/* roulang page: index */
:root {
  --color-main: #131614;
  --color-accent: #C9F24B;
  --color-bg: #F7F7F4;
  --color-card: #FFFFFF;
  --color-text: #1C201E;
  --color-body: #555B57;
  --color-muted: #8A918D;
  --color-line: #E6E6E0;
  --color-success: #1B9C64;
  --color-warning: #E09B2D;
  --color-error: #D64545;
  --radius-btn: 12px;
  --radius-card: 16px;
  --radius-large: 20px;
  --shadow-card: 0 8px 28px rgba(19,22,20,0.08);
  --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding: 96px 0;
}

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

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.3;
}

h2 {
  font-size: 40px;
}

h3 {
  font-size: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 24px;
  height: 48px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-lg {
  height: 52px;
  padding: 0 32px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-main);
}

.btn-primary:hover {
  background: #A8D93A;
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(255,255,255,0.4);
  color: #fff;
}

.btn-outline-light:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}

.btn-outline-light:active {
  transform: scale(0.98);
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--color-line);
}

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

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

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--color-main);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

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

.site-nav {
  flex: 1;
  min-width: 0;
  position: relative;
}

.nav-chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 0 20px;
}

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

.nav-chip {
  height: 36px;
  padding: 0 20px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-body);
  white-space: nowrap;
  transition: all 0.2s ease;
}

.nav-chip:hover {
  background: #F0F0EC;
  color: var(--color-main);
}

.nav-chip.active {
  background: var(--color-main);
  color: var(--color-accent);
}

.site-nav::before,
.site-nav::after {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  width: 20px;
  pointer-events: none;
  opacity: 0;
  z-index: 2;
  transition: opacity 0.2s ease;
}

.site-nav::before {
  left: 0;
  background: linear-gradient(to right, #fff, transparent);
}

.site-nav::after {
  right: 0;
  background: linear-gradient(to left, #fff, transparent);
}

.header-cta {
  flex-shrink: 0;
}

.btn-download {
  height: 42px;
  padding: 0 20px;
}

/* ========== Hero ========== */
.hero {
  background: linear-gradient(90deg, rgba(19,22,20,0.92), rgba(19,22,20,0.65)), url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
  background-color: var(--color-main);
  color: #fff;
  padding: 80px 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: 56px;
  color: #fff;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
  max-width: 520px;
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.hero-trust {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  flex-wrap: wrap;
}

.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.hero-trust span::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

.hero-visual img {
  width: 100%;
  border-radius: var(--radius-large);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

/* ========== Stats ========== */
.stats-bar {
  background: #fff;
  border-bottom: 1px solid var(--color-line);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 40px 0;
}

.stat-item strong {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  margin-bottom: 4px;
  text-shadow: 0 0 0 #fff;
}

.stat-item span {
  font-size: 13px;
  color: var(--color-muted);
}

/* ========== Features ========== */
.feature-track-wrap {
  overflow: hidden;
}

.feature-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding-bottom: 20px;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}

.feature-track::-webkit-scrollbar {
  display: none;
}

.feature-card {
  flex: 0 0 360px;
  max-width: 360px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  scroll-snap-align: start;
  transition: all 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
  border-color: var(--color-main);
}

.feature-thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #F0F0EC;
}

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

.feature-card h3 {
  padding: 20px 20px 8px;
  font-size: 20px;
}

.feature-card p {
  padding: 0 20px 20px;
  color: var(--color-body);
  font-size: 15px;
}

.feature-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.arrow-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  background: #fff;
  color: var(--color-main);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all 0.2s;
}

.arrow-btn:hover {
  border-color: var(--color-main);
  color: var(--color-main);
}

.dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #D9DDD7;
  cursor: pointer;
  transition: all 0.2s;
}

.dot.active {
  width: 16px;
  border-radius: 999px;
  background: var(--color-main);
}

/* ========== System Requirements ========== */
.system-list {
  background: #F0F0EC;
  border-radius: var(--radius-card);
  padding: 8px 32px;
}

.system-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

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

.sys-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-main);
}

.sys-name span {
  display: block;
  font-size: 13px;
  font-weight: 400;
  color: var(--color-muted);
  margin-top: 4px;
}

.sys-desc {
  max-width: 560px;
  color: var(--color-body);
  text-align: right;
}

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

.testimonial-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 24px;
  transition: all 0.2s ease;
}

.testimonial-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
  border-color: var(--color-main);
}

.testimonial-top {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-main);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.testimonial-top .name {
  font-weight: 600;
  display: block;
}

.star {
  color: var(--color-accent);
  font-size: 14px;
  letter-spacing: 2px;
}

.testimonial-card p {
  color: var(--color-body);
  font-size: 15px;
}

/* ========== News List ========== */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-card {
  display: flex;
  gap: 20px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 16px;
  transition: all 0.2s ease;
}

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

.news-thumb {
  width: 96px;
  height: 96px;
  flex-shrink: 0;
  border-radius: 12px;
  overflow: hidden;
}

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

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

.news-content h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.news-content p {
  color: var(--color-body);
  font-size: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--color-muted);
  flex-wrap: wrap;
}

.badge {
  background: var(--color-main);
  color: var(--color-accent);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  white-space: nowrap;
}

.more-link {
  margin-left: auto;
  color: var(--color-main);
  font-weight: 600;
  transition: transform 0.2s;
  display: inline-block;
}

.news-card:hover .more-link {
  transform: translateX(4px);
}

.empty-state {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 48px 24px;
  text-align: center;
  color: var(--color-muted);
  font-size: 13px;
}

/* ========== FAQ ========== */
.faq-container {
  max-width: 800px;
}

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

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

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 24px 0;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: color 0.2s;
}

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

.faq-question::after {
  content: "+";
  font-size: 20px;
  color: var(--color-main);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.faq-item.active .faq-question::after {
  content: "−";
}

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

.faq-answer p {
  padding: 0 0 24px;
  color: var(--color-body);
  font-size: 15px;
}

/* ========== CTA Block ========== */
.cta-block {
  background: var(--color-main);
  color: #fff;
}

.cta-inner {
  padding: 96px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 64px;
}

.cta-copy h2 {
  font-size: 40px;
  color: #fff;
  margin-bottom: 12px;
}

.cta-copy > p {
  color: rgba(255,255,255,0.8);
  margin-bottom: 24px;
}

.cta-actions {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.qr-placeholder {
  width: 80px;
  height: 80px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.8);
  line-height: 1.4;
}

.cta-meta {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin-top: 20px;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--color-main);
  color: rgba(255,255,255,0.8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding: 64px 20px;
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.footer-brand p {
  margin-top: 12px;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  max-width: 320px;
}

.footer-nav h4,
.footer-legal h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
}

.footer-nav a,
.footer-legal a {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  transition: color 0.2s;
}

.footer-nav a:hover,
.footer-legal a:hover {
  color: var(--color-accent);
}

.footer-legal span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ========== Responsive ========== */
@media (max-width: 1023px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 44px;
  }

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

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

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

@media (max-width: 767px) {
  .section {
    padding: 64px 0;
  }

  h2 {
    font-size: 28px;
  }

  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 10px 0 12px;
  }

  .logo {
    order: 1;
  }

  .header-cta {
    order: 2;
    margin-left: auto;
  }

  .site-nav {
    order: 3;
    width: 100%;
    margin-top: 10px;
  }

  .nav-chips {
    padding: 0;
  }

  .site-nav::before,
  .site-nav::after {
    opacity: 1;
  }

  .nav-chip {
    height: 32px;
    padding: 0 14px;
    font-size: 13px;
  }

  .hero {
    padding: 64px 0;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero-sub {
    font-size: 16px;
  }

  .hero-actions {
    gap: 8px;
    flex-wrap: nowrap;
  }

  .btn-lg {
    height: 48px;
    padding: 0 20px;
    flex: 1;
  }

  .feature-track {
    gap: 16px;
  }

  .feature-card {
    flex: 0 0 300px;
    max-width: 300px;
  }

  .system-list {
    padding: 8px 20px;
  }

  .system-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .sys-desc {
    text-align: left;
  }

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

  .news-card {
    flex-direction: column;
  }

  .news-thumb {
    width: 100%;
    height: 160px;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .feature-controls {
    margin-top: 12px;
  }

  .cta-inner {
    flex-direction: column;
    padding: 64px 20px;
    gap: 32px;
  }

  .cta-copy h2 {
    font-size: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    padding: 48px 20px;
  }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --dark-green: #131614;
  --lime: #C9F24B;
  --lime-hover: #A8D93A;
  --bg-warm: #F7F7F4;
  --card-white: #FFFFFF;
  --text-main: #555B57;
  --text-sub: #8A918D;
  --border-hr: #E6E6E0;
  --shadow-card: 0 8px 28px rgba(19,22,20,0.08);
  --radius-btn: 12px;
  --radius-card: 16px;
  --radius-lg: 20px;
  --container-w: 1200px;
  --space-section: 96px;
  --space-section-mobile: 64px;
  --ease-200: 200ms ease;
  --max-width: 1200px;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
  background: var(--bg-warm);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--ease-200), border-color var(--ease-200), background var(--ease-200), transform var(--ease-200), box-shadow var(--ease-200);
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  transition: background var(--ease-200), transform var(--ease-200), color var(--ease-200), border-color var(--ease-200);
}

input, textarea {
  font-family: inherit;
  font-size: 16px;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  color: var(--dark-green);
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  margin: 0;
}

/* ===== 容器 ===== */
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 26px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--ease-200), color var(--ease-200), border-color var(--ease-200), transform var(--ease-200), box-shadow var(--ease-200);
  white-space: nowrap;
}

.btn-primary {
  background: var(--lime);
  color: var(--dark-green);
  border: 1px solid var(--lime);
}

.btn-primary:hover {
  background: var(--lime-hover);
  border-color: var(--lime-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(201, 242, 75, 0.25);
}

.btn-primary:active {
  transform: scale(0.98);
  box-shadow: none;
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.btn-outline:active {
  transform: scale(0.98);
}

.btn-outline-dark {
  background: var(--card-white);
  color: var(--dark-green);
  border: 1px solid var(--border-hr);
}

.btn-outline-dark:hover {
  border-color: var(--dark-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.btn-outline-dark:active {
  transform: scale(0.98);
}

.btn-download i {
  font-size: 18px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-hr);
}

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

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

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--dark-green);
  color: var(--lime);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
}

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

.site-nav {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.nav-chips {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  white-space: nowrap;
  position: relative;
}

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

.nav-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  background: transparent;
  transition: background var(--ease-200), color var(--ease-200);
  flex-shrink: 0;
}

.nav-chip:hover {
  background: #f0f0ec;
  color: var(--dark-green);
}

.nav-chip.active {
  background: var(--dark-green);
  color: var(--lime);
  font-weight: 600;
}

.header-cta {
  flex-shrink: 0;
}

.header-cta .btn {
  height: 44px;
  padding: 0 20px;
  font-size: 14px;
}

/* ===== Hero ===== */
.category-hero {
  background: var(--dark-green);
  padding: 80px 0 72px;
  position: relative;
  color: #fff;
}

.category-hero .hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  opacity: 0.16;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(201, 242, 75, 0.12);
  border: 1px solid rgba(201, 242, 75, 0.3);
  color: var(--lime);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge i {
  font-size: 14px;
}

.hero-title {
  color: #fff;
  font-size: 56px;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  max-width: 480px;
  margin-bottom: 36px;
}

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

.hero-visual {
  position: relative;
}

.hero-visual-inner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
  aspect-ratio: 4 / 3;
  background: #fff;
}

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

.hero-visual-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--dark-green);
  color: var(--lime);
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

/* ===== 数据条 ===== */
.stats-bar {
  background: var(--card-white);
  border-bottom: 1px solid var(--border-hr);
  padding: 24px 0;
}

.stats-grid {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  flex: 1;
  min-width: 140px;
}

.stat-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--lime);
  line-height: 1.3;
  background: var(--dark-green);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 13px;
  color: var(--text-sub);
  margin-top: 4px;
}

/* ===== 通用 section 头部 ===== */
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 40px;
  line-height: 1.3;
  position: relative;
}

.section-header p {
  color: var(--text-sub);
  font-size: 16px;
  max-width: 520px;
  text-align: right;
}

/* ===== 步骤大列表 ===== */
.steps-guide {
  padding: var(--space-section) 0;
  background: var(--bg-warm);
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 40px;
  background: var(--card-white);
  border: 1px solid var(--border-hr);
  border-radius: var(--radius-card);
  padding: 32px;
  transition: transform var(--ease-200), box-shadow var(--ease-200), border-color var(--ease-200);
}

.step-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
  border-color: var(--dark-green);
}

.step-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--lime);
  flex-shrink: 0;
  width: 56px;
  line-height: 1;
}

.step-content {
  flex: 1;
  min-width: 0;
}

.step-content h3 {
  font-size: 24px;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 16px;
  color: var(--text-sub);
  max-width: 640px;
}

.step-cover {
  width: 200px;
  height: 126px;
  border-radius: 12px;
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid rgba(19, 22, 20, 0.04);
}

.step-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}

.step-item:hover .step-cover img {
  transform: scale(1.05);
}

/* ===== 下载方式 ===== */
.download-methods {
  padding: 0 0 var(--space-section);
  background: var(--bg-warm);
}

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

.method-card {
  background: var(--card-white);
  border: 1px solid var(--border-hr);
  border-radius: var(--radius-card);
  padding: 32px;
  transition: transform var(--ease-200), box-shadow var(--ease-200), border-color var(--ease-200);
}

.method-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
  border-color: var(--dark-green);
}

.method-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--dark-green);
  color: var(--lime);
  font-size: 22px;
  margin-bottom: 20px;
}

.method-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.method-card p {
  font-size: 15px;
  color: var(--text-sub);
}

/* ===== 注意事项 ===== */
.notice-section {
  padding: 0 0 var(--space-section);
  background: var(--bg-warm);
}

.notice-wrapper {
  background: #F0F0EC;
  border-radius: var(--radius-card);
  padding: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.notice-item {
  display: flex;
  gap: 16px;
}

.notice-icon {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--lime);
  color: var(--dark-green);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.notice-item h4 {
  font-size: 16px;
  margin-bottom: 6px;
}

.notice-item p {
  font-size: 14px;
  color: var(--text-sub);
}

/* ===== FAQ ===== */
.faq-section {
  padding: 0 0 var(--space-section);
  background: var(--bg-warm);
}

.faq-list {
  max-width: 840px;
  margin: 0 auto;
  border-top: 1px solid var(--border-hr);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  cursor: pointer;
  font-size: 18px;
  font-weight: 600;
  color: var(--dark-green);
  transition: color var(--ease-200);
}

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

.faq-question .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border-hr);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-sub);
  transition: transform var(--ease-200), background var(--ease-200), color var(--ease-200);
  flex-shrink: 0;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease;
}

.faq-answer p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.8;
  padding-bottom: 24px;
  max-width: 720px;
}

.faq-item.open .faq-question .faq-icon {
  transform: rotate(45deg);
  background: var(--dark-green);
  border-color: var(--dark-green);
  color: var(--lime);
}

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

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  opacity: 0.12;
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}

.cta-left h2 {
  color: #fff;
  font-size: 40px;
  margin-bottom: 12px;
}

.cta-left p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 16px;
}

.cta-right {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.cta-qr {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  text-align: center;
  flex-shrink: 0;
}

.cta-version {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  line-height: 1.7;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-green);
  color: rgba(255, 255, 255, 0.7);
  padding-top: 64px;
}

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

.footer-logo {
  display: inline-block;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
  max-width: 320px;
}

.footer-nav h4,
.footer-legal h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 16px;
}

.footer-nav a,
.footer-legal a {
  display: block;
  font-size: 14px;
  padding: 6px 0;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--ease-200);
}

.footer-nav a:hover,
.footer-legal a:hover {
  color: var(--lime);
}

.footer-legal span {
  display: block;
  font-size: 13px;
  padding: 6px 0;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  text-align: center;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-title {
    font-size: 44px;
  }
  .hero-visual {
    max-width: 480px;
  }
  .stats-grid {
    gap: 16px;
  }
  .methods-grid {
    grid-template-columns: 1fr 1fr;
  }
  .notice-wrapper {
    grid-template-columns: 1fr;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .section-header p {
    text-align: left;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  :root {
    --space-section: 64px;
  }
  .header-inner {
    height: 64px;
    gap: 12px;
  }
  .logo-text {
    font-size: 17px;
  }
  .logo-mark {
    width: 30px;
    height: 30px;
    font-size: 16px;
    border-radius: 8px;
  }
  .header-cta .btn {
    height: 38px;
    padding: 0 14px;
    font-size: 13px;
  }
  .nav-chip {
    height: 32px;
    padding: 0 14px;
    font-size: 13px;
  }
  .category-hero {
    padding: 56px 0 48px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }
  .hero-actions .btn {
    width: 100%;
    height: 48px;
  }
  .stats-grid {
    flex-direction: column;
    gap: 16px;
  }
  .section-header h2 {
    font-size: 28px;
  }
  .step-item {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 16px;
  }
  .step-num {
    font-size: 28px;
  }
  .step-cover {
    width: 100%;
    height: 180px;
  }
  .methods-grid {
    grid-template-columns: 1fr;
  }
  .notice-wrapper {
    padding: 24px;
  }
  .faq-question {
    font-size: 16px;
    padding: 20px 0;
  }
  .cta-section {
    padding: 56px 0;
  }
  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
  .cta-right {
    width: 100%;
  }
  .cta-left h2 {
    font-size: 28px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* roulang page: article */
:root {
  --color-primary: #131614;
  --color-accent: #C9F24B;
  --color-bg: #F7F7F4;
  --color-card: #FFFFFF;
  --color-text: #555B57;
  --color-text-weak: #8A918D;
  --color-border: #E6E6E0;
  --color-soft: #F0F0EC;
  --color-success: #1B9C64;
  --color-warning: #E09B2D;
  --color-error: #D64545;
  --radius-btn: 12px;
  --radius-card: 16px;
  --radius-large: 20px;
  --radius-full: 9999px;
  --shadow-card: 0 8px 28px rgba(19, 22, 20, 0.08);
  --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
  --container-width: 1200px;
  --space-section: 96px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img {
  max-width: 100%;
  display: block;
  border: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Button ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(19, 22, 20, 0.18);
}
.btn-primary:active {
  transform: scale(0.98);
  box-shadow: none;
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #ffffff;
  transform: translateY(-2px);
}
.btn-outline:active {
  transform: scale(0.98);
}
.btn-download {
  height: 42px;
  padding: 0 22px;
  font-size: 14px;
}
.btn-download .icon-download {
  margin-right: 8px;
  font-size: 14px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-primary);
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  line-height: 1;
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
  letter-spacing: -0.02em;
}
.site-nav {
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: center;
  position: relative;
}
.nav-chips {
  display: flex;
  gap: 4px;
  align-items: center;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav-chips::-webkit-scrollbar {
  display: none;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-chip:hover {
  background: var(--color-soft);
  color: var(--color-primary);
}
.nav-chip.active {
  background: var(--color-primary);
  color: var(--color-accent);
  font-weight: 600;
}
.header-cta {
  flex-shrink: 0;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-weak);
  margin-bottom: 24px;
}
.breadcrumb a {
  transition: color 0.2s ease;
}
.breadcrumb a:hover {
  color: var(--color-primary);
}
.breadcrumb .sep {
  color: #c5c8c3;
}
.breadcrumb .current {
  color: var(--color-primary);
  font-weight: 500;
}

/* ===== Article Page ===== */
.article-main {
  padding-bottom: 64px;
}
.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding-top: 48px;
}
.article-header {
  margin-bottom: 40px;
}
.article-header h1 {
  font-size: 40px;
  line-height: 1.3;
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--color-text-weak);
  margin-bottom: 24px;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.category-chip {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 14px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 500;
}
.article-summary {
  background: var(--color-soft);
  border-radius: var(--radius-btn);
  padding: 20px 24px;
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.8;
  border-left: 4px solid var(--color-accent);
}

/* ===== Article Content ===== */
.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
}
.article-content h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 48px 0 18px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.article-content h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 36px 0 14px;
  line-height: 1.4;
}
.article-content p {
  margin-bottom: 22px;
}
.article-content a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
  transition: border-color 0.2s ease;
}
.article-content a:hover {
  border-color: var(--color-primary);
}
.article-content ul,
.article-content ol {
  margin: 0 0 22px 1.4em;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content blockquote {
  margin: 28px 0;
  padding: 16px 24px;
  border-left: 4px solid var(--color-accent);
  background: var(--color-soft);
  border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
  color: var(--color-text);
  font-size: 15px;
}
.article-content img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-large);
  margin: 28px 0;
}
.article-content code {
  background: var(--color-soft);
  border-radius: 6px;
  padding: 3px 8px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  color: var(--color-primary);
}
.article-content pre {
  background: var(--color-soft);
  border-radius: var(--radius-btn);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 22px;
  line-height: 1.6;
}
.article-content pre code {
  background: none;
  padding: 0;
}

/* ===== Article Extra ===== */
.article-extra {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}
.tag-chip {
  display: inline-flex;
  align-items: center;
  height: 30px;
  padding: 0 16px;
  border-radius: var(--radius-full);
  background: var(--color-soft);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s ease;
}
.tag-chip:hover {
  background: var(--color-primary);
  color: var(--color-accent);
}
.back-category {
  margin-bottom: 28px;
}
.back-category a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: all 0.2s ease;
}
.back-category a:hover {
  color: var(--color-primary);
  gap: 10px;
}
.article-pagination {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding-top: 8px;
}
.pag-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  padding: 18px 20px;
  transition: all 0.2s ease;
  display: block;
}
.pag-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.pag-item:active {
  transform: scale(0.98);
}
.pag-label {
  display: block;
  font-size: 13px;
  color: var(--color-text-weak);
  margin-bottom: 6px;
}
.pag-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.5;
}

/* ===== Related Posts ===== */
.related-posts {
  padding-top: 64px;
  margin-top: 24px;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 32px;
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.section-sub {
  font-size: 14px;
  color: var(--color-text-weak);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: block;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all 0.2s ease;
}
.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
  border-color: var(--color-primary);
}
.related-card:active {
  transform: scale(0.98);
}
.related-card .thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-soft);
}
.related-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.2s ease;
}
.related-card:hover .thumb img {
  transform: scale(1.03);
}
.related-card .info {
  padding: 20px;
}
.related-card .info h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
  line-height: 1.5;
}
.related-card .info .time {
  font-size: 13px;
  color: var(--color-text-weak);
}

/* ===== CTA Section ===== */
.cta-section {
  margin-top: 72px;
  background: var(--color-primary);
  border-radius: var(--radius-large);
  padding: 56px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(201, 242, 75, 0.08);
}
.cta-info {
  position: relative;
  z-index: 1;
}
.cta-title {
  font-size: 32px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.cta-desc {
  color: #B8C4B0;
  font-size: 14px;
  line-height: 1.7;
}
.cta-right {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.cta-qr {
  width: 88px;
  height: 88px;
  background: var(--color-soft);
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-weak);
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.cta-qr:hover {
  border-color: var(--color-accent);
}

/* ===== Not Found ===== */
.not-found-card {
  max-width: 640px;
  margin: 80px auto;
  text-align: center;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 64px 40px;
}
.not-found-card h2 {
  font-size: 28px;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.not-found-card p {
  color: var(--color-text-weak);
  margin-bottom: 28px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-primary);
  color: #ffffff;
  padding-top: 64px;
  margin-top: 96px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}
.footer-brand p {
  color: #B8C4B0;
  font-size: 14px;
  margin-top: 12px;
  line-height: 1.8;
}
.footer-nav h4,
.footer-legal h4 {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
}
.footer-nav a,
.footer-legal a {
  display: block;
  color: #B8C4B0;
  font-size: 14px;
  margin-bottom: 10px;
  transition: color 0.2s ease;
}
.footer-nav a:hover,
.footer-legal a:hover {
  color: var(--color-accent);
}
.footer-legal span {
  display: block;
  color: #8A918D;
  font-size: 13px;
  margin-top: 10px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
}
.footer-bottom p {
  color: #8A918D;
  font-size: 13px;
  text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) and (min-width: 768px) {
  .nav-chip {
    padding: 0 14px;
    font-size: 13px;
  }
  .header-inner {
    gap: 14px;
  }
  .cta-section {
    padding: 44px 32px;
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-right {
    width: 100%;
    justify-content: space-between;
  }
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

@media (max-width: 767px) {
  :root {
    --space-section: 64px;
  }
  body {
    font-size: 15px;
  }
  .header-inner {
    height: auto;
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 0;
  }
  .logo-text {
    font-size: 16px;
  }
  .logo-mark {
    width: 32px;
    height: 32px;
    font-size: 16px;
    border-radius: 8px;
  }
  .header-cta {
    margin-left: auto;
  }
  .btn-download {
    height: 38px;
    padding: 0 16px;
    font-size: 13px;
  }
  .site-nav {
    flex-basis: 100%;
    order: 3;
    justify-content: flex-start;
    margin-top: 2px;
  }
  .site-nav::before,
  .site-nav::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 20px;
    z-index: 2;
    pointer-events: none;
  }
  .site-nav::before {
    left: 0;
    background: linear-gradient(to right, #ffffff, transparent);
  }
  .site-nav::after {
    right: 0;
    background: linear-gradient(to left, #ffffff, transparent);
  }
  .nav-chips {
    width: 100%;
    padding-right: 8px;
  }
  .nav-chip {
    height: 32px;
    padding: 0 16px;
    font-size: 13px;
  }
  .article-body {
    padding-top: 32px;
  }
  .article-header h1 {
    font-size: 28px;
  }
  .article-meta {
    gap: 12px;
    row-gap: 8px;
  }
  .article-summary {
    padding: 16px 18px;
    font-size: 14px;
  }
  .article-content h2 {
    font-size: 24px;
    margin-top: 36px;
  }
  .article-content h3 {
    font-size: 20px;
  }
  .article-pagination {
    grid-template-columns: 1fr;
  }
  .related-posts {
    padding-top: 48px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .section-title {
    font-size: 26px;
  }
  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .cta-section {
    padding: 40px 24px;
    flex-direction: column;
    align-items: flex-start;
    margin-top: 48px;
  }
  .cta-title {
    font-size: 26px;
  }
  .cta-right {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .cta-qr {
    width: 80px;
    height: 80px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 32px;
  }
  .site-footer {
    margin-top: 64px;
    padding-top: 48px;
  }
  .not-found-card {
    margin: 48px auto;
    padding: 48px 24px;
  }
  .not-found-card h2 {
    font-size: 24px;
  }
}

/* roulang page: category2 */
:root {
  --primary: #131614;
  --primary-light: #1f2421;
  --accent: #C9F24B;
  --accent-dark: #A8D93A;
  --bg: #F7F7F4;
  --card-bg: #FFFFFF;
  --text: #555B57;
  --text-light: #8A918D;
  --border: #E6E6E0;
  --success: #1B9C64;
  --warning: #E09B2D;
  --error: #D64545;
  --radius-btn: 12px;
  --radius-card: 16px;
  --radius-lg: 20px;
  --shadow: 0 8px 28px rgba(19,22,20,0.08);
  --transition: 200ms ease;
  --container: 1200px;
  --section-space: 96px;
  --header-h: 72px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
button, input {
  font-family: inherit;
  border: none;
  outline: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #FFF;
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: var(--accent);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
  min-width: 0;
}
.nav-chips {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 4px 0;
}
.nav-chips::-webkit-scrollbar {
  display: none;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 20px;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}
.nav-chip:hover {
  background: #F0F0EC;
  color: var(--primary);
}
.nav-chip.active {
  background: var(--primary);
  color: var(--accent);
}
.header-cta {
  flex-shrink: 0;
}
.btn-download {
  white-space: nowrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: var(--primary);
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-outline {
  background: transparent;
  color: #FFF;
  border: 1px solid rgba(255,255,255,0.6);
}
.btn-outline:hover {
  border-color: #FFF;
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}
.btn-dark {
  background: var(--primary);
  color: #FFF;
}
.btn-dark:hover {
  background: #2a2f2c;
  transform: translateY(-2px);
}
.btn-lg {
  height: 56px;
  padding: 0 36px;
  font-size: 16px;
}
.btn:focus-visible {
  outline: 3px solid rgba(201, 242, 75, 0.5);
  outline-offset: 2px;
}

/* ===== Page Hero (Category) ===== */
.page-hero {
  background: var(--primary);
  padding: 72px 0 56px;
  position: relative;
  overflow: hidden;
}
.page-hero .category-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(201,242,75,0.15);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.page-hero h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.3;
  color: #FFF;
  max-width: 820px;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.page-hero .subtitle {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255,255,255,0.7);
  max-width: 680px;
  margin-bottom: 0;
}
.page-hero-back {
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 100%;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  z-index: 0;
}
.page-hero .container {
  position: relative;
  z-index: 1;
}

/* ===== Section spacing ===== */
.section {
  padding: var(--section-space) 0;
}
.section-tight {
  padding: 56px 0;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.3;
  letter-spacing: -0.3px;
}
.section-head .desc {
  font-size: 14px;
  color: var(--text-light);
  max-width: 480px;
}

/* ===== Steps / Process ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.step-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.step-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  font-family: "Helvetica Neue", system-ui, sans-serif;
  margin-bottom: 16px;
  display: block;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}
.step-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-light);
}

/* ===== Large List ===== */
.list-large {
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.list-item {
  display: flex;
  align-items: center;
  gap: 32px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.list-item:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.list-item .item-index {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  font-family: "Helvetica Neue", system-ui, sans-serif;
  min-width: 48px;
  text-align: center;
  flex-shrink: 0;
}
.list-item .item-body {
  flex: 1;
  min-width: 0;
}
.list-item .item-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
  line-height: 1.4;
}
.list-item .item-body p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 10px;
}
.list-item .item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-light);
}
.list-item .item-meta .tag {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 10px;
  border-radius: 999px;
  background: #F0F0EC;
  color: var(--text);
  font-size: 12px;
  font-weight: 500;
}
.list-item .item-thumb {
  width: 160px;
  height: 120px;
  border-radius: var(--radius-card);
  overflow: hidden;
  flex-shrink: 0;
  background: #F0F0EC;
}
.list-item .item-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.list-item:hover .item-thumb img {
  transform: scale(1.04);
}

/* ===== Notice ===== */
.notice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.notice-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
  display: flex;
  gap: 14px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.notice-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}
.notice-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(201,242,75,0.2);
  color: var(--primary);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.notice-card h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 4px;
}
.notice-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-light);
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 900px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:first-child {
  border-top: 1px solid var(--border);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 0;
  cursor: pointer;
  background: none;
  width: 100%;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  transition: color var(--transition);
}
.faq-q:hover {
  color: var(--primary);
}
.faq-q .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text);
  flex-shrink: 0;
  transition: all var(--transition);
}
.faq-q.open .faq-icon {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--accent);
  transform: rotate(45deg);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-a-inner {
  padding-bottom: 24px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-light);
}

/* ===== CTA ===== */
.cta-section {
  background: var(--primary);
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  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: 0.12;
}
.cta-section .cta-content {
  position: relative;
  z-index: 1;
}
.cta-section h2 {
  font-size: 32px;
  font-weight: 700;
  color: #FFF;
  line-height: 1.3;
  margin-bottom: 8px;
}
.cta-section p {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0;
}
.cta-actions {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}
.qr-placeholder {
  width: 80px;
  height: 80px;
  background: #FFF;
  border-radius: var(--radius-btn);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-light);
  flex-shrink: 0;
}
.qr-placeholder .qr-icon {
  font-size: 22px;
  color: var(--primary);
}
.cta-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 0;
  margin-top: var(--section-space);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: #FFF;
  display: block;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
  max-width: 320px;
}
.footer-nav h4,
.footer-legal h4 {
  font-size: 14px;
  font-weight: 600;
  color: #FFF;
  margin-bottom: 16px;
}
.footer-nav a,
.footer-legal a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-nav a:hover,
.footer-legal a:hover {
  color: var(--accent);
}
.footer-legal span {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,0.35);
  margin-top: 8px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.35);
  text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .notice-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-section {
    flex-direction: column;
    padding: 48px 32px;
    gap: 32px;
    text-align: center;
  }
  .cta-actions {
    flex-direction: column;
    gap: 16px;
  }
  .page-hero {
    padding: 56px 0 40px;
  }
  .page-hero h1 {
    font-size: 36px;
  }
  .page-hero-back {
    width: 60%;
  }
}
@media (max-width: 767px) {
  :root {
    --section-space: 64px;
  }
  body {
    font-size: 15px;
  }
  .container {
    padding: 0 16px;
  }
  .header-inner {
    gap: 10px;
  }
  .logo-text {
    font-size: 16px;
  }
  .nav-chips {
    padding: 2px 0;
  }
  .nav-chip {
    height: 32px;
    padding: 0 14px;
    font-size: 13px;
  }
  .btn-download {
    height: 36px;
    padding: 0 16px;
    font-size: 13px;
    border-radius: 10px;
  }
  .btn-lg {
    height: 48px;
    padding: 0 24px;
    font-size: 15px;
  }
  .page-hero h1 {
    font-size: 28px;
  }
  .page-hero .subtitle {
    font-size: 14px;
  }
  .page-hero-back {
    width: 100%;
    opacity: 0.08;
  }
  .section {
    padding: 56px 0;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 24px;
  }
  .section-head h2 {
    font-size: 28px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .step-card {
    padding: 24px 20px;
  }
  .step-card:hover {
    transform: none;
  }
  .list-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
  }
  .list-item .item-index {
    font-size: 28px;
    min-width: auto;
    text-align: left;
  }
  .list-item .item-thumb {
    width: 100%;
    height: 180px;
  }
  .notice-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .faq-q {
    font-size: 15px;
    padding: 20px 0;
  }
  .cta-section {
    padding: 40px 24px;
    border-radius: 16px;
  }
  .cta-section h2 {
    font-size: 26px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 32px;
  }
  .footer-brand p {
    max-width: 100%;
  }
}
@media (max-width: 520px) {
  .page-hero {
    padding: 48px 0 36px;
  }
  .page-hero h1 {
    font-size: 24px;
  }
  .page-hero .category-tag {
    font-size: 12px;
  }
  .header-cta {
    display: none;
  }
  .header-inner {
    justify-content: flex-start;
  }
  .site-nav {
    flex: 1;
    overflow: hidden;
    position: relative;
  }
  .nav-chips {
    gap: 4px;
    -webkit-mask-image: linear-gradient(to right, transparent 0, #000 20px, #000 calc(100% - 20px), transparent 100%);
    mask-image: linear-gradient(to right, transparent 0, #000 20px, #000 calc(100% - 20px), transparent 100%);
  }
  .nav-chip {
    padding: 0 12px;
  }
  .list-item .item-meta {
    flex-wrap: wrap;
    gap: 8px;
  }
  .cta-section {
    flex-direction: column;
    text-align: center;
  }
  .cta-actions {
    flex-direction: column;
  }
  .qr-placeholder {
    width: 72px;
    height: 72px;
  }
}

/* roulang page: category3 */
:root {
  --primary: #131614;
  --accent: #C9F24B;
  --accent-hover: #A8D93A;
  --bg: #F7F7F4;
  --card-bg: #FFFFFF;
  --text: #555B57;
  --text-light: #8A918D;
  --border: #E6E6E0;
  --success: #1B9C64;
  --warning: #E09B2D;
  --error: #D64545;
  --radius-btn: 12px;
  --radius-card: 16px;
  --radius-large: 20px;
  --shadow-hover: 0 8px 28px rgba(19,22,20,0.08);
  --transition: 200ms ease;
  --container: 1200px;
  --space-section: 96px;
  --space-section-mobile: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

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

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

.section-header {
  margin-bottom: 48px;
}

.section-header .section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 40px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

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

.section-header .header-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  transition: var(--transition);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: var(--primary);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.6);
  color: #fff;
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}

.btn-dark-outline {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--primary);
}

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

.btn-sm {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

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

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: var(--accent);
  font-size: 18px;
  font-weight: 700;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.01em;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
  min-width: 0;
  overflow: hidden;
}

.nav-chips {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 0 8px;
}

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

.nav-chip {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  white-space: nowrap;
  transition: var(--transition);
}

.nav-chip:hover {
  background: var(--bg);
  color: var(--primary);
}

.nav-chip.active {
  background: var(--primary);
  color: var(--accent);
}

.header-cta {
  flex-shrink: 0;
}

.btn-download {
  height: 42px;
  padding: 0 22px;
  font-size: 14px;
}

/* Page hero */
.page-hero {
  background: var(--primary);
  position: relative;
  overflow: hidden;
  padding: 88px 0 72px;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center 30%;
  opacity: 0.18;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(19,22,20,0.96) 0%, rgba(19,22,20,0.82) 55%, rgba(19,22,20,0.62) 100%);
}

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

.hero-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(201,242,75,0.12);
  border: 1px solid rgba(201,242,75,0.3);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.page-hero h1 {
  font-size: 56px;
  line-height: 1.25;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  max-width: 760px;
  margin-bottom: 20px;
}

.page-hero .hero-desc {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255,255,255,0.82);
  max-width: 620px;
  margin-bottom: 32px;
}

.page-hero .hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Feature list */
.feature-list {
  display: flex;
  flex-direction: column;
}

.feature-item {
  display: grid;
  grid-template-columns: 72px 1fr 280px;
  gap: 32px;
  align-items: center;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.feature-item:first-of-type {
  padding-top: 0;
}

.feature-item:last-child {
  border-bottom: none;
}

.feature-item .feature-num {
  font-size: 44px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  -webkit-text-stroke: 1px var(--primary);
  letter-spacing: -0.02em;
}

.feature-item .feature-body h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-item .feature-body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  max-width: 560px;
}

.feature-item .feature-body .feature-tags {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.feature-item .feature-img {
  width: 280px;
  height: 180px;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(19,22,20,0.06);
  box-shadow: 0 4px 16px rgba(19,22,20,0.05);
}

.feature-item .feature-img img {
  width: 100%;
  height: 100%;
  transition: transform 0.5s ease;
}

.feature-item:hover .feature-img img {
  transform: scale(1.04);
}

.chip {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.chip-accent {
  background: rgba(201,242,75,0.18);
  color: #39421a;
  border-color: var(--accent);
}

/* Scenarios */
.scenario-section {
  background: #F0F0EC;
  border-radius: var(--radius-large);
  padding: 72px 0;
  margin: 0 20px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 44px;
}

.scenario-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  padding: 32px 28px;
  transition: var(--transition);
}

.scenario-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.scenario-card .scenario-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
}

.scenario-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}

.scenario-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}

/* Steps */
.steps-section {
  position: relative;
}

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

.step-item {
  position: relative;
  padding: 28px 20px 24px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: var(--transition);
}

.step-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
}

.step-item .step-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #39421a;
  background: rgba(201,242,75,0.3);
  padding: 2px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

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

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

/* FAQ */
.faq-section {
  max-width: 860px;
  margin: 0 auto;
}

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

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 4px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  transition: color var(--transition);
  background: none;
  text-align: left;
  width: 100%;
  font-family: inherit;
}

.faq-question:hover {
  color: #39421a;
}

.faq-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text);
  transition: var(--transition);
  flex-shrink: 0;
  font-style: normal;
  user-select: none;
}

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

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

.faq-answer-inner {
  padding: 0 4px 26px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
  max-width: 720px;
}

.faq-answer-inner a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Gradient text */
.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #A8D93A 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* CTA */
.cta-section {
  background: var(--primary);
  border-radius: var(--radius-large);
  padding: 72px 64px;
  position: relative;
  overflow: hidden;
  margin: 0 20px;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
}

.cta-section .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-left h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  line-height: 1.4;
}

.cta-left p {
  color: rgba(255,255,255,0.7);
  font-size: 15px;
}

.cta-right {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.cta-qr {
  width: 80px;
  height: 80px;
  background: #fff;
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-light);
  text-align: center;
  padding: 8px;
  border: 2px solid var(--border);
}

/* Footer */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  margin-top: var(--space-section);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 48px;
  padding: 64px 20px 48px;
}

.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  display: block;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255,255,255,0.55);
  max-width: 280px;
}

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

.footer-nav a,
.footer-legal a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  padding: 6px 0;
  transition: var(--transition);
}

.footer-nav a:hover,
.footer-legal a:hover {
  color: var(--accent);
}

.footer-legal span {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  padding-top: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.35);
  text-align: center;
}

/* Mobile nav fade */
.mobile-nav-fade {
  display: none;
}

/* Responsive */
@media (max-width: 1024px) {
  .feature-item {
    grid-template-columns: 56px 1fr 220px;
    gap: 24px;
  }

  .feature-item .feature-img {
    width: 220px;
    height: 150px;
  }

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

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

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

  .section-header h2 {
    font-size: 28px;
  }

  .page-hero {
    padding: 64px 0 48px;
  }

  .page-hero h1 {
    font-size: 32px;
  }

  .page-hero .hero-desc {
    font-size: 16px;
  }

  .header-inner {
    height: 64px;
  }

  .site-nav {
    order: 3;
    width: 100%;
    position: relative;
    background: #fff;
    border-top: 1px solid var(--border);
  }

  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding-bottom: 10px;
    gap: 8px;
  }

  .site-nav {
    flex-basis: 100%;
    max-width: calc(100% + 40px);
    margin: 0 -20px;
    padding: 8px 0;
  }

  .nav-chips {
    padding: 0 20px;
  }

  .header-cta {
    display: none;
  }

  .feature-item {
    grid-template-columns: 48px 1fr;
    gap: 20px;
    padding: 32px 0;
  }

  .feature-item .feature-img {
    grid-column: 1 / -1;
    width: 100%;
    height: 200px;
  }

  .feature-item .feature-num {
    font-size: 36px;
  }

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

  .steps-wrap {
    grid-template-columns: 1fr;
  }

  .cta-section {
    padding: 48px 24px;
    margin: 0;
    border-radius: 20px;
  }

  .cta-section .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 48px 20px 32px;
  }
}

@media (max-width: 520px) {
  .btn {
    height: 48px;
    padding: 0 20px;
    font-size: 15px;
  }

  .page-hero .hero-actions {
    width: 100%;
  }

  .page-hero .hero-actions .btn {
    flex: 1;
    min-width: 0;
  }

  .feature-item .feature-body h3 {
    font-size: 20px;
  }

  .faq-question {
    font-size: 15px;
    padding: 20px 4px;
  }

  .scenario-card {
    padding: 24px 20px;
  }

  .logo-text {
    font-size: 17px;
  }

  .nav-chip {
    padding: 0 16px;
    font-size: 13px;
  }
}

/* roulang page: category4 */
:root{
  --primary:#131614;
  --accent:#C9F24B;
  --accent-dark:#A8D93A;
  --bg:#F7F7F4;
  --card:#FFFFFF;
  --text:#555B57;
  --muted:#8A918D;
  --border:#E6E6E0;
  --success:#1B9C64;
  --warning:#E09B2D;
  --error:#D64545;
  --gray-block:#F0F0EC;
  --radius-sm:12px;
  --radius-md:16px;
  --radius-lg:20px;
  --shadow:0 8px 28px rgba(19,22,20,0.08);
  --transition:200ms ease;
  --container:1200px;
}
*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}
html{
  scroll-behavior:smooth;
}
body{
  font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.8;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{
  max-width:100%;
  display:block;
  object-fit:cover;
}
a{
  color:inherit;
  text-decoration:none;
  transition:color var(--transition);
}
button{
  font-family:inherit;
  cursor:pointer;
  border:none;
  background:none;
}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--card);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:72px;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:40px;
  height:40px;
  border-radius:12px;
  background:var(--primary);
  color:var(--accent);
  font-size:20px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
}
.logo-text{
  font-size:20px;
  font-weight:700;
  color:var(--primary);
  letter-spacing:-0.01em;
  white-space:nowrap;
}
.site-nav{
  flex:1;
  display:flex;
  justify-content:center;
  overflow:hidden;
}
.nav-chips{
  display:flex;
  align-items:center;
  gap:6px;
  overflow-x:auto;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
  padding:0 4px;
}
.nav-chips::-webkit-scrollbar{
  display:none;
}
.nav-chip{
  height:36px;
  padding:0 20px;
  border-radius:999px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  font-weight:600;
  color:var(--muted);
  background:transparent;
  white-space:nowrap;
  transition:background var(--transition),color var(--transition),box-shadow var(--transition);
}
.nav-chip:hover{
  background:#F0F0EC;
  color:var(--primary);
}
.nav-chip.active{
  background:var(--primary);
  color:var(--accent);
}
.header-cta{
  flex-shrink:0;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 28px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  transition:transform var(--transition),background var(--transition),color var(--transition),border-color var(--transition),box-shadow var(--transition);
  white-space:nowrap;
}
.btn:active{
  transform:scale(0.98);
}
.btn-primary{
  background:var(--accent);
  color:var(--primary);
}
.btn-primary:hover{
  background:var(--accent-dark);
  transform:translateY(-2px);
  box-shadow:var(--shadow);
}
.btn-outline{
  background:transparent;
  border:1px solid var(--border);
  color:var(--primary);
}
.btn-outline:hover{
  border-color:var(--primary);
  transform:translateY(-2px);
}
.btn-white-outline{
  background:transparent;
  border:1px solid rgba(255,255,255,0.6);
  color:#fff;
}
.btn-white-outline:hover{
  border-color:#fff;
  background:rgba(255,255,255,0.08);
  transform:translateY(-2px);
}
.btn-download{
  background:var(--accent);
  color:var(--primary);
}
.btn-download:hover{
  background:var(--accent-dark);
  transform:translateY(-2px);
  box-shadow:var(--shadow);
}
.hero{
  background:var(--primary);
  padding:96px 0 80px;
  position:relative;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  opacity:0.22;
  z-index:1;
}
.hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  align-items:center;
  gap:64px;
}
.hero-copy{
  max-width:640px;
}
.hero-label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:32px;
  padding:0 14px;
  background:rgba(201,242,75,0.12);
  border:1px solid rgba(201,242,75,0.3);
  color:var(--accent);
  font-size:13px;
  font-weight:600;
  border-radius:999px;
  margin-bottom:24px;
  letter-spacing:0.02em;
}
.hero h1{
  font-size:56px;
  line-height:1.3;
  font-weight:700;
  color:#fff;
  letter-spacing:-0.02em;
  margin-bottom:24px;
}
.hero-sub{
  font-size:16px;
  line-height:1.8;
  color:rgba(255,255,255,0.78);
  max-width:520px;
  margin-bottom:40px;
}
.hero-actions{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}
.hero-visual{
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:0 24px 64px rgba(0,0,0,0.35);
  line-height:0;
  border:1px solid rgba(255,255,255,0.1);
}
.hero-visual img{
  width:100%;
  height:420px;
  object-fit:cover;
}
.stats-strip{
  background:var(--card);
  border-bottom:1px solid var(--border);
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
  padding:40px 0;
}
.stat-item{
  text-align:left;
}
.stat-num{
  font-size:32px;
  font-weight:700;
  color:var(--primary);
  line-height:1.2;
  letter-spacing:-0.02em;
}
.stat-num em{
  font-style:normal;
  color:var(--accent);
}
.stat-label{
  font-size:13px;
  color:var(--muted);
  margin-top:6px;
  line-height:1.6;
}
.page-header{
  padding:56px 0 8px;
}
.page-meta-tag{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 12px;
  background:#F0F0EC;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  color:var(--muted);
  margin-bottom:20px;
}
.page-header h1{
  font-size:40px;
  line-height:1.3;
  font-weight:700;
  color:var(--primary);
  letter-spacing:-0.02em;
  margin-bottom:16px;
}
.page-header .lead{
  font-size:16px;
  line-height:1.8;
  color:var(--muted);
  max-width:760px;
}
.section-block{
  padding:64px 0;
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:48px;
}
.section-head h2{
  font-size:40px;
  line-height:1.3;
  font-weight:700;
  color:var(--primary);
  letter-spacing:-0.02em;
}
.section-desc{
  font-size:15px;
  color:var(--muted);
  max-width:480px;
  line-height:1.8;
}
.step-list{
  display:flex;
  flex-direction:column;
  gap:40px;
}
.step-card{
  display:grid;
  grid-template-columns:80px 1fr 280px;
  align-items:center;
  gap:40px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:32px;
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
}
.step-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow);
  border-color:var(--primary);
}
.step-index{
  font-size:32px;
  font-weight:700;
  color:var(--accent);
  letter-spacing:-0.02em;
  line-height:1;
}
.step-info h3{
  font-size:24px;
  font-weight:700;
  color:var(--primary);
  line-height:1.4;
  margin-bottom:12px;
}
.step-info p{
  font-size:15px;
  line-height:1.8;
  color:var(--text);
}
.step-thumb{
  border-radius:var(--radius-sm);
  overflow:hidden;
  height:150px;
  line-height:0;
  border:1px solid rgba(19,22,20,0.06);
}
.step-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 200ms ease;
}
.step-card:hover .step-thumb img{
  transform:scale(1.04);
}
.requirements{
  background:var(--card);
  border-radius:var(--radius-md);
  border:1px solid var(--border);
  padding:40px;
}
.requirements .section-head{
  margin-bottom:32px;
}
.req-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:28px 0;
  border-bottom:1px solid var(--border);
}
.req-row:last-child{
  border-bottom:none;
  padding-bottom:0;
}
.req-left{
  display:flex;
  align-items:center;
  gap:16px;
  flex-shrink:0;
}
.req-platform{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:44px;
  padding:0 20px;
  border-radius:var(--radius-sm);
  background:var(--primary);
  color:var(--accent);
  font-size:16px;
  font-weight:700;
}
.req-version{
  font-size:24px;
  font-weight:700;
  color:var(--primary);
  white-space:nowrap;
}
.req-desc{
  text-align:right;
  font-size:14px;
  color:var(--muted);
  line-height:1.8;
}
.faq-block{
  padding:64px 0;
}
.faq-list{
  max-width:840px;
  margin:0 auto;
}
.faq-item{
  border-bottom:1px solid var(--border);
}
.faq-question{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:24px 0;
  font-size:17px;
  font-weight:600;
  color:var(--primary);
  cursor:pointer;
  text-align:left;
  width:100%;
  background:none;
  transition:color var(--transition);
}
.faq-question:hover{
  color:var(--muted);
}
.faq-icon{
  width:20px;
  height:20px;
  border-radius:50%;
  border:2px solid var(--border);
  position:relative;
  flex-shrink:0;
  transition:transform var(--transition),border-color var(--transition);
}
.faq-icon::before,
.faq-icon::after{
  content:'';
  position:absolute;
  background:var(--primary);
  border-radius:2px;
  transition:background var(--transition);
}
.faq-icon::before{
  width:10px;
  height:2px;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
}
.faq-icon::after{
  width:2px;
  height:10px;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
  transition:opacity var(--transition);
}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height 200ms ease,padding 200ms ease;
  padding-left:0;
}
.faq-answer-inner{
  padding-bottom:24px;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
}
.faq-item input{
  display:none;
}
.faq-item input:checked + .faq-question .faq-icon{
  transform:rotate(45deg);
  border-color:var(--accent);
}
.faq-item input:checked ~ .faq-answer{
  max-height:400px;
  padding-left:1px;
}
.cta-block{
  background:var(--primary);
  padding:72px 0;
  position:relative;
  overflow:hidden;
}
.cta-block .container{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:48px;
}
.cta-title{
  font-size:40px;
  font-weight:700;
  color:#fff;
  line-height:1.3;
  letter-spacing:-0.02em;
  margin-bottom:12px;
}
.cta-sub{
  font-size:15px;
  color:rgba(255,255,255,0.7);
  line-height:1.8;
}
.cta-tools{
  display:flex;
  align-items:center;
  gap:24px;
  flex-shrink:0;
}
.qr-placeholder{
  width:96px;
  height:96px;
  background:rgba(255,255,255,0.1);
  border:1px dashed rgba(255,255,255,0.35);
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  color:rgba(255,255,255,0.5);
  text-align:center;
  line-height:1.5;
}
.app-meta{
  font-size:13px;
  color:rgba(255,255,255,0.6);
  line-height:1.8;
  margin-top:10px;
}
.site-footer{
  background:var(--primary);
  color:rgba(255,255,255,0.7);
  padding-top:64px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand .footer-logo{
  font-size:24px;
  font-weight:700;
  color:#fff;
  letter-spacing:-0.01em;
  display:block;
  margin-bottom:16px;
}
.footer-brand p{
  line-height:1.8;
  color:rgba(255,255,255,0.6);
  max-width:360px;
}
.footer-nav h4,
.footer-legal h4{
  font-size:14px;
  font-weight:600;
  color:rgba(255,255,255,0.5);
  letter-spacing:0.04em;
  margin-bottom:16px;
  text-transform:uppercase;
}
.footer-nav a,
.footer-legal a{
  display:block;
  padding:5px 0;
  color:rgba(255,255,255,0.72);
  transition:color var(--transition),padding-left var(--transition);
}
.footer-nav a:hover,
.footer-legal a:hover{
  color:var(--accent);
  padding-left:4px;
}
.footer-legal span{
  display:block;
  padding-top:5px;
  color:rgba(255,255,255,0.45);
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.1);
  padding:24px 0;
  font-size:13px;
  color:rgba(255,255,255,0.45);
}
.footer-bottom .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
}
@media(max-width:1024px){
  .hero{
    padding:72px 0 64px;
  }
  .hero-inner{
    grid-template-columns:1fr;
    gap:40px;
  }
  .hero-sub{
    max-width:100%;
  }
  .hero-visual{
    max-width:680px;
  }
  .step-card{
    grid-template-columns:60px 1fr 220px;
    gap:24px;
    padding:24px;
  }
  .req-row{
    align-items:flex-start;
  }
  .cta-block .container{
    flex-direction:column;
    align-items:flex-start;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
}
@media(max-width:768px){
  .header-inner{
    height:auto;
    flex-wrap:wrap;
    padding-top:12px;
    padding-bottom:12px;
    gap:12px;
  }
  .logo{
    order:1;
  }
  .header-cta{
    order:2;
  }
  .site-nav{
    order:3;
    width:100%;
    justify-content:flex-start;
    -webkit-mask-image:linear-gradient(to right,transparent 0,#000 20px,#000 calc(100% - 20px),transparent 100%);
    mask-image:linear-gradient(to right,transparent 0,#000 20px,#000 calc(100% - 20px),transparent 100%);
  }
  .nav-chips{
    width:100%;
    padding:4px 0;
    gap:4px;
  }
  .nav-chip{
    padding:0 16px;
    font-size:13px;
  }
  .hero h1{
    font-size:32px;
  }
  .hero-visual img{
    height:260px;
  }
  .stats-grid{
    grid-template-columns:repeat(2,1fr);
    gap:24px;
  }
  .page-header h1{
    font-size:28px;
  }
  .section-head{
    flex-direction:column;
    align-items:flex-start;
    gap:12px;
  }
  .section-head h2{
    font-size:28px;
  }
  .step-card{
    grid-template-columns:1fr;
    gap:16px;
    padding:20px;
  }
  .step-index{
    font-size:28px;
  }
  .step-thumb{
    height:180px;
  }
  .req-row{
    flex-direction:column;
    gap:12px;
  }
  .req-desc{
    text-align:left;
  }
  .cta-title{
    font-size:28px;
  }
  .cta-tools{
    flex-wrap:wrap;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:32px;
  }
  .footer-bottom .container{
    flex-direction:column;
    align-items:flex-start;
  }
}
@media(max-width:520px){
  .hero{
    padding:56px 0 48px;
  }
  .hero-actions{
    flex-direction:column;
    align-items:stretch;
  }
  .hero-actions .btn{
    width:100%;
  }
  .stats-grid{
    grid-template-columns:1fr 1fr;
    gap:20px;
  }
  .stat-num{
    font-size:28px;
  }
  .page-header{
    padding-top:40px;
  }
  .section-block{
    padding:48px 0;
  }
  .faq-block{
    padding:48px 0;
  }
  .cta-block{
    padding:56px 0;
  }
  .cta-tools{
    flex-direction:column;
    align-items:flex-start;
  }
  .btn{
    height:48px;
    padding:0 20px;
  }
}