/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #1B3A4B;
  --primary-dark: #122730;
  --accent: #C9A06C;
  --accent-green: #3D7B6E;
  --bg: #F5F2ED;
  --card-bg: #FFFFFF;
  --title-color: #1B1B1B;
  --text-color: #2A2A2A;
  --muted-color: #7A8084;
  --dark-muted: #A0AAB0;
  --border-color: #E2DCD3;
  --radius-lg: 16px;
  --radius-md: 8px;
  --radius-sm: 12px;
  --shadow-rest: 0 1px 4px rgba(18,39,48,0.05);
  --shadow-hover: 0 12px 32px rgba(18,39,48,0.10);
  --shadow-modal: 0 24px 48px rgba(18,39,48,0.18);
  --transition: all 0.25s ease;
  --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

/* ===== Reset / 基础 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text-color);
  line-height: 1.8;
  font-size: 0.9375rem;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
ul, ol { list-style: none; }
button { font-family: inherit; }
.container { max-width: 1200px; padding-left: 32px; padding-right: 32px; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== 左侧竖向导航 ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 80px;
  height: 100vh;
  background: var(--primary-dark);
  z-index: 1040;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0;
  border-right: 1px solid rgba(255,255,255,0.05);
}
.side-nav .brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0 0;
  flex-shrink: 0;
}
.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(201,160,108,0.12);
  border: 1px solid rgba(201,160,108,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: var(--transition);
}
.brand-logo:hover { background: rgba(201,160,108,0.22); }
.side-nav .brand-name {
  display: block;
  margin-top: 8px;
  font-size: 11px;
  color: var(--dark-muted);
  letter-spacing: 0.03em;
}
.nav-links {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  margin-top: 40px;
}
.nav-link {
  width: 100%;
  height: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--dark-muted);
  font-size: 12px;
  position: relative;
  transition: var(--transition);
}
.nav-link svg {
  width: 22px;
  height: 22px;
  stroke: #8A959C;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--accent);
}
.nav-link:hover svg {
  stroke: var(--accent);
}
.nav-link.active {
  color: #ffffff;
}
.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}
.nav-link.active svg {
  stroke: var(--accent);
}
.nav-footer {
  padding-bottom: 20px;
  text-align: center;
  color: #5A6A72;
  font-size: 10px;
  flex-shrink: 0;
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  width: 36px;
  height: 36px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}
.mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}
.mobile-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 主内容区 ===== */
.main-wrapper {
  margin-left: 80px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 90vh;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #122730 0%, rgba(18,39,48,0.65) 45%, rgba(18,39,48,0.25) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
.hero-content .hero-title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  letter-spacing: 0.02em;
  max-width: 640px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}
.hero-subtitle {
  margin-top: 20px;
  font-size: 1rem;
  color: #C8D0D4;
  max-width: 480px;
  line-height: 1.7;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}
.hero-cta {
  margin-top: 36px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}
.btn-main {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.btn-main:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(18,39,48,0.25);
}
.btn-main:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn-ghost {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-ghost:active { transform: translateY(0); }
.text-link {
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.text-link .arrow {
  transition: transform 0.25s ease;
  display: inline-block;
}
.text-link:hover .arrow {
  transform: translateX(4px);
}
.text-link-light {
  color: #C8D0D4;
}
.text-link-light:hover {
  color: var(--accent);
}
.scroll-down {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}
.scroll-down .scroll-line {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.4);
  position: relative;
  overflow: hidden;
}
.scroll-down .scroll-line::after {
  content: '';
  position: absolute;
  left: 0;
  top: -100%;
  width: 100%;
  height: 100%;
  background: var(--accent);
  animation: scrollLine 2s ease-in-out infinite;
}
.scroll-down .scroll-arrow {
  margin-top: 8px;
  font-size: 16px;
  animation: bounceDown 2s ease-in-out infinite;
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes scrollLine {
  0% { top: -100%; }
  50% { top: 100%; }
  100% { top: 100%; }
}
@keyframes bounceDown {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(6px); opacity: 1; }
}

/* ===== 通用板块 ===== */
.section-block {
  padding: 80px 0;
}
.section-header {
  margin-bottom: 48px;
}
.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--title-color);
  line-height: 1.3;
  letter-spacing: 0.01em;
}
.section-line {
  width: 40px;
  height: 2px;
  background: var(--accent);
  margin-top: 16px;
}
.section-desc {
  margin-top: 16px;
  color: var(--muted-color);
  font-size: 0.9375rem;
  max-width: 620px;
}

/* ===== 痛点提问区 ===== */
.pain-points {
  background: var(--bg);
  padding: 80px 0;
}
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}
.pain-item {
  position: relative;
  padding-top: 20px;
  transition: var(--transition);
}
.pain-item .pain-num {
  font-size: 3rem;
  font-weight: 700;
  color: rgba(201,160,108,0.3);
  font-feature-settings: 'tnum';
  line-height: 1;
}
.pain-item .pain-title {
  margin-top: 20px;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--title-color);
  transition: var(--transition);
}
.pain-item:hover .pain-title { color: var(--accent); }
.pain-item .pain-desc {
  margin-top: 10px;
  font-size: 0.875rem;
  color: var(--muted-color);
  line-height: 1.7;
  max-width: 260px;
}

/* ===== 方案卡片区 ===== */
.solutions {
  background: var(--bg);
  padding-bottom: 80px;
}
.solution-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.solution-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow-rest);
}
.solution-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}
.solution-card .icon-wrap {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.solution-card .icon-wrap svg {
  width: 32px;
  height: 32px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.solution-card .card-title {
  margin-top: 16px;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--title-color);
  line-height: 1.4;
}
.solution-card .card-desc {
  margin-top: 10px;
  font-size: 0.875rem;
  color: var(--muted-color);
  line-height: 1.7;
  flex: 1;
}
.solution-card .card-link {
  margin-top: 20px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.solution-card .card-link .arrow { transition: transform 0.25s ease; }
.solution-card .card-link:hover { color: var(--accent); }
.solution-card .card-link:hover .arrow { transform: translateX(4px); }

/* ===== 数据区 ===== */
.stats-section {
  background: var(--primary-dark);
  padding: 64px 0;
  color: #fff;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat-item {
  text-align: center;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.2);
}
.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  font-feature-settings: 'tnum';
}
.stat-label {
  margin-top: 8px;
  font-size: 0.8125rem;
  color: var(--dark-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ===== 最新信息区 ===== */
.latest-section {
  background: var(--bg);
  padding: 80px 0;
}
.latest-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
}
.latest-list {
  display: flex;
  flex-direction: column;
}
.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 16px;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  transition: var(--transition);
  background: transparent;
}
.news-item:hover {
  background: #ECE9E4;
  border-left-color: var(--accent);
}
.news-date {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
}
.news-date .date-day {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
}
.news-date .date-year {
  font-size: 0.625rem;
  color: var(--dark-muted);
  line-height: 1.4;
  margin-top: 2px;
}
.news-info {
  flex: 1;
  min-width: 0;
}
.news-info .news-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--title-color);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.5;
  transition: var(--transition);
}
.news-item:hover .news-title { color: var(--primary); }
.news-info .news-excerpt {
  font-size: 0.8125rem;
  color: var(--muted-color);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 4px;
}
.news-side {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.news-tag {
  display: inline-block;
  padding: 2px 10px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--accent);
  white-space: nowrap;
}
.news-arrow {
  font-size: 1rem;
  color: var(--primary);
  transition: var(--transition);
}
.news-item:hover .news-arrow { transform: translateX(4px); color: var(--accent); }
.news-empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--dark-muted);
}
.news-empty .empty-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  stroke: var(--dark-muted);
  fill: none;
  stroke-width: 1.4;
}
.news-empty .empty-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--dark-muted);
}
.news-empty .empty-sub {
  margin-top: 6px;
  font-size: 0.8125rem;
  color: #C0C4C8;
}
.view-all-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.view-all-link .arrow { transition: transform 0.25s ease; }
.view-all-link:hover .arrow { transform: translateX(4px); }

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
  padding-bottom: 80px;
}
.faq-list {
  border-top: 1px solid var(--border-color);
}
.faq-item {
  border-bottom: 1px solid var(--border-color);
}
.accordion-item.faq-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border-color);
}
.accordion-item.faq-item:first-child {
  border-top: 1px solid var(--border-color);
}
.accordion-header {
  background: transparent;
}
.accordion-button.faq-btn {
  background: transparent;
  border: none;
  padding: 22px 48px 22px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--title-color);
  box-shadow: none;
  position: relative;
  width: 100%;
  text-align: left;
  transition: var(--transition);
}
.accordion-button.faq-btn::after {
  display: none;
}
.accordion-button.faq-btn .faq-icon {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  font-size: 1.125rem;
  font-weight: 300;
  color: var(--primary);
  transition: transform 0.25s ease;
  line-height: 1;
}
.accordion-button.faq-btn:not(.collapsed) {
  background: transparent;
  color: var(--primary);
  box-shadow: none;
}
.accordion-button.faq-btn:not(.collapsed) .faq-icon {
  transform: translateY(-50%) rotate(45deg);
  color: var(--accent);
}
.accordion-button.faq-btn:focus {
  box-shadow: none;
  border: none;
}
.accordion-body {
  padding: 0 32px 24px 0;
  font-size: 0.875rem;
  color: var(--muted-color);
  line-height: 1.7;
  background: transparent;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--bg);
  padding-bottom: 96px;
}
.cta-box {
  background: var(--primary-dark);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(120deg, rgba(201,160,108,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.cta-left {
  position: relative;
  z-index: 1;
  flex: 1;
}
.cta-left .cta-title {
  font-size: 1.625rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}
.cta-left .cta-desc {
  margin-top: 12px;
  color: #A0AAB0;
  font-size: 0.875rem;
  max-width: 460px;
  line-height: 1.7;
}
.cta-left .cta-action {
  margin-top: 28px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.cta-notice {
  display: block;
  margin-top: 16px;
  font-size: 0.75rem;
  color: rgba(160,170,176,0.7);
}
.cta-notice a {
  color: var(--accent);
  text-decoration: underline;
  margin-left: 4px;
}
.cta-image {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  width: 300px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.cta-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary-dark);
  padding: 64px 0 32px;
  color: var(--dark-muted);
  flex-shrink: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-brand .footer-logo .brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(201,160,108,0.12);
  border: 1px solid rgba(201,160,108,0.35);
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-brand .footer-site-name {
  font-size: 1.0625rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.02em;
}
.footer-brand .footer-desc {
  margin-top: 20px;
  font-size: 0.8125rem;
  line-height: 1.8;
  max-width: 260px;
  color: #8A959C;
}
.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: #8A959C;
  font-size: 0.8125rem;
  transition: var(--transition);
}
.footer-col ul li a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact li {
  color: #8A959C;
  font-size: 0.8125rem;
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.footer-bottom {
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.75rem;
  color: #5A6A72;
}

/* ===== Modal 表单 ===== */
.modal-content {
  border-radius: 20px;
  padding: 32px 28px;
  border: none;
  box-shadow: var(--shadow-modal);
  background: #fff;
}
.modal-header {
  border: none;
  padding: 0;
  align-items: flex-start;
}
.modal-header .modal-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--title-color);
  line-height: 1.3;
}
.modal-subtitle {
  font-size: 0.8125rem;
  color: var(--muted-color);
  margin-top: 6px;
}
.btn-close-custom {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted-color);
  font-size: 1.25rem;
  border: none;
  background: transparent;
  transition: var(--transition);
  cursor: pointer;
  line-height: 1;
}
.btn-close-custom:hover {
  background: #F0EDE8;
  color: var(--title-color);
}
.modal-body {
  padding: 32px 0 0;
}
.modal-body .form-label {
  font-size: 0.8125rem;
  color: var(--muted-color);
  margin-bottom: 4px;
}
.modal-body .form-control {
  border: none;
  border-bottom: 1px solid #D8D2CA;
  border-radius: 0;
  padding: 10px 4px;
  background: transparent;
  font-size: 0.9375rem;
  color: var(--title-color);
  transition: var(--transition);
}
.modal-body .form-control:focus {
  box-shadow: none;
  border-bottom-color: var(--accent);
  background: transparent;
}
.modal-body .form-control::placeholder {
  color: #C0C4C8;
}
.modal-body textarea.form-control {
  resize: none;
  line-height: 1.6;
}
.modal-body .btn-main {
  width: 100%;
  margin-top: 28px;
}
.modal-footer {
  border: none;
  padding: 16px 0 0;
  justify-content: center;
}
.modal-footer .modal-privacy {
  font-size: 0.75rem;
  color: var(--muted-color);
  text-align: center;
}
.modal-footer .modal-privacy a {
  color: var(--accent);
  text-decoration: underline;
}
.modal.fade .modal-dialog {
  transform: scale(0.96);
  transition: transform 0.25s ease-out;
}
.modal.show .modal-dialog {
  transform: scale(1);
}

/* ===== 滚动显示 ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
  .side-nav {
    width: 100%;
    height: 56px;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    z-index: 1050;
  }
  .side-nav .brand {
    flex-direction: row;
    align-items: center;
    padding: 0;
    gap: 10px;
  }
  .side-nav .brand-name {
    margin-top: 0;
    font-size: 0.9375rem;
    color: #fff;
  }
  .mobile-toggle {
    display: flex;
  }
  .nav-links {
    position: fixed;
    top: 56px;
    left: 0;
    width: 100%;
    height: calc(100vh - 56px);
    background: var(--primary-dark);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 24px 32px;
    margin-top: 0;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
  }
  .nav-links.open {
    transform: translateX(0);
  }
  .nav-link {
    width: 100%;
    height: 56px;
    flex-direction: row;
    justify-content: flex-start;
    gap: 16px;
    font-size: 1.25rem;
    padding: 0 16px;
    color: #fff;
    border-radius: 8px;
  }
  .nav-link svg {
    width: 24px;
    height: 24px;
    stroke: var(--dark-muted);
  }
  .nav-link.active {
    color: #fff;
    border-left: 3px solid var(--accent);
    border-radius: 0;
    background: rgba(201,160,108,0.08);
  }
  .nav-link.active::before {
    display: none;
  }
  .nav-footer {
    display: none;
  }
  .main-wrapper {
    margin-left: 0;
    padding-top: 56px;
  }
  .hero {
    min-height: 80vh;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 0;
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .cta-box {
    flex-direction: column;
    padding: 40px 24px;
  }
  .cta-image {
    width: 100%;
    max-width: 420px;
  }
}

@media (max-width: 767.98px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .section-block {
    padding: 56px 0;
  }
  .pain-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .solution-cards {
    grid-template-columns: 1fr;
  }
  .latest-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .news-item {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px;
  }
  .news-side {
    margin-left: auto;
  }
  .news-info .news-title {
    white-space: nowrap;
  }
  .news-info .news-excerpt {
    -webkit-line-clamp: 2;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .section-title {
    font-size: 1.5rem;
  }
  .hero-content {
    padding-left: 20px;
    padding-right: 20px;
  }
  .hero-subtitle {
    font-size: 0.9375rem;
  }
  .cta-left .cta-title {
    font-size: 1.375rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 4px;
  }
}

@media (max-width: 575.98px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .stat-number {
    font-size: 2rem;
  }
  .news-side .news-tag {
    display: none;
  }
}

/* ===== 减少动效偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* roulang page: article */
:root {
  --primary: #1B3A4B;
  --accent: #C9A06C;
  --accent-light: #D9B98C;
  --page-bg: #F5F2ED;
  --dark-bg: #122730;
  --card-bg: #FFFFFF;
  --heading-color: #1B1B1B;
  --body-color: #2A2A2A;
  --muted-color: #7A8084;
  --light-muted: #A0AAB0;
  --border-color: #E2DCD3;
  --teal: #3D7B6E;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-rest: 0 1px 4px rgba(18, 39, 48, 0.05);
  --shadow-hover: 0 12px 32px rgba(18, 39, 48, 0.10);
  --shadow-modal: 0 24px 48px rgba(18, 39, 48, 0.18);
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--body-color);
  background-color: var(--page-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent);
}

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

ul,
ol {
  list-style: none;
}

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

input,
textarea {
  font-family: inherit;
}

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

/* ===== Left Side Nav ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 80px;
  height: 100vh;
  background: var(--dark-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1040;
  padding: 0;
  transition: transform var(--transition);
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 24px;
  padding-bottom: 28px;
  text-decoration: none;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(201, 160, 108, 0.18);
  border: 1px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.brand-name {
  display: block;
  margin-top: 8px;
  font-size: 11px;
  color: var(--light-muted);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  flex-direction: column;
  width: 100%;
  margin: 24px 0 0;
  padding: 0;
}

.nav-links li {
  width: 100%;
}

.nav-link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 72px;
  width: 100%;
  color: var(--light-muted);
  font-size: 12px;
  transition: color var(--transition);
}

.nav-link svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 1.6;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  margin-bottom: 4px;
}

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

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

.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 28px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}

.nav-link.active svg {
  color: var(--accent);
}

.nav-footer {
  margin-top: auto;
  padding-bottom: 20px;
  font-size: 10px;
  color: #5A6A72;
}

.mobile-toggle {
  display: none;
}

/* ===== Main Content ===== */
.main-content {
  margin-left: 80px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Breadcrumb ===== */
.breadcrumb-nav {
  background: #F0EDE8;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 14px;
  color: var(--muted-color);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb-nav a {
  color: var(--muted-color);
}

.breadcrumb-nav a:hover {
  color: var(--accent);
}

.breadcrumb-nav .sep {
  color: #C0C4C8;
}

.breadcrumb-nav .current {
  color: var(--primary);
  font-weight: 500;
  max-width: 420px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Article Detail ===== */
.article-page {
  max-width: 1060px;
  margin: 0 auto;
  padding: 40px 32px 80px;
  width: 100%;
  flex-grow: 1;
}

.article-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-rest);
  padding: 48px 56px;
}

.article-header {
  margin-bottom: 40px;
}

.article-header h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--heading-color);
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
  color: var(--muted-color);
  margin-bottom: 24px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item svg {
  width: 15px;
  height: 15px;
  stroke: var(--accent);
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.meta-divider {
  color: #D8D2CA;
}

.article-summary {
  border-left: 3px solid #D8D2CA;
  background: rgba(18, 39, 48, 0.02);
  padding: 16px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--muted-color);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ===== Article Content ===== */
.article-content {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--body-color);
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--heading-color);
  margin: 40px 0 16px;
  padding-bottom: 12px;
  position: relative;
}

.article-content h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--heading-color);
  margin: 32px 0 12px;
}

.article-content p {
  margin-bottom: 20px;
  max-width: 720px;
}

.article-content blockquote {
  border-left: 3px solid var(--accent);
  background: rgba(201, 160, 108, 0.06);
  padding: 16px 24px;
  margin: 24px 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--muted-color);
  font-style: normal;
}

.article-content blockquote p {
  margin-bottom: 0;
}

.article-content img {
  border-radius: 12px;
  margin: 28px 0;
  border: 1px solid var(--border-color);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9375rem;
}

.article-content table th,
.article-content table td {
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  text-align: left;
}

.article-content table th {
  background: rgba(18, 39, 48, 0.04);
  font-weight: 600;
  color: var(--heading-color);
}

.article-content table tr:nth-child(even) td {
  background: rgba(18, 39, 48, 0.02);
}

.article-content ul,
.article-content ol {
  margin: 16px 0 20px;
  padding-left: 24px;
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: 8px;
  line-height: 1.8;
}

.article-content a {
  color: var(--primary);
  border-bottom: 1px solid var(--accent);
}

.article-content a:hover {
  color: var(--accent);
}

/* ===== Article Tags ===== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}

.article-tags .tag {
  display: inline-block;
  padding: 5px 14px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--accent);
  transition: all var(--transition);
}

.article-tags .tag:hover {
  background: rgba(201, 160, 108, 0.08);
  border-color: var(--accent);
}

/* ===== Related Posts ===== */
.related-posts {
  margin-top: 48px;
}

.related-posts h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 20px;
  position: relative;
  padding-left: 14px;
}

.related-posts h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  background: var(--accent);
  border-radius: 2px;
}

.related-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  height: 100%;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.related-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.related-card-body {
  padding: 20px 24px;
}

.related-card h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
}

.related-card h4 a {
  color: var(--heading-color);
}

.related-card h4 a:hover {
  color: var(--accent);
}

.related-date {
  font-size: 13px;
  color: var(--muted-color);
}

/* ===== Back Link ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--primary);
  transition: all var(--transition);
}

.back-link svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--transition);
}

.back-link:hover {
  color: var(--accent);
}

.back-link:hover svg {
  transform: translateX(-4px);
}

/* ===== Not Found ===== */
.not-found {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 80px 40px;
  text-align: center;
  box-shadow: var(--shadow-rest);
}

.not-found-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: rgba(18, 39, 48, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
}

.not-found-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--light-muted);
  stroke-width: 1.4;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.not-found h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 12px;
}

.not-found p {
  font-size: 0.9375rem;
  color: var(--muted-color);
  margin-bottom: 28px;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border: none;
}

.btn-primary:hover {
  background: var(--dark-bg);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(18, 39, 48, 0.25);
}

.btn-primary:active {
  transform: translateY(0);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-bg);
  padding: 64px 0 32px;
  margin-left: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .brand-logo {
  margin-bottom: 16px;
}

.footer-site-name {
  display: block;
  font-size: 1.125rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 14px;
  color: var(--light-muted);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.footer-col ul {
  padding: 0;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: #8A959C;
  transition: color var(--transition);
}

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

.footer-contact li {
  font-size: 14px;
  color: #8A959C;
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: #5A6A72;
}

/* ===== Animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .side-nav {
    width: 100%;
    height: 56px;
    flex-direction: row;
    justify-content: space-between;
    padding: 0 20px;
  }

  .brand {
    padding: 0;
    flex-direction: row;
    align-items: center;
    gap: 8px;
  }

  .brand-logo {
    width: 32px;
    height: 32px;
    font-size: 13px;
  }

  .brand-name {
    margin-top: 0;
    font-size: 14px;
    color: #fff;
  }

  .mobile-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    gap: 4px;
  }

  .mobile-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--light-muted);
    border-radius: 2px;
    transition: all var(--transition);
  }

  .mobile-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .mobile-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .mobile-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .nav-links {
    position: fixed;
    top: 56px;
    left: 0;
    width: 100%;
    background: var(--dark-bg);
    flex-direction: column;
    display: none;
    padding: 16px 0;
    box-shadow: 0 12px 32px rgba(18, 39, 48, 0.30);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

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

  .nav-links li {
    width: 100%;
  }

  .nav-link {
    height: 56px;
    flex-direction: row;
    justify-content: center;
    gap: 12px;
    font-size: 1rem;
    color: var(--light-muted);
  }

  .nav-link svg {
    margin-bottom: 0;
  }

  .nav-link.active::before {
    left: 0;
    top: 50%;
    height: 32px;
  }

  .nav-footer {
    display: none;
  }

  .main-content {
    margin-left: 0;
    padding-top: 56px;
  }

  .site-footer {
    margin-left: 0;
  }

  .article-page {
    padding: 24px 16px 56px;
  }

  .article-card {
    padding: 28px 20px;
  }

  .article-summary {
    padding: 12px 16px;
  }

  .breadcrumb-nav {
    font-size: 13px;
    padding: 10px 16px;
  }

  .breadcrumb-nav .current {
    max-width: 220px;
  }

  .container-custom {
    padding: 0 20px;
  }

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

@media (max-width: 520px) {
  .article-meta {
    gap: 8px;
    font-size: 13px;
  }

  .article-header h1 {
    font-size: 1.5rem;
  }

  .related-posts .row > [class*='col-'] {
    margin-bottom: 16px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
    :root {
      --primary: #1B3A4B;
      --primary-dark: #122730;
      --accent: #C9A06C;
      --accent-light: rgba(201, 160, 108, 0.15);
      --bg: #F5F2ED;
      --card-bg: #FFFFFF;
      --heading: #1B1B1B;
      --body: #2A2A2A;
      --muted: #7A8084;
      --muted-light: #A0AAB0;
      --border: #E2DCD3;
      --teal: #3D7B6E;
      --radius-lg: 16px;
      --radius-md: 8px;
      --radius-img: 12px;
      --radius-pill: 999px;
      --shadow-rest: 0 1px 4px rgba(18, 39, 48, 0.05);
      --shadow-hover: 0 12px 32px rgba(18, 39, 48, 0.10);
      --transition: 0.25s ease;
    }

    /* ===== Reset & Base ===== */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      background-color: var(--bg);
      color: var(--body);
      line-height: 1.7;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }
    img {
      max-width: 100%;
      display: block;
    }
    button,
    input,
    textarea {
      font-family: inherit;
    }

    /* ===== 容器 ===== */
    .content-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* ===== 左侧导航 ===== */
    .side-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 80px;
      height: 100vh;
      background: var(--primary-dark);
      z-index: 1050;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 24px 0;
    }
    .brand {
      display: flex;
      flex-direction: column;
      align-items: center;
      margin-bottom: 32px;
    }
    .brand-logo {
      width: 36px;
      height: 36px;
      background: transparent;
      border: 1px solid var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.05em;
      flex-shrink: 0;
    }
    .brand-name {
      margin-top: 8px;
      font-size: 11px;
      color: var(--muted-light);
      letter-spacing: 0.05em;
    }
    .mobile-toggle {
      display: none;
    }
    .nav-links {
      list-style: none;
      padding: 0;
      margin: 0;
      width: 100%;
    }
    .nav-links li {
      width: 100%;
    }
    .nav-link {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      height: 72px;
      color: var(--muted-light);
      font-size: 12px;
      gap: 5px;
      position: relative;
      transition: color var(--transition), background var(--transition);
    }
    .nav-link svg {
      width: 22px;
      height: 22px;
      fill: none;
      stroke: currentColor;
      stroke-width: 1.5;
      stroke-linecap: round;
      stroke-linejoin: round;
    }
    .nav-link:hover,
    .nav-link:focus {
      color: var(--accent);
      background: rgba(255, 255, 255, 0.04);
      outline: none;
    }
    .nav-link.active {
      color: #fff;
    }
    .nav-link.active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 20%;
      height: 60%;
      width: 3px;
      background: var(--accent);
      border-radius: 0 3px 3px 0;
    }
    .nav-link.active svg {
      color: var(--accent);
    }
    .nav-footer {
      margin-top: auto;
      font-size: 10px;
      color: #5A6A72;
      writing-mode: vertical-rl;
      letter-spacing: 0.15em;
    }

    /* ===== 主内容区 ===== */
    .main-content {
      margin-left: 80px;
      overflow: hidden;
    }

    /* ===== 页面 Hero ===== */
    .page-hero {
      background:
        linear-gradient(135deg, rgba(18, 39, 48, 0.92) 0%, rgba(18, 39, 48, 0.68) 50%, rgba(18, 39, 48, 0.40) 100%),
        url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
      padding: 96px 0;
      color: #fff;
    }
    .page-hero h1 {
      font-size: clamp(2rem, 4vw, 2.75rem);
      font-weight: 300;
      letter-spacing: 0.02em;
      margin-bottom: 24px;
      position: relative;
      padding-bottom: 20px;
      line-height: 1.3;
    }
    .page-hero h1::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 40px;
      height: 2px;
      background: var(--accent);
    }
    .page-hero .hero-desc {
      max-width: 620px;
      font-size: 16px;
      line-height: 1.7;
      color: #C8D0D4;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      gap: 20px;
      flex-wrap: wrap;
    }

    /* ===== 按钮 ===== */
    .btn-primary-custom {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary);
      color: #fff;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-md);
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    }
    .btn-primary-custom:hover,
    .btn-primary-custom:focus {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(18, 39, 48, 0.25);
      color: #fff;
      outline: none;
    }
    .btn-primary-custom:active {
      transform: translateY(0);
    }
    .btn-accent-custom {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--accent);
      color: #fff;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-md);
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    }
    .btn-accent-custom:hover,
    .btn-accent-custom:focus {
      background: #fff;
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(201, 160, 108, 0.35);
      outline: none;
    }
    .btn-accent-custom:active {
      transform: translateY(0);
    }
    .btn-text {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
      font-size: 14px;
      font-weight: 500;
      background: none;
      border: none;
      padding: 0;
      cursor: pointer;
      transition: color var(--transition), gap var(--transition);
    }
    .btn-text:hover {
      color: var(--accent);
      gap: 10px;
    }
    .hero-link {
      color: #C8D0D4;
      font-size: 14px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.3);
      padding-bottom: 2px;
      transition: color var(--transition), border-color var(--transition);
    }
    .hero-link:hover {
      color: var(--accent);
      border-color: var(--accent);
    }

    /* ===== Section 通用 ===== */
    .section {
      padding: 80px 0;
    }
    .section-hidden {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.5s ease, transform 0.5s ease;
    }
    .section-visible {
      opacity: 1;
      transform: translateY(0);
    }
    .section-head {
      margin-bottom: 48px;
    }
    .section-title {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--heading);
      letter-spacing: 0.01em;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
      line-height: 1.3;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -10px;
      width: 40px;
      height: 2px;
      background: var(--accent);
    }
    .section-desc {
      font-size: 14px;
      color: var(--muted);
      max-width: 620px;
      margin-top: 20px;
      line-height: 1.7;
    }

    /* ===== 下载准备卡片 ===== */
    .card-item {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
      height: 100%;
    }
    .card-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }
    .card-icon {
      width: 40px;
      height: 40px;
      margin-bottom: 16px;
    }
    .card-icon svg {
      width: 32px;
      height: 32px;
      fill: none;
      stroke: var(--accent);
      stroke-width: 1.5;
      stroke-linecap: round;
      stroke-linejoin: round;
    }
    .card-title {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--heading);
      margin-bottom: 10px;
    }
    .card-desc {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.7;
      margin-bottom: 0;
    }

    /* ===== 步骤时间线 ===== */
    .steps-section {
      background: var(--card-bg);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .step-item {
      display: flex;
      gap: 20px;
      position: relative;
      padding-bottom: 36px;
    }
    .step-item::before {
      content: '';
      position: absolute;
      left: 23px;
      top: 52px;
      width: 1px;
      height: calc(100% - 52px);
      background: var(--border);
    }
    .step-item:last-child::before {
      display: none;
    }
    .step-num {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: 1px solid var(--accent);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      font-weight: 600;
      flex-shrink: 0;
      background: var(--card-bg);
      font-variant-numeric: tabular-nums;
    }
    .step-content {
      padding-top: 4px;
    }
    .step-content h3 {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--heading);
      margin-bottom: 6px;
    }
    .step-content p {
      font-size: 14px;
      color: var(--muted);
      margin-bottom: 0;
      line-height: 1.7;
    }

    /* ===== 版本选择 ===== */
    .version-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
      height: 100%;
    }
    .version-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }
    .version-card .cover {
      height: 180px;
      overflow: hidden;
      background: var(--primary);
    }
    .version-card .cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.88;
      transition: transform 0.4s ease, opacity 0.4s ease;
    }
    .version-card:hover .cover img {
      transform: scale(1.05);
      opacity: 1;
    }
    .version-card-body {
      padding: 24px;
    }
    .version-card-body h3 {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--heading);
      margin-bottom: 10px;
    }
    .version-card-body p {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .version-tag {
      display: inline-block;
      padding: 4px 12px;
      border: 1px solid var(--accent);
      color: var(--accent);
      font-size: 12px;
      border-radius: var(--radius-pill);
      background: transparent;
      letter-spacing: 0.02em;
    }

    /* ===== 安全保障 ===== */
    .security-section {
      background: var(--primary-dark);
      padding: 64px 0;
    }
    .security-section .section-title {
      color: #fff;
    }
    .security-section .section-desc {
      color: var(--muted-light);
    }
    .security-item {
      padding: 24px;
      border: 1px solid rgba(255, 255, 255, 0.10);
      border-radius: var(--radius-lg);
      width: 100%;
      transition: border-color var(--transition), background var(--transition);
    }
    .security-item:hover {
      border-color: rgba(201, 160, 108, 0.4);
      background: rgba(255, 255, 255, 0.03);
    }
    .security-item h3 {
      color: var(--accent);
      font-size: 1.125rem;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .security-item p {
      color: #A0AAB0;
      font-size: 14px;
      line-height: 1.7;
      margin-bottom: 0;
    }
    .security-grid .col {
      display: flex;
    }

    /* ===== FAQ ===== */
    .faq-section {
      background: var(--card-bg);
    }
    .accordion {
      max-width: 800px;
    }
    .accordion-item {
      background: transparent;
      border: none;
      border-top: 1px solid var(--border);
      border-radius: 0 !important;
    }
    .accordion-item:last-child {
      border-bottom: 1px solid var(--border);
    }
    .accordion-button {
      background: transparent;
      color: var(--heading);
      font-size: 16px;
      font-weight: 600;
      padding: 20px 48px 20px 0;
      box-shadow: none;
      border-radius: 0 !important;
      position: relative;
    }
    .accordion-button::after {
      content: '+';
      background-image: none !important;
      width: auto;
      height: auto;
      font-size: 22px;
      font-weight: 400;
      color: var(--muted);
      transition: transform 0.25s ease, color 0.25s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      position: absolute;
      right: 8px;
      top: 50%;
      transform: translateY(-50%);
    }
    .accordion-button:not(.collapsed) {
      color: var(--primary);
      background: transparent;
      box-shadow: none;
    }
    .accordion-button:not(.collapsed)::after {
      transform: translateY(-50%) rotate(45deg);
      color: var(--accent);
    }
    .accordion-button:focus {
      box-shadow: none;
      outline: 1px solid var(--accent);
      outline-offset: -1px;
    }
    .accordion-body {
      padding: 0 48px 20px 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: 80px 0;
      text-align: center;
    }
    .cta-section .section-title {
      display: block;
      text-align: center;
    }
    .cta-section .section-title::after {
      left: 50%;
      transform: translateX(-50%);
    }
    .cta-section .cta-desc {
      max-width: 480px;
      margin: 20px auto 32px;
      color: var(--muted);
      font-size: 14px;
    }
    .cta-privacy {
      margin-top: 16px;
      font-size: 12px;
      color: var(--muted-light);
    }
    .cta-privacy a {
      color: var(--primary);
      border-bottom: 1px solid var(--border);
      padding-bottom: 1px;
    }
    .cta-privacy a:hover {
      color: var(--accent);
      border-color: var(--accent);
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--primary-dark);
      padding: 64px 0 32px;
      margin-left: 80px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      margin-bottom: 24px;
    }
    .footer-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }
    .footer-site-name {
      color: #fff;
      font-size: 15px;
      font-weight: 600;
    }
    .footer-desc {
      font-size: 14px;
      color: var(--muted-light);
      line-height: 1.7;
      max-width: 320px;
      margin-bottom: 0;
    }
    .footer-col h4 {
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 16px;
      letter-spacing: 0.03em;
    }
    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul a {
      color: #8A959C;
      font-size: 14px;
      transition: color var(--transition);
    }
    .footer-col ul a:hover {
      color: var(--accent);
    }
    .footer-contact li {
      color: #8A959C;
      font-size: 13px;
      line-height: 1.6;
    }
    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 12px;
      color: #5A6A72;
      font-size: 12px;
    }

    /* ===== Modal 表单 ===== */
    .modal-content {
      border-radius: 20px;
      border: none;
      box-shadow: var(--shadow-hover);
      padding: 8px;
    }
    .modal-header {
      border: none;
      padding: 24px 24px 0;
      position: relative;
    }
    .modal-title {
      font-size: 24px;
      font-weight: 600;
      color: var(--heading);
    }
    .modal-subtitle {
      font-size: 14px;
      color: var(--muted);
      margin-bottom: 0;
      margin-top: 4px;
    }
    .modal-body {
      padding: 24px;
    }
    .modal-footer {
      border: none;
      padding: 0 24px 24px;
      justify-content: center;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      font-size: 12px;
      color: var(--muted);
      display: block;
      margin-bottom: 4px;
    }
    .form-control-custom {
      width: 100%;
      border: none;
      border-bottom: 1px solid #D8D2CA;
      padding: 10px 4px;
      font-size: 14px;
      background: transparent;
      color: var(--heading);
      outline: none;
      border-radius: 0;
      transition: border-color var(--transition);
    }
    .form-control-custom:focus {
      border-bottom-color: var(--accent);
      box-shadow: none;
    }
    textarea.form-control-custom {
      resize: vertical;
      min-height: 80px;
    }
    .btn-close-custom {
      position: absolute;
      right: 24px;
      top: 24px;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: none;
      background: transparent;
      color: var(--muted);
      font-size: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: background var(--transition), color var(--transition);
      z-index: 1;
    }
    .btn-close-custom:hover {
      background: var(--bg);
      color: var(--heading);
    }
    .btn-block {
      width: 100%;
    }
    .modal-privacy {
      font-size: 12px;
      color: var(--muted-light);
      text-align: center;
      margin-top: 12px;
    }
    .modal-privacy a {
      color: var(--primary);
      border-bottom: 1px solid var(--border);
      padding-bottom: 1px;
    }
    .modal-privacy a:hover {
      color: var(--accent);
      border-color: var(--accent);
    }

    /* ===== 响应式断点 ===== */
    @media (max-width: 991px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
    }

    @media (max-width: 768px) {
      .side-nav {
        width: 100%;
        height: 48px;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 0 16px;
      }
      .brand {
        flex-direction: row;
        margin-bottom: 0;
        gap: 8px;
      }
      .brand-logo {
        width: 30px;
        height: 30px;
        font-size: 11px;
      }
      .brand-name {
        margin-top: 0;
        font-size: 12px;
        color: #fff;
      }
      .mobile-toggle {
        display: flex;
        flex-direction: column;
        gap: 4px;
        background: none;
        border: none;
        padding: 8px;
        cursor: pointer;
      }
      .mobile-toggle span {
        display: block;
        width: 20px;
        height: 2px;
        background: var(--muted-light);
        transition: background var(--transition);
      }
      .mobile-toggle:hover span {
        background: var(--accent);
      }
      .nav-links {
        display: none;
        position: fixed;
        top: 48px;
        left: 0;
        width: 100%;
        background: var(--primary-dark);
        flex-direction: column;
        padding: 8px 0 16px;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-link {
        flex-direction: row;
        justify-content: flex-start;
        height: 56px;
        padding: 0 32px;
        gap: 14px;
        font-size: 15px;
      }
      .nav-link.active::before {
        left: 0;
        top: 15%;
        height: 70%;
        width: 3px;
      }
      .nav-footer {
        display: none;
      }
      .main-content,
      .site-footer {
        margin-left: 0;
      }
      .main-content {
        padding-top: 48px;
      }
      .content-container {
        padding: 0 20px;
      }
      .page-hero {
        padding: 64px 0;
      }
      .section {
        padding: 56px 0;
      }
      .section-head {
        margin-bottom: 32px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: center;
      }
    }

    @media (max-width: 520px) {
      .hero-actions {
        flex-direction: column;
        align-items: flex-start;
      }
      .page-hero h1 {
        font-size: 1.75rem;
      }
      .section-title {
        font-size: 1.4rem;
      }
      .step-item {
        gap: 14px;
      }
      .step-num {
        width: 40px;
        height: 40px;
        font-size: 14px;
      }
      .step-item::before {
        left: 19px;
      }
      .security-item {
        padding: 20px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
      }
    }

/* roulang page: category2 */
:root {
      --primary: #1B3A4B;
      --primary-dark: #122730;
      --accent: #C9A06C;
      --bg: #F5F2ED;
      --dark: #122730;
      --white: #FFFFFF;
      --title-color: #1B1B1B;
      --text-color: #2A2A2A;
      --muted: #7A8084;
      --border: #E2DCD3;
      --green: #3D7B6E;
      --radius-lg: 16px;
      --radius-md: 8px;
      --radius-sm: 12px;
      --shadow-rest: 0 1px 4px rgba(18,39,48,0.05);
      --shadow-hover: 0 12px 32px rgba(18,39,48,0.10);
      --shadow-modal: 0 24px 48px rgba(18,39,48,0.18);
      --transition: 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      background: var(--bg);
      color: var(--text-color);
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.25s ease;
    }

    a:hover {
      color: var(--accent);
    }

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

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

    @media (max-width: 767.98px) {
      .content-container {
        padding: 0 20px;
      }
    }

    /* ===== 左侧竖向导航（桌面端） ===== */
    .side-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 80px;
      height: 100vh;
      background: var(--dark);
      z-index: 1040;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 0 0 16px;
    }

    .side-nav .brand {
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 20px 0 18px;
      text-decoration: none;
    }

    .brand-logo {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      border: 1px solid rgba(201, 160, 108, 0.7);
      color: var(--accent);
      font-size: 14px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.02em;
    }

    .brand-name {
      font-size: 11px;
      color: #A0AAB0;
      margin-top: 8px;
    }

    .nav-links {
      list-style: none;
      padding: 0;
      margin: 24px 0 0;
      width: 100%;
    }

    .nav-links li {
      position: relative;
    }

    .nav-links .nav-link {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      height: 72px;
      color: #A0AAB0;
      text-decoration: none;
      font-size: 12px;
      transition: color 0.25s ease;
    }

    .nav-links .nav-link svg {
      width: 24px;
      height: 24px;
      fill: none;
      stroke: currentColor;
      stroke-width: 1.8;
      stroke-linecap: round;
      stroke-linejoin: round;
      margin-bottom: 4px;
    }

    .nav-links .nav-link:hover {
      color: var(--accent);
    }

    .nav-links .nav-link.active {
      color: #FFFFFF;
    }

    .nav-links .nav-link.active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 32px;
      background: var(--accent);
      border-radius: 0 3px 3px 0;
    }

    .nav-links .nav-link.active svg {
      color: var(--accent);
    }

    .nav-footer {
      margin-top: auto;
      font-size: 10px;
      color: #5A6A72;
      padding-bottom: 8px;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      padding: 8px;
      cursor: pointer;
      flex-direction: column;
      gap: 4px;
    }

    .mobile-toggle span {
      width: 20px;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
      transition: transform 0.25s ease, opacity 0.25s ease;
    }

    .mobile-toggle.active span:nth-child(1) {
      transform: translateY(6px) rotate(45deg);
    }

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

    .mobile-toggle.active span:nth-child(3) {
      transform: translateY(-6px) rotate(-45deg);
    }

    /* ===== 主内容区 ===== */
    .main-content {
      margin-left: 80px;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    .main-content>main {
      flex: 1;
    }

    /* ===== 分类页 Hero ===== */
    .category-hero {
      position: relative;
      padding: 88px 0 72px;
      background: url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
      overflow: hidden;
    }

    .category-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(18, 39, 48, 0.94) 0%, rgba(18, 39, 48, 0.72) 55%, rgba(18, 39, 48, 0.38) 100%);
    }

    .category-hero .content-container {
      position: relative;
      z-index: 1;
    }

    .hero-tag {
      display: inline-block;
      padding: 4px 14px;
      border: 1px solid rgba(201, 160, 108, 0.5);
      color: var(--accent);
      border-radius: 999px;
      font-size: 13px;
      letter-spacing: 0.04em;
      margin-bottom: 20px;
    }

    .category-hero h1 {
      color: #FFFFFF;
      font-size: clamp(2rem, 4vw, 3rem);
      font-weight: 300;
      line-height: 1.2;
      letter-spacing: 0.02em;
      margin-bottom: 16px;
      max-width: 720px;
    }

    .category-hero h1::after {
      content: '';
      display: block;
      width: 40px;
      height: 2px;
      background: var(--accent);
      margin-top: 16px;
    }

    .category-hero .hero-desc {
      max-width: 620px;
      color: #C8D0D4;
      font-size: 16px;
      line-height: 1.7;
      margin-bottom: 32px;
    }

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

    .btn-primary-custom {
      display: inline-block;
      background: var(--primary);
      color: #FFFFFF;
      padding: 12px 28px;
      border-radius: 8px;
      font-size: 15px;
      font-weight: 500;
      text-decoration: none;
      border: 1px solid transparent;
      transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease, color 0.25s ease;
    }

    .btn-primary-custom:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(18, 39, 48, 0.25);
      color: #FFFFFF;
    }

    .btn-primary-custom:active {
      transform: translateY(0);
    }

    .btn-primary-custom:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

    .btn-outline-custom {
      display: inline-block;
      background: transparent;
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.6);
      padding: 12px 28px;
      border-radius: 8px;
      font-size: 15px;
      text-decoration: none;
      transition: border-color 0.25s ease, color 0.25s ease, transform 0.25s ease;
    }

    .btn-outline-custom:hover {
      border-color: var(--accent);
      color: var(--accent);
      transform: translateY(-2px);
    }

    .btn-outline-custom:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

    .text-link-custom {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
      font-weight: 500;
      text-decoration: none;
      transition: gap 0.25s ease, color 0.25s ease;
    }

    .text-link-custom:hover {
      gap: 10px;
      color: var(--accent);
    }

    .text-link-light {
      color: #C8D0D4;
    }

    .text-link-light:hover {
      color: var(--accent);
    }

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

    .section-gray {
      background: #ECE9E4;
    }

    .section-heading {
      margin-bottom: 40px;
    }

    .section-heading h2 {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--title-color);
      line-height: 1.3;
      letter-spacing: 0.01em;
      margin-bottom: 12px;
    }

    .section-heading .heading-line {
      width: 40px;
      height: 2px;
      background: var(--accent);
      margin-bottom: 16px;
    }

    .section-heading p {
      max-width: 620px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.7;
      margin-bottom: 0;
    }

    @media (max-width: 767.98px) {
      .section {
        padding: 48px 0;
      }
    }

    /* ===== 登录流程步骤 ===== */
    .step-card {
      text-align: center;
      padding: 32px 24px;
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      height: 100%;
    }

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

    .step-num {
      font-size: 3rem;
      font-weight: 700;
      color: rgba(201, 160, 108, 0.3);
      line-height: 1;
      margin-bottom: 16px;
      font-feature-settings: "tnum";
    }

    .step-card h3 {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--title-color);
      margin-bottom: 10px;
    }

    .step-card p {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.7;
      margin-bottom: 0;
    }

    /* ===== 登录方式卡片 ===== */
    .feature-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      height: 100%;
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: var(--accent);
      box-shadow: var(--shadow-hover);
    }

    .feature-card .card-icon {
      width: 48px;
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1.5px solid var(--accent);
      border-radius: 12px;
      margin-bottom: 20px;
      color: var(--accent);
    }

    .feature-card .card-icon svg {
      width: 24px;
      height: 24px;
      fill: none;
      stroke: currentColor;
      stroke-width: 1.8;
    }

    .feature-card h3 {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--title-color);
      margin-bottom: 12px;
    }

    .feature-card p {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.7;
      margin-bottom: 0;
    }

    /* ===== 自助服务图文卡片 ===== */
    .service-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .service-card .card-cover {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      display: block;
    }

    .service-card-body {
      padding: 20px 20px 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .service-card-body h3 {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--title-color);
      margin-bottom: 10px;
    }

    .service-card-body p {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.7;
      flex: 1;
      margin-bottom: 16px;
    }

    /* ===== 适用场景 ===== */
    .scenario-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px;
      height: 100%;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .scenario-item:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }

    .scenario-item .scenario-icon {
      width: 40px;
      height: 40px;
      flex-shrink: 0;
      border-radius: 10px;
      background: rgba(201, 160, 108, 0.10);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
    }

    .scenario-item .scenario-icon svg {
      width: 20px;
      height: 20px;
      fill: none;
      stroke: currentColor;
      stroke-width: 1.8;
    }

    .scenario-item h3 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--title-color);
      margin-bottom: 6px;
    }

    .scenario-item p {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.6;
      margin-bottom: 0;
    }

    /* ===== 信任数据条 ===== */
    .trust-strip {
      background: var(--dark);
      padding: 48px 0;
    }

    .trust-strip .trust-item {
      text-align: center;
      padding: 8px 0;
      position: relative;
    }

    .trust-strip .trust-item + .trust-item::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 1px;
      height: 40px;
      background: rgba(255, 255, 255, 0.15);
    }

    .trust-strip .trust-num {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
      font-feature-settings: "tnum";
    }

    .trust-strip .trust-label {
      font-size: 0.875rem;
      color: #A0AAB0;
      letter-spacing: 0.08em;
      margin-top: 6px;
    }

    /* ===== FAQ ===== */
    .faq-accordion {
      border-top: 1px solid var(--border);
    }

    .accordion-item {
      background: transparent;
      border: none;
      border-bottom: 1px solid var(--border);
      border-radius: 0 !important;
    }

    .accordion-button {
      background: transparent;
      color: var(--title-color);
      font-size: 16px;
      font-weight: 600;
      padding: 20px 0;
      box-shadow: none !important;
      position: relative;
      transition: color 0.25s ease;
    }

    .accordion-button:hover {
      color: var(--primary);
    }

    .accordion-button:not(.collapsed) {
      color: var(--primary);
      background: transparent;
    }

    .accordion-button::after {
      background: none;
      content: '+';
      font-size: 22px;
      font-weight: 300;
      color: var(--primary);
      transform: none;
      width: auto;
      height: auto;
      transition: transform 0.25s ease;
    }

    .accordion-button:not(.collapsed)::after {
      content: '×';
      transform: none;
    }

    .accordion-body {
      padding: 0 0 20px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-section {
      background: var(--dark);
      padding: 72px 0;
      text-align: center;
    }

    .cta-section h2 {
      color: #FFFFFF;
      font-size: 1.75rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .cta-section p {
      color: #A0AAB0;
      max-width: 480px;
      margin: 0 auto 32px;
      font-size: 15px;
      line-height: 1.7;
    }

    .privacy-note {
      font-size: 12px;
      color: #5A6A72;
      margin-top: 16px;
    }

    .privacy-note a {
      color: #8A959C;
      text-decoration: none;
    }

    .privacy-note a:hover {
      color: var(--accent);
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--dark);
      padding: 64px 0 32px;
      color: #A0AAB0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-brand {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .footer-logo {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .footer-site-name {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 600;
    }

    .footer-desc {
      font-size: 14px;
      line-height: 1.7;
      color: #A0AAB0;
      max-width: 320px;
      margin: 0;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul li {
      font-size: 14px;
      color: #8A959C;
      line-height: 1.5;
    }

    .footer-col ul li a {
      color: #8A959C;
      text-decoration: none;
      transition: color 0.25s ease;
    }

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

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 24px;
      font-size: 12px;
      color: #5A6A72;
    }

    @media (max-width: 767.98px) {
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }

    /* ===== 滚动显示动画 ===== */
    .reveal {
      opacity: 1;
    }

    @media (prefers-reduced-motion: no-preference) {
      .reveal {
        opacity: 0;
        transform: translateY(16px);
        transition: opacity 0.5s ease, transform 0.5s ease;
      }
      .reveal.visible {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
      }
      html {
        scroll-behavior: auto;
      }
    }

    /* ===== 移动端导航断点 ===== */
    @media (max-width: 991.98px) {
      .side-nav {
        width: 100%;
        height: 56px;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 0 16px;
      }

      .side-nav .brand {
        flex-direction: row;
        gap: 8px;
        padding: 0;
      }

      .brand-logo {
        width: 32px;
        height: 32px;
        font-size: 12px;
      }

      .brand-name {
        margin-top: 0;
        font-size: 14px;
        color: #FFFFFF;
      }

      .nav-footer {
        display: none;
      }

      .mobile-toggle {
        display: flex;
      }

      .nav-links {
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: var(--dark);
        flex-direction: column;
        margin: 0;
        padding: 8px 0;
        display: none;
        box-shadow: 0 16px 32px rgba(0, 0, 0, 0.2);
      }

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

      .nav-links .nav-link {
        flex-direction: row;
        justify-content: flex-start;
        gap: 12px;
        padding: 0 24px;
        height: 56px;
        font-size: 16px;
      }

      .nav-links .nav-link svg {
        margin-bottom: 0;
      }

      .nav-link.active::before {
        left: 0;
        top: 0;
        transform: none;
        height: 100%;
        width: 3px;
      }

      .main-content {
        margin-left: 0;
        padding-top: 56px;
      }
    }

    @media (max-width: 767.98px) {
      .category-hero {
        padding: 56px 0 48px;
      }
      .hero-actions {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
      }
      .trust-strip .trust-item + .trust-item::before {
        display: none;
      }
      .trust-strip .trust-item {
        margin-bottom: 16px;
      }
    }

/* roulang page: category3 */
:root {
  --primary: #1B3A4B;
  --accent: #C9A06C;
  --accent-2: #3D7B6E;
  --bg: #F5F2ED;
  --dark: #122730;
  --card: #FFFFFF;
  --title: #1B1B1B;
  --text: #2A2A2A;
  --muted: #7A8084;
  --border: #E2DCD3;
  --radius-lg: 16px;
  --radius-md: 8px;
  --radius-sm: 12px;
  --shadow-rest: 0 1px 4px rgba(18,39,48,0.05);
  --shadow-hover: 0 12px 32px rgba(18,39,48,0.10);
  --transition: all .25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

a:hover {
  color: var(--accent);
}

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

button,
input,
textarea {
  font-family: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ===== 左侧竖向导航 ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 80px;
  height: 100vh;
  background: var(--dark);
  z-index: 1040;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0 16px;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.side-nav .brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 28px;
  gap: 6px;
}

.side-nav .brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: transparent;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: background .25s ease, color .25s ease;
}

.side-nav .brand:hover .brand-logo {
  background: var(--accent);
  color: var(--dark);
}

.side-nav .brand-name {
  font-size: 11px;
  color: #A0AAB0;
  letter-spacing: 0.08em;
}

.side-nav .nav-links {
  list-style: none;
  width: 100%;
  margin: 0;
  padding: 0;
  flex: 1;
}

.side-nav .nav-links li {
  width: 100%;
}

.side-nav .nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 72px;
  color: #A0AAB0;
  font-size: 12px;
  position: relative;
  gap: 4px;
  transition: color .25s ease, background .25s ease;
}

.side-nav .nav-link svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.side-nav .nav-link:hover {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.04);
}

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

.side-nav .nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 26px;
  border-radius: 0 3px 3px 0;
  background: var(--accent);
}

.side-nav .nav-link.active svg {
  stroke: var(--accent);
}

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

.nav-footer {
  color: #5A6A72;
  font-size: 10px;
  padding-bottom: 8px;
  letter-spacing: 0.05em;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

/* ===== 主内容区 ===== */
.main-wrapper {
  margin-left: 80px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  width: calc(100% - 80px);
}

.main-content {
  flex: 1;
}

.content-container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
}

/* ===== Hero / 分类头图 ===== */
.category-hero {
  position: relative;
  background: linear-gradient(135deg, #122730 0%, rgba(18, 39, 48, 0.72) 45%, rgba(18, 39, 48, 0.30) 100%), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  padding: 104px 0 76px;
  color: #fff;
  margin-bottom: 0;
}

.category-hero::after {
  content: '';
  position: absolute;
  right: 8%;
  bottom: 20px;
  width: 180px;
  height: 180px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 120' fill='none' stroke='%23ffffff' stroke-width='0.6' opacity='0.14'%3E%3Ccircle cx='60' cy='60' r='45'/%3E%3Ccircle cx='60' cy='60' r='30'/%3E%3Ccircle cx='60' cy='60' r='15'/%3E%3Cpath d='M60 5v15M60 100v15M5 60h15M100 60h15'/%3E%3C/svg%3E") center center / contain no-repeat;
  pointer-events: none;
}

.hero-crumb {
  font-size: 13px;
  color: #C8D0D4;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.hero-crumb a {
  color: #C8D0D4;
}

.hero-crumb a:hover {
  color: var(--accent);
}

.hero-crumb .sep {
  margin: 0 8px;
  color: #5A6A72;
}

.category-hero h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: #fff;
  margin-bottom: 20px;
  max-width: 720px;
}

.hero-underline {
  width: 48px;
  height: 2px;
  background: var(--accent);
  margin-bottom: 24px;
}

.category-hero .hero-desc {
  font-size: 16px;
  line-height: 1.7;
  color: #C8D0D4;
  max-width: 620px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

/* ===== 按钮体系 ===== */
.btn-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary);
  font-size: 15px;
  font-weight: 500;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background .25s ease, transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.btn-brand:hover {
  background: var(--dark);
  border-color: var(--dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(18, 39, 48, 0.25);
}

.btn-brand:active {
  transform: translateY(0);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  font-size: 15px;
  font-weight: 500;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all .25s ease;
}

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

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  transition: color .25s ease;
}

.btn-text .arrow {
  transition: transform .25s ease;
  display: inline-block;
}

.btn-text:hover {
  color: var(--accent);
}

.btn-text:hover .arrow {
  transform: translateX(4px);
}

/* ===== 通用板块 ===== */
.section {
  padding: 76px 0;
}

.section-white {
  background: #fff;
}

.section-head {
  margin-bottom: 44px;
}

.section-head h2 {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--title);
  margin-bottom: 12px;
}

.section-head .section-line {
  width: 40px;
  height: 2px;
  background: var(--accent);
  margin-bottom: 16px;
}

.section-head .section-desc {
  font-size: 14px;
  color: var(--muted);
  max-width: 620px;
  line-height: 1.7;
}

/* ===== 核心卖点卡片 ===== */
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px 28px;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border: 1.5px solid var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 18px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--title);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  transition: color .25s ease;
}

.feature-link span {
  display: inline-block;
  transition: transform .25s ease;
}

.feature-link:hover {
  color: var(--accent);
}

.feature-link:hover span {
  transform: translateX(4px);
}

/* ===== 适用场景 ===== */
.scenario-item {
  display: flex;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: background .25s ease;
}

.scenario-item:first-child {
  padding-top: 0;
}

.scenario-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.scenario-item:hover {
  background: rgba(201, 160, 108, 0.06);
  padding-left: 12px;
  padding-right: 12px;
  border-radius: var(--radius-md);
}

.scenario-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.3;
  line-height: 1.2;
  font-feature-settings: 'tnum';
  min-width: 44px;
  margin-top: 4px;
}

.scenario-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 6px;
}

.scenario-item p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.scenario-img {
  border-radius: var(--radius-lg);
  object-fit: cover;
  width: 100%;
  height: 380px;
  box-shadow: var(--shadow-rest);
  transition: box-shadow .25s ease;
}

.scenario-img:hover {
  box-shadow: var(--shadow-hover);
}

/* ===== 登录流程 ===== */
.process-section {
  background: var(--bg);
  position: relative;
}

.process-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  height: 100%;
  position: relative;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.process-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.step-number {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.4;
  display: block;
  margin-bottom: 16px;
  font-feature-settings: 'tnum';
}

.process-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 10px;
}

.process-item p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.process-step-note {
  text-align: center;
  margin-top: 32px;
  font-size: 13px;
  color: var(--muted);
}

/* ===== 数据区 ===== */
.stats-section {
  background: var(--dark);
  color: #fff;
  padding: 72px 0;
  position: relative;
}

.stats-section .section-line {
  background: var(--accent);
}

.stats-section .section-head h2 {
  color: #fff;
}

.stats-section .section-desc {
  color: #A0AAB0;
}

.stat-item {
  text-align: center;
  padding: 16px 8px;
}

.stat-number {
  color: var(--accent);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.3;
  font-feature-settings: 'tnum';
}

.stat-label {
  color: #A0AAB0;
  font-size: 13px;
  letter-spacing: 0.08em;
  margin-top: 8px;
}

@media (min-width: 992px) {
  .stats-section .col-lg-3 + .col-lg-3 .stat-item {
    border-left: 1px solid rgba(255, 255, 255, 0.12);
  }
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 820px;
}

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

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 22px 4px;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--title);
  cursor: pointer;
  transition: color .25s ease;
}

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

.faq-question[aria-expanded="true"] {
  color: var(--primary);
}

.faq-icon {
  font-size: 24px;
  font-weight: 300;
  line-height: 1;
  color: var(--accent);
  transition: transform .25s ease;
  flex-shrink: 0;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 4px 22px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0 96px;
  text-align: center;
}

.cta-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  max-width: 760px;
  margin: 0 auto;
  box-shadow: var(--shadow-rest);
}

.cta-box h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 14px;
}

.cta-box p {
  font-size: 15px;
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.cta-note {
  font-size: 12px;
  color: #A0AAB0;
  margin-top: 8px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark);
  color: #A0AAB0;
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.site-footer .container {
  max-width: 1220px;
  padding: 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 24px;
}

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

.footer-logo .brand-logo {
  width: 30px;
  height: 30px;
  font-size: 11px;
  border-width: 1.5px;
}

.footer-site-name {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.02em;
}

.footer-desc {
  font-size: 14px;
  color: #A0AAB0;
  line-height: 1.7;
  max-width: 320px;
  margin-bottom: 0;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col ul li {
  margin-bottom: 10px;
  font-size: 13px;
  color: #8A959C;
}

.footer-col ul li a {
  color: #8A959C;
  font-size: 13px;
  transition: color .25s ease;
}

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

.footer-contact li {
  color: #8A959C;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: #5A6A72;
}

/* ===== 响应式 ===== */
@media (max-width: 991px) {
  .feature-card {
    padding: 26px 22px;
  }

  .scenario-item {
    padding: 18px 0;
  }

  .scenario-img {
    height: 320px;
  }

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

@media (max-width: 768px) {
  .side-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 48px;
    flex-direction: row;
    align-items: center;
    padding: 0 16px;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 1050;
  }

  .side-nav .brand {
    flex-direction: row;
    margin-bottom: 0;
    gap: 8px;
  }

  .side-nav .brand-logo {
    width: 28px;
    height: 28px;
    font-size: 10px;
  }

  .side-nav .brand-name {
    font-size: 12px;
    color: #fff;
    letter-spacing: 0.06em;
  }

  .mobile-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-left: auto;
    background: transparent;
    border: none;
    padding: 8px;
  }

  .mobile-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform .25s ease, opacity .25s ease;
  }

  .side-nav .nav-links {
    position: fixed;
    top: 48px;
    left: 0;
    width: 100%;
    background: var(--dark);
    flex-direction: column;
    padding: 8px 0 16px;
    display: none;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.3);
  }

  .side-nav .nav-links.show {
    display: flex;
  }

  .side-nav .nav-link {
    flex-direction: row;
    justify-content: flex-start;
    height: 52px;
    padding: 0 24px;
    gap: 14px;
    font-size: 15px;
  }

  .side-nav .nav-link.active::before {
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
  }

  .nav-footer {
    display: none;
  }

  .main-wrapper {
    margin-left: 0;
    width: 100%;
    padding-top: 48px;
  }

  .content-container {
    padding: 0 20px;
  }

  .site-footer .container {
    padding: 0 20px;
  }

  .category-hero {
    padding: 64px 0 56px;
  }

  .section {
    padding: 50px 0;
  }

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

  .section-head h2 {
    font-size: 1.5rem;
  }

  .scenario-img {
    height: 260px;
    margin-top: 8px;
  }

  .cta-section {
    padding: 56px 0 72px;
  }

  .cta-box {
    padding: 40px 24px;
  }

  .stats-section {
    padding: 56px 0;
  }

  .stat-number {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 28px;
  }

  .footer-desc {
    max-width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 6px;
    padding-top: 8px;
  }
}

@media (max-width: 575px) {
  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .hero-actions .btn-brand,
  .hero-actions .btn-text {
    width: 100%;
    justify-content: center;
  }

  .cta-actions {
    flex-direction: column;
  }

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

  .scenario-img {
    height: 220px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  html {
    scroll-behavior: auto;
  }
}