/* roulang page: index */
:root {
  --brand: #C6F24E;
  --accent: #00E0A8;
  --gradient: linear-gradient(135deg, #C6F24E 0%, #00E0A8 100%);
  --ink: #0D1B2A;
  --paper: #F7F9F4;
  --card: #FFFFFF;
  --text-main: #1C2B36;
  --text-sub: #5E6E7B;
  --text-faint: #8A9AA6;
  --line: #E4EBE6;
  --green-deep: #1E7A5A;
  --green-dark: #2D6A4F;
  --green-light: #EAF7C8;
  --green-soft: #E0F5EC;
  --radius-lg: 24px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow: 0 8px 30px rgba(13, 27, 42, 0.08);
  --shadow-hover: 0 12px 40px rgba(13, 27, 42, 0.14);
  --font: "Noto Sans SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Inter", "DIN Alternate", "Roboto Mono", monospace;
  --container: 1200px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color .2s ease;
}
ul, ol {
  list-style: none;
}
button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  outline: none;
}
button {
  cursor: pointer;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--green-light);
  color: var(--green-dark);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}
.badge-green {
  background: var(--green-light);
  color: var(--green-dark);
}
.badge-soft {
  background: var(--green-soft);
  color: var(--green-dark);
}
.tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--green-light);
  color: var(--green-dark);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
}
.tag-sm {
  padding: 2px 10px;
  font-size: 12px;
}
.tag-light {
  display: inline-block;
  padding: 4px 12px;
  background: var(--green-soft);
  color: var(--green-dark);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  transition: all .2s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  border: none;
  box-shadow: 0 4px 16px rgba(0, 224, 168, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 224, 168, 0.4);
}
.btn-primary:active {
  transform: scale(0.97);
}
.btn-secondary {
  background: #fff;
  color: var(--text-main);
  border-color: var(--line);
}
.btn-secondary:hover {
  border-color: var(--brand);
  color: var(--green-deep);
  box-shadow: 0 4px 16px rgba(198, 242, 78, 0.25);
}
.btn-secondary:active {
  transform: scale(0.97);
}
.btn-sm {
  padding: 8px 20px;
  font-size: 14px;
}
.btn-download {
  background: #fff;
  color: var(--ink);
  border: 1px solid rgba(255,255,255,0.2);
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  min-width: 150px;
}
.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.18);
  color: var(--green-deep);
}
.btn-download:active {
  transform: scale(0.97);
}
.btn:focus-visible,
.search-box input:focus-visible,
.input:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}
.btn-block {
  width: 100%;
}
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.7;
}
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--green-deep);
  font-size: 14px;
  font-weight: 600;
}
.link-more:hover {
  text-decoration: underline;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  background: rgba(247, 249, 244, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--gradient);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.3px;
}
.logo-light .logo-text {
  color: #fff;
}
.logo-light .logo-icon {
  background: var(--gradient);
  color: var(--ink);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
}
.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  transition: all .2s ease;
}
.nav-link:hover {
  color: var(--green-deep);
  background: var(--green-light);
}
.nav-link.active {
  color: var(--green-dark);
  background: var(--green-light);
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}
.search-box {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  width: 180px;
  height: 38px;
  padding: 0 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: all .2s ease;
}
.search-box:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(198, 242, 78, 0.25);
  width: 220px;
}
.search-box i {
  color: var(--text-faint);
  font-size: 14px;
}
.search-box input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 13px;
  color: var(--text-main);
  min-width: 0;
}
.search-box input::placeholder {
  color: var(--text-faint);
}
.search-box kbd {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 11px;
  color: var(--text-faint);
  font-family: var(--font-num);
  white-space: nowrap;
}
.search-dropdown {
  position: absolute;
  top: 42px;
  right: 0;
  width: 320px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all .2s ease;
  z-index: 50;
}
.search-box:focus-within .search-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.search-dropdown .sd-label {
  font-size: 12px;
  color: var(--text-faint);
  font-weight: 600;
  margin-bottom: 8px;
}
.search-dropdown .sd-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.search-dropdown .sd-tags a {
  display: inline-block;
  padding: 6px 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-sub);
  transition: all .2s ease;
}
.search-dropdown .sd-tags a:hover {
  background: var(--green-light);
  border-color: var(--brand);
  color: var(--green-dark);
}
.login-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  padding: 6px 10px;
}
.login-link:hover {
  color: var(--green-deep);
}
.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text-main);
  font-size: 16px;
}
.mobile-search-mask {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(13, 27, 42, 0.5);
  backdrop-filter: blur(4px);
  align-items: flex-start;
  justify-content: center;
  padding: 80px 20px 20px;
}
.mobile-search-mask.open {
  display: flex;
}
.mobile-search-panel {
  width: 100%;
  max-width: 480px;
  background: #fff;
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--shadow-hover);
}
.mobile-search-panel .ms-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  margin-bottom: 16px;
}
.mobile-search-panel .ms-input-wrap:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(198, 242, 78, 0.25);
}
.mobile-search-panel input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
}
.mobile-search-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 80px 0 90px;
  background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat, var(--paper);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, rgba(198, 242, 78, 0.28) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.5;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(247,249,244,0.92) 0%, rgba(247,249,244,0.75) 45%, rgba(247,249,244,0.35) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}
.hero-copy {
  max-width: 600px;
}
.hero-copy .badge {
  margin-bottom: 24px;
}
.hero-copy h1 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 16px;
}
.hero-copy .lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-sub);
  margin-bottom: 32px;
  max-width: 460px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.stat-num {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  display: block;
  line-height: 1.2;
}
.stat-label {
  font-size: 13px;
  color: var(--text-faint);
  margin-top: 4px;
  display: block;
}
.hero-visual {
  position: relative;
}
.hero-img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
}
.float-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: rgba(255,255,255,0.94);
  border-radius: 999px;
  box-shadow: var(--shadow);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  backdrop-filter: blur(8px);
  animation: floatY 3s ease-in-out infinite alternate;
}
.float-badge i {
  color: var(--green-deep);
}
.float-badge-1 {
  top: 24px;
  left: -20px;
}
.float-badge-2 {
  bottom: 36px;
  right: -12px;
  animation-delay: 1.2s;
}
@keyframes floatY {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}

/* ===== Features Carousel ===== */
.features {
  padding: 90px 0;
}
.feature-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 8px 4px 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.feature-track::-webkit-scrollbar {
  height: 6px;
}
.feature-track::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 999px;
}
.feature-card {
  flex: 0 0 340px;
  scroll-snap-align: start;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all .3s ease;
  border-top: 4px solid transparent;
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-top-color: var(--brand);
}
.feature-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform .3s ease;
}
.feature-card:hover img {
  transform: scale(1.03);
}
.feature-body {
  padding: 24px;
}
.feature-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.feature-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-sub);
  margin-bottom: 16px;
}

/* ===== System Requirements ===== */
.sysreq {
  padding: 90px 0;
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.sysreq .section-head {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.sysreq .section-head .link-more {
  margin-top: 8px;
}
.sysreq-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.sysreq-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: all .25s ease;
}
.sysreq-item:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.sys-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--gradient);
  color: var(--ink);
  font-size: 20px;
  margin: 0 auto 16px;
}
.sysreq-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.sysreq-item p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ===== Testimonials ===== */
.testimonials {
  padding: 90px 0;
}
.testimonial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 920px;
  margin: 0 auto;
}
.testimonial-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: all .3s ease;
  border-top: 4px solid transparent;
}
.testimonial-card:hover {
  border-top-color: var(--brand);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.testimonial-user img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}
.testimonial-user strong {
  font-size: 15px;
  font-weight: 700;
  display: block;
  line-height: 1.3;
}
.testimonial-user span {
  font-size: 12px;
  color: var(--text-faint);
}
.testimonial-stars {
  font-size: 14px;
  line-height: 1;
  margin-bottom: 12px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
}
.testimonial-card > p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 16px;
}

/* ===== News / CMS ===== */
.news {
  padding: 90px 0;
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.news .section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 32px;
  text-align: left;
  max-width: none;
}
.news .section-head h2 {
  margin-bottom: 4px;
}
.news-featured {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 28px;
  background: var(--paper);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 28px;
  border-left: 4px solid var(--brand);
  box-shadow: var(--shadow);
  transition: box-shadow .3s ease;
}
.news-featured:hover {
  box-shadow: var(--shadow-hover);
}
.news-featured img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 16px;
}
.news-featured-body .tag {
  margin-bottom: 10px;
}
.news-featured-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 8px 0 10px;
  line-height: 1.4;
}
.news-featured-body h3 a {
  color: var(--text-main);
}
.news-featured-body h3 a:hover {
  color: var(--green-deep);
}
.news-featured-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.meta-line {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-faint);
}
.meta-line i {
  margin-right: 4px;
}
.news-list li {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 16px;
  border-radius: 14px;
  transition: background .2s ease;
}
.news-list li:hover {
  background: var(--green-light);
}
.news-date {
  flex: 0 0 100px;
  font-size: 13px;
  color: var(--text-faint);
  font-family: var(--font-num);
}
.news-title {
  flex: 1;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.news-title:hover {
  color: var(--green-deep);
}
.news-list .tag {
  flex-shrink: 0;
}
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
  text-align: center;
  background: var(--paper);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--line);
}
.empty-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--green-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--green-dark);
  margin-bottom: 16px;
}
.empty-state p {
  font-size: 15px;
  color: var(--text-sub);
}

/* ===== FAQ ===== */
.faq-section {
  padding: 90px 0;
}
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all .25s ease;
}
.faq-item:hover {
  border-color: var(--brand);
}
.faq-item.open {
  box-shadow: var(--shadow);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: background .2s ease;
}
.faq-question:hover {
  background: var(--paper);
}
.faq-question i {
  flex-shrink: 0;
  color: var(--text-faint);
  transition: transform .3s ease;
}
.faq-item.open .faq-question i {
  transform: rotate(180deg);
  color: var(--green-deep);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-answer-inner {
  padding: 0 22px 18px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
}

/* ===== Download CTA ===== */
.download-cta {
  padding: 90px 0;
  background: var(--ink);
}
.cta-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  background: linear-gradient(135deg, rgba(198,242,78,0.08) 0%, rgba(0,224,168,0.06) 100%);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 32px;
  padding: 56px;
}
.cta-card h2 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.3px;
  margin-bottom: 12px;
}
.cta-card p {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 28px;
  line-height: 1.7;
}
.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 16px;
}
.version-info {
  font-size: 13px;
  color: rgba(255,255,255,0.45) !important;
  font-family: var(--font-num);
  margin-bottom: 0 !important;
  letter-spacing: 0.5px;
}
.qr-wrap {
  text-align: center;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}
.qr-wrap img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 12px;
  margin: 0 auto 10px;
}
.qr-wrap p {
  font-size: 13px;
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 0;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,0.65);
  padding: 64px 0 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 2.6fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 260px;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 10px;
  transition: color .2s ease;
}
.footer-col a:hover {
  color: var(--brand);
}
.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}

/* ===== Responsive ===== */
@media (max-width: 1080px) {
  .search-box {
    width: 140px;
  }
  .search-box:focus-within {
    width: 180px;
  }
}
@media (max-width: 991px) {
  .container {
    padding: 0 20px;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 12px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    box-shadow: var(--shadow);
  }
  .main-nav.open {
    display: flex;
  }
  .nav-link {
    width: 100%;
    padding: 12px 16px;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .search-box {
    width: 38px;
    padding: 0;
    justify-content: center;
    border-color: transparent;
    background: transparent;
  }
  .search-box:focus-within {
    width: 38px;
  }
  .search-box input,
  .search-box kbd {
    display: none;
  }
  .search-box i {
    font-size: 16px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-copy {
    max-width: none;
  }
  .hero {
    padding: 64px 0;
  }
  .hero-copy h1 {
    font-size: 30px;
  }
  .hero-visual {
    order: 2;
  }
  .float-badge-1 {
    left: 8px;
  }
  .float-badge-2 {
    right: 8px;
  }
  .sysreq-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .news-featured {
    grid-template-columns: 1fr;
  }
  .news-featured img {
    height: 200px;
  }
  .cta-card {
    grid-template-columns: 1fr;
    padding: 40px 32px;
  }
  .qr-wrap {
    max-width: 220px;
    margin: 0 auto;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-cols {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 767px) {
  .nav-wrap {
    gap: 12px;
  }
  .login-link {
    display: none;
  }
  .nav-right .btn-primary {
    display: none;
  }
  .hero {
    padding: 48px 0 56px;
  }
  .hero-copy h1 {
    font-size: 24px;
  }
  .hero-copy .badge {
    font-size: 12px;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-stats {
    gap: 24px;
  }
  .stat-num {
    font-size: 22px;
  }
  .feature-track {
    gap: 16px;
  }
  .feature-card {
    flex: 0 0 85%;
  }
  .section-head h2 {
    font-size: 22px;
  }
  .sysreq {
    padding: 56px 0;
  }
  .sysreq-grid {
    grid-template-columns: 1fr 1fr;
  }
  .sysreq-item {
    padding: 20px 16px;
  }
  .sysreq-item h3 {
    font-size: 16px;
  }
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  .news {
    padding: 56px 0;
  }
  .news-list li {
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 8px;
  }
  .news-date {
    flex: 0 0 100%;
  }
  .news-title {
    flex: 1 0 100%;
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .cta-card {
    padding: 32px 20px;
    border-radius: 24px;
  }
  .download-buttons {
    flex-direction: column;
  }
  .btn-download {
    width: 100%;
  }
  .download-cta {
    padding: 56px 0;
  }
  .footer-top {
    padding-bottom: 32px;
  }
  .footer-cols {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .site-footer {
    padding-top: 48px;
  }
}
@media (max-width: 520px) {
  .sysreq-grid {
    grid-template-columns: 1fr;
  }
  .footer-cols {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    justify-content: space-between;
    width: 100%;
  }
  .section-head {
    margin-bottom: 32px;
  }
  .section-head h2 {
    font-size: 20px;
  }
}

/* roulang page: category1 */
:root {
  --brand: #C6F24E;
  --accent: #00E0A8;
  --gradient: linear-gradient(135deg, #C6F24E 0%, #00E0A8 100%);
  --ink: #0D1B2A;
  --paper: #F7F9F4;
  --card: #FFFFFF;
  --text-main: #1C2B36;
  --text-sub: #5E6E7B;
  --text-faint: #8A9AA6;
  --line: #E4EBE6;
  --success: #1E7A5A;
  --font: "Noto Sans SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Inter", "DIN Alternate", "Roboto Mono", monospace;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow: 0 8px 30px rgba(13, 27, 42, 0.08);
  --shadow-hover: 0 12px 40px rgba(13, 27, 42, 0.14);
  --container: 1200px;
  --space: 80px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--paper);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

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

a:hover {
  color: #115740;
  text-decoration: underline;
}

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

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

section {
  padding: var(--space) 0;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
  margin-bottom: 12px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-sub);
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 249, 244, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo:hover {
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
}

.logo-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.2px;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
  overflow-x: auto;
  scrollbar-width: none;
}

.main-nav::-webkit-scrollbar {
  display: none;
}

.nav-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  border-radius: var(--radius-pill);
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-main);
  background: rgba(198, 242, 78, 0.2);
  text-decoration: none;
}

.nav-link.active {
  color: var(--text-main);
  background: rgba(198, 242, 78, 0.35);
}

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

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box input {
  width: 180px;
  height: 36px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: var(--card);
  padding: 0 14px 0 34px;
  font-size: 13px;
  color: var(--text-main);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(198, 242, 78, 0.3);
}

.search-box .search-icon {
  position: absolute;
  left: 12px;
  font-size: 14px;
  color: var(--text-faint);
}

.search-box kbd {
  position: absolute;
  right: 10px;
  font-family: var(--font-num);
  font-size: 11px;
  color: var(--text-faint);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 4px;
  pointer-events: none;
}

.header-login {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  padding: 6px 4px;
  transition: color 0.2s;
}

.header-login:hover {
  color: var(--success);
  text-decoration: none;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--gradient);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  padding: 9px 20px;
  border-radius: var(--radius-pill);
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(0, 224, 168, 0.25);
}

.btn-download:hover {
  transform: translateY(-2px);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 6px 20px rgba(0, 224, 168, 0.35);
}

.btn-download:active {
  transform: scale(0.97);
}

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

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-main);
  cursor: pointer;
  background: transparent;
}

.menu-toggle:hover {
  background: rgba(198, 242, 78, 0.2);
}

/* ===== Hero ===== */
.category-hero {
  background: linear-gradient(180deg, #EDF5E4 0%, var(--paper) 100%);
  padding: 68px 0 72px;
  border-bottom: 1px solid var(--line);
}

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

.category-hero h1 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 18px;
}

.category-hero h1 span {
  background: linear-gradient(135deg, #1E7A5A 0%, #00A67E 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.category-hero p {
  font-size: 16px;
  color: var(--text-sub);
  margin-bottom: 28px;
  max-width: 500px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(198, 242, 78, 0.3);
  border: 1px solid rgba(198, 242, 78, 0.6);
  color: #2D6A4F;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}

.hero-badge i {
  color: var(--success);
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient);
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  padding: 13px 28px;
  border-radius: var(--radius-pill);
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(0, 224, 168, 0.25);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0, 224, 168, 0.35);
}

.btn-primary:active {
  transform: scale(0.97);
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  padding: 13px 28px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  transition: border-color 0.2s, color 0.2s, transform 0.2s;
  cursor: pointer;
}

.btn-secondary:hover {
  border-color: var(--brand);
  color: var(--success);
  text-decoration: none;
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: scale(0.97);
}

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

.hero-visual {
  position: relative;
}

.hero-visual .main-image {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  object-fit: cover;
  aspect-ratio: 4/3;
}

.hero-float-card {
  position: absolute;
  background: var(--card);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-sub);
}

.hero-float-card .float-num {
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  color: var(--success);
}

.hero-float-card.top-right {
  top: 18px;
  right: -10px;
}

.hero-float-card.bottom-left {
  bottom: 18px;
  left: -12px;
}

/* ===== Alternating Feature Blocks ===== */
.feature-alternate {
  padding: var(--space) 0;
}

.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 72px;
}

.feature-block:last-child {
  margin-bottom: 0;
}

.feature-block.reverse .feature-image {
  order: 2;
}

.feature-block.reverse .feature-content {
  order: 1;
}

.feature-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.feature-image img {
  width: 100%;
  aspect-ratio: 16/11;
  object-fit: cover;
  border-radius: var(--radius-lg);
  transition: transform 0.3s ease;
}

.feature-image:hover img {
  transform: scale(1.02);
}

.feature-image .img-tag {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(13, 27, 42, 0.75);
  backdrop-filter: blur(4px);
  color: var(--brand);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.3px;
}

.feature-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.feature-content h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.feature-content p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 16px;
}

.feature-points {
  list-style: none;
  margin: 18px 0 0;
}

.feature-points li {
  position: relative;
  padding-left: 28px;
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 10px;
}

.feature-points li::before {
  content: "\f00c";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 13px;
  color: var(--success);
  position: absolute;
  left: 0;
  top: 2px;
  background: rgba(0, 224, 168, 0.15);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.data-badge {
  display: inline-block;
  margin-top: 8px;
  padding: 6px 16px;
  background: #EAF7C8;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: #2D6A4F;
}

.data-badge strong {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  margin-right: 4px;
}

/* ===== Quick Digital ===== */
.quick-digital {
  background: var(--card);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.quick-card {
  text-align: center;
  padding: 36px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.quick-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.quick-icon {
  font-size: 28px;
  color: var(--success);
  margin-bottom: 12px;
  background: #EAF7C8;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  margin-right: auto;
}

.quick-card .quick-num {
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}

.quick-card .quick-label {
  font-size: 14px;
  color: var(--text-sub);
  margin-top: 6px;
}

/* ===== Use Cases ===== */
.use-cases {
  background: var(--paper);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.case-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  border-top: 4px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
  position: relative;
}

.case-card:hover {
  border-top-color: var(--brand);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.case-card .case-icon {
  font-size: 22px;
  color: var(--success);
  margin-bottom: 16px;
  background: #EAF7C8;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

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

/* ===== Bottom CTA ===== */
.bottom-cta {
  padding: 48px 0 var(--space);
}

.cta-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.cta-card {
  background: var(--ink);
  border-radius: var(--radius-lg);
  padding: 40px;
  color: #F0F5F0;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(198, 242, 78, 0.25);
  transition: box-shadow 0.3s, transform 0.3s;
}

.cta-card:hover {
  box-shadow: 0 12px 40px rgba(13, 27, 42, 0.35);
  transform: translateY(-3px);
}

.cta-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--brand);
}

.cta-card p {
  font-size: 14px;
  line-height: 1.7;
  color: #B8C4CC;
  margin-bottom: 22px;
}

.cta-card .btn-primary {
  background: var(--gradient);
  color: var(--ink);
  padding: 11px 22px;
  font-size: 14px;
}

/* ===== FAQ teaser ===== */
.faq-teaser {
  background: var(--card);
  border-top: 1px solid var(--line);
}

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

.faq-item-card {
  background: var(--paper);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--line);
  transition: border-color 0.2s, background 0.2s;
}

.faq-item-card:hover {
  border-color: var(--brand);
  background: #FDFEF9;
}

.faq-item-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.faq-item-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

.faq-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 28px;
  font-size: 14px;
  font-weight: 600;
  color: var(--success);
  background: rgba(198, 242, 78, 0.2);
  padding: 9px 22px;
  border-radius: var(--radius-pill);
  transition: background 0.2s, color 0.2s;
}

.faq-more:hover {
  background: rgba(198, 242, 78, 0.4);
  color: #115740;
  text-decoration: none;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--ink);
  color: #A9B2BC;
  padding: 64px 0 0;
  margin-top: var(--space);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 2.6fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 340px;
  color: #A9B2BC;
}

.logo-light .logo-icon {
  background: var(--gradient);
  color: var(--ink);
}

.logo-light .logo-text {
  color: #F0F5F0;
}

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

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #F0F5F0;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 13px;
  color: #A9B2BC;
  padding: 4px 0;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--brand);
  text-decoration: none;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: #7C8792;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .header-inner {
    gap: 12px;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--paper);
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 24px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 24px rgba(13, 27, 42, 0.08);
    display: none;
    z-index: 99;
    overflow-y: auto;
    max-height: calc(100vh - 64px);
  }

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

  .main-nav .nav-link {
    width: 100%;
    padding: 10px 12px;
    border-radius: 8px;
  }

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

  .search-box {
    display: none;
  }

  .header-login {
    display: none;
  }

  .category-hero .container {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

  .feature-block.reverse .feature-image {
    order: 1;
  }

  .feature-block.reverse .feature-content {
    order: 2;
  }

  .feature-image img {
    aspect-ratio: 16/10;
  }

  .quick-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

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

  .cta-cards {
    grid-template-columns: 1fr;
  }

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

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

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

@media (max-width: 767px) {
  :root {
    --space: 48px;
  }

  .container {
    padding: 0 16px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .logo-text {
    font-size: 15px;
  }

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

  .category-hero {
    padding: 48px 0 52px;
  }

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

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

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

  .hero-float-card {
    padding: 8px 12px;
    font-size: 12px;
  }

  .hero-float-card .float-num {
    font-size: 16px;
  }

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

  .feature-content h2 {
    font-size: 22px;
  }

  .feature-content h3 {
    font-size: 17px;
  }

  .feature-points li {
    font-size: 14px;
  }

  .quick-num {
    font-size: 26px;
  }

  .case-card {
    padding: 24px;
  }

  .cta-card {
    padding: 28px;
  }

  .faq-item-card {
    padding: 20px;
  }

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

  .footer-bottom p {
    font-size: 12px;
    line-height: 1.6;
  }
}

@media (max-width: 480px) {
  .quick-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

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

/* roulang page: category2 */
:root{
    --brand:#C6F24E;
    --accent:#00E0A8;
    --gradient:linear-gradient(135deg, #C6F24E 0%, #00E0A8 100%);
    --ink:#0D1B2A;
    --paper:#F7F9F4;
    --card:#FFFFFF;
    --text-main:#1C2B36;
    --text-sub:#5E6E7B;
    --text-faint:#8A9AA6;
    --line:#E4EBE6;
    --link:#1E7A5A;
    --success-green:#2D6A4F;
    --chip-bg:#EAF7C8;
    --chip-blue:#E0F5EC;
    --font:"Noto Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    --font-num:"Inter","DIN Alternate","Roboto Mono",monospace;
    --radius-lg:24px;
    --radius-md:14px;
    --radius-pill:999px;
    --radius-sm:8px;
    --shadow:0 8px 30px rgba(13,27,42,0.08);
    --shadow-hover:0 12px 40px rgba(13,27,42,0.14);
    --container:1200px;
    --space-section:80px;
    --space-mobile:40px;
  }

  *,*::before,*::after{
    box-sizing:border-box;
    margin:0;
    padding:0;
  }
  html{
    scroll-behavior:smooth;
  }
  body{
    font-family:var(--font);
    background-color:var(--paper);
    color:var(--text-main);
    line-height:1.75;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
  }
  h1,h2,h3,h4{
    line-height:1.3;
    color:var(--ink);
    font-weight:700;
  }
  h1{font-size:36px;letter-spacing:-0.3px;}
  h2{font-size:28px;letter-spacing:-0.2px;}
  h3{font-size:20px;font-weight:600;}
  p{
    color:var(--text-sub);
  }
  a{
    color:var(--link);
    text-decoration:none;
    transition:color 0.2s ease;
  }
  a:hover{
    color:var(--success-green);
    text-decoration:underline;
  }
  img{
    max-width:100%;
    display:block;
    border-radius:16px;
  }
  button,input,textarea,select{
    font-family:inherit;
    font-size:inherit;
    line-height:inherit;
    border:none;
    outline:none;
    background:none;
  }
  ul,ol{
    padding-left:1.2rem;
  }
  .container{
    max-width:var(--container);
    margin:0 auto;
    padding:0 24px;
  }
  .section{
    padding:var(--space-section) 0;
  }
  .section-sm{
    padding:48px 0;
  }
  .text-center{
    text-align:center;
  }
  .section-title{
    font-size:28px;
    margin-bottom:12px;
  }
  .section-sub{
    font-size:16px;
    color:var(--text-sub);
    max-width:640px;
    margin-bottom:40px;
  }
  .section-head{
    margin-bottom:40px;
  }
  .section-head .section-sub{
    margin-bottom:0;
  }
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:12px 28px;
    border-radius:var(--radius-pill);
    font-size:15px;
    font-weight:600;
    cursor:pointer;
    transition:all 0.25s ease;
    text-decoration:none;
    border:1px solid transparent;
    white-space:nowrap;
    line-height:1.4;
  }
  .btn-primary{
    background:var(--gradient);
    color:#fff;
    box-shadow:0 4px 14px rgba(0,224,168,0.25);
  }
  .btn-primary:hover{
    transform:translateY(-2px);
    box-shadow:0 8px 24px rgba(0,224,168,0.35);
    color:#fff;
    text-decoration:none;
  }
  .btn-secondary{
    background:#fff;
    border-color:var(--line);
    color:var(--text-main);
  }
  .btn-secondary:hover{
    border-color:var(--brand);
    color:var(--success-green);
    transform:translateY(-2px);
    box-shadow:var(--shadow);
    text-decoration:none;
  }
  .btn-dark{
    background:var(--ink);
    color:#fff;
    border-color:transparent;
  }
  .btn-dark:hover{
    background:#1a2f42;
    transform:translateY(-2px);
    color:#fff;
    text-decoration:none;
  }
  .btn:active{
    transform:scale(0.97);
  }
  .btn:focus-visible,
  a:focus-visible,
  button:focus-visible,
  input:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
  }
  .btn-lg{
    padding:14px 34px;
    font-size:16px;
  }

  /* ===== Header ===== */
  .site-header{
    position:sticky;
    top:0;
    z-index:1000;
    background:rgba(247,249,244,0.9);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    height:64px;
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    height:64px;
    gap:16px;
  }
  .logo{
    display:inline-flex;
    align-items:center;
    gap:8px;
    text-decoration:none;
    flex-shrink:0;
  }
  .logo-icon{
    width:36px;
    height:36px;
    border-radius:10px;
    background:var(--gradient);
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:14px;
    font-weight:700;
    color:var(--ink);
    letter-spacing:0;
    line-height:1;
  }
  .logo-text{
    font-size:18px;
    font-weight:700;
    color:var(--ink);
    white-space:nowrap;
  }
  .main-nav{
    display:flex;
    align-items:center;
    gap:6px;
  }
  .nav-link{
    padding:8px 16px;
    border-radius:var(--radius-pill);
    font-size:14px;
    font-weight:600;
    color:var(--text-sub);
    text-decoration:none;
    transition:all 0.2s ease;
    white-space:nowrap;
  }
  .nav-link:hover{
    color:var(--ink);
    background:rgba(198,242,78,0.3);
    text-decoration:none;
  }
  .nav-link.active{
    color:var(--ink);
    background:var(--brand);
  }
  .header-actions{
    display:flex;
    align-items:center;
    gap:12px;
    flex-shrink:0;
  }
  .search-toggle{
    width:38px;
    height:38px;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    color:var(--text-sub);
    cursor:pointer;
    transition:background 0.2s;
    background:transparent;
    border:none;
    font-size:16px;
  }
  .search-toggle:hover{
    background:rgba(0,0,0,0.05);
    color:var(--ink);
  }
  .header-search-desktop{
    position:relative;
    display:flex;
    align-items:center;
  }
  .header-search-desktop input{
    width:180px;
    height:38px;
    border:1px solid var(--line);
    border-radius:var(--radius-pill);
    padding:0 14px 0 38px;
    font-size:13px;
    background:#fff;
    color:var(--text-main);
    transition:all 0.2s ease;
  }
  .header-search-desktop input::placeholder{
    color:var(--text-faint);
  }
  .header-search-desktop input:focus{
    border-color:var(--brand);
    box-shadow:0 0 0 3px rgba(198,242,78,0.25);
    width:200px;
  }
  .header-search-desktop .fa-magnifying-glass{
    position:absolute;
    left:14px;
    font-size:13px;
    color:var(--text-faint);
    pointer-events:none;
  }
  .header-search-desktop kbd{
    position:absolute;
    right:10px;
    font-family:var(--font-num);
    font-size:11px;
    color:var(--text-faint);
    border:1px solid var(--line);
    border-radius:4px;
    padding:2px 4px;
    background:#fafbfc;
    pointer-events:none;
  }
  .header-login-link{
    font-size:14px;
    font-weight:600;
    color:var(--text-main);
  }
  .header-login-link:hover{
    color:var(--success-green);
    text-decoration:none;
  }
  .header-cta{
    padding:10px 20px;
    font-size:14px;
  }
  .hamburger{
    display:none;
    width:38px;
    height:38px;
    border-radius:10px;
    background:transparent;
    border:1px solid var(--line);
    color:var(--text-main);
    cursor:pointer;
    align-items:center;
    justify-content:center;
    font-size:16px;
  }
  .hamburger:hover{
    background:rgba(0,0,0,0.05);
  }

  .mobile-menu{
    display:none;
    position:fixed;
    top:64px;
    left:0;
    right:0;
    bottom:0;
    background:var(--paper);
    z-index:999;
    padding:24px;
    flex-direction:column;
    gap:8px;
    overflow-y:auto;
  }
  .mobile-menu.open{
    display:flex;
  }
  .mobile-menu .nav-link{
    padding:14px 20px;
    font-size:16px;
    border-radius:var(--radius-md);
  }
  .mobile-menu .mobile-search{
    display:flex;
    align-items:center;
    margin-bottom:12px;
    position:relative;
  }
  .mobile-menu .mobile-search input{
    width:100%;
    height:46px;
    border:1px solid var(--line);
    border-radius:var(--radius-pill);
    padding:0 46px 0 20px;
    background:#fff;
    font-size:15px;
  }
  .mobile-menu .mobile-search .fa-magnifying-glass{
    position:absolute;
    right:16px;
    color:var(--text-faint);
  }

  /* ===== Hero ===== */
  .page-hero{
    padding:80px 0 60px;
    background:
      radial-gradient(ellipse at 80% 20%, rgba(198,242,78,0.15) 0%, transparent 55%),
      radial-gradient(ellipse at 10% 80%, rgba(0,224,168,0.1) 0%, transparent 50%),
      var(--paper);
    position:relative;
    overflow:hidden;
    border-bottom:1px solid rgba(228,235,230,0.6);
  }
  .page-hero::before{
    content:"";
    position:absolute;
    top:-80px;
    right:-80px;
    width:320px;
    height:320px;
    background:radial-gradient(circle, rgba(198,242,78,0.2) 0%, transparent 70%);
    border-radius:50%;
    pointer-events:none;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    bottom:-40px;
    left:30%;
    width:200px;
    height:200px;
    background:radial-gradient(circle, rgba(0,224,168,0.12) 0%, transparent 70%);
    border-radius:50%;
    pointer-events:none;
  }
  .page-hero .container{
    position:relative;
    z-index:2;
    display:flex;
    align-items:center;
    gap:50px;
  }
  .page-hero-left{
    flex:1.1;
    min-width:0;
  }
  .page-hero-right{
    flex:0.9;
    position:relative;
  }
  .hero-badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    background:var(--chip-bg);
    color:var(--success-green);
    border-radius:var(--radius-pill);
    padding:6px 16px;
    font-size:13px;
    font-weight:600;
    margin-bottom:20px;
  }
  .hero-badge i{
    font-size:12px;
  }
  .page-hero h1{
    font-size:38px;
    line-height:1.25;
    margin-bottom:16px;
  }
  .page-hero h1 .highlight{
    background:var(--gradient);
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
    background-clip:text;
    color:transparent;
  }
  .page-hero .lead{
    font-size:17px;
    color:var(--text-sub);
    margin-bottom:28px;
    max-width:540px;
  }
  .hero-ctas{
    display:flex;
    gap:14px;
    flex-wrap:wrap;
    margin-bottom:24px;
  }
  .hero-trust{
    display:flex;
    align-items:center;
    gap:16px;
    flex-wrap:wrap;
    font-size:13px;
    color:var(--text-faint);
  }
  .hero-trust .trust-item{
    display:inline-flex;
    align-items:center;
    gap:6px;
  }
  .hero-trust .trust-item i{
    color:var(--success-green);
    font-size:13px;
  }
  .hero-visual{
    background:var(--gradient);
    border-radius:var(--radius-lg);
    padding:40px 32px;
    position:relative;
    overflow:hidden;
    min-height:360px;
    display:flex;
    align-items:center;
    justify-content:center;
    box-shadow:0 16px 40px rgba(0,224,168,0.2);
  }
  .hero-visual img{
    max-height:320px;
    width:auto;
    border-radius:16px;
    box-shadow:var(--shadow-hover);
    position:relative;
    z-index:1;
  }
  .hero-visual::before{
    content:"";
    position:absolute;
    top:-40px;
    right:-40px;
    width:140px;
    height:140px;
    border:2px solid rgba(255,255,255,0.3);
    border-radius:50%;
  }
  .hero-visual::after{
    content:"";
    position:absolute;
    bottom:-20px;
    left:-20px;
    width:100px;
    height:100px;
    border:2px dashed rgba(255,255,255,0.25);
    border-radius:50%;
  }
  .hero-float-card{
    position:absolute;
    background:#fff;
    border-radius:16px;
    padding:12px 18px;
    box-shadow:var(--shadow-hover);
    display:flex;
    align-items:center;
    gap:10px;
    z-index:2;
  }
  .hero-float-card .float-icon{
    width:32px;
    height:32px;
    border-radius:8px;
    background:var(--chip-bg);
    display:flex;
    align-items:center;
    justify-content:center;
    color:var(--success-green);
    font-size:14px;
  }
  .hero-float-card .float-num{
    font-family:var(--font-num);
    font-size:18px;
    font-weight:700;
    color:var(--ink);
    line-height:1.2;
  }
  .hero-float-card .float-label{
    font-size:12px;
    color:var(--text-faint);
    line-height:1.2;
  }
  .hero-float-1{top:24px;right:-10px;}
  .hero-float-2{bottom:30px;left:-10px;}

  /* ===== Breadcrumb ===== */
  .breadcrumb-wrap{
    padding:18px 0;
    border-bottom:1px solid rgba(228,235,230,0.5);
    font-size:13px;
    color:var(--text-faint);
  }
  .breadcrumb-wrap a{
    color:var(--text-faint);
  }
  .breadcrumb-wrap a:hover{
    color:var(--success-green);
    text-decoration:none;
  }
  .breadcrumb-wrap .sep{
    margin:0 8px;
    color:var(--line);
  }
  .breadcrumb-wrap .current{
    color:var(--text-sub);
  }

  /* ===== Timeline Steps ===== */
  .steps-section{
    padding:var(--space-section) 0;
    position:relative;
  }
  .steps-section .section-head{
    text-align:center;
    max-width:640px;
    margin-left:auto;
    margin-right:auto;
  }
  .steps-section .section-title{
    font-size:32px;
  }
  .steps-section .section-sub{
    color:var(--text-sub);
    font-size:15px;
  }
  .steps-timeline{
    position:relative;
    max-width:820px;
    margin:0 auto;
    padding-left:0;
  }
  .step-item{
    position:relative;
    padding-left:80px;
    padding-bottom:56px;
  }
  .step-item:last-child{
    padding-bottom:0;
  }
  .step-item::before{
    content:"";
    position:absolute;
    left:32px;
    top:8px;
    bottom:0;
    width:2px;
    border-left:2px dashed var(--line);
  }
  .step-item:last-child::before{
    display:none;
  }
  .step-num{
    position:absolute;
    left:0;
    top:0;
    width:64px;
    height:64px;
    border-radius:50%;
    background:var(--gradient);
    display:flex;
    align-items:center;
    justify-content:center;
    font-family:var(--font-num);
    font-size:20px;
    font-weight:700;
    color:var(--ink);
    box-shadow:0 4px 16px rgba(0,224,168,0.25);
    z-index:1;
  }
  .step-content{
    background:var(--card);
    border-radius:var(--radius-lg);
    padding:28px 32px;
    box-shadow:var(--shadow);
    transition:box-shadow 0.3s ease, transform 0.3s ease;
    position:relative;
  }
  .step-content:hover{
    box-shadow:var(--shadow-hover);
    transform:translateY(-3px);
  }
  .step-content .step-tag{
    display:inline-block;
    background:var(--chip-bg);
    color:var(--success-green);
    font-size:12px;
    font-weight:600;
    padding:4px 12px;
    border-radius:var(--radius-sm);
    margin-bottom:10px;
  }
  .step-content h3{
    font-size:20px;
    font-weight:700;
    margin-bottom:10px;
    color:var(--ink);
  }
  .step-content p{
    font-size:15px;
    color:var(--text-sub);
    line-height:1.8;
  }
  .step-content .step-tip{
    margin-top:14px;
    padding:12px 16px;
    background:#F0F7F1;
    border-left:4px solid var(--accent);
    border-radius:0 var(--radius-sm) var(--radius-sm) 0;
    font-size:14px;
    color:var(--text-sub);
  }
  .step-content .step-tip i{
    color:var(--accent);
    margin-right:6px;
  }
  .step-content .step-screenshot{
    margin-top:18px;
    border-radius:12px;
    overflow:hidden;
  }
  .step-content .step-screenshot img{
    width:100%;
    max-height:220px;
    object-fit:cover;
    border-radius:12px;
  }

  /* ===== Device Support ===== */
  .device-section{
    background:#fff;
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
  }
  .device-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:20px;
  }
  .device-card{
    background:var(--paper);
    border-radius:var(--radius-lg);
    padding:28px 24px;
    border:1px solid rgba(228,235,230,0.6);
    transition:all 0.3s ease;
  }
  .device-card:hover{
    border-color:var(--brand);
    box-shadow:var(--shadow);
    transform:translateY(-4px);
  }
  .device-icon{
    width:48px;
    height:48px;
    border-radius:12px;
    background:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:22px;
    color:var(--ink);
    margin-bottom:16px;
    box-shadow:var(--shadow);
  }
  .device-card h3{
    font-size:18px;
    font-weight:700;
    margin-bottom:8px;
  }
  .device-card p{
    font-size:13px;
    color:var(--text-faint);
    line-height:1.7;
    margin-bottom:12px;
  }
  .device-card .device-meta{
    font-size:13px;
    color:var(--text-sub);
    line-height:1.8;
    border-top:1px solid var(--line);
    padding-top:12px;
  }
  .device-card .device-meta span{
    display:block;
  }
  .device-card .device-meta strong{
    font-weight:600;
    color:var(--ink);
    font-family:var(--font-num);
  }

  /* ===== Quick FAQ Links ===== */
  .quick-faq{
    padding:var(--space-section) 0;
  }
  .quick-faq-inner{
    background:var(--ink);
    border-radius:24px;
    padding:44px;
    position:relative;
    overflow:hidden;
  }
  .quick-faq-inner::before{
    content:"";
    position:absolute;
    top:-60px;
    right:-60px;
    width:180px;
    height:180px;
    border:2px solid rgba(198,242,78,0.2);
    border-radius:50%;
  }
  .quick-faq-inner::after{
    content:"";
    position:absolute;
    bottom:-40px;
    left:20%;
    width:120px;
    height:120px;
    border:1px dashed rgba(0,224,168,0.3);
    border-radius:50%;
  }
  .quick-faq .section-title{
    color:#fff;
  }
  .quick-faq .section-sub{
    color:rgba(255,255,255,0.7);
  }
  .quick-faq-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:16px;
    position:relative;
    z-index:2;
    margin-top:28px;
  }
  .quick-faq-card{
    background:rgba(255,255,255,0.06);
    border:1px solid rgba(255,255,255,0.1);
    border-radius:16px;
    padding:20px;
    transition:all 0.3s ease;
  }
  .quick-faq-card:hover{
    background:rgba(255,255,255,0.12);
    border-color:rgba(198,242,78,0.3);
    transform:translateY(-3px);
  }
  .quick-faq-card .quick-icon{
    width:42px;
    height:42px;
    border-radius:10px;
    background:var(--gradient);
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:16px;
    color:var(--ink);
    margin-bottom:14px;
  }
  .quick-faq-card h3{
    font-size:16px;
    color:#fff;
    margin-bottom:6px;
  }
  .quick-faq-card p{
    font-size:13px;
    color:rgba(255,255,255,0.6);
    line-height:1.7;
  }
  .quick-faq-card a{
    display:inline-block;
    margin-top:10px;
    font-size:14px;
    color:var(--brand);
    font-weight:600;
  }
  .quick-faq-card a:hover{
    color:var(--accent);
    text-decoration:none;
  }

  /* ===== FAQ ===== */
  .faq-section{
    padding:var(--space-section) 0;
  }
  .faq-layout{
    display:flex;
    gap:40px;
  }
  .faq-main{
    flex:1.4;
  }
  .faq-side{
    flex:1;
  }
  .faq-accordion{
    display:flex;
    flex-direction:column;
    gap:14px;
  }
  .faq-item{
    background:var(--card);
    border-radius:16px;
    border:1px solid var(--line);
    overflow:hidden;
    transition:border-color 0.2s ease, box-shadow 0.2s ease;
  }
  .faq-item:hover{
    border-color:var(--brand);
    box-shadow:var(--shadow);
  }
  .faq-question{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:20px 24px;
    cursor:pointer;
    font-size:16px;
    font-weight:600;
    color:var(--ink);
    transition:background 0.2s;
    user-select:none;
    gap:16px;
    width:100%;
    text-align:left;
    background:none;
    border:none;
  }
  .faq-question:hover{
    color:var(--success-green);
  }
  .faq-question .faq-icon{
    width:28px;
    height:28px;
    border-radius:50%;
    flex-shrink:0;
    display:flex;
    align-items:center;
    justify-content:center;
    background:var(--chip-bg);
    color:var(--success-green);
    font-size:14px;
    transition:transform 0.3s ease;
  }
  .faq-item.open .faq-question .faq-icon{
    transform:rotate(45deg);
    background:var(--ink);
    color:var(--brand);
  }
  .faq-answer{
    max-height:0;
    overflow:hidden;
    transition:max-height 0.35s ease;
  }
  .faq-answer-inner{
    padding:0 24px 20px;
    font-size:14px;
    color:var(--text-sub);
    line-height:1.8;
  }
  .faq-item.open .faq-answer{
    max-height:300px;
  }

  .faq-side-card{
    background:var(--ink);
    border-radius:var(--radius-lg);
    padding:32px;
    color:#fff;
    position:relative;
    overflow:hidden;
  }
  .faq-side-card::before{
    content:"";
    position:absolute;
    top:-30px;
    right:-30px;
    width:100px;
    height:100px;
    background:rgba(198,242,78,0.15);
    border-radius:50%;
  }
  .faq-side-card h3{
    color:#fff;
    margin-bottom:8px;
    font-size:20px;
    position:relative;
  }
  .faq-side-card > p{
    color:rgba(255,255,255,0.7);
    font-size:14px;
    margin-bottom:20px;
    position:relative;
  }
  .contact-form{
    position:relative;
  }
  .contact-form .form-group{
    margin-bottom:14px;
  }
  .contact-form label{
    display:block;
    font-size:13px;
    color:rgba(255,255,255,0.8);
    margin-bottom:6px;
    font-weight:500;
  }
  .contact-form input,
  .contact-form textarea{
    width:100%;
    background:rgba(255,255,255,0.08);
    border:1px solid rgba(255,255,255,0.15);
    border-radius:12px;
    padding:12px 16px;
    color:#fff;
    font-size:14px;
    transition:border-color 0.2s, box-shadow 0.2s;
  }
  .contact-form input::placeholder,
  .contact-form textarea::placeholder{
    color:rgba(255,255,255,0.4);
  }
  .contact-form input:focus,
  .contact-form textarea:focus{
    border-color:var(--brand);
    box-shadow:0 0 0 3px rgba(198,242,78,0.15);
  }
  .contact-form textarea{
    min-height:80px;
    resize:vertical;
  }
  .contact-form .btn-submit{
    width:100%;
    background:var(--gradient);
    color:var(--ink);
    font-weight:700;
    padding:12px 20px;
    border-radius:var(--radius-pill);
    cursor:pointer;
    transition:all 0.2s;
    font-size:14px;
  }
  .contact-form .btn-submit:hover{
    transform:translateY(-2px);
    box-shadow:0 8px 24px rgba(198,242,78,0.3);
  }

  /* ===== CTA ===== */
  .cta-section{
    padding:0 0 var(--space-section);
  }
  .cta-card{
    background:var(--card);
    border-radius:24px;
    padding:52px 48px;
    background-image:url('/assets/images/backpic/back-2.webp');
    background-size:cover;
    background-position:center;
    position:relative;
    overflow:hidden;
    text-align:center;
    min-height:320px;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
  }
  .cta-card::before{
    content:"";
    position:absolute;
    inset:0;
    background:rgba(247,249,244,0.92);
  }
  .cta-card > *{
    position:relative;
    z-index:2;
  }
  .cta-card h2{
    font-size:30px;
    margin-bottom:12px;
  }
  .cta-card p{
    font-size:16px;
    color:var(--text-sub);
    margin-bottom:28px;
    max-width:480px;
  }
  .cta-card .btn-group{
    display:flex;
    justify-content:center;
    gap:14px;
    flex-wrap:wrap;
  }

  /* ===== Footer ===== */
  .site-footer{
    background:var(--ink);
    color:rgba(255,255,255,0.7);
    padding-top:56px;
  }
  .site-footer .container{
    padding-bottom:10px;
  }
  .footer-top{
    display:flex;
    gap:48px;
    justify-content:space-between;
    flex-wrap:wrap;
    padding-bottom:36px;
    border-bottom:1px solid rgba(255,255,255,0.08);
  }
  .footer-brand{
    max-width:280px;
  }
  .footer-brand p{
    font-size:14px;
    color:rgba(255,255,255,0.6);
    line-height:1.8;
    margin-top:14px;
  }
  .logo-light .logo-icon{
    background:var(--gradient);
    color:var(--ink);
  }
  .logo-light .logo-text{
    color:#fff;
    font-size:18px;
  }
  .footer-cols{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:40px;
  }
  .footer-col h4{
    font-size:14px;
    font-weight:600;
    color:#fff;
    margin-bottom:14px;
  }
  .footer-col a{
    display:block;
    font-size:13px;
    color:rgba(255,255,255,0.6);
    margin-bottom:10px;
    transition:color 0.2s;
    line-height:1.6;
  }
  .footer-col a:hover{
    color:var(--brand);
    text-decoration:none;
  }
  .footer-bottom{
    padding:22px 8px;
    text-align:center;
    font-size:13px;
    color:rgba(255,255,255,0.4);
  }

  /* ===== Media Queries ===== */
  @media (max-width:1024px){
    .container{
      padding:0 20px;
    }
    .header-search-desktop input{
      width:140px;
    }
    .header-search-desktop input:focus{
      width:150px;
    }
    .header-login-link{
      display:none;
    }
    .hero-float-1{right:-6px;}
    .hero-float-2{left:-6px;}
    .device-grid{
      grid-template-columns:repeat(2,1fr);
    }
    .quick-faq-grid{
      grid-template-columns:repeat(2,1fr);
    }
    .faq-layout{
      flex-direction:column;
    }
  }
  @media (max-width:992px){
    .main-nav{
      display:none;
    }
    .hamburger{
      display:flex;
    }
    .header-search-desktop{
      display:none;
    }
    .header-cta{
      display:none;
    }
  }
  @media (max-width:768px){
    :root{
      --space-section:50px;
    }
    h1{font-size:28px;}
    h2{font-size:24px;}
    .page-hero{
      padding:48px 0 40px;
    }
    .page-hero .container{
      flex-direction:column;
      gap:36px;
    }
    .page-hero h1{
      font-size:28px;
    }
    .page-hero .lead{
      font-size:15px;
    }
    .hero-visual{
      min-height:260px;
      padding:28px 20px;
    }
    .hero-float-1{top:10px;right:4px;}
    .hero-float-2{bottom:14px;left:4px;}
    .step-item{
      padding-left:60px;
    }
    .step-num{
      width:48px;
      height:48px;
      font-size:16px;
    }
    .step-item::before{
      left:24px;
    }
    .step-content{
      padding:20px;
    }
    .device-grid{
      grid-template-columns:1fr;
      gap:14px;
    }
    .quick-faq-inner{
      padding:28px 20px;
    }
    .quick-faq-grid{
      grid-template-columns:1fr;
      gap:12px;
    }
    .faq-layout{
      flex-direction:column;
    }
    .cta-card{
      padding:36px 20px;
    }
    .cta-card h2{
      font-size:24px;
    }
    .cta-card .btn-group{
      flex-direction:column;
      align-items:stretch;
    }
    .cta-card .btn-group .btn{
      width:100%;
    }
    .footer-top{
      flex-direction:column;
      gap:32px;
    }
    .footer-cols{
      grid-template-columns:repeat(2,1fr);
      gap:24px;
    }
  }
  @media (max-width:520px){
    .container{
      padding:0 16px;
    }
    .page-hero h1{
      font-size:24px;
    }
    .hero-ctas{
      flex-direction:column;
      align-items:stretch;
    }
    .hero-ctas .btn{
      width:100%;
    }
    .hero-trust{
      font-size:12px;
      gap:10px;
    }
    .hero-visual{
      min-height:220px;
    }
    .hero-float-card{
      padding:8px 12px;
    }
    .hero-float-card .float-num{
      font-size:15px;
    }
    .hero-float-card .float-label{
      font-size:11px;
    }
    .step-item{
      padding-left:0;
      padding-bottom:40px;
    }
    .step-item::before{
      display:none;
    }
    .step-num{
      position:relative;
      width:44px;
      height:44px;
      font-size:15px;
      margin-bottom:12px;
    }
    .step-content{
      padding:18px;
    }
    .step-content h3{
      font-size:18px;
    }
    .step-content p{
      font-size:14px;
    }
    .quick-faq-inner{
      padding:24px 16px;
    }
    .faq-question{
      padding:16px;
      font-size:15px;
    }
    .faq-answer-inner{
      padding:0 16px 16px;
    }
    .faq-side-card{
      padding:24px;
    }
    .cta-card{
      padding:28px 16px;
    }
    .footer-cols{
      grid-template-columns:1fr;
    }
  }

/* roulang page: category3 */
:root {
  --brand: #C6F24E;
  --accent: #00E0A8;
  --gradient: linear-gradient(135deg, #C6F24E 0%, #00E0A8 100%);
  --ink: #0D1B2A;
  --paper: #F7F9F4;
  --card: #FFFFFF;
  --text-main: #1C2B36;
  --text-sub: #5E6E7B;
  --text-faint: #8A9AA6;
  --line: #E4EBE6;
  --font: "Noto Sans SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Inter", "DIN Alternate", "Roboto Mono", monospace;
  --radius-lg: 24px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow: 0 8px 30px rgba(13, 27, 42, 0.08);
  --shadow-hover: 0 12px 40px rgba(13, 27, 42, 0.14);
  --container: 1200px;
  --gutter: 24px;
  --space-section: 88px;
  --transition: all 0.3s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--paper);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input, textarea {
  font-family: inherit;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient);
  color: var(--ink);
  font-weight: 700;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0;
  flex-shrink: 0;
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.3px;
  white-space: nowrap;
}
.logo-light .logo-text {
  color: #fff;
}
.logo-light .logo-icon {
  color: #fff;
  background: var(--gradient);
}
/* ===== Header Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 249, 244, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  height: 64px;
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}
.nav-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--text-main);
  background: rgba(198, 242, 78, 0.2);
}
.nav-link.active {
  color: var(--ink);
  background: var(--brand);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-box .search-input {
  width: 180px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 0 14px 0 34px;
  font-size: 13px;
  color: var(--text-main);
  background: #fff;
  outline: none;
  transition: var(--transition);
}
.search-box .search-input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(198, 242, 78, 0.35);
  width: 220px;
}
.search-box .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-faint);
  font-size: 14px;
  pointer-events: none;
}
.search-box .search-kbd {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  color: var(--text-faint);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: var(--font-num);
  pointer-events: none;
}
.header-login {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  white-space: nowrap;
}
.header-login:hover {
  color: var(--ink);
}
.btn-download-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--gradient);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(0, 224, 168, 0.25);
}
.btn-download-nav:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-download-nav:active {
  transform: scale(0.97);
}
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text-main);
  border: 1px solid var(--line);
  background: #fff;
}
/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1.4;
}
.btn-primary {
  background: var(--gradient);
  color: var(--ink);
  box-shadow: 0 6px 20px rgba(0, 224, 168, 0.28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-primary:active {
  transform: scale(0.97);
}
.btn-outline {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--brand);
  color: #2D6A4F;
  box-shadow: 0 4px 14px rgba(198, 242, 78, 0.3);
}
.btn-outline:active {
  transform: scale(0.97);
}
.btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
}
/* ===== Hero ===== */
.page-hero {
  position: relative;
  padding: 72px 0 64px;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(198, 242, 78, 0.15) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(198, 242, 78, 0.15) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse at top, rgba(0,0,0,0.6) 0%, transparent 70%);
  mask-image: radial-gradient(ellipse at top, rgba(0,0,0,0.6) 0%, transparent 70%);
}
.hero-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 48px;
}
.hero-content {
  flex: 1.2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(198, 242, 78, 0.25);
  border: 1px solid rgba(45, 106, 79, 0.2);
  color: #2D6A4F;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}
.hero-badge .badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 224, 168, 0.25);
}
.page-hero h1 {
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 16px;
}
.page-hero h1 .highlight {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}
.page-hero .hero-desc {
  font-size: 16px;
  color: var(--text-sub);
  max-width: 560px;
  margin-bottom: 28px;
}
.hero-meta-stats {
  display: flex;
  gap: 28px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.stat-item {
  display: flex;
  align-items: center;
  gap: 10px;
}
.stat-item .stat-num {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  background: rgba(198, 242, 78, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
}
.stat-item .stat-label {
  font-size: 13px;
  color: var(--text-sub);
}
.hero-visual {
  flex: 1;
  position: relative;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual .hero-card {
  width: 100%;
  max-width: 430px;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}
.hero-visual .hero-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.hero-card-body {
  padding: 20px 24px 24px;
}
.hero-card-body h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}
.hero-card-body p {
  font-size: 13px;
  color: var(--text-sub);
}
.hero-float-badge {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
}
.float-1 {
  top: 20px;
  right: -10px;
  border-top: 3px solid var(--brand);
}
.float-2 {
  bottom: 40px;
  left: -16px;
  border-top: 3px solid var(--accent);
}
.hero-float-badge .badge-icon {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(198, 242, 78, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}
/* ===== Section ===== */
.section {
  padding: var(--space-section) 0;
}
.section-alt {
  background: #fff;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-head .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: #2D6A4F;
  background: rgba(198, 242, 78, 0.3);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.7;
}
/* ===== FAQ Quick Nav ===== */
.quick-nav-wrap {
  padding: 28px 0 0;
}
.quick-nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  list-style: none;
}
.quick-nav-list li a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border: 1px solid var(--line);
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  transition: var(--transition);
}
.quick-nav-list li a:hover {
  border-color: var(--brand);
  color: var(--ink);
  box-shadow: 0 4px 14px rgba(198, 242, 78, 0.25);
  transform: translateY(-2px);
}
.quick-nav-list li a .num {
  font-family: var(--font-num);
  font-size: 12px;
  background: rgba(198, 242, 78, 0.4);
  color: var(--ink);
  padding: 1px 8px;
  border-radius: 99px;
  font-weight: 700;
}
/* ===== FAQ Accordion ===== */
.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid transparent;
  margin-bottom: 16px;
  transition: var(--transition);
  overflow: hidden;
}
.faq-item:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(198, 242, 78, 0.5);
}
.faq-item.open {
  border-color: rgba(198, 242, 78, 0.7);
  box-shadow: 0 12px 40px rgba(198, 242, 78, 0.12);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  background: transparent;
  transition: var(--transition);
}
.faq-question:hover {
  background: rgba(198, 242, 78, 0.06);
}
.faq-q-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: rgba(198, 242, 78, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  color: #2D6A4F;
  transition: var(--transition);
}
.faq-q-text {
  flex: 1;
}
.faq-arrow {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-faint);
  transition: var(--transition);
}
.faq-item.open .faq-arrow {
  transform: rotate(135deg);
  background: var(--brand);
  border-color: var(--brand);
  color: var(--ink);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-item.open .faq-answer {
  max-height: 600px;
}
.faq-answer-inner {
  padding: 0 24px 24px 72px;
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}
.faq-answer-inner p {
  margin-bottom: 12px;
}
.faq-answer-inner ul {
  padding-left: 20px;
  margin: 10px 0;
}
.faq-answer-inner ul li {
  margin-bottom: 6px;
  position: relative;
}
.faq-answer-inner ul li::before {
  content: '';
  position: absolute;
  left: -14px;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.faq-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.faq-mini-tag {
  font-size: 12px;
  font-weight: 600;
  background: rgba(198, 242, 78, 0.2);
  color: #2D6A4F;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}
/* ===== Support Card ===== */
.support-section {
  padding: 64px 0 var(--space-section);
}
.support-card {
  background: var(--ink);
  border-radius: var(--radius-lg);
  padding: 48px;
  color: #fff;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
}
.support-card::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(198, 242, 78, 0.08);
}
.support-card::after {
  content: '';
  position: absolute;
  bottom: -40px;
  right: 120px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(0, 224, 168, 0.06);
}
.support-info {
  position: relative;
  z-index: 1;
}
.support-info h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 14px;
  color: #fff;
}
.support-info p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.75;
  margin-bottom: 20px;
}
.support-methods {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}
.support-method {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}
.support-method i {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: rgba(198, 242, 78, 0.15);
  border: 1px solid rgba(198, 242, 78, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--brand);
  flex-shrink: 0;
}
.support-form {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  color: var(--text-main);
  position: relative;
  z-index: 1;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}
.support-form h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-main);
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-sub);
  margin-bottom: 6px;
}
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  font-size: 14px;
  color: var(--text-main);
  background: var(--paper);
  outline: none;
  transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(198, 242, 78, 0.3);
  background: #fff;
}
.form-group textarea {
  resize: vertical;
  min-height: 80px;
}
.form-submit {
  width: 100%;
  background: var(--gradient);
  color: var(--ink);
  font-weight: 700;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  transition: var(--transition);
}
.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.form-submit:active {
  transform: scale(0.97);
}
.form-hint {
  font-size: 12px;
  color: var(--text-faint);
  margin-top: 10px;
  text-align: center;
}
/* ===== Info Banners ===== */
.info-banner-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 48px;
}
.info-banner {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--brand);
  transition: var(--transition);
}
.info-banner:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.info-banner .banner-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(198, 242, 78, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.info-banner h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}
.info-banner p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}
/* ===== CTA ===== */
.cta-section {
  padding: 0 0 var(--space-section);
}
.cta-card {
  background: var(--ink);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient);
}
.cta-card h2 {
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  position: relative;
}
.cta-card p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 520px;
  margin: 0 auto 32px;
  position: relative;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
}
.cta-buttons .btn-primary {
  background: var(--gradient);
  color: var(--ink);
}
.cta-buttons .btn-outline-light {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
}
.cta-buttons .btn-outline-light:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: rgba(198, 242, 78, 0.08);
}
/* ===== Footer ===== */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.8);
  padding: 64px 0 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 14px;
  line-height: 1.7;
  max-width: 320px;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  padding: 5px 0;
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--brand);
  padding-left: 4px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  flex-wrap: wrap;
  gap: 8px;
}
/* ===== Scroll To Top ===== */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--ink);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow);
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}
.scroll-top:hover {
  background: var(--brand);
  color: var(--ink);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
/* ===== Mobile Search Overlay ===== */
.mobile-search-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  color: var(--text-main);
}
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(13, 27, 42, 0.5);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 80px 20px;
}
.search-overlay.active {
  display: flex;
}
.search-overlay-panel {
  width: 100%;
  max-width: 560px;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-hover);
}
.search-overlay-panel input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 16px;
  outline: none;
  transition: var(--transition);
}
.search-overlay-panel input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(198, 242, 78, 0.3);
}
.search-overlay-close {
  position: absolute;
  top: 60px;
  right: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  color: var(--ink);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  cursor: pointer;
}
/* ===== Responsive ===== */
@media (max-width: 991px) {
  .site-header {
    height: auto;
  }
  .desktop-search {
    display: none;
  }
  .mobile-search-toggle {
    display: inline-flex;
  }
  .header-inner {
    height: 64px;
  }
  .main-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
  .header-actions .btn-download-nav {
    display: none;
  }
  .page-hero h1 {
    font-size: 32px;
  }
  .hero-inner {
    flex-direction: column;
    gap: 32px;
  }
  .hero-visual {
    width: 100%;
    min-height: auto;
  }
  .hero-visual .hero-card {
    max-width: 100%;
  }
  .float-1 {
    right: 8px;
  }
  .float-2 {
    left: 8px;
  }
  .support-card {
    grid-template-columns: 1fr;
    padding: 32px;
  }
  .faq-answer-inner {
    padding-left: 24px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-cols {
    grid-template-columns: repeat(2, 1fr);
  }
  .info-banner-row {
    grid-template-columns: 1fr;
  }
  .cta-card {
    padding: 40px 28px;
  }
}
@media (max-width: 767px) {
  :root {
    --gutter: 16px;
    --space-section: 56px;
  }
  .page-hero {
    padding: 48px 0 40px;
  }
  .page-hero h1 {
    font-size: 27px;
  }
  .page-hero .hero-desc {
    font-size: 15px;
  }
  .hero-meta-stats {
    gap: 16px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .faq-question {
    padding: 18px 16px;
    font-size: 14px;
    gap: 12px;
  }
  .faq-q-icon {
    width: 28px;
    height: 28px;
    font-size: 12px;
    border-radius: 8px;
  }
  .faq-answer-inner {
    padding: 0 16px 18px 16px;
    font-size: 14px;
  }
  .support-card {
    padding: 24px 18px;
  }
  .support-form {
    padding: 24px 20px;
  }
  .cta-card h2 {
    font-size: 24px;
  }
  .cta-buttons .btn {
    width: 100%;
  }
  .footer-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .header-login {
    display: none;
  }
  .logo-text {
    font-size: 16px;
  }
  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 12px;
  }
}
/* Mobile nav drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 64px;
  right: -100%;
  width: 280px;
  height: calc(100vh - 64px);
  background: #fff;
  z-index: 120;
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.1);
  transition: right 0.3s ease;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav-drawer.open {
  right: 0;
}
.mobile-nav-drawer .nav-link {
  padding: 14px 16px;
  font-size: 15px;
  border-radius: 12px;
}
.mobile-nav-drawer .nav-link.active {
  background: var(--brand);
  color: var(--ink);
}
.mobile-drawer-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.mobile-drawer-footer .btn {
  width: 100%;
}
.mobile-nav-mask {
  position: fixed;
  inset: 64px 0 0 0;
  background: rgba(13, 27, 42, 0.4);
  z-index: 110;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.mobile-nav-mask.show {
  opacity: 1;
  visibility: visible;
}

/* roulang page: article */
:root {
  --brand: #C6F24E;
  --accent: #00E0A8;
  --gradient: linear-gradient(135deg, #C6F24E 0%, #00E0A8 100%);
  --ink: #0D1B2A;
  --paper: #F7F9F4;
  --card: #FFFFFF;
  --text-main: #1C2B36;
  --text-sub: #5E6E7B;
  --text-faint: #8A9AA6;
  --line: #E4EBE6;
  --brand-soft: #EAF7C8;
  --brand-deep: #2D6A4F;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow: 0 8px 30px rgba(13, 27, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(13, 27, 42, 0.14);
  --font-sans: "Noto Sans SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Inter", "DIN Alternate", "Roboto Mono", ui-monospace, monospace;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

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

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

a {
  color: #1E7A5A;
  text-decoration: none;
  transition: color .2s ease;
}

a:hover {
  color: #145C40;
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

input {
  font-family: inherit;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  border: 1px solid transparent;
  transition: all .25s ease;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 6px 20px rgba(0, 224, 168, 0.32);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 224, 168, 0.44);
  text-decoration: none;
}

.btn-primary:active {
  transform: scale(0.97);
}

.btn-outline {
  background: #fff;
  border-color: var(--line);
  color: var(--text-main);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--brand-deep);
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-outline:active {
  transform: scale(0.97);
}

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

.btn-lg {
  padding: 14px 36px;
  font-size: 16px;
}

.btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(247, 249, 244, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 64px;
}

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

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--gradient);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(198, 242, 78, 0.35);
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
}

.logo:hover .logo-text {
  color: var(--brand-deep);
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  transition: all .22s ease;
}

.nav-link:hover {
  color: var(--text-main);
  background: #EDF3E9;
  text-decoration: none;
}

.nav-link.active {
  color: var(--brand-deep);
  background: var(--brand-soft);
}

.nav-link:active {
  transform: scale(0.96);
}

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

.header-login {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  padding: 6px 4px;
}

.header-login:hover {
  color: var(--brand-deep);
}

.search-box {
  position: relative;
}

.search-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 200px;
  height: 38px;
  padding: 0 12px 0 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text-faint);
  font-size: 13px;
  cursor: text;
  transition: all .22s ease;
}

.search-trigger:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 224, 168, 0.16);
}

.search-trigger input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  font-size: 13px;
  color: var(--text-main);
}

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

.search-trigger kbd {
  flex-shrink: 0;
  background: #F1F5EF;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 11px;
  font-family: var(--font-num);
  color: var(--text-faint);
}

.search-dropdown {
  position: absolute;
  top: 46px;
  right: 0;
  width: 320px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: none;
  z-index: 90;
}

.search-box.open .search-dropdown {
  display: block;
  animation: dropIn .18s ease;
}

@keyframes dropIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.search-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.hot-item {
  display: block;
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-sub);
  transition: all .18s ease;
}

.hot-item:hover {
  background: var(--brand-soft);
  color: var(--brand-deep);
  text-decoration: none;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  border-radius: 8px;
}

.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all .3s ease;
}

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

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

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

/* ===== Reading Progress ===== */
.reading-progress {
  position: fixed;
  top: 63px;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 999;
  pointer-events: none;
}

.progress-fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--gradient);
  border-radius: 0 3px 3px 0;
  transition: width .08s linear;
}

/* ===== Breadcrumb ===== */
.breadcrumb-wrap {
  position: relative;
  z-index: 1;
  padding-top: 4px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-faint);
}

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

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

.crumb-sep {
  color: var(--line);
}

.crumb-current {
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-main);
  font-weight: 600;
}

/* ===== Article Banner ===== */
.article-banner {
  position: relative;
  padding: 30px 0 44px;
  background: linear-gradient(180deg, #EAF7C8 0%, var(--paper) 100%);
  overflow: hidden;
}

.article-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: .1;
  pointer-events: none;
}

.article-banner .container {
  position: relative;
  z-index: 1;
}

.article-head {
  margin-top: 20px;
}

.article-head h1 {
  max-width: 820px;
  font-size: 36px;
  line-height: 1.32;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  color: var(--text-sub);
  font-size: 14px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item .icon {
  width: 16px;
  height: 16px;
  stroke: var(--text-faint);
}

.article-cat {
  background: var(--brand-soft);
  color: var(--brand-deep);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
}

.meta-num {
  font-family: var(--font-num);
  font-weight: 700;
}

/* ===== Article Layout ===== */
.article-page {
  padding: 44px 0 72px;
}

.article-layout {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 40px;
}

.article-col {
  width: 100%;
  max-width: 760px;
  flex-shrink: 0;
}

.article-toc {
  display: none;
  width: 200px;
  flex-shrink: 0;
}

@media (min-width: 1200px) {
  .article-toc.show {
    display: block;
    position: sticky;
    top: 96px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow);
  }
}

.toc-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
}

.toc-title .icon {
  width: 16px;
  height: 16px;
  color: #7BC74D;
}

.toc-link {
  display: block;
  font-size: 13px;
  color: var(--text-sub);
  padding: 7px 0;
  border-bottom: 1px dashed var(--line);
  transition: all .18s ease;
}

.toc-link:last-child {
  border-bottom: none;
}

.toc-link:hover {
  color: var(--brand-deep);
  padding-left: 6px;
  text-decoration: none;
}

/* ===== Article Cover ===== */
.article-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 32px;
  aspect-ratio: 16 / 9;
  position: relative;
}

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

/* ===== Article Body ===== */
.article-body {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.85;
  word-break: break-word;
}

.article-body > *:first-child {
  margin-top: 0;
}

.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin: 42px 0 16px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  letter-spacing: -0.2px;
  scroll-margin-top: 84px;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-main);
  margin: 30px 0 12px;
  scroll-margin-top: 84px;
}

.article-body p {
  margin-bottom: 18px;
}

.article-body strong {
  color: var(--text-main);
  font-weight: 600;
}

.article-body a {
  color: #1E7A5A;
  font-weight: 500;
}

.article-body a:hover {
  text-decoration: underline;
}

.article-body ul,
.article-body ol {
  margin: 0 0 20px 22px;
}

.article-body li {
  margin-bottom: 8px;
  padding-left: 2px;
}

.article-body ul li::marker {
  color: #7BC74D;
}

.article-body ol li::marker {
  color: var(--brand-deep);
  font-weight: 700;
  font-family: var(--font-num);
}

.article-body blockquote {
  border-left: 4px solid var(--brand);
  background: #F2F8EC;
  padding: 16px 22px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
  color: var(--text-main);
}

.article-body blockquote p {
  margin-bottom: 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-size: 15px;
}

.article-body th {
  background: #F2F8EC;
  color: var(--text-main);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.article-body td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--text-sub);
}

.article-body tr:last-child td {
  border-bottom: none;
}

.article-body tr:hover td {
  background: #FBFDF8;
}

.article-body img {
  border-radius: var(--radius-md);
  margin: 24px 0;
  box-shadow: var(--shadow);
  width: 100%;
  height: auto;
}

.article-body figure {
  margin: 24px 0;
}

.article-body figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--text-faint);
  margin-top: 10px;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 32px 0;
}

.article-body code {
  background: #F2F8EC;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 8px;
  font-family: var(--font-num);
  font-size: 14px;
  color: #145C40;
}

/* ===== Article Foot ===== */
.article-foot {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--brand-soft);
  color: var(--brand-deep);
  font-size: 13px;
  font-weight: 500;
  transition: all .2s ease;
}

.tag:hover {
  background: var(--brand);
  color: var(--ink);
}

.share-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.share-btn,
.like-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-sub);
  transition: all .22s ease;
  position: relative;
}

.share-btn .icon,
.like-btn .icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}

.share-btn:hover,
.like-btn:hover {
  border-color: var(--accent);
  color: var(--brand-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.share-btn:active,
.like-btn:active {
  transform: scale(0.94);
}

.like-btn.liked {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
}

.like-count {
  position: absolute;
  top: -6px;
  right: -6px;
  background: var(--ink);
  color: #fff;
  font-size: 11px;
  font-family: var(--font-num);
  font-weight: 700;
  border-radius: var(--radius-pill);
  padding: 1px 7px;
  line-height: 1.5;
}

/* ===== Empty State ===== */
.post-empty {
  padding: 64px 24px;
  text-align: center;
  background: #fff;
  border: 1px dashed var(--line);
  border-radius: var(--radius-lg);
}

.empty-ring {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: var(--brand-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.empty-num {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 800;
  color: var(--brand-deep);
}

.post-empty h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 22px;
}

/* ===== Related ===== */
.related-section {
  padding: 72px 0;
  background: #fff;
  border-top: 1px solid var(--line);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: var(--text-main);
}

.section-sub {
  font-size: 14px;
  color: var(--text-faint);
  margin-top: 4px;
}

.section-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-deep);
}

.section-more:hover {
  text-decoration: underline;
}

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

.related-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(13, 27, 42, 0.04);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity .3s ease;
  z-index: 2;
}

.related-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.related-card .thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.related-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}

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

.hot-rank {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 800;
  color: var(--ink);
  background: var(--brand);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  box-shadow: 0 4px 12px rgba(13, 27, 42, 0.18);
}

.related-card .card-body {
  padding: 20px 22px 24px;
}

.card-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--brand-deep);
  background: var(--brand-soft);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 10px;
}

.related-card h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-main);
  margin-bottom: 10px;
  transition: color .2s ease;
}

.related-card:hover h3 {
  color: var(--brand-deep);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-faint);
}

.card-meta .date {
  font-family: var(--font-num);
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background: var(--ink);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.1;
}

.cta-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 56px 40px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(135deg, rgba(198, 242, 78, 0.14) 0%, rgba(0, 224, 168, 0.14) 100%);
}

.cta-inner h2 {
  color: #fff;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 12px;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
  margin-bottom: 28px;
}

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

.cta-note {
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.6);
  padding: 64px 0 0;
}

.footer-top {
  display: flex;
  gap: 48px;
  justify-content: space-between;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  max-width: 320px;
}

.logo-light .logo-text {
  color: #fff;
}

.logo-light:hover .logo-text {
  color: var(--brand);
}

.footer-brand > p {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.5);
}

.footer-cols {
  flex: 1;
  max-width: 560px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
  margin-bottom: 10px;
  transition: color .2s ease;
}

.footer-col a:hover {
  color: var(--brand);
  text-decoration: none;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.38);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.38);
}

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

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--ink);
  color: #fff;
  padding: 12px 26px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all .3s ease;
  z-index: 1500;
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 14px 24px 22px;
    gap: 6px;
    display: none;
    box-shadow: 0 24px 40px rgba(13, 27, 42, 0.1);
    z-index: 980;
  }

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

  .nav-link {
    justify-content: center;
    padding: 12px 16px;
  }

  .search-trigger {
    width: 38px;
    padding: 0 10px;
  }

  .search-trigger input,
  .search-trigger kbd {
    display: none;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top {
    flex-direction: column;
  }

  .footer-cols {
    max-width: none;
  }

  .article-head h1 {
    font-size: 30px;
  }
}

@media (max-width: 767px) {
  .header-login,
  .header-cta {
    display: none;
  }

  .article-page {
    padding: 32px 0 56px;
  }

  .article-head h1 {
    font-size: 26px;
  }

  .search-trigger {
    width: 36px;
    height: 36px;
    padding: 0;
    justify-content: center;
  }

  .search-trigger .icon {
    width: 16px;
    height: 16px;
  }

  .search-dropdown {
    position: fixed;
    top: 56px;
    left: 16px;
    right: 16px;
    width: auto;
  }

  .article-meta {
    gap: 8px 12px;
    font-size: 13px;
  }

  .article-cover {
    margin-bottom: 24px;
  }

  .article-body {
    font-size: 15px;
    line-height: 1.8;
  }

  .article-body h2 {
    font-size: 21px;
    margin: 30px 0 14px;
  }

  .article-body h3 {
    font-size: 18px;
  }

  .article-foot {
    flex-direction: column;
    align-items: flex-start;
  }

  .share-wrap {
    align-self: flex-end;
  }

  .related-section {
    padding: 56px 0;
  }

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

  .cta-section {
    padding: 56px 0;
  }

  .cta-inner {
    padding: 40px 24px;
  }

  .cta-inner h2 {
    font-size: 24px;
  }

  .footer-top {
    gap: 32px;
    padding-bottom: 32px;
  }

  .footer-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 20px;
  }

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

@media (max-width: 520px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .article-banner {
    padding: 24px 0 36px;
  }

  .breadcrumb {
    gap: 6px;
    font-size: 13px;
  }

  .crumb-current {
    max-width: 180px;
  }

  .article-head h1 {
    font-size: 22px;
    line-height: 1.4;
  }

  .article-body table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

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