .mobile-nav {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .mobile-nav-link {
      font-size: 20px;
      font-weight: 600;
      color: var(--text-1);
      padding: 14px 0;
      border-bottom: 1px solid var(--line);
      transition: color 0.25s ease;
    }
    .mobile-nav-link:hover {
      color: var(--primary);
    }
    .mobile-nav-link.active {
      color: var(--primary);
    }
    .mobile-cta {
      margin-top: 24px;
    }

    /* ===== 页头 Banner ===== */
    .page-hero {
      position: relative;
      padding: 56px 0 56px;
      background: linear-gradient(135deg, var(--primary-50) 0%, #ffffff 70%);
      overflow: hidden;
    }
    .page-hero-bg {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
      opacity: 0.10;
    }
    .page-hero .container {
      position: relative;
      z-index: 1;
    }
    .breadcrumb {
      font-size: 14px;
      color: var(--text-3);
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
    }
    .breadcrumb a {
      color: var(--text-3);
      text-decoration: none;
    }
    .breadcrumb a:hover {
      color: var(--primary);
    }
    .breadcrumb .sep {
      color: var(--text-3);
      margin: 0 2px;
    }
    .breadcrumb .current {
      color: var(--text-2);
      font-weight: 500;
    }
    .page-hero h1 {
      font-size: 42px;
      line-height: 1.25;
      font-weight: 700;
      color: var(--text-1);
      margin: 0 0 12px;
      letter-spacing: 0.5px;
    }
    .page-hero .subtitle {
      font-size: 15px;
      color: var(--text-2);
      max-width: 640px;
      line-height: 1.7;
      margin: 0;
    }

    /* ===== 板块通用 ===== */
    .section {
      padding: 96px 0;
    }
    .section-soft {
      background: var(--bg-soft);
    }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 56px;
    }
    .section-header h2 {
      font-size: 30px;
      line-height: 1.3;
      font-weight: 700;
      color: var(--text-1);
      margin: 0 0 12px;
    }
    .section-header p {
      font-size: 15px;
      line-height: 1.7;
      color: var(--text-2);
      margin: 0;
    }

    /* ===== 产品交替图文区 ===== */
    .alt-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
      margin-bottom: 96px;
    }
    .alt-row:last-child {
      margin-bottom: 0;
    }
    .alt-row.reverse .alt-media {
      order: 2;
    }
    .alt-media {
      position: relative;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .alt-media img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .alt-media:hover img {
      transform: scale(1.03);
    }
    .alt-media::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 60%, rgba(26,35,51,0.25));
      pointer-events: none;
    }
    .alt-content {
      padding: 8px 4px;
    }
    .alt-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 16px;
    }
    .alt-badge {
      display: inline-flex;
      align-items: center;
      font-size: 13px;
      font-weight: 500;
      padding: 6px 12px;
      border-radius: var(--radius-badge);
      background: var(--primary-50);
      color: var(--primary);
      transition: background 0.25s ease, color 0.25s ease;
    }
    .alt-badge:hover {
      background: var(--primary);
      color: #fff;
    }
    .alt-badge.accent {
      background: var(--accent-50);
      color: var(--accent);
    }
    .alt-badge.accent:hover {
      background: var(--accent);
      color: #fff;
    }
    .alt-content h3 {
      font-size: 26px;
      line-height: 1.3;
      font-weight: 700;
      color: var(--text-1);
      margin: 0 0 12px;
    }
    .alt-content .desc {
      font-size: 14px;
      line-height: 1.75;
      color: var(--text-2);
      margin: 0 0 20px;
    }
    .alt-list {
      margin: 0 0 24px;
      padding: 0;
    }
    .alt-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      line-height: 1.6;
      color: var(--text-1);
      padding: 6px 0;
    }
    .alt-list li svg {
      flex-shrink: 0;
      margin-top: 3px;
      color: var(--accent);
    }
    .alt-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      transition: gap 0.25s ease, color 0.25s ease;
    }
    .alt-link:hover {
      gap: 10px;
      color: var(--primary-600);
    }

    /* ===== 功能对比表 ===== */
    .table-wrap {
      overflow-x: auto;
      background: #fff;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--line);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
    }
    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      text-align: center;
      border-bottom: 1px solid var(--line);
      font-size: 14px;
      line-height: 1.6;
    }
    .compare-table th {
      background: var(--primary-50);
      font-weight: 600;
      color: var(--text-1);
    }
    .compare-table th:first-child {
      text-align: left;
      background: transparent;
    }
    .compare-table td:first-child {
      text-align: left;
      font-weight: 600;
      color: var(--text-1);
    }
    .compare-table td {
      color: var(--text-2);
    }
    .compare-table tr:last-child th,
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table .recommend-col {
      background: var(--primary-50);
    }
    .recommend-tag {
      display: inline-block;
      font-size: 11px;
      font-weight: 600;
      background: var(--accent);
      color: #fff;
      padding: 2px 8px;
      border-radius: 4px;
      margin-left: 6px;
      vertical-align: middle;
      letter-spacing: 0.5px;
    }
    .check-icon {
      color: var(--success);
      display: inline-flex;
    }
    .minus-icon {
      color: var(--text-3);
    }

    /* ===== 系统与环境要求 ===== */
    .sys-card {
      max-width: 680px;
      margin: 0 auto;
      background: #fff;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--line);
      padding: 32px 40px;
    }
    .sys-row {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      padding: 18px 0;
      border-bottom: 1px solid var(--line);
      gap: 24px;
    }
    .sys-row:last-child {
      border-bottom: none;
    }
    .sys-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-1);
      flex-shrink: 0;
      min-width: 72px;
    }
    .sys-value {
      font-size: 14px;
      color: var(--text-2);
      text-align: right;
      line-height: 1.7;
    }
    .sys-tag {
      display: inline-block;
      background: var(--bg-soft);
      border: 1px solid var(--line);
      border-radius: 6px;
      padding: 3px 10px;
      font-size: 13px;
      margin: 2px 0 2px 6px;
      color: var(--text-1);
    }

    /* ===== FAQ ===== */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--line);
      margin-bottom: 12px;
      overflow: hidden;
      transition: box-shadow 0.25s ease;
    }
    .faq-item:hover {
      box-shadow: var(--shadow-hover);
    }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      padding: 22px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-1);
      background: none;
      border: none;
      text-align: left;
      cursor: pointer;
      transition: color 0.25s ease;
      gap: 16px;
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-question:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: -4px;
      border-radius: var(--radius-card);
    }
    .faq-icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      border: 1px solid var(--line);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      color: var(--primary);
      transition: transform 0.25s ease, background 0.25s ease;
      flex-shrink: 0;
      line-height: 1;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      background: var(--primary-50);
    }
    .faq-answer {
      padding: 0 24px 24px;
      font-size: 14px;
      line-height: 1.75;
      color: var(--text-2);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
      animation: fadeIn 0.25s ease;
    }
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(-4px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* ===== CTA 通栏 ===== */
    .cta-section {
      padding: 64px 24px;
      background: linear-gradient(135deg, var(--primary-50) 0%, var(--accent-50) 100%);
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .cta-section::before {
      content: '';
      position: absolute;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: rgba(43,109,232,0.06);
      top: -120px;
      right: -80px;
    }
    .cta-section::after {
      content: '';
      position: absolute;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: rgba(15,163,163,0.08);
      bottom: -80px;
      left: -60px;
    }
    .cta-inner {
      position: relative;
      z-index: 1;
      max-width: 720px;
      margin: 0 auto;
    }
    .cta-inner h2 {
      font-size: 28px;
      line-height: 1.3;
      font-weight: 700;
      color: var(--text-1);
      margin: 0 0 12px;
    }
    .cta-inner p {
      font-size: 15px;
      line-height: 1.7;
      color: var(--text-2);
      margin: 0 0 28px;
    }
    .cta-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .cta-buttons .btn-primary {
      background: #fff;
      color: var(--primary);
      box-shadow: 0 6px 16px rgba(43,109,232,0.15);
    }
    .cta-buttons .btn-primary:hover {
      background: var(--primary-50);
      box-shadow: 0 8px 20px rgba(43,109,232,0.25);
    }
    .cta-buttons .btn-outline {
      background: transparent;
      border-color: var(--primary);
      color: var(--primary);
    }
    .cta-buttons .btn-outline:hover {
      background: var(--primary);
      color: #fff;
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: #fff;
      border-top: 1px solid var(--line);
      padding: 64px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
      gap: 48px;
      padding-bottom: 48px;
    }
    .footer-brand .footer-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 16px;
    }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-2);
      max-width: 260px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-1);
      margin: 0 0 16px;
    }
    .footer-col a {
      display: block;
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-2);
      padding: 4px 0;
      transition: color 0.25s ease, padding-left 0.25s ease;
    }
    .footer-col a:hover {
      color: var(--primary);
      padding-left: 4px;
    }
    .footer-col p {
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-2);
      padding: 4px 0;
    }
    .footer-bottom {
      border-top: 1px solid var(--line);
      padding: 20px 0 24px;
      text-align: center;
      font-size: 14px;
      color: var(--text-3);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1200px) {
      .container {
        padding-left: 24px;
        padding-right: 24px;
      }
      .alt-row {
        gap: 40px;
      }
    }

    @media (max-width: 991px) {
      .section {
        padding: 64px 0;
      }
      .menu-toggle {
        display: flex;
      }
      .nav-left,
      .nav-right {
        display: none;
      }
      .header-inner {
        grid-template-columns: auto 1fr auto;
      }
      .header-logo {
        justify-self: center;
      }
      .header-cta-mobile {
        display: inline-flex;
      }
      .alt-row {
        grid-template-columns: 1fr;
        gap: 32px;
        margin-bottom: 64px;
      }
      .alt-row.reverse .alt-media {
        order: 0;
      }
      .alt-media img {
        aspect-ratio: 16 / 9;
      }
      .alt-content {
        text-align: left;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
      }
      .page-hero h1 {
        font-size: 32px;
      }
      .section-header h2 {
        font-size: 24px;
      }
    }

    @media (max-width: 767px) {
      .container {
        padding-left: 20px;
        padding-right: 20px;
      }
      .section {
        padding: 44px 0;
      }
      .section-header {
        margin-bottom: 32px;
      }
      .page-hero {
        padding: 40px 0;
      }
      .page-hero h1 {
        font-size: 28px;
      }
      .page-hero .subtitle {
        font-size: 14px;
      }
      .alt-row {
        gap: 24px;
        margin-bottom: 48px;
      }
      .alt-content h3 {
        font-size: 20px;
      }
      .sys-card {
        padding: 24px;
      }
      .sys-row {
        flex-direction: column;
        gap: 6px;
        padding: 16px 0;
      }
      .sys-value {
        text-align: left;
      }
      .cta-inner h2 {
        font-size: 22px;
      }
      .cta-buttons .btn-primary,
      .cta-buttons .btn-outline {
        width: 100%;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-bottom {
        font-size: 13px;
      }
      .btn-lg {
        width: 100%;
      }
      .compare-table th,
      .compare-table td {
        padding: 12px 14px;
        font-size: 13px;
      }
    }

    @media (max-width: 520px) {
      .header-cta-mobile {
        padding: 0 14px;
        font-size: 13px;
        height: 34px;
      }
      .logo-text {
        font-size: 15px;
      }
      .logo-icon {
        width: 34px;
        height: 34px;
      }
    }

/* roulang page: category3 */
:root {
  --primary: #2B6DE8;
  --primary-600: #1E5BD1;
  --primary-50: #EBF2FF;
  --accent: #0FA3A3;
  --accent-50: #E0F5F5;
  --bg: #FFFFFF;
  --bg-soft: #F6F8FB;
  --text-1: #1A2333;
  --text-2: #5B6575;
  --text-3: #97A0B0;
  --line: #E5E9F0;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #E5484D;
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-badge: 6px;
  --shadow-sm: 0 1px 2px rgba(23,33,51,0.04), 0 4px 12px rgba(23,33,51,0.06);
  --shadow-md: 0 8px 24px rgba(23,33,51,0.10);
  --shadow-lg: 0 16px 40px rgba(23,33,51,0.14);
  --transition: 0.25s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-1);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button, input, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(43,109,232,0.22);
}
.btn-primary:hover {
  background: var(--primary-600);
  box-shadow: 0 8px 20px rgba(43,109,232,0.30);
}
.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 4px 10px rgba(43,109,232,0.20);
}
.btn-outline {
  background: #fff;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-50);
  border-color: var(--primary-600);
}
.btn-outline:active {
  background: var(--primary);
  color: #fff;
}
.btn-sm {
  height: 38px;
  padding: 0 20px;
  font-size: 14px;
}
.btn:focus-visible {
  outline: 3px solid rgba(43,109,232,0.30);
  outline-offset: 2px;
}
.section-tag {
  display: inline-block;
  background: var(--primary-50);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-badge);
  margin-bottom: 16px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--line);
  height: 72px;
}
.header-wrap {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 72px;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  min-width: 140px;
}
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary-50);
  color: var(--primary);
  border-radius: 10px;
  flex-shrink: 0;
}
.logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: 0.5px;
}
.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-right {
  justify-content: flex-end;
}
.nav-link {
  position: relative;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  padding: 8px 0;
  transition: color var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition);
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link:hover::after {
  width: 100%;
}
.nav-link.active {
  color: var(--primary);
}
.nav-link.active::after {
  width: 100%;
}
.nav-link:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 4px;
  border-radius: 4px;
}
.header-cta {
  margin-left: 4px;
}
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  gap: 5px;
  transition: background var(--transition);
}
.menu-toggle:hover {
  background: var(--primary-50);
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100vh;
  background: var(--bg);
  z-index: 999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 40px 24px;
  transition: right 0.3s ease;
}
.mobile-menu.open {
  right: 0;
}
.mobile-menu .mobile-link {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-1);
  padding: 14px 0;
  transition: color var(--transition);
}
.mobile-menu .mobile-link:hover,
.mobile-menu .mobile-link.active {
  color: var(--primary);
}
.mobile-menu .btn {
  margin-top: 24px;
  width: 100%;
  max-width: 280px;
}
.mobile-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--bg-soft);
  color: var(--text-1);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition);
}
.mobile-close:hover {
  background: var(--primary-50);
  color: var(--primary);
}

/* Page Banner */
.page-banner {
  position: relative;
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--bg) 70%);
  padding: 64px 0 56px;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  background: rgba(43,109,232,0.08);
  border-radius: 50%;
  pointer-events: none;
}
.breadcrumb {
  font-size: 14px;
  color: var(--text-3);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb a {
  color: var(--text-3);
  transition: color var(--transition);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb .sep {
  color: var(--text-3);
  font-size: 13px;
}
.banner-title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-1);
  margin-bottom: 16px;
  max-width: 640px;
}
.banner-subtitle {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-2);
  max-width: 560px;
}

/* About Intro */
.about-intro {
  padding: 96px 0 64px;
}
.intro-grid {
  display: grid;
  grid-template-columns: 6fr 6fr;
  gap: 64px;
  align-items: center;
}
.intro-text h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-1);
  margin-bottom: 20px;
}
.intro-text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-1);
  margin-bottom: 18px;
}
.intro-text p:last-child {
  margin-bottom: 0;
}
.intro-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.intro-image img {
  width: 100%;
  height: auto;
  aspect-ratio: 16/10;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.intro-image:hover img {
  transform: scale(1.03);
}

/* Stats */
.stats-section {
  background: var(--bg-soft);
  padding: 48px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-item {
  text-align: center;
  padding: 20px 0;
  border-right: 1px solid var(--line);
}
.stat-item:last-child {
  border-right: none;
}
.stat-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-2);
}

/* Timeline */
.timeline-section {
  padding: 96px 0;
}
.timeline-section h2 {
  text-align: center;
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 60px;
}
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 0;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: var(--line);
}
.timeline-item {
  position: relative;
  width: 50%;
  padding-right: 48px;
  margin-bottom: 40px;
  text-align: right;
}
.timeline-item:nth-child(even) {
  margin-left: 50%;
  padding-right: 0;
  padding-left: 48px;
  text-align: left;
}
.timeline-item:last-child {
  margin-bottom: 0;
}
.timeline-dot {
  position: absolute;
  top: 10px;
  right: -8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--primary-50);
  box-shadow: 0 0 0 4px rgba(43,109,232,0.12);
  z-index: 2;
}
.timeline-item:nth-child(even) .timeline-dot {
  right: auto;
  left: -8px;
}
.timeline-year {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}
.timeline-content {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  background: var(--bg-soft);
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
}

/* Culture */
.culture-section {
  background: var(--bg-soft);
  padding: 96px 0;
}
.culture-section h2 {
  text-align: center;
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
}
.culture-subtitle {
  text-align: center;
  font-size: 15px;
  color: var(--text-2);
  margin-bottom: 48px;
}
.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}
.culture-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.culture-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.culture-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.culture-card:nth-child(1) .culture-icon {
  background: var(--primary-50);
  color: var(--primary);
}
.culture-card:nth-child(2) .culture-icon {
  background: var(--accent-50);
  color: var(--accent);
}
.culture-card:nth-child(3) .culture-icon {
  background: #E8ECF2;
  color: #5B6575;
}
.culture-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 10px;
}
.culture-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
}
.partners-title {
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 28px;
}
.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.partner-item {
  height: 64px;
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-3);
  filter: grayscale(100%);
  transition: filter var(--transition), border-color var(--transition), color var(--transition);
}
.partner-item:hover {
  filter: grayscale(0);
  color: var(--text-1);
  border-color: var(--primary);
}

/* Contact */
.contact-section {
  padding: 96px 0;
}
.contact-section h2 {
  text-align: center;
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
}
.contact-subtitle {
  text-align: center;
  font-size: 15px;
  color: var(--text-2);
  margin-bottom: 48px;
}
.contact-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 48px;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-soft);
  border-radius: 12px;
  padding: 20px;
}
.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #fff;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}
.contact-item-label {
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 4px;
}
.contact-item-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-1);
}
.contact-form-wrap {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-1);
  margin-bottom: 8px;
}
.form-control {
  width: 100%;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  font-size: 15px;
  color: var(--text-1);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control::placeholder {
  color: var(--text-3);
}
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43,109,232,0.12);
}
textarea.form-control {
  height: auto;
  min-height: 120px;
  padding: 14px;
  resize: vertical;
  line-height: 1.6;
}
.form-success {
  background: var(--accent-50);
  color: var(--accent);
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}

/* CTA */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--accent-50) 100%);
  padding: 72px 24px;
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -60px;
  left: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,0.20);
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255,255,255,0.16);
}
.cta-section .container {
  position: relative;
  z-index: 1;
}
.cta-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 12px;
}
.cta-subtitle {
  font-size: 15px;
  color: var(--text-2);
  margin-bottom: 32px;
}
.cta-section .btn {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 6px 16px rgba(43,109,232,0.18);
}
.cta-section .btn:hover {
  background: var(--primary-50);
  box-shadow: 0 8px 20px rgba(43,109,232,0.26);
}

/* Footer */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--line);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
  max-width: 260px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-2);
  padding: 6px 0;
  transition: color var(--transition);
}
.footer-col a:hover {
  color: var(--primary);
}
.footer-col p {
  font-size: 14px;
  color: var(--text-2);
  padding: 6px 0;
}
.footer-bottom {
  text-align: center;
  font-size: 14px;
  color: var(--text-3);
  border-top: 1px solid var(--line);
  padding-top: 32px;
}

/* Responsive */
@media (max-width: 991px) {
  .nav-left, .nav-right {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .header-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
  .intro-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .timeline::before {
    left: 8px;
  }
  .timeline-item,
  .timeline-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    padding-left: 40px;
    padding-right: 0;
    text-align: left;
  }
  .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot {
    left: 0;
    right: auto;
  }
  .culture-grid {
    grid-template-columns: 1fr 1fr;
  }
  .partners-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 767px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .banner-title {
    font-size: 28px;
    line-height: 1.3;
  }
  .about-intro {
    padding: 56px 0 40px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 16px 0;
  }
  .stat-item:nth-child(odd) {
    border-right: 1px solid var(--line);
  }
  .stat-number {
    font-size: 26px;
  }
  .timeline-section {
    padding: 56px 0;
  }
  .culture-section {
    padding: 56px 0;
  }
  .culture-grid {
    grid-template-columns: 1fr;
  }
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-section {
    padding: 56px 0;
  }
  .contact-form-wrap {
    padding: 24px;
  }
  .btn {
    width: 100%;
  }
  .cta-title {
    font-size: 22px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}
@media (max-width: 520px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .stat-item {
    border-right: none !important;
    border-bottom: 1px solid var(--line);
  }
  .stat-item:last-child {
    border-bottom: none;
  }
  .partners-grid {
    grid-template-columns: 1fr;
  }
}