/* roulang page: index */
:root {
  --primary: #0a1f44;
  --primary-light: #122d5c;
  --primary-deep: #071731;
  --accent: #00e0a0;
  --accent-dark: #00b883;
  --accent-2: #ff6b4a;
  --bg: #f4f7fb;
  --bg-white: #ffffff;
  --bg-soft: #eef2f8;
  --text: #1a2332;
  --text-weak: #6b7a90;
  --text-muted: #93a1b5;
  --border: #e3e9f1;
  --radius: 18px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow: 0 10px 30px rgba(10, 31, 68, 0.08);
  --shadow-lg: 0 24px 60px rgba(10, 31, 68, 0.14);
  --shadow-accent: 0 12px 32px rgba(0, 224, 160, 0.32);
  --container: 1200px;
  --space: 96px;
  --header-h: 78px;
  --transition: 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--accent-dark);
}
button,
input {
  font-family: inherit;
  font-size: 100%;
  border: none;
  background: none;
  outline: none;
}
ul,
ol {
  list-style: none;
}
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #06281d;
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(0, 184, 131, 0.4);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 8px 20px rgba(0, 184, 131, 0.3);
}
.btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(6px);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}
.btn-dark {
  background: var(--primary);
  color: #fff;
}
.btn-dark:hover {
  background: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.btn:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(0, 224, 160, 0.55);
  outline-offset: 3px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 30px;
  backdrop-filter: blur(4px);
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 224, 160, 0.3);
}
.section {
  padding: var(--space) 0;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-head .tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
  background: rgba(0, 224, 160, 0.1);
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
  color: var(--primary);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.section-head p {
  margin-top: 14px;
  color: var(--text-weak);
  font-size: 16px;
}
/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid rgba(227, 233, 241, 0.8);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  box-shadow: 0 8px 30px rgba(10, 31, 68, 0.08);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 21px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--accent), #00c2ff);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #06281d;
  font-size: 18px;
  font-weight: 900;
  box-shadow: 0 6px 18px rgba(0, 224, 160, 0.4);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.main-nav a {
  padding: 10px 18px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  position: relative;
  transition: background var(--transition), color var(--transition);
}
.main-nav a:hover {
  color: var(--primary);
  background: rgba(10, 31, 68, 0.06);
}
.main-nav a.active {
  color: var(--primary);
  background: rgba(0, 224, 160, 0.14);
  font-weight: 600;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.search-box {
  position: relative;
}
.search-box input {
  width: 210px;
  height: 42px;
  background: var(--bg-soft);
  border-radius: 30px;
  padding: 0 18px 0 42px;
  font-size: 14px;
  color: var(--text);
  border: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition), width var(--transition);
}
.search-box input::placeholder {
  color: var(--text-muted);
}
.search-box input:focus {
  background: #fff;
  border-color: var(--accent);
  width: 260px;
}
.search-box svg {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  width: 17px;
  height: 17px;
  color: var(--text-muted);
  pointer-events: none;
}
.btn-sm {
  padding: 9px 22px;
  font-size: 14px;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--bg-soft);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: background var(--transition);
}
.nav-toggle:hover {
  background: var(--border);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(7, 23, 49, 0.94) 0%, rgba(10, 31, 68, 0.82) 50%, rgba(10, 38, 80, 0.68) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(0, 224, 160, 0.18), transparent 60%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  padding: 120px 32px 140px;
  max-width: 900px;
  margin-left: 0;
}
.hero .badge {
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(34px, 5.6vw, 60px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 22px;
}
.hero h1 .gradient-text {
  background: linear-gradient(120deg, var(--accent), #7bf0d2);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  max-width: 640px;
  margin-bottom: 34px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 26px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.68);
}
.hero-trust span {
  display: flex;
  align-items: center;
  gap: 7px;
}
.hero-trust svg {
  width: 15px;
  height: 15px;
  color: var(--accent);
  flex-shrink: 0;
}
/* Countdown */
.countdown-card {
  position: absolute;
  right: 28px;
  bottom: 48px;
  z-index: 3;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(18px);
  border-radius: 20px;
  padding: 22px 30px;
  display: flex;
  align-items: center;
  gap: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  animation: floatCard 4s ease-in-out infinite alternate;
}
@keyframes floatCard {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(-10px);
  }
}
.countdown-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.countdown-label svg {
  width: 17px;
  height: 17px;
  color: var(--accent-2);
}
.countdown-grid {
  display: flex;
  gap: 10px;
  align-items: center;
}
.countdown-cell {
  text-align: center;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 12px;
  padding: 8px 10px;
  min-width: 52px;
}
.countdown-cell b {
  display: block;
  font-size: 26px;
  line-height: 1.2;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.countdown-cell small {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.6);
  display: block;
  margin-top: 2px;
}
/* ===== Stats ===== */
.stats-section {
  padding: 0 0 var(--space);
  margin-top: -60px;
  position: relative;
  z-index: 5;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: #fff;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  padding: 36px 40px;
  border: 1px solid var(--border);
}
.stat-item {
  text-align: center;
  padding: 8px 12px;
}
.stat-num {
  font-size: 40px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.stat-num .suffix {
  font-size: 22px;
  color: var(--accent-2);
}
.stat-label {
  font-size: 14px;
  color: var(--text-weak);
  margin-top: 6px;
}
/* ===== Features ===== */
.features-section {
  background: var(--bg-white);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 224, 160, 0.4);
}
.feature-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.feature-card:hover .feature-media img {
  transform: scale(1.05);
}
.feature-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 31, 68, 0.35), transparent 60%);
}
.feature-body {
  padding: 26px 26px 30px;
}
.feature-body .icon-circle {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  background: rgba(0, 224, 160, 0.12);
  color: var(--accent-dark);
  margin-bottom: 16px;
}
.feature-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.feature-body p {
  font-size: 14.5px;
  color: var(--text-weak);
  line-height: 1.7;
}
/* ===== Category Entry ===== */
.category-section {
  background:
    linear-gradient(135deg, rgba(7, 23, 49, 0.92), rgba(10, 40, 80, 0.86)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
}
.category-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: center;
}
.category-copy .badge {
  margin-bottom: 18px;
}
.category-copy h2 {
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1.3;
  margin-bottom: 16px;
}
.category-copy p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 26px;
  max-width: 460px;
}
.category-copy .category-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.category-links a {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 30px;
  padding: 8px 20px;
  font-size: 14px;
  color: #fff;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.category-links a:hover {
  background: rgba(0, 224, 160, 0.22);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.category-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(16px);
  border-radius: 24px;
  padding: 34px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition);
}
.category-card:hover {
  transform: translateY(-6px);
}
.category-card .emoji {
  font-size: 38px;
  margin-bottom: 18px;
  display: block;
}
.category-card h3 {
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 12px;
}
.category-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 20px;
}
.category-meta {
  display: flex;
  gap: 14px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.6);
}
.category-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}
/* ===== News List ===== */
.news-section {
  background: var(--bg);
}
.news-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 36px;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.news-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.news-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.news-thumb {
  position: relative;
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  transition: transform 0.4s ease;
}
.news-item:hover .news-thumb img {
  transform: scale(1.06);
}
.news-body {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.news-cat {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-dark);
  background: rgba(0, 224, 160, 0.1);
  border-radius: 20px;
  padding: 4px 12px;
}
.news-body h3 {
  font-size: 17px;
  line-height: 1.55;
  font-weight: 650;
}
.news-body h3 a {
  color: var(--text);
  transition: color var(--transition);
}
.news-body h3 a:hover {
  color: var(--accent-dark);
}
.news-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-time {
  font-size: 12.5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.empty-tip {
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  color: var(--text-weak);
  font-size: 15px;
}
/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.side-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 26px;
  box-shadow: var(--shadow);
}
.side-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  padding-bottom: 14px;
  border-bottom: 2px solid var(--bg-soft);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-card h3 .side-icon {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(0, 224, 160, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-cloud a {
  background: var(--bg-soft);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-weak);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.tag-cloud a:hover {
  background: rgba(0, 224, 160, 0.14);
  color: var(--accent-dark);
  transform: translateY(-2px);
}
.side-subscribe {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border: none;
}
.side-subscribe h3 {
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, 0.15);
}
.side-subscribe p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 18px;
  line-height: 1.7;
}
.subscribe-input {
  display: flex;
  background: rgba(255, 255, 255, 0.14);
  border-radius: 40px;
  padding: 5px;
  margin-bottom: 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.subscribe-input input {
  flex: 1;
  background: transparent;
  padding: 9px 16px;
  color: #fff;
  font-size: 14px;
  min-width: 0;
}
.subscribe-input input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}
.subscribe-input button {
  background: var(--accent);
  color: #06281d;
  border-radius: 30px;
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition);
  white-space: nowrap;
}
.subscribe-input button:hover {
  background: var(--accent-2);
}
/* ===== Steps ===== */
.steps-section {
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  counter-reset: step;
}
.step-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 38px 32px;
  position: relative;
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.step-num {
  font-size: 46px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 2px var(--accent);
  line-height: 1;
  margin-bottom: 18px;
  font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, sans-serif;
}
.step-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.step-card p {
  font-size: 14.5px;
  color: var(--text-weak);
  line-height: 1.7;
}
/* ===== Highlights ===== */
.highlights-section {
  background: var(--bg);
}
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.hl-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 30px 26px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.hl-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(0, 224, 160, 0.4);
}
.hl-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 18px;
  border-radius: 17px;
  background: linear-gradient(135deg, rgba(0, 224, 160, 0.15), rgba(0, 194, 255, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
}
.hl-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.hl-card p {
  font-size: 13.5px;
  color: var(--text-weak);
  line-height: 1.65;
}
/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-white);
}
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item[open] {
  border-color: rgba(0, 224, 160, 0.45);
  box-shadow: var(--shadow);
  background: #fff;
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary .faq-icon {
  width: 30px;
  height: 30px;
  min-width: 30px;
  border-radius: 50%;
  background: rgba(0, 224, 160, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: var(--accent-dark);
  transition: transform var(--transition), background var(--transition);
}
.faq-item[open] summary .faq-icon {
  transform: rotate(45deg);
  background: rgba(255, 107, 74, 0.12);
  color: var(--accent-2);
}
.faq-item .faq-answer {
  padding: 0 24px 22px;
  font-size: 14.5px;
  color: var(--text-weak);
  line-height: 1.75;
}
/* ===== CTA ===== */
.cta-section {
  position: relative;
  background:
    linear-gradient(135deg, rgba(7, 23, 49, 0.9), rgba(10, 38, 80, 0.85)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  text-align: center;
  padding: 110px 0;
  color: #fff;
}
.cta-inner {
  max-width: 640px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}
.cta-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 34px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}
/* ===== Footer ===== */
.site-footer {
  background: var(--primary-deep);
  color: rgba(255, 255, 255, 0.7);
  padding: 70px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 46px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 28px;
}
.footer-brand .brand {
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  max-width: 360px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.62);
  transition: color var(--transition), padding-left var(--transition);
}
.footer-col ul a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}
/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root {
    --space: 72px;
  }
  .container {
    padding: 0 24px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 16px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .news-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .category-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .countdown-card {
    position: static;
    margin: 40px 0 0;
    max-width: max-content;
    animation: none;
  }
  .hero {
    min-height: auto;
  }
  .hero-inner {
    padding: 120px 24px 60px;
  }
}
@media (max-width: 768px) {
  :root {
    --space: 56px;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 18px 24px 22px;
    box-shadow: 0 20px 40px rgba(10, 31, 68, 0.12);
    border-bottom: 1px solid var(--border);
    transform: translateY(-16px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .main-nav a {
    padding: 13px 18px;
    font-size: 16px;
    border-radius: 12px;
  }
  .search-box {
    display: none;
  }
  .header-actions .btn-sm {
    display: none;
  }
  .hero h1 {
    font-size: 34px;
  }
  .hero-sub {
    font-size: 15.5px;
  }
  .hero-actions .btn {
    width: 100%;
    max-width: 260px;
  }
  .features-grid,
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .news-item {
    grid-template-columns: 1fr;
  }
  .news-thumb {
    height: 190px;
    position: relative;
  }
  .news-thumb img {
    position: absolute;
    height: 100%;
    width: 100%;
  }
  .sidebar {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 24px 20px;
  }
  .stat-num {
    font-size: 30px;
  }
  .cta-section {
    padding: 70px 0;
  }
  .cta-actions .btn {
    width: 100%;
    max-width: 280px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .hero-inner {
    padding: 90px 16px 50px;
  }
  .hero h1 {
    font-size: 29px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
    max-width: none;
  }
  .hero-trust {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .highlights-grid {
    grid-template-columns: 1fr;
  }
  .countdown-card {
    padding: 16px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .news-body {
    padding: 18px;
  }
  .news-thumb {
    height: 160px;
  }
  .subscribe-input {
    flex-direction: column;
    background: transparent;
    gap: 8px;
    padding: 0;
  }
  .subscribe-input input {
    background: rgba(255, 255, 255, 0.14);
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.2);
  }
  .subscribe-input button {
    width: 100%;
  }
}

/* roulang page: category1 */
:root {
  --primary: #16a34a;
  --primary-hover: #15803d;
  --primary-soft: #e8f9ee;
  --accent: #f59e0b;
  --accent-soft: #fef3c7;
  --dark: #0d1b2a;
  --dark-soft: #14283c;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #0f1728;
  --text-body: #3e4a5c;
  --text-muted: #7a8ba0;
  --border: #e3e9f1;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, .06);
  --shadow-md: 0 10px 32px rgba(15, 23, 42, .08);
  --shadow-lg: 0 24px 64px rgba(15, 23, 42, .12);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container: 1200px;
  --transition: .25s ease;
}

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

html { scroll-behavior: smooth; }

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

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }

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

.section { padding: 92px 0; }

.section-head { max-width: 680px; margin: 0 auto 52px; text-align: center; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 40px;
  padding: 6px 16px;
  margin-bottom: 16px;
}
.section-head h2 { font-size: 34px; line-height: 1.3; font-weight: 800; color: var(--text); letter-spacing: -.02em; margin-bottom: 14px; }
.section-head p { font-size: 16px; color: var(--text-muted); line-height: 1.75; }

.section-center { text-align: center; margin-top: 44px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 20px rgba(22, 163, 74, .25); }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(22, 163, 74, .32); }
.btn-ghost { background: rgba(255, 255, 255, .1); color: #fff; border: 1px solid rgba(255, 255, 255, .35); backdrop-filter: blur(6px); }
.btn-ghost:hover { background: rgba(255, 255, 255, .18); transform: translateY(-2px); border-color: rgba(255, 255, 255, .6); }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary-soft); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--dark); }
.btn-light:hover { background: #f1f5f9; transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0, 0, 0, .18); }
.btn-sm { padding: 9px 18px; font-size: 14px; border-radius: 10px; }
.btn-lg { padding: 15px 34px; font-size: 16px; border-radius: 14px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, .7);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: 0 4px 24px rgba(15, 23, 42, .07); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 70px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--text); letter-spacing: -.02em; }
.brand-icon {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), #0ea5e9);
  color: #fff; font-size: 15px; font-weight: 800;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(22, 163, 74, .3);
}
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 10px;
  transition: all var(--transition);
}
.main-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.main-nav a.active { color: var(--primary); background: var(--primary-soft); font-weight: 700; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.search-box {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0 14px;
  height: 40px;
  width: 230px;
  transition: all var(--transition);
}
.search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(22, 163, 74, .12); background: #fff; }
.search-box svg { width: 16px; height: 16px; color: var(--text-muted); flex-shrink: 0; }
.search-box input { border: none; outline: none; background: transparent; font-size: 14px; width: 100%; color: var(--text); }
.search-box input::placeholder { color: var(--text-muted); }
.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 42px; height: 42px; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; padding: 10px; }
.nav-toggle span { display: block; height: 2px; width: 100%; background: var(--text); border-radius: 4px; transition: all .3s ease; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Category Hero ===== */
.cat-hero {
  position: relative;
  padding: 140px 0 120px;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  text-align: center;
  isolation: isolate;
}
.cat-hero::before {
  content: '';
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(120deg, rgba(6, 15, 26, .82), rgba(10, 30, 22, .72));
}
.hero-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: #fff;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 40px;
  padding: 7px 18px;
  margin-bottom: 22px;
  backdrop-filter: blur(8px);
}
.cat-hero h1 {
  font-size: 48px;
  line-height: 1.25;
  color: #fff;
  font-weight: 800;
  letter-spacing: -.02em;
  max-width: 720px;
  margin: 0 auto 18px;
}
.cat-hero .hero-subtitle {
  font-size: 17px;
  color: rgba(255, 255, 255, .82);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.hero-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats {
  display: flex; justify-content: center; gap: 40px; flex-wrap: wrap;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, .16);
}
.hero-stats div { text-align: center; }
.hero-stats strong { display: block; font-size: 28px; font-weight: 800; color: #fff; margin-bottom: 4px; }
.hero-stats span { font-size: 13px; color: rgba(255, 255, 255, .7); }

/* ===== Features ===== */
.cat-features { background: #fff; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  text-align: center;
  transition: all var(--transition);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); background: #fff; border-color: rgba(22, 163, 74, .2); }
.feature-icon {
  width: 64px; height: 64px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  background: var(--primary-soft);
  border-radius: 18px;
  margin: 0 auto 20px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.75; }

/* ===== Tag Section ===== */
.tag-section { padding: 80px 0; }
.tag-wrap { text-align: center; }
.tag-wrap .section-tag { background: var(--accent-soft); color: #d97706; }
.tag-wrap h2 { font-size: 30px; font-weight: 800; color: var(--text); margin-bottom: 14px; letter-spacing: -.02em; }
.tag-list { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 34px; max-width: 820px; margin-left: auto; margin-right: auto; }
.tag-item {
  display: inline-block;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-body);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 40px;
  transition: all var(--transition);
}
.tag-item:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-soft); transform: translateY(-2px); box-shadow: var(--shadow-sm); }

/* ===== News Section ===== */
.news-section { background: #fff; }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.news-card {
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(22, 163, 74, .2); }
.card-media { position: relative; display: block; aspect-ratio: 16 / 9; overflow: hidden; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.news-card:hover .card-media img { transform: scale(1.05); }
.badge {
  position: absolute;
  left: 14px; top: 14px;
  background: rgba(13, 27, 42, .72);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 30px;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, .18);
  letter-spacing: .02em;
}
.card-body { padding: 24px 24px 22px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 18px; line-height: 1.55; font-weight: 700; color: var(--text); margin-bottom: 12px; letter-spacing: -.01em; }
.card-body h3 a:hover { color: var(--primary); }
.card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 18px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: flex; gap: 16px; margin-top: auto; font-size: 13px; color: var(--text-muted); }
.card-meta span { display: inline-flex; align-items: center; gap: 5px; }

/* ===== Data Section ===== */
.data-section {
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  position: relative;
  padding: 80px 0;
  isolation: isolate;
}
.data-section::before {
  content: '';
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(120deg, rgba(8, 17, 28, .9), rgba(11, 32, 22, .84));
}
.data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.data-item { text-align: center; padding: 30px 16px; background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .12); border-radius: var(--radius-lg); backdrop-filter: blur(8px); transition: all var(--transition); }
.data-item:hover { background: rgba(255, 255, 255, .1); transform: translateY(-4px); }
.data-item strong { display: block; font-size: 32px; font-weight: 800; color: #fff; margin-bottom: 6px; }
.data-item span { font-size: 14px; color: rgba(255, 255, 255, .72); }

/* ===== Process ===== */
.process-section { background: var(--bg); }
.process-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.process-step { position: relative; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px 30px; text-align: center; transition: all var(--transition); }
.process-step:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.step-num {
  display: inline-block;
  font-size: 14px;
  font-weight: 800;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 18px;
  letter-spacing: .06em;
}
.process-step h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.process-step p { font-size: 14px; color: var(--text-muted); line-height: 1.75; }

/* ===== FAQ ===== */
.faq-section { background: #fff; }
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  transition: all var(--transition);
}
.faq-item:hover { border-color: rgba(22, 163, 74, .25); box-shadow: var(--shadow-sm); }
.faq-item[open] { border-color: var(--primary); box-shadow: var(--shadow-md); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 22px;
  font-weight: 400;
  color: var(--primary);
  flex-shrink: 0;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-soft);
  border-radius: 50%;
  transition: transform .3s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 26px 22px; font-size: 14px; color: var(--text-muted); line-height: 1.75; }

/* ===== CTA ===== */
.cta-section {
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  position: relative;
  padding: 96px 0;
  text-align: center;
  isolation: isolate;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(120deg, rgba(6, 15, 26, .88), rgba(9, 30, 20, .82));
}
.cta-section h2 { font-size: 36px; font-weight: 800; color: #fff; margin-bottom: 14px; letter-spacing: -.02em; }
.cta-section p { font-size: 16px; color: rgba(255, 255, 255, .78); max-width: 580px; margin: 0 auto 34px; line-height: 1.75; }
.cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, .7);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .brand { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, .62); max-width: 360px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 12px; }
.footer-col a { font-size: 14px; color: rgba(255, 255, 255, .66); transition: color var(--transition); }
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255, 255, 255, .45);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .search-box { width: 180px; }
  .feature-grid { gap: 18px; }
  .feature-card { padding: 28px 20px; }
  .news-grid { gap: 20px; }
  .data-grid { gap: 18px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 27px; }
  .cat-hero { padding: 96px 0 80px; }
  .cat-hero h1 { font-size: 34px; }
  .hero-stats { gap: 24px; }
  .nav-wrap { height: 64px; }
  .search-box { display: none; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 18px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-16px);
    opacity: 0;
    pointer-events: none;
    transition: all .3s ease;
    border-radius: 0 0 20px 20px;
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .main-nav a { padding: 12px 14px; font-size: 16px; }
  .nav-toggle { display: flex; }
  .feature-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .process-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-actions .btn { width: 100%; max-width: 240px; }
  .cta-section h2 { font-size: 28px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .cat-hero { padding: 80px 0 64px; }
  .cat-hero h1 { font-size: 28px; }
  .cat-hero .hero-subtitle { font-size: 15px; }
  .hero-stats { gap: 16px; flex-direction: column; }
  .hero-stats div { display: flex; align-items: baseline; justify-content: center; gap: 8px; }
  .hero-stats strong { font-size: 22px; margin-bottom: 0; }
  .hero-stats span { font-size: 13px; }
  .tag-list { gap: 10px; }
  .tag-item { padding: 8px 16px; font-size: 13px; }
  .data-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .data-item { padding: 22px 10px; }
  .data-item strong { font-size: 24px; }
  .btn-lg { width: 100%; max-width: 260px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .faq-item summary { padding: 16px 18px; font-size: 15px; }
  .faq-item p { padding: 0 18px 18px; font-size: 13px; }
  .card-body { padding: 18px 16px; }
  .card-body h3 { font-size: 16px; }
  .section-head { margin-bottom: 36px; }
}

/* roulang page: article */
:root{
  --primary:#165DFF;
  --primary-dark:#0E42D2;
  --primary-light:#EAF1FF;
  --accent:#FF7A1A;
  --accent-light:#FFF1E6;
  --dark:#0B1B3A;
  --dark-2:#10254F;
  --bg:#F5F7FC;
  --card:#FFFFFF;
  --text:#1D2A43;
  --muted:#68748F;
  --border:#E6EBF5;
  --radius:16px;
  --radius-sm:10px;
  --radius-lg:24px;
  --shadow:0 10px 30px rgba(11,27,58,.08);
  --shadow-lg:0 20px 50px rgba(11,27,58,.14);
  --transition:all .25s ease;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.75;font-size:16px}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}
button,input{font-family:inherit;border:none;outline:none}
ul,ol{list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(22,93,255,.45);outline-offset:2px;border-radius:4px}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-head{text-align:center;margin-bottom:48px}
.section-head h2{font-size:clamp(26px,3.2vw,38px);font-weight:800;letter-spacing:-.02em;color:var(--dark)}
.section-head p{color:var(--muted);margin-top:10px;font-size:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:999px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:var(--transition);white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(22,93,255,.28)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 12px 26px rgba(22,93,255,.35)}
.btn-secondary{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,122,26,.26)}
.btn-secondary:hover{background:#E86A0B;transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--primary);box-shadow:0 8px 24px rgba(0,0,0,.14)}
.btn-light:hover{background:var(--primary-light);transform:translateY(-2px)}
.btn-outline-light{border-color:rgba(255,255,255,.7);color:#fff;background:rgba(255,255,255,.08)}
.btn-outline-light:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.btn-sm{padding:8px 18px;font-size:14px}
.btn-lg{padding:14px 32px;font-size:16px}
.btn-block{width:100%}
.badge{display:inline-flex;align-items:center;gap:4px;background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:600;padding:4px 12px;border-radius:999px}
.tag{display:inline-flex;align-items:center;background:var(--bg);border:1px solid var(--border);color:var(--muted);font-size:13px;padding:5px 14px;border-radius:999px;transition:var(--transition)}
.tag:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:var(--transition)}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:var(--dark);line-height:1.2}
.brand-icon{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;font-size:15px;font-weight:700;box-shadow:0 6px 16px rgba(22,93,255,.3);flex-shrink:0}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:9px 18px;border-radius:999px;font-size:15px;font-weight:500;color:var(--dark);transition:var(--transition)}
.main-nav a:hover{background:var(--primary-light);color:var(--primary)}
.main-nav a.active{background:var(--primary);color:#fff;font-weight:600;box-shadow:0 6px 16px rgba(22,93,255,.28)}
.header-actions{display:flex;align-items:center;gap:14px}
.search-box{display:flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--border);border-radius:999px;padding:8px 16px;width:260px;transition:var(--transition)}
.search-box:focus-within{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(22,93,255,.12)}
.search-box svg{width:17px;height:17px;color:var(--muted);flex-shrink:0}
.search-box input{background:transparent;width:100%;font-size:14px;color:var(--text)}
.search-box input::placeholder{color:#9AA6BE}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:8px;cursor:pointer;border-radius:8px}
.nav-toggle span{width:22px;height:2px;background:var(--dark);border-radius:2px;transition:var(--transition)}
.page-hero{color:#fff;padding:90px 0 72px;background-size:cover;background-position:center;position:relative}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:18px;flex-wrap:wrap}
.breadcrumb a{color:rgba(255,255,255,.85);transition:var(--transition)}
.breadcrumb a:hover{color:#fff}
.page-title{font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.3;max-width:820px;letter-spacing:-.02em}
.page-sub{margin-top:14px;color:rgba(255,255,255,.76);font-size:16px}
.article-section{padding:56px 0 70px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:40px;align-items:start}
.article-main{padding:40px 44px;margin-top:-44px;overflow:hidden}
.article-meta{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.meta-time{color:var(--muted);font-size:14px}
.article-title{font-size:clamp(24px,3vw,32px);font-weight:800;line-height:1.35;margin-bottom:24px;letter-spacing:-.02em;color:var(--dark)}
.article-body{font-size:16px;line-height:1.9;color:#2A3650}
.article-body h2{font-size:22px;font-weight:700;margin:32px 0 16px;padding-left:14px;border-left:4px solid var(--primary);color:var(--dark)}
.article-body h3{font-size:19px;font-weight:700;margin:24px 0 12px;color:var(--dark)}
.article-body p{margin-bottom:18px}
.article-body ul,.article-body ol{padding-left:24px;margin-bottom:18px}
.article-body ul li{list-style:disc;margin-bottom:8px}
.article-body ol li{list-style:decimal;margin-bottom:8px}
.article-body img{border-radius:var(--radius);margin:20px 0;box-shadow:var(--shadow)}
.article-body blockquote{border-left:4px solid var(--accent);background:var(--accent-light);padding:14px 20px;border-radius:0 12px 12px 0;margin:20px 0;color:#7A3A0B}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 14px;text-align:left;font-size:14px}
.article-body th{background:var(--primary-light);color:var(--primary);font-weight:700}
.article-tags{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:30px;padding-top:24px;border-top:1px solid var(--border);font-size:14px;color:var(--muted)}
.not-found{text-align:center;padding:40px 10px}
.not-found-icon{width:76px;height:76px;margin:0 auto 20px;background:var(--primary-light);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--primary)}
.not-found-icon svg{width:34px;height:34px}
.not-found h1{font-size:30px;font-weight:800;margin-bottom:12px;color:var(--dark)}
.not-found p{color:var(--muted);margin-bottom:24px}
.article-side{display:flex;flex-direction:column;gap:24px}
.widget{padding:24px}
.widget h3{font-size:17px;font-weight:700;margin-bottom:16px;position:relative;padding-bottom:12px;color:var(--dark)}
.widget h3::after{content:"";position:absolute;left:0;bottom:0;width:34px;height:3px;border-radius:2px;background:var(--primary)}
.widget-list{display:flex;flex-direction:column;gap:4px}
.widget-list li{border-bottom:1px dashed var(--border);padding:10px 0}
.widget-list li:last-child{border-bottom:none;padding-bottom:0}
.widget-list a{display:flex;flex-direction:column;gap:4px;transition:var(--transition)}
.widget-list a:hover .widget-title{color:var(--primary)}
.widget-title{font-size:14.5px;font-weight:600;color:var(--text);line-height:1.5;transition:var(--transition)}
.widget-meta{font-size:12.5px;color:var(--muted)}
.tags-cloud{display:flex;flex-wrap:wrap;gap:8px}
.widget-cta{background:linear-gradient(135deg,var(--dark),var(--dark-2));border-color:transparent;color:#fff}
.widget-cta h3{color:#fff}
.widget-cta h3::after{background:var(--accent)}
.widget-cta p{color:rgba(255,255,255,.72);font-size:14px;margin-bottom:18px}
.related-section{padding:60px 0 72px;background:var(--bg)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.related-card{display:flex;flex-direction:column;overflow:hidden;text-decoration:none;color:inherit}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.related-img{height:172px;overflow:hidden}
.related-img img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.related-card:hover .related-img img{transform:scale(1.06)}
.related-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px}
.related-body h3{font-size:16.5px;font-weight:700;line-height:1.5;color:var(--dark)}
.related-body p{font-size:13.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-meta{font-size:12.5px;color:var(--muted)}
.stats-section{padding:64px 0;background-size:cover;background-position:center;color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat-item strong{display:block;font-size:clamp(30px,4vw,44px);font-weight:800;background:linear-gradient(135deg,#fff,#BFD4FF);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat-item span{color:rgba(255,255,255,.72);font-size:14px;margin-top:6px;display:block}
.faq-section{padding:72px 0}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.faq-item{padding:6px 22px}
.faq-item[open]{box-shadow:var(--shadow);border-color:rgba(22,93,255,.25)}
.faq-item summary{cursor:pointer;padding:16px 0;font-size:16px;font-weight:600;color:var(--dark);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;font-weight:400;color:var(--primary);transition:var(--transition);flex-shrink:0;line-height:1}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 0 18px;color:var(--muted);font-size:14.5px}
.cta-section{padding:40px 0 80px}
.cta-card{background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:var(--radius-lg);padding:52px 56px;display:flex;align-items:center;justify-content:space-between;gap:30px;color:#fff;box-shadow:0 24px 60px rgba(22,93,255,.32);position:relative;overflow:hidden}
.cta-card::after{content:"";position:absolute;right:-80px;top:-80px;width:240px;height:240px;border-radius:50%;background:rgba(255,255,255,.12)}
.cta-card h2{font-size:clamp(22px,2.6vw,30px);font-weight:800}
.cta-card p{color:rgba(255,255,255,.82);margin-top:8px;font-size:15px}
.cta-actions{display:flex;gap:14px;flex-shrink:0;position:relative;z-index:2}
.site-footer{background:var(--dark);color:rgba(255,255,255,.8);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;padding-bottom:44px}
.footer-brand .brand{color:#fff;margin-bottom:4px}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.62);max-width:380px;margin-top:12px;line-height:1.8}
.footer-col h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:18px}
.footer-col ul li{margin-bottom:12px}
.footer-col ul li a{color:rgba(255,255,255,.7);font-size:14px;transition:var(--transition)}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:13px;color:rgba(255,255,255,.5);flex-wrap:wrap}
@media (max-width:1024px){
  .article-layout{grid-template-columns:1fr}
  .search-box{width:200px}
  .related-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .main-nav{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 24px;border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);gap:8px}
  .main-nav.open{display:flex}
  .nav-toggle{display:flex}
  .search-box{display:none}
  .page-hero{padding:60px 0 50px}
  .article-section{padding:40px 0 56px}
  .related-section{padding:44px 0 56px}
  .faq-section{padding:52px 0}
  .cta-section{padding:24px 0 56px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .faq-grid{grid-template-columns:1fr}
  .cta-card{flex-direction:column;text-align:center;padding:40px 28px}
  .cta-actions{flex-direction:column}
  .footer-grid{grid-template-columns:1fr;gap:32px}
}
@media (max-width:640px){
  .article-main{padding:28px 22px;margin-top:-24px}
  .related-grid{grid-template-columns:1fr}
  .header-actions .btn{display:none}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .section-head{margin-bottom:32px}
  .brand{font-size:17px}
  .brand-icon{width:36px;height:36px;font-size:14px;border-radius:10px}
  .nav-wrap{height:64px}
  .main-nav{top:64px}
  .page-title{font-size:28px}
  .stats-grid{gap:20px}
  .cta-card{padding:36px 22px}
  .footer-bottom{justify-content:center;text-align:center}
}