/* roulang page: index */
:root {
  --primary: #1e40af;
  --primary-dark: #172f7d;
  --primary-light: #3b82f6;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-soft: #64748b;
  --text-light: #94a3b8;
  --white: #ffffff;
  --border: #e2e8f0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow: 0 6px 28px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.12);
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
ul, ol {
  list-style: none;
}
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}
.section {
  padding: 96px 0;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(30, 64, 175, 0.08);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 100px;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
}
.section-title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
  letter-spacing: -0.5px;
}
.section-sub {
  font-size: 17px;
  color: var(--text-soft);
  margin-top: 14px;
  line-height: 1.8;
}
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-align: center;
  white-space: nowrap;
}
.btn i {
  font-size: 15px;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(30, 64, 175, 0.28);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(30, 64, 175, 0.36);
}
.btn-accent {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}
.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
}
.btn-outline {
  border-color: var(--primary);
  color: var(--primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}
.btn-light {
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}
.btn-light:hover {
  background: var(--white);
  transform: translateY(-2px);
}
.btn-ghost-light {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--white);
}
.btn-ghost-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--white);
}
.btn-block {
  width: 100%;
}
/* 导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.04);
}
.header-inner {
  display: grid;
  grid-template-columns: auto minmax(260px, 1fr) auto;
  align-items: center;
  gap: 28px;
  height: 80px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
  flex-shrink: 0;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.logo-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.2px;
}
.logo-sub {
  font-size: 11px;
  color: var(--text-soft);
  letter-spacing: 1px;
  text-transform: uppercase;
}
.nav-search {
  position: relative;
  max-width: 560px;
  width: 100%;
  justify-self: center;
}
.search-form {
  position: relative;
  display: flex;
  align-items: center;
}
.search-input {
  width: 100%;
  height: 48px;
  padding: 0 52px 0 46px;
  border-radius: 100px;
  background: var(--bg-alt);
  border: 2px solid transparent;
  color: var(--text);
  font-size: 15px;
  transition: var(--transition);
}
.search-input::placeholder {
  color: var(--text-light);
}
.search-input:focus {
  background: var(--white);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.1);
}
.search-icon {
  position: absolute;
  left: 17px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 15px;
  pointer-events: none;
}
.search-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  border: none;
}
.search-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-50%) scale(1.05);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-soft);
  transition: var(--transition);
  position: relative;
}
.nav-link i {
  font-size: 14px;
  opacity: 0.8;
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(30, 64, 175, 0.06);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(30, 64, 175, 0.08);
}
.nav-cta {
  margin-left: 8px;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--bg-alt);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.nav-toggle:hover {
  background: var(--border);
}
/* Hero */
.hero {
  position: relative;
  padding: 120px 0 100px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 64, 175, 0.78)), url("/assets/images/backpic/back-1.png") center/cover no-repeat;
  color: var(--white);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, rgba(248, 250, 252, 1));
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 60px;
}
.hero-copy {
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 100px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.6px;
  color: #e2e8f0;
  margin-bottom: 24px;
}
.hero-badge i {
  color: var(--accent);
}
.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero-title span {
  background: linear-gradient(90deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}
.hero-meta-item i {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--accent);
}
.hero-visual {
  position: relative;
  z-index: 2;
}
.hero-card {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(10px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
  padding: 12px;
}
.hero-card img {
  border-radius: 18px;
  width: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}
.hero-card-overlay {
  position: absolute;
  inset: 12px;
  border-radius: 18px;
  background: linear-gradient(180deg, transparent 45%, rgba(15, 23, 42, 0.88));
  display: flex;
  align-items: flex-end;
  padding: 26px;
  pointer-events: none;
}
.hero-card-overlay-text {
  color: #fff;
}
.hero-card-overlay-text h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}
.hero-card-overlay-text p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
}
/* 核心亮点 */
.features {
  background: var(--white);
  padding: 96px 0;
  position: relative;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(30, 64, 175, 0.2);
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(30, 64, 175, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 22px;
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(-4deg) scale(1.05);
}
.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.feature-card p {
  font-size: 14.5px;
  color: var(--text-soft);
  line-height: 1.75;
}
/* 分类入口 */
.category-entry {
  background: var(--bg);
  padding: 96px 0;
}
.category-wrap {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.category-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.category-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.category-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.category-card:hover .category-media img {
  transform: scale(1.05);
}
.category-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(15, 23, 42, 0.4));
}
.category-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 100px;
  box-shadow: var(--shadow-sm);
}
.category-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.category-body h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.category-body p {
  font-size: 15px;
  color: var(--text-soft);
  line-height: 1.75;
  margin-bottom: 22px;
  flex: 1;
}
.category-card .btn {
  align-self: flex-start;
}
/* 资讯列表 */
.news {
  background: var(--white);
  padding: 96px 0;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  display: block;
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(30, 64, 175, 0.25);
  background: var(--white);
}
.news-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.news-cat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(30, 64, 175, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 100px;
}
.news-date {
  font-size: 13px;
  color: var(--text-light);
  white-space: nowrap;
}
.news-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
  color: var(--text);
  transition: var(--transition);
}
.news-card:hover .news-title {
  color: var(--primary);
}
.news-desc {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
  color: var(--text-soft);
  font-size: 16px;
}
.news-more {
  text-align: center;
  margin-top: 40px;
}
/* 统计 */
.stats {
  background: var(--bg-dark);
  padding: 80px 0;
  position: relative;
  background-image: linear-gradient(135deg, rgba(30, 64, 175, 0.35), rgba(15, 23, 42, 0.9)), url("/assets/images/backpic/back-2.png");
  background-size: cover;
  background-position: center;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-card {
  text-align: center;
  padding: 36px 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(6px);
  transition: var(--transition);
}
.stat-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}
.stat-num {
  font-size: 48px;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}
.stat-num span {
  font-size: 30px;
  margin-left: 2px;
  color: var(--accent);
}
.stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.5px;
}
/* 使用流程 */
.process {
  background: var(--bg);
  padding: 96px 0;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}
.step-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 28px 30px;
  text-align: center;
  transition: var(--transition);
}
.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.step-num {
  counter-increment: step;
}
.step-num::before {
  content: "0" counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  box-shadow: 0 8px 20px rgba(30, 64, 175, 0.3);
  margin-bottom: 20px;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.step-card p {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.7;
}
.step-arrow {
  position: absolute;
  top: 50%;
  right: -22px;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  background: var(--white);
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-light);
  font-size: 12px;
  box-shadow: var(--shadow-sm);
  z-index: 2;
}
.step-card:last-child .step-arrow {
  display: none;
}
/* 平台优势 */
.advantages {
  background: var(--white);
  padding: 96px 0;
}
.adv-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
  margin-bottom: 80px;
}
.adv-row:last-child {
  margin-bottom: 0;
}
.adv-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.adv-media img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}
.adv-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
  pointer-events: none;
}
.adv-copy h2 {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
  color: var(--text);
}
.adv-copy p {
  font-size: 16px;
  color: var(--text-soft);
  line-height: 1.85;
  margin-bottom: 24px;
}
.adv-points {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.adv-point {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text);
}
.adv-point i {
  color: var(--primary);
  margin-top: 4px;
  font-size: 16px;
}
/* FAQ */
.faq {
  background: var(--bg);
  padding: 96px 0;
}
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.active {
  box-shadow: var(--shadow);
  border-color: rgba(30, 64, 175, 0.2);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: var(--transition);
}
.faq-q:hover {
  color: var(--primary);
}
.faq-q i {
  color: var(--text-light);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.active .faq-q i {
  transform: rotate(180deg);
  color: var(--primary);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-a-inner {
  padding: 0 28px 24px;
  font-size: 15px;
  color: var(--text-soft);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}
/* CTA */
.cta {
  padding: 100px 0;
  position: relative;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(30, 64, 175, 0.82)), url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  text-align: center;
  color: #fff;
}
.cta-inner {
  max-width: 700px;
  margin: 0 auto;
}
.cta h2 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 18px;
}
.cta p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  margin-bottom: 36px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}
.cta-note {
  margin-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}
/* 页脚 */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.footer-logo .logo-icon {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
}
.footer-logo .logo-name {
  color: #fff;
  font-size: 20px;
  font-weight: 800;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 360px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-col a i {
  font-size: 12px;
  opacity: 0.6;
}
.footer-col .contact-item {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.footer-col .contact-item i {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--accent);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}
.footer-bottom .footer-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}
.footer-bottom .footer-meta i {
  font-size: 11px;
}
/* 移动端导航 */
.mobile-menu {
  display: none;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 20px 32px 24px;
  flex-direction: column;
  gap: 16px;
}
.mobile-menu.open {
  display: flex;
}
.mobile-search {
  position: relative;
}
.mobile-search .search-input {
  width: 100%;
}
.mobile-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-links .nav-link {
  width: 100%;
  justify-content: flex-start;
  border-radius: var(--radius-md);
}
/* 响应式 */
@media (max-width: 1024px) {
  .header-inner {
    grid-template-columns: auto 1fr auto;
    gap: 18px;
    height: 72px;
  }
  .nav-search {
    max-width: 400px;
  }
  .nav-links, .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .hero {
    padding: 90px 0 80px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-visual {
    max-width: 560px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .step-arrow {
    display: none;
  }
  .adv-row {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }
  .section {
    padding: 72px 0;
  }
  .section-title {
    font-size: 30px;
  }
  .logo-name {
    font-size: 17px;
  }
  .logo-sub {
    display: none;
  }
  .header-inner {
    gap: 12px;
  }
  .nav-search {
    display: none;
  }
  .category-wrap {
    grid-template-columns: 1fr;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .hero-title {
    font-size: 38px;
  }
  .hero-desc {
    font-size: 16px;
  }
  .cta h2 {
    font-size: 32px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 20px;
  }
  .section {
    padding: 60px 0;
  }
  .header-inner {
    height: 64px;
    gap: 8px;
  }
  .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 17px;
    border-radius: 10px;
  }
  .logo-name {
    font-size: 15px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .stat-num {
    font-size: 36px;
  }
  .stat-label {
    font-size: 13px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-meta {
    flex-direction: column;
    gap: 16px;
  }
  .hero-actions {
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
  .cta h2 {
    font-size: 28px;
  }
  .faq-q {
    padding: 18px 20px;
    font-size: 15px;
  }
  .faq-a-inner {
    padding: 0 20px 20px;
  }
  .footer-bottom {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }
}

/* roulang page: article */
:root {
            --primary: #17456b;
            --primary-dark: #0e2f4b;
            --primary-light: #2a6a97;
            --accent: #d99a2b;
            --accent-hover: #b57f1e;
            --bg: #f4f6f9;
            --bg-deep: #eaeff5;
            --white: #ffffff;
            --text: #1e2b39;
            --text-light: #5f7082;
            --text-muted: #8a9aaa;
            --border: #e3e9f0;
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(23, 69, 107, 0.06);
            --shadow: 0 12px 32px rgba(23, 69, 107, 0.10);
            --shadow-lg: 0 24px 56px rgba(23, 69, 107, 0.16);
            --transition: all 0.28s ease;
            --container: 1180px;
            --space-section: 84px;
        }
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(217, 154, 43, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 16px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: var(--shadow-sm);
        }
        .logo-name {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
        }
        .nav-link i {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--bg-deep);
        }
        .nav-link.active {
            background: rgba(23, 69, 107, 0.08);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active i {
            color: var(--accent);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            padding: 10px 22px;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent) 0%, #f0b850 100%);
            color: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(217, 154, 43, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(217, 154, 43, 0.4);
        }
        .btn-ghost {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.65);
            color: #fff;
        }
        .btn-ghost:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-2px);
        }
        .nav-cta {
            margin-left: 10px;
            padding: 9px 20px;
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--bg-deep);
            color: var(--primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
        }
        /* Article Hero */
        .article-hero {
            background: linear-gradient(135deg, rgba(14, 47, 75, 0.94) 0%, rgba(23, 69, 107, 0.82) 45%, rgba(42, 106, 151, 0.62) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 68px 0 58px;
            color: #fff;
            position: relative;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .sep {
            opacity: 0.6;
        }
        .article-hero h1 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
            max-width: 860px;
        }
        .article-meta-line {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
        }
        .article-meta-line span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }
        .article-meta-line i {
            color: var(--accent);
        }
        /* Article Body */
        .article-section {
            padding: 56px 0 24px;
        }
        .article-layout {
            max-width: 860px;
        }
        .article-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .article-cover {
            position: relative;
            overflow: hidden;
            max-height: 420px;
        }
        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .article-cover:hover img {
            transform: scale(1.02);
        }
        .article-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(14, 47, 75, 0.12) 100%);
        }
        .article-content {
            padding: 40px 44px 32px;
            font-size: 16.5px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content p {
            margin-bottom: 1.4em;
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 1.6em 0 0.7em;
            padding-left: 14px;
            border-left: 4px solid var(--accent);
            color: var(--primary);
        }
        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            margin: 1.4em 0 0.6em;
            color: var(--primary);
        }
        .article-content ul {
            padding-left: 6px;
            margin-bottom: 1.4em;
        }
        .article-content ul li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 8px;
        }
        .article-content ul li::before {
            content: '';
            position: absolute;
            left: 4px;
            top: 0.68em;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
        }
        .article-content blockquote {
            margin: 1.6em 0;
            padding: 16px 22px;
            background: var(--bg);
            border-left: 4px solid var(--accent);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
        }
        .article-content a {
            color: var(--primary-light);
            border-bottom: 1px solid rgba(42, 106, 151, 0.35);
        }
        .article-content a:hover {
            color: var(--accent-hover);
            border-color: var(--accent);
        }
        .article-tags {
            padding: 0 44px 36px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            background: var(--bg);
            border: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-light);
        }
        .tag i {
            color: var(--accent);
            font-size: 12px;
        }
        /* Related */
        .related-section {
            padding: var(--space-section) 0;
        }
        .section-head {
            margin-bottom: 36px;
        }
        .section-kicker {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--accent-hover);
            margin-bottom: 8px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
        }
        .section-head p {
            color: var(--text-light);
            margin-top: 8px;
            max-width: 560px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 26px 26px 20px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
            border-color: rgba(217, 154, 43, 0.3);
        }
        .related-card-body .badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(23, 69, 107, 0.08);
            color: var(--primary);
            margin-bottom: 12px;
        }
        .related-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-foot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            padding-top: 16px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-muted);
        }
        .read-more {
            color: var(--primary-light);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .read-more i {
            transition: transform 0.25s ease;
            font-size: 12px;
        }
        .related-card:hover .read-more i {
            transform: translateX(4px);
        }
        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px;
            background: var(--white);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
            color: var(--text-light);
        }
        /* Features */
        .features-section {
            padding: var(--space-section) 0;
            background: var(--white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            padding: 34px 28px;
            border-radius: var(--radius);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            background: var(--white);
            border-color: rgba(217, 154, 43, 0.4);
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }
        .feature-icon {
            width: 58px;
            height: 58px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin: 0 auto 20px;
            box-shadow: var(--shadow-sm);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .feature-card p {
            font-size: 14.5px;
            color: var(--text-light);
            line-height: 1.75;
        }
        /* FAQ */
        .faq-section {
            padding: var(--space-section) 0;
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item summary {
            padding: 20px 28px;
            font-size: 16.5px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: var(--transition);
        }
        .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);
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            background: var(--accent);
            color: #fff;
        }
        .faq-item summary:hover {
            color: var(--primary);
        }
        .faq-item .faq-body {
            padding: 0 28px 22px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
        }
        /* CTA */
        .cta-section {
            padding: var(--space-section) 0;
            position: relative;
        }
        .cta-box {
            background: linear-gradient(135deg, rgba(14, 47, 75, 0.95) 0%, rgba(23, 69, 107, 0.88) 50%, rgba(42, 106, 151, 0.78) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(217, 154, 43, 0.18);
        }
        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-box p {
            font-size: 16px;
            opacity: 0.88;
            max-width: 560px;
            margin: 0 auto 30px;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        /* Not Found */
        .not-found-section {
            padding: 120px 0;
            text-align: center;
        }
        .not-found-box {
            max-width: 580px;
            margin: 0 auto;
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 56px 40px;
        }
        .not-found-box .nf-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--bg);
            color: var(--accent);
            font-size: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 22px;
        }
        .not-found-box h1 {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 28px;
        }
        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .footer-logo .logo-icon {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }
        .footer-logo .logo-name {
            color: #fff;
            font-size: 19px;
            font-weight: 800;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 340px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 26px;
            height: 3px;
            border-radius: 2px;
            background: var(--accent);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul a i {
            font-size: 11px;
            color: var(--accent);
        }
        .footer-col ul a:hover {
            color: #fff;
            padding-left: 3px;
        }
        .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 10px;
        }
        .contact-item i {
            color: var(--accent);
            width: 18px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 22px 0 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-meta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        /* Responsive */
        @media (max-width: 992px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-links {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: flex-start;
                padding: 18px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
                display: none;
                gap: 4px;
                z-index: 999;
            }
            .nav-links.nav-open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                border-radius: 10px;
                padding: 12px 16px;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
                justify-content: center;
            }
            .article-hero {
                padding: 44px 0 38px;
            }
            .article-content {
                padding: 28px 22px 22px;
            }
            .article-tags {
                padding: 0 22px 24px;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
        }
        @media (max-width: 640px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-hero h1 {
                font-size: 26px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .logo-name {
                font-size: 17px;
            }
            .article-content {
                font-size: 15.5px;
            }
            .container {
                padding: 0 18px;
            }
        }
        @media (max-width: 520px) {
            .article-meta-line {
                gap: 10px;
                font-size: 13px;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .faq-item summary {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-item .faq-body {
                padding: 0 18px 18px;
                font-size: 14px;
            }
        }

/* roulang page: category1 */
:root {
    --primary: #1668e3;
    --primary-dark: #0b3fb5;
    --accent: #ff7a1a;
    --success: #0ecb81;
    --ink: #111c2e;
    --ink-weak: #5b6b85;
    --bg: #f5f7fb;
    --bg-deep: #eef2f9;
    --card: #ffffff;
    --border: #e3e9f3;
    --shadow-sm: 0 2px 8px rgba(17, 28, 46, .05);
    --shadow-md: 0 10px 28px rgba(17, 28, 46, .08);
    --shadow-lg: 0 24px 60px rgba(17, 28, 46, .12);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-pill: 999px;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--ink);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

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

  a {
    color: inherit;
    text-decoration: none;
  }

  button,
  input {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
  }

  ul,
  ol {
    list-style: none;
  }

  .container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 700;
    border-radius: var(--radius-pill);
    padding: 11px 24px;
    transition: all .25s ease;
    cursor: pointer;
    line-height: 1.4;
    white-space: nowrap;
    border: 1px solid transparent;
  }

  .btn i {
    font-size: 14px;
  }

  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 18px rgba(22, 104, 227, .28);
  }

  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(22, 104, 227, .34);
  }

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

  .btn-light {
    background: #fff;
    color: var(--ink);
    box-shadow: 0 6px 18px rgba(0, 0, 0, .12);
  }

  .btn-light:hover {
    background: #f2f5fa;
    transform: translateY(-2px);
  }

  .btn-outline-light {
    background: rgba(255, 255, 255, .1);
    color: #fff;
    border-color: rgba(255, 255, 255, .55);
    backdrop-filter: blur(4px);
  }

  .btn-outline-light:hover {
    background: rgba(255, 255, 255, .2);
    border-color: #fff;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .95);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 12px rgba(17, 28, 46, .04);
  }

  .header-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    min-height: 78px;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 13px;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    color: #fff;
    display: grid;
    place-items: center;
    font-size: 18px;
    box-shadow: 0 6px 16px rgba(22, 104, 227, .3);
  }

  .logo-name {
    font-size: 20px;
    font-weight: 800;
    color: var(--ink);
    letter-spacing: .01em;
    white-space: nowrap;
  }

  .logo-name span {
    color: var(--primary);
  }

  .search-form {
    flex: 1;
    display: flex;
    align-items: center;
    max-width: 460px;
    margin: 0 auto;
    background: #f2f5fa;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    padding: 7px 7px 7px 18px;
    transition: box-shadow .25s ease, border-color .25s ease, background .25s ease;
  }

  .search-form > i {
    color: #8494ab;
    font-size: 14px;
    margin-right: 10px;
  }

  .search-form:focus-within {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(22, 104, 227, .12);
  }

  .search-form input {
    flex: 1;
    background: transparent;
    border: none;
    font-size: 14px;
    color: var(--ink);
    min-width: 0;
  }

  .search-form input::placeholder {
    color: #9aa8be;
  }

  .btn-search {
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-pill);
    padding: 9px 20px;
    font-size: 14px;
    font-weight: 700;
    transition: background .25s ease;
  }

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

  .nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
  }

  .nav-link {
    font-size: 15px;
    font-weight: 600;
    color: #2c3e50;
    padding: 9px 16px;
    border-radius: var(--radius-pill);
    transition: all .22s ease;
    display: inline-flex;
    align-items: center;
    gap: 7px;
  }

  .nav-link i {
    font-size: 13px;
    color: #9aa8be;
    transition: color .22s ease;
  }

  .nav-link:hover {
    background: #f0f4ff;
    color: var(--primary);
  }

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

  .nav-link.active {
    background: rgba(22, 104, 227, .1);
    color: var(--primary);
  }

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

  .nav-cta {
    padding: 9px 20px;
  }

  .menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: #f2f5fa;
    color: var(--ink);
    font-size: 18px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background .22s ease;
  }

  .menu-toggle:hover {
    background: #e8edf5;
  }

  .page-hero {
    position: relative;
    background-size: cover;
    background-position: center;
    min-height: 400px;
    display: flex;
    align-items: center;
  }

  .page-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(7, 19, 38, .92), rgba(15, 56, 122, .58));
  }

  .page-hero .container {
    position: relative;
    z-index: 2;
    padding: 72px 24px;
  }

  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #cbd5e1;
  }

  .breadcrumb a {
    color: #9db9ff;
    transition: color .2s ease;
  }

  .breadcrumb a:hover {
    color: #fff;
  }

  .breadcrumb i {
    font-size: 11px;
    color: #64748b;
  }

  .page-hero h1 {
    font-size: 42px;
    line-height: 1.25;
    color: #fff;
    font-weight: 800;
    margin: 16px 0 14px;
    letter-spacing: .01em;
  }

  .page-hero p {
    font-size: 17px;
    color: #dbe4f5;
    max-width: 660px;
    line-height: 1.7;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 28px;
  }

  .section {
    padding: 84px 0;
  }

  .section-alt {
    background: #fff;
  }

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

  .section-head {
    max-width: 760px;
    margin-bottom: 42px;
  }

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

  .section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 8px;
  }

  .section-eyebrow::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
  }

  .section-head h2 {
    font-size: 32px;
    line-height: 1.3;
    color: var(--ink);
    font-weight: 800;
    margin-top: 8px;
  }

  .section-head p {
    color: var(--ink-weak);
    font-size: 16px;
    margin-top: 12px;
    line-height: 1.7;
  }

  .overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 26px;
  }

  .overview-card {
    background: var(--card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: box-shadow .3s ease, transform .3s ease;
  }

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

  .overview-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
  }

  .overview-body {
    padding: 26px;
  }

  .overview-body h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 10px;
  }

  .overview-body > p {
    color: var(--ink-weak);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 16px;
  }

  .overview-body ul {
    display: grid;
    gap: 9px;
  }

  .overview-body li {
    position: relative;
    padding-left: 26px;
    font-size: 14px;
    color: var(--ink);
    font-weight: 500;
  }

  .overview-body li::before {
    content: "\f00c";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--success);
    position: absolute;
    left: 0;
    top: 1px;
    font-size: 13px;
  }

  .stats-bar {
    background: linear-gradient(135deg, var(--primary), #3b6fe0);
    padding: 36px 0;
    box-shadow: inset 0 6px 20px rgba(0, 0, 0, .08);
  }

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

  .stats-item strong {
    display: block;
    font-size: 34px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
  }

  .stats-item span {
    display: block;
    margin-top: 4px;
    font-size: 14px;
    color: rgba(255, 255, 255, .85);
    letter-spacing: .04em;
  }

  .topic-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
  }

  .topic-card {
    position: relative;
    background: var(--card);
    border-radius: var(--radius-md);
    padding: 30px 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
    overflow: hidden;
  }

  .topic-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity .3s ease;
  }

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

  .topic-card:hover::after {
    opacity: 1;
  }

  .topic-icon {
    width: 54px;
    height: 54px;
    border-radius: 15px;
    display: grid;
    place-items: center;
    background: rgba(22, 104, 227, .1);
    color: var(--primary);
    font-size: 20px;
    margin-bottom: 18px;
    transition: background .3s ease, color .3s ease;
  }

  .topic-card:hover .topic-icon {
    background: var(--primary);
    color: #fff;
  }

  .topic-card h3 {
    font-size: 17px;
    font-weight: 800;
    color: var(--ink);
  }

  .topic-card p {
    font-size: 14px;
    color: var(--ink-weak);
    margin-top: 10px;
    line-height: 1.65;
  }

  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
    counter-reset: step;
  }

  .step-item {
    position: relative;
    background: var(--card);
    border-radius: var(--radius-lg);
    padding: 36px 26px 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
  }

  .step-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
  }

  .step-num {
    font-size: 44px;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .step-item h3 {
    font-size: 17px;
    font-weight: 800;
    margin: 16px 0 10px;
    color: var(--ink);
  }

  .step-item p {
    font-size: 14px;
    color: var(--ink-weak);
    line-height: 1.7;
  }

  .article-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
  }

  .article-card {
    display: flex;
    gap: 18px;
    background: var(--card);
    border-radius: 16px;
    padding: 18px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
  }

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

  .article-thumb {
    width: 150px;
    height: 108px;
    border-radius: 12px;
    object-fit: cover;
    flex-shrink: 0;
  }

  .article-content {
    min-width: 0;
    display: flex;
    flex-direction: column;
  }

  .article-content h3 {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.5;
    color: var(--ink);
    transition: color .2s ease;
  }

  .article-card:hover .article-content h3 {
    color: var(--primary);
  }

  .article-content p {
    font-size: 13px;
    color: var(--ink-weak);
    line-height: 1.6;
    margin-top: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: auto;
    padding-top: 10px;
  }

  .article-meta .tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(22, 104, 227, .08);
    padding: 4px 12px;
    border-radius: var(--radius-pill);
  }

  .article-meta span {
    font-size: 12px;
    color: #94a0b8;
  }

  .faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: grid;
    gap: 14px;
  }

  .faq-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color .25s ease, box-shadow .25s ease;
  }

  .faq-item[open] {
    border-color: rgba(22, 104, 227, .35);
    box-shadow: var(--shadow-sm);
  }

  .faq-item summary {
    list-style: none;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 700;
    color: var(--ink);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
  }

  .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(--primary);
    background: rgba(22, 104, 227, .08);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    transition: transform .3s ease, background .3s ease;
  }

  .faq-item[open] summary::after {
    transform: rotate(180deg);
    background: var(--primary);
    color: #fff;
  }

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

  .faq-body {
    padding: 0 24px 22px;
    color: var(--ink-weak);
    font-size: 15px;
    line-height: 1.75;
  }

  .cta-section {
    padding: 40px 0 0;
  }

  .cta-box {
    position: relative;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    border-radius: 28px;
    overflow: hidden;
    padding: 62px 48px;
    text-align: center;
  }

  .cta-box::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(7, 19, 38, .92), rgba(22, 104, 227, .82));
  }

  .cta-box .cta-content {
    position: relative;
    z-index: 1;
  }

  .cta-box h2 {
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    line-height: 1.35;
  }

  .cta-box p {
    font-size: 16px;
    color: rgba(255, 255, 255, .86);
    margin: 14px auto 0;
    max-width: 560px;
    line-height: 1.7;
  }

  .cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-top: 28px;
  }

  .site-footer {
    background: #0d1526;
    color: #a6b4d0;
    padding: 66px 0 0;
    margin-top: 84px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr .8fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
  }

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

  .footer-logo .logo-icon {
    background: linear-gradient(135deg, var(--primary), #7c3aed);
  }

  .footer-logo .logo-name {
    color: #fff;
    font-size: 20px;
    font-weight: 800;
  }

  .footer-desc {
    margin-top: 16px;
    color: #8fa0c0;
    max-width: 340px;
    font-size: 14px;
    line-height: 1.75;
  }

  .footer-col h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 18px;
  }

  .footer-col ul {
    display: grid;
    gap: 10px;
  }

  .footer-col a {
    color: #a6b4d0;
    font-size: 14px;
    transition: color .22s ease, padding-left .22s ease;
  }

  .footer-col a i {
    font-size: 10px;
    margin-right: 6px;
    color: #52607a;
    transition: color .22s ease;
  }

  .footer-col a:hover {
    color: #fff;
    padding-left: 4px;
  }

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

  .contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #a6b4d0;
    margin-bottom: 12px;
  }

  .contact-item i {
    color: #64748b;
    width: 16px;
    text-align: center;
  }

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    border-top: 1px solid #24304a;
    padding: 22px 0;
  }

  .footer-bottom p {
    font-size: 13px;
    color: #8fa0c0;
    margin: 0;
  }

  .footer-meta {
    font-size: 13px;
    color: #64748b;
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .footer-meta i {
    color: var(--primary);
  }

  @media (max-width: 1100px) {
    .topic-grid {
      grid-template-columns: repeat(2, 1fr);
    }

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

    .search-form {
      max-width: 320px;
    }

    .nav-link {
      padding: 9px 12px;
      font-size: 14px;
    }
  }

  @media (max-width: 900px) {
    .header-inner {
      flex-wrap: wrap;
      min-height: 0;
      padding: 14px 0;
      gap: 12px;
    }

    .menu-toggle {
      display: inline-flex;
      margin-left: auto;
    }

    .search-form {
      order: 3;
      max-width: 100%;
      flex-basis: 100%;
      margin: 0;
    }

    .nav-links {
      display: none;
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      flex-direction: column;
      align-items: stretch;
      background: #fff;
      padding: 16px 24px;
      border-bottom: 1px solid var(--border);
      box-shadow: 0 16px 32px rgba(17, 28, 46, .1);
      gap: 6px;
    }

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

    .nav-link {
      padding: 12px 16px;
      border-radius: 12px;
    }

    .nav-cta {
      margin-top: 8px;
      justify-content: center;
    }

    .overview-grid,
    .article-list {
      grid-template-columns: 1fr;
    }

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

  @media (max-width: 640px) {
    .container {
      padding: 0 18px;
    }

    .page-hero {
      min-height: 340px;
    }

    .page-hero .container {
      padding: 48px 18px;
    }

    .page-hero h1 {
      font-size: 30px;
    }

    .page-hero p {
      font-size: 15px;
    }

    .section {
      padding: 60px 0;
    }

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

    .topic-grid,
    .steps-grid,
    .stats-grid {
      grid-template-columns: 1fr 1fr;
    }

    .stats-item strong {
      font-size: 26px;
    }

    .article-card {
      flex-direction: column;
    }

    .article-thumb {
      width: 100%;
      height: 160px;
    }

    .cta-box {
      padding: 40px 24px;
      border-radius: 20px;
    }

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

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

  @media (max-width: 480px) {
    .logo-name {
      font-size: 17px;
    }

    .logo-icon {
      width: 38px;
      height: 38px;
      font-size: 16px;
    }

    .topic-grid,
    .steps-grid,
    .stats-grid {
      grid-template-columns: 1fr;
    }

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