/* roulang page: index */
:root {
  --primary: #4D9FD8;
  --primary-dark: #175A87;
  --accent: #59C1BD;
  --warm: #FF9F5A;
  --bg: #F2F6FA;
  --card: #FFFFFF;
  --panel: #E8F1F8;
  --border: #DCE8F2;
  --text: #22344A;
  --text-secondary: #5F7085;
  --text-gray: #A7B6CB;
  --radius-lg: 14px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow: 0 12px 28px -12px rgba(23, 90, 135, 0.18);
  --shadow-sm: 0 6px 16px -8px rgba(23, 90, 135, 0.12);
  --shadow-hover: 0 18px 36px -14px rgba(23, 90, 135, 0.25);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: Menlo, Consolas, "Roboto Mono", monospace;
  --space-section: clamp(64px, 8vw, 112px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary-dark); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 导航栏 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 10px rgba(23,90,135,.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}
.logo span {
  color: var(--primary);
  font-weight: 600;
  font-size: 18px;
}
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 4px;
  position: relative;
  transition: color .2s;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .25s;
  border-radius: 2px;
}
.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--primary-dark);
}
.nav-cta {
  padding: 10px 24px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  background: var(--primary);
  color: #fff;
  border: none;
  transition: all .2s;
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(77,159,216,.35);
}
.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--primary-dark);
  padding: 8px;
  border-radius: 8px;
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  height: 100vh;
  background: #fff;
  z-index: 200;
  padding: 28px 24px;
  box-shadow: -8px 0 30px rgba(23,90,135,.15);
  flex-direction: column;
  gap: 20px;
}
.mobile-menu.open { display: flex; }
.mobile-menu .mobile-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 16px;
}
.mobile-menu a {
  font-size: 16px;
  color: var(--text);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.mobile-menu a.active { color: var(--primary); font-weight: 600; }
.mobile-menu-close {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text-secondary);
  align-self: flex-end;
  padding: 6px 10px;
}
.menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(23,90,135,.45);
  z-index: 150;
}
.menu-overlay.show { display: block; }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: var(--panel);
  padding: 72px 0 var(--space-section);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 400px;
  height: 400px;
  background: rgba(77,159,216,.12);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 260px;
  height: 260px;
  background: rgba(89,193,189,.1);
  border-radius: 50%;
}
.hero .grid-x { align-items: center; position: relative; z-index: 1; }
.hero-content { padding-right: 40px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--warm);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(32px, 5.5vw, 52px);
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 460px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: all .2s;
  cursor: pointer;
  min-height: 44px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(77,159,216,.4);
}
.btn-outline {
  background: #fff;
  color: var(--primary-dark);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.hero-figure {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 10px;
  border: 1px solid var(--border);
}
.hero-figure img {
  border-radius: calc(var(--radius-lg) - 4px);
  width: 100%;
  height: auto;
  aspect-ratio: 16/10;
  object-fit: cover;
}
.hero-figure-caption {
  padding: 10px 8px 6px;
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
}

/* ===== 倒计时 ===== */
.countdown-section {
  padding-top: calc(var(--space-section) * -0.4);
  position: relative;
  z-index: 5;
}
.countdown-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 40px 32px;
  text-align: center;
}
.countdown-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}
.countdown-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 600px;
  margin: 0 auto;
}
.cd-item {
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 20px 10px;
  border: 1px solid var(--border);
}
.cd-item .cd-num {
  font-family: var(--font-mono);
  font-size: clamp(36px, 5vw, 48px);
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1;
  display: block;
}
.cd-item .cd-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 8px;
  display: block;
}

/* ===== 看点列表 ===== */
.highlights-section {
  padding: var(--space-section) 0;
}
.section-header {
  margin-bottom: 40px;
}
.section-header h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 15px;
}
.highlight-grid { display: flex; gap: 24px; flex-wrap: wrap; }
.highlight-main {
  flex: 0 0 calc(66.666% - 12px);
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all .2s;
}
.highlight-main:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.highlight-main .hl-img {
  border-radius: var(--radius-sm);
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  margin-bottom: 20px;
}
.highlight-side {
  flex: 0 0 calc(33.333% - 12px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.highlight-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  transition: all .2s;
  flex: 1;
}
.highlight-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.hl-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 14px;
}
.highlight-main .hl-badge {
  width: 40px;
  height: 40px;
  font-size: 15px;
}
.hl-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
}
.hl-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== 提醒订阅 ===== */
.subscribe-section {
  background: var(--primary-dark);
  padding: var(--space-section) 0;
  position: relative;
  overflow: hidden;
}
.subscribe-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -40px;
  width: 220px;
  height: 220px;
  background: rgba(255,255,255,.06);
  border-radius: 50%;
}
.subscribe-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}
.subscribe-inner h2 {
  color: #fff;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  margin-bottom: 10px;
}
.subscribe-inner p {
  color: rgba(255,255,255,.85);
  font-size: 15px;
  margin-bottom: 30px;
}
.subscribe-form {
  display: flex;
  gap: 12px;
  max-width: 520px;
  margin: 0 auto 16px;
}
.subscribe-form input {
  flex: 1;
  padding: 13px 22px;
  border-radius: var(--radius-pill);
  border: none;
  font-size: 15px;
  font-family: var(--font-sans);
  outline: none;
  min-height: 48px;
  transition: box-shadow .2s;
}
.subscribe-form input:focus {
  box-shadow: 0 0 0 2px var(--accent);
}
.subscribe-form .btn-subscribe {
  background: var(--warm);
  color: #fff;
  border: none;
  border-radius: var(--radius-pill);
  padding: 13px 30px;
  font-size: 15px;
  font-weight: 600;
  min-height: 48px;
  transition: all .2s;
  white-space: nowrap;
}
.subscribe-form .btn-subscribe:hover {
  background: #e8893f;
  transform: translateY(-1px);
}
.subscribe-form .btn-subscribe.done {
  background: #59C1BD;
}
.privacy-note {
  color: rgba(255,255,255,.6);
  font-size: 12px;
}

/* ===== 回放/直播入口 ===== */
.replay-section {
  padding: var(--space-section) 0;
}
.replay-grid { display: flex; gap: 24px; flex-wrap: wrap; }
.replay-card {
  flex: 1 1 calc(50% - 12px);
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all .2s;
}
.replay-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.replay-card .rc-thumb {
  position: relative;
  overflow: hidden;
}
.replay-card .rc-thumb img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.rc-duration {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: rgba(0,0,0,.7);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}
.replay-card .rc-body {
  padding: 24px;
}
.rc-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.rc-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}
.rc-play-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  transition: all .2s;
}
.rc-play-btn:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
}
.channel-list {
  margin-bottom: 18px;
}
.channel-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.channel-list li:last-child { border-bottom: none; }
.channel-list i {
  color: var(--accent);
  font-size: 16px;
  width: 20px;
  text-align: center;
}
.channel-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ===== 最新资讯 ===== */
.news-section {
  padding: var(--space-section) 0;
  background: var(--bg);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-list-card {
  display: flex;
  gap: 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s;
  align-items: flex-start;
}
.news-list-card:hover {
  box-shadow: var(--shadow-hover);
}
.news-thumb {
  flex-shrink: 0;
  width: 120px;
  height: 90px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-info {
  flex: 1;
  min-width: 0;
}
.news-cat {
  display: inline-block;
  background: var(--panel);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 6px;
}
.news-info h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
}
.news-info h3 a {
  color: var(--text);
}
.news-info h3 a:hover {
  color: var(--primary);
}
.news-info p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-time {
  font-size: 12px;
  color: var(--text-gray);
  font-family: var(--font-mono);
}
.empty-list {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 20px;
  text-align: center;
  color: var(--text-gray);
  font-size: 15px;
  background: var(--card);
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
}
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow .2s;
}
.faq-item:hover {
  box-shadow: var(--shadow-hover);
}
.faq-item.open { border-color: var(--primary); }
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  min-height: 48px;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: color .2s;
}
.faq-q:hover { color: var(--primary-dark); }
.faq-q .faq-icon {
  color: var(--primary);
  font-size: 14px;
  transition: transform .25s;
  flex-shrink: 0;
  margin-left: 12px;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
}
.faq-a {
  display: none;
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--panel);
  padding: var(--space-section) 0;
  text-align: center;
}
.cta-section h2 {
  font-size: clamp(24px, 3vw, 32px);
  color: var(--primary-dark);
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-section p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 28px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,.8);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: 12px;
}
.footer-brand .logo span { color: var(--accent); }
.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.7);
  margin-top: 12px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: rgba(255,255,255,.7);
  font-size: 14px;
  transition: color .2s;
}
.footer-col ul li a:hover {
  color: #fff;
}
.footer-col .contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.7);
  margin-bottom: 12px;
}
.footer-col .contact-item i {
  color: var(--accent);
  width: 18px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.15);
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.5);
}

/* ===== 响应式 ===== */
@media screen and (max-width: 1024px) {
  .main-nav ul { gap: 20px; }
  .highlight-main {
    flex: 0 0 100%;
  }
  .highlight-side {
    flex: 0 0 100%;
    flex-direction: row;
  }
  .highlight-card { flex: 1; }
}

@media screen and (max-width: 768px) {
  .main-nav, .nav-cta { display: none; }
  .hamburger { display: block; }
  .hero-content { padding-right: 0; margin-bottom: 32px; }
  .hero { padding: 48px 0 80px; }
  .countdown-grid { gap: 12px; }
  .cd-item { padding: 16px 8px; }
  .subscribe-form { flex-direction: column; }
  .subscribe-form .btn-subscribe { width: 100%; }
  .replay-grid { flex-direction: column; }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .news-list-card { flex-direction: column; }
  .news-thumb { width: 100%; height: auto; aspect-ratio: 16/9; }
  .highlight-side { flex-direction: column; }
}

@media screen and (max-width: 640px) {
  .container { padding: 0 18px; }
  .header-inner { height: 64px; }
  .logo { font-size: 19px; }
  .logo span { font-size: 16px; }
  .countdown-grid { gap: 8px; }
  .cd-item .cd-num { font-size: 30px; }
  .cd-item .cd-label { font-size: 12px; }
  .subscribe-form input {
    width: 100%;
    border-radius: var(--radius-pill);
  }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { font-size: 12px; }
}

@media screen and (max-width: 360px) {
  .countdown-grid { gap: 6px; }
  .cd-item { padding: 12px 6px; }
  .cd-item .cd-num { font-size: 26px; }
}

/* roulang page: article */
:root{
  --primary:#4D9FD8;
  --primary-dark:#175A87;
  --secondary:#59C1BD;
  --accent:#FF9F5A;
  --bg:#F2F6FA;
  --surface:#FFFFFF;
  --panel:#E8F1F8;
  --border:#DCE8F2;
  --text:#22344A;
  --text-secondary:#5F7085;
  --text-muted:#A7B6CB;
  --radius-lg:14px;
  --radius-sm:8px;
  --radius-pill:999px;
  --shadow-card:0 12px 28px -12px rgba(23,90,135,0.18);
  --shadow-hover:0 18px 36px -14px rgba(23,90,135,0.25);
  --transition:0.2s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
ul,ol{list-style:none;}
input,button,textarea{font-family:inherit;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 12px rgba(23,90,135,.06);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;
}
.logo{
  font-size:24px;font-weight:700;color:var(--primary-dark);
  display:flex;align-items:baseline;line-height:1.2;
}
.logo span{font-size:14px;color:var(--primary);margin-left:6px;font-weight:400;letter-spacing:.5px;}
.main-nav ul{display:flex;align-items:center;gap:4px;}
.main-nav ul li{margin:0;}
.main-nav a{
  display:inline-block;padding:10px 20px;border-radius:var(--radius-pill);
  font-size:15px;color:var(--text-secondary);font-weight:500;line-height:1.4;
}
.main-nav a:hover{color:var(--primary-dark);background:rgba(77,159,216,.08);}
.main-nav a.active{color:#fff;background:var(--primary);box-shadow:0 4px 12px rgba(77,159,216,.28);}
.header-actions{display:flex;align-items:center;gap:12px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-pill);font-weight:600;
  transition:var(--transition);cursor:pointer;border:none;
  text-align:center;line-height:1.4;
}
.btn:focus-visible{outline:3px solid rgba(89,193,189,.5);outline-offset:2px;}
.btn-primary{
  background:var(--primary);color:#fff;padding:10px 24px;font-size:14px;
}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 6px 16px rgba(23,90,135,.25);}
.btn-primary:active{transform:translateY(0);box-shadow:0 3px 8px rgba(23,90,135,.2);}
.btn-outline{
  background:transparent;border:1.5px solid var(--primary);color:var(--primary);
  padding:10px 24px;font-size:14px;
}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-1px);box-shadow:0 6px 16px rgba(23,90,135,.2);}
.btn-outline:active{transform:translateY(0);}
.nav-toggle{
  display:none;background:none;border:none;width:44px;height:44px;
  cursor:pointer;border-radius:var(--radius-sm);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--primary-dark);border-radius:2px;transition:all .3s ease;}
.nav-toggle:hover span{background:var(--primary);}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.nav-overlay{
  display:none;position:fixed;top:0;left:0;right:0;bottom:0;
  background:rgba(17,45,67,.45);z-index:98;
}
.nav-overlay.show{display:block;}
.article-hero{
  background:linear-gradient(180deg,rgba(232,241,248,.92),rgba(242,246,250,.98));
  padding:64px 0 48px;position:relative;overflow:hidden;
}
.article-hero::before{
  content:'';position:absolute;top:-30%;right:-10%;width:520px;height:520px;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.1;transform:rotate(-8deg);border-radius:30%;
}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:14px;color:var(--text-muted);margin-bottom:28px;position:relative;z-index:1;
}
.breadcrumb a{color:var(--text-secondary);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-muted);}
.breadcrumb .current{
  color:var(--text);font-weight:500;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap;max-width:340px;
}
.article-head{
  background:var(--surface);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);border:1px solid var(--border);
  padding:40px 44px;position:relative;z-index:1;
}
.article-category{
  display:inline-block;background:var(--secondary);color:#fff;
  padding:5px 16px;border-radius:var(--radius-pill);
  font-size:13px;font-weight:600;margin-bottom:18px;letter-spacing:.6px;
}
.article-title{
  font-size:clamp(26px,4vw,38px);line-height:1.25;font-weight:700;
  color:var(--text);margin-bottom:18px;
}
.article-meta{
  display:flex;flex-wrap:wrap;gap:12px 24px;
  color:var(--text-secondary);font-size:14px;margin-bottom:22px;
}
.meta-item{display:inline-flex;align-items:center;gap:6px;}
.meta-item i{color:var(--primary);font-size:15px;}
.article-summary{
  background:var(--panel);border-radius:var(--radius-sm);
  padding:16px 20px;border-left:4px solid var(--primary);
  font-size:15px;color:var(--text-secondary);line-height:1.7;
}
.article-main{padding:56px 0;}
.article-col{padding-bottom:0;}
.article-content{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:48px;
  box-shadow:var(--shadow-card);
  font-size:16px;line-height:1.75;color:var(--text);
}
.article-content p{margin-bottom:24px;}
.article-content h2{
  font-size:26px;font-weight:700;color:var(--primary-dark);
  margin-top:40px;margin-bottom:18px;padding-top:8px;
}
.article-content h3{
  font-size:20px;font-weight:600;color:var(--text);
  margin-top:40px;margin-bottom:14px;
}
.article-content h4{
  font-size:17px;font-weight:600;color:var(--text);
  margin-top:28px;margin-bottom:12px;
}
.article-content img{
  border-radius:var(--radius-lg);box-shadow:0 12px 28px -12px rgba(23,90,135,.2);
  margin:28px 0;width:100%;height:auto;object-fit:cover;
}
.article-content figure{margin:28px 0;}
.article-content figcaption{
  text-align:center;font-size:13px;color:var(--text-muted);
  margin-top:8px;
}
.article-content blockquote{
  border-left:4px solid var(--primary);background:var(--panel);
  padding:18px 22px;margin:28px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--text-secondary);font-size:15px;
}
.article-content blockquote p{margin-bottom:0;}
.article-content ul,.article-content ol{
  padding-left:24px;margin-bottom:24px;
}
.article-content ul{list-style:disc;}
.article-content ol{list-style:decimal;}
.article-content li{margin-bottom:8px;}
.article-content li::marker{color:var(--primary);}
.article-content a{
  color:var(--primary-dark);border-bottom:1px solid rgba(77,159,216,.4);
}
.article-content a:hover{border-bottom-color:var(--primary-dark);}
.article-content table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:14px;
}
.article-content th{
  background:var(--panel);color:var(--primary-dark);
  padding:12px 16px;text-align:left;font-weight:600;border:1px solid var(--border);
}
.article-content td{background:#fff;padding:10px 16px;border:1px solid var(--border);}
.not-found-box{
  text-align:center;padding:56px 24px;
}
.not-found-box i{font-size:52px;color:var(--text-muted);margin-bottom:18px;display:block;}
.not-found-box h2{font-size:24px;font-weight:700;color:var(--text);margin-bottom:10px;}
.not-found-box p{color:var(--text-secondary);margin-bottom:28px;font-size:15px;}
.article-tags{
  display:flex;gap:8px;margin-top:32px;flex-wrap:wrap;
  padding-top:24px;border-top:1px solid var(--border);
}
.tag{
  background:var(--panel);color:var(--primary-dark);
  padding:5px 14px;border-radius:var(--radius-pill);
  font-size:13px;font-weight:500;transition:var(--transition);
}
.tag:hover{background:var(--primary);color:#fff;}
.article-back{margin-top:32px;text-align:center;}
.related-section{padding:72px 0;background:var(--bg);border-top:1px solid var(--border);}
.section-head{text-align:center;margin-bottom:44px;}
.section-head h2{
  font-size:clamp(24px,3vw,32px);font-weight:700;color:var(--text);
  margin-bottom:6px;
}
.section-head p{color:var(--text-secondary);font-size:15px;margin-top:4px;}
.related-cell{margin-bottom:26px;}
.related-card{
  display:flex;flex-direction:column;background:var(--surface);
  border-radius:var(--radius-lg);border:1px solid var(--border);overflow:hidden;
  box-shadow:var(--shadow-card);transition:var(--transition);height:100%;
}
.related-card:hover{
  transform:translateY(-4px);box-shadow:var(--shadow-hover);
}
.related-img{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  background:var(--panel);
}
.related-img::before{
  content:attr(data-fallback);
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:700;color:var(--primary);opacity:0;z-index:0;
}
.related-img img{
  width:100%;height:100%;object-fit:cover;transition:transform .35s ease;
  position:relative;z-index:1;
}
.related-card:hover .related-img img{transform:scale(1.05);}
.related-img .tag{
  position:absolute;top:12px;left:12px;z-index:2;
  background:rgba(23,90,135,.85);color:#fff;backdrop-filter:blur(4px);
}
.related-body{padding:20px 24px;display:flex;flex-direction:column;flex:1;}
.related-body h3{
  font-size:18px;font-weight:600;line-height:1.45;color:var(--text);
  margin-bottom:8px;transition:var(--transition);
}
.related-card:hover .related-body h3{color:var(--primary-dark);}
.related-body p{
  font-size:14px;color:var(--text-secondary);margin-bottom:14px;
  flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;line-height:1.6;
}
.related-meta{
  font-size:13px;color:var(--text-muted);
  display:flex;justify-content:space-between;align-items:center;
}
.related-meta .week-view i{margin-right:4px;}
.cta-section{
  background:var(--primary-dark);padding:72px 0;position:relative;overflow:hidden;
}
.cta-section::before{
  content:'';position:absolute;top:-50%;right:-15%;width:420px;height:420px;
  border-radius:50%;background:rgba(255,255,255,.05);
}
.cta-section::after{
  content:'';position:absolute;bottom:-40%;left:-10%;width:300px;height:300px;
  border-radius:50%;background:rgba(77,159,216,.18);
}
.cta-inner{text-align:center;max-width:640px;margin:0 auto;position:relative;z-index:1;}
.cta-inner h2{color:#fff;font-size:clamp(24px,3vw,30px);font-weight:700;margin-bottom:10px;}
.cta-inner p{color:rgba(255,255,255,.85);font-size:15px;margin-bottom:26px;}
.cta-form{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;}
.cta-form input[type="email"]{
  border-radius:var(--radius-pill);border:none;padding:13px 22px;
  font-size:14px;width:280px;background:#fff;color:var(--text);
  box-shadow:0 4px 12px rgba(0,0,0,.1);outline:none;transition:var(--transition);
}
.cta-form input[type="email"]:focus{
  box-shadow:0 0 0 3px rgba(89,193,189,.5);
}
.cta-form input[type="email"]::placeholder{color:var(--text-muted);}
.btn-accent{
  background:var(--accent);color:#fff;padding:13px 30px;border-radius:var(--radius-pill);
  font-weight:600;border:none;cursor:pointer;font-size:14px;
  transition:var(--transition);display:inline-flex;align-items:center;gap:8px;
}
.btn-accent:hover{background:#e88735;transform:translateY(-1px);box-shadow:0 8px 20px rgba(255,159,90,.35);}
.btn-accent:active{transform:translateY(0);box-shadow:0 4px 10px rgba(255,159,90,.25);}
.btn-accent.subscribed{background:#2BA84A;}
.btn-accent.subscribed:hover{background:#239239;}
.cta-privacy{margin-top:14px;font-size:12px;color:rgba(255,255,255,.6);}
.site-footer{background:var(--surface);border-top:1px solid var(--border);padding:56px 0 24px;}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:36px;
}
.footer-brand .logo{margin-bottom:12px;}
.footer-desc{font-size:14px;color:var(--text-secondary);line-height:1.65;margin-top:8px;}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text);margin-bottom:16px;position:relative;padding-bottom:10px;}
.footer-col h4::after{content:'';position:absolute;left:0;bottom:0;width:28px;height:3px;border-radius:2px;background:var(--primary);}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{color:var(--text-secondary);font-size:14px;transition:var(--transition);}
.footer-col ul a:hover{color:var(--primary);padding-left:4px;}
.contact-item{
  display:flex;align-items:center;gap:10px;color:var(--text-secondary);
  font-size:14px;margin-bottom:10px;
}
.contact-item i{color:var(--primary);width:16px;text-align:center;}
.footer-bottom{
  border-top:1px solid var(--panel);padding-top:20px;
  text-align:center;font-size:13px;color:var(--text-muted);
}
@media(max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr 1fr;}
  .article-content{padding:36px;}
  .article-head{padding:32px;}
}
@media(max-width:767px){
  .header-inner{height:60px;}
  .main-nav{
    position:fixed;top:0;right:-300px;width:280px;height:100vh;
    background:var(--surface);padding:76px 24px 24px;
    transition:right .3s ease;box-shadow:-8px 0 24px rgba(17,45,67,.12);
    z-index:99;
  }
  .main-nav.open{right:0;}
  .main-nav ul{flex-direction:column;gap:4px;}
  .main-nav a{display:block;padding:13px 16px;border-radius:var(--radius-sm);}
  .header-cta{display:none;}
  .nav-toggle{display:flex;}
  .article-hero{padding:40px 0 32px;}
  .article-head{padding:24px;}
  .article-title{font-size:24px;line-height:1.3;}
  .article-meta{gap:8px 16px;font-size:13px;}
  .article-summary{padding:14px 16px;font-size:14px;}
  .article-main{padding:40px 0;}
  .article-content{padding:24px;font-size:15px;}
  .article-content p{margin-bottom:20px;}
  .article-content h2{font-size:22px;margin-top:32px;}
  .article-content h3{font-size:18px;margin-top:32px;}
  .article-content img{border-radius:var(--radius-sm);margin:20px 0;}
  .article-content blockquote{font-size:14px;padding:14px 16px;}
  .related-section{padding:56px 0;}
  .cta-section{padding:56px 0;}
  .cta-form input[type="email"]{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .breadcrumb .current{max-width:180px;}
}
@media(max-width:520px){
  .container{padding:0 16px;}
  .article-head{padding:20px;}
  .article-title{font-size:21px;}
  .article-content{padding:18px 16px;}
  .article-content h2{font-size:20px;}
  .article-content h3{font-size:17px;}
  .article-content h4{font-size:16px;}
  .article-summary{font-size:13px;}
  .article-meta{gap:6px 12px;font-size:12px;}
  .meta-item i{font-size:13px;}
}

/* roulang page: category1 */
:root {
      --primary: #4D9FD8;
      --primary-dark: #175A87;
      --secondary: #59C1BD;
      --accent: #FF9F5A;
      --bg: #F2F6FA;
      --surface: #FFFFFF;
      --panel: #E8F1F8;
      --border: #DCE8F2;
      --text: #22344A;
      --text-secondary: #5F7085;
      --muted: #A7B6CB;
      --radius-lg: 14px;
      --radius-sm: 8px;
      --shadow: 0 12px 28px -12px rgba(23, 90, 135, 0.18);
      --shadow-sm: 0 6px 16px -8px rgba(23, 90, 135, 0.12);
      --shadow-hover: 0 18px 36px -14px rgba(23, 90, 135, 0.25);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-mono: Menlo, Consolas, "Roboto Mono", monospace;
      --transition: all 0.2s ease;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }

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

    img { max-width: 100%; display: block; }
    ul { list-style: none; padding: 0; margin: 0; }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-dark); }
    button, input { font-family: inherit; }

    .grid-container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }

    /* ===== Header / Nav ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 2px 12px rgba(23, 90, 135, 0.04);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--text);
      white-space: nowrap;
      display: inline-flex;
      align-items: baseline;
      gap: 4px;
    }
    .logo span { font-size: 14px; font-weight: 500; color: var(--primary); }

    .main-nav { display: flex; align-items: center; gap: 8px; }

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

    .main-nav ul li a {
      display: inline-flex;
      align-items: center;
      padding: 10px 18px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
      background: transparent;
      border: 1px solid transparent;
    }

    .main-nav ul li a:hover {
      background: var(--panel);
      color: var(--primary-dark);
    }

    .main-nav ul li a.active {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 6px 16px -6px rgba(77, 159, 216, 0.55);
    }

    .header-cta {
      margin-left: 12px;
      flex-shrink: 0;
    }

    .nav-cta-mobile { display: none; }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--border);
      border-radius: 999px;
      background: var(--surface);
      color: var(--primary-dark);
      font-size: 18px;
      cursor: pointer;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }
    .menu-toggle:hover { background: var(--panel); }

    @media (max-width: 768px) {
      .header-inner { height: 64px; }
      .menu-toggle { display: inline-flex; }
      .header-cta { display: none; }

      .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 24px 40px -20px rgba(23, 90, 135, 0.3);
        padding: 16px 20px 24px;
        transform: translateY(-130%);
        transition: transform 0.28s ease;
        flex-direction: column;
        align-items: stretch;
        z-index: 99;
      }

      .main-nav.open { transform: translateY(0); }
      .main-nav ul { flex-direction: column; align-items: stretch; gap: 4px; }
      .main-nav ul li a { width: 100%; justify-content: center; padding: 14px; font-size: 16px; }
      .nav-cta-mobile { display: flex; margin-top: 14px; justify-content: center; }
      body.nav-open { overflow: hidden; }
    }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      line-height: 1.3;
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      white-space: nowrap;
    }

    .btn:focus-visible {
      outline: 2px solid var(--secondary);
      outline-offset: 2px;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
    }
    .btn-primary:hover, .btn-primary:active {
      background: var(--primary-dark);
      color: #fff;
      transform: translateY(-1px);
      box-shadow: 0 8px 20px -8px rgba(23, 90, 135, 0.5);
    }

    .btn-outline {
      background: var(--surface);
      color: var(--primary-dark);
      border-color: var(--primary);
    }
    .btn-outline:hover, .btn-outline:active {
      background: var(--primary);
      color: #fff;
      transform: translateY(-1px);
    }

    .btn-sm {
      padding: 8px 16px;
      font-size: 13px;
    }

    .btn-ghost {
      background: var(--panel);
      color: var(--primary-dark);
      border-color: transparent;
    }
    .btn-ghost:hover {
      background: var(--primary);
      color: #fff;
    }

    /* ===== Section common ===== */
    .section { padding: clamp(64px, 8vw, 112px) 0; }

    .section-head {
      margin-bottom: 42px;
      text-align: center;
    }
    .section-head h2 {
      font-size: clamp(24px, 3vw, 34px);
      font-weight: 700;
      color: var(--text);
      line-height: 1.3;
      margin: 0 0 10px;
    }
    .section-head p {
      color: var(--text-secondary);
      font-size: 16px;
      margin: 0;
    }

    /* ===== Hero ===== */
    .page-hero {
      background-color: var(--panel);
      background-image:
        radial-gradient(circle at 18% 22%, rgba(77, 159, 216, 0.2) 0%, transparent 32%),
        radial-gradient(circle at 82% 74%, rgba(89, 193, 189, 0.18) 0%, transparent 36%);
      padding: clamp(56px, 7vw, 96px) 0;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--surface);
      border: 1px solid var(--primary);
      color: var(--primary-dark);
      border-radius: 999px;
      padding: 6px 16px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .page-hero h1 {
      font-size: clamp(32px, 5.5vw, 52px);
      font-weight: 700;
      line-height: 1.2;
      color: var(--text);
      margin: 0 0 14px;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-secondary);
      max-width: 460px;
      margin: 0 0 28px;
    }

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

    .hero-figure {
      background: var(--surface);
      border-radius: var(--radius-lg);
      padding: 10px;
      box-shadow: var(--shadow);
    }

    .hero-figure img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      border-radius: 10px;
      background: var(--panel);
    }

    /* ===== Guide list ===== */
    .guide-card {
      display: flex;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
      transition: var(--transition);
    }

    .guide-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }

    .guide-card-media {
      width: 300px;
      min-height: 200px;
      flex-shrink: 0;
      background: var(--panel);
    }

    .guide-card-media img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      background: var(--panel);
    }

    .guide-card-body {
      flex: 1;
      padding: 26px 28px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .guide-card-body h3 {
      font-size: 19px;
      font-weight: 600;
      line-height: 1.45;
      margin: 10px 0 8px;
    }

    .guide-card-body h3 a { color: var(--text); }
    .guide-card-body h3 a:hover { color: var(--primary-dark); }

    .guide-card-excerpt {
      font-size: 15px;
      color: var(--text-secondary);
      margin: 0 0 14px;
    }

    .guide-card-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 13px;
      color: var(--muted);
    }

    .guide-card-meta i { margin-right: 4px; }

    .guide-card-meta .btn { margin-left: auto; }

    @media (max-width: 640px) {
      .guide-card { flex-direction: column; }
      .guide-card-media { width: 100%; }
      .guide-card-media img { height: 200px; }
      .guide-card-meta { gap: 10px; }
      .guide-card-meta .btn { margin-left: 0; }
    }

    /* ===== Tags chips ===== */
    .tag { display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: 13px; font-weight: 500; }
    .tag-blue { background: var(--panel); color: var(--primary-dark); }
    .tag-green { background: #E1F4F3; color: #2C8F8A; }
    .tag-orange { background: #FFF0E4; color: #C96A2E; }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
    }

    .tag-chip {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 10px 22px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 999px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text);
      transition: var(--transition);
    }

    .tag-chip:hover {
      border-color: var(--primary);
      color: var(--primary-dark);
      background: var(--panel);
      transform: translateY(-1px);
    }

    /* ===== Steps ===== */
    .steps-section { background: var(--panel); }

    .step-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 30px 24px;
      height: 100%;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .step-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow);
    }

    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-family: var(--font-mono);
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .step-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin: 0 0 8px;
      color: var(--text);
    }

    .step-card p {
      font-size: 14px;
      color: var(--text-secondary);
      margin: 0;
    }

    /* ===== FAQ ===== */
    .faq-section { background: var(--surface); }

    .container.narrow { max-width: 860px; }

    .faq-item {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 12px;
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      padding: 16px 20px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      background: none;
      border: none;
      cursor: pointer;
      text-align: left;
      min-height: 48px;
      transition: var(--transition);
    }

    .faq-question::after {
      content: '\f078';
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      color: var(--primary);
      font-size: 14px;
      transition: transform 0.25s ease;
      flex-shrink: 0;
      margin-left: 12px;
    }

    .faq-item.active .faq-question::after { transform: rotate(180deg); }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease;
      padding: 0 20px;
    }

    .faq-item.active .faq-answer {
      max-height: 320px;
      padding-bottom: 18px;
    }

    .faq-answer p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin: 0;
    }

    /* ===== More ===== */
    .more-section { background: var(--primary-dark); }

    .more-section .section-head h2 { color: #fff; }
    .more-section .section-head p { color: rgba(255, 255, 255, 0.75); }

    .more-card {
      background: var(--surface);
      border-radius: var(--radius-lg);
      padding: 32px;
      height: 100%;
      box-shadow: var(--shadow);
      transition: var(--transition);
    }

    .more-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }

    .more-card h3 { font-size: 20px; font-weight: 600; color: var(--text); margin: 0 0 8px; }
    .more-card p { font-size: 15px; color: var(--text-secondary); margin: 0 0 22px; }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--surface);
      border-top: 1px solid var(--border);
      padding: 64px 0 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 48px;
    }

    .footer-brand .logo { margin-bottom: 14px; }

    .footer-desc {
      font-size: 14px;
      color: var(--text-secondary);
      max-width: 320px;
      margin: 12px 0 0;
      line-height: 1.75;
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      margin: 0 0 16px;
    }

    .footer-col ul li { margin-bottom: 10px; }

    .footer-col ul li a {
      font-size: 14px;
      color: var(--text-secondary);
    }

    .footer-col ul li a:hover { color: var(--primary-dark); }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 10px;
    }

    .contact-item i { color: var(--primary); width: 18px; text-align: center; }

    .footer-bottom {
      border-top: 1px solid var(--border);
      padding: 20px 0;
      font-size: 14px;
      color: var(--muted);
      text-align: center;
    }

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

    @media (max-width: 640px) {
      .footer-grid { grid-template-columns: 1fr; }
    }

    /* ===== Motion & focus ===== */
    .btn:active, .tag-chip:active, .faq-question:active, .menu-toggle:active {
      transform: scale(0.98);
    }

    a:focus-visible {
      outline: 2px solid var(--secondary);
      outline-offset: 2px;
      border-radius: 4px;
    }

/* roulang page: category3 */
:root {
      --primary: #4D9FD8;
      --primary-dark: #175A87;
      --secondary: #59C1BD;
      --accent: #FF9F5A;
      --bg: #F2F6FA;
      --surface: #FFFFFF;
      --panel: #E8F1F8;
      --border: #DCE8F2;
      --text: #22344A;
      --text-secondary: #5F7085;
      --text-muted: #A7B6CB;
      --radius-lg: 14px;
      --radius-md: 8px;
      --radius-pill: 999px;
      --shadow-card: 0 12px 28px -12px rgba(23, 90, 135, 0.18);
      --shadow-hover: 0 18px 36px -14px rgba(23, 90, 135, 0.25);
      --ease: 0.25s cubic-bezier(0.25, 0.6, 0.35, 1);
      --font-mono: Menlo, Consolas, 'Roboto Mono', monospace;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 92px;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--text);
      background: var(--bg);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
      outline: 2px solid var(--secondary);
      outline-offset: 2px;
    }

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

    ul,
    ol {
      list-style: none;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .section-pad {
      padding: clamp(64px, 8vw, 112px) 0;
    }

    .section-title {
      font-size: clamp(24px, 3vw, 34px);
      font-weight: 700;
      line-height: 1.3;
      color: var(--text);
      margin-bottom: 12px;
    }

    .section-sub {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 640px;
      line-height: 1.75;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 5px 14px;
      border-radius: var(--radius-pill);
      background: var(--panel);
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 600;
      line-height: 1.6;
      transition: all var(--ease);
    }

    .tag-green {
      background: rgba(89, 193, 189, 0.14);
      color: #17756f;
    }

    .tag-orange {
      background: rgba(255, 159, 90, 0.14);
      color: #b65a1a;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 600;
      border: 1px solid transparent;
      padding: 12px 30px;
      min-height: 44px;
      line-height: 1;
      cursor: pointer;
      transition: all var(--ease);
      white-space: nowrap;
    }

    .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 20px -8px rgba(23, 90, 135, 0.5);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: none;
    }

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

    .btn-outline:hover {
      background: var(--panel);
      border-color: var(--primary-dark);
      color: var(--primary-dark);
      transform: translateY(-2px);
    }

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

    .btn-accent {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
    }

    .btn-accent:hover {
      background: #e8833d;
      border-color: #e8833d;
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px -8px rgba(255, 159, 90, 0.55);
    }

    .btn-accent:active {
      transform: translateY(0);
      box-shadow: none;
    }

    /* ===== Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 4px 20px -16px rgba(23, 90, 135, 0.18);
    }

    .site-header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 24px;
    }

    .logo {
      font-size: 21px;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.3px;
      white-space: nowrap;
      display: inline-flex;
      align-items: baseline;
      gap: 4px;
    }

    .logo span {
      font-size: 14px;
      font-weight: 500;
      color: var(--primary);
    }

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

    .main-nav a {
      display: inline-block;
      padding: 10px 18px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      position: relative;
      transition: all var(--ease);
    }

    .main-nav a:hover {
      color: var(--primary-dark);
      background: var(--panel);
    }

    .main-nav a.active {
      color: #fff;
      background: var(--primary);
      font-weight: 600;
    }

    .main-nav a.active:hover {
      color: #fff;
      background: var(--primary-dark);
    }

    .nav-cta {
      margin-left: 6px;
    }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--border);
      background: var(--surface);
      border-radius: 10px;
      font-size: 18px;
      color: var(--primary-dark);
      cursor: pointer;
      align-items: center;
      justify-content: center;
      transition: all var(--ease);
    }

    .nav-toggle:hover {
      background: var(--panel);
      border-color: var(--primary);
    }

    /* ===== Page Hero ===== */
    .page-hero {
      background: linear-gradient(135deg, #E8F1F8 0%, #F2F6FA 100%);
      padding: clamp(56px, 7vw, 96px) 0 clamp(40px, 5vw, 64px);
      position: relative;
      overflow: hidden;
    }

    .page-hero::before {
      content: '';
      position: absolute;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      background: rgba(77, 159, 216, 0.08);
      top: -120px;
      right: -80px;
      pointer-events: none;
    }

    .hero-inner {
      display: flex;
      align-items: center;
      gap: 56px;
      position: relative;
      z-index: 2;
    }

    .hero-text {
      flex: 1.2;
    }

    .hero-media {
      flex: 1;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 18px;
      flex-wrap: wrap;
    }

    .breadcrumb a {
      color: var(--primary-dark);
      font-weight: 500;
    }

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

    .breadcrumb i {
      font-size: 10px;
      color: var(--text-muted);
    }

    .breadcrumb .current {
      color: var(--text-muted);
    }

    .page-hero h1 {
      font-size: clamp(32px, 5.5vw, 52px);
      font-weight: 700;
      line-height: 1.2;
      color: var(--text);
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 17px;
      line-height: 1.75;
      color: var(--text-secondary);
      max-width: 540px;
      margin-bottom: 28px;
    }

    .hero-meta {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      align-items: center;
    }

    .hero-media-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 12px;
      box-shadow: var(--shadow-card);
      transition: box-shadow var(--ease);
    }

    .hero-media-card:hover {
      box-shadow: var(--shadow-hover);
    }

    .hero-media-card img {
      width: 100%;
      height: auto;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      border-radius: 10px;
    }

    .hero-media-caption {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 8px 4px;
      font-size: 13px;
      color: var(--text-secondary);
    }

    .hero-media-caption .status-dot {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary-dark);
      font-weight: 600;
    }

    .status-dot::before {
      content: '';
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--secondary);
      display: inline-block;
      box-shadow: 0 0 0 3px rgba(89, 193, 189, 0.2);
    }

    /* ===== Featured Tiles ===== */
    .topic-section {
      padding: clamp(56px, 7vw, 88px) 0;
    }

    .topic-head {
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
      margin-bottom: 36px;
      gap: 24px;
      flex-wrap: wrap;
    }

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

    .topic-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all var(--ease);
      position: relative;
    }

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

    .topic-card-large {
      grid-column: span 2;
      grid-row: span 2;
    }

    .topic-card-medium {
      grid-column: span 1;
    }

    .topic-card img {
      width: 100%;
      height: auto;
      aspect-ratio: 16 / 9;
      object-fit: cover;
    }

    .topic-card-large img {
      aspect-ratio: 16 / 9;
      height: 100%;
      min-height: 300px;
    }

    .topic-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .topic-body h3 {
      font-size: 20px;
      font-weight: 600;
      line-height: 1.4;
      color: var(--text);
    }

    .topic-card-large .topic-body h3 {
      font-size: 24px;
      font-weight: 700;
    }

    .topic-body p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.65;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .topic-meta {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-top: auto;
      padding-top: 12px;
      border-top: 1px solid var(--border);
      font-size: 13px;
      color: var(--text-muted);
    }

    .topic-meta .tag {
      margin-right: 4px;
    }

    .topic-link {
      margin-top: 4px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
    }

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

    /* ===== Data Panel ===== */
    .stats-section {
      background: var(--surface);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      padding: clamp(48px, 6vw, 72px) 0;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .stat-item {
      padding: 12px 20px;
      border-radius: var(--radius-lg);
      background: var(--panel);
      transition: transform var(--ease), box-shadow var(--ease);
    }

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

    .stat-num {
      font-family: var(--font-mono);
      font-size: 44px;
      font-weight: 700;
      color: var(--primary-dark);
      line-height: 1.2;
      letter-spacing: -2px;
    }

    .stat-num small {
      font-size: 20px;
      font-weight: 600;
      color: var(--primary);
    }

    .stat-label {
      margin-top: 4px;
      font-size: 14px;
      color: var(--text-secondary);
    }

    /* ===== Timeline ===== */
    .timeline-wrap {
      padding: clamp(64px, 8vw, 100px) 0;
    }

    .timeline {
      margin-top: 36px;
      position: relative;
      padding-left: 32px;
      max-width: 760px;
    }

    .timeline::before {
      content: '';
      position: absolute;
      left: 8px;
      top: 8px;
      bottom: 8px;
      width: 2px;
      background: var(--border);
    }

    .timeline-item {
      position: relative;
      padding: 0 0 32px 20px;
    }

    .timeline-item::before {
      content: '';
      position: absolute;
      left: -31px;
      top: 8px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--primary);
      border: 3px solid #fff;
      box-shadow: 0 0 0 2px var(--primary);
    }

    .timeline-item:last-child {
      padding-bottom: 0;
    }

    .timeline-date {
      font-family: var(--font-mono);
      font-size: 14px;
      font-weight: 600;
      color: var(--primary-dark);
      background: var(--panel);
      display: inline-block;
      padding: 3px 14px;
      border-radius: var(--radius-pill);
      margin-bottom: 10px;
    }

    .timeline-item h4 {
      font-size: 17px;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .timeline-item p {
      font-size: 14px;
      color: var(--text-secondary);
      max-width: 580px;
    }

    /* ===== More Links ===== */
    .more-section {
      padding: clamp(48px, 6vw, 80px) 0;
    }

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

    .more-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      padding: 28px;
      display: flex;
      align-items: center;
      gap: 20px;
      transition: all var(--ease);
    }

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

    .more-icon {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      background: var(--panel);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      flex-shrink: 0;
      transition: all var(--ease);
    }

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

    .more-info h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 4px;
    }

    .more-info p {
      font-size: 14px;
      color: var(--text-secondary);
    }

    .more-link {
      margin-left: auto;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: clamp(56px, 7vw, 88px) 0;
      background: var(--surface);
    }

    .faq-accordion {
      margin-top: 36px;
      max-width: 860px;
      margin-left: auto;
      margin-right: auto;
    }

    .faq-item {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      margin-bottom: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: box-shadow var(--ease);
    }

    .faq-item:hover {
      box-shadow: var(--shadow-hover);
    }

    .faq-toggle {
      width: 100%;
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 18px 24px;
      min-height: 56px;
      background: none;
      border: none;
      cursor: pointer;
      text-align: left;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      transition: background var(--ease);
    }

    .faq-toggle:hover {
      background: var(--panel);
    }

    .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--panel);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      color: var(--primary-dark);
      flex-shrink: 0;
      transition: all var(--ease);
    }

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

    .faq-panel {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease;
    }

    .faq-panel-inner {
      padding: 0 24px 22px 66px;
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: clamp(56px, 7vw, 88px) 0;
      background: linear-gradient(120deg, #175A87, #2b77ab);
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .cta-section::after {
      content: '';
      position: absolute;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.06);
      bottom: -120px;
      right: -60px;
    }

    .cta-box {
      text-align: center;
      max-width: 680px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .cta-box h2 {
      font-size: clamp(26px, 3.4vw, 38px);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 14px;
      color: #fff;
    }

    .cta-box p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.85);
      margin-bottom: 28px;
    }

    .cta-subscribe {
      display: flex;
      gap: 10px;
      max-width: 520px;
      margin: 0 auto;
      flex-wrap: wrap;
    }

    .cta-subscribe .form-input {
      flex: 1;
      min-width: 240px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(255, 255, 255, 0.4);
      background: #fff;
      color: var(--text);
      padding: 14px 24px;
      font-size: 14px;
      transition: border var(--ease), box-shadow var(--ease);
    }

    .cta-subscribe .form-input:focus {
      outline: none;
      border-color: var(--secondary);
      box-shadow: 0 0 0 3px rgba(89, 193, 189, 0.3);
    }

    .cta-privacy {
      font-size: 12px;
      color: rgba(255, 255, 255, 0.6);
      margin-top: 16px;
      text-align: center;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--text);
      color: #A7B6CB;
      padding: 64px 0 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 40px;
    }

    .footer-brand .logo {
      color: #fff;
      margin-bottom: 12px;
    }

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

    .footer-desc {
      font-size: 14px;
      line-height: 1.7;
      color: #748aa0;
      max-width: 300px;
      margin-top: 10px;
    }

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

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul a {
      font-size: 14px;
      color: #A7B6CB;
      transition: color var(--ease), padding-left var(--ease);
    }

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

    .contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      margin-bottom: 12px;
      color: #A7B6CB;
    }

    .contact-item i {
      width: 18px;
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 20px 0;
      text-align: center;
      font-size: 13px;
      color: #748aa0;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .topic-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .topic-card-large {
        grid-column: span 2;
        grid-row: span 1;
      }
    }

    @media (max-width: 840px) {
      .hero-inner {
        flex-direction: column-reverse;
        gap: 32px;
      }

      .hero-text,
      .hero-media {
        flex: unset;
        width: 100%;
      }

      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }

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

    @media (max-width: 768px) {
      .nav-toggle {
        display: inline-flex;
      }

      .main-nav {
        position: fixed;
        top: 72px;
        right: 0;
        bottom: 0;
        width: min(320px, 82vw);
        background: var(--surface);
        border-left: 1px solid var(--border);
        box-shadow: -20px 0 40px rgba(0, 0, 0, 0.12);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        padding: 24px;
        z-index: 99;
        overflow-y: auto;
      }

      .main-nav.open {
        transform: translateX(0);
      }

      .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
      }

      .main-nav a {
        display: block;
        padding: 14px 18px;
        text-align: left;
        font-size: 16px;
      }

      .nav-cta {
        display: none;
      }

      .nav-backdrop {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(34, 52, 74, 0.5);
        z-index: 98;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease;
      }

      .nav-backdrop.show {
        opacity: 1;
        visibility: visible;
      }
    }

    @media (max-width: 640px) {
      .container {
        padding: 0 20px;
      }

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

      .topic-card-large {
        grid-column: span 1;
      }

      .topic-card-large .topic-body h3 {
        font-size: 20px;
      }

      .topic-card img {
        aspect-ratio: 16 / 10;
      }

      .topic-card-large img {
        min-height: unset;
      }

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

      .more-card {
        flex-wrap: wrap;
      }

      .more-link {
        width: 100%;
        margin-top: 4px;
      }

      .more-link .btn {
        width: 100%;
      }

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

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

      .cta-subscribe {
        flex-direction: column;
      }

      .cta-subscribe .form-input {
        width: 100%;
      }

      .cta-subscribe .btn {
        width: 100%;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .timeline {
        padding-left: 24px;
      }

      .faq-panel-inner {
        padding-left: 24px;
      }
    }

/* roulang page: category2 */
:root {
      --primary: #4D9FD8;
      --primary-dark: #175A87;
      --accent: #59C1BD;
      --orange: #FF9F5A;
      --bg: #F2F6FA;
      --card: #FFFFFF;
      --panel: #E8F1F8;
      --border: #DCE8F2;
      --text: #22344A;
      --text-secondary: #5F7085;
      --text-muted: #A7B6CB;
      --radius-lg: 14px;
      --radius-sm: 8px;
      --radius-pill: 999px;
      --shadow: 0 12px 28px -12px rgba(23, 90, 135, 0.18);
      --shadow-sm: 0 6px 16px -8px rgba(23, 90, 135, 0.12);
      --shadow-hover: 0 18px 36px -14px rgba(23, 90, 135, 0.25);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-mono: Menlo, Consolas, "Roboto Mono", monospace;
      --space-section: clamp(64px, 8vw, 112px);
    }

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

    html {
      scroll-behavior: smooth;
    }

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

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

    a {
      text-decoration: none;
      color: var(--primary-dark);
      transition: color 0.2s ease;
    }

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

    ul {
      list-style: none;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 600;
      line-height: 1.2;
      border: 2px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      min-height: 44px;
      white-space: nowrap;
      font-family: var(--font-sans);
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow);
    }
    .btn-primary:focus-visible {
      outline: 3px solid var(--accent);
      outline-offset: 2px;
    }
    .btn-primary:active {
      transform: translateY(0);
      box-shadow: none;
    }

    .btn-outline {
      background: #fff;
      color: var(--primary-dark);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background: var(--panel);
      color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }
    .btn-outline:focus-visible {
      outline: 3px solid var(--accent);
      outline-offset: 2px;
    }
    .btn-outline:active {
      transform: translateY(0);
    }

    .btn-orange {
      background: var(--orange);
      color: #fff;
      border-color: transparent;
    }
    .btn-orange:hover {
      background: #e8823a;
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 10px 24px -10px rgba(255, 159, 90, 0.6);
    }
    .btn-orange:focus-visible {
      outline: 3px solid var(--accent);
      outline-offset: 2px;
    }
    .btn-orange:active {
      transform: translateY(0);
    }

    /* ===== Badges ===== */
    .badge {
      display: inline-block;
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      background: var(--panel);
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 600;
      line-height: 1.6;
    }

    .badge-accent {
      background: rgba(89, 193, 189, 0.15);
      color: #2a8f8a;
    }

    /* ===== Header / Nav ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: #fff;
      border-bottom: 1px solid var(--border);
      box-shadow: 0 2px 10px rgba(23, 90, 135, 0.04);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }

    .logo {
      display: flex;
      align-items: baseline;
      gap: 2px;
      font-size: 22px;
      font-weight: 700;
      color: var(--primary-dark);
      line-height: 1.2;
      letter-spacing: -0.02em;
    }
    .logo span {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-secondary);
      margin-left: 2px;
    }
    .logo:hover {
      color: var(--primary);
    }

    .main-nav ul {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .main-nav a {
      display: inline-block;
      padding: 10px 18px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      transition: all 0.2s ease;
    }
    .main-nav a:hover {
      color: var(--primary-dark);
      background: var(--panel);
    }
    .main-nav a.active {
      background: var(--primary);
      color: #fff;
      font-weight: 600;
    }
    .main-nav a:focus-visible {
      outline: 3px solid var(--accent);
      outline-offset: 2px;
    }

    .nav-cta {
      margin-left: 8px;
      padding: 10px 22px;
      font-size: 14px;
    }

    .hamburger {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      background: #fff;
      color: var(--primary-dark);
      font-size: 18px;
      cursor: pointer;
      transition: all 0.2s ease;
      align-items: center;
      justify-content: center;
    }
    .hamburger:hover {
      background: var(--panel);
    }
    .hamburger:focus-visible {
      outline: 3px solid var(--accent);
    }

    /* ===== Hero Category ===== */
    .hero-category {
      background: linear-gradient(135deg, #E8F1F8 0%, #F5F9FD 100%);
      padding: var(--space-section) 0;
      position: relative;
      overflow: hidden;
    }
    .hero-category::before {
      content: "";
      position: absolute;
      top: -60px;
      right: -60px;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: rgba(77, 159, 216, 0.12);
      pointer-events: none;
    }
    .hero-category::after {
      content: "";
      position: absolute;
      bottom: -40px;
      left: 10%;
      width: 160px;
      height: 160px;
      border-radius: 50%;
      background: rgba(89, 193, 189, 0.1);
      pointer-events: none;
    }

    .hero-category .container {
      position: relative;
      z-index: 2;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(77, 159, 216, 0.15);
      color: var(--primary-dark);
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .hero-tag i {
      font-size: 12px;
    }

    .hero-category h1 {
      font-size: clamp(32px, 5.5vw, 52px);
      font-weight: 700;
      line-height: 1.2;
      color: var(--text);
      margin-bottom: 16px;
    }

    .hero-category .lead {
      font-size: 17px;
      color: var(--text-secondary);
      max-width: 540px;
      margin-bottom: 28px;
      line-height: 1.8;
    }

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

    .hero-img-card {
      background: #fff;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow);
      overflow: hidden;
      border: 1px solid var(--border);
      aspect-ratio: 4 / 3;
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: var(--panel);
      background-position: center;
      background-size: cover;
    }
    .hero-img-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* ===== Section Head ===== */
    .section-head {
      margin-bottom: 40px;
    }
    .section-head h2 {
      font-size: clamp(24px, 3vw, 34px);
      font-weight: 700;
      line-height: 1.3;
      color: var(--text);
      margin-bottom: 8px;
    }
    .section-head p {
      font-size: 15px;
      color: var(--text-secondary);
    }

    /* ===== Guide List (Category 1: 左文右图列表式) ===== */
    .guide-list-section {
      padding: var(--space-section) 0;
    }

    .guide-list {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .guide-card {
      display: flex;
      align-items: stretch;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .guide-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }

    .guide-text {
      flex: 1;
      padding: 28px 32px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .guide-text .badge {
      margin-bottom: 12px;
      align-self: flex-start;
    }
    .guide-text h3 {
      font-size: 20px;
      font-weight: 600;
      line-height: 1.4;
      color: var(--text);
      margin-bottom: 10px;
    }
    .guide-text h3 a {
      color: var(--text);
    }
    .guide-text h3 a:hover {
      color: var(--primary);
    }
    .guide-text h3 a:focus-visible {
      outline: 3px solid var(--accent);
      outline-offset: 2px;
      border-radius: 4px;
    }
    .guide-text p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .guide-meta {
      display: flex;
      gap: 18px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .guide-meta span {
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }
    .guide-meta i {
      font-size: 14px;
    }

    .guide-img {
      width: 320px;
      min-width: 260px;
      position: relative;
      background: var(--panel);
      overflow: hidden;
    }
    .guide-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .guide-card:hover .guide-img img {
      transform: scale(1.03);
    }
    .guide-img::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(255,255,255,0) 70%, rgba(255,255,255,0.08) 100%);
      pointer-events: none;
    }

    /* ===== Stats Strip ===== */
    .stats-strip {
      background: var(--primary-dark);
      padding: 56px 0;
      color: #fff;
    }
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-item {
      padding: 16px 12px;
    }
    .stat-num {
      display: block;
      font-family: var(--font-mono);
      font-size: clamp(28px, 3.5vw, 42px);
      font-weight: 700;
      color: #fff;
      line-height: 1.2;
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.75);
      letter-spacing: 0.02em;
    }
    .stat-item + .stat-item {
      border-left: 1px solid rgba(255, 255, 255, 0.14);
    }

    /* ===== More Links ===== */
    .more-links-section {
      padding: var(--space-section) 0;
    }
    .more-links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .more-link-card {
      display: flex;
      align-items: center;
      gap: 18px;
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .more-link-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
      border-color: rgba(77, 159, 216, 0.4);
    }
    .more-link-card .icon {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-sm);
      background: var(--panel);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      flex-shrink: 0;
    }
    .more-link-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 4px;
    }
    .more-link-card p {
      font-size: 14px;
      color: var(--text-secondary);
      margin: 0;
    }
    .more-link-card .arrow {
      margin-left: auto;
      color: var(--primary);
      font-size: 16px;
      transition: transform 0.2s ease;
    }
    .more-link-card:hover .arrow {
      transform: translateX(4px);
    }
    .more-link-card:focus-visible {
      outline: 3px solid var(--accent);
      outline-offset: 2px;
    }

    /* ===== CTA Subscribe ===== */
    .cta-subscribe {
      background: var(--primary-dark);
      padding: 80px 0;
      color: #fff;
      position: relative;
      overflow: hidden;
    }
    .cta-subscribe::before {
      content: "";
      position: absolute;
      top: -50px;
      right: 10%;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: rgba(255, 159, 90, 0.12);
    }
    .cta-inner {
      position: relative;
      z-index: 2;
      max-width: 640px;
      margin: 0 auto;
      text-align: center;
    }
    .cta-inner h2 {
      font-size: clamp(24px, 3vw, 34px);
      font-weight: 700;
      margin-bottom: 12px;
    }
    .cta-inner > p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.78);
      margin-bottom: 32px;
    }
    .subscribe-form {
      display: flex;
      gap: 12px;
      max-width: 520px;
      margin: 0 auto 14px;
    }
    .subscribe-form input[type="email"] {
      flex: 1;
      min-height: 52px;
      padding: 0 24px;
      border-radius: var(--radius-pill);
      border: 2px solid transparent;
      background: #fff;
      font-size: 15px;
      color: var(--text);
      font-family: var(--font-sans);
      transition: all 0.25s ease;
    }
    .subscribe-form input[type="email"]::placeholder {
      color: var(--text-muted);
    }
    .subscribe-form input[type="email"]:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(89, 193, 189, 0.25);
    }
    .subscribe-form .btn {
      min-height: 52px;
      padding: 0 32px;
    }
    .privacy-note {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.55);
      margin-top: 8px;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: var(--space-section) 0;
    }
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: box-shadow 0.25s ease;
    }
    .faq-item.open {
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      background: none;
      border: none;
      font-family: var(--font-sans);
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      text-align: left;
      cursor: pointer;
      min-height: 56px;
      transition: background 0.2s ease;
    }
    .faq-question:hover {
      background: var(--panel);
    }
    .faq-question:focus-visible {
      outline: 3px solid var(--accent);
      outline-offset: 2px;
    }
    .faq-question i {
      color: var(--primary);
      transition: transform 0.25s ease;
      flex-shrink: 0;
    }
    .faq-item.open .faq-question i {
      transform: rotate(180deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease, padding 0.25s ease;
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
    }
    .faq-answer p {
      padding: 0 24px 20px;
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.75;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #fff;
      border-top: 1px solid var(--border);
      padding: 64px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand .logo {
      margin-bottom: 14px;
    }
    .footer-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 300px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 16px;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a {
      font-size: 14px;
      color: var(--text-secondary);
    }
    .footer-col ul li a:hover {
      color: var(--primary);
    }
    .footer-col ul li a:focus-visible {
      outline: 3px solid var(--accent);
      outline-offset: 2px;
      border-radius: 4px;
    }
    .contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 12px;
    }
    .contact-item i {
      color: var(--primary);
      width: 16px;
      text-align: center;
    }
    .footer-bottom {
      border-top: 1px solid var(--border);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: var(--text-muted);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1023px) {
      .hero-category .grid-x {
        row-gap: 36px;
      }
      .guide-img {
        width: 260px;
        min-width: 220px;
      }
      .guide-text {
        padding: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
    }

    @media (max-width: 768px) {
      .hamburger {
        display: flex;
      }
      .main-nav {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 12px 24px rgba(23, 90, 135, 0.08);
        padding: 16px 20px;
        z-index: 99;
      }
      .main-nav.open {
        display: block;
      }
      .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
      }
      .main-nav a {
        display: block;
        padding: 14px 18px;
        text-align: center;
        font-size: 16px;
      }
      .nav-cta {
        display: none;
      }
      .hero-category {
        padding: 56px 0;
      }
      .hero-category .lead {
        font-size: 15px;
      }
      .stats-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .stat-item + .stat-item {
        border-left: none;
      }
      .stat-item:nth-child(2) {
        border-left: 1px solid rgba(255,255,255,0.14);
      }
      .stat-item:nth-child(3) {
        border-left: 1px solid rgba(255,255,255,0.14);
      }
      .guide-card {
        flex-direction: column;
      }
      .guide-img {
        width: 100%;
        min-width: 0;
        height: 200px;
        order: -1;
      }
      .more-links-grid {
        grid-template-columns: 1fr;
      }
      .subscribe-form {
        flex-direction: column;
      }
      .subscribe-form .btn {
        width: 100%;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }
      .hero-actions {
        flex-direction: column;
      }
      .hero-actions .btn {
        width: 100%;
      }
      .guide-text h3 {
        font-size: 18px;
      }
      .guide-meta {
        flex-wrap: wrap;
        gap: 10px;
      }
      .stats-row {
        gap: 8px;
      }
      .stat-num {
        font-size: 26px;
      }
      .stat-label {
        font-size: 13px;
      }
      .more-link-card {
        padding: 20px;
        flex-wrap: wrap;
      }
      .faq-question {
        font-size: 15px;
        padding: 16px 18px;
      }
    }