/* roulang page: index */
:root {
  --color-primary: #3B82F6;
  --color-primary-dark: #2563EB;
  --color-primary-darker: #1D4ED8;
  --color-accent: #14B8A6;
  --color-warn: #F59E0B;
  --color-bg: #F8FAFC;
  --color-white: #FFFFFF;
  --color-text: #1E293B;
  --color-text-secondary: #64748B;
  --color-text-muted: #94A3B8;
  --color-border: #E2E8F0;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input { font-family: inherit; }
kbd {
  font-family: inherit;
  font-size: 12px;
  background: #F1F5F9;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  padding: 2px 8px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

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

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-darker) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
}

.logo-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo-sub {
  display: block;
  font-size: 10px;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin-top: -2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 16px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all 0.25s ease;
  position: relative;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-50, #EFF6FF);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  background: #F8FAFC;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 14px;
  gap: 8px;
  width: 220px;
  transition: all 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  background: #fff;
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  width: 100%;
  color: var(--color-text);
}

.search-box i {
  color: var(--color-text-muted);
  font-size: 14px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: 16px;
  transition: all 0.25s ease;
  position: relative;
}

.icon-btn:hover {
  background: #F1F5F9;
  color: var(--color-primary);
}

.icon-btn .badge-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 7px;
  height: 7px;
  background: var(--color-warn);
  border-radius: 50%;
  border: 2px solid #fff;
}

/* 按钮系统 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease;
  white-space: nowrap;
  border: none;
  cursor: pointer;
  line-height: 1.4;
}

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

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--color-primary-darker);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

.btn-outline {
  background: #fff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

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

.btn-lg {
  padding: 14px 34px;
  font-size: 16px;
  border-radius: 12px;
}

.btn-sm {
  padding: 6px 16px;
  font-size: 13px;
  border-radius: 8px;
}

.btn-block {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  background: #F8FAFC;
  border: 1px solid var(--color-border);
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉 */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100vh;
  background: #fff;
  z-index: 200;
  padding: 80px 24px 24px;
  box-shadow: -8px 0 30px rgba(0,0,0,0.08);
  transition: right 0.35s ease;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mobile-drawer.open {
  right: 0;
}

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  z-index: 190;
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s ease;
}

.drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer .drawer-search {
  margin-bottom: 12px;
  width: 100%;
}

.mobile-drawer .nav-link {
  font-size: 17px;
  padding: 12px 12px;
  border-radius: 10px;
  display: block;
}

.mobile-drawer .btn {
  margin-top: auto;
}

.drawer-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--color-text-secondary);
  font-size: 18px;
  background: #F8FAFC;
}

.drawer-close:hover {
  background: #F1F5F9;
  color: var(--color-primary);
}

/* ========== 倒计时条 ========== */
.countdown-bar {
  background: linear-gradient(90deg, #EFF6FF 0%, #DBEAFE 100%);
  border-bottom: 1px solid #BFDBFE;
  position: relative;
  z-index: 10;
}

.countdown-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  padding-bottom: 8px;
  gap: 12px;
  flex-wrap: wrap;
}

.countdown-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.countdown-label {
  display: inline-flex;
  align-items: center;
  background: var(--color-warn);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.03em;
}

.countdown-timer {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

.countdown-timer .num {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 2px 6px;
  font-weight: 700;
  font-size: 14px;
  color: var(--color-primary-dark);
  min-width: 28px;
  text-align: center;
}

.countdown-action {
  color: var(--color-primary-darker);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.25s ease;
}

.countdown-action:hover {
  gap: 10px;
  color: var(--color-primary);
}

/* ========== Hero ========== */
.hero {
  background: linear-gradient(180deg, #EFF6FF 0%, #F8FAFC 100%);
  position: relative;
  overflow: hidden;
  padding: 100px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('data:image/svg+xml,%3Csvg width="40" height="40" viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M0 0h1v40H0zM40 0h1v40H40zM20 20h1v40h-1zM0 20h40v1H0z" fill="%233B82F6" fill-opacity="0.03"/%3E%3C/svg%3E');
  pointer-events: none;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 64px;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1.1;
}

.hero h1 {
  font-size: 40px;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary-darker);
  margin-bottom: 12px;
  line-height: 1.5;
}

.hero-desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.hero-meta i {
  color: var(--color-accent);
  font-size: 15px;
}

.hero-image {
  flex: 0.9;
  position: relative;
}

.hero-img-wrap {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(37, 99, 235, 0.15);
  position: relative;
}

.hero-img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(30, 41, 59, 0.08) 0%, transparent 30%);
}

.hero-img-wrap img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.hero-badge-card {
  position: absolute;
  bottom: 24px;
  left: -20px;
  background: #fff;
  border-radius: 14px;
  padding: 14px 20px;
  box-shadow: var(--shadow-hover);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
}

.hero-badge-card .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: #EFF6FF;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 18px;
}

.hero-badge-card .text strong {
  display: block;
  font-size: 15px;
  color: var(--color-text);
}

.hero-badge-card .text span {
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* ========== 卖点区 ========== */
.features {
  padding: 96px 0;
  background: #fff;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  background: #EFF6FF;
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 12px;
}

.section-header p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.feature-card:hover::before {
  opacity: 1;
}

.feature-card-wide {
  grid-column: span 7;
}

.feature-card-narrow {
  grid-column: span 5;
}

.feature-card .f-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #EFF6FF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

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

.feature-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.feature-card .f-arrow {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 18px;
  color: var(--color-text-muted);
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.3s ease;
}

.feature-card:hover .f-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--color-primary);
}

/* ========== 图墙区 ========== */
.gallery-section {
  padding: 96px 0;
  background: var(--color-bg);
}

.masonry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 110px;
  gap: 20px;
  grid-auto-flow: dense;
}

.masonry-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  display: block;
  cursor: pointer;
  box-shadow: var(--shadow-card);
}

.masonry-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.masonry-item:hover img {
  transform: scale(1.03);
}

.masonry-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.35) 0%, rgba(255,255,255,0) 55%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.masonry-item:hover::after {
  opacity: 1;
}

.masonry-item .m-tag {
  position: absolute;
  bottom: 12px;
  left: 14px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.35s ease;
  z-index: 2;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.masonry-item:hover .m-tag {
  opacity: 1;
  transform: translateY(0);
}

.masonry-item .m-arrow {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--color-text);
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s ease;
  z-index: 2;
}

.masonry-item:hover .m-arrow {
  opacity: 1;
  transform: scale(1);
}

.masonry-item:nth-child(1) { grid-column: span 2; grid-row: span 2; }
.masonry-item:nth-child(2) { grid-column: span 1; grid-row: span 2; }
.masonry-item:nth-child(3) { grid-column: span 1; grid-row: span 1; }
.masonry-item:nth-child(4) { grid-column: span 1; grid-row: span 1; }
.masonry-item:nth-child(5) { grid-column: span 2; grid-row: span 1; }
.masonry-item:nth-child(6) { grid-column: span 1; grid-row: span 2; }
.masonry-item:nth-child(7) { grid-column: span 1; grid-row: span 1; }
.masonry-item:nth-child(8) { grid-column: span 1; grid-row: span 1; }

/* ========== CTA 区 ========== */
.cta-section {
  padding: 72px 0;
  background: linear-gradient(135deg, #EFF6FF 0%, #F0FDFA 100%);
}

.cta-inner {
  background: #fff;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  text-align: center;
  padding: 56px 40px;
  position: relative;
  overflow: hidden;
}

.cta-inner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.cta-inner h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.cta-inner > p {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.cta-note {
  font-size: 13px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.cta-note i {
  color: var(--color-accent);
}

/* ========== FAQ ========== */
.faq-section {
  padding: 96px 0;
  background: #fff;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item.open {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease;
}

.faq-question .q-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #EFF6FF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.faq-item.open .faq-question .q-icon {
  background: var(--color-primary);
  color: #fff;
}

.faq-question .q-arrow {
  margin-left: auto;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: transform 0.35s ease;
  flex-shrink: 0;
}

.faq-item.open .faq-question .q-arrow {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 20px 18px 60px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  background: transparent;
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

/* ========== 资讯区 ========== */
.news-section {
  padding: 96px 0;
  background: var(--color-bg);
}

.news-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.news-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--color-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.news-card:hover::before {
  opacity: 1;
}

.news-thumb {
  width: 120px;
  height: 80px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
}

.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.news-card:hover .news-thumb img {
  transform: scale(1.05);
}

.news-info {
  flex: 1;
  min-width: 0;
}

.news-info h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
  transition: color 0.25s ease;
}

.news-card:hover .news-info h3 {
  color: var(--color-primary);
}

.news-info p {
  font-size: 14px;
  color: var(--color-text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.6;
  margin-bottom: 8px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--color-text-muted);
}

.news-cat {
  display: inline-flex;
  align-items: center;
  background: #EFF6FF;
  color: var(--color-primary);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.news-arrow {
  font-size: 20px;
  color: var(--color-text-muted);
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.news-card:hover .news-arrow {
  color: var(--color-primary);
  transform: translateX(4px);
}

.news-empty {
  text-align: center;
  padding: 48px 20px;
  background: #fff;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.news-empty .empty-icon {
  font-size: 40px;
  display: block;
  margin-bottom: 12px;
  opacity: 0.4;
}

.news-empty p {
  font-size: 15px;
  color: var(--color-text-secondary);
}

/* ========== 页脚 ========== */
.site-footer {
  background: #1E293B;
  color: #94A3B8;
  padding: 64px 0 0;
  margin-top: 0;
}

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

.footer-brand .footer-logo {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: #94A3B8;
  padding: 4px 0;
  transition: color 0.25s ease;
}

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

.footer-col p {
  font-size: 14px;
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
}

/* ========== 其他 ========== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--color-text-secondary);
  box-shadow: var(--shadow-hover);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s ease;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

::selection {
  background: rgba(59, 130, 246, 0.2);
}

/* ========== 响应式 ========== */
@media (max-width: 1280px) {
  .hero-image .hero-img-wrap img {
    height: 380px;
  }
}

@media (max-width: 1024px) {
  .main-nav, .search-box, .icon-btn, .header-actions > .btn {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .hero-inner {
    flex-direction: column;
    gap: 40px;
  }
  .hero {
    padding: 64px 0 56px;
  }
  .hero-content {
    text-align: center;
    max-width: 640px;
  }
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-buttons {
    justify-content: center;
  }
  .hero-meta {
    justify-content: center;
  }
  .hero-badge-card {
    left: 20px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-card-wide {
    grid-column: span 2;
  }
  .feature-card-narrow {
    grid-column: span 1;
  }
  .masonry-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 30px;
  }
  .hero-subtitle {
    font-size: 17px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .hero-img-wrap img {
    height: 300px !important;
  }
  .section-header h2 {
    font-size: 24px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .feature-card-wide, .feature-card-narrow {
    grid-column: span 1;
  }
  .masonry-grid {
    grid-template-columns: 1fr;
  }
  .masonry-item:nth-child(n) {
    grid-column: span 1;
    grid-row: span 1;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .cta-inner {
    padding: 40px 24px;
  }
  .cta-inner h2 {
    font-size: 24px;
  }
  .faq-answer-inner {
    padding-left: 20px;
  }
  .countdown-inner {
    justify-content: center;
  }
  .countdown-left .days {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero {
    padding: 48px 0 40px;
  }
  .hero h1 {
    font-size: 26px;
  }
  .hero-buttons .btn {
    width: 100%;
  }
  .countdown-inner {
    flex-direction: column;
    text-align: center;
  }
  .countdown-action {
    margin-top: 4px;
  }
  .cta-buttons .btn {
    width: 100%;
  }
  .news-card {
    flex-direction: column;
    align-items: flex-start;
  }
  .news-thumb {
    width: 100%;
    height: 160px;
  }
  .news-arrow {
    display: none;
  }
  .back-to-top {
    bottom: 20px;
    right: 20px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #3B82F6;
            --primary-dark: #1D4ED8;
            --accent: #14B8A6;
            --ink: #1E293B;
            --sub: #64748B;
            --faint: #94A3B8;
            --bg: #F8FAFC;
            --white: #FFFFFF;
            --border: #E2E8F0;
            --radius: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--ink);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

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

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

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary) 0%, #2563EB 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(59, 130, 246, 0.3);
        }

        .logo-text {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: -0.01em;
            line-height: 1.2;
            color: var(--ink);
        }

        .logo-sub {
            display: block;
            font-size: 10px;
            font-weight: 500;
            color: var(--faint);
            letter-spacing: 0.2em;
            line-height: 1;
            margin-top: 2px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--sub);
            border-radius: 8px;
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(59, 130, 246, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(59, 130, 246, 0.10);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .command-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 7px 14px;
            width: 220px;
            transition: var(--transition);
        }

        .command-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
            background: var(--white);
        }

        .command-search i {
            color: var(--faint);
            font-size: 13px;
        }

        .search-input {
            flex: 1;
            font-size: 13.5px;
            color: var(--ink);
            background: transparent;
            min-width: 0;
        }

        .search-input::placeholder {
            color: var(--faint);
        }

        .search-kbd {
            font-size: 10px;
            color: var(--faint);
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 4px;
            padding: 2px 6px;
            font-weight: 600;
            white-space: nowrap;
        }

        .icon-btn {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--sub);
            font-size: 15px;
            border: 1px solid transparent;
            transition: var(--transition);
            cursor: pointer;
        }

        .icon-btn:hover {
            color: var(--primary);
            background: rgba(59, 130, 246, 0.08);
            border-color: rgba(59, 130, 246, 0.15);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 10px;
            padding: 12px 28px;
            transition: var(--transition);
            box-shadow: 0 2px 6px rgba(59, 130, 246, 0.25);
            cursor: pointer;
            border: none;
            line-height: 1.4;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(59, 130, 246, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 4px rgba(59, 130, 246, 0.2);
        }

        .btn-primary:focus-visible,
        .btn-secondary:focus-visible,
        .text-link:focus-visible,
        .nav-link:focus-visible,
        .icon-btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--white);
            color: var(--ink);
            font-size: 14px;
            font-weight: 600;
            border-radius: 10px;
            padding: 12px 28px;
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(59, 130, 246, 0.03);
        }

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

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        .header-cta {
            white-space: nowrap;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            background: var(--bg);
            cursor: pointer;
        }

        .hamburger span {
            width: 18px;
            height: 2px;
            background: var(--ink);
            border-radius: 2px;
            transition: var(--transition);
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            padding: 20px 24px 28px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
            z-index: 99;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu .container {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .mobile-menu .nav-link {
            padding: 12px 14px;
            font-size: 15px;
            border-radius: 10px;
        }

        .mobile-menu .nav-link.active {
            background: rgba(59, 130, 246, 0.1);
        }

        .mobile-menu .command-search {
            width: 100%;
            margin-bottom: 12px;
        }

        /* Hero */
        .hero {
            position: relative;
            padding: 96px 0 88px;
            background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 60%, #FFFFFF 100%);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(to bottom, rgba(239, 246, 255, 0.4) 0%, rgba(248, 250, 252, 0.7) 100%);
            pointer-events: none;
        }

        .hero-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 64px;
            align-items: center;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--faint);
            margin-bottom: 18px;
        }

        .breadcrumb a {
            transition: var(--transition);
        }

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

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

        .hero-title {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin-bottom: 20px;
            color: var(--ink);
        }

        .hero-title .highlight {
            color: var(--primary);
        }

        .hero-desc {
            font-size: 16.5px;
            line-height: 1.8;
            color: var(--sub);
            max-width: 540px;
            margin-bottom: 32px;
        }

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

        .hero-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(30, 41, 59, 0.12);
            transform: rotate(1deg);
            transition: var(--transition);
        }

        .hero-image:hover {
            transform: rotate(0deg) scale(1.01);
            box-shadow: 0 28px 56px rgba(30, 41, 59, 0.16);
        }

        .hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .hero-image-badge {
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            backdrop-filter: blur(4px);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-image-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
        }

        /* Section common */
        .section {
            padding: 96px 0;
        }

        .section-alt {
            background: var(--white);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(59, 130, 246, 0.08);
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--ink);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 15.5px;
            line-height: 1.8;
            color: var(--sub);
            max-width: 640px;
            margin-bottom: 48px;
        }

        /* Feature cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(59, 130, 246, 0.25);
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(59, 130, 246, 0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--ink);
        }

        .feature-card p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--sub);
        }

        .feature-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(20, 184, 166, 0.1);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 16px;
        }

        .step-item {
            position: relative;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

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

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, #2563EB 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
        }

        .step-item h3 {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 13px;
            line-height: 1.7;
            color: var(--sub);
        }

        /* Security section */
        .security-section {
            background: var(--white);
            position: relative;
            overflow: hidden;
        }

        .security-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.04);
        }

        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .security-item {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .security-item:hover {
            border-color: rgba(59, 130, 246, 0.3);
            background: var(--white);
            box-shadow: var(--shadow-hover);
        }

        .security-item .icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 16px;
            background: rgba(59, 130, 246, 0.1);
            color: var(--primary);
        }

        .security-item h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .security-item p {
            font-size: 13px;
            line-height: 1.7;
            color: var(--sub);
        }

        /* Scenario section */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scenario-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--white);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

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

        .scenario-card .card-img {
            height: 160px;
            overflow: hidden;
            position: relative;
        }

        .scenario-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .scenario-card:hover .card-img img {
            transform: scale(1.04);
        }

        .scenario-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(30, 41, 59, 0.2) 0%, transparent 50%);
        }

        .scenario-card .card-body {
            padding: 24px 24px 28px;
        }

        .scenario-card .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(20, 184, 166, 0.08);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
        }

        .scenario-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .scenario-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--sub);
        }

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

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: var(--white);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
        }

        .faq-q-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .faq-question h3 {
            flex: 1;
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
        }

        .faq-arrow {
            font-size: 13px;
            color: var(--faint);
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 22px 62px;
        }

        .faq-answer p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--sub);
            background: var(--bg);
            border-radius: 10px;
            padding: 16px 18px;
            border-left: 3px solid var(--primary);
        }

        /* CTA section */
        .cta-section {
            padding: 80px 0;
            position: relative;
            background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.06;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 14px;
            color: var(--ink);
        }

        .cta-desc {
            font-size: 15px;
            color: var(--sub);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .cta-btns {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .cta-note {
            margin-top: 18px;
            font-size: 13px;
            color: var(--faint);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }

        .cta-note i {
            color: var(--accent);
        }

        /* Footer */
        .site-footer {
            background: #1E293B;
            color: #CBD5E1;
            padding: 64px 0 0;
            border-top: 3px solid var(--primary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: #F1F5F9;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand p {
            font-size: 13.5px;
            line-height: 1.8;
            color: #94A3B8;
            max-width: 260px;
        }

        .footer-col h4 {
            color: #F1F5F9;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 13.5px;
            color: #94A3B8;
            padding: 5px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-col p {
            font-size: 13.5px;
            color: #94A3B8;
            padding: 5px 0;
            line-height: 1.6;
        }

        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, 0.15);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12.5px;
            color: #64748B;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .command-search {
                width: 160px;
            }
            .header-cta {
                display: none;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-image {
                max-width: 520px;
                margin: 0 auto;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .hero {
                padding: 40px 0 56px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .section-title {
                font-size: 24px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .security-grid {
                grid-template-columns: 1fr 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .header-inner {
                height: 60px;
            }
            .mobile-menu {
                top: 60px;
            }
            .command-search {
                display: none;
            }
            .icon-btn {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 480px) {
            .security-grid {
                grid-template-columns: 1fr;
            }
            .hero-btns .btn-primary,
            .hero-btns .btn-secondary {
                width: 100%;
            }
            .cta-btns .btn-primary,
            .cta-btns .btn-secondary {
                width: 100%;
            }
            .container {
                padding: 0 16px;
            }
        }

/* roulang page: article */
:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #EFF6FF;
    --accent: #14B8A6;
    --accent-light: #CCFBF1;
    --warning: #F59E0B;
    --bg: #F8FAFC;
    --surface: #FFFFFF;
    --text: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --border: #E2E8F0;
    --radius: 14px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
    --space-section: 96px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    margin: 0;
    -webkit-font-smoothing: antialiased;
    font-size: 16px;
  }
  a { color: inherit; text-decoration: none; }
  img { max-width: 100%; display: block; }
  button { font-family: inherit; }

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

  /* ========== Header / Nav ========== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: 72px;
  }
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
  }
  .brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }
  .brand-mark {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), #7C3AED);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 4px 12px rgba(37,99,235,0.25);
  }
  .brand-text {
    font-size: 19px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: 0.01em;
  }
  .brand-sub {
    font-size: 11px;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: 999px;
    background: #fff;
  }
  .main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
    padding: 0 16px;
  }
  .nav-link {
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: all 0.2s ease;
  }
  .nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
  }
  .nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
    font-weight: 700;
  }
  .header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }
  .search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 8px 14px;
    width: 220px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-muted);
  }
  .search-box:hover {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  }
  .search-box svg { flex-shrink: 0; }
  .search-box span { flex: 1; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .search-box kbd {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-size: 11px;
    padding: 1px 6px;
    color: var(--text-muted);
    font-family: inherit;
  }
  .icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    border: none;
    background: transparent;
    cursor: pointer;
  }
  .icon-btn:hover {
    background: var(--bg);
    color: var(--primary);
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    line-height: 1.4;
    transition: all 0.2s ease;
    white-space: nowrap;
  }
  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(37,99,235,0.28);
  }
  .btn-primary:active {
    transform: translateY(0px);
    box-shadow: none;
  }
  .btn-primary:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }
  .btn-sm {
    padding: 8px 20px;
    font-size: 14px;
    border-radius: 9px;
  }
  .mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    border-radius: 8px;
  }
  .mobile-toggle:hover { background: var(--bg); }
  .mobile-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  .mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 20px 24px 28px;
    z-index: 49;
    box-shadow: var(--shadow-hover);
  }
  .mobile-menu.open { display: block; }
  .mobile-search {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 16px;
    color: var(--text-muted);
    font-size: 14px;
  }
  .mobile-search svg { flex-shrink: 0; }
  .mobile-nav-link {
    display: block;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s ease;
  }
  .mobile-nav-link:hover {
    background: var(--primary-light);
    color: var(--primary);
  }
  .mobile-nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 700;
  }
  .mobile-cta {
    margin-top: 16px;
    width: 100%;
    justify-content: center;
  }

  /* ========== Breadcrumb ========== */
  .breadcrumb-wrap {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
  }
  .breadcrumb-inner {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
    font-size: 13px;
    color: var(--text-muted);
  }
  .breadcrumb-inner a {
    color: var(--text-secondary);
    transition: color 0.2s ease;
  }
  .breadcrumb-inner a:hover { color: var(--primary); }
  .breadcrumb-inner .sep { margin: 0 6px; color: var(--text-muted); }
  .breadcrumb-inner .current {
    color: var(--text);
    font-weight: 500;
    max-width: 320px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* ========== Article ========== */
  .article-wrap {
    padding: 48px 0 80px;
  }
  .article-card {
    max-width: 780px;
    margin: 0 auto;
    background: #fff;
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 48px 56px;
  }
  .article-header {
    margin-bottom: 32px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 28px;
  }
  .article-header h1 {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.4;
    margin: 0 0 20px;
    color: var(--text);
    letter-spacing: -0.01em;
  }
  .article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    color: var(--text-muted);
    font-size: 13px;
  }
  .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .meta-item svg { color: var(--text-muted); }
  .article-content {
    font-size: 16px;
    line-height: 1.85;
    letter-spacing: 0.02em;
    color: #334155;
    word-break: break-word;
  }
  .article-content p {
    margin: 0 0 22px;
  }
  .article-content h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
    margin: 36px 0 14px;
    line-height: 1.4;
  }
  .article-content h3 {
    font-size: 19px;
    font-weight: 600;
    color: var(--text);
    margin: 28px 0 12px;
    line-height: 1.5;
  }
  .article-content h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    margin: 24px 0 10px;
  }
  .article-content ul,
  .article-content ol {
    padding-left: 22px;
    margin: 0 0 22px;
  }
  .article-content ul li,
  .article-content ol li {
    margin-bottom: 8px;
  }
  .article-content ul li::marker { color: var(--primary); }
  .article-content blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 14px 20px;
    border-radius: 0 10px 10px 0;
    margin: 24px 0;
    color: var(--text-secondary);
    font-size: 15px;
  }
  .article-content blockquote p { margin-bottom: 0; }
  .article-content img {
    border-radius: 12px;
    max-width: 100%;
    height: auto;
    margin: 24px 0;
  }
  .article-content figure {
    margin: 24px 0;
    text-align: center;
  }
  .article-content figcaption {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 8px;
  }
  .article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
  }
  .article-content a:hover { color: var(--primary-dark); }
  .article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
  }
  .article-content th,
  .article-content td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    text-align: left;
  }
  .article-content th {
    background: var(--bg);
    font-weight: 600;
    color: var(--text);
  }
  .article-content code {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 2px 6px;
    font-size: 14px;
  }
  .article-footer {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
  }
  .article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  .tag {
    background: var(--bg);
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    cursor: default;
  }
  .tag:hover {
    background: var(--primary-light);
    color: var(--primary);
  }

  /* ========== Related ========== */
  .related-section {
    max-width: 780px;
    margin: 56px auto 0;
  }
  .related-section h2 {
    font-size: 22px;
    font-weight: 700;
    margin: 0 0 20px;
    color: var(--text);
  }
  .related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .related-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
  }
  .related-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
  }
  .related-img {
    height: 130px;
    overflow: hidden;
    position: relative;
    background: var(--primary-light);
  }
  .related-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
  }
  .related-card:hover .related-img img { transform: scale(1.05); }
  .related-card h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    padding: 14px 18px 0;
    margin: 0;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .related-card .date {
    font-size: 12px;
    color: var(--text-muted);
    padding: 8px 18px 16px;
    display: block;
    margin-top: auto;
  }

  /* ========== Back Link ========== */
  .back-link {
    max-width: 780px;
    margin: 28px auto 0;
  }
  .back-link a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
  }
  .back-link a:hover {
    color: var(--primary);
  }
  .back-link a svg { transition: transform 0.2s ease; }
  .back-link a:hover svg { transform: translateX(-3px); }

  /* ========== Not Found ========== */
  .not-found-box {
    max-width: 620px;
    margin: 40px auto;
    background: #fff;
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 64px 48px;
    text-align: center;
  }
  .not-found-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    margin: 0 auto 20px;
  }
  .not-found-box h2 {
    font-size: 24px;
    margin: 0 0 12px;
    color: var(--text);
  }
  .not-found-box p {
    color: var(--text-secondary);
    font-size: 15px;
    margin: 0 0 28px;
    line-height: 1.7;
  }

  /* ========== Footer ========== */
  .site-footer {
    background: #fff;
    border-top: 2px solid var(--primary);
    padding: 56px 0 24px;
    margin-top: 40px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.4fr;
    gap: 40px;
    margin-bottom: 40px;
  }
  .footer-brand .footer-logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .footer-brand .footer-logo svg { color: var(--primary); }
  .footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
  }
  .footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 16px;
  }
  .footer-col a {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 5px 0;
    transition: color 0.2s ease;
  }
  .footer-col a:hover {
    color: var(--primary);
  }
  .footer-col p {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 6px 0;
    line-height: 1.6;
  }
  .footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--text-muted);
  }

  /* ========== Responsive ========== */
  @media (max-width: 1280px) {
    .container { max-width: 100%; }
    .search-box { width: 180px; }
  }
  @media (max-width: 1024px) {
    .main-nav { display: none; }
    .header-actions .search-box,
    .header-actions .icon-btn,
    .header-actions .btn-sm { display: none; }
    .mobile-toggle { display: flex; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  }
  @media (max-width: 768px) {
    .article-card { padding: 32px 24px; border-radius: 14px; }
    .article-header h1 { font-size: 26px; }
    .article-content { font-size: 15px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .site-footer { padding-top: 40px; }
    .article-wrap { padding: 32px 0 56px; }
  }
  @media (max-width: 520px) {
    .container { padding: 0 16px; }
    .related-grid { grid-template-columns: 1fr; }
    .article-card { padding: 24px 18px; }
    .article-header h1 { font-size: 22px; }
    .article-meta { gap: 12px; }
    .breadcrumb-inner .current { max-width: 180px; }
    .not-found-box { padding: 40px 24px; }
    .not-found-box h2 { font-size: 20px; }
    .btn-primary { padding: 10px 20px; font-size: 14px; }
  }

/* roulang page: category2 */
:root {
            --primary: #3B82F6;
            --primary-hover: #2563EB;
            --primary-deep: #1D4ED8;
            --teal: #14B8A6;
            --orange: #F59E0B;
            --red: #EF4444;
            --green: #10B981;
            --bg: #F8FAFC;
            --bg-light: #FFFFFF;
            --ink: #1E293B;
            --ink-secondary: #64748B;
            --ink-muted: #94A3B8;
            --border: #E2E8F0;
            --radius-card: 14px;
            --radius-btn: 10px;
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
            --font-stack: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Segoe UI', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
        }

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

        .page-main {
            min-height: 80vh;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            height: 68px;
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: linear-gradient(135deg, #2563EB, #3B82F6);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
        }

        .brand-logo .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: -0.01em;
        }

        .brand-logo .logo-sub {
            font-size: 11px;
            color: var(--ink-muted);
            font-weight: 400;
            background: #F1F5F9;
            padding: 2px 8px;
            border-radius: 999px;
            margin-left: 2px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav .nav-link {
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-secondary);
            border-radius: 8px;
            transition: all 0.25s ease;
            position: relative;
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-50);
        }

        .main-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .main-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 999px;
            background: var(--primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: #F1F5F9;
            border-radius: 999px;
            padding: 7px 14px;
            gap: 8px;
            border: 1px solid transparent;
            transition: all 0.3s ease;
            min-width: 180px;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
            background: #fff;
        }

        .search-box i {
            font-size: 13px;
            color: var(--ink-muted);
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 13px;
            color: var(--ink);
            width: 100%;
        }

        .search-box .kbd-hint {
            font-size: 11px;
            color: var(--ink-muted);
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 4px;
            padding: 1px 6px;
            font-weight: 500;
            white-space: nowrap;
        }

        .icon-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ink-secondary);
            font-size: 15px;
            background: transparent;
            transition: all 0.25s ease;
            position: relative;
        }

        .icon-btn:hover {
            background: #F1F5F9;
            color: var(--primary);
        }

        .icon-btn .badge-dot {
            position: absolute;
            top: 6px;
            right: 7px;
            width: 7px;
            height: 7px;
            background: var(--red);
            border-radius: 50%;
            border: 2px solid #fff;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            line-height: 1.4;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0px);
            box-shadow: 0 2px 6px rgba(37, 99, 235, 0.2);
        }

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

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--ink);
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 500;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
            cursor: pointer;
            line-height: 1.4;
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-50);
        }

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

        .btn-mobile-menu {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--ink);
            border: 1px solid var(--border);
            background: #fff;
            cursor: pointer;
        }

        /* Mobile drawer */
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 300px;
            height: 100vh;
            background: #fff;
            z-index: 1100;
            box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
            transition: right 0.3s ease;
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .mobile-drawer .drawer-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
        }

        .mobile-drawer .drawer-close {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #F1F5F9;
            color: var(--ink);
            font-size: 16px;
            cursor: pointer;
        }

        .mobile-drawer .nav-link {
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-secondary);
        }

        .mobile-drawer .nav-link:hover {
            background: var(--primary-50);
            color: var(--primary);
        }

        .mobile-drawer .nav-link.active {
            background: var(--primary-50);
            color: var(--primary);
            font-weight: 600;
        }

        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            z-index: 1050;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .drawer-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* ===== Hero category ===== */
        .category-hero {
            padding: 140px 0 72px;
            background: linear-gradient(180deg, #EFF6FF 0%, #F8FAFC 100%);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -220px;
            right: -180px;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--border);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            box-shadow: var(--shadow-card);
            margin-bottom: 20px;
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--teal);
            display: inline-block;
        }

        .category-hero h1 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--ink);
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .category-hero .hero-sub {
            font-size: 17px;
            color: var(--ink-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 520px;
        }

        .category-hero .hero-lead {
            font-size: 15px;
            color: var(--ink-muted);
            margin-bottom: 28px;
        }

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

        .hero-visual {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
            aspect-ratio: 4/3;
        }

        .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hero-visual .overlay-card {
            position: absolute;
            bottom: 16px;
            left: 16px;
            right: 16px;
            background: rgba(255, 255, 255, 0.94);
            border-radius: 12px;
            padding: 14px 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
        }

        .hero-visual .overlay-card .label {
            font-size: 13px;
            color: var(--ink-secondary);
            font-weight: 400;
        }

        .hero-visual .overlay-card .value {
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            padding: 20px 0 0;
            background: transparent;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--ink-muted);
        }

        .breadcrumb-list a {
            color: var(--ink-secondary);
        }

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

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

        .breadcrumb-list .current {
            color: var(--ink);
            font-weight: 500;
        }

        /* ===== Section base ===== */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: var(--bg-light);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
        }

        .section-head .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-50);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--ink);
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--ink-secondary);
            line-height: 1.7;
        }

        /* ===== Feature cards (2+1 layout) ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

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

        .feature-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-50);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--ink);
        }

        .feature-card p {
            font-size: 14px;
            color: var(--ink-secondary);
            line-height: 1.7;
        }

        .feature-card .arrow-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            margin-top: 14px;
            transition: all 0.3s ease;
        }

        .feature-card .arrow-link:hover {
            gap: 8px;
        }

        .feature-card.wide {
            grid-row: span 1;
        }

        /* ===== Info / image mixed ===== */
        .info-section {
            padding: 80px 0;
        }

        .info-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .info-media {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .info-media img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }

        .info-media .media-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
        }

        .info-content {
            padding: 0;
        }

        .info-content .info-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--teal);
            background: rgba(20, 184, 166, 0.08);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .info-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.4;
            margin-bottom: 16px;
        }

        .info-content p {
            font-size: 15px;
            color: var(--ink-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .check-list {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--ink);
        }

        .check-list li i {
            color: var(--teal);
            font-size: 14px;
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ===== Entry cards ===== */
        .entry-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .entry-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }

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

        .entry-card .entry-thumb {
            height: 160px;
            overflow: hidden;
            position: relative;
        }

        .entry-card .entry-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .entry-card:hover .entry-thumb img {
            transform: scale(1.05);
        }

        .entry-card .entry-body {
            padding: 20px;
        }

        .entry-card .entry-badge {
            display: inline-block;
            font-size: 11px;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-50);
            padding: 2px 10px;
            border-radius: 999px;
            margin-bottom: 10px;
        }

        .entry-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .entry-card p {
            font-size: 13px;
            color: var(--ink-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
        }

        .entry-card .entry-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            transition: all 0.3s ease;
        }

        .entry-card .entry-link:hover {
            gap: 10px;
        }

        /* ===== Steps / flow ===== */
        .steps-section {
            background: var(--bg-light);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
        }

        .steps-grid::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 15%;
            right: 15%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-200), var(--primary), var(--primary-200));
            border-radius: 2px;
        }

        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .step-number {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            margin: 0 auto 20px;
            box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
            border: 4px solid #fff;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--ink-secondary);
            line-height: 1.7;
        }

        /* ===== Stats block ===== */
        .stats-section {
            background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
            padding: 60px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

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

        .stat-item {
            text-align: center;
            padding: 24px 16px;
            background: rgba(255, 255, 255, 0.8);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.9);
            box-shadow: var(--shadow-card);
        }

        .stat-item .stat-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
            font-variant-numeric: tabular-nums;
        }

        .stat-item .stat-label {
            font-size: 14px;
            color: var(--ink-secondary);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 2px 12px rgba(59, 130, 246, 0.08);
        }

        .faq-item .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
        }

        .faq-item .faq-question .q-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-50);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .faq-item .faq-question .q-text {
            flex: 1;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink);
        }

        .faq-item .faq-question .q-arrow {
            font-size: 14px;
            color: var(--ink-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.active .faq-question .q-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-item .faq-answer .answer-inner {
            padding: 0 24px 20px 62px;
            font-size: 14px;
            color: var(--ink-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(180deg, #EFF6FF 0%, #F8FAFC 100%);
            border-top: 1px solid var(--border);
        }

        .cta-box {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 48px 40px;
            box-shadow: var(--shadow-card);
        }

        .cta-box h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-box p {
            font-size: 15px;
            color: var(--ink-secondary);
            margin-bottom: 28px;
        }

        .cta-box .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .cta-note {
            margin-top: 16px;
            font-size: 13px;
            color: var(--ink-muted);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1E293B;
            color: #CBD5E1;
            padding: 64px 0 24px;
            margin-top: 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .site-footer .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .site-footer .footer-logo i {
            color: var(--primary);
            font-size: 20px;
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            opacity: 0.8;
        }

        .site-footer .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: #94A3B8;
            padding-bottom: 10px;
            transition: color 0.2s;
        }

        .site-footer .footer-col a:hover {
            color: var(--primary);
        }

        .site-footer .footer-col p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.8;
        }

        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            padding-top: 24px;
            font-size: 13px;
            color: #64748B;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }

            .btn-mobile-menu {
                display: flex;
            }

            .search-box {
                min-width: 140px;
            }

            .header-actions .icon-btn:nth-child(-n+2) {
                display: none;
            }

            .category-hero {
                padding: 110px 0 56px;
            }

            .category-hero .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

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

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

            .steps-grid {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 20px;
            }

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

            .info-media img {
                height: 260px;
            }

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

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .header-actions .search-box {
                display: none;
            }

            .header-actions .icon-btn {
                display: none;
            }

            .header-actions .btn-primary {
                padding: 8px 14px;
                font-size: 13px;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .category-hero .hero-sub {
                font-size: 15px;
            }

            .section {
                padding: 56px 0;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .section-head h2 {
                font-size: 24px;
            }

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

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

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .steps-grid::before {
                display: none;
            }

            .step-number {
                width: 56px;
                height: 56px;
                font-size: 20px;
            }

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

            .stat-item .stat-num {
                font-size: 24px;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .hero-ctas,
            .cta-box .btn-group {
                flex-direction: column;
                gap: 12px;
            }

            .cta-box {
                padding: 32px 20px;
            }

            .cta-box h2 {
                font-size: 22px;
            }

            .site-footer {
                padding-top: 40px;
            }

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

            .site-footer .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }

            .faq-item .faq-question {
                padding: 16px 18px;
            }

            .faq-item .faq-answer .answer-inner {
                padding: 0 18px 18px 50px;
            }

            .breadcrumb-list {
                font-size: 13px;
                overflow-x: auto;
                white-space: nowrap;
                padding-bottom: 4px;
            }
        }

        @media (max-width: 520px) {
            .brand-logo .logo-sub {
                display: none;
            }

            .brand-logo .logo-text {
                font-size: 18px;
            }

            .category-hero {
                padding: 96px 0 40px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .category-hero .hero-lead {
                font-size: 14px;
            }

            .hero-visual .overlay-card {
                padding: 12px 14px;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }

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

            .stat-item {
                padding: 16px;
            }
        }

/* roulang page: category3 */
:root {
      --brand: #3B82F6;
      --brand-dark: #2563EB;
      --brand-darker: #1D4ED8;
      --accent: #14B8A6;
      --surface: #F8FAFC;
      --card: #FFFFFF;
      --ink: #1E293B;
      --ink-secondary: #64748B;
      --ink-faint: #94A3B8;
      --line: #E2E8F0;
      --radius-card: 14px;
      --radius-btn: 10px;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--surface);
      color: var(--ink);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button,
    input,
    select {
      font-family: inherit;
    }

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

    /* ---------- Header / Navigation ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(6px);
      border-bottom: 1px solid var(--line);
      transition: box-shadow 0.3s ease;
    }

    .site-header.scrolled {
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    }

    .header-inner {
      display: flex;
      align-items: center;
      height: 68px;
      gap: 24px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .brand-mark {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 800;
      font-size: 18px;
      letter-spacing: -0.5px;
      box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
    }

    .brand-text {
      font-size: 19px;
      font-weight: 700;
      color: var(--ink);
      line-height: 1.2;
    }

    .brand-text span {
      color: var(--brand-dark);
    }

    .brand-sub {
      font-size: 11px;
      color: var(--ink-faint);
      font-weight: 400;
      letter-spacing: 1px;
      line-height: 1;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      flex: 1;
      margin-left: 20px;
    }

    .nav-link {
      padding: 8px 16px;
      font-size: 15px;
      font-weight: 500;
      color: var(--ink-secondary);
      border-radius: 8px;
      transition: all 0.2s ease;
      position: relative;
    }

    .nav-link:hover {
      color: var(--brand-dark);
      background: #EFF6FF;
    }

    .nav-link.active {
      color: var(--brand-dark);
      background: #EFF6FF;
      font-weight: 600;
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 3px;
      border-radius: 3px;
      background: var(--brand);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
      margin-left: auto;
    }

    .cmd-search {
      display: flex;
      align-items: center;
      gap: 8px;
      background: #F1F5F9;
      border: 1px solid transparent;
      border-radius: 999px;
      padding: 8px 16px;
      height: 38px;
      width: 200px;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .cmd-search:hover {
      border-color: #BFDBFE;
      background: #FFFFFF;
      box-shadow: 0 2px 8px rgba(59, 130, 246, 0.06);
    }

    .cmd-search svg {
      width: 16px;
      height: 16px;
      color: var(--ink-faint);
      flex-shrink: 0;
    }

    .cmd-search span {
      font-size: 13px;
      color: var(--ink-faint);
      flex: 1;
    }

    .cmd-search .kbd {
      font-size: 11px;
      color: var(--ink-faint);
      background: #fff;
      border: 1px solid #E2E8F0;
      border-radius: 4px;
      padding: 1px 5px;
      font-family: inherit;
    }

    .icon-btn {
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 999px;
      color: var(--ink-secondary);
      background: transparent;
      border: none;
      cursor: pointer;
      transition: all 0.2s ease;
      position: relative;
    }

    .icon-btn:hover {
      background: #F1F5F9;
      color: var(--brand-dark);
    }

    .icon-btn svg {
      width: 18px;
      height: 18px;
    }

    .badge-dot {
      position: absolute;
      width: 8px;
      height: 8px;
      background: #EF4444;
      border-radius: 50%;
      top: 7px;
      right: 8px;
      border: 2px solid #fff;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      background: var(--brand-dark);
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .btn-primary:hover {
      background: var(--brand-darker);
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
    }

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

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      background: #fff;
      color: var(--ink);
      font-size: 14px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      border: 1px solid var(--line);
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .btn-secondary:hover {
      border-color: var(--brand);
      color: var(--brand-dark);
      background: #F8FAFF;
    }

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

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

    .btn-lg {
      padding: 14px 34px;
      font-size: 15px;
    }

    .btn-block-mobile {
      width: auto;
    }

    /* Mobile Menu */
    .mobile-menu-btn {
      display: none;
      width: 36px;
      height: 36px;
      border: none;
      background: transparent;
      border-radius: 8px;
      cursor: pointer;
      color: var(--ink);
      align-items: center;
      justify-content: center;
    }

    .mobile-menu-btn:hover {
      background: #F1F5F9;
    }

    .mobile-menu-btn svg {
      width: 20px;
      height: 20px;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: #fff;
      z-index: 200;
      padding: 20px 24px;
      flex-direction: column;
      overflow-y: auto;
    }

    .mobile-menu.open {
      display: flex;
    }

    .mobile-menu-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
    }

    .mobile-menu-close {
      width: 36px;
      height: 36px;
      border: none;
      background: #F1F5F9;
      border-radius: 8px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .mobile-menu-nav {
      display: flex;
      flex-direction: column;
      gap: 4px;
      margin-bottom: 24px;
    }

    .mobile-menu-nav a {
      padding: 12px 16px;
      font-size: 16px;
      font-weight: 500;
      color: var(--ink);
      border-radius: 10px;
      transition: all 0.2s;
    }

    .mobile-menu-nav a:hover {
      background: #F1F5F9;
    }

    .mobile-menu-nav a.active {
      background: #EFF6FF;
      color: var(--brand-dark);
      font-weight: 600;
    }

    /* ---------- Hero ---------- */
    .page-hero {
      background: linear-gradient(180deg, #EFF6FF 0%, #F8FAFC 100%);
      padding: 72px 0 80px;
      position: relative;
      overflow: hidden;
    }

    .page-hero::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -80px;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
      pointer-events: none;
    }

    .page-hero::after {
      content: '';
      position: absolute;
      bottom: -60px;
      left: -60px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(20, 184, 166, 0.06) 0%, transparent 70%);
      pointer-events: none;
    }

    .page-hero .container {
      position: relative;
      z-index: 1;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--ink-faint);
      margin-bottom: 24px;
    }

    .breadcrumb a {
      color: var(--ink-faint);
      transition: color 0.2s;
    }

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

    .breadcrumb-sep {
      color: #CBD5E1;
    }

    .breadcrumb-current {
      color: var(--ink-secondary);
      font-weight: 500;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 60px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 999px;
      padding: 6px 16px;
      font-size: 13px;
      color: var(--ink-secondary);
      font-weight: 500;
      margin-bottom: 20px;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
    }

    .hero-badge .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.2);
    }

    .page-hero h1 {
      font-size: 38px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--ink);
      margin-bottom: 18px;
      letter-spacing: 0;
    }

    .page-hero h1 .highlight {
      color: var(--brand-dark);
      position: relative;
    }

    .hero-desc {
      font-size: 16px;
      color: var(--ink-secondary);
      line-height: 1.8;
      max-width: 480px;
      margin-bottom: 32px;
    }

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

    .hero-stats {
      display: flex;
      gap: 40px;
      margin-top: 40px;
      padding-top: 28px;
      border-top: 1px solid var(--line);
    }

    .hero-stat {
      text-align: left;
    }

    .hero-stat-value {
      font-size: 26px;
      font-weight: 700;
      color: var(--ink);
      font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
      font-variant-numeric: tabular-nums;
    }

    .hero-stat-value em {
      font-style: normal;
      color: var(--brand);
      font-size: 18px;
      margin-left: 2px;
    }

    .hero-stat-label {
      font-size: 13px;
      color: var(--ink-faint);
      margin-top: 2px;
    }
    
    .hero-image-wrap {
      position: relative;
    }

    .hero-image {
      border-radius: 16px;
      box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
      overflow: hidden;
      aspect-ratio: 4/3;
    }

    .hero-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .hero-float-card {
      position: absolute;
      bottom: -20px;
      left: -20px;
      background: #fff;
      border-radius: 14px;
      padding: 14px 18px;
      box-shadow: var(--shadow-hover);
      display: flex;
      align-items: center;
      gap: 10px;
      border: 1px solid var(--line);
    }

    .hero-float-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: #EFF6FF;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand);
    }

    .hero-float-text {
      font-size: 13px;
      color: var(--ink-secondary);
      line-height: 1.4;
    }

    .hero-float-text strong {
      color: var(--ink);
      font-size: 14px;
      display: block;
    }

    /* ---------- Section spacing ---------- */
    .section {
      padding: 96px 0;
    }

    .section-alt {
      background: #fff;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .section-head {
      max-width: 640px;
      margin-bottom: 52px;
    }

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-head h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--ink);
      line-height: 1.4;
      margin-bottom: 14px;
      letter-spacing: 0;
    }

    .section-head p {
      font-size: 15px;
      color: var(--ink-secondary);
      line-height: 1.7;
    }

    .section-tag {
      display: inline-block;
      background: #EFF6FF;
      color: var(--brand-dark);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }

    /* ---------- Feature cards ---------- */
    .feature-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 24px;
    }

    .feature-card {
      background: var(--card);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--line);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .feature-card:first-child {
      grid-column: span 2;
      background: linear-gradient(135deg, #fff 0%, #F8FAFC 100%);
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: transparent;
      transition: background 0.3s ease;
    }

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

    .feature-card:hover::before {
      background: var(--brand);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: #EFF6FF;
      color: var(--brand-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }

    .feature-icon svg {
      width: 22px;
      height: 22px;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--ink-secondary);
      line-height: 1.75;
      max-width: 420px;
    }

    .feature-link {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: var(--brand);
      font-size: 14px;
      font-weight: 500;
      margin-top: 18px;
      transition: all 0.2s ease;
    }

    .feature-link:hover {
      color: var(--brand-darker);
      gap: 8px;
    }

    .feature-link svg {
      width: 14px;
      height: 14px;
      transition: transform 0.2s;
    }

    /* ---------- Content grid with images ---------- */
    .content-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .content-grid.reverse .content-text {
      order: 2;
    }

    .content-grid.reverse .content-image {
      order: 1;
    }

    .content-image {
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    .content-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      aspect-ratio: 3/2;
      transition: transform 0.4s ease;
    }

    .content-image:hover img {
      transform: scale(1.03);
    }

    .content-text h3 {
      font-size: 24px;
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 16px;
      line-height: 1.4;
    }

    .content-text p {
      font-size: 15px;
      color: var(--ink-secondary);
      line-height: 1.8;
      margin-bottom: 18px;
    }

    .check-list {
      margin-bottom: 24px;
    }

    .check-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: var(--ink);
      padding: 8px 0;
      border-bottom: 1px dashed var(--line);
      list-style: none;
    }

    .check-list li:last-child {
      border-bottom: none;
    }

    .check-list svg {
      width: 18px;
      height: 18px;
      color: var(--accent);
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* ---------- Steps / Process ---------- */
    .steps-section {
      background: var(--ink);
      color: #fff;
      padding: 96px 0;
    }

    .steps-section .section-head h2 {
      color: #fff;
    }

    .steps-section .section-head p {
      color: #94A3B8;
    }

    .steps-section .section-tag {
      background: rgba(59, 130, 246, 0.2);
      color: #93C5FD;
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 48px;
    }

    .step-card {
      border-radius: var(--radius-card);
      padding: 28px 24px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.08);
      position: relative;
      transition: all 0.3s ease;
    }

    .step-card:hover {
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-4px);
    }

    .step-number {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--brand);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 20px;
      box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 600;
      margin-bottom: 8px;
      color: #fff;
    }

    .step-card p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* ---------- Version cards ---------- */
    .version-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .version-card {
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      position: relative;
    }

    .version-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #BFDBFE;
    }

    .version-icon {
      width: 64px;
      height: 64px;
      border-radius: 16px;
      background: #EFF6FF;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      color: var(--brand);
    }

    .version-icon svg {
      width: 28px;
      height: 28px;
    }

    .version-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 8px;
    }

    .version-card .version-badge {
      display: inline-block;
      background: #F0FDF4;
      color: #16A34A;
      font-size: 12px;
      font-weight: 600;
      padding: 2px 10px;
      border-radius: 999px;
      margin-bottom: 14px;
    }

    .version-card p {
      font-size: 14px;
      color: var(--ink-secondary);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .version-meta {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      font-size: 13px;
      color: var(--ink-faint);
    }


    /* ---------- FAQ ---------- */
    .faq-grid {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .faq-item:hover {
      border-color: #BFDBFE;
      box-shadow: var(--shadow-card);
    }

    .faq-item.open {
      border-color: var(--brand);
      box-shadow: 0 4px 16px rgba(59, 130, 246, 0.08);
    }

    .faq-question {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 20px 24px;
      cursor: pointer;
      user-select: none;
    }

    .faq-q-icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: #EFF6FF;
      color: var(--brand-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 700;
      flex-shrink: 0;
      transition: all 0.3s ease;
    }

    .faq-item.open .faq-q-icon {
      background: var(--brand);
      color: #fff;
    }

    .faq-question h3 {
      font-size: 15px;
      font-weight: 500;
      color: var(--ink);
      flex: 1;
      line-height: 1.5;
      margin: 0;
    }

    .faq-arrow {
      color: var(--ink-faint);
      transition: transform 0.3s ease;
      flex-shrink: 0;
    }

    .faq-item.open .faq-arrow {
      transform: rotate(180deg);
      color: var(--brand);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }

    .faq-item.open .faq-answer {
      max-height: 300px;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--ink-secondary);
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
      margin-left: 38px;
    }

    /* ---------- CTA ---------- */
    .cta-section {
      background: linear-gradient(135deg, #EFF6FF 0%, #F0FDFA 100%);
      padding: 80px 0;
      border-top: 1px solid var(--line);
    }

    .cta-card {
      background: #fff;
      border-radius: 20px;
      padding: 48px;
      text-align: center;
      max-width: 840px;
      margin: 0 auto;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--line);
      position: relative;
      overflow: hidden;
    }

    .cta-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--brand), var(--accent));
    }

    .cta-card h2 {
      font-size: 26px;
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 14px;
    }

    .cta-card p {
      font-size: 15px;
      color: var(--ink-secondary);
      margin-bottom: 30px;
      line-height: 1.7;
      max-width: 520px;
      margin-left: auto;
      margin-right: auto;
    }

    .cta-actions {
      display: flex;
      gap: 14px;
      justify-content: center;
      flex-wrap: wrap;
      align-items: center;
    }

    .cta-note {
      font-size: 13px;
      color: var(--ink-faint);
      margin-top: 16px;
    }

    /* ---------- Download stats ---------- */
    .stats-band {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 40px 36px;
      box-shadow: var(--shadow-card);
    }

    .stat-item {
      text-align: center;
      position: relative;
    }

    .stat-item:not(:last-child)::after {
      content: '';
      position: absolute;
      right: -12px;
      top: 50%;
      transform: translateY(-50%);
      width: 1px;
      height: 40px;
      background: var(--line);
    }

    .stat-num {
      font-size: 32px;
      font-weight: 700;
      color: var(--ink);
      font-variant-numeric: tabular-nums;
      line-height: 1.3;
    }

    .stat-num em {
      font-style: normal;
      color: var(--brand);
      font-size: 22px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--ink-secondary);
      margin-top: 6px;
    }

    /* ---------- Footer ---------- */
    .site-footer {
      background: #fff;
      border-top: 2px solid var(--brand);
      padding: 60px 0 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 12px;
    }

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

    .footer-brand p {
      font-size: 14px;
      color: var(--ink-secondary);
      line-height: 1.7;
      max-width: 280px;
      margin-top: 8px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 16px;
    }

    .footer-col a {
      display: block;
      font-size: 14px;
      color: var(--ink-secondary);
      padding: 6px 0;
      transition: all 0.2s ease;
    }

    .footer-col a:hover {
      color: var(--brand-dark);
      transform: translateX(4px);
    }

    .footer-col p {
      font-size: 14px;
      color: var(--ink-secondary);
      padding: 6px 0;
      line-height: 1.6;
    }

    .footer-bottom {
      border-top: 1px solid var(--line);
      padding: 20px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--ink-faint);
      gap: 16px;
      flex-wrap: wrap;
    }

    /* ---------- Responsive ---------- */
    @media (max-width: 1024px) {
      .main-nav {
        display: none;
      }
      .mobile-menu-btn {
        display: flex;
      }
      .header-actions .cmd-search {
        width: 160px;
      }
      .feature-grid {
        grid-template-columns: 1fr 1fr;
      }
      .feature-card:first-child {
        grid-column: span 2;
      }
      .steps-grid {
        grid-template-columns: 1fr 1fr;
      }
      .version-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero-image-wrap {
        max-width: 560px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .stats-band {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px 20px;
      }
      .stat-item:nth-child(2)::after {
        display: none;
      }
    }

    @media (max-width: 768px) {
      .page-hero {
        padding: 48px 0 60px;
      }
      .page-hero h1 {
        font-size: 30px;
      }
      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }
      .hero-actions .btn-primary,
      .hero-actions .btn-secondary {
        width: 100%;
      }
      .section {
        padding: 64px 0;
      }
      .content-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .content-grid.reverse .content-text {
        order: 1;
      }
      .content-grid.reverse .content-image {
        order: 2;
      }
      .feature-grid {
        grid-template-columns: 1fr;
      }
      .feature-card:first-child {
        grid-column: span 1;
      }
      .steps-section {
        padding: 64px 0;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .version-grid {
        grid-template-columns: 1fr;
      }
      .version-card {
        max-width: 400px;
        margin: 0 auto;
        width: 100%;
      }
      .cta-card {
        padding: 32px 24px;
      }
      .cta-actions {
        flex-direction: column;
        align-items: stretch;
      }
      .cta-actions .btn-primary,
      .cta-actions .btn-secondary {
        width: 100%;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
      .stats-band {
        grid-template-columns: 1fr 1fr;
        padding: 28px 20px;
      }
      .stat-num {
        font-size: 26px;
      }
      .btn-block-mobile {
        width: 100%;
      }
      .section-head h2 {
        font-size: 24px;
      }
      .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
      }
      .cmd-search {
        display: none;
      }
      .header-inner {
        gap: 12px;
      }
    }

    @media (max-width: 480px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
      .page-hero h1 {
        font-size: 26px;
      }
      .hero-stat-value {
        font-size: 20px;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .version-grid {
        grid-template-columns: 1fr;
      }
      .stats-band {
        grid-template-columns: 1fr;
      }
      .stat-item:not(:last-child)::after {
        display: none;
      }
      .stat-item {
        text-align: left;
        display: flex;
        align-items: baseline;
        justify-content: space-between;
        padding: 8px 0;
        border-bottom: 1px solid var(--line);
      }
      .stat-item:last-child {
        border-bottom: none;
      }
      .stat-num {
        font-size: 24px;
      }
      .stat-label {
        margin-top: 0;
      }
      .header-actions .icon-btn:last-of-type {
        display: none;
      }
    }