/* roulang page: index */
:root {
  --primary: #2E8BF5;
  --primary-dark: #1565C0;
  --primary-soft: #E8F1FC;
  --accent: #F07845;
  --accent-dark: #D95A2B;
  --bg-page: #F5F8FC;
  --bg-card: #FFFFFF;
  --bg-deep: #123C6E;
  --text-primary: #1B2A3A;
  --text-secondary: #5E7186;
  --text-muted: #9AABBC;
  --border: #DCE6F0;
  --divider: #EEF2F7;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-light: 0 2px 10px rgba(20, 60, 120, 0.06);
  --shadow-card: 0 6px 24px rgba(20, 60, 120, 0.10);
  --shadow-hover: 0 12px 32px rgba(20, 60, 120, 0.16);
  --transition: all 0.25s ease;
  --container-w: 1200px;
  --section-pad: 80px;
  --font: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--primary-dark);
}
img {
  max-width: 100%;
  display: block;
  height: auto;
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.grid-container {
  max-width: var(--container-w);
}
.section {
  padding: 80px 0;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
}
.section-head .subtitle {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 6px;
}
.section-head .more-link {
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  white-space: nowrap;
}
.section-head .more-link i {
  margin-left: 6px;
  font-size: 13px;
}
h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 600;
  color: var(--text-primary);
}
h2 {
  font-size: 28px;
  letter-spacing: 0.01em;
}
h3 {
  font-size: 18px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1;
  white-space: nowrap;
}
.btn i {
  margin-right: 8px;
  font-size: 14px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(21, 101, 192, 0.28);
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(46, 139, 245, 0.2);
  box-shadow: 0 0 0 3px rgba(46, 139, 245, 0.2);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.75);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}
.btn-secondary {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-secondary:hover {
  background: var(--primary-soft);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
  transform: translateY(-1px);
}
.btn-accent {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  height: 48px;
  padding: 0 32px;
  font-size: 16px;
  animation: breathe 2.8s ease-in-out infinite;
}
.btn-accent:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(240, 120, 69, 0.35);
}
@keyframes breathe {
  0%, 100% { box-shadow: 0 4px 18px rgba(240, 120, 69, 0.25); }
  50% { box-shadow: 0 8px 30px rgba(240, 120, 69, 0.45); }
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 500;
  font-size: 14px;
}
.text-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 500;
  background: var(--primary-soft);
  color: var(--primary-dark);
}
/* ====== Header ====== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  box-shadow: 0 1px 0 rgba(20, 60, 120, 0.06);
  transition: var(--transition);
}
.header-top {
  height: 36px;
  background: var(--bg-page);
  border-bottom: 1px solid var(--divider);
}
.header-top-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand-mini {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}
.brand-mini .logo-dot {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 12px;
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
}
.header-tools a {
  color: var(--text-secondary);
}
.header-tools a:hover {
  color: var(--primary);
}
.header-main {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition);
}
.header-main-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 24px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}
.brand-logo .logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 17px;
  box-shadow: 0 4px 12px rgba(46, 139, 245, 0.3);
}
.brand-logo:hover {
  color: var(--text-primary);
}
.nav-middle {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
  justify-content: flex-start;
  margin-left: 28px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-links li a {
  position: relative;
  display: inline-block;
  padding: 18px 14px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}
.nav-links li a:hover {
  color: var(--primary);
}
.nav-links li a.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.nav-heat {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  font-size: 12px;
}
.nav-heat .heat-label {
  color: var(--accent);
  font-weight: 600;
  background: rgba(240, 120, 69, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}
.nav-heat .heat-tag {
  color: var(--text-muted);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: #F0F4F9;
  transition: var(--transition);
}
.nav-heat .heat-tag:hover {
  background: var(--primary-soft);
  color: var(--primary);
}
.search-box {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 4px 6px 4px 14px;
  background: var(--bg-page);
  width: 210px;
  transition: var(--transition);
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46, 139, 245, 0.12);
}
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 13px;
  width: 100%;
  color: var(--text-primary);
}
.search-box input::placeholder {
  color: var(--text-muted);
}
.search-box button {
  background: var(--primary);
  border: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: var(--transition);
}
.search-box button:hover {
  background: var(--primary-dark);
}
.hamburger {
  display: none;
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 20px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.site-header.scrolled {
  box-shadow: 0 2px 12px rgba(20, 60, 120, 0.08);
}
.site-header.scrolled .header-top {
  height: 0;
  overflow: hidden;
  border-bottom: none;
}
.site-header.scrolled .header-top-inner {
  height: 0;
}
.site-header.scrolled .header-main-inner {
  height: 58px;
}
/* ====== Mobile Menu ====== */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100vh;
  background: #fff;
  z-index: 1500;
  padding: 24px;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
  transition: right 0.3s ease;
  overflow-y: auto;
}
.mobile-menu.open {
  right: 0;
}
.mm-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.mm-close {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text-secondary);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: var(--transition);
}
.mm-close:hover {
  background: var(--bg-page);
  color: var(--text-primary);
}
.mobile-menu .mm-nav {
  list-style: none;
}
.mobile-menu .mm-nav li a {
  display: block;
  padding: 14px 12px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.mobile-menu .mm-nav li a:hover,
.mobile-menu .mm-nav li a.active {
  background: var(--primary-soft);
  color: var(--primary-dark);
}
.mobile-menu .mm-search {
  margin: 16px 0 24px;
}
.mm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(27, 42, 58, 0.5);
  z-index: 1400;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.mm-overlay.show {
  opacity: 1;
  visibility: visible;
}
/* ====== Hero ====== */
.hero {
  position: relative;
  min-height: 520px;
  max-height: 700px;
  display: flex;
  align-items: center;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(18, 60, 110, 0.82) 0%, rgba(21, 101, 192, 0.65) 55%, rgba(21, 101, 192, 0.35) 100%);
  z-index: 1;
}
.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 90px 24px 110px;
}
.hero-copy {
  max-width: 640px;
  color: #fff;
}
.hero-copy h1 {
  font-size: 42px;
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  letter-spacing: 0.02em;
}
.hero-copy .hero-sub {
  font-size: 18px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.88);
  margin-top: 16px;
  line-height: 1.7;
  max-width: 560px;
}
.hero-ctas {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.hero-trust {
  display: flex;
  gap: 48px;
  margin-top: 52px;
  color: rgba(255, 255, 255, 0.7);
}
.trust-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.trust-item .num {
  font-size: 30px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
}
.trust-item .label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
}
/* ====== Quick Entry ====== */
.quick-section {
  margin-top: -30px;
  position: relative;
  z-index: 5;
  padding-bottom: 48px;
}
.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.quick-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  border: 1px solid rgba(220, 230, 240, 0.6);
}
.quick-card .icon-wrap {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  margin-bottom: 16px;
  transition: var(--transition);
}
.quick-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}
.quick-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}
.quick-card .quick-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}
.quick-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.quick-card:hover .icon-wrap {
  background: var(--primary);
  color: #fff;
}
/* ====== Stair Benefits ====== */
.stair-section {
  padding: 64px 0 80px;
}
.stair-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}
.stair-card {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  min-height: 340px;
  box-shadow: var(--shadow-light);
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.stair-card:nth-child(1) {
  margin-top: 48px;
}
.stair-card:nth-child(2) {
  margin-top: 24px;
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-card);
  position: relative;
}
.stair-card:nth-child(2)::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 4px;
  border-radius: 0 0 6px 6px;
  background: var(--primary);
}
.stair-card:nth-child(3) {
  margin-top: 0;
}
.stair-number {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.stair-badge {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--primary-soft);
  color: var(--primary-dark);
}
.stair-card:nth-child(2) .stair-badge {
  background: var(--accent);
  color: #fff;
}
.stair-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 18px;
}
.stair-list {
  list-style: none;
  flex: 1;
  margin: 0 0 24px;
}
.stair-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 7px 0;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.5;
}
.stair-list li i {
  color: var(--primary);
  font-size: 14px;
  margin-top: 4px;
  flex-shrink: 0;
}
.stair-card:nth-child(2) .stair-list li i {
  color: var(--accent);
}
.stair-cta {
  margin-top: auto;
}
/* ====== Plan Compare ====== */
.plan-section {
  padding: 64px 0 80px;
  background: #fff;
}
.plan-table-wrap {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  background: var(--bg-card);
  overflow-x: auto;
}
.plan-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  background: transparent;
}
.plan-table th,
.plan-table td {
  padding: 16px 20px;
  text-align: center;
  border-bottom: 1px solid var(--divider);
  font-size: 14px;
  color: var(--text-secondary);
}
.plan-table th {
  background: #F8FAFD;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}
.plan-table th:first-child,
.plan-table td:first-child {
  text-align: left;
  width: 160px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 400;
}
.plan-table .plan-name {
  font-size: 18px;
  font-weight: 600;
}
.plan-table .plan-price {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}
.plan-table .recommend-col {
  background: var(--primary-soft);
  border-left: 2px solid var(--primary);
  border-right: 2px solid var(--primary);
}
.plan-table .recommend-col th,
.plan-table .recommend-col td {
  background: var(--primary-soft);
}
.plan-table .recommend-tag {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 6px;
  font-weight: 500;
}
.plan-table .icon-yes {
  color: #22A06B;
  font-size: 16px;
}
.plan-table .icon-no {
  color: #B8C4D3;
  font-size: 16px;
}
.plan-table tr:last-child td {
  border-bottom: none;
  padding-top: 20px;
  padding-bottom: 20px;
}
/* ====== Limited Entry ====== */
.limited-section {
  position: relative;
  background: var(--bg-deep);
  padding: 70px 0;
  overflow: hidden;
}
.limited-section::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 42px solid rgba(255, 255, 255, 0.03);
  top: -180px;
  right: -80px;
}
.limited-section::after {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 30px solid rgba(255, 255, 255, 0.02);
  bottom: -120px;
  left: 12%;
}
.limited-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.limited-copy {
  flex: 1;
  min-width: 260px;
}
.limited-copy h2 {
  color: #fff;
  font-size: 28px;
  margin-bottom: 12px;
}
.limited-copy p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
}
.countdown-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}
.countdown-item {
  width: 82px;
  height: 74px;
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.countdown-item .num {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.countdown-item .unit {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 4px;
}
.limited-cta {
  flex-shrink: 0;
}
/* ====== News / CMS ====== */
.news-section {
  padding: 80px 0;
}
.news-layout {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 24px;
  align-items: start;
}
.news-feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  border: 1px solid var(--border);
}
.news-feature-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.feature-cover {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}
.feature-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-feature-card:hover .feature-cover img {
  transform: scale(1.03);
}
.feature-cat {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  color: var(--primary-dark);
  font-weight: 600;
}
.feature-body {
  padding: 22px 22px 24px;
}
.feature-body h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
  margin-bottom: 10px;
}
.feature-body h3 a {
  color: var(--text-primary);
}
.feature-body h3 a:hover {
  color: var(--primary);
}
.feature-body .feature-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.feature-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.feature-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-muted);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.news-list-item {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-light);
  border: 1px solid rgba(220, 230, 240, 0.5);
  transition: var(--transition);
}
.news-list-item:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.news-thumb {
  width: 120px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-page);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-info {
  flex: 1;
  min-width: 0;
}
.news-info h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-info h3 a {
  color: var(--text-primary);
}
.news-info h3 a:hover {
  color: var(--primary);
}
.news-info .news-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}
.news-meta .cat {
  color: var(--primary);
  font-weight: 500;
}
.news-arrow {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 14px;
  flex-shrink: 0;
  transition: var(--transition);
}
.news-list-item:hover .news-arrow {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-light);
  border: 1px dashed var(--border);
  color: var(--text-muted);
  font-size: 15px;
}
/* ====== FAQ ====== */
.faq-section {
  padding: 64px 0 80px;
  background: #fff;
}
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--divider);
  transition: var(--transition);
}
.faq-item:first-child {
  border-top: 1px solid var(--divider);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 15px 4px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  min-height: 52px;
  text-align: left;
  transition: var(--transition);
}
.faq-q:hover {
  color: var(--primary);
}
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: transform 0.25s ease, background 0.25s ease;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease, padding 0.25s ease;
  padding: 0 4px;
}
.faq-item.open .faq-a {
  max-height: 300px;
  padding: 0 4px 20px;
}
.faq-a-inner {
  background: #F0F5FA;
  border-radius: var(--radius-md);
  padding: 18px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}
/* ====== Consult Form ====== */
.consult-section {
  padding: 70px 0;
  background: #F0F5FA;
}
.consult-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.consult-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
}
.consult-info {
  background: var(--bg-deep);
  color: #fff;
  padding: 40px 36px;
}
.consult-info h3 {
  color: #fff;
  font-size: 22px;
  margin-bottom: 14px;
}
.consult-info > p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
  margin-bottom: 28px;
  line-height: 1.7;
}
.consult-contact {
  list-style: none;
  margin: 0;
}
.consult-contact li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}
.consult-contact li i {
  color: var(--accent);
  width: 18px;
  text-align: center;
  margin-top: 3px;
}
.consult-form {
  padding: 40px 36px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  height: 44px;
  border: 1px solid #D6E2EF;
  border-radius: var(--radius-sm);
  padding: 0 14px;
  font-size: 14px;
  background: #fff;
  transition: var(--transition);
  outline: none;
}
.form-group textarea {
  height: 120px;
  padding: 12px 14px;
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46, 139, 245, 0.15);
}
.form-check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
  cursor: pointer;
}
.form-check input {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}
.form-submit {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
/* ====== Footer ====== */
.site-footer {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}
.footer-top {
  padding: 56px 0 40px;
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 40px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand .logo-icon {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
}
.footer-top p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 360px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-links {
  list-style: none;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}
.footer-links a:hover {
  color: #fff;
}
.footer-contact {
  list-style: none;
  margin: 0;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}
.footer-contact li i {
  color: var(--accent);
  margin-top: 4px;
  width: 16px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}
.footer-bottom .site-link {
  color: rgba(255, 255, 255, 0.55);
}
.footer-bottom .site-link:hover {
  color: #fff;
}
/* ====== Responsive ====== */
@media screen and (max-width: 1024px) {
  :root {
    --section-pad: 64px;
  }
  .section {
    padding: 64px 0;
  }
  .quick-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stair-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .stair-card:nth-child(1) {
    margin-top: 24px;
  }
  .stair-card:nth-child(2) {
    margin-top: 12px;
  }
  .news-layout {
    grid-template-columns: 1fr;
  }
  .consult-grid {
    grid-template-columns: 1fr;
  }
  .nav-heat {
    display: none;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media screen and (max-width: 768px) {
  :root {
    --section-pad: 48px;
  }
  .section {
    padding: 48px 0;
  }
  .hero-copy h1 {
    font-size: 32px;
  }
  .hero-copy .hero-sub {
    font-size: 17px;
  }
  .stair-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .stair-card:nth-child(1),
  .stair-card:nth-child(2) {
    margin-top: 0;
  }
  .stair-card {
    min-height: auto;
  }
  .limited-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;
  }
  .countdown-item {
    width: 70px;
    height: 64px;
  }
  .countdown-item .num {
    font-size: 24px;
  }
  .news-list-item {
    padding: 12px;
    gap: 12px;
  }
  .news-thumb {
    width: 96px;
    height: 64px;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .search-box {
    display: none;
  }
  .nav-middle {
    margin-left: 0;
  }
  .nav-links {
    display: none;
  }
  .hamburger {
    display: inline-flex;
  }
  .header-main-inner {
    height: 58px;
  }
  .brand-logo {
    font-size: 17px;
  }
  .hero {
    min-height: 480px;
  }
  .hero-trust {
    gap: 20px;
    flex-wrap: wrap;
  }
}
@media screen and (max-width: 640px) {
  .container,
  .header-top-inner,
  .header-main-inner {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero-inner {
    padding: 60px 16px 80px;
  }
  .hero-copy h1 {
    font-size: 28px;
  }
  .hero-ctas {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-ctas .btn {
    width: 100%;
  }
  .hero-trust {
    gap: 12px;
    justify-content: space-between;
  }
  .trust-item .num {
    font-size: 22px;
  }
  .quick-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .quick-card {
    padding: 20px 16px;
  }
  .quick-card .icon-wrap {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .news-list-item {
    flex-direction: column;
    align-items: flex-start;
  }
  .news-thumb {
    width: 100%;
    height: 140px;
  }
  .news-arrow {
    display: none;
  }
  .consult-form,
  .consult-info {
    padding: 28px 20px;
  }
  .form-submit .btn {
    width: 100%;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .countdown-wrap {
    gap: 8px;
  }
  .countdown-item {
    width: 64px;
    height: 58px;
  }
  .countdown-item .num {
    font-size: 22px;
  }
  .limited-copy h2 {
    font-size: 23px;
  }
}

/* roulang page: category1 */
:root{
  --primary:#2E8BF5;
  --primary-dark:#1565C0;
  --primary-soft:#E8F1FC;
  --accent:#F07845;
  --bg-page:#F5F8FC;
  --bg-card:#FFFFFF;
  --bg-deep:#123C6E;
  --text-primary:#1B2A3A;
  --text-secondary:#5E7186;
  --text-muted:#9AABBC;
  --border:#DCE6F0;
  --divider:#EEF2F7;
  --radius-lg:14px;
  --radius-md:8px;
  --radius-sm:10px;
  --shadow-light:0 2px 10px rgba(20,60,120,.06);
  --shadow-card:0 6px 24px rgba(20,60,120,.10);
  --shadow-hover:0 12px 32px rgba(20,60,120,.16);
  --transition:all .25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  background:var(--bg-page);
  color:var(--text-primary);
  line-height:1.6;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.grid-x{display:flex;flex-wrap:wrap}
.cell{flex:0 0 auto;min-height:0}
.small-12{width:100%}
.medium-6{width:50%}
.large-4{width:33.333%}
.large-3{width:25%}
.large-5{width:41.666%}
.large-7{width:58.333%}
@media(max-width:1024px){
  .medium-6{width:50%}
  .large-4{width:50%}
}
@media(max-width:640px){
  .medium-6,.large-4,.large-3{width:100%}
  .container{padding:0 16px}
}
/* Header */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:#fff;box-shadow:var(--shadow-light);
}
.header-top{
  background:#fff;
  border-bottom:1px solid var(--divider);
  height:36px;
}
.header-top-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:100%;display:flex;align-items:center;justify-content:space-between;
}
.brand-mini{
  display:flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--text-primary);
}
.brand-mini .logo-dot{
  width:22px;height:22px;border-radius:6px;
  background:var(--primary-soft);color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;font-size:11px;
}
.header-tools a{
  font-size:13px;color:var(--text-secondary);margin-left:18px;
}
.header-tools a:hover{color:var(--primary)}
.header-main{
  height:58px;background:#fff;
}
.header-main-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:100%;display:flex;align-items:center;gap:24px;
}
.brand-logo{
  display:flex;align-items:center;gap:10px;
  font-size:20px;font-weight:700;color:var(--text-primary);
  white-space:nowrap;flex-shrink:0;
}
.logo-icon{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:15px;
}
.nav-middle{
  display:flex;align-items:center;gap:20px;flex:1;min-width:0;
}
.nav-links{
  display:flex;align-items:center;gap:4px;list-style:none;
}
.nav-links li a{
  display:block;padding:8px 14px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--text-primary);
  position:relative;
}
.nav-links li a:hover{
  color:var(--primary);background:var(--primary-soft);
}
.nav-links li a.active{
  color:var(--primary);font-weight:600;
}
.nav-links li a.active::after{
  content:'';position:absolute;left:14px;right:14px;bottom:2px;
  height:2px;background:var(--primary);border-radius:2px;
}
.nav-heat{
  display:flex;align-items:center;gap:6px;margin-left:auto;
}
.heat-label{
  font-size:12px;font-weight:500;color:#fff;
  background:var(--accent);padding:2px 8px;border-radius:999px;
}
.heat-tag{
  font-size:12px;color:var(--text-secondary);
  background:#F0F4F9;padding:4px 10px;border-radius:999px;
  white-space:nowrap;
}
.heat-tag:hover{
  background:var(--primary-soft);color:var(--primary);
}
.search-box{
  display:flex;align-items:center;gap:0;
  width:220px;flex-shrink:0;
}
.search-box input{
  width:100%;height:36px;border:1px solid var(--border);
  border-radius:8px 0 0 8px;padding:0 12px;font-size:13px;
  outline:none;transition:var(--transition);
}
.search-box input:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(46,139,245,.15);
}
.search-box button{
  width:38px;height:36px;border:none;background:var(--primary);color:#fff;
  border-radius:0 8px 8px 0;cursor:pointer;transition:var(--transition);
}
.search-box button:hover{background:var(--primary-dark)}
.hamburger{
  display:none;width:40px;height:40px;border:none;background:transparent;
  font-size:20px;color:var(--text-primary);cursor:pointer;border-radius:8px;
}
.hamburger:hover{background:var(--primary-soft)}
/* Scroll state */
.site-header.scrolled .header-top{display:none}
.site-header.scrolled .header-main{height:56px}
.site-header.scrolled{box-shadow:0 2px 12px rgba(20,60,120,.08);background:rgba(255,255,255,.92);backdrop-filter:blur(12px)}
/* Mobile nav */
.mobile-nav{
  display:none;background:#fff;border-top:1px solid var(--divider);
  padding:16px 0 20px;box-shadow:var(--shadow-card);
}
.mobile-nav.open{display:block}
.mobile-nav .mobile-nav-links{
  padding:0 24px;margin-bottom:16px;
}
.mobile-nav .mobile-nav-links a{
  display:block;padding:10px 8px;font-size:15px;font-weight:500;
  color:var(--text-primary);border-bottom:1px solid var(--divider);
}
.mobile-nav .mobile-nav-links a:last-child{border-bottom:none}
.mobile-nav .mobile-nav-links a.active{color:var(--primary);background:var(--primary-soft);border-radius:8px;padding-left:14px}
.mobile-nav .mobile-heat{
  padding:0 24px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;
}
.mobile-nav .mobile-search{
  padding:0 24px;margin:16px 0;
}
.mobile-nav .mobile-search input{
  width:100%;height:40px;border:1px solid var(--border);border-radius:8px;
  padding:0 14px;font-size:14px;outline:none;
}
.mobile-nav .mobile-search input:focus{border-color:var(--primary)}
@media(max-width:900px){
  .nav-middle{display:none}
  .search-box{display:none}
  .hamburger{display:inline-flex;align-items:center;justify-content:center;margin-left:auto}
  .brand-logo{font-size:18px}
  .header-main-inner{gap:12px}
}
/* ===== Hero ===== */
.cat-hero{
  position:relative;
  min-height:380px;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  display:flex;align-items:center;
}
.cat-hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(18,60,110,.88) 0%,rgba(21,101,192,.75) 55%,rgba(46,139,245,.6) 100%);
}
.cat-hero .hero-content{
  position:relative;z-index:2;width:100%;
  padding:80px 0;
}
.cat-hero .breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:rgba(255,255,255,.75);margin-bottom:20px;
}
.cat-hero .breadcrumb a{color:rgba(255,255,255,.85)}
.cat-hero .breadcrumb a:hover{color:#fff}
.cat-hero .breadcrumb .sep{opacity:.5}
.cat-hero h1{
  font-size:42px;font-weight:700;color:#fff;
  line-height:1.25;margin-bottom:18px;
}
.cat-hero .hero-desc{
  max-width:720px;font-size:17px;
  color:rgba(255,255,255,.9);line-height:1.8;margin-bottom:28px;
}
.cat-hero .hero-ctas{
  display:flex;gap:16px;flex-wrap:wrap;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 28px;border-radius:8px;
  font-size:15px;font-weight:500;border:none;cursor:pointer;
  transition:var(--transition);
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{
  background:var(--primary-dark);color:#fff;
  transform:translateY(-2px);box-shadow:var(--shadow-hover);
}
.btn-outline{
  background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.85);
}
.btn-outline:hover{
  background:rgba(255,255,255,.15);color:#fff;
  transform:translateY(-2px);
}
@media(max-width:640px){
  .cat-hero{min-height:340px}
  .cat-hero h1{font-size:30px}
  .cat-hero .hero-desc{font-size:15px}
  .btn{width:100%}
}
/* ===== Section common ===== */
.cat-section{
  padding:80px 0;
}
.cat-section .section-head{
  margin-bottom:40px;
}
.cat-section .section-eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-soft);padding:4px 14px;border-radius:999px;
  margin-bottom:12px;
}
.cat-section .section-title{
  font-size:30px;font-weight:700;color:var(--text-primary);
  line-height:1.35;margin-bottom:12px;
}
.cat-section .section-sub{
  font-size:15px;color:var(--text-secondary);
  max-width:640px;line-height:1.7;
}
@media(max-width:640px){
  .cat-section{padding:48px 0}
  .cat-section .section-title{font-size:24px}
}
/* ===== Feature cards ===== */
.feature-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  margin-top:40px;
}
.feature-card{
  background:var(--bg-card);border-radius:var(--radius-lg);
  padding:32px 24px;box-shadow:var(--shadow-light);
  border:1px solid rgba(220,230,240,.6);
  transition:var(--transition);
  text-align:center;
}
.feature-card:hover{
  transform:translateY(-4px);box-shadow:var(--shadow-card);
  border-color:var(--primary);
}
.feature-card .feature-icon{
  width:56px;height:56px;border-radius:14px;
  background:var(--primary-soft);color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:24px;margin-bottom:18px;
}
.feature-card:hover .feature-icon{
  background:var(--primary);color:#fff;
}
.feature-card h3{
  font-size:17px;font-weight:600;color:var(--text-primary);
  margin-bottom:10px;
}
.feature-card p{
  font-size:14px;color:var(--text-secondary);line-height:1.7;
}
@media(max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .feature-grid{grid-template-columns:1fr}
}
/* ===== Scenarios ===== */
.scenario-section{background:#fff}
.scenario-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-top:40px;
}
.scenario-card{
  background:var(--bg-page);border-radius:var(--radius-lg);
  padding:28px 24px;border-left:3px solid var(--primary);
  transition:var(--transition);
}
.scenario-card:hover{
  background:var(--primary-soft);transform:translateX(4px);
}
.scenario-card .scenario-no{
  font-size:13px;font-weight:600;color:var(--primary);
  margin-bottom:8px;
}
.scenario-card h3{
  font-size:18px;font-weight:600;color:var(--text-primary);
  margin-bottom:10px;
}
.scenario-card p{
  font-size:14px;color:var(--text-secondary);line-height:1.7;
}
@media(max-width:1024px){
  .scenario-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .scenario-grid{grid-template-columns:1fr}
}
/* ===== Steps ===== */
.steps-section{
  background:linear-gradient(180deg,#fff 0%,var(--bg-page) 100%);
}
.steps-wrap{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  margin-top:48px;position:relative;
}
.steps-wrap::before{
  content:'';position:absolute;top:32px;left:60px;right:60px;
  height:2px;background:linear-gradient(90deg,var(--primary-soft),var(--primary),var(--primary-soft));
  z-index:0;
}
.step-item{
  position:relative;z-index:1;text-align:center;
  padding:0 12px;
}
.step-dot{
  width:64px;height:64px;border-radius:50%;
  background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:600;margin-bottom:18px;
  box-shadow:0 0 0 6px var(--primary-soft);
}
.step-item h3{
  font-size:16px;font-weight:600;color:var(--text-primary);
  margin-bottom:8px;
}
.step-item p{
  font-size:14px;color:var(--text-secondary);line-height:1.6;
}
@media(max-width:1024px){
  .steps-wrap{grid-template-columns:repeat(2,1fr);gap:32px 24px}
  .steps-wrap::before{display:none}
}
@media(max-width:640px){
  .steps-wrap{grid-template-columns:1fr}
}
/* ===== Benefits ===== */
.benefits-section{background:#fff}
.benefit-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-top:40px;
}
.benefit-card{
  background:var(--bg-card);border-radius:var(--radius-lg);
  padding:32px 28px;box-shadow:var(--shadow-light);
  border:1px solid var(--divider);
  position:relative;overflow:hidden;
  transition:var(--transition);
}
.benefit-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:4px;
  background:var(--primary);opacity:0;
  transition:var(--transition);
}
.benefit-card:hover::before{opacity:1}
.benefit-card:hover{box-shadow:var(--shadow-card);transform:translateY(-2px)}
.benefit-tag{
  display:inline-block;font-size:12px;font-weight:500;
  padding:4px 12px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary);
  margin-bottom:14px;
}
.benefit-card h3{
  font-size:18px;font-weight:600;color:var(--text-primary);
  margin-bottom:12px;
}
.benefit-card ul{margin:0}
.benefit-card ul li{
  display:flex;align-items:flex-start;gap:8px;
  font-size:14px;color:var(--text-secondary);
  padding:6px 0;line-height:1.6;
}
.benefit-card ul li i{
  color:var(--primary);font-size:14px;margin-top:4px;
}
@media(max-width:1024px){
  .benefit-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .benefit-grid{grid-template-columns:1fr}
}
/* ===== Static Content Cards ===== */
.content-cards{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-top:40px;
}
.content-card{
  background:var(--bg-card);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-light);
  transition:var(--transition);
  border:1px solid var(--divider);
  display:flex;flex-direction:column;
}
.content-card:hover{
  transform:translateY(-4px);box-shadow:var(--shadow-card);
}
.content-card .card-cover{
  display:block;overflow:hidden;position:relative;aspect-ratio:16/9;
  background:var(--primary-soft);
}
.content-card .card-cover img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s ease;
}
.content-card:hover .card-cover img{transform:scale(1.03)}
.card-tag{
  position:absolute;top:12px;left:12px;
  background:rgba(255,255,255,.92);backdrop-filter:blur(4px);
  font-size:12px;font-weight:500;color:var(--text-primary);
  padding:4px 12px;border-radius:999px;
  z-index:2;
}
.card-body{
  padding:20px;display:flex;flex-direction:column;flex:1;
}
.card-body h3{
  font-size:17px;font-weight:600;color:var(--text-primary);
  line-height:1.45;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;
}
.card-body p{
  font-size:14px;color:var(--text-secondary);line-height:1.7;
  margin-bottom:14px;flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;
  overflow:hidden;
}
.card-meta{
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-muted);
  border-top:1px solid var(--divider);padding-top:14px;
}
.card-meta a{
  font-weight:500;color:var(--primary);
}
.card-meta a:hover{color:var(--primary-dark)}
@media(max-width:1024px){
  .content-cards{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .content-cards{grid-template-columns:1fr}
}
/* ===== About ===== */
.about-block{
  background:var(--primary-soft);
  border-radius:var(--radius-lg);
  padding:48px 40px;margin-top:48px;
  border:1px solid rgba(46,139,245,.15);
}
.about-block h2{
  font-size:24px;font-weight:700;color:var(--text-primary);
  margin-bottom:16px;
}
.about-block p{
  font-size:15px;color:var(--text-secondary);line-height:1.8;
  margin-bottom:14px;
}
.about-block p:last-child{margin-bottom:0}
@media(max-width:640px){
  .about-block{padding:28px 20px}
}
/* ===== FAQ ===== */
.faq-section{background:#fff}
.faq-wrap{
  max-width:860px;margin:40px auto 0;
}
.faq-list{
  border-top:1px solid var(--divider);
}
.faq-item{
  border-bottom:1px solid var(--divider);
}
.faq-question{
  display:flex;align-items:center;justify-content:space-between;
  width:100%;min-height:52px;padding:14px 8px;
  background:transparent;border:none;cursor:pointer;
  font-size:16px;font-weight:500;color:var(--text-primary);
  text-align:left;transition:var(--transition);
}
.faq-question:hover{color:var(--primary)}
.faq-question .faq-icon{
  width:28px;height:28px;border-radius:50%;
  background:var(--primary-soft);color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;transition:transform .2s ease;
  flex-shrink:0;margin-left:14px;
}
.faq-item.open .faq-icon{
  transform:rotate(45deg);
  background:var(--primary);color:#fff;
}
.faq-answer{
  display:none;
  padding:0 12px 20px 8px;
  font-size:14px;color:var(--text-secondary);line-height:1.7;
}
.faq-answer p{
  background:#F0F5FA;border-radius:10px;
  padding:16px 20px;line-height:1.7;margin:0;
}
@media(max-width:640px){
  .faq-question{font-size:15px}
}
/* ===== CTA ===== */
.cta-band{
  background:var(--bg-deep);padding:56px 0;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:'';position:absolute;top:-60px;right:-40px;
  width:300px;height:300px;border-radius:50%;
  background:rgba(255,255,255,.04);
}
.cta-band .container{
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-text h2{
  font-size:26px;font-weight:600;color:#fff;margin-bottom:8px;
}
.cta-text p{
  font-size:15px;color:rgba(255,255,255,.75);
  line-height:1.7;
}
.cta-btn{
  background:var(--accent);color:#fff;
  height:48px;padding:0 36px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:8px;font-size:16px;font-weight:500;
  border:none;cursor:pointer;transition:var(--transition);
  animation:cta-breathe 2s ease-in-out infinite;
}
.cta-btn:hover{
  background:#E06635;color:#fff;
  transform:translateY(-2px);
}
@keyframes cta-breathe{
  0%,100%{box-shadow:0 0 0 0 rgba(240,120,69,.4)}
  50%{box-shadow:0 0 0 8px rgba(240,120,69,0)}
}
@media(max-width:640px){
  .cta-band .container{flex-direction:column;text-align:center}
  .cta-btn{width:100%}
}
/* ===== Footer ===== */
.site-footer{
  background:var(--bg-deep);color:rgba(255,255,255,.6);
  padding-top:60px;font-size:14px;
}
.footer-top{
  display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  font-size:18px;font-weight:600;color:#fff;
  margin-bottom:14px;
}
.footer-brand .logo-icon{
  width:30px;height:30px;border-radius:8px;
  background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;
}
.footer-top p{
  line-height:1.7;margin-bottom:0;max-width:320px;
}
.footer-title{
  font-size:15px;font-weight:500;color:#fff;
  margin-bottom:14px;
}
.footer-links li{
  margin-bottom:8px;
}
.footer-links a{
  color:rgba(255,255,255,.6);font-size:14px;
}
.footer-links a:hover{color:#fff}
.footer-contact li{
  display:flex;align-items:center;gap:10px;
  margin-bottom:10px;font-size:14px;
}
.footer-contact i{
  width:18px;color:var(--primary);
}
.footer-bottom{
  padding:24px 0 28px;
  display:flex;justify-content:center;align-items:center;
  font-size:13px;color:rgba(255,255,255,.45);
  border-top:1px solid rgba(255,255,255,.06);
  text-align:center;
}
.footer-bottom a{
  color:rgba(255,255,255,.6);margin:0 6px;
}
.footer-bottom a:hover{color:#fff}
.site-link{margin:0 4px}
@media(max-width:1024px){
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:640px){
  .footer-top{grid-template-columns:1fr;gap:28px}
  .site-footer{padding-top:40px}
  .footer-top p{max-width:100%}
  .footer-bottom{flex-direction:column;gap:6px}
}

/* roulang page: article */
:root {
            --primary: #2E8BF5;
            --primary-dark: #1565C0;
            --primary-soft: #E8F1FC;
            --accent: #F07845;
            --bg-page: #F5F8FC;
            --bg-card: #FFFFFF;
            --bg-deep: #123C6E;
            --text-primary: #1B2A3A;
            --text-secondary: #5E7186;
            --text-muted: #9AABBC;
            --border: #DCE6F0;
            --divider: #EEF2F7;
            --radius-lg: 14px;
            --radius-md: 8px;
            --radius-sm: 10px;
            --shadow-light: 0 2px 10px rgba(20, 60, 120, 0.06);
            --shadow-card: 0 6px 24px rgba(20, 60, 120, 0.10);
            --shadow-hover: 0 12px 32px rgba(20, 60, 120, 0.16);
            --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --container-w: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

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

        button,
        input,
        textarea,
        select {
            font-family: var(--font-family);
            font-size: 14px;
        }

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

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            box-shadow: var(--shadow-light);
            transition: background .3s ease, box-shadow .3s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 2px 12px rgba(20, 60, 120, 0.08);
        }

        .site-header.scrolled .header-top {
            max-height: 0;
            opacity: 0;
            overflow: hidden;
            padding-top: 0;
            padding-bottom: 0;
        }

        .header-top {
            background: #F0F5FA;
            border-bottom: 1px solid var(--divider);
            transition: max-height .3s ease, opacity .3s ease, padding .3s ease;
            max-height: 36px;
            overflow: hidden;
        }

        .header-top-inner {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 6px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 36px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .header-top-inner a {
            color: var(--text-secondary);
            font-size: 13px;
        }

        .header-top-inner a:hover {
            color: var(--primary);
        }

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

        .logo-dot {
            width: 18px;
            height: 18px;
            border-radius: 6px;
            background: var(--primary-soft);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
        }

        .header-tools {
            display: flex;
            gap: 16px;
        }

        .header-main {
            background: transparent;
        }

        .header-main-inner {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            height: 58px;
            gap: 28px;
            position: relative;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            flex-shrink: 0;
            transition: opacity .2s;
        }

        .brand-logo:hover {
            color: var(--text-primary);
            opacity: .9;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }

        .nav-middle {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 8px;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            display: block;
            padding: 6px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            position: relative;
            transition: color .2s, background .2s;
        }

        .nav-links li a:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

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

        .nav-links li a.active::after {
            content: "";
            display: block;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            margin-top: 3px;
        }

        .nav-heat {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            margin-left: 6px;
        }

        .heat-label {
            font-size: 12px;
            color: var(--accent);
            background: rgba(240, 120, 69, 0.12);
            padding: 2px 8px;
            border-radius: 999px;
            font-weight: 600;
        }

        .heat-tag {
            font-size: 12px;
            color: var(--text-secondary);
            background: #F0F5FA;
            padding: 3px 10px;
            border-radius: 999px;
            transition: background .2s, color .2s;
        }

        .heat-tag:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .search-box {
            display: flex;
            align-items: center;
            background: #F0F5FA;
            border: 1px solid transparent;
            border-radius: 999px;
            padding: 0 6px 0 14px;
            height: 36px;
            width: 200px;
            transition: border-color .2s, box-shadow .2s, width .2s;
            flex-shrink: 0;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 139, 245, 0.15);
            width: 220px;
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 13px;
            flex: 1;
            height: 100%;
            color: var(--text-primary);
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .search-box button {
            border: none;
            background: var(--primary);
            color: #fff;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background .2s;
        }

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

        .hamburger {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            width: 40px;
            height: 40px;
            font-size: 18px;
            color: var(--text-primary);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        /* ===== Article Head Section ===== */
        .article-main {
            padding-top: 94px;
        }

        .article-head-section {
            background: linear-gradient(180deg, #F0F5FA 0%, #FFFFFF 100%);
            padding: 40px 0 32px;
            border-bottom: 1px solid var(--divider);
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .article-breadcrumb a {
            color: var(--text-secondary);
            font-size: 13px;
        }

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

        .article-breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }

        .article-breadcrumb .current {
            color: var(--text-secondary);
            max-width: 400px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-h1 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            max-width: 840px;
            margin-bottom: 18px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 18px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .meta-cat {
            background: var(--primary-soft);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 999px;
            font-weight: 500;
            font-size: 12px;
        }

        .meta-time,
        .meta-author,
        .meta-views {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .meta-time i,
        .meta-author i,
        .meta-views i {
            color: var(--text-muted);
            font-size: 12px;
        }

        /* ===== Article Body ===== */
        .article-body-section {
            padding: 48px 0 24px;
        }

        .article-body-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-light);
            padding: 48px 52px;
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-primary);
            word-wrap: break-word;
            overflow-wrap: break-word;
        }

        .article-content p {
            margin-bottom: 24px;
            line-height: 1.85;
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 600;
            line-height: 1.4;
            margin: 36px 0 16px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--divider);
        }

        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.4;
            margin: 28px 0 12px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 24px 20px;
            padding-left: 8px;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 8px;
            line-height: 1.8;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-soft);
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-secondary);
            font-style: normal;
        }

        .article-content img {
            border-radius: 12px;
            margin: 24px 0 8px;
            box-shadow: var(--shadow-light);
        }

        .article-content figcaption,
        .article-content .wp-caption-text {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            padding: 6px 0 12px;
        }

        .article-content code {
            background: #F0F5FA;
            border-radius: 4px;
            padding: 2px 6px;
            font-size: 14px;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
        }

        .article-content pre {
            background: #1B2A3A;
            color: #D6E2EF;
            border-radius: var(--radius-md);
            padding: 20px;
            margin: 24px 0;
            overflow-x: auto;
            line-height: 1.6;
        }

        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .article-content a {
            border-bottom: 1px solid rgba(46, 139, 245, 0.35);
        }

        .article-content a:hover {
            border-bottom-color: var(--primary);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            font-size: 14px;
        }

        .article-content table th {
            background: var(--primary-soft);
            font-weight: 600;
        }

        .article-content iframe,
        .article-content video {
            max-width: 100%;
            border-radius: var(--radius-sm);
            margin: 24px 0;
        }

        /* ===== Article Not Found ===== */
        .article-not-found {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-light);
            padding: 80px 40px;
            text-align: center;
        }

        .article-not-found p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* ===== Tags ===== */
        .article-tags-section {
            padding: 16px 0 32px;
        }

        .article-tags {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-right: 6px;
        }

        .tag-chip {
            background: #F0F5FA;
            color: var(--text-secondary);
            border: 1px solid transparent;
            font-size: 12px;
            padding: 4px 14px;
            border-radius: 999px;
            transition: background .2s, color .2s, border-color .2s;
        }

        .tag-chip:hover {
            background: var(--primary-soft);
            color: var(--primary);
            border-color: rgba(46, 139, 245, 0.2);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 48px 0 40px;
            background: var(--bg-page);
        }

        .related-title {
            font-size: 26px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: center;
            margin-bottom: 32px;
            position: relative;
        }

        .related-title::after {
            content: "";
            display: block;
            width: 48px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
            margin: 12px auto 0;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-light);
            border: 1px solid var(--border);
            transition: transform .25s ease, box-shadow .25s ease;
            display: block;
            color: var(--text-primary);
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            color: var(--text-primary);
        }

        .related-card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-radius: 0;
            overflow: hidden;
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform .3s ease;
        }

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

        .related-card-content {
            padding: 18px 20px 20px;
        }

        .related-card-content h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            color: var(--text-primary);
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .related-card-content p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .related-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
        }

        .related-card-meta .cat {
            background: var(--primary-soft);
            color: var(--primary);
            padding: 2px 10px;
            border-radius: 999px;
            font-weight: 500;
            font-size: 11px;
        }

        /* ===== Return Section ===== */
        .article-return-section {
            padding: 16px 0 64px;
            background: var(--bg-page);
        }

        .article-return-inner {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-md);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            border: none;
            cursor: pointer;
            transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
            text-decoration: none;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
            color: #fff;
            text-decoration: none;
        }

        .btn-primary:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(46, 139, 245, 0.25);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-md);
            background: #fff;
            border: 1px solid var(--primary);
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: background .2s, border-color .2s, transform .2s;
            text-decoration: none;
        }

        .btn-secondary:hover {
            background: var(--primary-soft);
            color: var(--primary);
            transform: translateY(-1px);
            text-decoration: none;
        }

        .btn-text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            height: 44px;
            padding: 0 8px;
            border: none;
            background: transparent;
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: color .2s;
            text-decoration: none;
        }

        .btn-text-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
            background: transparent;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 24px;
            margin-top: 0;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand .logo-icon {
            width: 30px;
            height: 30px;
            font-size: 14px;
            border-radius: 8px;
        }

        .footer-top .footer-brand p {
            font-size: 14px;
        }

        .footer-top p {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-title::after {
            content: "";
            display: block;
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            margin-top: 8px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            transition: color .2s, padding-left .2s;
        }

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

        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.6;
        }

        .footer-contact li i {
            width: 16px;
            color: var(--primary);
            font-size: 13px;
            flex-shrink: 0;
        }

        .footer-bottom {
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: color .2s;
        }

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

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

        /* ===== Mobile menu ===== */
        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: 94px;
            left: 0;
            right: 0;
            background: #fff;
            box-shadow: var(--shadow-card);
            padding: 20px 24px 24px;
            z-index: 999;
            border-top: 1px solid var(--divider);
        }

        .mobile-menu-panel.show {
            display: block;
        }

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

        .mobile-menu-panel .nav-links li a {
            padding: 12px 16px;
            font-size: 16px;
        }

        .mobile-menu-panel .nav-heat {
            margin-top: 16px;
            padding-top: 12px;
            border-top: 1px solid var(--divider);
            flex-wrap: wrap;
        }

        .mobile-menu-panel .search-box {
            width: 100%;
            margin-top: 14px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .header-main-inner {
                padding: 0 20px;
            }

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

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

            .header-top-inner {
                padding: 6px 16px;
            }

            .header-main-inner {
                padding: 0 16px;
                height: 58px;
            }

            .header-tools {
                display: none;
            }

            .nav-middle {
                display: none;
            }

            .search-box {
                display: none;
            }

            .hamburger {
                display: flex;
            }

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

            .brand-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .article-main {
                padding-top: 94px;
            }

            .article-head-section {
                padding: 28px 0 24px;
            }

            .article-h1 {
                font-size: 26px;
                line-height: 1.4;
            }

            .article-meta {
                gap: 8px 12px;
                font-size: 12px;
            }

            .article-body-section {
                padding: 24px 0 8px;
            }

            .article-content {
                padding: 24px 20px;
                font-size: 15px;
            }

            .article-content h2 {
                font-size: 20px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .article-tags-section {
                padding: 12px 0 24px;
            }

            .related-section {
                padding: 32px 0 24px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .article-return-section {
                padding: 8px 0 40px;
            }

            .article-return-inner {
                flex-direction: column;
                align-items: stretch;
            }

            .article-return-inner .btn-secondary,
            .article-return-inner .btn-text-link {
                width: 100%;
            }

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

            .site-footer {
                padding: 40px 0 20px;
            }

            .mobile-menu-panel {
                top: 58px;
            }
        }

        /* ===== Base utility ===== */
        .text-center {
            text-align: center;
        }

        .mt-20 {
            margin-top: 20px;
        }

        .mb-20 {
            margin-bottom: 20px;
        }