/* roulang page: index */
:root {
  --bg-0: #0A0E14;
  --bg-1: #0F151C;
  --bg-2: #141B24;
  --bg-3: #1A2330;
  --border-0: #1C2630;
  --border-1: #2C3A4A;
  --text-0: #EDF1F6;
  --text-1: #A6AFBB;
  --text-2: #66727F;
  --primary: #1FD286;
  --primary-deep: #00B56F;
  --primary-glow: rgba(31, 210, 134, 0.35);
  --secondary: #E0B87B;
  --danger: #F4676B;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-0);
  color: var(--text-0);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

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

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

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

.section {
  padding: 100px 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--primary);
  text-transform: uppercase;
}

.section-label::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.section-title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: var(--text-0);
  margin-top: 12px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-1);
  line-height: 1.8;
  max-width: 640px;
  margin-top: 14px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  padding: 12px 28px;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  min-height: 44px;
  line-height: 1.2;
}

.btn-primary {
  background: var(--primary);
  color: #08120C;
  box-shadow: 0 4px 14px rgba(31, 210, 134, 0.25);
}

.btn-primary:hover {
  background: #37e095;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(31, 210, 134, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
  background: var(--primary-deep);
  box-shadow: 0 2px 8px rgba(31, 210, 134, 0.2);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-0);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(31, 210, 134, 0.06);
}

.btn-secondary:active {
  background: rgba(31, 210, 134, 0.12);
  transform: scale(0.98);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  min-height: 38px;
}

.btn-block {
  width: 100%;
}

/* ===== 标签 / 徽章 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.tag-primary {
  background: rgba(31, 210, 134, 0.12);
  color: var(--primary);
}

.tag-gold {
  background: rgba(224, 184, 123, 0.14);
  color: var(--secondary);
}

.tag-muted {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-1);
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-0);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(10, 14, 20, 0.96);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

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

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

.brand-icon {
  width: 36px;
  height: 36px;
  color: var(--primary);
}

.brand-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-0);
  letter-spacing: -0.3px;
  white-space: nowrap;
}

.brand-text .brand-sub {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  margin-left: 4px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-1);
  padding: 8px 2px;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-0);
}

.nav-link.active {
  color: var(--text-0);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
  box-shadow: 0 8px 20px -6px var(--primary-glow);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 6px;
  align-items: center;
  justify-content: center;
  color: var(--text-0);
  border: 1px solid var(--border-0);
  background: rgba(255, 255, 255, 0.03);
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  background-image: linear-gradient(to right, rgba(10, 14, 20, 0.92) 0%, rgba(10, 14, 20, 0.72) 55%, rgba(10, 14, 20, 0.45) 100%),
    url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, rgba(31, 210, 134, 0.2), transparent 70%);
  pointer-events: none;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--primary);
  background: rgba(31, 210, 134, 0.1);
  border: 1px solid rgba(31, 210, 134, 0.25);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
  animation: fadeUp 0.7s ease 0.1s both;
}

.hero h1 {
  font-size: 64px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -1px;
  color: var(--text-0);
  max-width: 840px;
  animation: fadeUp 0.7s ease 0.1s both;
}

.hero h1 .highlight {
  color: var(--primary);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-1);
  line-height: 1.8;
  max-width: 640px;
  margin-top: 24px;
  animation: fadeUp 0.7s ease 0.25s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 40px;
  flex-wrap: wrap;
  animation: fadeUp 0.7s ease 0.35s both;
}

.hero-metrics {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  animation: fadeUp 0.7s ease 0.45s both;
}

.hero-metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-metric .value {
  font-family: "DIN Alternate", "Barlow Condensed", tabular-nums;
  font-size: 30px;
  font-weight: 700;
  color: var(--text-0);
  line-height: 1.1;
}

.hero-metric .label {
  font-size: 13px;
  color: var(--text-2);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 指标看板 ===== */
.stats-section {
  background: var(--bg-1);
  border-top: 1px solid var(--border-0);
  border-bottom: 1px solid var(--border-0);
  padding: 80px 0;
}

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

.stat-item {
  padding: 24px 0;
  border-top: 1px solid var(--border-0);
}

.stat-item .stat-label {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 12px;
}

.stat-item .stat-value {
  font-family: "DIN Alternate", "Barlow Condensed", tabular-nums;
  font-size: 64px;
  font-weight: 800;
  color: var(--text-0);
  line-height: 1;
  letter-spacing: -1px;
  font-variant-numeric: tabular-nums;
}

.stat-item .stat-value .unit {
  font-size: 20px;
  color: var(--text-2);
  font-weight: 600;
  margin-left: 4px;
}

.stat-item .stat-bar {
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  margin-top: 16px;
  transition: width 0.8s ease;
}

.stat-item .stat-bar.gold {
  background: var(--secondary);
}

/* ===== 服务矩阵 ===== */
.services-section {
  background: var(--bg-0);
  padding: 100px 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 48px;
  gap: 24px;
  flex-wrap: wrap;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.2s ease;
}

.text-link:hover {
  gap: 10px;
  color: #37e095;
}

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

.service-card {
  background: var(--bg-2);
  border: 1px solid var(--border-0);
  border-radius: 10px;
  padding: 32px 28px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.service-card:hover {
  background: var(--bg-3);
  border-color: var(--border-1);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card .card-icon {
  width: 44px;
  height: 44px;
  color: var(--primary);
  margin-bottom: 20px;
  transition: transform 0.25s ease;
}

.service-card:hover .card-icon {
  transform: translateX(4px);
}

.service-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-0);
  line-height: 1.3;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.7;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.service-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-top: 16px;
  transition: gap 0.2s ease;
}

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

.service-card.featured {
  border-color: rgba(224, 184, 123, 0.4);
  background: linear-gradient(145deg, rgba(224, 184, 123, 0.08) 0%, var(--bg-2) 60%);
}

.service-card.featured::before {
  background: var(--secondary);
}

.service-card.featured .card-icon {
  color: var(--secondary);
}

.service-card.featured h3 {
  color: var(--text-0);
}

.service-card.featured .card-link {
  color: var(--secondary);
}

.service-card.featured:hover {
  border-color: var(--primary);
}

/* ===== 资讯动态 ===== */
.news-section {
  background: var(--bg-1);
  border-top: 1px solid var(--border-0);
  border-bottom: 1px solid var(--border-0);
  padding: 100px 0;
}

.news-layout {
  display: grid;
  grid-template-columns: 6fr 4fr;
  gap: 32px;
  margin-top: 48px;
}

.news-feature-card {
  background: var(--bg-2);
  border: 1px solid var(--border-0);
  border-radius: 10px;
  overflow: hidden;
  display: block;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.news-feature-card:hover {
  border-color: var(--border-1);
  transform: translateY(-4px);
}

.news-feature-media {
  aspect-ratio: 16/9;
  overflow: hidden;
}

.news-feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.news-feature-card:hover .news-feature-media img {
  transform: scale(1.03);
}

.news-feature-body {
  padding: 28px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.news-meta time {
  font-size: 12px;
  color: var(--text-2);
}

.news-feature-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-0);
  line-height: 1.4;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-feature-body p {
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-list-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-2);
  border: 1px solid var(--border-0);
  border-radius: 10px;
  padding: 18px 20px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.news-list-item:hover {
  border-color: var(--border-1);
  background: var(--bg-3);
}

.news-list-item .list-content {
  flex: 1;
  min-width: 0;
}

.news-list-item .tag {
  margin-bottom: 6px;
}

.news-list-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-0);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-list-item time {
  font-size: 12px;
  color: var(--text-2);
  margin-top: 4px;
  display: block;
}

.news-list-item .list-arrow {
  color: var(--text-2);
  flex-shrink: 0;
  transition: color 0.2s ease, transform 0.2s ease;
}

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

.news-empty {
  grid-column: 1 / -1;
  background: var(--bg-2);
  border: 1px dashed var(--border-1);
  border-radius: 10px;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--text-2);
}

.news-empty svg {
  width: 40px;
  height: 40px;
  color: var(--text-2);
}

.news-empty p {
  font-size: 14px;
}

/* ===== 结果对比 ===== */
.compare-section {
  background: var(--bg-0);
  padding: 100px 0;
}

.compare-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  position: relative;
  margin-top: 48px;
}

.compare-layout::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: var(--border-0);
}

.compare-col {
  padding: 48px 40px;
}

.compare-col h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 32px;
}

.compare-col.legacy {
  opacity: 0.75;
}

.compare-col.legacy h3 {
  color: var(--text-1);
}

.compare-col.platform h3 {
  color: var(--primary);
}

.compare-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.compare-row:last-child {
  border-bottom: none;
}

.compare-row .row-label {
  font-size: 14px;
  color: var(--text-1);
}

.compare-col.legacy .row-label {
  color: var(--text-2);
}

.compare-row .row-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-0);
  text-align: right;
}

.compare-col.platform .row-value {
  color: var(--primary);
}

.compare-col.platform .row-value.gold {
  color: var(--secondary);
}

.compare-banner {
  margin-top: 48px;
  background: var(--bg-2);
  border: 1px solid var(--border-0);
  border-radius: 10px;
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.compare-banner p {
  font-size: 16px;
  color: var(--text-0);
  font-weight: 600;
  max-width: 700px;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-1);
  border-top: 1px solid var(--border-0);
  padding: 100px 0;
}

.faq-layout {
  display: grid;
  grid-template-columns: 26% 74%;
  gap: 64px;
  margin-top: 48px;
}

.faq-left h2 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-0);
}

.faq-left p {
  font-size: 15px;
  color: var(--text-1);
  line-height: 1.8;
  margin-top: 16px;
}

.faq-left .btn {
  margin-top: 24px;
}

.faq-list {
  display: flex;
  flex-direction: column;
}

.faq-item {
  border-bottom: 1px solid var(--border-0);
}

.faq-item:first-child {
  border-top: 1px solid var(--border-0);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  width: 100%;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-0);
  transition: color 0.2s ease;
}

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

.faq-question .faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--text-2);
}

.faq-item.open .faq-question {
  color: var(--primary);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.8;
  padding-bottom: 22px;
  max-width: 680px;
}

/* ===== 转化表单 ===== */
.contact-section {
  position: relative;
  padding: 100px 0;
  background-image: linear-gradient(to bottom, rgba(10, 14, 20, 0.6), rgba(10, 14, 20, 0.88)),
    url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
}

.contact-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-left h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-0);
  line-height: 1.3;
}

.contact-left .contact-desc {
  font-size: 15px;
  color: var(--text-1);
  line-height: 1.8;
  margin-top: 16px;
}

.contact-info {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-1);
}

.contact-info-item svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-1);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  height: 44px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-0);
  border-radius: 6px;
  color: var(--text-0);
  font-size: 15px;
  padding: 0 16px;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group textarea {
  height: 120px;
  padding: 12px 16px;
  resize: vertical;
  line-height: 1.6;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(31, 210, 134, 0.1);
  outline: none;
}

.form-group input.error,
.form-group textarea.error,
.form-group select.error {
  border-color: var(--danger);
}

.form-error {
  font-size: 12px;
  color: var(--danger);
  margin-top: 4px;
  min-height: 18px;
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%2366727F' stroke-width='2' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

.form-submit {
  margin-top: 4px;
}

.form-privacy {
  font-size: 12px;
  color: var(--text-2);
  text-align: center;
  margin-top: 8px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #070A0E;
  border-top: 1px solid var(--border-0);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.8;
  max-width: 260px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-0);
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: var(--text-1);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-0);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-2);
}

.footer-bottom a {
  color: var(--text-2);
}

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

/* ===== 响应式 ===== */
@media (max-width: 1279px) {
  .container {
    padding: 0 24px;
  }
  .hero h1 {
    font-size: 56px;
  }
}

@media (max-width: 1023px) {
  .section {
    padding: 80px 0;
  }
  .hero h1 {
    font-size: 48px;
  }
  .hero-metrics {
    gap: 32px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .news-layout {
    grid-template-columns: 1fr;
  }
  .compare-layout {
    grid-template-columns: 1fr;
  }
  .compare-layout::before {
    left: 0;
    right: 0;
    top: 50%;
    width: auto;
    height: 1px;
  }
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .contact-card {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 84%;
    max-width: 320px;
    height: 100vh;
    background: var(--bg-0);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 96px 32px 32px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    gap: 20px;
    box-shadow: -20px 0 40px rgba(0, 0, 0, 0.4);
    overflow-y: auto;
  }
  .site-nav.open {
    transform: translateX(0);
  }
  .nav-link {
    font-size: 17px;
    padding: 10px 0;
    width: 100%;
  }
  .nav-link.active::after {
    top: auto;
    bottom: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--primary);
    box-shadow: -8px 0 20px -4px var(--primary-glow);
  }
  .header-actions .btn {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .hero {
    align-items: flex-start;
    padding: 120px 0 60px;
    min-height: auto;
  }
  .hero h1 {
    font-size: 38px;
    line-height: 1.2;
  }
  .hero-subtitle {
    font-size: 16px;
    margin-top: 16px;
  }
  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-metrics {
    flex-direction: column;
    gap: 20px;
    margin-top: 40px;
  }
  .section-title {
    font-size: 30px;
  }
  .stats-section {
    padding: 60px 0;
  }
  .services-section,
  .news-section,
  .compare-section,
  .faq-section,
  .contact-section {
    padding: 60px 0;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .contact-card {
    padding: 32px 24px;
  }
  .compare-col {
    padding: 32px 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    padding: 20px 0;
  }
}

@media (max-width: 639px) {
  .container {
    padding: 0 20px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .compare-col {
    padding: 24px 8px;
  }
  .compare-banner {
    padding: 20px;
  }
  .btn {
    min-height: 44px;
  }
  .form-control {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: article */
:root {
            --bg-0: #0A0E14;
            --bg-1: #0F151C;
            --bg-2: #141B24;
            --bg-3: #1A2330;
            --border-0: #1C2630;
            --border-1: #2C3A4A;
            --text-0: #EDF1F6;
            --text-1: #A6AFBB;
            --text-2: #66727F;
            --primary: #1FD286;
            --primary-deep: #00B56F;
            --primary-glow: rgba(31, 210, 134, 0.35);
            --secondary: #E0B87B;
            --danger: #F4676B;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background: var(--bg-0);
            color: var(--text-1);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus {
            color: var(--primary);
            outline: none;
        }
        a:active {
            color: var(--primary-deep);
        }
        ul,
        ol {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        h1,
        h2,
        h3,
        h4 {
            color: var(--text-0);
            line-height: 1.2;
            margin: 0;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(10, 14, 20, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-0);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            background: rgba(10, 14, 20, 0.95);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-0);
        }
        .brand-icon {
            width: 34px;
            height: 34px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.02em;
            line-height: 1;
        }
        .brand-sub {
            font-size: 12px;
            font-weight: 400;
            color: var(--text-2);
            margin-left: 6px;
            letter-spacing: 0.05em;
        }
        .site-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            position: relative;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-1);
            border-radius: 6px;
            transition: color 0.2s ease;
        }
        .nav-link:hover {
            color: var(--text-0);
        }
        .nav-link.active {
            color: #fff;
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 4px;
            height: 3px;
            border-radius: 999px;
            background: var(--primary);
            box-shadow: 0 8px 20px -6px var(--primary-glow);
            animation: navLineExpand 0.35s ease both;
        }
        @keyframes navLineExpand {
            from {
                width: 0;
                opacity: 0;
            }
            to {
                width: calc(100% - 32px);
                opacity: 1;
            }
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
            line-height: 1;
            user-select: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #07120c;
        }
        .btn-primary:hover {
            background: #3ade9a;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px -8px var(--primary-glow);
            color: #07120c;
        }
        .btn-primary:active {
            transform: translateY(0);
            background: var(--primary-deep);
        }
        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-0);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-secondary:active {
            background: rgba(31, 210, 134, 0.08);
        }
        .btn-sm {
            padding: 10px 20px;
            font-size: 14px;
        }
        .btn-block {
            width: 100%;
        }
        .btn:disabled {
            opacity: 0.4;
            box-shadow: none;
            transform: none;
            cursor: not-allowed;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-0);
            border-radius: 8px;
            color: var(--text-0);
            cursor: pointer;
            transition: border-color 0.2s ease;
        }
        .nav-toggle:hover {
            border-color: var(--primary);
        }
        .nav-toggle svg {
            width: 22px;
            height: 22px;
        }

        /* Article Hero */
        .article-hero {
            background: var(--bg-0);
            padding: 140px 0 40px;
            position: relative;
            border-bottom: 1px solid var(--border-0);
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 220px;
            background: url('/assets/images/backpic/back-1.webp') center 30%/cover no-repeat;
            opacity: 0.18;
            border-bottom: 1px solid var(--border-0);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-2);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-2);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-2);
            opacity: 0.5;
        }
        .breadcrumb .current {
            color: var(--text-0);
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .article-title {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 900;
            color: var(--text-0);
            line-height: 1.2;
            max-width: 860px;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
            color: var(--text-2);
        }
        .article-meta .meta-divider {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--border-1);
        }
        .article-meta .meta-cat {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(31, 210, 134, 0.1);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
        }
        .article-meta .meta-views {
            font-family: 'DIN Alternate', 'Barlow Condensed', sans-serif;
            font-variant-numeric: tabular-nums;
        }

        /* Article Body */
        .article-section {
            padding: 48px 0 64px;
            background: var(--bg-0);
        }
        .article-layout {
            max-width: 860px;
            margin: 0 auto;
        }
        .article-body {
            max-width: 720px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-1);
        }
        .article-body>* {
            margin-bottom: 24px;
        }
        .article-body h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-0);
            margin-top: 48px;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-0);
            line-height: 1.3;
        }
        .article-body h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-0);
            margin-top: 36px;
            margin-bottom: 14px;
            line-height: 1.35;
        }
        .article-body h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-0);
            margin-top: 28px;
            margin-bottom: 12px;
        }
        .article-body p {
            margin-bottom: 20px;
            line-height: 1.85;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--primary-deep);
            text-decoration: none;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 24px 0;
            padding-left: 24px;
        }
        .article-body ul li,
        .article-body ol li {
            margin-bottom: 8px;
            position: relative;
            line-height: 1.7;
        }
        .article-body ul li {
            list-style: none;
            padding-left: 20px;
        }
        .article-body ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            border-radius: 2px;
            background: var(--primary);
            opacity: 0.7;
        }
        .article-body ol {
            counter-reset: article-ol;
        }
        .article-body ol li {
            list-style: none;
            counter-increment: article-ol;
            padding-left: 4px;
        }
        .article-body ol li::before {
            content: counter(article-ol) ".";
            font-weight: 700;
            color: var(--primary);
            margin-right: 8px;
            font-variant-numeric: tabular-nums;
        }
        .article-body blockquote {
            border-left: 3px solid var(--primary);
            background: var(--bg-1);
            padding: 20px 24px;
            margin: 28px 0;
            border-radius: 0 10px 10px 0;
            color: var(--text-1);
            font-size: 15px;
            line-height: 1.8;
        }
        .article-body blockquote p:last-child {
            margin-bottom: 0;
        }
        .article-body img {
            max-width: 100%;
            border-radius: 8px;
            margin: 28px 0;
            border: 1px solid var(--border-0);
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 14px;
            background: var(--bg-1);
            border-radius: 8px;
            overflow: hidden;
        }
        .article-body table th,
        .article-body table td {
            padding: 12px 16px;
            border: 1px solid var(--border-0);
            text-align: left;
            line-height: 1.5;
        }
        .article-body table th {
            background: var(--bg-2);
            color: var(--text-0);
            font-weight: 600;
            white-space: nowrap;
        }
        .article-body table td {
            color: var(--text-1);
        }
        .article-body table tr:hover td {
            background: var(--bg-2);
        }
        .article-body code {
            font-family: 'SF Mono', 'Consolas', monospace;
            font-size: 14px;
            background: var(--bg-1);
            padding: 2px 6px;
            border-radius: 4px;
            color: var(--primary);
        }
        .article-body pre {
            background: var(--bg-1);
            padding: 20px;
            border-radius: 8px;
            overflow-x: auto;
            margin: 24px 0;
            border: 1px solid var(--border-0);
        }
        .article-body pre code {
            background: none;
            padding: 0;
            color: var(--text-1);
        }
        .article-body hr {
            border: none;
            border-top: 1px solid var(--border-0);
            margin: 40px 0;
        }
        .article-body .data-block {
            background: var(--bg-1);
            border: 1px solid var(--border-0);
            border-left: 3px solid var(--secondary);
            padding: 20px 24px;
            border-radius: 0 8px 8px 0;
            font-family: 'DIN Alternate', 'Barlow Condensed', sans-serif;
            font-variant-numeric: tabular-nums;
            color: var(--text-0);
            font-size: 16px;
            line-height: 1.8;
            margin: 28px 0;
        }
        .not-found {
            max-width: 720px;
            margin: 60px auto;
            text-align: center;
            padding: 60px 24px;
            background: var(--bg-2);
            border: 1px solid var(--border-0);
            border-radius: 10px;
        }
        .not-found p {
            font-size: 18px;
            color: var(--text-1);
            margin-bottom: 20px;
        }
        .not-found a {
            color: var(--primary);
            font-weight: 600;
        }

        /* Tags & Post Nav */
        .article-extras {
            padding: 20px 0 60px;
            border-bottom: 1px solid var(--border-0);
            background: var(--bg-0);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            max-width: 720px;
            margin: 0 auto 40px;
        }
        .article-tags .tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(31, 210, 134, 0.08);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            transition: background 0.2s;
        }
        .article-tags .tag:hover {
            background: rgba(31, 210, 134, 0.2);
            color: var(--primary);
        }
        .post-nav {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            max-width: 720px;
            margin: 0 auto;
            padding-top: 32px;
            border-top: 1px solid var(--border-0);
        }
        .post-nav-item {
            display: flex;
            flex-direction: column;
            gap: 6px;
            padding: 14px 18px;
            background: var(--bg-2);
            border: 1px solid var(--border-0);
            border-radius: 8px;
            min-width: 0;
            max-width: 48%;
            transition: border-color 0.2s, background 0.2s;
        }
        .post-nav-item:hover {
            border-color: var(--primary);
            background: var(--bg-3);
        }
        .post-nav-item .nav-label {
            font-size: 12px;
            color: var(--text-2);
        }
        .post-nav-item .nav-title {
            font-size: 15px;
            color: var(--text-0);
            font-weight: 600;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .post-nav-next {
            text-align: right;
            margin-left: auto;
        }

        /* Related Posts */
        .related-section {
            padding: 80px 0;
            background: var(--bg-1);
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 40px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-title {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            letter-spacing: -0.01em;
        }
        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-1);
            transition: color 0.2s;
        }
        .section-link:hover {
            color: var(--primary);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-2);
            border: 1px solid var(--border-0);
            border-radius: 10px;
            overflow: hidden;
            transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
            position: relative;
        }
        .related-card:hover {
            border-color: var(--border-1);
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
        }
        .related-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
            z-index: 2;
        }
        .related-card:hover::before {
            transform: scaleX(1);
        }
        .related-card .card-img {
            height: 150px;
            width: 100%;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-cat {
            display: inline-block;
            font-size: 12px;
            color: var(--primary);
            background: rgba(31, 210, 134, 0.08);
            padding: 3px 10px;
            border-radius: 999px;
            margin-bottom: 12px;
            font-weight: 600;
        }
        .related-card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-0);
            line-height: 1.4;
            margin-bottom: 10px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .related-card .card-desc {
            font-size: 14px;
            color: var(--text-1);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .related-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-2);
        }
        .related-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
            transition: gap 0.2s;
        }
        .related-card:hover .card-link {
            gap: 8px;
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-0);
            position: relative;
        }
        .cta-card {
            max-width: 1000px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-0);
            border-radius: 10px;
            padding: 48px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            position: relative;
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-info,
        .contact-form {
            position: relative;
            z-index: 2;
        }
        .cta-info h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-info p {
            font-size: 15px;
            color: var(--text-1);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .cta-info .contact-line {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-1);
            margin-bottom: 12px;
        }
        .cta-info .contact-line svg {
            width: 18px;
            height: 18px;
            color: var(--primary);
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-1);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-0);
            border-radius: 6px;
            padding: 10px 14px;
            color: var(--text-0);
            font-size: 14px;
            transition: border-color 0.2s, box-shadow 0.2s;
            height: 44px;
        }
        .form-group textarea {
            height: auto;
            min-height: 90px;
            resize: vertical;
        }
        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-2);
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px var(--primary-glow);
        }
        .form-group select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23A6AFBB' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            padding-right: 36px;
        }
        .form-group .error-text {
            display: block;
            font-size: 12px;
            color: var(--danger);
            margin-top: 4px;
            min-height: 16px;
        }
        .contact-form .btn {
            margin-top: 4px;
        }
        .form-hint {
            font-size: 12px;
            color: var(--text-2);
            margin-top: 10px;
            text-align: center;
        }

        /* Footer */
        .site-footer {
            background: #070A0E;
            border-top: 1px solid var(--border-0);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .brand {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-0);
            margin-bottom: 18px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-1);
            transition: color 0.2s;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-0);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-2);
        }
        .footer-bottom a {
            color: var(--text-2);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* Animations */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-up {
            opacity: 0;
            animation: fadeUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.25s;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .site-nav {
                display: none;
            }
            .site-nav.open {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: 72px;
                right: 0;
                background: var(--bg-0);
                padding: 24px;
                gap: 4px;
                width: 280px;
                height: calc(100vh - 72px);
                border-left: 1px solid var(--border-0);
                box-shadow: -12px 0 40px rgba(0, 0, 0, 0.4);
            }
            .site-nav.open .nav-link {
                padding: 14px 16px;
                width: 100%;
                border-radius: 8px;
            }
            .site-nav.open .nav-link.active::after {
                left: 0;
                top: 50%;
                transform: translateY(-50%);
                width: 3px;
                height: 24px;
                background: var(--primary);
                box-shadow: 0 0 20px -4px var(--primary-glow);
                border-radius: 999px;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .cta-card {
                grid-template-columns: 1fr;
                padding: 32px 24px;
            }
        }
        @media (max-width: 767px) {
            .header-inner {
                height: 64px;
            }
            .brand-text {
                font-size: 18px;
            }
            .article-hero {
                padding: 110px 0 32px;
            }
            .article-title {
                font-size: 28px;
            }
            .article-body {
                font-size: 15px;
            }
            .article-body h2 {
                font-size: 23px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .post-nav {
                flex-direction: column;
            }
            .post-nav-item {
                max-width: 100%;
            }
            .post-nav-next {
                margin-left: 0;
                text-align: left;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
            .cta-card {
                padding: 24px 18px;
            }
            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-actions .btn {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .brand-sub {
                display: none;
            }
            .article-meta {
                gap: 8px;
            }
        }

/* roulang page: category1 */
:root {
    --bg-0: #0A0E14;
    --bg-1: #0F151C;
    --bg-2: #141B24;
    --bg-3: #1A2330;
    --border-0: #1C2630;
    --border-1: #2C3A4A;
    --text-0: #EDF1F6;
    --text-1: #A6AFBB;
    --text-2: #66727F;
    --primary: #1FD286;
    --primary-deep: #00B56F;
    --primary-glow: rgba(31, 210, 134, 0.35);
    --secondary: #E0B87B;
    --danger: #F4676B;
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg-0);
    color: var(--text-0);
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    line-height: 1.75;
    font-size: 15px;
    overflow-x: hidden;
  }

  a {
    color: var(--text-1);
    text-decoration: none;
    transition: color 0.2s ease;
  }

  a:hover { color: var(--primary); }
  a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }

  img { max-width: 100%; display: block; }
  ul, ol { list-style: none; }
  button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

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

  /* ====== Site Header ====== */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 14, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-0);
    transition: background 0.3s ease, box-shadow 0.3s ease;
  }

  .site-header.scrolled {
    background: rgba(10, 14, 20, 0.95);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  }

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

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    flex-shrink: 0;
  }

  .brand-icon {
    width: 36px;
    height: 36px;
    color: var(--primary);
  }

  .brand-text {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 0.02em;
    line-height: 1.2;
  }

  .brand-sub {
    display: block;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-2);
    letter-spacing: 0.12em;
    margin-top: 2px;
  }

  .site-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-left: auto;
  }

  .nav-link {
    position: relative;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-1);
    padding: 8px 2px;
    line-height: 1.4;
    transition: color 0.2s ease;
  }

  .nav-link:hover { color: var(--text-0); }

  .nav-link.active {
    color: #fff;
    font-weight: 600;
  }

  .nav-link.active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 3px;
    border-radius: 2px;
    background: var(--primary);
    box-shadow: 0 8px 20px -6px var(--primary-glow);
  }

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

  .nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-1);
    color: var(--text-0);
    transition: border-color 0.2s ease, color 0.2s ease;
  }

  .nav-toggle:hover { border-color: var(--primary); color: var(--primary); }
  .nav-toggle svg { width: 22px; height: 22px; }

  /* ====== Buttons ====== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
    padding: 0 24px;
    height: 46px;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    white-space: nowrap;
  }

  .btn-primary {
    background: var(--primary);
    color: #08120A;
    box-shadow: 0 4px 16px rgba(31, 210, 134, 0.18);
  }

  .btn-primary:hover {
    background: #2EE09A;
    color: #08120A;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(31, 210, 134, 0.3);
  }

  .btn-primary:active {
    transform: translateY(0);
    background: var(--primary-deep);
  }

  .btn-sm { height: 38px; padding: 0 18px; font-size: 14px; }

  .btn-ghost {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-0);
  }

  .btn-ghost:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
  }

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

  .btn-block { width: 100%; }

  /* ====== Category Hero ====== */
  .category-hero {
    position: relative;
    padding: 160px 0 80px;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
  }

  .category-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 14, 20, 0.88) 0%, rgba(10, 14, 20, 0.68) 60%, rgba(10, 14, 20, 0.55) 100%);
  }

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

  .breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: var(--text-2);
    margin-bottom: 24px;
  }

  .breadcrumb a { color: var(--text-2); transition: color 0.2s ease; }
  .breadcrumb a:hover { color: var(--primary); }
  .breadcrumb .sep { color: var(--text-2); opacity: 0.6; }
  .breadcrumb .current { color: var(--text-0); }

  .category-hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.01em;
    color: var(--text-0);
    margin-bottom: 16px;
    max-width: 640px;
  }

  .category-hero .hero-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-1);
    max-width: 620px;
    margin-bottom: 0;
  }

  /* ====== Category Main (Two Columns) ====== */
  .category-main { padding: 80px 0 24px; }

  .category-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
  }

  .category-content-title {
    font-size: 28px;
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-0);
    margin-bottom: 8px;
  }

  .category-content-sub {
    font-size: 14px;
    color: var(--text-2);
    margin-bottom: 32px;
  }

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

  .content-card {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 24px;
    background: var(--bg-2);
    border: 1px solid var(--border-0);
    border-radius: 10px;
    padding: 16px;
    position: relative;
    overflow: hidden;
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  }

  .content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
  }

  .content-card:hover {
    background: var(--bg-3);
    border-color: var(--border-1);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  }

  .content-card:hover::before { transform: scaleX(1); }

  .content-card .card-img {
    border-radius: 8px;
    overflow: hidden;
    height: 160px;
  }

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

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

  .card-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8px 4px;
  }

  .card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-2);
    margin-bottom: 8px;
  }

  .badge {
    display: inline-flex;
    align-items: center;
    background: rgba(31, 210, 134, 0.1);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    padding: 2px 12px;
    border-radius: 999px;
    letter-spacing: 0.02em;
  }

  .card-info h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 8px;
    line-height: 1.4;
  }

  .card-info p {
    font-size: 14px;
    color: var(--text-1);
    line-height: 1.7;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
  }

  .card-link svg { width: 16px; height: 16px; transition: transform 0.2s ease; }
  .card-link:hover svg { transform: translateX(4px); }

  /* ====== Sidebar ====== */
  .category-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .sidebar-card {
    background: var(--bg-2);
    border: 1px solid var(--border-0);
    border-radius: 10px;
    padding: 24px;
  }

  .sidebar-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-0);
    position: relative;
  }

  .sidebar-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 36px;
    height: 2px;
    background: var(--primary);
  }

  .subcat-list li { margin-bottom: 10px; }

  .subcat-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    border-radius: 6px;
    font-size: 14px;
    color: var(--text-1);
    transition: background 0.2s ease, color 0.2s ease;
  }

  .subcat-list a:hover {
    background: var(--bg-3);
    color: var(--primary);
  }

  .subcat-list .count {
    font-size: 12px;
    color: var(--text-2);
    background: var(--bg-1);
    padding: 2px 8px;
    border-radius: 999px;
  }

  .contact-card .sidebar-title { color: var(--text-0); }

  .contact-card p {
    font-size: 14px;
    color: var(--text-1);
    line-height: 1.75;
    margin-bottom: 20px;
  }

  .contact-card .btn { width: 100%; }

  .contact-note {
    font-size: 12px;
    color: var(--text-2);
    margin-top: 12px;
    text-align: center;
    line-height: 1.6;
  }

  /* ====== Dimension Section ====== */
  .dimension-section { padding: 80px 0; background: var(--bg-1); }

  .section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 40px;
  }

  .section-head h2 {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-0);
  }

  .section-head .sec-num {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.08em;
    display: block;
    margin-bottom: 6px;
  }

  .section-head p {
    font-size: 14px;
    color: var(--text-2);
    max-width: 400px;
  }

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

  .dimension-card {
    background: var(--bg-2);
    border: 1px solid var(--border-0);
    border-radius: 10px;
    padding: 32px 24px;
    transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
  }

  .dimension-card:hover {
    background: var(--bg-3);
    border-color: var(--border-1);
    transform: translateY(-4px);
  }

  .dimension-card .d-icon {
    width: 44px;
    height: 44px;
    color: var(--primary);
    margin-bottom: 18px;
  }

  .dimension-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 8px;
  }

  .dimension-card p {
    font-size: 14px;
    color: var(--text-1);
    line-height: 1.7;
  }

  /* ====== Process Section ====== */
  .process-section { padding: 80px 0; }

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

  .process-step {
    position: relative;
    padding: 32px 24px;
    background: var(--bg-2);
    border: 1px solid var(--border-0);
    border-radius: 10px;
    text-align: left;
  }

  .process-step .step-num {
    font-size: 44px;
    font-weight: 800;
    color: rgba(31, 210, 134, 0.18);
    line-height: 1;
    margin-bottom: 16px;
    font-family: 'DIN Alternate', 'Barlow Condensed', sans-serif;
  }

  .process-step h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 8px;
  }

  .process-step p {
    font-size: 14px;
    color: var(--text-1);
    line-height: 1.7;
  }

  /* ====== FAQ Section ====== */
  .faq-section { padding: 80px 0; background: var(--bg-1); }

  .faq-layout {
    display: grid;
    grid-template-columns: 26% 1fr;
    gap: 48px;
  }

  .faq-intro h2 {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.25;
    color: var(--text-0);
    margin-bottom: 16px;
  }

  .faq-intro p {
    font-size: 14px;
    color: var(--text-1);
    line-height: 1.8;
    margin-bottom: 24px;
  }

  .faq-list {
    display: flex;
    flex-direction: column;
  }

  .faq-item {
    border-bottom: 1px solid var(--border-0);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    padding: 20px 4px;
    text-align: left;
    color: var(--text-0);
    font-size: 16px;
    font-weight: 600;
    transition: color 0.2s ease;
  }

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

  .faq-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--text-2);
    transition: transform 0.3s ease, color 0.3s ease;
  }

  .faq-item.open .faq-icon { transform: rotate(45deg); color: var(--primary); }
  .faq-item.open .faq-question { color: var(--primary); }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .faq-answer-inner {
    padding: 0 4px 20px;
    font-size: 14px;
    color: var(--text-1);
    line-height: 1.8;
  }

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

  /* ====== CTA Section ====== */
  .cta-section {
    padding: 80px 0;
    position: relative;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(10, 14, 20, 0.82);
  }

  .cta-section .container { position: relative; z-index: 2; }

  .cta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .cta-info h2 {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-0);
    line-height: 1.25;
    margin-bottom: 16px;
  }

  .cta-info p {
    font-size: 15px;
    color: var(--text-1);
    line-height: 1.8;
    margin-bottom: 24px;
    max-width: 440px;
  }

  .cta-contact-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 0;
  }

  .cta-contact-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-1);
  }

  .cta-contact-list svg {
    width: 18px;
    height: 18px;
    color: var(--primary);
    flex-shrink: 0;
  }

  .cta-form-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 32px;
  }

  .form-group { margin-bottom: 18px; }

  .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-1);
    margin-bottom: 6px;
    letter-spacing: 0.03em;
  }

  .form-control {
    width: 100%;
    height: 44px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-0);
    border-radius: 6px;
    padding: 0 14px;
    color: var(--text-0);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(31, 210, 134, 0.12);
    outline: none;
  }

  .form-control::placeholder { color: var(--text-2); }

  select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none' stroke='%2366727F' stroke-width='1.5'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 38px; }

  textarea.form-control {
    height: 110px;
    padding: 12px 14px;
    resize: vertical;
    line-height: 1.6;
  }

  .form-tip {
    font-size: 12px;
    color: var(--text-2);
    margin-top: 12px;
    text-align: center;
    line-height: 1.6;
  }

  /* ====== Footer ====== */
  .site-footer {
    background: #070A0E;
    border-top: 1px solid var(--border-0);
    padding-top: 60px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 40px;
  }

  .footer-brand { max-width: 280px; }
  .footer-brand .brand { margin-bottom: 16px; }
  .footer-brand p { font-size: 14px; color: var(--text-2); line-height: 1.7; }

  .footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 16px;
  }

  .footer-col ul li { margin-bottom: 10px; }
  .footer-col ul a { font-size: 14px; color: var(--text-1); transition: color 0.2s ease; }
  .footer-col ul a:hover { color: var(--primary); }

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding: 20px 0;
    border-top: 1px solid var(--border-0);
    font-size: 12px;
    color: var(--text-2);
  }

  .footer-bottom a { color: var(--text-2); }
  .footer-bottom a:hover { color: var(--primary); }

  /* ====== Reveal Animation ====== */
  .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* ====== Responsive ====== */
  @media (max-width: 1023px) {
    .category-hero h1 { font-size: 42px; }
    .category-layout { grid-template-columns: 1fr; }
    .dimension-grid { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(2, 1fr); }
    .cta-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
  }

  @media (max-width: 767px) {
    .site-nav {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      background: var(--bg-0);
      flex-direction: column;
      align-items: stretch;
      padding: 16px 24px 24px;
      gap: 4px;
      border-bottom: 1px solid var(--border-0);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }

    .site-nav.open { display: flex; }

    .nav-link {
      display: block;
      padding: 14px 8px;
      font-size: 16px;
      border-radius: 6px;
      color: var(--text-1);
    }

    .nav-link:hover { background: var(--bg-2); color: var(--text-0); }

    .nav-link.active {
      color: var(--primary);
      background: rgba(31, 210, 134, 0.06);
    }

    .nav-link.active::after { display: none; }

    .nav-toggle { display: inline-flex; }

    .category-hero { padding: 130px 0 56px; }
    .category-hero h1 { font-size: 34px; }
    .content-card { grid-template-columns: 1fr; gap: 16px; }
    .content-card .card-img { height: 180px; }
    .faq-layout { grid-template-columns: 1fr; gap: 32px; }
    .section-head { flex-direction: column; align-items: flex-start; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; }
  }

  @media (max-width: 639px) {
    .container { padding: 0 20px; }
    .dimension-grid { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr; }
    .cta-form-card { padding: 24px 20px; }
    .form-control, select.form-control, .btn { height: 48px; }
    .btn { min-height: 44px; }
    .category-hero h1 { font-size: 30px; }
    .section-head h2 { font-size: 28px; }
    .cta-info h2 { font-size: 28px; }
  }

  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; }
  }

/* roulang page: category2 */
:root {
  --bg-0: #0A0E14;
  --bg-1: #0F151C;
  --bg-2: #141B24;
  --bg-3: #1A2330;
  --border-0: #1C2630;
  --border-1: #2C3A4A;
  --text-0: #EDF1F6;
  --text-1: #A6AFBB;
  --text-2: #66727F;
  --primary: #1FD286;
  --primary-deep: #00B56F;
  --primary-glow: rgba(31, 210, 134, 0.35);
  --secondary: #E0B87B;
  --danger: #F4676B;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.35);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-0);
  color: var(--text-0);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; width: 100%;
  z-index: 100;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-0);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: rgba(10, 14, 20, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 36px;
  height: 36px;
  color: var(--primary);
}
.brand-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--text-0);
  line-height: 1.2;
  white-space: nowrap;
}
.brand-sub {
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  margin-left: 2px;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  position: relative;
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-1);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-link:hover {
  color: var(--text-0);
  background: rgba(255, 255, 255, 0.04);
}
.nav-link.active {
  color: var(--text-0);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 3px;
  border-radius: 99px;
  background: var(--primary);
  box-shadow: 0 8px 20px -6px var(--primary-glow);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-0);
  border-radius: var(--radius-sm);
  color: var(--text-0);
}
.nav-toggle svg { width: 24px; height: 24px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-primary {
  background: var(--primary);
  color: #08130C;
}
.btn-primary:hover {
  background: #2FE59A;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -8px var(--primary-glow);
}
.btn-primary:active {
  transform: translateY(0);
  background: var(--primary-deep);
}
.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-0);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:active {
  transform: translateY(0);
  border-color: var(--primary-deep);
  color: var(--primary-deep);
}
.btn:disabled {
  opacity: 0.4;
  box-shadow: none;
  transform: none;
  cursor: not-allowed;
}
.btn-lg { padding: 16px 32px; font-size: 16px; }

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: 150px 0 80px;
  background: linear-gradient(100deg, rgba(10, 14, 20, 0.92) 0%, rgba(10, 14, 20, 0.78) 45%, rgba(10, 14, 20, 0.5) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid var(--border-0);
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-2); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-2); opacity: 0.6; }
.breadcrumb .current { color: var(--text-0); font-weight: 500; }
.hero-title {
  font-size: 56px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-0);
  max-width: 720px;
}
.hero-title .highlight {
  color: var(--primary);
}
.hero-desc {
  margin-top: 16px;
  font-size: 17px;
  color: var(--text-1);
  max-width: 640px;
  line-height: 1.8;
}
.hero-actions {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-metrics {
  margin-top: 52px;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--border-0);
  padding-top: 28px;
}
.hero-metric {
  flex: 1 1 220px;
  padding-right: 32px;
  min-width: 180px;
}
.hero-metric + .hero-metric {
  border-left: 1px solid var(--border-0);
  padding-left: 32px;
}
.hero-metric .num {
  font-family: "DIN Alternate", "Barlow Condensed", "Arial Narrow", sans-serif;
  font-size: 30px;
  font-weight: 800;
  color: var(--text-0);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.hero-metric .num em { font-style: normal; font-size: 16px; color: var(--text-1); margin-left: 2px; }
.hero-metric .label {
  font-size: 13px;
  color: var(--text-2);
  margin-top: 4px;
}

/* ===== Section base ===== */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-1); }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 48px;
}
.section-head .kicker {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}
.section-title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text-0);
}
.section-sub {
  margin-top: 10px;
  font-size: 16px;
  color: var(--text-1);
  max-width: 560px;
}
.section-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  padding: 8px 0;
  flex-shrink: 0;
}
.section-link:hover { color: #2FE59A; }
.section-link svg { width: 18px; height: 18px; transition: transform 0.2s ease; }
.section-link:hover svg { transform: translateX(4px); }

/* ===== Metrics strip ===== */
.metrics-strip {
  background: var(--bg-1);
  border-bottom: 1px solid var(--border-0);
  padding: 40px 0;
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.metric-item {
  padding: 8px 0;
}
.metric-item .label {
  font-size: 13px;
  color: var(--text-2);
  font-weight: 500;
}
.metric-item .value {
  font-family: "DIN Alternate", "Barlow Condensed", sans-serif;
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-0);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  margin: 6px 0 10px;
}
.metric-item .value .unit {
  font-size: 18px;
  color: var(--text-1);
  font-weight: 600;
  margin-left: 2px;
}
.metric-item .bar {
  height: 2px;
  width: 40px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.6s ease;
}
.metric-item .bar.gold { background: var(--secondary); }

/* ===== Capability cards ===== */
.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.service-card {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--border-0);
  border-radius: var(--radius);
  padding: 32px 28px;
  min-height: 220px;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  height: 2px;
  width: 0;
  background: var(--primary);
  transition: width 0.3s ease;
}
.service-card:hover {
  background: var(--bg-3);
  border-color: var(--border-1);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.service-card:hover::before { width: 100%; }
.service-card .icon {
  width: 44px;
  height: 44px;
  color: var(--primary);
  margin-bottom: 18px;
}
.service-card .icon svg { width: 44px; height: 44px; }
.service-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 8px;
}
.service-card p {
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.75;
}
.service-card.featured {
  border-color: rgba(224, 184, 123, 0.5);
}
.service-card.featured::before {
  background: var(--secondary);
}
.service-card.featured:hover {
  border-color: var(--primary);
}
.service-card.featured h3 { color: var(--secondary); }

/* ===== Scenarios ===== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--bg-2);
  border: 1px solid var(--border-0);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-1);
}
.scenario-card .cover {
  position: relative;
  height: 186px;
  overflow: hidden;
}
.scenario-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.scenario-card:hover .cover img { transform: scale(1.04); }
.scenario-card .cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 14, 20, 0) 40%, rgba(10, 14, 20, 0.55) 100%);
}
.scenario-card .tag {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  background: rgba(10, 14, 20, 0.75);
  border: 1px solid var(--border-1);
  color: var(--text-0);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}
.scenario-card .body {
  padding: 24px;
}
.scenario-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 8px;
}
.scenario-card p {
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.7;
}
.scenario-card .more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.scenario-card .more svg { width: 16px; height: 16px; transition: transform 0.2s ease; }
.scenario-card .more:hover svg { transform: translateX(4px); }

/* ===== Process ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}
.process-step {
  position: relative;
  padding: 32px 8px 0;
}
.process-step::before {
  content: "";
  position: absolute;
  top: 52px;
  left: 24px;
  right: -12px;
  height: 1px;
  background: var(--border-1);
  z-index: 0;
}
.process-step:last-child::before { display: none; }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  color: var(--primary);
  font-family: "DIN Alternate", "Barlow Condensed", sans-serif;
  font-size: 20px;
  font-weight: 800;
  position: relative;
  z-index: 1;
  margin-bottom: 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.process-step:hover .step-num {
  border-color: var(--primary);
  box-shadow: 0 0 20px -4px var(--primary-glow);
}
.process-step h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 6px;
}
.process-step p {
  font-size: 13px;
  color: var(--text-1);
  line-height: 1.65;
}

/* ===== Compare ===== */
.compare-wrap {
  background: var(--bg-2);
  border: 1px solid var(--border-0);
  border-radius: var(--radius);
  overflow: hidden;
}
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.compare-col {
  padding: 40px 40px 32px;
}
.compare-col + .compare-col {
  border-left: 1px solid var(--border-0);
}
.compare-col h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.compare-col.traditional h3 { color: var(--text-1); }
.compare-col.platform h3 { color: var(--primary); }
.compare-list { list-style: none; display: flex; flex-direction: column; gap: 0; }
.compare-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(28, 38, 48, 0.6);
  font-size: 14px;
}
.compare-list li:last-child { border-bottom: none; }
.compare-list .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 10px;
}
.compare-col.traditional .dot { background: var(--text-2); }
.compare-col.platform .dot { background: var(--primary); }
.compare-col.platform .dot.gold { background: var(--secondary); }
.compare-list .text { color: var(--text-1); }
.compare-col.platform .text { color: var(--text-0); font-weight: 500; }
.compare-col.platform .text strong { color: var(--primary); font-weight: 700; }
.compare-col.platform .text .gold { color: var(--secondary); }
.compare-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--bg-1);
  border-top: 1px solid var(--border-0);
  padding: 24px 40px;
  flex-wrap: wrap;
}
.compare-banner p {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-0);
}
.compare-banner p span { color: var(--primary); }
.compare-banner .btn { flex-shrink: 0; }

/* ===== FAQ ===== */
.faq-wrap {
  display: grid;
  grid-template-columns: 26% 74%;
  gap: 48px;
}
.faq-side .section-title { font-size: 32px; }
.faq-side p { font-size: 14px; color: var(--text-1); margin-top: 12px; line-height: 1.75; }
.faq-side .btn { margin-top: 24px; }
.faq-list { border-top: 1px solid var(--border-0); }
.faq-item { border-bottom: 1px solid var(--border-0); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  text-align: left;
  padding: 22px 4px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-0);
  transition: color 0.2s ease;
}
.faq-q:hover { color: var(--primary); }
.faq-item.active .faq-q { color: var(--primary); font-weight: 700; }
.faq-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s ease;
}
.faq-icon::before { width: 14px; height: 2px; }
.faq-icon::after { width: 2px; height: 14px; }
.faq-item.active .faq-icon::after { transform: rotate(90deg); opacity: 0; }
.faq-item.active .faq-icon::before { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-a .inner {
  padding: 0 4px 22px;
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.8;
  max-width: 640px;
}

/* ===== CTA / Contact ===== */
.contact-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(0deg, rgba(10, 14, 20, 0.82) 0%, rgba(10, 14, 20, 0.9) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-top: 1px solid var(--border-0);
}
.contact-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-0);
  border-radius: var(--radius);
  padding: 48px;
}
.contact-left h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-0);
  line-height: 1.3;
}
.contact-left h2 span { color: var(--primary); }
.contact-left > p {
  margin-top: 16px;
  color: var(--text-1);
  font-size: 15px;
  line-height: 1.8;
}
.contact-meta {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-meta .item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-1);
  font-size: 15px;
}
.contact-meta .item svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
  flex-shrink: 0;
}
.contact-meta .item a:hover { color: var(--primary); }
.schedule-note {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-0);
  font-size: 13px;
  color: var(--text-2);
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-0);
  letter-spacing: 0.02em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-0);
  border-radius: var(--radius-sm);
  color: var(--text-0);
  font-size: 15px;
  padding: 12px 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-group input { height: 44px; }
.form-group textarea { height: 120px; resize: vertical; }
.form-group select {
  height: 44px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%23A6AFBB' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-2);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  outline: none;
}
.form-group input.is-invalid,
.form-group select.is-invalid,
.form-group textarea.is-invalid {
  border-color: var(--danger);
}
.form-error {
  font-size: 12px;
  color: var(--danger);
  min-height: 16px;
}
.form-submit {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-submit .btn { width: 100%; }
.form-submit .btn.success {
  background: var(--primary);
  color: #08130C;
}
.form-privacy {
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.6;
}

/* ===== Footer ===== */
.site-footer {
  background: #070A0E;
  border-top: 1px solid var(--border-0);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .brand-text { font-size: 20px; }
.footer-brand p {
  margin-top: 18px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-col a {
  font-size: 14px;
  color: var(--text-1);
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border-0);
  font-size: 12px;
  color: var(--text-2);
}
.footer-bottom a { color: var(--text-2); }
.footer-bottom a:hover { color: var(--primary); }

/* ===== Animations ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-title, .hero-desc, .hero-actions, .hero-metrics {
  opacity: 0;
  animation: fadeUp 0.65s ease forwards;
}
.hero-title { animation-delay: 0.1s; }
.hero-desc { animation-delay: 0.25s; }
.hero-actions { animation-delay: 0.35s; }
.hero-metrics { animation-delay: 0.45s; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .container { padding-left: 20px; padding-right: 20px; }
  .hero-title { font-size: 48px; }
  .section { padding: 80px 0; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(3, 1fr); row-gap: 32px; }
  .process-step:nth-child(n)::before { display: none; }
  .faq-wrap { grid-template-columns: 1fr; gap: 32px; }
  .contact-card { grid-template-columns: 1fr; padding: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-0);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border-0);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
  .site-nav.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-link {
    padding: 14px 12px;
    font-size: 16px;
  }
  .nav-link.active::after {
    left: auto;
    right: auto;
    width: 3px;
    height: 24px;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
    left: 0;
  }
  .nav-toggle { display: inline-flex; }
  .header-actions .btn { display: none; }
  .hero-title { font-size: 40px; }
  .hero-desc { font-size: 16px; }
  .hero-metrics { flex-direction: column; gap: 16px; }
  .hero-metric { padding: 0; }
  .hero-metric + .hero-metric {
    border-left: none;
    border-top: 1px solid var(--border-0);
    padding: 16px 0 0;
  }
  .capability-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  .compare-col + .compare-col {
    border-left: none;
    border-top: 1px solid var(--border-0);
  }
  .compare-banner { padding: 20px; }
  .section-title { font-size: 30px; }
  .faq-q { font-size: 15px; padding: 18px 2px; }
  .contact-section { padding: 72px 0; }
  .contact-card { padding: 24px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group.full { grid-column: auto; }
  .form-submit { grid-column: auto; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 640px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .hero-title { font-size: 34px; }
  .hero-desc { font-size: 15px; }
  .section { padding: 64px 0; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* roulang page: category3 */
:root {
    --bg-0: #0A0E14;
    --bg-1: #0F151C;
    --bg-2: #141B24;
    --bg-3: #1A2330;
    --border-0: #1C2630;
    --border-1: #2C3A4A;
    --text-0: #EDF1F6;
    --text-1: #A6AFBB;
    --text-2: #66727F;
    --primary: #1FD286;
    --primary-deep: #00B56F;
    --primary-glow: rgba(31, 210, 134, 0.35);
    --secondary: #E0B87B;
    --danger: #F4676B;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--bg-0);
    color: var(--text-1);
    font-family: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

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

  a:hover,
  a:focus,
  a:active {
    color: inherit;
    outline: none;
  }

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

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

  button {
    font-family: inherit;
  }

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

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    font-weight: 600;
    transition: all .25s ease;
    cursor: pointer;
    border: 1px solid transparent;
    letter-spacing: 0.02em;
  }

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

  .btn-lg {
    padding: 14px 32px;
    font-size: 16px;
  }

  .btn-primary {
    background: var(--primary);
    color: #0A0E14;
  }

  .btn-primary:hover {
    background: #2EDC94;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(31, 210, 134, 0.25);
  }

  .btn-primary:active {
    transform: translateY(0);
    background: var(--primary-deep);
  }

  .btn-outline {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-0);
  }

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

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

  .btn[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
  }

  /* Header */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(10, 14, 20, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-0);
    transition: background .3s ease, box-shadow .3s ease;
  }

  .site-header.scrolled {
    background: rgba(10, 14, 20, 0.96);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  }

  .header-inner {
    display: flex;
    align-items: center;
    height: 72px;
    gap: 24px;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-0);
    font-size: 18px;
    font-weight: 700;
    white-space: nowrap;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
    flex-shrink: 0;
  }

  .brand-sub {
    color: var(--primary);
  }

  .site-nav {
    display: flex;
    gap: 28px;
    align-items: center;
    margin-left: auto;
  }

  .nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-1);
    padding: 8px 2px;
    position: relative;
    transition: color .2s ease;
  }

  .nav-link:hover {
    color: var(--text-0);
  }

  .nav-link.active {
    color: var(--text-0);
  }

  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 3px;
    border-radius: 3px;
    background: var(--primary);
    box-shadow: 0 8px 20px -6px var(--primary-glow);
  }

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

  .nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--border-1);
    border-radius: 6px;
    color: var(--text-0);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color .2s, color .2s;
  }

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

  /* Category Hero */
  .category-hero {
    position: relative;
    padding: 160px 0 88px;
    background: linear-gradient(90deg, rgba(10, 14, 20, 0.4) 0%, rgba(10, 14, 20, 0.88) 100%), url('/assets/images/backpic/back-3.png') center / cover no-repeat;
    border-bottom: 1px solid var(--border-0);
  }

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-2);
    margin-bottom: 20px;
  }

  .breadcrumb a {
    transition: color .2s;
  }

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

  .breadcrumb .current {
    color: var(--text-0);
  }

  .hero-title {
    font-size: 56px;
    font-weight: 900;
    color: var(--text-0);
    line-height: 1.1;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
  }

  .hero-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-1);
    max-width: 640px;
    margin-bottom: 32px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 48px;
  }

  .hero-metrics {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 32px;
  }

  .metric-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .metric-num {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-0);
    font-variant-numeric: tabular-nums;
  }

  .metric-label {
    font-size: 12px;
    color: var(--text-2);
    letter-spacing: 0.03em;
  }

  .metric-divider {
    width: 1px;
    height: 36px;
    background: var(--border-1);
  }

  @media (max-width: 640px) {
    .hero-metrics {
      gap: 16px;
    }

    .metric-divider {
      height: 28px;
    }
  }

  /* Sections */
  .section {
    padding: 100px 0;
  }

  .section-alt {
    background: var(--bg-1);
    border-top: 1px solid var(--border-0);
    border-bottom: 1px solid var(--border-0);
  }

  .section-head {
    margin-bottom: 56px;
  }

  .section-tag {
    display: inline-block;
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
  }

  .section-title {
    font-size: 38px;
    font-weight: 800;
    color: var(--text-0);
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin-bottom: 12px;
  }

  .section-desc {
    color: var(--text-1);
    font-size: 15px;
    max-width: 560px;
    line-height: 1.8;
  }

  @media (max-width: 768px) {
    .section {
      padding: 72px 0;
    }

    .section-title {
      font-size: 30px;
    }
  }

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

  .feature-card {
    grid-column: span 4;
    background: var(--bg-2);
    border: 1px solid var(--border-0);
    border-radius: 10px;
    padding: 28px;
    position: relative;
    overflow: hidden;
    transition: background .3s ease, border-color .3s ease, transform .3s ease, box-shadow .3s ease;
  }

  .feature-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    opacity: 0;
    transition: opacity .3s ease;
  }

  .feature-card:hover {
    background: var(--bg-3);
    border-color: var(--border-1);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  }

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

  .feature-card.card-gold {
    border-color: rgba(224, 184, 123, 0.45);
  }

  .feature-card.card-gold::before {
    background: var(--secondary);
  }

  .feature-card.card-gold:hover {
    border-color: var(--primary);
  }

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

  .feature-icon {
    width: 40px;
    height: 40px;
    color: var(--primary);
    margin-bottom: 20px;
  }

  .card-gold .feature-icon {
    color: var(--secondary);
  }

  .feature-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 10px;
    line-height: 1.4;
  }

  .feature-desc {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-1);
  }

  .feature-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    margin-top: 16px;
    transition: gap .2s ease, color .2s ease;
  }

  .feature-link svg {
    width: 14px;
    height: 14px;
    transition: transform .2s ease;
  }

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

  .feature-card:hover .feature-link svg {
    transform: translateX(2px);
  }

  .card-gold .feature-link {
    color: var(--secondary);
  }

  @media (max-width: 1024px) {
    .feature-card {
      grid-column: span 6;
    }
  }

  @media (max-width: 768px) {
    .feature-card {
      grid-column: span 12;
    }
  }

  /* Scenario */
  .scenario-wrap {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 56px;
    align-items: center;
  }

  .scenario-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 36px;
  }

  .scenario-card {
    background: var(--bg-2);
    border: 1px solid var(--border-0);
    border-radius: 10px;
    padding: 24px;
    transition: background .3s, border-color .3s, transform .3s;
  }

  .scenario-card:hover {
    background: var(--bg-3);
    border-color: var(--border-1);
    transform: translateY(-3px);
  }

  .scenario-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
    margin-bottom: 14px;
  }

  .scenario-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 8px;
  }

  .scenario-card p {
    font-size: 13px;
    color: var(--text-1);
    line-height: 1.75;
  }

  .scenario-image {
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4);
  }

  .scenario-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 360px;
  }

  .scenario-image::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(10, 14, 20, 0.6) 100%);
    pointer-events: none;
  }

  .scenario-badge {
    position: absolute;
    left: 20px;
    bottom: 20px;
    z-index: 2;
    background: rgba(10, 14, 20, 0.75);
    border: 1px solid var(--border-1);
    border-radius: 999px;
    padding: 7px 16px;
    font-size: 12px;
    color: var(--text-0);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
  }

  @media (max-width: 900px) {
    .scenario-wrap {
      grid-template-columns: 1fr;
      gap: 40px;
    }

    .scenario-image img {
      min-height: 260px;
    }
  }

  @media (max-width: 600px) {
    .scenario-list {
      grid-template-columns: 1fr;
    }
  }

  /* Stats */
  .stats-section {
    background: var(--bg-1);
    border-top: 1px solid var(--border-0);
    border-bottom: 1px solid var(--border-0);
  }

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

  .stat-item {
    text-align: center;
    padding: 24px 16px;
    border: 1px solid var(--border-0);
    border-radius: 10px;
    background: var(--bg-2);
    transition: border-color .3s;
  }

  .stat-item:hover {
    border-color: var(--border-1);
  }

  .stat-label {
    font-size: 13px;
    color: var(--text-2);
    margin-bottom: 12px;
    letter-spacing: 0.02em;
  }

  .stat-num {
    font-size: 64px;
    font-weight: 800;
    color: var(--text-0);
    line-height: 1;
    font-variant-numeric: tabular-nums;
    font-family: 'DIN Alternate', 'Barlow Condensed', 'PingFang SC', sans-serif;
  }

  .stat-unit {
    font-size: 20px;
    color: var(--text-1);
    font-weight: 600;
    margin-left: 2px;
  }

  .stat-bar {
    width: 48px;
    height: 2px;
    background: linear-gradient(90deg, var(--secondary), var(--primary));
    margin: 16px auto 0;
  }

  @media (max-width: 1024px) {
    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (max-width: 520px) {
    .stats-grid {
      grid-template-columns: 1fr;
    }

    .stat-num {
      font-size: 48px;
    }
  }

  /* Process */
  .process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    counter-reset: step;
  }

  .process-step {
    position: relative;
    background: var(--bg-2);
    border: 1px solid var(--border-0);
    border-radius: 10px;
    padding: 32px 24px 28px;
    transition: border-color .3s, transform .3s;
  }

  .process-step:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
  }

  .process-num {
    font-size: 42px;
    font-weight: 800;
    color: var(--bg-3);
    -webkit-text-stroke: 1px var(--primary);
    line-height: 1;
    margin-bottom: 16px;
    font-variant-numeric: tabular-nums;
  }

  .process-step h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 8px;
  }

  .process-step p {
    font-size: 13px;
    color: var(--text-1);
    line-height: 1.75;
  }

  .process-arrow {
    position: absolute;
    right: -14px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    color: var(--primary);
    width: 20px;
    height: 20px;
    pointer-events: none;
  }

  .process-arrow.last {
    display: none;
  }

  @media (max-width: 900px) {
    .process-grid {
      grid-template-columns: repeat(2, 1fr);
      row-gap: 20px;
    }
  }

  @media (max-width: 520px) {
    .process-grid {
      grid-template-columns: 1fr;
    }
  }

  /* FAQ */
  .faq-wrap {
    display: grid;
    grid-template-columns: 26% 1fr;
    gap: 56px;
    align-items: start;
  }

  .faq-intro .section-title {
    font-size: 32px;
  }

  .faq-intro p {
    margin: 16px 0 24px;
    font-size: 14px;
    color: var(--text-1);
    line-height: 1.8;
  }

  .faq-list {
    border-top: 1px solid var(--border-0);
  }

  .faq-item {
    border-bottom: 1px solid var(--border-0);
  }

  .faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 22px 0;
    background: none;
    border: none;
    color: var(--text-0);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    transition: color .2s;
  }

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

  .faq-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--text-2);
    transition: transform .3s ease, color .3s ease;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
    color: var(--primary);
  }

  .faq-item.open .faq-question {
    color: var(--primary);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
  }

  .faq-answer-inner {
    padding: 0 32px 20px 0;
    font-size: 14px;
    line-height: 1.85;
    color: var(--text-1);
  }

  @media (max-width: 900px) {
    .faq-wrap {
      grid-template-columns: 1fr;
      gap: 40px;
    }
  }

  /* CTA / Contact */
  .section-cta {
    position: relative;
    padding: 100px 0;
    background: linear-gradient(180deg, rgba(10, 14, 20, 0.7), rgba(10, 14, 20, 0.92)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
    border-top: 1px solid var(--border-0);
  }

  .cta-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-0);
    border-radius: 16px;
    padding: 56px;
  }

  .cta-info .section-title {
    font-size: 32px;
    margin-bottom: 16px;
  }

  .cta-info p {
    color: var(--text-1);
    font-size: 14px;
    line-height: 1.85;
    margin-bottom: 28px;
  }

  .cta-contact-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .cta-contact-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-1);
  }

  .cta-contact-list svg {
    width: 18px;
    height: 18px;
    color: var(--primary);
    flex-shrink: 0;
  }

  .form-group {
    margin-bottom: 20px;
  }

  .form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-1);
    margin-bottom: 8px;
    letter-spacing: 0.02em;
  }

  .form-control {
    width: 100%;
    height: 44px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-0);
    border-radius: 6px;
    padding: 0 14px;
    color: var(--text-0);
    font-size: 14px;
    font-family: inherit;
    transition: border-color .2s, box-shadow .2s;
  }

  textarea.form-control {
    height: 120px;
    padding: 12px 14px;
    resize: vertical;
  }

  .form-control::placeholder {
    color: var(--text-2);
  }

  .form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(31, 210, 134, 0.1);
    outline: none;
  }

  .form-control.invalid {
    border-color: var(--danger);
  }

  select.form-control {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='none' stroke='%2366727F' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2 5l5 5 5-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    cursor: pointer;
  }

  select.form-control option {
    background: var(--bg-1);
    color: var(--text-0);
  }

  .form-error {
    display: none;
    color: var(--danger);
    font-size: 12px;
    margin-top: 6px;
  }

  .form-error.show {
    display: block;
  }

  .btn-submit {
    width: 100%;
    height: 48px;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.04em;
  }

  .btn-submit.success {
    background: var(--primary);
    color: #0A0E14;
  }

  .form-note {
    margin-top: 14px;
    font-size: 12px;
    color: var(--text-2);
    text-align: center;
  }

  @media (max-width: 900px) {
    .cta-wrap {
      grid-template-columns: 1fr;
      padding: 32px 24px;
    }
  }

  /* Footer */
  .site-footer {
    background: #070A0E;
    border-top: 1px solid var(--border-0);
    padding: 64px 0 24px;
  }

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

  .footer-brand .brand-text {
    color: var(--text-0);
  }

  .footer-brand p {
    font-size: 14px;
    color: var(--text-2);
    margin-top: 16px;
    max-width: 320px;
    line-height: 1.8;
  }

  .footer-col h4 {
    font-size: 15px;
    color: var(--text-0);
    margin-bottom: 16px;
    font-weight: 600;
  }

  .footer-col ul {
    list-style: none;
  }

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

  .footer-col a {
    font-size: 14px;
    color: var(--text-2);
    transition: color .2s;
  }

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

  .footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    border-top: 1px solid var(--border-0);
    padding-top: 20px;
    font-size: 12px;
    color: var(--text-2);
  }

  @media (max-width: 900px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
      grid-column: span 2;
    }
  }

  @media (max-width: 520px) {
    .footer-grid {
      grid-template-columns: 1fr;
    }

    .footer-brand {
      grid-column: span 1;
    }

    .footer-bottom {
      flex-direction: column;
      gap: 8px;
    }
  }

  /* Reveal animation */
  .reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity .6s ease, transform .6s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: none;
  }

  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      transition: none !important;
      animation: none !important;
    }

    .reveal {
      opacity: 1;
      transform: none;
    }
  }

  /* Mobile Nav */
  @media (max-width: 860px) {
    .site-nav {
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      background: var(--bg-0);
      flex-direction: column;
      align-items: stretch;
      padding: 16px 24px 24px;
      gap: 4px;
      display: none;
      border-bottom: 1px solid var(--border-0);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }

    .site-nav.open {
      display: flex;
    }

    .nav-link {
      font-size: 15px;
      padding: 13px 10px;
      border-bottom: 1px solid var(--border-0);
    }

    .nav-link.active::after {
      display: none;
    }

    .nav-link.active {
      color: var(--primary);
      border-left: 3px solid var(--primary);
    }

    .nav-toggle {
      display: inline-flex;
    }

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