/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --primary: #0b2545;
  --primary-light: #163a63;
  --primary-deep: #071b30;
  --accent: #c9a961;
  --accent-light: #e8d5a4;
  --bg: #f5f7fb;
  --bg-white: #ffffff;
  --bg-dark: #0b1e38;
  --text: #162130;
  --text-light: #64748b;
  --text-muted: #94a3b8;
  --border: #dfe5ee;
  --border-light: #eef1f6;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-sm: 8px;
  --shadow: 0 6px 30px rgba(11, 37, 69, 0.08);
  --shadow-lg: 0 16px 48px rgba(11, 37, 69, 0.12);
  --shadow-accent: 0 8px 30px rgba(201, 169, 97, 0.28);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1200px;
  --header-h: 76px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== 按钮 ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: var(--primary-deep);
  font-weight: 600;
  font-size: 16px;
  padding: 14px 32px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  box-shadow: var(--shadow-accent);
  transition: var(--transition);
  letter-spacing: 0.02em;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(201, 169, 97, 0.38);
  color: var(--primary-deep);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 18px rgba(201, 169, 97, 0.25);
}

.btn-primary:focus-visible,
.btn-ghost:focus-visible,
.btn-outline:focus-visible {
  outline: 3px solid rgba(201, 169, 97, 0.5);
  outline-offset: 3px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-weight: 500;
  font-size: 16px;
  padding: 14px 32px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 12px;
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: var(--transition);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
  padding: 10px 24px;
  border: 1.5px solid var(--primary);
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
}

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

/* ========== Header / 浮动 Dock 导航 ========== */
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 20px;
  pointer-events: none;
}

.nav-wrap {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 20px;
  padding: 12px 26px;
  box-shadow: 0 6px 32px rgba(11, 37, 69, 0.10);
  pointer-events: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand .brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 15px;
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 12px;
}

.nav-link {
  position: relative;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  border-radius: 10px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(11, 37, 69, 0.05);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(11, 37, 69, 0.07);
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 12px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--primary-light);
  color: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(11, 37, 69, 0.25);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 780px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(7, 27, 48, 0.94), rgba(11, 37, 69, 0.82)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  color: #fff;
  padding: 160px 0 100px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(201, 169, 97, 0.18), transparent 60%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg), transparent);
  pointer-events: none;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 30px;
  padding: 7px 18px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-light);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}

.hero h1 {
  font-size: 58px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
}

.hero-sub {
  font-size: 20px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 38px;
  max-width: 560px;
}

.hero-btns {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 42px;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}

.hero-trust i {
  color: var(--accent);
}

/* ========== 数据栏 ========== */
.stats {
  background: var(--bg-white);
  padding: 60px 0;
  border-bottom: 1px solid var(--border-light);
  margin-top: -1px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.stat-item {
  text-align: center;
  position: relative;
  padding: 10px 20px;
}

.stat-item + .stat-item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 60px;
  background: var(--border-light);
}

.stat-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 15px;
  color: var(--text-light);
  margin-top: 8px;
}

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

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  background: rgba(201, 169, 97, 0.15);
  color: #9a7d3a;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 30px;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ========== 服务卡片 ========== */
.services {
  background: var(--bg-white);
  padding: 100px 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.service-cover {
  position: relative;
  height: 210px;
  overflow: hidden;
}

.service-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.service-card:hover .service-cover img {
  transform: scale(1.05);
}

.service-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 37, 69, 0.35), transparent 50%);
}

.service-body {
  padding: 30px 28px 34px;
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(11, 37, 69, 0.07);
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 18px;
}

.service-card:nth-child(2) .service-icon {
  background: rgba(201, 169, 97, 0.15);
  color: #9a7d3a;
}

.service-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.service-body p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ========== 分类入口大卡片 ========== */
.category-feature {
  padding: 100px 0;
  background: var(--bg);
}

.category-card {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  align-items: flex-end;
  background: url('/assets/images/coverpic/cover-4.png') center center / cover no-repeat;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.category-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(11, 37, 69, 0.92) 30%, rgba(11, 37, 69, 0.35) 70%);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(11, 37, 69, 0.22);
}

.category-content {
  position: relative;
  z-index: 2;
  padding: 56px;
  max-width: 560px;
}

.category-content .tag-sm {
  display: inline-block;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: var(--accent-light);
  border-radius: 30px;
  font-size: 13px;
  font-weight: 500;
  padding: 5px 16px;
  margin-bottom: 18px;
  letter-spacing: 0.05em;
}

.category-content h3 {
  font-size: 34px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
}

.category-content p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.85;
  margin-bottom: 30px;
}

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

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

.news-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 30px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.news-cat {
  display: inline-block;
  background: rgba(11, 37, 69, 0.06);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
}

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

.news-title {
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 10px;
}

.news-title a {
  color: inherit;
}

.news-title a:hover {
  color: var(--primary);
}

.news-desc {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

.news-link:hover {
  color: var(--accent);
  gap: 12px;
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
}

.empty-state i {
  font-size: 40px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

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

/* ========== 流程步骤 ========== */
.steps-section {
  background: var(--bg);
  padding: 100px 0;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.step-item {
  position: relative;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  text-align: center;
  transition: var(--transition);
}

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

.step-num {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--accent);
  font-size: 22px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 8px 20px rgba(11, 37, 69, 0.22);
}

.step-item:nth-child(2) .step-num {
  background: linear-gradient(135deg, #b08d3f, var(--accent));
  color: #fff;
}

.step-item h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}

.step-item p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

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

.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
  background: var(--bg-white);
}

.faq-item:hover {
  border-color: var(--border);
}

.faq-item.active {
  border-color: rgba(201, 169, 97, 0.4);
  box-shadow: var(--shadow);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  user-select: none;
}

.faq-question .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(11, 37, 69, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--primary);
  flex-shrink: 0;
  transition: var(--transition);
}

.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-item.active .faq-answer {
  max-height: 260px;
}

.faq-answer p {
  padding: 0 26px 24px;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.85;
  border-top: 1px solid var(--border-light);
  padding-top: 18px;
}

/* ========== CTA ========== */
.cta-section {
  position: relative;
  padding: 120px 0;
  background: linear-gradient(135deg, rgba(7, 27, 48, 0.95), rgba(11, 37, 69, 0.88)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  text-align: center;
  color: #fff;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(201, 169, 97, 0.2), transparent 65%);
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
}

.cta-inner p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  margin-bottom: 40px;
}

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

/* ========== 页脚 ========== */
.site-footer {
  background: var(--bg-dark);
  color: #b9c4d1;
  padding: 70px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 50px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand .footer-logo i {
  color: var(--accent);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: #8fa0b5;
  max-width: 300px;
}

.footer-links h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: #8fa0b5;
  padding: 6px 0;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 28px;
  text-align: center;
  font-size: 13px;
  color: #6b7d93;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 46px;
  }

  .section-pad,
  .services,
  .news,
  .steps-section,
  .faq-section,
  .category-feature {
    padding: 80px 0;
  }

  .services-grid {
    gap: 20px;
  }

  .step-item {
    padding: 30px 20px;
  }
}

@media (max-width: 768px) {
  .site-header {
    top: 12px;
  }

  .nav-wrap {
    padding: 10px 16px;
    border-radius: 16px;
  }

  .brand {
    font-size: 16px;
  }

  .brand .brand-icon {
    width: 30px;
    height: 30px;
    font-size: 13px;
  }

  .main-nav {
    gap: 2px;
    margin: 0 4px;
  }

  .nav-link {
    padding: 7px 10px;
    font-size: 13px;
  }

  .nav-cta {
    padding: 8px 14px;
    font-size: 13px;
  }

  .hero {
    min-height: 620px;
    padding: 120px 0 70px;
  }

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

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

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .stat-num {
    font-size: 30px;
  }

  .stat-item + .stat-item::before {
    left: -8px;
    height: 40px;
  }

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

  .category-content {
    padding: 36px 28px;
  }

  .category-content h3 {
    font-size: 26px;
  }

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

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

  .section-head h2 {
    font-size: 28px;
  }

  .cta-section {
    padding: 80px 0;
  }

  .cta-inner h2 {
    font-size: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-btns .btn-primary,
  .hero-btns .btn-ghost {
    width: 100%;
    justify-content: center;
  }

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

@media (max-width: 520px) {
  .site-header {
    padding: 0 10px;
  }

  .nav-wrap {
    padding: 8px 12px;
    border-radius: 14px;
  }

  .brand {
    font-size: 14px;
    gap: 6px;
  }

  .brand .brand-icon {
    width: 26px;
    height: 26px;
    font-size: 11px;
    border-radius: 8px;
  }

  .main-nav .nav-link {
    padding: 6px 7px;
    font-size: 12px;
  }

  .nav-cta {
    padding: 7px 10px;
    font-size: 12px;
    gap: 4px;
  }

  .hero {
    min-height: 540px;
    padding: 100px 0 55px;
  }

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

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

  .hero-badge {
    font-size: 12px;
    padding: 5px 14px;
  }

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

  .stat-item + .stat-item::before {
    display: none;
  }

  .stat-num {
    font-size: 34px;
  }

  .section-head {
    margin-bottom: 36px;
  }

  .section-head h2 {
    font-size: 24px;
  }

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

  .btn-primary,
  .btn-ghost {
    padding: 12px 24px;
    font-size: 14px;
  }
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
        :root {
            --primary: #0e3a5d;
            --primary-dark: #08263f;
            --primary-light: #1b5a8a;
            --accent: #e8a93c;
            --accent-dark: #d18f1f;
            --bg-body: #f4f7fb;
            --bg-white: #ffffff;
            --bg-soft: #eef3f9;
            --text-main: #1c2b3a;
            --text-weak: #5f7386;
            --border-line: #e2eaf2;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 12px 34px rgba(14, 58, 93, 0.08);
            --shadow-hover: 0 18px 42px rgba(14, 58, 93, 0.14);
            --shadow-nav: 0 10px 30px rgba(8, 38, 63, 0.12);
            --space-section: 88px;
            --space-section-mobile: 56px;
            --font-main: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, sans-serif;
        }

        /* ============ 基础 Reset ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.35;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ 顶部 Dock 导航 ============ */
        .site-header {
            position: sticky;
            top: 18px;
            z-index: 100;
            padding: 0 20px;
        }
        .nav-wrap {
            max-width: 1080px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.7);
            border-radius: 60px;
            padding: 10px 24px 10px 20px;
            box-shadow: var(--shadow-nav);
            transition: box-shadow 0.3s ease;
        }
        .nav-wrap:hover {
            box-shadow: 0 14px 38px rgba(8, 38, 63, 0.16);
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 800;
            color: var(--primary-dark);
            white-space: nowrap;
            letter-spacing: -0.01em;
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-size: 15px;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            transition: background 0.25s ease, color 0.25s ease;
        }
        .nav-link:hover {
            background: var(--bg-soft);
            color: var(--primary);
        }
        .nav-link.active {
            background: var(--primary);
            color: #ffffff;
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 9px 20px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 700;
            white-space: nowrap;
            transition: background 0.25s ease, transform 0.2s ease;
        }
        .nav-cta:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
        }
        .nav-cta:focus-visible,
        .nav-link:focus-visible,
        .brand:focus-visible {
            outline: 3px solid rgba(232, 169, 60, 0.5);
            outline-offset: 2px;
        }

        /* ============ 页内 Banner ============ */
        .page-banner {
            position: relative;
            padding: 100px 0 90px;
            background: linear-gradient(135deg, rgba(8, 38, 63, 0.88) 0%, rgba(14, 58, 93, 0.72) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            margin-top: 10px;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to bottom, transparent, var(--bg-body));
            pointer-events: none;
        }
        .banner-inner {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.02em;
            margin-bottom: 22px;
        }
        .page-banner h1 {
            font-size: 40px;
            font-weight: 800;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
        }
        .page-banner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.9);
            max-width: 620px;
            margin-bottom: 28px;
        }
        .banner-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
        }
        .banner-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ============ 通用板块 ============ */
        .section {
            padding: var(--space-section) 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 50px;
        }
        .section-head .eyebrow {
            display: inline-block;
            background: rgba(232, 169, 60, 0.14);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.05em;
            padding: 5px 14px;
            border-radius: 30px;
            margin-bottom: 16px;
        }
        .section-head h2 {
            font-size: 32px;
            color: var(--primary-dark);
            margin-bottom: 12px;
        }
        .section-head p {
            color: var(--text-weak);
            font-size: 16px;
        }

        /* ============ 指标数据卡 ============ */
        .metric-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: -60px;
            position: relative;
            z-index: 5;
        }
        .metric-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 30px 26px;
            text-align: center;
            border: 1px solid var(--border-line);
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .metric-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .metric-card .num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .metric-card .label {
            font-size: 15px;
            color: var(--text-weak);
            margin-top: 6px;
        }
        .metric-card .sub {
            font-size: 13px;
            color: var(--accent-dark);
            margin-top: 2px;
            font-weight: 500;
        }

        /* ============ 四步流程 ============ */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            border: 1px solid var(--border-line);
            position: relative;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .step-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 18px;
        }
        .step-card h3 {
            font-size: 17px;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.65;
        }

        /* ============ 功能卡片网格 ============ */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-line);
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card .card-media {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .feature-card .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .feature-card:hover .card-media img {
            transform: scale(1.05);
        }
        .card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(8, 38, 63, 0.82);
            color: #fff;
            padding: 5px 14px;
            border-radius: 30px;
            font-size: 12px;
            font-weight: 500;
            backdrop-filter: blur(6px);
            letter-spacing: 0.02em;
        }
        .card-body {
            padding: 24px 26px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 18px;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            flex: 1;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            margin-top: 16px;
            transition: gap 0.2s ease, color 0.2s ease;
        }
        .card-link:hover {
            gap: 10px;
            color: var(--accent-dark);
        }

        /* ============ 资讯列表 ============ */
        .content-list-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            align-items: start;
        }
        .list-feature {
            background: var(--primary-dark);
            border-radius: var(--radius-lg);
            color: #fff;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .list-feature img {
            border-radius: 0;
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .list-feature .feature-body {
            padding: 26px;
        }
        .list-feature .badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 30px;
            margin-bottom: 14px;
        }
        .list-feature h3 {
            font-size: 20px;
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .list-feature p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 18px;
        }
        .list-feature .meta {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .list-side {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .list-row {
            background: var(--bg-white);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            display: flex;
            align-items: center;
            gap: 18px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .list-row:hover {
            border-color: rgba(14, 58, 93, 0.3);
            box-shadow: var(--shadow-card);
        }
        .list-row .row-img {
            width: 72px;
            height: 72px;
            border-radius: 12px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .list-row .row-body {
            flex: 1;
            min-width: 0;
        }
        .list-row .row-tag {
            font-size: 12px;
            color: var(--accent-dark);
            font-weight: 600;
            margin-bottom: 4px;
            display: block;
        }
        .list-row h4 {
            font-size: 15px;
            color: var(--primary-dark);
            margin-bottom: 4px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .list-row .row-date {
            font-size: 12px;
            color: var(--text-weak);
        }

        /* ============ FAQ ============ */
        .faq-wrap {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow 0.25s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card);
        }
        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-dark);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: background 0.2s ease;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 13px;
            color: var(--accent-dark);
            margin-left: auto;
            transition: transform 0.3s ease;
        }
        .faq-item[open] summary {
            background: var(--bg-soft);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.75;
            border-top: 1px solid var(--border-line);
            padding-top: 16px;
        }

        /* ============ CTA 区域 ============ */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            border-radius: var(--radius-lg);
            padding: 60px 50px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 220px;
            height: 220px;
            background: rgba(232, 169, 60, 0.16);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 28px;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 15px;
        }
        .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 700;
            transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .btn-primary:hover {
            background: #fff;
            color: var(--primary);
            transform: translateY(-3px);
        }
        .btn-outline {
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            background: transparent;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-3px);
        }
        .btn:focus-visible {
            outline: 3px solid rgba(232, 169, 60, 0.7);
            outline-offset: 3px;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 64px 0 30px;
            margin-top: 88px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.65);
            max-width: 360px;
        }
        .footer-links h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 16px;
        }
        .footer-links a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            padding: 5px 0;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 6px;
        }
        .footer-links a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .footer-bottom {
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ============ 响应式断点 ============ */
        @media (max-width: 1024px) {
            .metric-grid {
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .content-list-wrap {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--space-section-mobile) 0;
            }
            .page-banner {
                padding: 66px 0 70px;
            }
            .page-banner h1 {
                font-size: 30px;
            }
            .metric-grid {
                grid-template-columns: 1fr;
                margin-top: -40px;
                gap: 16px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .nav-wrap {
                padding: 8px 16px 8px 14px;
                gap: 10px;
            }
            .brand {
                font-size: 15px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 13px;
            }
            .nav-link {
                padding: 7px 13px;
                font-size: 13px;
            }
            .nav-cta {
                padding: 8px 14px;
                font-size: 13px;
            }
            .cta-section {
                padding: 44px 28px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .site-header {
                top: 10px;
                padding: 0 12px;
            }
            .nav-wrap {
                border-radius: 40px;
                padding: 8px 12px;
                gap: 6px;
            }
            .brand {
                font-size: 13px;
            }
            .brand-icon {
                width: 28px;
                height: 28px;
                font-size: 12px;
            }
            .main-nav {
                gap: 2px;
            }
            .nav-link {
                padding: 6px 10px;
                font-size: 12px;
            }
            .nav-cta {
                padding: 7px 10px;
                font-size: 12px;
            }
            .nav-cta span {
                display: none;
            }
            .page-banner h1 {
                font-size: 25px;
            }
            .page-banner p {
                font-size: 15px;
            }
            .section-head h2 {
                font-size: 25px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1;
            }
            .list-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .list-row .row-img {
                width: 100%;
                height: 160px;
            }
            .btn {
                padding: 12px 22px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
            .cta-btns {
                flex-direction: column;
            }
        }

/* roulang page: article */
:root {
  --primary: #0b1f3a;
  --primary-light: #1d3a5f;
  --primary-dark: #071526;
  --accent: #d4a853;
  --accent-light: #e8c878;
  --accent-dark: #b8913f;
  --bg: #f4f6fa;
  --card: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 30px rgba(11, 31, 58, 0.08);
  --shadow-lg: 0 18px 44px rgba(11, 31, 58, 0.12);
  --transition: all 0.3s ease;
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5 { line-height: 1.3; font-weight: 700; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ==== Button / Tag / Badge ==== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: var(--transition);
  line-height: 1.4;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(11, 31, 58, 0.25);
}
.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(11, 31, 58, 0.3);
}
.btn-accent {
  background: var(--accent);
  color: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(212, 168, 83, 0.35);
}
.btn-accent:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 168, 83, 0.4);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  transform: translateY(-2px);
}
.btn:focus-visible {
  outline: 3px solid rgba(212, 168, 83, 0.5);
  outline-offset: 2px;
}

.tag {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(212, 168, 83, 0.12);
  color: var(--accent-dark);
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid rgba(212, 168, 83, 0.25);
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: var(--primary);
  color: var(--accent);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(11, 31, 58, 0.2);
}

/* ==== Header / Dock Nav ==== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 20px 0;
}
.nav-wrap {
  max-width: 1180px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px 12px 24px;
  box-shadow: 0 10px 34px rgba(11, 31, 58, 0.08);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
}
.brand:hover { color: var(--primary-light); }
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 18px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.nav-link:hover { color: var(--primary); background: rgba(11, 31, 58, 0.06); }
.nav-link.active { color: var(--primary); background: rgba(11, 31, 58, 0.08); font-weight: 600; }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  padding: 9px 22px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(11, 31, 58, 0.22);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(11, 31, 58, 0.28);
}

/* ==== Article Hero ==== */
.article-hero {
  position: relative;
  padding: 120px 0 70px;
  background: linear-gradient(135deg, rgba(11, 31, 58, 0.96), rgba(23, 52, 92, 0.92)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
  margin-bottom: -30px;
}
.article-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 168, 83, 0.2), transparent 70%);
  pointer-events: none;
}
.article-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.breadcrumb a { color: rgba(255, 255, 255, 0.8); }
.breadcrumb a:hover { color: var(--accent-light); }
.breadcrumb .current { color: var(--accent-light); }
.breadcrumb .sep { opacity: 0.5; }
.article-hero-inner { max-width: 840px; position: relative; z-index: 1; }
.article-hero .tag { background: rgba(212, 168, 83, 0.18); color: var(--accent-light); border-color: rgba(212, 168, 83, 0.35); margin-bottom: 18px; }
.article-hero h1 { font-size: 38px; font-weight: 800; line-height: 1.25; margin-bottom: 18px; letter-spacing: -0.01em; }
.article-summary { font-size: 16px; color: rgba(255, 255, 255, 0.8); line-height: 1.9; max-width: 720px; }
.article-meta { display: flex; align-items: center; gap: 24px; margin-top: 28px; flex-wrap: wrap; }
.article-meta span { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: rgba(255, 255, 255, 0.75); }
.article-meta i { color: var(--accent); }

/* ==== Article Main ==== */
.article-main { padding: 70px 0 60px; position: relative; z-index: 2; }
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
}
.article-body {
  background: var(--card);
  border-radius: 20px;
  padding: 44px 48px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.article-body h2 {
  font-size: 26px;
  margin: 38px 0 16px;
  padding-left: 16px;
  border-left: 4px solid var(--accent);
  color: var(--primary);
}
.article-body h3 {
  font-size: 21px;
  margin: 28px 0 12px;
  color: var(--primary);
}
.article-body h4 { font-size: 18px; margin: 22px 0 10px; color: var(--primary); }
.article-body p { margin-bottom: 18px; line-height: 2; }
.article-body ul { padding-left: 24px; margin-bottom: 18px; list-style: disc; }
.article-body ol { padding-left: 24px; margin-bottom: 18px; list-style: decimal; }
.article-body li { margin-bottom: 8px; line-height: 1.9; }
.article-body img { border-radius: 14px; margin: 24px 0; box-shadow: var(--shadow); }
.article-body blockquote {
  border-left: 4px solid var(--accent);
  background: var(--bg);
  padding: 16px 24px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  color: var(--text-muted);
  font-style: italic;
}
.article-body pre {
  background: var(--primary-dark);
  color: #e2e8f0;
  padding: 24px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 24px 0;
  font-size: 14px;
  line-height: 1.7;
}
.article-body code {
  background: #f1f5f9;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.88em;
  color: #334155;
}
.article-body pre code { background: transparent; color: inherit; padding: 0; }
.article-body a { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 3px; }
.article-body a:hover { color: var(--accent); }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article-body th { background: var(--bg); font-weight: 700; text-align: left; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 12px 16px; }
.article-body hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }

/* ==== Not Found ==== */
.not-found { text-align: center; padding: 80px 20px; }
.not-found h2 { font-size: 32px; color: var(--primary); margin-bottom: 16px; border: none; padding: 0; }
.not-found p { color: var(--text-muted); margin-bottom: 28px; }

/* ==== Sidebar ==== */
.article-sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: 90px; }
.sidebar-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 26px;
  box-shadow: var(--shadow);
}
.about-card-img { border-radius: 12px; margin-bottom: 18px; height: 140px; width: 100%; object-fit: cover; }
.sidebar-card h3 { font-size: 17px; color: var(--primary); margin-bottom: 12px; }
.sidebar-card p { font-size: 14px; color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
.sidebar-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 600;
}
.sidebar-link:hover { gap: 12px; color: var(--accent); }
.cat-list { display: flex; flex-direction: column; gap: 4px; }
.cat-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
}
.cat-item:hover { background: rgba(11, 31, 58, 0.05); color: var(--primary); }
.cat-item i { width: 28px; height: 28px; background: rgba(11, 31, 58, 0.06); border-radius: 8px; display: inline-flex; align-items: center; justify-content: center; font-size: 13px; color: var(--accent-dark); }
.tip-card { background: linear-gradient(135deg, rgba(11, 31, 58, 0.04), rgba(212, 168, 83, 0.08)); }
.tip-card h3 { display: flex; align-items: center; gap: 8px; }
.tip-card h3 i { color: var(--accent); }

/* ==== Related / Latest ==== */
.related-section { padding: 70px 0 80px; }
.section-head { text-align: center; margin-bottom: 46px; }
.section-head h2 { font-size: 30px; color: var(--primary); margin-bottom: 8px; }
.section-head p { font-size: 15px; color: var(--text-muted); }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.related-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(212, 168, 83, 0.4);
}
.related-card-img { height: 190px; overflow: hidden; }
.related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .related-card-img img { transform: scale(1.05); }
.related-card-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.related-card-body .tag { align-self: flex-start; margin-bottom: 14px; }
.related-card-body h3 { font-size: 17px; color: var(--primary); margin-bottom: 10px; line-height: 1.5; }
.related-card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.8; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-meta { margin-top: auto; padding-top: 14px; font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.empty-tip { text-align: center; padding: 60px 20px; background: var(--card); border-radius: var(--radius); border: 1px dashed var(--border); color: var(--text-muted); font-size: 15px; }

/* ==== FAQ ==== */
.faq-section { padding: 70px 0 80px; background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.faq-list { max-width: 840px; margin: 0 auto; }
.faq-item {
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(212, 168, 83, 0.4); box-shadow: var(--shadow); }
.faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--primary);
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--accent); transition: var(--transition); }
.faq-item[open] summary i { transform: rotate(45deg); }
.faq-item .faq-answer { padding: 0 24px 20px; color: var(--text-muted); font-size: 15px; line-height: 1.9; }

/* ==== CTA ==== */
.cta-section { padding: 70px 0 80px; }
.cta-box {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 28px;
  padding: 60px 50px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -15%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 168, 83, 0.25), transparent 70%);
}
.cta-box h2 { font-size: 28px; margin-bottom: 14px; position: relative; z-index: 1; }
.cta-box p { color: rgba(255, 255, 255, 0.8); font-size: 16px; margin-bottom: 30px; position: relative; z-index: 1; }

/* ==== Footer ==== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 40px;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-logo i { color: var(--accent); }
.footer-brand p { font-size: 14px; line-height: 1.9; max-width: 320px; }
.footer-links h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.footer-links a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  padding: 6px 0;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--accent-light); padding-left: 6px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ==== Responsive ==== */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; flex-direction: row; flex-wrap: wrap; gap: 16px; }
  .sidebar-card { flex: 1; min-width: 250px; }
}

@media (max-width: 768px) {
  body { font-size: 15px; }
  .site-header { padding: 10px 14px 0; }
  .nav-wrap { padding: 10px 16px; border-radius: 50px; }
  .brand { font-size: 15px; }
  .brand-icon { width: 32px; height: 32px; font-size: 14px; }
  .nav-link { padding: 7px 12px; font-size: 13px; }
  .nav-cta { padding: 8px 16px; font-size: 13px; gap: 6px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .article-hero { padding: 100px 0 55px; }
  .article-hero h1 { font-size: 28px; }
  .article-body { padding: 28px 22px; }
  .article-body h2 { font-size: 22px; }
  .cta-box { padding: 44px 26px; }
  .cta-box h2 { font-size: 23px; }
  .related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .site-header { padding: 8px 10px 0; }
  .nav-wrap { padding: 8px 12px; border-radius: 40px; }
  .brand { gap: 8px; font-size: 14px; }
  .brand-icon { width: 28px; height: 28px; font-size: 12px; border-radius: 10px; }
  .nav-link { padding: 6px 9px; font-size: 12px; }
  .nav-cta { padding: 7px 12px; font-size: 12px; }
  .nav-cta i { display: none; }
  .article-hero { padding: 90px 0 45px; }
  .article-hero h1 { font-size: 23px; }
  .article-summary { font-size: 14px; }
  .article-meta { gap: 12px; }
  .article-meta span { font-size: 12px; }
  .article-body { padding: 22px 16px; border-radius: 14px; }
  .article-body h2 { font-size: 20px; margin-top: 28px; }
  .article-body blockquote { padding: 12px 16px; }
  .section-head h2 { font-size: 24px; }
  .related-card-img { height: 160px; }
  .faq-item summary { padding: 16px 18px; font-size: 14px; }
  .faq-answer { font-size: 14px; }
  .cta-box h2 { font-size: 20px; }
  .cta-box p { font-size: 14px; }
  .footer-grid { gap: 24px; }
}

/* focus 可访问性 */
a:focus-visible, summary:focus-visible, .btn:focus-visible {
  outline: 3px solid rgba(212, 168, 83, 0.5);
  outline-offset: 2px;
}