/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --c-primary: #0f1d33;
  --c-primary-light: #1a2d4a;
  --c-accent: #e8a817;
  --c-accent-hover: #d4990e;
  --c-accent-light: #fef3d6;
  --c-bg: #f8f9fc;
  --c-bg-card: #ffffff;
  --c-bg-dark: #0a1426;
  --c-text: #1a2332;
  --c-text-secondary: #5a6a7e;
  --c-text-light: #8a9ab0;
  --c-border: #e2e6ed;
  --c-border-light: #f0f2f6;
  --c-success: #22c55e;
  --c-warning: #f59e0b;
  --c-danger: #ef4444;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(15, 29, 51, 0.06);
  --shadow-md: 0 6px 24px rgba(15, 29, 51, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 29, 51, 0.12);
  --shadow-accent: 0 4px 20px rgba(232, 168, 23, 0.3);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --container-max: 1240px;
  --header-h: 76px;
}
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
a:focus-visible { outline: 3px solid var(--c-accent); outline-offset: 2px; border-radius: 4px; }
button { cursor: pointer; font-family: inherit; border: none; background: none; transition: var(--transition); }
button:focus-visible { outline: 3px solid var(--c-accent); outline-offset: 2px; border-radius: 4px; }
input, textarea { font-family: inherit; font-size: 1rem; transition: var(--transition); }
input:focus, textarea:focus { outline: none; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ===== 通用标题 ===== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-accent);
  background: var(--c-accent-light);
  padding: 6px 18px;
  border-radius: 100px;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--c-primary);
  margin-bottom: 12px;
}
.section-sub {
  font-size: 1.1rem;
  color: var(--c-text-secondary);
  max-width: 640px;
  line-height: 1.6;
}
.section-header {
  text-align: center;
  margin-bottom: 52px;
}
.section-header .section-sub { margin: 0 auto; }
@media (max-width: 768px) {
  .section-title { font-size: 1.7rem; }
  .section-sub { font-size: 1rem; }
  .section-header { margin-bottom: 36px; }
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--c-accent);
  color: var(--c-primary);
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover {
  background: var(--c-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(232, 168, 23, 0.4);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  border: 2px solid var(--c-border);
  color: var(--c-text);
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: var(--c-accent-light);
}
.btn-ghost {
  color: var(--c-text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
}
.btn-ghost:hover { background: rgba(15,29,51,0.05); color: var(--c-primary); }
.btn-sm { padding: 10px 22px; font-size: 0.9rem; }
.btn-lg { padding: 18px 40px; font-size: 1.1rem; }
@media (max-width: 520px) {
  .btn { padding: 12px 24px; font-size: 0.95rem; }
  .btn-lg { padding: 14px 28px; font-size: 1rem; }
}

/* ===== Header / Nav ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--c-border-light);
  z-index: 1000;
  transition: var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  gap: 20px;
}
.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.header-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--c-accent), #d4990e);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
  font-size: 1.2rem;
  font-weight: 900;
}
.header-logo .logo-text {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--c-primary);
  letter-spacing: -0.3px;
}
.header-logo .logo-text span { color: var(--c-accent); }

/* 搜索框 */
.header-search {
  flex: 1;
  max-width: 480px;
  position: relative;
}
.header-search input {
  width: 100%;
  padding: 10px 20px 10px 48px;
  border: 2px solid var(--c-border);
  border-radius: 100px;
  background: var(--c-bg);
  font-size: 0.95rem;
  color: var(--c-text);
  transition: var(--transition);
}
.header-search input::placeholder { color: var(--c-text-light); }
.header-search input:focus {
  border-color: var(--c-accent);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(232,168,23,0.12);
}
.header-search .search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--c-text-light);
  font-size: 1rem;
  pointer-events: none;
}

/* 导航链接 */
.header-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.header-nav a {
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-text-secondary);
  transition: var(--transition);
}
.header-nav a:hover { background: rgba(15,29,51,0.05); color: var(--c-primary); }
.header-nav a.active {
  background: var(--c-primary);
  color: #fff;
  font-weight: 600;
}
.header-nav a.active:hover { background: var(--c-primary-light); }

/* 移动端汉堡 */
.header-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--c-text);
  font-size: 1.4rem;
  background: transparent;
  border: 1px solid var(--c-border);
  flex-shrink: 0;
}
.header-toggle:hover { background: var(--c-bg); }

/* 移动端菜单面板 */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: #fff;
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--shadow-md);
  padding: 16px 24px 24px;
  z-index: 999;
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--c-text-secondary);
  border-bottom: 1px solid var(--c-border-light);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { background: var(--c-bg); color: var(--c-primary); }
.mobile-menu a.active { color: var(--c-accent); font-weight: 700; }

@media (max-width: 920px) {
  .header-search { max-width: 320px; }
}
@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .header-search { display: none; }
  .header-nav { display: none; }
  .header-toggle { display: flex; }
  .header-inner { padding: 0 16px; gap: 12px; }
  .header-logo .logo-text { font-size: 1rem; }
  .header-logo .logo-icon { width: 34px; height: 34px; font-size: 1rem; }
  /* 移动端搜索放在菜单内 */
  .mobile-menu .mobile-search {
    display: block;
    margin-bottom: 16px;
    position: relative;
  }
  .mobile-menu .mobile-search input {
    width: 100%;
    padding: 12px 20px 12px 48px;
    border: 2px solid var(--c-border);
    border-radius: 100px;
    background: var(--c-bg);
    font-size: 1rem;
  }
  .mobile-menu .mobile-search .search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--c-text-light);
  }
}

/* ===== Hero ===== */
.hero {
  padding: calc(var(--header-h) + 40px) 0 80px;
  background: var(--c-primary);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  position: relative;
  overflow: hidden;
  min-height: 70vh;
  display: flex;
  align-items: center;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,29,51,0.88) 0%, rgba(15,29,51,0.72) 100%);
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--c-bg);
  clip-path: ellipse(70% 100% at 50% 100%);
  z-index: 2;
}
.hero .container { position: relative; z-index: 3; }
.hero-content { max-width: 720px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232,168,23,0.18);
  color: var(--c-accent);
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(232,168,23,0.2);
}
.hero-badge i { font-size: 0.85rem; }
.hero h1 {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero h1 span { color: var(--c-accent); }
.hero p {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 560px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-actions .btn-primary { background: #fff; color: var(--c-primary); box-shadow: 0 4px 24px rgba(0,0,0,0.2); }
.hero-actions .btn-primary:hover { background: var(--c-accent); color: var(--c-primary); box-shadow: var(--shadow-accent); }
.hero-actions .btn-outline { border-color: rgba(255,255,255,0.3); color: #fff; }
.hero-actions .btn-outline:hover { border-color: var(--c-accent); background: rgba(232,168,23,0.15); color: var(--c-accent); }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.hero-stat { text-align: left; }
.hero-stat .num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--c-accent);
  line-height: 1.2;
}
.hero-stat .label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.8rem; }
}
@media (max-width: 768px) {
  .hero { padding: calc(var(--header-h) + 24px) 0 60px; min-height: auto; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1.05rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat .num { font-size: 1.6rem; }
  .hero::after { height: 40px; clip-path: ellipse(100% 100% at 50% 100%); }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-stats { flex-direction: column; gap: 16px; }
}

/* ===== 板块通用 ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--c-bg-card); }
.section-dark {
  background: var(--c-bg-dark);
  color: #fff;
}
.section-dark .section-title { color: #fff; }
.section-dark .section-sub { color: rgba(255,255,255,0.7); }
.section-dark .section-label { background: rgba(232,168,23,0.15); color: var(--c-accent); }
@media (max-width: 768px) { .section { padding: 52px 0; } }

/* ===== 特点卡片 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--c-bg-card);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  border: 1px solid var(--c-border-light);
  transition: var(--transition);
  text-align: center;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.feature-card .icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  background: var(--c-accent-light);
  color: var(--c-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto 20px;
  transition: var(--transition);
}
.feature-card:hover .icon { background: var(--c-accent); color: #fff; }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--c-primary); }
.feature-card p { font-size: 0.95rem; color: var(--c-text-secondary); line-height: 1.6; }
@media (max-width: 1024px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .features-grid { grid-template-columns: 1fr; } }

/* ===== 分类入口 ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border-light);
  transition: var(--transition);
  display: block;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.category-card .cat-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition);
}
.category-card:hover .cat-img { transform: scale(1.04); }
.category-card .cat-body {
  padding: 22px 24px 26px;
}
.category-card .cat-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--c-accent-light);
  color: var(--c-accent);
  margin-bottom: 12px;
}
.category-card h3 { font-size: 1.2rem; font-weight: 700; color: var(--c-primary); margin-bottom: 8px; }
.category-card p { font-size: 0.92rem; color: var(--c-text-secondary); line-height: 1.6; }
.category-card .cat-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-accent);
  margin-top: 14px;
  transition: var(--transition);
}
.category-card:hover .cat-arrow { gap: 12px; }
@media (max-width: 1024px) { .category-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .category-grid { grid-template-columns: 1fr; } }

/* ===== 资讯列表 ===== */
.news-list { display: flex; flex-direction: column; gap: 18px; }
.news-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--c-bg-card);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border: 1px solid var(--c-border-light);
  transition: var(--transition);
}
.news-item:hover {
  border-color: transparent;
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}
.news-item .news-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--c-accent-light);
  color: var(--c-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.news-item .news-body { flex: 1; min-width: 0; }
.news-item .news-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 6px;
  line-height: 1.4;
}
.news-item .news-body h4 a:hover { color: var(--c-accent); }
.news-item .news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--c-text-light);
}
.news-item .news-meta .cat { color: var(--c-accent); font-weight: 600; }
.news-item .news-desc {
  font-size: 0.92rem;
  color: var(--c-text-secondary);
  margin-top: 6px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--c-text-light);
  font-size: 1.05rem;
  background: var(--c-bg-card);
  border-radius: var(--radius-md);
  border: 1px dashed var(--c-border);
}
@media (max-width: 768px) {
  .news-item { flex-direction: column; padding: 16px 18px; gap: 12px; }
  .news-item .news-num { display: none; }
}

/* ===== 数据统计 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.stat-card {
  text-align: center;
  padding: 36px 20px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
}
.stat-card:hover { background: rgba(255,255,255,0.1); transform: translateY(-4px); }
.stat-card .stat-num {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--c-accent);
  line-height: 1.2;
}
.stat-card .stat-label {
  font-size: 1rem;
  color: rgba(255,255,255,0.7);
  margin-top: 8px;
}
.stat-card .stat-icon {
  font-size: 2rem;
  color: rgba(232,168,23,0.3);
  margin-bottom: 12px;
}
@media (max-width: 1024px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

/* ===== 流程 ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  position: relative;
}
.steps-grid::before {
  content: '';
  position: absolute;
  top: 44px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(to right, var(--c-accent), var(--c-border));
  z-index: 0;
}
.step-card {
  text-align: center;
  position: relative;
  z-index: 1;
  background: var(--c-bg-card);
  border-radius: var(--radius-md);
  padding: 32px 20px 28px;
  border: 1px solid var(--c-border-light);
  transition: var(--transition);
}
.step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.step-card .step-num {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--c-accent);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0 auto 18px;
  box-shadow: 0 4px 16px rgba(232,168,23,0.3);
}
.step-card h4 { font-size: 1.1rem; font-weight: 700; color: var(--c-primary); margin-bottom: 8px; }
.step-card p { font-size: 0.9rem; color: var(--c-text-secondary); line-height: 1.6; }
@media (max-width: 1024px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
}
@media (max-width: 520px) { .steps-grid { grid-template-columns: 1fr; } }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--c-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border-light);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--c-border); }
.faq-item .faq-q {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--c-primary);
  transition: var(--transition);
  user-select: none;
}
.faq-item .faq-q:hover { color: var(--c-accent); }
.faq-item .faq-q i {
  font-size: 0.9rem;
  color: var(--c-text-light);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-q i { transform: rotate(180deg); color: var(--c-accent); }
.faq-item .faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--c-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.open .faq-a {
  max-height: 300px;
  padding: 0 24px 20px;
}
@media (max-width: 520px) {
  .faq-item .faq-q { padding: 16px 18px; font-size: 0.98rem; }
  .faq-item .faq-a { padding: 0 18px; font-size: 0.9rem; }
  .faq-item.open .faq-a { padding: 0 18px 16px; }
}

/* ===== CTA ===== */
.cta-section {
  background: var(--c-primary);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  position: relative;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,29,51,0.92), rgba(15,29,51,0.78));
}
.cta-section .container { position: relative; z-index: 1; text-align: center; }
.cta-section h2 {
  font-size: 2.4rem;
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  margin: 0 auto 32px;
}
.cta-section .btn-primary { background: #fff; color: var(--c-primary); box-shadow: 0 4px 24px rgba(0,0,0,0.2); }
.cta-section .btn-primary:hover { background: var(--c-accent); color: var(--c-primary); box-shadow: var(--shadow-accent); }
@media (max-width: 768px) {
  .cta-section h2 { font-size: 1.8rem; }
  .cta-section p { font-size: 1rem; }
}

/* ===== Footer ===== */
.footer {
  background: var(--c-primary);
  color: rgba(255,255,255,0.7);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .footer-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: var(--c-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
  font-weight: 900;
  font-size: 1.1rem;
}
.footer-brand .footer-logo .logo-text {
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
}
.footer-brand .footer-logo .logo-text span { color: var(--c-accent); }
.footer-brand p { font-size: 0.92rem; line-height: 1.7; max-width: 320px; }
.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}
.footer-col a {
  display: block;
  padding: 6px 0;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-col a:hover { color: var(--c-accent); padding-left: 4px; }
.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--c-accent); }
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 768px) {
  .footer { padding: 40px 0 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== 其他通用 ===== */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.gap-12 { gap: 12px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #1340a0;
            --primary-light: #e8f0fe;
            --primary-gradient: linear-gradient(135deg, #1a56db 0%, #0f3a8a 100%);
            --secondary: #f59e0b;
            --secondary-light: #fef3c7;
            --accent: #06b6d4;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --bg-section-alt: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.16);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: transparent;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

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

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

        .section-title {
            font-size: 2.2rem;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }

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

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--primary-light);
            color: var(--primary);
            border: 1px solid rgba(26, 86, 219, 0.15);
        }

        .badge-warning {
            background: var(--secondary-light);
            color: #b45309;
            border-color: rgba(245, 158, 11, 0.2);
        }

        .badge-success {
            background: #d1fae5;
            color: #065f46;
            border-color: rgba(16, 185, 129, 0.2);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
            cursor: pointer;
            text-decoration: none;
            line-height: 1.4;
        }
        .btn i {
            font-size: 0.9rem;
        }

        .btn-primary {
            background: var(--primary-gradient);
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(26, 86, 219, 0.45);
            color: var(--text-white);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.3);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.2);
        }

        .btn-white {
            background: var(--bg-white);
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
            color: var(--primary-dark);
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            height: var(--header-height);
            transition: var(--transition);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .header-logo:hover {
            opacity: 0.9;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary-gradient);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: -0.5px;
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }
        .logo-text span {
            color: var(--primary);
        }

        .header-search {
            flex: 1;
            max-width: 420px;
            position: relative;
            display: none;
        }
        .header-search .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.9rem;
            pointer-events: none;
        }
        .header-search input {
            width: 100%;
            padding: 10px 16px 10px 44px;
            background: var(--bg-section-alt);
            border-radius: 50px;
            font-size: 0.9rem;
            color: var(--text-primary);
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .header-search input:focus {
            background: var(--bg-white);
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.1);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition);
            white-space: nowrap;
        }
        .header-nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .header-nav a.active {
            background: var(--primary-gradient);
            color: var(--text-white);
            box-shadow: 0 2px 10px rgba(26, 86, 219, 0.3);
        }

        .header-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: var(--bg-section-alt);
            color: var(--text-primary);
            font-size: 1.2rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            margin-left: auto;
        }
        .header-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Banner / Page Hero ===== */
        .page-banner {
            padding-top: calc(var(--header-height) + 20px);
            min-height: 320px;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--primary-gradient);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--bg-body);
            border-radius: 50% 50% 0 0 / 100% 100% 0 0;
            transform: scaleY(0.4);
            transform-origin: bottom;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 24px 80px;
        }
        .page-banner .badge {
            background: rgba(255, 255, 255, 0.2);
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.25);
            margin-bottom: 16px;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ===== Guide Steps ===== */
        .guide-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            margin-top: -40px;
            position: relative;
            z-index: 3;
        }
        .guide-step-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow-lg);
            text-align: center;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .guide-step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
        }
        .guide-step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: white;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(26, 86, 219, 0.3);
        }
        .guide-step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .guide-step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Security Measures ===== */
        .measures-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .measure-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .measure-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .measure-card .measure-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: white;
        }
        .measure-card .measure-icon.blue {
            background: var(--primary-gradient);
        }
        .measure-card .measure-icon.amber {
            background: linear-gradient(135deg, #f59e0b, #d97706);
        }
        .measure-card .measure-icon.teal {
            background: linear-gradient(135deg, #06b6d4, #0891b2);
        }
        .measure-card .measure-icon.green {
            background: linear-gradient(135deg, #10b981, #059669);
        }
        .measure-card .measure-icon.purple {
            background: linear-gradient(135deg, #8b5cf6, #6d28d9);
        }
        .measure-card .measure-icon.red {
            background: linear-gradient(135deg, #ef4444, #dc2626);
        }
        .measure-card h3 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .measure-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Comparison / Tips ===== */
        .comparison-section {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .comparison-section .section-title {
            color: var(--text-white);
        }
        .comparison-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: start;
        }
        .comparison-col {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
        }
        .comparison-col h3 {
            color: var(--text-white);
            font-size: 1.3rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .comparison-col h3 i {
            font-size: 1.2rem;
        }
        .comparison-col .check {
            color: #10b981;
        }
        .comparison-col .cross {
            color: #ef4444;
        }
        .comparison-col ul li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.85);
        }
        .comparison-col ul li:last-child {
            border-bottom: none;
        }
        .comparison-col ul li i {
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ===== Password Tips ===== */
        .password-tips {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }
        .password-tip {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }
        .password-tip:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .password-tip h4 {
            font-size: 1rem;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .password-tip h4 i {
            color: var(--primary);
        }
        .password-tip p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .password-tip.tip-warning {
            border-left-color: var(--secondary);
        }
        .password-tip.tip-warning h4 i {
            color: var(--secondary);
        }
        .password-tip.tip-success {
            border-left-color: #10b981;
        }
        .password-tip.tip-success h4 i {
            color: #10b981;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: transparent;
            border: none;
            cursor: pointer;
            text-align: left;
            gap: 16px;
            transition: var(--transition);
        }
        .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 0.9rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-gradient);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2.2rem;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.1rem;
            max-width: 540px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-white i {
            color: var(--primary);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand .footer-logo .logo-icon {
            width: 34px;
            height: 34px;
            font-size: 1.1rem;
            background: var(--primary-gradient);
        }
        .footer-brand .footer-logo .logo-text {
            color: var(--text-white);
            font-size: 1.15rem;
        }
        .footer-brand .footer-logo .logo-text span {
            color: #60a5fa;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
            text-decoration: none;
        }
        .footer-col a:hover {
            color: #60a5fa;
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: #60a5fa;
        }

        /* ===== Responsive ===== */
        @media (min-width: 1025px) {
            .header-search {
                display: block;
            }
        }

        @media (max-width: 1024px) {
            .header-search {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
            }
            .header-nav.open {
                display: flex;
            }
            .header-nav a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
            }
            .header-toggle {
                display: flex;
            }
            .header-toggle.open i::before {
                content: '\f00d';
            }

            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }

            .section-title {
                font-size: 1.7rem;
            }
            .section-padding {
                padding: 48px 0;
            }

            .guide-steps {
                grid-template-columns: 1fr 1fr;
                margin-top: -24px;
            }
            .measures-grid {
                grid-template-columns: 1fr;
            }
            .password-tips {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section .container {
                padding: 48px 24px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .guide-steps {
                grid-template-columns: 1fr;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .header-inner {
                padding: 0 16px;
                gap: 12px;
            }
            .logo-text {
                font-size: 1.05rem;
            }
            .logo-text span {
                font-size: 1.05rem;
            }
            .container {
                padding: 0 16px;
            }
            .comparison-col {
                padding: 24px 18px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.9rem;
            }
            .measure-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 20px 18px;
            }
            .btn {
                padding: 10px 22px;
                font-size: 0.9rem;
            }
        }

        /* ===== Focus & Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Smooth Image Loading ===== */
        img {
            transition: opacity 0.3s ease;
        }
        img[data-src] {
            opacity: 0;
        }
        img.loaded {
            opacity: 1;
        }

/* roulang page: article */
:root {
  --primary: #1e3a5f;
  --primary-dark: #152a45;
  --primary-light: #2a5a8a;
  --secondary: #d4a843;
  --secondary-light: #e8c56d;
  --accent: #e67e22;
  --accent-light: #f39c5e;
  --bg: #f5f7fa;
  --bg-alt: #eef1f6;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #5a6a7e;
  --text-light: #8a9aae;
  --border: #e2e6ed;
  --border-light: #f0f2f5;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --container: 1200px;
  --header-h: 72px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--primary-light);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--secondary)}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-sm)}
input,button,textarea{font-family:inherit;font-size:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}

/* header */
.header{background:var(--bg-card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:1000;box-shadow:var(--shadow-sm)}
.header-inner{max-width:var(--container);margin:0 auto;padding:0 24px;height:var(--header-h);display:flex;align-items:center;gap:24px}
.header-logo{display:flex;align-items:center;gap:10px;flex-shrink:0;text-decoration:none}
.logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;letter-spacing:-0.5px;box-shadow:0 2px 8px rgba(30,58,95,0.25)}
.logo-text{font-size:20px;font-weight:700;color:var(--primary);letter-spacing:-0.3px;line-height:1.2}
.logo-text span{color:var(--secondary);font-weight:600}
.header-search{flex:1;max-width:420px;position:relative}
.header-search .search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-light);font-size:14px;pointer-events:none}
.header-search input{width:100%;height:42px;padding:0 16px 0 42px;border:1px solid var(--border);border-radius:24px;background:var(--bg);color:var(--text);font-size:14px;outline:none;transition:var(--transition)}
.header-search input:focus{border-color:var(--primary-light);box-shadow:0 0 0 3px rgba(42,90,138,0.12);background:var(--bg-card)}
.header-search input::placeholder{color:var(--text-light)}
.header-nav{display:flex;align-items:center;gap:4px;flex-shrink:0}
.header-nav a{display:inline-flex;align-items:center;padding:8px 18px;border-radius:24px;color:var(--text-secondary);font-size:14px;font-weight:500;text-decoration:none;transition:var(--transition)}
.header-nav a:hover{color:var(--primary);background:var(--bg)}
.header-nav a.active{color:var(--bg-card);background:var(--primary);box-shadow:0 2px 8px rgba(30,58,95,0.2)}
.header-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:none;background:transparent;color:var(--text);font-size:20px;border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition)}
.header-toggle:hover{background:var(--bg)}
@media(max-width:1024px){.header-search{max-width:280px}}
@media(max-width:820px){
  .header-nav{gap:2px}
  .header-nav a{padding:6px 14px;font-size:13px}
  .header-search{max-width:200px}
}
@media(max-width:680px){
  .header-inner{gap:12px;padding:0 12px}
  .header-search{display:none}
  .header-nav{position:fixed;top:var(--header-h);left:0;right:0;background:var(--bg-card);border-bottom:1px solid var(--border);flex-direction:column;padding:12px 16px;gap:2px;transform:translateY(-120%);opacity:0;pointer-events:none;transition:var(--transition);box-shadow:var(--shadow-lg);z-index:999}
  .header-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .header-nav a{width:100%;padding:12px 16px;border-radius:var(--radius-sm);font-size:15px}
  .header-toggle{display:flex}
}
@media(max-width:480px){
  .logo-text{font-size:17px}
  .logo-icon{width:34px;height:34px;font-size:16px}
}

/* breadcrumb */
.breadcrumb{background:var(--bg);padding:16px 0;border-bottom:1px solid var(--border-light)}
.breadcrumb-inner{max-width:var(--container);margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-light);flex-wrap:wrap}
.breadcrumb-inner a{color:var(--text-secondary);text-decoration:none}
.breadcrumb-inner a:hover{color:var(--primary)}
.breadcrumb-inner span{color:var(--text-light)}
.breadcrumb-inner .sep{color:var(--border);font-size:10px}
@media(max-width:768px){.breadcrumb-inner{padding:0 16px;font-size:12px}}

/* article main */
.article-wrap{padding:40px 0 60px}
.article-grid{max-width:var(--container);margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1fr 320px;gap:40px}
.article-main{min-width:0}
.article-sidebar{min-width:0}
@media(max-width:1024px){.article-grid{grid-template-columns:1fr 260px;gap:32px}}
@media(max-width:820px){.article-grid{grid-template-columns:1fr}}
@media(max-width:768px){.article-wrap{padding:24px 0 40px}.article-grid{padding:0 16px}}

/* article header */
.article-header{margin-bottom:32px;padding-bottom:28px;border-bottom:1px solid var(--border-light)}
.article-category{display:inline-flex;align-items:center;gap:6px;background:rgba(212,168,67,0.12);color:var(--secondary);font-size:12px;font-weight:600;padding:4px 14px;border-radius:20px;margin-bottom:16px;letter-spacing:0.3px;text-transform:uppercase}
.article-category i{font-size:10px}
.article-title{font-size:32px;font-weight:700;line-height:1.3;color:var(--primary);margin-bottom:16px;letter-spacing:-0.5px}
.article-meta{display:flex;flex-wrap:wrap;gap:12px 24px;font-size:13px;color:var(--text-light)}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta i{font-size:12px;color:var(--text-light)}
.article-meta .author{color:var(--text-secondary);font-weight:500}
@media(max-width:768px){
  .article-title{font-size:24px;letter-spacing:-0.3px}
  .article-meta{gap:8px 16px;font-size:12px}
}

/* article cover */
.article-cover{width:100%;border-radius:var(--radius);overflow:hidden;margin-bottom:32px;box-shadow:var(--shadow-sm);background:var(--bg-alt)}
.article-cover img{width:100%;height:auto;max-height:480px;object-fit:cover}

/* article content */
.article-content{font-size:16px;line-height:1.85;color:var(--text);margin-bottom:36px}
.article-content p{margin-bottom:20px}
.article-content h2{font-size:24px;font-weight:700;color:var(--primary);margin-top:40px;margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--secondary-light)}
.article-content h3{font-size:20px;font-weight:600;color:var(--primary-dark);margin-top:32px;margin-bottom:12px}
.article-content h4{font-size:17px;font-weight:600;color:var(--text);margin-top:24px;margin-bottom:8px}
.article-content ul,.article-content ol{padding-left:24px;margin-bottom:20px}
.article-content li{margin-bottom:6px}
.article-content a{color:var(--primary-light);text-decoration:underline;text-underline-offset:2px}
.article-content a:hover{color:var(--secondary)}
.article-content blockquote{border-left:4px solid var(--secondary);background:var(--bg);padding:16px 20px;margin:24px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary);font-style:italic}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{border-radius:var(--radius-sm);margin:24px auto;box-shadow:var(--shadow-sm);max-height:500px;width:auto}
.article-content pre{background:var(--primary-dark);color:#e8e8e8;padding:20px 24px;border-radius:var(--radius-sm);overflow-x:auto;font-size:14px;line-height:1.6;margin:24px 0}
.article-content code{background:var(--bg-alt);padding:2px 8px;border-radius:4px;font-size:14px;color:var(--accent)}
.article-content pre code{background:transparent;padding:0;color:inherit}
@media(max-width:768px){
  .article-content{font-size:15px;line-height:1.8}
  .article-content h2{font-size:20px}
  .article-content h3{font-size:18px}
}

/* article tags */
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:32px;padding-top:8px}
.article-tags .tag{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;background:var(--bg);border:1px solid var(--border);border-radius:20px;font-size:13px;color:var(--text-secondary);text-decoration:none;transition:var(--transition)}
.article-tags .tag:hover{background:var(--primary);color:var(--bg-card);border-color:var(--primary);box-shadow:0 2px 8px rgba(30,58,95,0.15)}

/* article nav */
.article-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:40px;padding-top:24px;border-top:1px solid var(--border-light)}
.article-nav a{display:flex;flex-direction:column;padding:16px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);text-decoration:none;transition:var(--transition);min-height:80px}
.article-nav a:hover{border-color:var(--primary-light);box-shadow:var(--shadow-sm);transform:translateY(-2px)}
.article-nav .nav-label{font-size:12px;color:var(--text-light);margin-bottom:4px;display:flex;align-items:center;gap:6px}
.article-nav .nav-title{font-size:14px;font-weight:600;color:var(--text);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-nav .next{text-align:right}
.article-nav .next .nav-label{justify-content:flex-end}
@media(max-width:600px){.article-nav{grid-template-columns:1fr;gap:12px}}

/* related posts */
.related-section{background:var(--bg-card);border-radius:var(--radius);padding:32px;margin-bottom:32px;box-shadow:var(--shadow-sm)}
.related-title{font-size:20px;font-weight:700;color:var(--primary);margin-bottom:24px;display:flex;align-items:center;gap:10px}
.related-title i{color:var(--secondary);font-size:18px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.related-card{display:flex;flex-direction:column;text-decoration:none;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--border);background:var(--bg-card);transition:var(--transition)}
.related-card:hover{border-color:var(--primary-light);box-shadow:var(--shadow);transform:translateY(-3px)}
.related-card .rel-img{width:100%;height:140px;object-fit:cover;background:var(--bg-alt)}
.related-card .rel-body{padding:14px 16px 16px;flex:1;display:flex;flex-direction:column}
.related-card .rel-cat{font-size:11px;color:var(--text-light);text-transform:uppercase;letter-spacing:0.5px;margin-bottom:6px}
.related-card .rel-title{font-size:14px;font-weight:600;color:var(--text);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:8px}
.related-card .rel-date{font-size:12px;color:var(--text-light);margin-top:auto}
@media(max-width:820px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.related-grid{grid-template-columns:1fr}.related-section{padding:20px}}

/* sidebar */
.sidebar-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;margin-bottom:24px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light)}
.sidebar-title{font-size:16px;font-weight:700;color:var(--primary);margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--secondary-light);display:flex;align-items:center;gap:8px}
.sidebar-title i{color:var(--secondary);font-size:14px}
.sidebar-list{list-style:none;padding:0}
.sidebar-list li{margin-bottom:2px}
.sidebar-list a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:14px;text-decoration:none;transition:var(--transition)}
.sidebar-list a:hover{background:var(--bg);color:var(--primary)}
.sidebar-list a i{font-size:12px;color:var(--text-light);width:16px;text-align:center}
.sidebar-list .active{background:var(--bg);color:var(--primary);font-weight:600}
.sidebar-cta{background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:var(--radius);padding:28px 24px;text-align:center;color:#fff}
.sidebar-cta h4{font-size:18px;font-weight:700;margin-bottom:8px;color:#fff}
.sidebar-cta p{font-size:14px;opacity:0.9;margin-bottom:16px;line-height:1.6}
.sidebar-cta .btn{display:inline-flex;align-items:center;gap:8px;padding:10px 28px;background:var(--secondary);color:var(--primary-dark);font-weight:600;border-radius:24px;font-size:14px;text-decoration:none;transition:var(--transition);border:none;cursor:pointer}
.sidebar-cta .btn:hover{background:var(--secondary-light);transform:translateY(-2px);box-shadow:0 4px 16px rgba(212,168,67,0.3)}
@media(max-width:820px){.sidebar-card{padding:20px}}

/* CTA */
.cta-section{background:linear-gradient(135deg,var(--primary),var(--primary-light));padding:56px 0;margin:0 0 0;color:#fff}
.cta-inner{max-width:var(--container);margin:0 auto;padding:0 24px;text-align:center}
.cta-inner h2{font-size:30px;font-weight:700;margin-bottom:12px;color:#fff;letter-spacing:-0.3px}
.cta-inner p{font-size:16px;opacity:0.9;max-width:600px;margin:0 auto 28px;line-height:1.7}
.cta-inner .btn-group{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.cta-inner .btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;background:var(--secondary);color:var(--primary-dark);font-weight:600;border-radius:30px;font-size:15px;text-decoration:none;transition:var(--transition);border:none;cursor:pointer}
.cta-inner .btn-primary:hover{background:var(--secondary-light);transform:translateY(-2px);box-shadow:0 6px 20px rgba(212,168,67,0.3)}
.cta-inner .btn-outline{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;background:transparent;color:#fff;font-weight:500;border-radius:30px;font-size:15px;text-decoration:none;transition:var(--transition);border:2px solid rgba(255,255,255,0.3);cursor:pointer}
.cta-inner .btn-outline:hover{background:rgba(255,255,255,0.1);border-color:rgba(255,255,255,0.6);transform:translateY(-2px)}
@media(max-width:768px){.cta-section{padding:40px 0}.cta-inner h2{font-size:24px}.cta-inner .btn-primary,.cta-inner .btn-outline{padding:12px 28px;font-size:14px}}

/* footer */
.footer{background:var(--primary-dark);color:rgba(255,255,255,0.8);padding:52px 0 0;font-size:14px;line-height:1.7}
.footer .container{max-width:var(--container);margin:0 auto;padding:0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,0.08)}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:12px;text-decoration:none}
.footer-logo .logo-icon{width:36px;height:36px;font-size:16px;background:rgba(255,255,255,0.12);color:var(--secondary);box-shadow:none}
.footer-logo .logo-text{color:#fff;font-size:18px}
.footer-logo .logo-text span{color:var(--secondary)}
.footer-brand p{font-size:13px;opacity:0.75;max-width:320px;line-height:1.8}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;letter-spacing:0.3px}
.footer-col a{display:block;color:rgba(255,255,255,0.65);text-decoration:none;padding:4px 0;font-size:13px;transition:var(--transition)}
.footer-col a:hover{color:var(--secondary);padding-left:4px}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;padding:20px 0;font-size:12px;color:rgba(255,255,255,0.5);gap:12px}
.footer-bottom a{color:rgba(255,255,255,0.6);text-decoration:none}
.footer-bottom a:hover{color:var(--secondary)}
@media(max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:680px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-brand p{max-width:100%}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media(max-width:768px){.footer .container{padding:0 16px}}

/* not found */
.not-found{text-align:center;padding:80px 20px;background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.not-found i{font-size:56px;color:var(--text-light);margin-bottom:20px;display:block}
.not-found h2{font-size:28px;font-weight:700;color:var(--primary);margin-bottom:12px}
.not-found p{color:var(--text-secondary);margin-bottom:24px;font-size:16px}
.not-found .btn-home{display:inline-flex;align-items:center;gap:8px;padding:12px 32px;background:var(--primary);color:#fff;border-radius:24px;font-size:15px;font-weight:500;text-decoration:none;transition:var(--transition)}
.not-found .btn-home:hover{background:var(--primary-light);transform:translateY(-2px);box-shadow:0 4px 16px rgba(30,58,95,0.25)}

/* misc */
.text-center{text-align:center}
.mt-16{margin-top:16px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.mb-32{margin-bottom:32px}