/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #0B5C4A;
  --secondary: #E07B39;
  --dark: #0F2E28;
  --light: #F6F5F0;
  --card-bg: #FFFFFF;
  --card-sub: #FBFBF8;
  --text: #2B2B2B;
  --text-secondary: #5C6B66;
  --border: #E4E2DA;
  --success: #1A9963;
  --warning: #C4451E;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 10px rgba(15,46,40,0.05);
  --shadow-lg: 0 10px 30px rgba(15,46,40,0.12);
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--light);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
}

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

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

a:hover {
  color: #08483A;
}

ul, ol {
  list-style: none;
}

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

input, textarea {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
}

/* ===== 容器 ===== */
.container,
.grid-container {
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
}

@media (max-width: 640px) {
  .container,
  .grid-container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ===== 按钮系统 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  line-height: 1;
  padding: 0 30px;
  border-radius: var(--radius-pill);
  background: var(--secondary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  border: 2px solid transparent;
}

.btn-primary:hover {
  background: #C9672B;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(224,123,57,0.22);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 3px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  line-height: 1;
  padding: 0 30px;
  border-radius: var(--radius-pill);
  background: rgba(11, 92, 74, 0.04);
  border: 2px solid var(--primary);
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
}

.btn-secondary:hover {
  background: rgba(11, 92, 74, 0.08);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-lg {
  height: 52px;
  padding: 0 36px;
  font-size: 16px;
}

/* ===== 导航（悬浮胶囊） ===== */
.site-header {
  position: fixed;
  top: 12px;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  pointer-events: none;
}

.navbar {
  pointer-events: auto;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 24px rgba(15, 46, 40, 0.08);
  width: 100%;
  max-width: 1200px;
  margin: 0 20px;
  transition: box-shadow var(--transition);
}

.navbar:hover {
  box-shadow: 0 10px 30px rgba(15, 46, 40, 0.12);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px 8px 20px;
  gap: 12px;
  min-height: 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
}

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

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links li a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  color: var(--text);
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.nav-links li a:hover {
  color: var(--primary);
  background: rgba(11, 92, 74, 0.06);
}

.nav-links li a.active {
  background: rgba(11, 92, 74, 0.10);
  color: var(--primary);
  font-weight: 600;
}

.btn-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 24px;
  border-radius: var(--radius-pill);
  background: var(--secondary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn-nav:hover {
  background: #C9672B;
  color: #fff;
  transform: translateY(-2px);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(11, 92, 74, 0.08);
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
  stroke: var(--primary);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 90vh;
  min-height: 640px;
  max-height: 900px;
  height: 90vh;
  display: flex;
  align-items: center;
  background: linear-gradient(rgba(11, 92, 74, 0.10), rgba(11, 92, 74, 0.10)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 60%;
  background-image: radial-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.5;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 140px;
  background: linear-gradient(to top, var(--light) 0%, transparent 100%);
  z-index: 1;
  pointer-events: none;
}

.hero .grid-container {
  position: relative;
  z-index: 2;
  width: 100%;
}

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

.hero h1 {
  font-size: 44px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 32px;
  line-height: 1.7;
}

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

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 52px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

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

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== 通用板块 ===== */
.section {
  padding: 100px 0;
}

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(11, 92, 74, 0.08);
  padding: 5px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
  letter-spacing: 0.3px;
}

.section-tag i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-block;
}

.section-head h2 {
  font-size: 32px;
  line-height: 1.25;
  color: var(--text);
  font-weight: 700;
  margin-bottom: 8px;
}

.section-lead {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 660px;
  line-height: 1.7;
}

/* ===== 功能分组 ===== */
.features {
  background: var(--light);
  padding: 100px 0;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  height: 100%;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(11, 92, 74, 0.25);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(11, 92, 74, 0.10);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.feature-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.feature-card-wide {
  padding: 32px 36px;
}

.feature-wide-inner {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.feature-wide-inner .feature-icon {
  flex-shrink: 0;
  margin-bottom: 0;
  width: 56px;
  height: 56px;
  border-radius: 16px;
}

.feature-wide-inner h3 {
  font-size: 21px;
  margin-bottom: 6px;
}

.feature-wide-inner p {
  max-width: 700px;
  font-size: 16px;
}

/* ===== 使用场景 ===== */
.scenes-section {
  background: var(--card-sub);
  padding: 100px 0;
}

.scene-row {
  display: flex;
  align-items: center;
  gap: 48px;
  margin-bottom: 72px;
}

.scene-row:last-child {
  margin-bottom: 0;
}

.scene-row.reverse {
  flex-direction: row-reverse;
}

.scene-img {
  flex: 0 0 50%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.scene-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 260px;
}

.scene-text {
  flex: 1;
}

.scene-text .section-tag {
  margin-bottom: 12px;
}

.scene-text h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.3;
}

.scene-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 520px;
}

/* ===== 成功案例 ===== */
.cases-section {
  background: var(--light);
  padding: 100px 0;
}

.stats-row {
  display: flex;
  gap: 40px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.stat-item {
  flex: 1;
  min-width: 160px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: box-shadow var(--transition);
}

.stat-item:hover {
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 6px;
}

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

.case-cards {
  gap: 24px;
}

.case-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  height: 100%;
  transition: box-shadow var(--transition), transform var(--transition);
  border-left: 4px solid var(--primary);
}

.case-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.case-card h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.case-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 价格方案 ===== */
.pricing-section {
  background: var(--card-sub);
  padding: 100px 0;
}

.pricing-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

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

.pricing-card.recommended {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-lg);
}

.pricing-tag {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
}

.pricing-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 48px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 20px;
}

.pricing-features {
  margin-bottom: 28px;
  flex: 1;
}

.pricing-features li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.5;
}

.pricing-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
}

.pricing-card .btn-primary,
.pricing-card .btn-secondary {
  width: 100%;
}

/* ===== 最新信息 ===== */
.news-section {
  background: var(--light);
  padding: 100px 0;
}

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

.news-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.news-item:hover {
  border-color: rgba(11, 92, 74, 0.35);
  box-shadow: var(--shadow-sm);
  background: rgba(11, 92, 74, 0.02);
}

.news-link {
  display: flex;
  gap: 16px;
  padding: 12px;
  align-items: flex-start;
}

.news-thumb {
  width: 120px;
  height: 90px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
  background: rgba(11, 92, 74, 0.08);
}

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

.news-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 2px 0;
}

.news-tag {
  align-self: flex-start;
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(11, 92, 74, 0.10);
  padding: 2px 12px;
  border-radius: var(--radius-pill);
  line-height: 1.6;
}

.news-body h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  transition: color var(--transition);
}

.news-link:hover .news-body h4 {
  color: var(--primary);
}

.news-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.news-body time {
  font-size: 13px;
  color: var(--text-secondary);
  opacity: 0.8;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--card-sub);
  text-align: center;
  color: var(--text-secondary);
}

.empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(11, 92, 74, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
}

.empty-state p {
  font-size: 16px;
  color: var(--text-secondary);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--card-sub);
  padding: 100px 0;
}

.faq-list {
  max-width: 860px;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item.open {
  border-color: rgba(11, 92, 74, 0.3);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  text-align: left;
  transition: color var(--transition);
}

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

.faq-question:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(11, 92, 74, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: transform var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid rgba(228, 226, 218, 0.5);
  margin-top: 0;
  padding-top: 16px;
}

/* ===== 最终 CTA ===== */
.cta-section {
  position: relative;
  background: linear-gradient(rgba(15, 46, 40, 0.93), rgba(15, 46, 40, 0.93)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  color: #fff;
  padding: 100px 0;
  text-align: center;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: 20px;
  right: 30px;
  width: 160px;
  height: 160px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
}

.cta-section::after {
  content: "";
  position: absolute;
  top: 45px;
  right: 55px;
  width: 120px;
  height: 120px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #fff;
  line-height: 1.3;
}

.cta-section p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.cta-section .btn-primary {
  background: var(--secondary);
}

.cta-section .btn-primary:hover {
  background: #C9672B;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark);
  color: #fff;
  padding: 80px 0 0;
}

.footer-brand {
  padding-right: 30px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-logo .brand-icon {
  background: var(--secondary);
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

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

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: #fff;
}

.footer-col p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 8px;
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 56px;
  padding: 24px 0;
  text-align: center;
}

.footer-copyright p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 34px;
  }

  .scene-row {
    gap: 28px;
  }

  .stats-row {
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .section,
  .features,
  .scenes-section,
  .cases-section,
  .pricing-section,
  .news-section,
  .faq-section,
  .cta-section {
    padding: 60px 0;
  }

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

  .section-lead {
    font-size: 15px;
  }

  /* 导航折叠 */
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(15, 46, 40, 0.08);
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    gap: 4px;
  }

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

  .nav-links li a {
    text-align: center;
    padding: 12px;
  }

  .btn-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-inner {
    padding: 8px 12px;
  }

  .brand {
    font-size: 16px;
  }

  /* Hero 手机端 */
  .hero {
    height: auto;
    min-height: 640px;
    padding: 120px 0 60px;
  }

  .hero-content {
    padding-right: 0;
    margin-bottom: 32px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-sub {
    font-size: 16px;
  }

  .hero-btns {
    flex-direction: column;
    gap: 12px;
  }

  .hero-btns .btn-primary,
  .hero-btns .btn-secondary {
    width: 100%;
  }

  .hero-stats {
    gap: 20px;
    margin-top: 36px;
  }

  .hero-stat {
    flex: 1 1 30%;
    min-width: 90px;
  }

  .stat-num {
    font-size: 24px;
  }

  /* 功能卡 */
  .feature-card-wide {
    padding: 24px;
  }

  .feature-wide-inner {
    flex-direction: column;
    gap: 14px;
  }

  /* 场景 */
  .scene-row,
  .scene-row.reverse {
    flex-direction: column;
    gap: 24px;
  }

  .scene-img {
    flex: none;
    width: 100%;
  }

  .scene-text {
    width: 100%;
  }

  .scene-text h3 {
    font-size: 20px;
  }

  /* 数据卡 */
  .stats-row {
    gap: 12px;
  }

  .stat-item {
    min-width: 100%;
  }

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

  /* 价格卡 */
  .pricing-card {
    margin-bottom: 16px;
  }

  .pricing-card.recommended {
    order: -1;
  }

  .pricing-price {
    font-size: 36px;
  }

  /* 最新信息 */
  .news-thumb {
    width: 80px;
    height: 64px;
  }

  .news-body h4 {
    font-size: 15px;
  }

  .news-body p {
    font-size: 13px;
    -webkit-line-clamp: 2;
  }

  .news-body time {
    font-size: 12px;
  }

  /* FAQ */
  .faq-question {
    font-size: 15px;
    padding: 16px 18px;
  }

  .faq-answer-inner {
    padding: 0 18px 16px;
  }

  /* CTA */
  .cta-section p {
    font-size: 14px;
  }

  /* 页脚 */
  .site-footer {
    padding-top: 60px;
  }

  .footer-brand {
    padding-right: 0;
    margin-bottom: 28px;
  }

  .footer-copyright {
    margin-top: 40px;
  }
}

/* roulang page: article */
:root {
  --primary: #0B5C4A;
  --primary-dark: #08493A;
  --primary-light: rgba(11, 92, 74, 0.10);
  --accent: #E07B39;
  --accent-dark: #C9672B;
  --dark-bg: #0F2E28;
  --bg-light: #F6F5F0;
  --card-bg: #FFFFFF;
  --card-secondary: #FBFBF8;
  --text-main: #2B2B2B;
  --text-secondary: #5C6B66;
  --text-light: #8A9B96;
  --border: #E9E6DE;
  --border-light: #F0EEE8;
  --success: #1A9963;
  --warning: #C4451E;
  --radius-lg: 16px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 10px rgba(15, 46, 40, 0.05);
  --shadow-lg: 0 10px 30px rgba(15, 46, 40, 0.12);
  --font-sans: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  --ease: 0.2s ease;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-light);
  color: var(--text-main);
  line-height: 1.75;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--ease); }
a:hover { color: var(--primary-dark); }
ul, ol { margin: 0; padding: 0; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--dark-bg); font-weight: 700; }

/* 容器 */
.grid-container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
.container-narrow { max-width: 800px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }

/* 悬浮导航 */
.site-header {
  position: fixed;
  top: 12px;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 16px;
  pointer-events: none;
}
.navbar {
  max-width: 1200px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(15, 46, 40, 0.08);
  padding: 0 12px;
  pointer-events: auto;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
  gap: 12px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--dark-bg);
  white-space: nowrap;
}
.brand:hover { color: var(--primary); }
.brand-icon {
  display: inline-flex;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  display: inline-block;
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 15px;
  color: var(--text-main);
  transition: background var(--ease), color var(--ease);
}
.nav-links a:hover {
  color: var(--primary);
  background: rgba(11, 92, 74, 0.06);
}
.nav-links a.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}
.btn-nav {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background var(--ease), transform var(--ease), box-shadow var(--ease);
}
.btn-nav:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(224, 123, 57, 0.32);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  background: rgba(11, 92, 74, 0.08);
  border-radius: 50%;
  color: var(--primary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.nav-toggle svg { width: 20px; height: 20px; }

@media (max-width: 639px) {
  .nav-inner { min-height: 54px; }
  .brand { font-size: 15px; gap: 8px; }
  .brand-icon { width: 32px; height: 32px; }
  .btn-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(255, 255, 255, 0.96);
    border-radius: 20px;
    padding: 14px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    gap: 6px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; text-align: center; padding: 11px 14px; }
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 0;
  cursor: pointer;
  transition: background var(--ease), transform var(--ease), box-shadow var(--ease), border-color var(--ease);
  text-align: center;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(224, 123, 57, 0.3);
}
.btn-secondary {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-secondary:hover {
  background: rgba(11, 92, 74, 0.08);
  color: var(--primary);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: #fff;
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  transform: translateY(-2px);
}

/* 文章页 Hero 头部 */
.article-hero {
  position: relative;
  padding: 148px 0 64px;
  background:
    linear-gradient(rgba(15, 46, 40, 0.72), rgba(15, 46, 40, 0.72)),
    url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  color: #fff;
}
.article-hero h1 {
  color: #fff;
  font-size: 38px;
  line-height: 1.3;
  margin: 20px 0 18px;
  max-width: 860px;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
}
.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: color var(--ease);
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb .current { color: rgba(255, 255, 255, 0.95); max-width: 360px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.breadcrumb .sep { color: rgba(255, 255, 255, 0.45); }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  margin-bottom: 18px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}
.article-meta .meta-item { display: inline-flex; align-items: center; gap: 6px; }
.article-meta .meta-item svg { width: 16px; height: 16px; opacity: 0.75; }
.article-category {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
}
.article-summary {
  margin-top: 18px;
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.1);
  border-left: 4px solid var(--accent);
  border-radius: 0 12px 12px 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.88);
  max-width: 860px;
}

/* 正文区 */
.article-body-section {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  margin: -32px auto 0;
  padding: 44px 0 40px;
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 2;
}
.article-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
  font-size: 16px;
}
.article-content p {
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 18px;
  color: var(--text-main);
}
.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 34px 0 16px;
  color: var(--dark-bg);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.article-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 26px 0 12px;
  color: var(--dark-bg);
}
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--accent-dark); }
.article-content img {
  border-radius: var(--radius-lg);
  margin: 22px auto;
}
.article-content figure margin: 22px 0; }
.article-content figcaption {
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  margin-top: -12px;
  margin-bottom: 22px;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--card-secondary);
  margin: 24px 0;
  padding: 16px 22px;
  border-radius: 0 12px 12px 0;
  color: var(--text-secondary);
  font-size: 15px;
}
.article-content blockquote p { margin-bottom: 0; }
.article-content ul,
.article-content ol {
  padding-left: 24px;
  margin-bottom: 18px;
}
.article-content ul li,
.article-content ol li { margin-bottom: 8px; }
.article-content ul li::marker { color: var(--primary); }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
  font-size: 14px;
}
.article-content table th {
  background: var(--card-secondary);
  font-weight: 600;
  text-align: left;
  padding: 12px 14px;
  border-bottom: 2px solid var(--border);
  color: var(--dark-bg);
}
.article-content table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
}

/* 文章底部：标签 + 上下篇 */
.article-footer-section {
  background: var(--bg-light);
  padding: 32px 0 8px;
}
.article-footer-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}
.tag {
  display: inline-flex;
  align-items: center;
  height: 30px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-secondary);
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}
.tag:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  margin-bottom: 40px;
}
.post-nav a,
.post-nav .disabled {
  display: block;
  max-width: 48%;
  padding: 14px 18px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-main);
  transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
}
.post-nav a:hover {
  border-color: var(--primary);
  background: var(--card-secondary);
  box-shadow: var(--shadow-sm);
}
.post-nav .disabled {
  color: var(--text-light);
  cursor: default;
}
.post-nav .nav-label { display: block; font-size: 12px; color: var(--text-light); margin-bottom: 4px; }
.post-nav .nav-next { text-align: right; }

/* 相关推荐 */
.related-section {
  background: var(--bg-light);
  padding: 48px 0 56px;
}
.related-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--dark-bg);
  margin-bottom: 6px;
  position: relative;
  padding-left: 16px;
}
.related-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 4px;
  background: var(--primary);
}
.related-sub { font-size: 14px; color: var(--text-secondary); margin-bottom: 26px; }
.related-grid { display: flex; flex-wrap: wrap; gap: 20px; }
.related-card {
  flex: 1 1 calc(33.333% - 20px);
  min-width: 260px;
  display: flex;
  gap: 14px;
  padding: 14px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
  align-items: center;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.related-thumb {
  width: 110px;
  height: 82px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--card-secondary);
}
.related-thumb img { width: 100%; height: 100%; object-fit: cover; }
.related-info { min-width: 0; }
.related-info h4 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--dark-bg);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-date {
  font-size: 12px;
  color: var(--text-light);
}

/* 返回入口 CTA */
.article-cta-section {
  background:
    linear-gradient(rgba(15, 46, 40, 0.85), rgba(15, 46, 40, 0.85)),
    radial-gradient(circle at 12% 30%, rgba(255, 255, 255, 0.06) 0 1px, transparent 1px),
    url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  background-size: cover, auto, cover;
  padding: 72px 0;
  text-align: center;
  color: #fff;
}
.article-cta-section h2 {
  color: #fff;
  font-size: 30px;
  margin: 0 0 12px;
}
.article-cta-section p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  max-width: 520px;
  margin: 0 auto 28px;
}
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 无文章状态 */
.not-found-section {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 140px 20px 80px;
  background:
    radial-gradient(circle at 20% 30%, rgba(11, 92, 74, 0.06) 0 1px, transparent 1px),
    var(--bg-light);
  background-size: 26px 26px, auto;
  text-align: center;
}
.not-found-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 52px 44px;
  max-width: 460px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.not-found-card h1 { font-size: 30px; margin: 0 0 12px; }
.not-found-card p { color: var(--text-secondary); margin-bottom: 26px; }

/* 页脚 */
.site-footer {
  background: var(--dark-bg);
  color: rgba(255, 255, 255, 0.78);
  padding: 60px 0 28px;
  font-size: 14px;
}
.site-footer .grid-container { max-width: 1200px; }
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand .brand-icon {
  display: inline-flex;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  align-items: center;
  justify-content: center;
}
.footer-brand p { color: rgba(255, 255, 255, 0.62); line-height: 1.75; max-width: 320px; }
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--ease);
}
.footer-col a:hover { color: #fff; }
.footer-col p { color: rgba(255, 255, 255, 0.62); margin-bottom: 8px; }
.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 44px;
  padding-top: 22px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
}
.footer-copyright p { margin: 0; }

/* 响应式 */
@media (max-width: 1024px) and (min-width: 640px) {
  .related-card { flex: 1 1 calc(50% - 20px); }
}
@media (max-width: 639px) {
  .article-hero { padding: 116px 0 48px; }
  .article-hero h1 { font-size: 26px; }
  .article-summary { font-size: 14px; padding: 14px 16px; }
  .article-body-section { padding: 28px 12px; margin-top: -20px; }
  .article-content { padding: 0 12px; font-size: 15px; }
  .article-content p { font-size: 15px; line-height: 1.85; }
  .post-nav { flex-direction: column; }
  .post-nav a, .post-nav .disabled { max-width: 100%; }
  .post-nav .nav-next { text-align: left; }
  .related-grid { flex-direction: column; }
  .related-card { width: 100%; }
  .article-cta-section { padding: 56px 20px; }
  .article-cta-section h2 { font-size: 24px; }
  .cta-actions { flex-direction: column; align-items: center; }
  .cta-actions .btn { width: 100%; max-width: 320px; }
  .not-found-section { padding: 120px 16px 60px; }
  .not-found-card { padding: 36px 24px; }
  .footer-col { margin-bottom: 24px; }
  .site-footer { padding-top: 44px; }
}

/* roulang page: category1 */
/* ========== Design Variables ========== */
        :root {
            --primary: #0B5C4A;
            --primary-dark: #0F2E28;
            --primary-light: rgba(11, 92, 74, 0.10);
            --accent: #E07B39;
            --accent-dark: #C9672B;
            --bg: #F6F5F0;
            --card: #FFFFFF;
            --card-soft: #FBFBF8;
            --text: #2B2B2B;
            --muted: #5C6B66;
            --border: #E4E2DA;
            --border-light: #E9E6DE;
            --success: #1A9963;
            --warning: #C4451E;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 10px rgba(15, 46, 40, 0.05);
            --shadow-lg: 0 10px 30px rgba(15, 46, 40, 0.12);
            --transition: all 0.2s ease;
            --container-max: 1200px;
        }

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

        body {
            margin: 0;
            font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0 0 0.5em;
            font-family: inherit;
            color: var(--primary-dark);
            line-height: 1.25;
            font-weight: 700;
        }

        h1 {
            font-size: 44px;
        }

        h2 {
            font-size: 32px;
        }

        h3 {
            font-size: 21px;
        }

        p {
            margin: 0 0 16px;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--primary-dark);
        }

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

        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

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

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

        .grid-container {
            max-width: var(--container-max);
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 30px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.01em;
            transition: var(--transition);
            line-height: 1;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(224, 123, 57, 0.25);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(224, 123, 57, 0.3);
        }

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

        .btn-secondary {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }

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

        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.65);
            color: #fff;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .btn:focus {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* ========== Section Tag ========== */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-tag::before {
            content: "";
            width: 18px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .section-tag.light {
            color: rgba(255, 255, 255, 0.85);
        }

        .section-tag.light::before {
            background: rgba(255, 255, 255, 0.85);
        }

        /* ========== Navigation ========== */
        .site-header {
            position: fixed;
            top: 12px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            width: min(1200px, calc(100% - 32px));
        }

        .navbar {
            background: rgba(255, 255, 255, 0.85);
            -webkit-backdrop-filter: blur(18px);
            backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, 0.6);
            border-radius: var(--radius-pill);
            box-shadow: 0 8px 24px rgba(15, 46, 40, 0.08);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 8px 20px;
            position: relative;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: var(--primary-dark);
            white-space: nowrap;
            flex-shrink: 0;
        }

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

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            color: var(--text);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(11, 92, 74, 0.05);
        }

        .nav-links a.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }

        .btn-nav {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 36px;
            padding: 0 22px;
            border-radius: var(--radius-pill);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
        }

        .btn-nav:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            color: var(--primary-dark);
            background: rgba(11, 92, 74, 0.06);
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-light);
        }

        .nav-toggle svg {
            width: 20px;
            height: 20px;
        }

        /* ========== Category Hero ========== */
        .cat-hero {
            position: relative;
            display: flex;
            align-items: center;
            min-height: 62vh;
            padding: 150px 0 90px;
            background:
                linear-gradient(0deg, rgba(15, 46, 40, 0.48), rgba(15, 46, 40, 0.30)),
                url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            overflow: hidden;
        }

        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(255, 255, 255, 0.10) 1px, transparent 1px);
            background-size: 22px 22px;
            pointer-events: none;
        }

        .cat-hero .hero-content {
            max-width: 680px;
            position: relative;
            z-index: 1;
        }

        .cat-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: rgba(255, 255, 255, 0.9);
            padding: 6px 18px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 22px;
            backdrop-filter: blur(6px);
        }

        .cat-hero h1 {
            color: #fff;
            font-size: 44px;
            margin-bottom: 18px;
        }

        .cat-hero .hero-sub {
            color: rgba(255, 255, 255, 0.85);
            font-size: 18px;
            line-height: 1.75;
            margin-bottom: 32px;
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* ========== Feature Row ========== */
        .feature-row {
            padding: 90px 0;
            background: var(--card);
        }

        .feature-row.feature-alt {
            background: var(--bg);
        }

        .feature-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .feature-media img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: transform 0.2s ease;
        }

        .feature-row:hover .feature-media img {
            transform: scale(1.02);
        }

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

        .feature-content h2 {
            font-size: 30px;
            margin-bottom: 16px;
        }

        .feature-content p {
            color: var(--muted);
            font-size: 16px;
            line-height: 1.8;
        }

        .feature-row.reverse .feature-media {
            order: 2;
        }

        .feature-row.reverse .feature-content {
            order: 1;
        }

        /* ========== Checklist ========== */
        .checklist-section {
            padding: 90px 0;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            color: #fff;
        }

        .checklist-section h2 {
            color: #fff;
            margin-bottom: 16px;
        }

        .checklist-section .section-desc {
            color: rgba(255, 255, 255, 0.78);
            font-size: 16px;
            line-height: 1.8;
        }

        .checklist {
            margin-top: 8px;
        }

        .checklist li {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.14);
        }

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

        .checklist .check-icon {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            margin-top: 2px;
        }

        .checklist .check-icon svg {
            width: 14px;
            height: 14px;
        }

        .checklist strong {
            display: block;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }

        .checklist p {
            color: rgba(255, 255, 255, 0.72);
            font-size: 14px;
            line-height: 1.65;
            margin: 0;
        }

        /* ========== CTA Band ========== */
        .cta-band {
            background: var(--primary-dark);
            padding: 80px 0;
            background-image:
                linear-gradient(0deg, rgba(15, 46, 40, 0.75), rgba(15, 46, 40, 0.75)),
                url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
        }

        .cta-band h2 {
            color: #fff;
            font-size: 30px;
            margin-bottom: 14px;
        }

        .cta-band p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .cta-band .btn {
            margin: 0 6px;
        }

        /* ========== Back Section ========== */
        .cat-back {
            padding: 70px 0 100px;
            text-align: center;
        }

        .cat-back p {
            color: var(--muted);
            font-size: 15px;
            margin-bottom: 20px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 70px 0 30px;
            font-size: 14px;
        }

        .site-footer .footer-brand {
            margin-bottom: 24px;
        }

        .site-footer .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            line-height: 1.7;
            max-width: 340px;
            margin-bottom: 0;
        }

        .site-footer .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }

        .site-footer .footer-col ul {
            margin: 0;
        }

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

        .site-footer .footer-col a,
        .site-footer .footer-col p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 6px;
            transition: color 0.2s ease;
        }

        .site-footer .footer-col a:hover {
            color: #fff;
        }

        .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            margin-top: 40px;
            padding-top: 24px;
            text-align: center;
        }

        .footer-copyright p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
            margin: 0;
        }

        /* ========== FAQ Accordion (Reusable) ========== */
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-bottom: 14px;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(11, 92, 74, 0.25);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-dark);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.2s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.2s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
            padding-top: 14px;
        }

        .faq-answer p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.7;
            margin: 0;
        }

        /* ========== Responsive ========== */
        @media (min-width: 641px) and (max-width: 1024px) {
            .cat-hero h1 {
                font-size: 34px;
            }

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

            .feature-content h2 {
                font-size: 26px;
            }

            .nav-links a {
                padding: 6px 12px;
                font-size: 14px;
            }

            .btn-nav {
                padding: 0 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 640px) {
            h1 {
                font-size: 28px;
            }

            h2 {
                font-size: 22px;
            }

            h3 {
                font-size: 19px;
            }

            .site-header {
                width: calc(100% - 24px);
                top: 8px;
            }

            .nav-inner {
                padding: 6px 12px;
                gap: 10px;
            }

            .brand {
                font-size: 16px;
                gap: 8px;
            }

            .brand-icon {
                width: 32px;
                height: 32px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 0;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                background: rgba(255, 255, 255, 0.96);
                -webkit-backdrop-filter: blur(18px);
                backdrop-filter: blur(18px);
                border-radius: var(--radius-md);
                padding: 16px;
                box-shadow: var(--shadow-lg);
                border: 1px solid rgba(255, 255, 255, 0.6);
            }

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

            .nav-links a {
                text-align: center;
                padding: 10px 16px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .btn-nav {
                height: 34px;
                padding: 0 14px;
                font-size: 13px;
                margin-left: auto;
            }

            .cat-hero {
                min-height: 65vh;
                padding: 120px 16px 60px;
            }

            .cat-hero h1 {
                font-size: 28px;
            }

            .cat-hero .hero-sub {
                font-size: 16px;
            }

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

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

            .feature-row,
            .checklist-section,
            .cta-band {
                padding: 60px 0;
            }

            .feature-content {
                padding: 24px 0 0;
            }

            .feature-row.reverse .feature-media {
                order: 0;
            }

            .feature-row.reverse .feature-content {
                order: 0;
            }

            .feature-media img {
                aspect-ratio: 16 / 9;
            }

            .checklist li {
                padding: 16px 0;
            }

            .cta-band h2 {
                font-size: 24px;
            }

            .cta-band .btn {
                display: block;
                width: 100%;
                margin: 10px 0 0;
            }

            .cat-back {
                padding: 50px 0 80px;
            }

            .site-footer {
                padding: 56px 0 24px;
            }

            .site-footer .footer-col {
                margin-bottom: 28px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #0B5C4A;
            --color-accent: #E07B39;
            --color-dark: #0F2E28;
            --color-bg: #F6F5F0;
            --color-card: #FFFFFF;
            --color-card-soft: #FBFBF8;
            --color-text: #2B2B2B;
            --color-text-secondary: #5C6B66;
            --color-border: #E4E2DA;
            --color-success: #1A9963;
            --color-warning: #C4451E;
            --radius-lg: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 10px rgba(15, 46, 40, 0.05);
            --shadow-md: 0 10px 30px rgba(15, 46, 40, 0.12);
            --space-section-desktop: 100px;
            --space-section-tablet: 80px;
            --space-section-mobile: 60px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius-sm);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        ul,
        ol {
            list-style: none;
        }

        .grid-container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 悬浮胶囊导航 ===== */
        .site-header {
            position: fixed;
            top: 12px;
            left: 0;
            right: 0;
            z-index: 100;
            display: flex;
            justify-content: center;
            padding: 0 20px;
        }

        .navbar {
            width: 100%;
            max-width: 1120px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, 0.6);
            border-radius: var(--radius-pill);
            box-shadow: 0 8px 24px rgba(15, 46, 40, 0.08);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 20px 8px 16px;
            gap: 12px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 16px;
            color: var(--color-primary);
            white-space: nowrap;
        }

        .brand-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(11, 92, 74, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .brand-icon svg {
            width: 18px;
            height: 18px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .nav-links li a {
            display: block;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            transition: background 0.2s ease, color 0.2s ease;
        }

        .nav-links li a:hover {
            color: var(--color-primary);
            background: rgba(11, 92, 74, 0.06);
        }

        .nav-links li a.active {
            background: rgba(11, 92, 74, 0.1);
            color: var(--color-primary);
            font-weight: 600;
        }

        .btn-nav {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 40px;
            padding: 0 26px;
            background: var(--color-accent);
            color: #fff;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background 0.2s ease, transform 0.2s ease;
        }

        .btn-nav:hover {
            background: #C9672B;
            transform: translateY(-2px);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            cursor: pointer;
            color: var(--color-text);
            align-items: center;
            justify-content: center;
        }

        .nav-toggle svg {
            width: 22px;
            height: 22px;
        }

        .nav-toggle:focus {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            min-height: 640px;
            height: 90vh;
            max-height: 900px;
            display: flex;
            align-items: center;
            background-image: linear-gradient(rgba(15, 46, 40, 0.82), rgba(11, 92, 74, 0.68)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 120px 0 60px;
            overflow: hidden;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            top: 20%;
            right: 8%;
            width: 260px;
            height: 260px;
            background-image: radial-gradient(circle, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
            background-size: 18px 18px;
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero .hero-tag {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            border-radius: var(--radius-pill);
            font-size: 13px;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
        }

        .category-hero h1 {
            font-size: 44px;
            line-height: 1.25;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }

        .category-hero .hero-sub {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.88);
            max-width: 560px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .category-hero .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 32px;
            background: var(--color-accent);
            color: #fff;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease;
        }

        .category-hero .btn-primary:hover {
            background: #C9672B;
            transform: translateY(-2px);
        }

        .category-hero .btn-primary:focus {
            outline: 2px solid rgba(255, 255, 255, 0.8);
            outline-offset: 3px;
        }

        .category-hero .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 32px;
            background: transparent;
            color: #fff;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            border: 2px solid rgba(255, 255, 255, 0.7);
            cursor: pointer;
            transition: background 0.2s ease, border-color 0.2s ease;
        }

        .category-hero .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        .category-hero .btn-secondary:focus {
            outline: 2px solid rgba(255, 255, 255, 0.8);
            outline-offset: 3px;
        }

        /* ===== 板块标题 ===== */
        .section-head {
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 1px;
            padding-left: 14px;
            position: relative;
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            border-radius: 2px;
            background: var(--color-primary);
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .section-head .section-desc {
            font-size: 15px;
            color: var(--color-text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }

        /* ===== 卡片网格 ===== */
        .section {
            padding: 100px 0;
        }

        .security-grid-section {
            background: var(--color-bg);
            padding: 100px 0;
        }

        .security-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 20px;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

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

        .security-card .card-media {
            border-radius: 12px;
            overflow: hidden;
            margin-bottom: 20px;
        }

        .security-card .card-media img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: 12px;
        }

        .security-card .card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .security-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .security-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
        }

        .security-card .card-tag {
            align-self: flex-start;
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            background: rgba(11, 92, 74, 0.08);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 600;
            margin-top: auto;
        }

        /* ===== 深色拓展卡 ===== */
        .deep-card-section {
            background: var(--color-bg);
            padding-top: 0;
            padding-bottom: 100px;
        }

        .deep-card {
            background: var(--color-dark);
            border-radius: var(--radius-lg);
            padding: 50px 48px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            overflow: hidden;
        }

        .deep-card::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
        }

        .deep-card .deep-icon {
            flex-shrink: 0;
            width: 72px;
            height: 72px;
            border-radius: 18px;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-accent);
        }

        .deep-card .deep-icon svg {
            width: 34px;
            height: 34px;
        }

        .deep-card .deep-content {
            flex: 1;
        }

        .deep-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }

        .deep-card p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.78);
            max-width: 720px;
        }

        /* ===== 返回首页 ===== */
        .back-section {
            background: var(--color-bg);
            padding-top: 0;
            padding-bottom: 100px;
        }

        .back-wrap {
            text-align: center;
        }

        .btn-return {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 48px;
            padding: 0 34px;
            background: transparent;
            border: 2px solid var(--color-primary);
            color: var(--color-primary);
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease;
        }

        .btn-return:hover {
            background: rgba(11, 92, 74, 0.08);
            transform: translateY(-2px);
        }

        .btn-return:focus {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-dark);
            padding: 72px 0 36px;
            color: rgba(255, 255, 255, 0.7);
        }

        .site-footer .grid-container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        .footer-brand {
            margin-bottom: 32px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-logo .brand-icon {
            width: 36px;
            height: 36px;
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }

        .footer-col {
            margin-bottom: 32px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

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

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-col p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 8px;
            line-height: 1.6;
        }

        .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 28px;
            margin-top: 24px;
            text-align: center;
        }

        .footer-copyright p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1024px) {
            .nav-links li a {
                padding: 8px 12px;
                font-size: 13px;
            }

            .btn-nav {
                padding: 0 18px;
                font-size: 13px;
            }

            .category-hero h1 {
                font-size: 34px;
            }

            .section {
                padding: 80px 0;
            }

            .security-grid-section {
                padding: 80px 0;
            }

            .deep-card-section {
                padding-bottom: 80px;
            }

            .deep-card {
                padding: 40px 32px;
                flex-direction: column;
                text-align: left;
                gap: 20px;
            }
        }

        @media screen and (max-width: 768px) {
            .site-header {
                top: 10px;
                padding: 0 14px;
            }

            .nav-inner {
                flex-wrap: wrap;
                padding: 8px 12px;
            }

            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: rgba(255, 255, 255, 0.95);
                backdrop-filter: blur(18px);
                border-radius: 20px;
                padding: 12px;
                margin-top: 10px;
                box-shadow: var(--shadow-md);
            }

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

            .nav-links li a {
                padding: 10px 16px;
                font-size: 15px;
            }

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

            .nav-toggle {
                display: flex;
                margin-left: 4px;
            }

            .category-hero {
                min-height: 560px;
                padding: 110px 0 50px;
            }

            .category-hero h1 {
                font-size: 28px;
            }

            .category-hero .hero-sub {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .category-hero .btn-primary,
            .category-hero .btn-secondary {
                width: 100%;
                max-width: 280px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .section {
                padding: 60px 0;
            }

            .security-grid-section {
                padding: 60px 0;
            }

            .deep-card-section {
                padding-bottom: 60px;
            }

            .deep-card {
                padding: 32px 24px;
            }

            .deep-card .deep-icon {
                width: 56px;
                height: 56px;
                border-radius: 14px;
            }

            .deep-card .deep-icon svg {
                width: 26px;
                height: 26px;
            }

            .back-section {
                padding-bottom: 60px;
            }
        }

        @media screen and (max-width: 520px) {
            body {
                font-size: 15px;
            }

            .brand {
                font-size: 14px;
            }

            .brand-icon {
                width: 28px;
                height: 28px;
            }

            .category-hero h1 {
                font-size: 24px;
            }

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

            .section-head .section-desc {
                font-size: 14px;
            }

            .deep-card h3 {
                font-size: 19px;
            }

            .deep-card p {
                font-size: 14px;
            }

            .security-card h3 {
                font-size: 18px;
            }

            .footer-logo {
                font-size: 18px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #0B5C4A;
            --primary-dark: #084B3D;
            --accent: #E07B39;
            --accent-dark: #C9672B;
            --dark: #0F2E28;
            --bg: #F6F5F0;
            --card-bg: #FFFFFF;
            --card-sub: #FBFBF8;
            --text: #2B2B2B;
            --text-secondary: #5C6B66;
            --border: #E4E2DA;
            --border-light: #E9E6DE;
            --success: #1A9963;
            --warning: #C4451E;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 10px rgba(15, 46, 40, 0.05);
            --shadow-hover: 0 10px 30px rgba(15, 46, 40, 0.12);
            --transition: all 0.2s ease;
            --font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: inline-block;
            vertical-align: middle;
        }

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

        a:hover,
        a:focus {
            color: var(--primary-dark);
        }

        ul,
        ol {
            padding: 0;
            margin: 0;
        }

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0 0 16px;
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }

        p {
            margin: 0 0 16px;
        }

        .grid-container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (max-width: 640px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

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

        .section-head .section-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            background: rgba(11, 92, 74, 0.10);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 32px;
            margin-bottom: 10px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin-bottom: 0;
        }

        @media (max-width: 640px) {
            .section-head h2 {
                font-size: 22px;
            }
            .section-head {
                margin-bottom: 32px;
            }
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 30px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }

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

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

        .btn-primary:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-outline:hover {
            background: rgba(11, 92, 74, 0.08);
            color: var(--primary);
        }

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

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .site-header {
            position: fixed;
            top: 12px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            padding: 0 16px;
        }

        .navbar {
            width: 100%;
            max-width: 1100px;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            background: rgba(255, 255, 255, 0.85);
            -webkit-backdrop-filter: blur(18px);
            backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, 0.6);
            border-radius: var(--radius-pill);
            box-shadow: 0 8px 24px rgba(15, 46, 40, 0.08);
            padding: 10px 20px;
            position: relative;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 16px;
            color: var(--primary);
            flex-shrink: 0;
        }

        .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(11, 92, 74, 0.10);
            color: var(--primary);
        }

        .brand:hover {
            color: var(--primary-dark);
        }

        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
            margin: 0;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 14px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(11, 92, 74, 0.06);
        }

        .nav-links a.active {
            background: rgba(11, 92, 74, 0.10);
            color: var(--primary);
            font-weight: 600;
        }

        .btn-nav {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 38px;
            padding: 0 22px;
            border-radius: var(--radius-pill);
            background: var(--accent);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .btn-nav:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(11, 92, 74, 0.08);
            color: var(--primary);
            flex-shrink: 0;
        }

        .nav-toggle svg {
            width: 20px;
            height: 20px;
        }

        @media (max-width: 640px) {
            .nav-inner {
                gap: 12px;
                padding: 8px 14px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 12px);
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                background: rgba(255, 255, 255, 0.95);
                -webkit-backdrop-filter: blur(18px);
                backdrop-filter: blur(18px);
                border-radius: 24px;
                padding: 14px;
                box-shadow: 0 12px 32px rgba(15, 46, 40, 0.12);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                display: block;
                text-align: center;
                padding: 12px 14px;
            }
            .nav-toggle {
                display: flex;
            }
            .btn-nav {
                margin-left: auto;
                height: 36px;
                padding: 0 16px;
                font-size: 13px;
            }
        }

        .page-hero {
            position: relative;
            min-height: 640px;
            max-height: 760px;
            display: flex;
            align-items: center;
            padding: 140px 0 80px;
            background:
                linear-gradient(135deg, rgba(11, 92, 74, 0.16), rgba(224, 123, 57, 0.07)),
                url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: 20%;
            right: -60px;
            width: 240px;
            height: 240px;
            background-image: radial-gradient(rgba(11, 92, 74, 0.20) 1px, transparent 1px);
            background-size: 22px 22px;
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero .grid-container {
            position: relative;
            z-index: 1;
            width: 100%;
        }

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

        .hero-tag {
            display: inline-block;
            padding: 5px 16px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.82);
            border: 1px solid rgba(255, 255, 255, 0.7);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .hero-content h1 {
            font-size: 44px;
            line-height: 1.2;
            margin-bottom: 18px;
            color: var(--text);
        }

        .hero-sub {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .hero-visual {
            text-align: center;
        }

        .hero-visual img {
            width: 100%;
            border-radius: 20px;
            box-shadow: var(--shadow-hover);
            max-width: 420px;
        }

        @media (max-width: 1024px) {
            .page-hero {
                min-height: 560px;
                padding: 120px 0 60px;
            }
            .hero-content h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 640px) {
            .page-hero {
                min-height: auto;
                padding: 100px 0 50px;
            }
            .hero-content {
                padding-right: 0;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-visual {
                margin-top: 30px;
            }
            .hero-visual img {
                max-width: 100%;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
        }

        .steps-section {
            padding: 100px 0;
        }

        .steps-list {
            margin-top: 10px;
        }

        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px;
            height: calc(100% - 20px);
            margin-bottom: 20px;
            position: relative;
            overflow: hidden;
            transition: var(--transition);
        }

        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), transparent);
            opacity: 0.6;
        }

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

        .step-num {
            display: block;
            font-size: 46px;
            font-weight: 800;
            line-height: 1;
            color: rgba(11, 92, 74, 0.14);
            margin-bottom: 18px;
        }

        .step-card h3 {
            font-size: 19px;
            margin-bottom: 12px;
        }

        .step-card p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        @media (max-width: 1024px) {
            .steps-section {
                padding: 80px 0;
            }
        }

        @media (max-width: 640px) {
            .steps-section {
                padding: 60px 0;
            }
            .step-card {
                padding: 24px;
                height: auto;
            }
        }

        .faq-section {
            padding: 100px 0;
            background: var(--card-sub);
        }

        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(11, 92, 74, 0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            transition: background 0.2s ease;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--primary);
            border-radius: 2px;
            transition: transform 0.2s ease;
        }

        .faq-icon::before {
            width: 10px;
            height: 2px;
        }

        .faq-icon::after {
            width: 2px;
            height: 10px;
        }

        .faq-item.open .faq-icon::after {
            transform: scaleY(0);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.2s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
            margin-top: 0;
        }

        @media (max-width: 1024px) {
            .faq-section {
                padding: 80px 0;
            }
        }

        @media (max-width: 640px) {
            .faq-section {
                padding: 60px 0;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer-inner {
                padding: 0 18px 16px;
                font-size: 14px;
            }
        }

        .cta-section {
            position: relative;
            background-color: var(--dark);
            padding: 90px 0;
            text-align: center;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.16;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 260px;
            height: 260px;
            background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
            background-size: 20px 20px;
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: 32px;
            margin-bottom: 16px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 14px;
        }

        @media (max-width: 640px) {
            .cta-section {
                padding: 60px 0;
            }
            .cta-inner h2 {
                font-size: 22px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }

        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 30px;
            font-size: 14px;
            line-height: 1.8;
        }

        .site-footer .grid-container {
            max-width: 1200px;
        }

        .footer-brand {
            margin-bottom: 20px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-logo .brand-icon {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-col {
            margin-bottom: 20px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
        }

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

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-col p {
            margin-bottom: 6px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
        }

        .footer-copyright {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.14);
            text-align: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
        }

        .footer-copyright p {
            margin-bottom: 0;
        }

        @media (max-width: 640px) {
            .site-footer {
                padding: 50px 0 24px;
            }
            .footer-col {
                margin-bottom: 16px;
            }
            .footer-copyright {
                margin-top: 24px;
            }
        }