/* roulang page: index */
:root {
  --primary: #5B8DB8;
  --primary-dark: #3E6C94;
  --primary-light: rgba(91, 141, 184, 0.12);
  --primary-soft: rgba(91, 141, 184, 0.06);
  --accent: #D9A75B;
  --bg: #F5F8FA;
  --bg-alt: #EBF1F5;
  --bg-footer: #E8EEF4;
  --text-main: #1E2A32;
  --text-sub: #5C6B7A;
  --text-weak: #8A97A5;
  --border: #C9D3DC;
  --border-light: rgba(20, 40, 60, 0.06);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-light: 0 4px 16px rgba(26, 54, 82, 0.07);
  --shadow-hover: 0 8px 30px rgba(26, 54, 82, 0.12);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 60px;
  --space-7: 88px;
  --font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

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

button,
input {
  font-family: inherit;
}

.container {
  max-width: 1200px;
  padding-left: 24px;
  padding-right: 24px;
}

:focus-visible {
  outline: 3px solid rgba(91, 141, 184, 0.35);
  outline-offset: 2px;
}

/* ===== 按钮体系 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  text-decoration: none;
  cursor: pointer;
}

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

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

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-light);
}

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

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

.btn-outline:active {
  background: var(--primary-soft);
}

.btn-lg {
  min-height: 52px;
  padding: 0 34px;
  font-size: 16px;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--border-light);
  box-shadow: var(--shadow-hover);
}

.header-top {
  border-bottom: 1px solid rgba(20, 40, 60, 0.04);
}

.header-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-mark {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: #ffffff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.header-search {
  position: relative;
  width: 280px;
}

.header-search input {
  width: 100%;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0 44px 0 16px;
  background: #ffffff;
  font-size: 14px;
  color: var(--text-main);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.header-search input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91, 141, 184, 0.18);
}

.header-search input::placeholder {
  color: #9AA7B4;
}

.header-search button {
  position: absolute;
  right: 4px;
  top: 4px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s;
}

.header-search button:hover {
  background: var(--primary-dark);
}

.navbar-toggler {
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}

.navbar-toggler span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: background 0.2s;
}

.navbar-toggler:hover span {
  background: var(--primary-dark);
}

.header-channels {
  background: rgba(237, 242, 246, 0.6);
  border-top: 1px solid rgba(20, 40, 60, 0.03);
}

.header-channels .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
}

.channel-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 44px;
}

.channel-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0 18px;
  height: 44px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  text-decoration: none;
  transition: color 0.2s;
  white-space: nowrap;
}

.channel-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.25s ease;
  border-radius: 2px;
}

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

.channel-link:hover::after {
  width: calc(100% - 24px);
}

.channel-link.active {
  color: var(--primary-dark);
  font-weight: 600;
}

.channel-link.active::after {
  width: calc(100% - 24px);
}

.channel-trends {
  display: flex;
  align-items: center;
  gap: 8px;
}

.trend-label {
  font-size: 13px;
  color: var(--text-weak);
  margin-right: 4px;
  white-space: nowrap;
}

.trend-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border-light);
  font-size: 13px;
  color: var(--text-sub);
  text-decoration: none;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.trend-tag:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary);
}

.mobile-menu {
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  padding: 20px 24px 24px;
}

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-link {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  border-bottom: 1px solid rgba(20, 40, 60, 0.05);
  text-decoration: none;
}

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

.mobile-search {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.mobile-search input {
  flex: 1;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 14px;
  font-size: 14px;
  background: #ffffff;
}

.mobile-search input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91, 141, 184, 0.18);
}

.mobile-search button {
  height: 40px;
  padding: 0 20px;
  border-radius: 8px;
  border: none;
  background: var(--primary);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: calc(100vh - 108px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  filter: saturate(0.9) brightness(0.98);
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 55%, rgba(222, 236, 246, 0.65));
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 0;
  width: 100%;
}

.hero h1 {
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 24px;
  max-width: 680px;
}

.hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-sub);
  max-width: 520px;
  margin-bottom: 32px;
}

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

.hero-scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: var(--text-weak);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.7);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-light);
  animation: heroScroll 2s ease-in-out infinite;
}

@keyframes heroScroll {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
    opacity: 0.5;
  }
  50% {
    transform: translateX(-50%) translateY(8px);
    opacity: 1;
  }
}

/* ===== 通用板块 ===== */
.section {
  padding: var(--space-7) 0;
}

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

.section-white {
  background: #ffffff;
}

.section-header {
  max-width: 640px;
  margin-bottom: var(--space-5);
}

.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-title {
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-main);
  margin-bottom: var(--space-2);
}

.section-desc {
  color: var(--text-sub);
  font-size: 16px;
  line-height: 1.75;
  margin-bottom: 0;
}

/* ===== 核心内容区 ===== */
.feature-section {
  background: #ffffff;
  padding: var(--space-7) 0;
}

.feature-list {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 1fr;
  gap: var(--space-6);
  align-items: start;
}

.feature-item:nth-child(2) {
  margin-top: var(--space-5);
}

.feature-item:nth-child(3) {
  margin-top: var(--space-3);
}

.feature-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  margin-bottom: var(--space-2);
  font-variant-numeric: tabular-nums;
}

.feature-item h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: var(--space-1);
}

.feature-item p {
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 0;
  max-width: 320px;
}

/* ===== 价值预览 ===== */
.value-section {
  padding: var(--space-7) 0;
  background: var(--bg);
}

.value-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: var(--space-3);
}

.value-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
}

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

.value-card .card-cover {
  height: 200px;
  overflow: hidden;
  position: relative;
}

.value-card .card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.25s ease;
}

.value-card:hover .card-cover img {
  transform: scale(1.02);
}

.value-card .card-body {
  padding: var(--space-3);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.value-card .card-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
  color: var(--text-main);
}

.value-card .card-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 0;
}

.value-card .card-link {
  margin-top: auto;
  padding-top: var(--space-2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary-dark);
}

.value-card .card-link i {
  font-size: 14px;
  transition: transform 0.2s;
}

.value-card:hover .card-link i {
  transform: translateX(3px);
}

/* ===== 服务流程 ===== */
.progress-section {
  padding: var(--space-7) 0;
  background: #ffffff;
}

.progress-track {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  position: relative;
  margin-top: var(--space-6);
}

.progress-track::before {
  content: '';
  position: absolute;
  top: 24px;
  left: 5%;
  right: 5%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary) 60%, var(--border) 60%, var(--border) 100%);
  border-radius: 2px;
}

.progress-item {
  position: relative;
  width: 22%;
  text-align: center;
  z-index: 1;
}

.progress-node {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-2);
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 0 0 6px var(--primary-light);
  font-variant-numeric: tabular-nums;
}

.progress-item.done .progress-node {
  background: var(--primary);
}

.progress-label {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}

.progress-desc {
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.5;
  max-width: 160px;
  margin: 0 auto;
}

/* ===== 最新动态 ===== */
.news-section {
  padding: var(--space-7) 0;
  background: var(--bg);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.news-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-light);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
}

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

.news-thumb {
  height: 180px;
  overflow: hidden;
  flex-shrink: 0;
}

.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.news-card:hover .news-thumb img {
  transform: scale(1.03);
}

.news-body {
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 12px;
  width: fit-content;
  line-height: 1.4;
}

.news-title {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 10px;
}

.news-title a {
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.2s;
}

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

.news-excerpt {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-2);
}

.news-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-weak);
  border-top: 1px solid rgba(20, 40, 60, 0.05);
  padding-top: 14px;
}

.read-more {
  color: var(--primary-dark);
  text-decoration: none;
  font-weight: 500;
  white-space: nowrap;
}

.read-more:hover {
  text-decoration: underline;
  color: var(--primary);
}

.pagination-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: var(--space-5);
}

.page-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  background: #ffffff;
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-sub);
  text-decoration: none;
  transition: all 0.2s;
}

.page-item.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  font-weight: 600;
}

.page-item.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.page-item:not(.disabled):not(.active):hover {
  border-color: var(--primary);
  color: var(--primary-dark);
}

/* ===== 空状态 ===== */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 24px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
}

.empty-state .empty-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
}

.empty-state p {
  font-size: 15px;
  color: var(--text-sub);
  margin: 0;
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-7) 0;
  background: #ffffff;
}

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

.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  background: #ffffff;
  overflow: hidden;
  box-shadow: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

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

.accordion-item:has(.accordion-button:not(.collapsed)) {
  border-color: var(--primary);
  box-shadow: var(--shadow-light);
}

.accordion-header {
  margin: 0;
}

.accordion-button {
  width: 100%;
  text-align: left;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-main);
  background: #ffffff;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

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

.accordion-button:not(.collapsed) {
  color: var(--primary-dark);
  background: var(--primary-soft);
  border-bottom: 1px solid rgba(20, 40, 60, 0.05);
}

.accordion-button::after {
  content: '';
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%235C6B7A' viewBox='0 0 16 16'%3E%3Cpath d='M8 1a1 1 0 0 1 1 1v5h5a1 1 0 1 1 0 2H9v5a1 1 0 1 1-2 0V9H2a1 1 0 0 1 0-2h5V2a1 1 0 0 1 1-1z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: 16px;
  transition: transform 0.2s ease;
}

.accordion-button:not(.collapsed)::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%233E6C94' viewBox='0 0 16 16'%3E%3Cpath d='M2 8a1 1 0 0 1 1-1h10a1 1 0 1 1 0 2H3a1 1 0 0 1-1-1z'/%3E%3C/svg%3E");
  transform: rotate(180deg);
}

.accordion-body {
  padding: 20px;
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
  background: #ffffff;
}

.accordion-body p:last-child {
  margin-bottom: 0;
}

/* ===== CTA 带 ===== */
.cta-band {
  padding: 72px 0;
  background: var(--bg-alt);
  text-align: center;
}

.cta-band h2 {
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: var(--space-2);
}

.cta-band p {
  color: var(--text-sub);
  font-size: 16px;
  max-width: 420px;
  margin: 0 auto var(--space-4);
}

.cta-band .btn {
  min-width: 160px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-footer);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid rgba(20, 40, 60, 0.08);
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 260px;
  margin-bottom: 0;
}

.footer-links h3,
.footer-contact h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: var(--space-2);
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 10px;
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-contact p {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 8px;
  line-height: 1.6;
}

.footer-contact i {
  color: var(--primary);
  margin-right: 6px;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-weak);
}

.footer-bottom span {
  margin: 0 4px;
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
  .value-grid {
    grid-template-columns: 1.2fr 1fr;
  }

  .value-card:first-child {
    grid-column: 1 / -1;
  }

  .value-card:first-child .card-cover {
    height: 240px;
  }

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

  .feature-list {
    gap: var(--space-5);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .progress-track {
    gap: 16px;
  }

  .progress-desc {
    font-size: 12px;
  }
}

@media (max-width: 767.98px) {
  .section {
    padding: 56px 0;
  }

  .hero {
    min-height: 80vh;
  }

  .hero h1 {
    font-size: clamp(1.6rem, 5vw, 2rem);
    line-height: 1.35;
  }

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

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

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

  .feature-list {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .feature-item:nth-child(2),
  .feature-item:nth-child(3) {
    margin-top: 0;
  }

  .feature-item p {
    max-width: none;
  }

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

  .value-card:first-child {
    grid-column: auto;
  }

  .value-card:first-child .card-cover {
    height: 200px;
  }

  .progress-track {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-left: 0;
  }

  .progress-track::before {
    display: none;
  }

  .progress-item {
    width: 100%;
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    text-align: left;
    padding: 0 0 28px;
  }

  .progress-node {
    margin: 0;
    flex-shrink: 0;
  }

  .progress-label {
    font-size: 15px;
    margin-bottom: 2px;
  }

  .progress-desc {
    margin: 0;
    max-width: none;
    font-size: 13px;
  }

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

  .news-thumb {
    height: 200px;
  }

  .cta-band {
    padding: 56px 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .footer-bottom {
    text-align: center;
    line-height: 1.6;
  }
}

@media (max-width: 575.98px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .header-top-inner {
    height: 56px;
  }

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

  .logo-mark {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .news-body {
    padding: 20px;
  }

  .value-card .card-body {
    padding: 20px;
  }

  .accordion-button {
    font-size: 15px;
    padding: 16px 16px;
  }

  .accordion-body {
    padding: 16px;
    font-size: 14px;
  }

  .cta-band h2 {
    font-size: 1.4rem;
  }
}

/* roulang page: category1 */
:root {
            --primary: #5B8DB8;
            --primary-dark: #3E6C94;
            --primary-light: #EAF1F6;
            --accent: #D9A75B;
            --accent-light: #F9F2E7;
            --bg-body: #F5F8FA;
            --bg-band: #EBF1F5;
            --text-main: #1E2A32;
            --text-sub: #5C6B7A;
            --text-weak: #8A97A5;
            --border: #DDE4EA;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 16px rgba(26, 54, 82, 0.07);
            --shadow-hover: 0 8px 30px rgba(26, 54, 82, 0.12);
            --font-stack: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.75;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-dark);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            border: 0;
            vertical-align: middle;
        }
        .container {
            max-width: 1200px;
        }

        /* ============ 吸顶导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid transparent;
            transition: box-shadow .3s ease, border-color .3s ease;
        }
        .site-header.is-sticky {
            border-color: var(--border);
            box-shadow: 0 4px 20px rgba(26, 54, 82, 0.08);
        }
        .header-top-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 56px;
            gap: 16px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 14px;
            border-radius: 10px;
            letter-spacing: .5px;
            transition: background .25s ease;
        }
        .brand:hover .brand-mark {
            background: var(--primary-dark);
        }
        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 1px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border);
            border-radius: 999px;
            overflow: hidden;
            height: 36px;
            padding: 0 4px 0 14px;
            transition: border-color .2s ease, box-shadow .2s ease;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(91, 141, 184, 0.18);
        }
        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: var(--text-main);
            width: 180px;
        }
        .search-box input::placeholder {
            color: #9AA7B4;
        }
        .search-box button {
            border: none;
            background: var(--primary);
            color: #fff;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            padding: 0;
            transition: background .2s ease;
        }
        .search-box button:hover {
            background: var(--primary-dark);
        }
        .navbar-toggler {
            display: none;
            border: 1px solid var(--border);
            background: #fff;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            font-size: 20px;
            color: var(--text-main);
            align-items: center;
            justify-content: center;
            padding: 0;
            cursor: pointer;
            transition: border-color .2s ease, color .2s ease;
        }
        .navbar-toggler:hover {
            border-color: var(--primary);
            color: var(--primary-dark);
        }
        .navbar-toggler:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(91, 141, 184, 0.18);
        }

        .header-bottom {
            background: var(--bg-band);
            border-top: 1px solid #E2E8EE;
        }
        .header-bottom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 44px;
            gap: 20px;
        }
        .channel-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .channel-link {
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-radius: 0 0 8px 8px;
            border-bottom: 2px solid transparent;
            transition: color .2s ease, border-color .2s ease, background .2s ease;
        }
        .channel-link:hover,
        .channel-link.active {
            color: var(--primary-dark);
            border-bottom-color: var(--primary);
            background: rgba(255, 255, 255, .6);
        }
        .trend-tags {
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
            overflow: hidden;
        }
        .trend-label {
            font-size: 13px;
            color: var(--text-weak);
            margin-right: 2px;
            flex-shrink: 0;
        }
        .trend-tags a {
            display: inline-block;
            padding: 4px 12px;
            font-size: 13px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            color: var(--text-sub);
            transition: all .2s ease;
            flex-shrink: 0;
        }
        .trend-tags a:hover {
            color: var(--primary-dark);
            border-color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-search {
            display: none;
            width: 100%;
        }
        .mobile-search input {
            flex: 1;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0 14px;
            font-size: 14px;
            outline: none;
            background: #fff;
            color: var(--text-main);
        }
        .mobile-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(91, 141, 184, 0.18);
        }
        .mobile-search button {
            height: 40px;
            padding: 0 20px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            transition: background .2s ease;
        }
        .mobile-search button:hover {
            background: var(--primary-dark);
        }

        /* ============ 分类页 Hero ============ */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(245, 248, 250, 0.94) 55%, rgba(224, 236, 246, 0.82)), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            filter: saturate(0.9);
            padding: 56px 0 48px;
            border-bottom: 1px solid var(--border);
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb-nav {
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--text-sub);
        }
        .breadcrumb-nav a:hover {
            color: var(--primary-dark);
        }
        .breadcrumb-nav .sep {
            color: var(--border);
        }
        .breadcrumb-nav [aria-current="page"] {
            color: var(--text-main);
            font-weight: 500;
        }
        .category-hero h1 {
            font-size: clamp(1.9rem, 3.2vw, 2.4rem);
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 16px;
            letter-spacing: -0.01em;
        }
        .hero-desc {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 740px;
            line-height: 1.75;
            margin: 0 0 24px;
        }
        .filter-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 8px;
        }
        .filter-btn {
            display: inline-block;
            padding: 8px 20px;
            font-size: 14px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-sub);
            transition: all .2s ease;
            line-height: 1.5;
        }
        .filter-btn:hover {
            border-color: var(--primary);
            color: var(--primary-dark);
            background: var(--primary-light);
        }
        .filter-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        /* ============ 主内容区 ============ */
        .category-main {
            padding: 56px 0 40px;
        }
        .col-main {
            padding-right: 32px;
        }

        .feature-card {
            display: flex;
            flex-direction: column;
            background: #fff;
            border: 1px solid rgba(20, 40, 60, 0.06);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            margin-bottom: 32px;
            transition: transform .25s ease, box-shadow .25s ease;
        }
        .feature-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card .card-media {
            height: 200px;
            overflow: hidden;
            background: var(--bg-band);
        }
        .feature-card .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }
        .feature-card:hover .card-media img {
            transform: scale(1.02);
        }
        .feature-card .card-body {
            padding: 28px 32px;
        }
        .badge-cat {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 500;
            border-radius: 999px;
            background: var(--primary-light);
            color: var(--primary-dark);
            margin-bottom: 12px;
            letter-spacing: .02em;
        }
        .feature-card h2 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 12px;
            line-height: 1.45;
        }
        .feature-card .card-summary {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0 0 16px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-weak);
        }
        .card-meta .divider {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: #C9D3DC;
            display: inline-block;
        }
        .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-dark);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s ease, color .2s ease;
        }
        .read-more:hover {
            color: var(--primary);
            gap: 8px;
        }

        .list-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 28px 0;
            border-bottom: 1px solid #E8EDF2;
            transition: background .2s ease;
        }
        .list-item:first-of-type {
            padding-top: 8px;
        }
        .list-item:last-of-type {
            border-bottom: none;
        }
        .list-item:hover .list-title {
            color: var(--primary-dark);
        }
        .list-thumb {
            flex-shrink: 0;
            width: 140px;
            height: 84px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg-band);
        }
        .list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }
        .list-item:hover .list-thumb img {
            transform: scale(1.04);
        }
        .list-content {
            flex: 1;
            min-width: 0;
        }
        .list-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.5;
            transition: color .2s ease;
        }
        .list-summary {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.65;
            margin: 0 0 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .list-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-weak);
        }
        .list-meta .dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: #C9D3DC;
            display: inline-block;
        }

        .pagination-wrap {
            display: flex;
            justify-content: center;
            margin-top: 40px;
            gap: 6px;
        }
        .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            border: 1px solid var(--border);
            color: var(--text-sub);
            background: #fff;
            border-radius: 8px;
            font-size: 14px;
            transition: all .2s ease;
        }
        .page-btn:hover {
            border-color: var(--primary);
            color: var(--primary-dark);
            background: var(--primary-light);
        }
        .page-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            font-weight: 500;
        }
        .page-btn.disabled {
            opacity: .5;
            pointer-events: none;
        }

        /* ============ 侧栏 ============ */
        .col-side {
            padding-left: 16px;
        }
        .side-widget {
            background: #fff;
            border: 1px solid rgba(20, 40, 60, 0.06);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 24px;
            margin-bottom: 24px;
        }
        .side-widget h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid #E8EDF2;
            position: relative;
        }
        .side-widget h3::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -1px;
            width: 32px;
            height: 2px;
            background: var(--primary);
        }
        .side-search {
            display: flex;
            gap: 8px;
        }
        .side-search input {
            flex: 1;
            border: 1px solid var(--border);
            border-radius: 8px;
            height: 40px;
            padding: 0 14px;
            font-size: 14px;
            outline: none;
            color: var(--text-main);
            background: var(--bg-body);
            transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
        }
        .side-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(91, 141, 184, 0.18);
            background: #fff;
        }
        .side-search button {
            border: none;
            background: var(--primary);
            color: #fff;
            width: 42px;
            height: 40px;
            border-radius: 8px;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background .2s ease;
        }
        .side-search button:hover {
            background: var(--primary-dark);
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-cloud a {
            display: inline-block;
            padding: 5px 14px;
            font-size: 13px;
            border-radius: 999px;
            background: var(--bg-body);
            border: 1px solid var(--border);
            color: var(--text-sub);
            transition: all .2s ease;
            line-height: 1.5;
        }
        .tag-cloud a:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
        }
        .recommend-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid rgba(20, 40, 60, 0.06);
            background: #fff;
            transition: box-shadow .25s ease, transform .25s ease;
        }
        .recommend-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .recommend-card .rec-img {
            height: 140px;
            overflow: hidden;
            background: var(--bg-band);
        }
        .recommend-card .rec-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }
        .recommend-card:hover .rec-img img {
            transform: scale(1.03);
        }
        .recommend-card .rec-body {
            padding: 16px;
        }
        .recommend-card .rec-title {
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 8px;
            line-height: 1.5;
            color: var(--text-main);
        }
        .recommend-card .rec-desc {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.6;
            margin: 0 0 12px;
        }

        /* ============ FAQ ============ */
        .faq-section {
            padding: 72px 0;
            background: var(--bg-band);
        }
        .faq-section .section-head {
            text-align: center;
            margin-bottom: 44px;
        }
        .faq-section h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.9rem);
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .faq-section .section-sub {
            color: var(--text-sub);
            max-width: 560px;
            margin: 0 auto;
            font-size: 15px;
        }
        .accordion-item {
            border: 1px solid rgba(20, 40, 60, 0.06);
            border-radius: var(--radius-md) !important;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: #fff;
        }
        .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            padding: 20px 24px;
            background: #fff;
            border: none;
            line-height: 1.5;
            transition: background .2s ease, color .2s ease;
        }
        .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary-dark);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(91, 141, 184, 0.18);
            border-color: var(--primary);
        }
        .accordion-button::after {
            font-family: 'bootstrap-icons';
            content: "\F64D";
            background: none;
            font-size: 18px;
            color: var(--primary);
            transition: transform .3s ease;
            flex-shrink: 0;
            width: auto;
            height: auto;
            line-height: 1;
        }
        .accordion-button:not(.collapsed)::after {
            content: "\F646";
            transform: rotate(0deg);
        }
        .accordion-body {
            padding: 0 24px 24px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: 64px 0;
            background: var(--primary-light);
            text-align: center;
            border-top: 1px solid rgba(20, 40, 60, 0.04);
        }
        .cta-section h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.9rem);
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .cta-section .cta-desc {
            color: var(--text-sub);
            max-width: 520px;
            margin: 0 auto 28px;
            font-size: 15px;
            line-height: 1.7;
        }
        .btn-main {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 36px;
            font-size: 16px;
            font-weight: 500;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            border: none;
            min-height: 44px;
            transition: all .25s ease;
            cursor: pointer;
        }
        .btn-main:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            color: #fff;
        }
        .btn-main:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(91, 141, 184, 0.3);
        }
        .btn-main:active {
            transform: translateY(0);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 11px 32px;
            font-size: 15px;
            font-weight: 500;
            border-radius: 10px;
            background: #fff;
            color: var(--primary-dark);
            border: 1px solid var(--primary);
            min-height: 44px;
            transition: all .25s ease;
            cursor: pointer;
        }
        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }
        .btn-outline:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(91, 141, 184, 0.18);
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-contact {
            margin-top: 20px;
            font-size: 14px;
            color: var(--text-weak);
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-band);
            padding: 56px 0 0;
            border-top: 1px solid var(--border);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 13px;
            border-radius: 9px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0;
            max-width: 260px;
        }
        .footer-links h3,
        .footer-contact h3 {
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 16px;
            color: var(--text-main);
        }
        .footer-links a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: var(--text-sub);
            transition: color .2s ease, padding-left .2s ease;
        }
        .footer-links a:hover {
            color: var(--primary-dark);
            padding-left: 4px;
        }
        .footer-contact p {
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-weak);
            flex-wrap: wrap;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 991.98px) {
            .navbar-toggler {
                display: inline-flex;
            }
            .search-box input {
                width: 130px;
            }
            .mobile-search {
                display: flex;
            }
            .header-bottom .container {
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
            }
            .channel-nav {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                gap: 4px;
            }
            .channel-link {
                padding: 12px 16px;
                border-radius: 8px;
                border-bottom: none;
                font-size: 14px;
            }
            .channel-link:hover,
            .channel-link.active {
                background: var(--primary-light);
                border-bottom: none;
            }
            .trend-tags {
                display: none;
            }
            .col-main {
                padding-right: calc(var(--bs-gutter-x) * .5);
            }
            .col-side {
                padding-left: calc(var(--bs-gutter-x) * .5);
                margin-top: 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 767.98px) {
            .category-hero {
                padding: 40px 0 32px;
            }
            .category-main {
                padding-top: 40px;
            }
            .list-item {
                flex-direction: column;
                gap: 12px;
            }
            .list-thumb {
                width: 100%;
                height: 160px;
            }
            .feature-card .card-body {
                padding: 20px;
            }
            .feature-card .card-media {
                height: 180px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .faq-section {
                padding: 56px 0;
            }
            .cta-section {
                padding: 48px 0;
            }
        }
        @media (max-width: 575.98px) {
            .header-top-inner {
                height: 52px;
            }
            .search-box {
                display: none;
            }
            .brand-name {
                font-size: 18px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .hero-desc {
                font-size: 15px;
            }
            .filter-row {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 8px;
                -webkit-overflow-scrolling: touch;
            }
            .filter-btn {
                white-space: nowrap;
            }
            .feature-card h2 {
                font-size: 19px;
            }
            .list-title {
                font-size: 17px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-main,
            .btn-outline {
                width: 100%;
                max-width: 280px;
            }
        }

/* roulang page: article */
:root {
  --color-primary: #5B8DB8;
  --color-primary-dark: #3E6C94;
  --color-primary-light: #EDF2F6;
  --color-accent: #D9A75B;
  --color-bg: #F5F8FA;
  --color-surface: #FFFFFF;
  --color-border: #E8EEF4;
  --color-text: #1E2A32;
  --color-text-secondary: #5C6B7A;
  --color-text-light: #8A97A5;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 4px 16px rgba(26, 54, 82, 0.07);
  --shadow-hover: 0 8px 30px rgba(26, 54, 82, 0.12);
  --space-unit: 20px;
  --font-stack: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease; }
button, input, textarea { font-family: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid rgba(91, 141, 184, 0.45);
  outline-offset: 2px;
}
.container { max-width: 1200px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.text-muted { color: var(--color-text-light) !important; }
.text-primary { color: var(--color-primary-dark) !important; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #FFFFFF;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn-outline-primary {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}
.btn-outline-primary:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  transform: translateY(-2px);
}
.btn-lg { min-height: 48px; padding: 12px 36px; font-size: 16px; }

/* 导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: inset 0 -1px 0 rgba(20, 40, 60, 0.05), 0 2px 12px rgba(26, 54, 82, 0.04);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(26, 54, 82, 0.07); }
.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 12px 0;
}
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: 9px;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-sm);
}
.logo-text { color: var(--color-text); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.header-search { position: relative; display: block; }
.header-search input {
  width: 260px;
  height: 38px;
  border: 1px solid #C9D3DC;
  border-radius: 999px;
  padding: 0 44px 0 16px;
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}
.header-search input::placeholder { color: #9AA7B4; }
.header-search input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #FFFFFF;
  box-shadow: 0 0 0 4px rgba(91, 141, 184, 0.18);
}
.header-search button {
  position: absolute;
  right: 3px;
  top: 3px;
  width: 32px;
  height: 32px;
  border: none;
  background: var(--color-primary);
  color: #FFFFFF;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s ease;
}
.header-search button:hover { background: var(--color-primary-dark); }
.nav-toggler {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid #C9D3DC;
  background: #FFFFFF;
  color: var(--color-text);
  border-radius: 10px;
  font-size: 20px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.nav-toggler:hover { border-color: var(--color-primary); background: var(--color-primary-light); }
.header-bottom {
  border-top: 1px solid rgba(20, 40, 60, 0.04);
  background: #EDF2F6;
}
.header-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.channel-nav {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
}
.channel-link {
  display: inline-block;
  padding: 13px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-bottom: 2px solid transparent;
  border-radius: 0;
  transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease;
  position: relative;
}
.channel-link:hover {
  color: var(--color-primary-dark);
  background: rgba(255, 255, 255, 0.55);
}
.channel-link.active {
  color: var(--color-primary-dark);
  font-weight: 600;
  border-bottom-color: var(--color-primary);
}
.hot-tags {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
  flex-wrap: nowrap;
  overflow: hidden;
}
.hot-label {
  font-size: 12px;
  color: var(--color-text-light);
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 2px 10px;
  white-space: nowrap;
}
.hot-tag {
  font-size: 12px;
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.6);
  border-radius: 999px;
  padding: 3px 12px;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}
.hot-tag:hover {
  background: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}
.mobile-search { display: none; padding: 12px 16px 4px; }
.mobile-search form { display: flex; align-items: center; gap: 8px; }
.mobile-search input {
  flex: 1;
  height: 38px;
  border: 1px solid #C9D3DC;
  border-radius: 999px;
  padding: 0 14px;
  font-size: 14px;
  background: var(--color-bg);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.mobile-search input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #FFFFFF;
  box-shadow: 0 0 0 4px rgba(91, 141, 184, 0.18);
}
.mobile-search button {
  width: 38px;
  height: 38px;
  border: none;
  background: var(--color-primary);
  color: #FFFFFF;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s ease;
}
.mobile-search button:hover { background: var(--color-primary-dark); }

/* 面包屑 */
.breadcrumb-wrap {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}
.breadcrumb {
  margin: 0;
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
}
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  padding: 0 10px;
  color: var(--color-text-light);
}
.breadcrumb-item a { color: var(--color-text-secondary); }
.breadcrumb-item a:hover { color: var(--color-primary-dark); }
.breadcrumb-item.active {
  color: var(--color-text-light);
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 文章主体 */
.article-main {
  background: var(--color-surface);
  padding: 60px 0 80px;
}
.article-container {
  max-width: 780px;
  margin: 0 auto;
}
.article-head {
  margin-bottom: 36px;
}
.category-badge {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 13px;
  font-weight: 500;
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}
.article-head h1 {
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
  margin: 0 0 24px;
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 24px;
  font-size: 14px;
  color: var(--color-text-light);
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.article-body {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.article-body p {
  margin: 0 0 1.2em;
  line-height: 1.75;
}
.article-body h2 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 2em 0 0.6em;
  line-height: 1.4;
}
.article-body h3 {
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 1.8em 0 0.5em;
  line-height: 1.4;
}
.article-body a {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}
.article-body a:hover { color: var(--color-primary); }
.article-body img {
  border-radius: var(--radius-md);
  max-width: 100%;
  height: auto;
  box-shadow: var(--shadow-sm);
}
.article-body ul, .article-body ol { margin: 1em 0 1.2em; padding-left: 1.4em; }
.article-body li { margin-bottom: 0.5em; line-height: 1.7; }
.article-body blockquote {
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  margin: 1.5em 0;
  color: var(--color-text-secondary);
  font-size: 15px;
}
.article-body code {
  background: var(--color-primary-light);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.article-body pre {
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 1.5em 0;
}
.article-body pre code {
  background: transparent;
  padding: 0;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
}
.article-body th, .article-body td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
  font-size: 15px;
}
.article-body th {
  background: var(--color-primary-light);
  font-weight: 600;
}

/* 标签 */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.tags-label {
  font-size: 14px;
  color: var(--color-text-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: 4px;
}
.tag-pill {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-text-secondary);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 13px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}
.tag-pill:hover {
  background: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

/* 上下篇 */
.article-pager {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.pager-item {
  flex: 1;
  max-width: calc(50% - 12px);
  min-height: 70px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  transition: background 0.25s ease, box-shadow 0.25s ease;
}
.pager-item:hover { background: var(--color-primary-light); box-shadow: var(--shadow-sm); }
.pager-label {
  display: block;
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 6px;
  line-height: 1.4;
}
.pager-title {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.pager-title:hover { color: var(--color-primary-dark); }
.pager-empty {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* 空状态 */
.article-empty {
  background: var(--color-surface);
  padding: 90px 20px;
  min-height: calc(70vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.empty-state {
  text-align: center;
  max-width: 420px;
  margin: 0 auto;
  padding: 60px 40px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.empty-state i.bi {
  font-size: 48px;
  color: var(--color-text-light);
  display: block;
  margin-bottom: 20px;
}
.empty-state h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 12px;
}
.empty-state p {
  color: var(--color-text-secondary);
  font-size: 15px;
  margin-bottom: 28px;
}

/* 相关推荐 */
.related-section {
  background: var(--color-bg);
  padding: 60px 0;
  border-top: 1px solid var(--color-border);
}
.related-section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 8px;
}
.related-sub {
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-bottom: 32px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: block;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  border: 1px solid rgba(20, 40, 60, 0.06);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.related-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  display: block;
}
.related-card-body { padding: 20px 22px 22px; }
.related-cat {
  display: inline-block;
  font-size: 12px;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 10px;
}
.related-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.45;
  margin: 0 0 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.related-card:hover .related-title { color: var(--color-primary-dark); }
.related-date {
  font-size: 13px;
  color: var(--color-text-light);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* CTA */
.cta-band {
  background: linear-gradient(180deg, #EAF1F6, #DFEAF2);
  padding: 56px 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}
.cta-band h2 {
  font-size: 1.55rem;
  font-weight: 600;
  margin: 0 0 10px;
}
.cta-band p {
  color: var(--color-text-secondary);
  font-size: 15px;
  margin-bottom: 28px;
}

/* 页脚 */
.site-footer {
  background: #E8EEF4;
  padding: 60px 0 24px;
  border-top: 1px solid rgba(20, 40, 60, 0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 300px;
  margin: 0;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links h3, .footer-contact h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
}
.footer-links a {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}
.footer-links a:hover {
  color: var(--color-primary-dark);
  padding-left: 4px;
}
.footer-contact p {
  font-size: 14px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.footer-contact i.bi { color: var(--color-primary); }
.footer-bottom {
  border-top: 1px solid rgba(20, 40, 60, 0.08);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-light);
}

/* 响应式 */
@media (max-width: 991.98px) {
  .header-search { display: none; }
  .nav-toggler { display: inline-flex; }
  #siteNavbar.collapse:not(.show) { display: none; }
  #siteNavbar {
    width: 100%;
    border-top: none;
  }
  #siteNavbar.show { display: block; }
  .header-bottom { border-top: none; }
  .mobile-search { display: block; }
  .channel-nav { flex-direction: column; padding: 4px 0 14px; gap: 4px; }
  .channel-link { display: block; padding: 12px 16px; border-radius: 8px; border-bottom: none; }
  .channel-link.active { background: var(--color-primary-light); border-bottom: none; }
  .hot-tags { display: none; }
}
@media (min-width: 992px) {
  #siteNavbar.collapse {
    display: flex !important;
    height: auto !important;
    flex: 1;
  }
  #siteNavbar.collapsing {
    height: auto !important;
  }
  .header-bottom-inner {
    height: auto;
    min-height: 0;
  }
}
@media (max-width: 767.98px) {
  .article-main { padding: 40px 0 60px; }
  .article-container { max-width: 100%; }
  .article-meta { gap: 12px 18px; font-size: 13px; }
  .article-body { font-size: 16px; }
  .related-grid { grid-template-columns: 1fr; gap: 16px; }
  .article-pager { flex-direction: column; gap: 12px; }
  .pager-item { max-width: 100%; }
  .cta-band { padding: 40px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .site-footer { padding-top: 48px; }
}
@media (max-width: 575.98px) {
  .header-top { padding: 10px 0; }
  .site-logo { font-size: 18px; }
  .logo-mark { width: 32px; height: 32px; font-size: 13px; border-radius: 8px; }
  .article-head h1 { font-size: 1.6rem; margin-bottom: 18px; }
  .article-main { padding: 32px 0 48px; }
  .article-tags { gap: 8px; }
  .tag-pill { font-size: 12px; padding: 4px 10px; }
  .related-card img { height: 150px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-brand p { max-width: 100%; }
  .cta-band h2 { font-size: 1.3rem; }
  .empty-state { padding: 40px 20px; }
}