/* roulang page: index */
/* ===== Design Tokens ===== */
:root {
  --primary: #1a4fd6;
  --primary-dark: #123a9e;
  --primary-light: #eaf0fe;
  --accent: #00b894;
  --accent-light: #e6f9f4;
  --bg: #f7f9fc;
  --surface: #ffffff;
  --text: #17233d;
  --text-weak: #66748e;
  --border: #e3e9f2;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(23, 35, 61, 0.06);
  --shadow-md: 0 8px 30px rgba(23, 35, 61, 0.08);
  --shadow-lg: 0 16px 50px rgba(23, 35, 61, 0.12);
  --spacing-section: 96px;
  --spacing-section-md: 64px;
  --container-width: 1240px;
  --header-h: 76px;
  --channel-h: 52px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ===== Reset / Base ===== */
*,
*::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: 1.7;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
ul,
ol {
  list-style: none;
}
button,
input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--spacing-section) 0;
}
.section.tight {
  padding: var(--spacing-section-md) 0;
}
.section-alt {
  background: var(--surface);
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 16px;
  border-radius: 100px;
  letter-spacing: 0.5px;
}
.section-title {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 800;
  margin-top: 18px;
  letter-spacing: -0.5px;
}
.section-desc {
  font-size: 16px;
  color: var(--text-weak);
  margin-top: 12px;
  max-width: 640px;
  line-height: 1.8;
}
.text-center {
  text-align: center;
}
.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(26, 79, 214, 0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 79, 214, 0.4);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}
.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(23, 35, 61, 0.12);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(23, 35, 61, 0.18);
}
.btn-lg {
  padding: 17px 40px;
  font-size: 16px;
}

/* ===== Header ===== */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.header-top {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), #3a6ff0);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(26, 79, 214, 0.35);
}
.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.3px;
}
.logo-sub {
  font-size: 12px;
  color: var(--text-weak);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border-radius: 100px;
  padding: 8px 6px 8px 18px;
  border: 1px solid transparent;
  transition: all 0.3s;
}
.search-box:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(26, 79, 214, 0.1);
}
.search-box input {
  width: 180px;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--text);
}
.search-box input::placeholder {
  color: var(--text-weak);
}
.search-box button {
  background: var(--primary);
  color: #fff;
  border-radius: 100px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.3s;
}
.search-box button:hover {
  background: var(--primary-dark);
}
.header-cta {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--primary);
  padding: 10px 24px;
  border-radius: 100px;
  transition: all 0.3s;
}
.header-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}
.channel-nav {
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.channel-list {
  display: flex;
  align-items: center;
  gap: 4px;
  height: var(--channel-h);
  overflow-x: auto;
  scrollbar-width: none;
}
.channel-list::-webkit-scrollbar {
  display: none;
}
.channel-list a {
  padding: 8px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-weak);
  border-radius: 100px;
  white-space: nowrap;
  transition: all 0.3s;
  position: relative;
}
.channel-list a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.channel-list a.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 700;
}
.channel-list a .badge-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  margin-left: 6px;
  vertical-align: 2px;
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--bg);
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
}
.mobile-panel {
  display: none;
  padding: 12px 24px 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.mobile-panel a {
  display: block;
  padding: 12px 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  border-radius: var(--radius-sm);
}
.mobile-panel a.active {
  color: var(--primary);
  background: var(--primary-light);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 140px 0 120px;
  background: linear-gradient(135deg, #0d1b3e 0%, #132a5e 40%, #1a4fd6 100%);
  color: #fff;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  mix-blend-mode: overlay;
}
.hero::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 184, 148, 0.3) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(10px);
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.hero-title {
  font-size: 50px;
  line-height: 1.2;
  font-weight: 900;
  margin: 24px 0 20px;
  letter-spacing: -1px;
}
.hero-title .highlight {
  color: #66b3ff;
}
.hero-desc {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-metrics {
  display: flex;
  gap: 48px;
  margin-top: 60px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}
.metric-item .metric-num {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.metric-item .metric-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

/* ===== Feature Cards ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.feature-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity 0.4s;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 24px;
}
.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.8;
}
.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.3s;
}
.feature-link:hover {
  gap: 10px;
}

/* ===== Category Cards ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.category-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.4s ease;
  display: block;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.category-cover {
  height: 180px;
  position: relative;
  overflow: hidden;
}
.category-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.category-card:hover .category-cover img {
  transform: scale(1.06);
}
.category-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(13, 27, 46, 0.5));
}
.category-body {
  padding: 28px;
}
.category-tag {
  font-size: 13px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 14px;
  border-radius: 100px;
  font-weight: 600;
  display: inline-block;
}
.category-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 14px 0 10px;
}
.category-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
}
.category-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

/* ===== Info Section ===== */
.info-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.info-visual {
  position: relative;
}
.info-visual img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.info-visual::before {
  content: "";
  position: absolute;
  top: -20px;
  left: -20px;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
  z-index: -1;
}
.info-content h2 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 800;
  margin: 16px 0;
}
.info-content p {
  font-size: 16px;
  color: var(--text-weak);
  line-height: 1.9;
}
.info-list {
  margin-top: 28px;
}
.info-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px 0;
  font-size: 15px;
}
.info-list li .check-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== Stats ===== */
.stats-band {
  background: linear-gradient(135deg, #0d1b3e, #132a5e);
  padding: 72px 0;
  color: #fff;
  border-radius: var(--radius-lg);
  margin-top: 0;
  position: relative;
  overflow: hidden;
}
.stats-band::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 184, 148, 0.3), transparent 70%);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.stat-item .stat-num {
  font-size: 40px;
  font-weight: 900;
  letter-spacing: -1px;
}
.stat-item .stat-num span {
  font-size: 24px;
  margin-left: 2px;
}
.stat-item .stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 8px;
}

/* ===== News List ===== */
.news-wrap {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 40px;
  margin-top: 48px;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  display: block;
}
.news-item:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
  transform: translateY(-2px);
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.news-cat {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 12px;
  border-radius: 100px;
}
.news-time {
  font-size: 13px;
  color: var(--text-weak);
}
.news-item h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
  transition: color 0.3s;
}
.news-item:hover h3 {
  color: var(--primary);
}
.news-item p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.sidebar-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
}
.sidebar-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}
.sidebar-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.sidebar-list li:last-child {
  border-bottom: none;
}
.sidebar-list a {
  font-size: 14px;
  color: var(--text);
  transition: color 0.3s;
  display: block;
}
.sidebar-list a:hover {
  color: var(--primary);
}
.empty-tip {
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 48px;
  text-align: center;
  color: var(--text-weak);
  font-size: 15px;
}

/* ===== Process Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.step-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border);
  position: relative;
  transition: all 0.4s ease;
}
.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.step-num {
  font-size: 48px;
  font-weight: 900;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: 16px;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
}
.step-line {
  position: absolute;
  top: 48px;
  right: -24px;
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--border), var(--accent));
}
.step-card:last-child .step-line {
  display: none;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary), #3a6ff0);
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -100%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15), transparent 70%);
}
.cta-content h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
}
.cta-content p {
  font-size: 16px;
  opacity: 0.9;
  max-width: 480px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 840px;
  margin: 48px auto 0;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item summary {
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  user-select: none;
  transition: background 0.3s;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  font-size: 26px;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item[open] summary {
  background: var(--primary-light);
}
.faq-item .faq-answer {
  padding: 0 28px 24px;
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.9;
}

/* ===== Footer ===== */
.site-footer {
  background: #0d1b3e;
  color: rgba(255, 255, 255, 0.75);
  padding: 72px 0 0;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .logo-text {
  color: #fff;
  font-size: 22px;
}
.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 280px;
}
.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: all 0.3s;
}
.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-subscribe p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 16px;
}
.footer-subscribe form {
  display: flex;
  gap: 8px;
}
.footer-subscribe input {
  flex: 1;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 12px 18px;
  border-radius: 100px;
  color: #fff;
}
.footer-subscribe input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}
.footer-subscribe button {
  background: var(--primary);
  color: #fff;
  padding: 12px 24px;
  border-radius: 100px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
  white-space: nowrap;
}
.footer-subscribe button:hover {
  background: var(--primary-dark);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
}
.footer-bottom a:hover {
  color: #fff;
}
.footer-bottom .domain {
  font-family: monospace;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .feature-grid,
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .info-split {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .news-wrap {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}
@media (max-width: 768px) {
  :root {
    --spacing-section: 64px;
  }
  .header-top {
    height: 64px;
  }
  .search-box {
    display: none;
  }
  .header-cta {
    display: none;
  }
  .channel-nav {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .mobile-panel.open {
    display: block;
  }
  .hero {
    padding: 100px 0 80px;
  }
  .hero-title {
    font-size: 36px;
  }
  .hero-desc {
    font-size: 16px;
  }
  .hero-metrics {
    gap: 24px;
    flex-wrap: wrap;
  }
  .section-title {
    font-size: 28px;
  }
  .cta-section {
    flex-direction: column;
    padding: 48px 32px;
    text-align: center;
  }
  .cta-actions {
    flex-wrap: wrap;
    justify-content: center;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .feature-grid,
  .category-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero-title {
    font-size: 30px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .btn {
    text-align: center;
  }
  .section-title {
    font-size: 24px;
  }
  .footer-subscribe form {
    flex-direction: column;
  }
  .footer-subscribe button {
    width: 100%;
  }
  .news-item {
    padding: 20px;
  }
}

/* roulang page: article */
:root {
    --primary: #0b2545;
    --primary-light: #13315c;
    --primary-dark: #081b33;
    --accent: #e8a04a;
    --accent-dark: #c47f2e;
    --accent-soft: #fdf0df;
    --bg: #f4f6f9;
    --bg-white: #ffffff;
    --bg-muted: #eef1f5;
    --text: #1e293b;
    --text-weak: #5b6b7f;
    --border: #e2e8f0;
    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 30px rgba(0,0,0,0.07);
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
    --transition: all 0.25s ease;
    --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-main);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}
button {
    font-family: inherit;
    border: none;
    cursor: pointer;
}
input {
    font-family: inherit;
    outline: none;
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-white);
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.header-top {
    border-bottom: 1px solid var(--border);
    background: var(--bg-white);
}
.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 800;
    box-shadow: 0 6px 16px rgba(11, 37, 69, 0.24);
}
.logo-text {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.header-search {
    display: flex;
    align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 6px 6px 6px 16px;
    transition: var(--transition);
}
.header-search:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(232, 160, 74, 0.12);
    background: var(--bg-white);
}
.header-search input {
    border: none;
    background: transparent;
    font-size: 14px;
    color: var(--text);
    width: 180px;
}
.header-search button {
    background: var(--accent);
    color: #fff;
    border-radius: 50px;
    padding: 8px 18px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}
.header-search button:hover {
    background: var(--accent-dark);
}
.channel-nav {
    background: var(--bg-white);
}
.channel-list {
    display: flex;
    gap: 4px;
    padding: 8px 0;
}
.channel-list a {
    display: inline-block;
    padding: 10px 22px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-weak);
    transition: var(--transition);
}
.channel-list a:hover {
    color: var(--primary);
    background: var(--bg-muted);
}
.channel-list a.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 18px rgba(11, 37, 69, 0.2);
}
.article-hero {
    position: relative;
    padding: 80px 0 110px;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: #fff;
}
.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(11, 37, 69, 0.92) 20%, rgba(11, 37, 69, 0.65) 60%, rgba(19, 49, 92, 0.55) 100%);
}
.article-hero .container {
    position: relative;
    z-index: 2;
}
.breadcrumb {
    font-size: 14px;
    margin-bottom: 18px;
    color: rgba(255,255,255,0.72);
    display: flex;
    gap: 10px;
    align-items: center;
}
.breadcrumb a:hover {
    color: var(--accent);
}
.article-hero h1 {
    font-size: 40px;
    line-height: 1.3;
    font-weight: 800;
    max-width: 860px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}
.article-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    font-size: 15px;
    color: rgba(255,255,255,0.85);
}
.article-hero-meta .meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.article-hero-meta .badge {
    background: rgba(255,255,255,0.16);
    backdrop-filter: blur(6px);
    padding: 5px 16px;
    border-radius: 50px;
    font-size: 14px;
    border: 1px solid rgba(255,255,255,0.2);
}
.article-main {
    padding-bottom: 60px;
}
.article-layout {
    display: grid;
    grid-template-columns: 1fr 330px;
    gap: 36px;
    margin-top: -50px;
    position: relative;
    z-index: 5;
    align-items: start;
}
.article-body-wrap {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.6);
}
.article-body {
    padding: 44px 48px;
}
.article-body .lead {
    font-size: 18px;
    line-height: 1.9;
    color: var(--text-weak);
    border-left: 4px solid var(--accent);
    padding-left: 20px;
    margin-bottom: 30px;
    background: var(--bg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 18px 22px;
    font-weight: 500;
}
.article-content {
    font-size: 16px;
    line-height: 1.9;
    color: #263446;
}
.article-content h2 {
    font-size: 26px;
    font-weight: 800;
    margin: 40px 0 18px;
    color: var(--primary);
}
.article-content h3 {
    font-size: 21px;
    font-weight: 700;
    margin: 30px 0 14px;
    color: var(--primary-light);
}
.article-content p {
    margin-bottom: 22px;
}
.article-content ul,
.article-content ol {
    margin: 20px 0 24px 24px;
}
.article-content li {
    margin-bottom: 10px;
}
.article-content blockquote {
    border-left: 5px solid var(--accent);
    background: var(--accent-soft);
    padding: 20px 24px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: 28px 0;
    font-size: 16px;
    color: var(--primary-dark);
}
.article-content img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin: 28px 0;
}
.article-content a {
    color: var(--primary);
    font-weight: 600;
    border-bottom: 2px solid var(--accent);
}
.article-content a:hover {
    color: var(--accent-dark);
}
.article-footer-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    border-top: 1px solid var(--border);
    margin-top: 36px;
    padding-top: 24px;
}
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.tag-list .tag {
    display: inline-block;
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 14px;
    color: var(--text-weak);
    transition: var(--transition);
}
.tag-list .tag:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.share-box {
    display: flex;
    align-items: center;
    gap: 10px;
}
.share-box span {
    font-size: 14px;
    color: var(--text-weak);
}
.share-box a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    color: var(--text-weak);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.share-box a:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-3px);
}
.not-found {
    text-align: center;
    padding: 80px 20px;
}
.not-found i {
    font-size: 64px;
    color: var(--border);
    margin-bottom: 20px;
}
.not-found h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 14px;
}
.not-found p {
    color: var(--text-weak);
    margin-bottom: 28px;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 30px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 700;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 8px 20px rgba(11, 37, 69, 0.24);
}
.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(11, 37, 69, 0.3);
}
.btn-accent {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 8px 20px rgba(232, 160, 74, 0.3);
}
.btn-accent:hover {
    background: var(--accent-dark);
    transform: translateY(-3px);
    box-shadow: 0 14px 30px rgba(232, 160, 74, 0.36);
}
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 160px;
}
.sidebar-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}
.sidebar-card h3 {
    font-size: 17px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.sidebar-card h3::after {
    content: '';
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
}
.sidebar-card .info-list {
    list-style: none;
}
.sidebar-card .info-list li {
    padding: 12px 0;
    border-bottom: 1px dashed var(--border);
    font-size: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.sidebar-card .info-list li:last-child {
    border-bottom: none;
}
.sidebar-card .info-list .label {
    color: var(--text-weak);
    font-size: 13px;
}
.sidebar-card .info-list .value {
    font-weight: 600;
    color: var(--primary);
}
.guide-list {
    list-style: none;
}
.guide-list li {
    padding: 12px 0;
    border-bottom: 1px dashed var(--border);
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    display: flex;
    align-items: flex-start;
    gap: 12px;
    transition: var(--transition);
}
.guide-list li:last-child {
    border-bottom: none;
}
.guide-list li i {
    color: var(--accent);
    margin-top: 5px;
    font-size: 13px;
}
.guide-list li a:hover {
    color: var(--primary);
}
.sidebar-mini-card {
    display: flex;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px dashed var(--border);
    align-items: center;
}
.sidebar-mini-card:last-child {
    border-bottom: none;
    padding-bottom: 0;
}
.sidebar-mini-card img {
    width: 76px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}
.sidebar-mini-card a {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.sidebar-mini-card a:hover {
    color: var(--accent-dark);
}
.section {
    padding: 80px 0;
}
.section-head {
    text-align: center;
    margin-bottom: 50px;
}
.section-tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent-dark);
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 14px;
    letter-spacing: 1px;
}
.section-title {
    font-size: 34px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}
.section-subtitle {
    font-size: 16px;
    color: var(--text-weak);
    max-width: 640px;
    margin: 0 auto;
}
.recommend-section {
    background: var(--bg-white);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.recommend-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.recommend-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.recommend-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.recommend-card .card-media {
    position: relative;
    height: 180px;
    overflow: hidden;
}
.recommend-card .card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.recommend-card:hover .card-media img {
    transform: scale(1.06);
}
.recommend-card .card-media::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(11, 37, 69, 0.2));
}
.recommend-card .card-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(255,255,255,0.92);
    color: var(--primary);
    padding: 5px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
    z-index: 2;
    box-shadow: var(--shadow-sm);
}
.recommend-card .card-body {
    padding: 22px;
}
.recommend-card .card-body h3 {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.55;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 50px;
}
.recommend-card .card-body a:hover {
    color: var(--accent-dark);
}
.recommend-card .card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-weak);
}
.category-section {
    background: var(--bg-muted);
}
.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.category-item {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.category-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}
.category-item:hover::before {
    transform: scaleX(1);
}
.category-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}
.category-item i {
    font-size: 32px;
    color: var(--primary);
    width: 68px;
    height: 68px;
    background: var(--bg-muted);
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    transition: var(--transition);
}
.category-item:hover i {
    background: var(--primary);
    color: #fff;
}
.category-item h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--primary);
}
.category-item p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.6;
}
.faq-section {
    background: var(--bg-white);
}
.faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.faq-item {
    background: var(--bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}
.faq-item details {
    padding: 0;
}
.faq-item summary {
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--primary);
    transition: var(--transition);
}
.faq-item summary::-webkit-details-marker {
    display: none;
}
.faq-item summary i {
    color: var(--accent);
    font-size: 18px;
}
.faq-item summary::after {
    content: '+';
    margin-left: auto;
    font-size: 22px;
    color: var(--accent);
    font-weight: 700;
    transition: var(--transition);
}
.faq-item details[open] summary::after {
    content: '−';
    transform: rotate(180deg);
    color: var(--primary);
}
.faq-item .faq-answer {
    padding: 0 28px 24px 58px;
    font-size: 15px;
    color: var(--text-weak);
    line-height: 1.8;
}
.cta-section {
    position: relative;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding: 100px 0;
    color: #fff;
    text-align: center;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(11, 37, 69, 0.9), rgba(19, 49, 92, 0.84));
}
.cta-section .container {
    position: relative;
    z-index: 2;
}
.cta-section h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.cta-section p {
    font-size: 17px;
    color: rgba(255,255,255,0.85);
    max-width: 620px;
    margin: 0 auto 36px;
}
.cta-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.site-footer {
    background: var(--primary-dark);
    padding: 64px 0 32px;
    color: rgba(255,255,255,0.82);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.4fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 32px;
}
.footer-brand .logo-text {
    color: #fff;
    -webkit-text-fill-color: #fff;
    background: none;
}
.footer-brand .logo-icon {
    background: var(--accent);
    color: var(--primary-dark);
}
.footer-brand p {
    margin-top: 18px;
    font-size: 15px;
    line-height: 1.9;
    color: rgba(255,255,255,0.6);
    max-width: 320px;
}
.footer-title {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 22px;
    position: relative;
    padding-bottom: 12px;
}
.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 32px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
}
.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 15px;
    transition: var(--transition);
}
.footer-links a:hover {
    color: var(--accent);
    padding-left: 6px;
}
.footer-brand p,
.site-footer p {
    color: rgba(255,255,255,0.6);
}
.site-footer input[type="email"] {
    width: 100%;
    padding: 14px 18px;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.08);
    color: #fff;
    font-size: 14px;
    margin-bottom: 12px;
}
.site-footer input[type="email"]::placeholder {
    color: rgba(255,255,255,0.4);
}
.site-footer form button {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: var(--primary-dark);
    border-radius: var(--radius-sm);
    font-weight: 800;
    font-size: 15px;
    transition: var(--transition);
}
.site-footer form button:hover {
    background: #f0b061;
    transform: translateY(-2px);
}
.footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 14px;
    color: rgba(255,255,255,0.42);
    align-items: center;
}
.footer-bottom .domain {
    color: var(--accent);
    font-weight: 600;
}
@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
        margin-top: -35px;
    }
    .article-sidebar {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
    }
    .sidebar-card {
        flex: 1 1 calc(33.333% - 16px);
        min-width: 220px;
    }
    .recommend-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 768px) {
    .article-hero {
        padding: 60px 0 90px;
        background-attachment: scroll;
    }
    .article-hero h1 {
        font-size: 30px;
    }
    .article-body {
        padding: 30px 24px;
    }
    .article-layout {
        gap: 20px;
    }
    .container {
        padding: 0 18px;
    }
    .header-row {
        height: 60px;
    }
    .header-search {
        display: none;
    }
    .logo-text {
        font-size: 18px;
    }
    .logo-icon {
        width: 38px;
        height: 38px;
        font-size: 18px;
    }
    .channel-list {
        gap: 2px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .channel-list::-webkit-scrollbar {
        display: none;
    }
    .channel-list a {
        white-space: nowrap;
        padding: 9px 18px;
        font-size: 14px;
    }
    .section-title {
        font-size: 27px;
    }
    .section {
        padding: 60px 0;
    }
    .cta-section {
        padding: 70px 0;
        background-attachment: scroll;
    }
    .cta-section h2 {
        font-size: 27px;
    }
    .faq-item summary {
        padding: 18px 20px;
        font-size: 15px;
    }
    .faq-item .faq-answer {
        padding: 0 20px 20px 44px;
        font-size: 14px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}
@media (max-width: 520px) {
    .article-body {
        padding: 22px 18px;
    }
    .article-hero h1 {
        font-size: 24px;
    }
    .article-hero-meta {
        gap: 12px;
    }
    .recommend-grid {
        grid-template-columns: 1fr;
    }
    .category-grid {
        grid-template-columns: 1fr;
    }
    .article-footer-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    .share-box {
        width: 100%;
    }
    .btn {
        padding: 12px 22px;
        font-size: 15px;
    }
    .sidebar-card {
        flex: 1 1 100%;
    }
}

/* roulang page: category1 */
:root {
  --color-primary: #1E3A5F;
  --color-primary-light: #2D5A87;
  --color-primary-dark: #152436;
  --color-accent: #C9A96A;
  --color-accent-dark: #B18E4F;
  --color-bg: #F4F6F9;
  --color-surface: #FFFFFF;
  --color-dark-bg: #122033;
  --color-text: #182538;
  --color-text-light: #5C6B7E;
  --color-border: #DDE4EC;
  --color-white: #FFFFFF;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(24, 37, 56, .06);
  --shadow-md: 0 8px 28px rgba(24, 37, 56, .09);
  --shadow-lg: 0 18px 50px rgba(24, 37, 56, .12);
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 32px;
  --space-lg: 64px;
  --space-xl: 88px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
input { font-family: inherit; }

.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  box-shadow: 0 2px 12px rgba(24, 37, 56, .06);
}
.header-top {
  border-bottom: 1px solid var(--color-border);
}
.header-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-white);
  border-radius: 10px;
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
}
.logo-text {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--color-text);
  white-space: nowrap;
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 18px;
}
.header-note {
  font-size: 13px;
  color: var(--color-text-light);
  letter-spacing: 1px;
}
.channel-nav {
  background: var(--color-surface);
}
.channel-list {
  display: flex;
  gap: 4px;
  padding: 0 2px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.channel-list::-webkit-scrollbar { display: none; }
.channel-list a {
  flex-shrink: 0;
  padding: 14px 22px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-light);
  border-bottom: 3px solid transparent;
  transition: color .2s, border-color .2s;
}
.channel-list a:hover {
  color: var(--color-primary);
}
.channel-list a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all .25s;
}
.btn:focus-visible, a:focus-visible, input:focus-visible {
  outline: 3px solid rgba(201, 169, 106, .5);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn-primary:hover {
  background: var(--color-primary-light);
  box-shadow: 0 6px 20px rgba(30, 58, 95, .25);
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}
.btn-accent:hover {
  background: var(--color-accent-dark);
  color: var(--color-white);
  box-shadow: 0 6px 20px rgba(201, 169, 106, .35);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-white);
}
.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 6px;
}

/* ===== Banner ===== */
.page-banner {
  position: relative;
  padding: 96px 0 88px;
  background: linear-gradient(135deg, rgba(21, 36, 54, .94) 0%, rgba(30, 58, 95, .85) 60%, rgba(45, 90, 135, .75) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: var(--color-white);
  text-align: center;
}
.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
  margin-bottom: 24px;
  background: rgba(255, 255, 255, .1);
  border-radius: 30px;
  padding: 6px 18px;
  backdrop-filter: blur(6px);
}
.breadcrumb a {
  color: rgba(255, 255, 255, .8);
}
.breadcrumb a:hover {
  color: var(--color-accent);
}
.breadcrumb-sep {
  opacity: .5;
}
.banner-title {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
  letter-spacing: 2px;
}
.banner-desc {
  font-size: 18px;
  max-width: 720px;
  margin: 0 auto 26px;
  color: rgba(255, 255, 255, .82);
  line-height: 1.7;
}
.banner-badges {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .18);
  color: var(--color-white);
  padding: 5px 16px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 500;
  backdrop-filter: blur(4px);
}
.badge-light {
  background: rgba(30, 58, 95, .08);
  color: var(--color-primary);
  border: none;
}

/* ===== Section Common ===== */
.section-padding {
  padding: var(--space-xl) 0;
}
.intro-section { background: var(--color-surface); }
.cards-section { background: var(--color-bg); }
.news-section { background: var(--color-surface); }
.steps-section { background: linear-gradient(135deg, #152436 0%, #1E3A5F 100%); color: var(--color-white); }
.faq-section { background: var(--color-bg); }
.cta-section { background: linear-gradient(135deg, #152436 0%, #1E3A5F 60%, #2D5A87 100%); color: var(--color-white); }

.section-heading {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}
.section-label {
  display: inline-block;
  background: rgba(30, 58, 95, .08);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 16px;
  border-radius: 30px;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.section-heading h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 14px;
}
.section-heading p {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===== Intro ===== */
.intro-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 56px;
  align-items: center;
}
.intro-text h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 16px;
}
.intro-text > p {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 14px;
}
.intro-points {
  margin: 24px 0 30px;
}
.intro-points li {
  position: relative;
  list-style: none;
  font-size: 15px;
  padding: 7px 0 7px 28px;
  color: var(--color-text);
}
.intro-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(201, 169, 106, .25);
  border: 3px solid var(--color-accent);
}
.intro-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.metric-card {
  background: #F9FAFC;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  padding: 30px 14px;
  transition: box-shadow .3s, transform .3s;
}
.metric-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-3px);
}
.metric-num {
  font-size: 34px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}
.metric-label {
  font-size: 14px;
  color: var(--color-text-light);
  margin-top: 8px;
  display: block;
}

/* ===== Cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.guide-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
}
.guide-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.card-image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.guide-card:hover .card-image img {
  transform: scale(1.05);
}
.card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(30, 58, 95, .82);
  color: var(--color-white);
  padding: 4px 14px;
  border-radius: 30px;
  font-size: 12px;
  font-weight: 500;
  backdrop-filter: blur(4px);
}
.card-body {
  padding: 22px 24px 26px;
}
.card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}
.card-body p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.65;
  margin-bottom: 16px;
}
.card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color .2s;
}
.card-link::after {
  content: '→';
  transition: transform .25s;
}
.card-link:hover {
  color: var(--color-accent-dark);
}
.card-link:hover::after {
  transform: translateX(4px);
}

/* ===== News ===== */
.news-list {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 26px 30px;
  border-bottom: 1px solid var(--color-border);
  transition: background .2s;
}
.news-item:last-child { border-bottom: none; }
.news-item:hover { background: #F9FAFC; }
.news-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 10px;
  padding: 8px 6px;
  flex-shrink: 0;
}
.news-day {
  font-size: 20px;
  font-weight: 800;
  line-height: 1.2;
}
.news-month {
  font-size: 12px;
  opacity: .85;
}
.news-content {
  flex: 1;
}
.news-content h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.4;
}
.news-content h3 a {
  color: var(--color-text);
  transition: color .2s;
}
.news-content h3 a:hover {
  color: var(--color-primary);
}
.news-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.65;
  margin-bottom: 8px;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.news-views {
  font-size: 13px;
  color: var(--color-text-light);
}

/* ===== Steps ===== */
.steps-section .section-heading h2 {
  color: var(--color-white);
}
.steps-section .section-heading p {
  color: rgba(255, 255, 255, .65);
}
.steps-section .section-label {
  background: rgba(255, 255, 255, .15);
  color: var(--color-accent);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-card {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  text-align: center;
  backdrop-filter: blur(8px);
  transition: background .3s, transform .3s;
}
.step-card:hover {
  background: rgba(255, 255, 255, .16);
  transform: translateY(-4px);
}
.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 4px 16px rgba(201, 169, 106, .35);
}
.step-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-white);
}
.step-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, .7);
  line-height: 1.6;
  margin: 0;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow .25s;
}
.faq-item:hover {
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  cursor: pointer;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: color .2s;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 24px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform .3s;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item[open] summary {
  color: var(--color-primary);
}
.faq-answer {
  padding: 0 24px 22px;
  color: var(--color-text-light);
  font-size: 15px;
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-inner {
  text-align: center;
  max-width: 660px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.cta-inner > p {
  font-size: 16px;
  color: rgba(255, 255, 255, .75);
  margin-bottom: 32px;
  line-height: 1.7;
}
.cta-form {
  display: flex;
  gap: 12px;
  max-width: 500px;
  margin: 0 auto;
  padding: 6px;
  background: rgba(255, 255, 255, .1);
  border-radius: 50px;
  border: 1px solid rgba(255, 255, 255, .15);
}
.cta-form input {
  flex: 1;
  padding: 12px 20px;
  border: none;
  background: transparent;
  color: var(--color-white);
  font-size: 15px;
  outline: none;
  min-width: 0;
}
.cta-form input::placeholder {
  color: rgba(255, 255, 255, .5);
}
.cta-form .btn {
  border-radius: 40px;
  flex-shrink: 0;
}
.cta-note {
  margin-top: 18px;
  font-size: 13px;
  color: rgba(255, 255, 255, .5);
  letter-spacing: 1px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-dark-bg);
  color: rgba(255, 255, 255, .65);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
}
.site-footer .logo-text {
  color: var(--color-white);
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  margin-top: 16px;
  max-width: 320px;
}
.footer-title {
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}
.footer-links {
  list-style: none;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: rgba(255, 255, 255, .6);
  font-size: 14px;
  transition: color .2s;
}
.footer-links a:hover {
  color: var(--color-accent);
}
.footer-sub p {
  font-size: 14px;
  margin-bottom: 14px;
}
.site-footer form {
  display: flex;
  margin-top: 14px;
}
.site-footer input[type="email"] {
  flex: 1;
  padding: 10px 16px;
  border: none;
  border-radius: 8px 0 0 8px;
  font-size: 14px;
  outline: none;
  background: rgba(255, 255, 255, .1);
  color: var(--color-white);
  min-width: 0;
}
.site-footer input[type="email"]::placeholder {
  color: rgba(255, 255, 255, .4);
}
.site-footer button[type="submit"] {
  padding: 10px 18px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  border: none;
  border-radius: 0 8px 8px 0;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s, color .2s;
}
.site-footer button[type="submit"]:hover {
  background: var(--color-accent-dark);
  color: var(--color-white);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: 13px;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom .domain {
  color: rgba(255, 255, 255, .5);
  transition: color .2s;
}
.footer-bottom .domain:hover {
  color: var(--color-accent);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
  .intro-grid { grid-template-columns: 1fr; gap: 36px; }
  .banner-title { font-size: 34px; }
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .header-note { display: none; }
  .page-banner { padding: 68px 0 60px; }
  .banner-title { font-size: 28px; }
  .banner-desc { font-size: 16px; }
  .section-heading h2 { font-size: 26px; }
  .intro-metrics { grid-template-columns: repeat(3, 1fr); }
  .metric-num { font-size: 26px; }
  .news-item { flex-direction: row; padding: 20px; gap: 14px; }
  .news-date { min-width: 46px; }
  .news-content h3 { font-size: 15px; }
  .cta-form { flex-direction: column; border-radius: 16px; padding: 16px; }
  .cta-form .btn { width: 100%; border-radius: 8px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .card-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .intro-metrics { grid-template-columns: 1fr; }
  .channel-list a { padding: 12px 16px; font-size: 14px; }
  .logo-text { font-size: 17px; letter-spacing: 1px; }
  .banner-title { font-size: 24px; }
  .banner-desc { font-size: 15px; }
  .section-heading h2 { font-size: 23px; }
  .news-item { flex-direction: column; align-items: flex-start; }
  .news-date { flex-direction: row; gap: 4px; padding: 4px 12px; border-radius: 30px; }
  .metric-card { padding: 22px 12px; }
}