/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --ink: #141A17;
  --primary: #00C896;
  --primary-dark: #00B282;
  --bg: #FAFBF9;
  --card: #FFFFFF;
  --border: #E2E7E4;
  --text: #232A27;
  --muted: #6B7572;
  --amber: #FFB224;
  --white: #FFFFFF;
  --dark-text: #EAF0EC;
  --dark-muted: #B7C2BC;
  --dark-line: #2B3430;
  --radius-btn: 8px;
  --radius-card: 12px;
  --radius-lg: 16px;
  --radius-pill: 100px;
  --shadow: 0 4px 20px rgba(16,24,20,.04);
  --shadow-hover: 0 8px 30px rgba(16,24,20,.08);
  --font: "HarmonyOS Sans", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
  list-style: none;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  transition: all var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
  color: var(--white);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-secondary {
  background-color: var(--white);
  color: var(--ink);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(1px);
}

.btn-outline-light {
  background-color: transparent;
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.3);
}

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

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

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

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.brand-mark {
  flex-shrink: 0;
}

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

.main-nav .nav-link {
  position: relative;
  font-size: 14px;
  color: #56605B;
  padding: 8px 2px;
  line-height: 1.4;
}

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

.main-nav .nav-link.active {
  color: var(--ink);
  font-weight: 500;
}

.main-nav .nav-link.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 12px;
  height: 2px;
  background-color: var(--primary);
  border-radius: var(--radius-pill);
}

.nav-cta {
  height: 36px;
  padding: 0 20px;
  margin-left: 8px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  background-color: var(--bg);
  padding: 88px 0 96px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background-image: url("/assets/images/backpic/back-1.png");
  background-size: cover;
  background-position: center;
  opacity: 0.08;
  pointer-events: none;
}

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

.hero-copy {
  flex: 1 1 46%;
  max-width: 560px;
}

.hero-copy h1 {
  font-size: 34px;
  line-height: 1.4;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}

.hero-copy .hero-sub {
  font-size: 16px;
  line-height: 1.8;
  color: #4A5650;
  margin-bottom: 32px;
  max-width: 440px;
}

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

.hero-visual {
  flex: 1 1 54%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  background-color: var(--card);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 380px;
}

/* ===== Features ===== */
.features {
  padding: 96px 0;
  background-color: var(--card);
  border-top: 1px solid var(--border);
}

.features-inner {
  display: flex;
  gap: 72px;
  align-items: center;
}

.features-list {
  flex: 1 1 60%;
}

.features-visual {
  flex: 1 1 40%;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.feature-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  column-gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid #EFF2F0;
}

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

.feature-num {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  font-family: "Inter", var(--font);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-num::after {
  content: "";
  width: 18px;
  height: 2px;
  background-color: var(--primary);
  border-radius: 2px;
}

.feature-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.feature-content p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 520px;
}

/* ===== Carousel / Screenshots ===== */
.screenshots {
  padding: 96px 0;
  background-color: var(--bg);
}

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

.section-head .section-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}

.section-head .section-sub {
  font-size: 14px;
  color: var(--muted);
  max-width: 440px;
}

.carousel {
  position: relative;
}

.carousel-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 16px;
  scrollbar-width: none;
}

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

.carousel-card {
  flex: 0 0 300px;
  scroll-snap-align: start;
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.carousel-cover {
  aspect-ratio: 16 / 10;
  background-color: #EDF1EE;
  overflow: hidden;
}

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

.carousel-card:hover .carousel-cover img {
  transform: scale(1.03);
}

.carousel-label {
  padding: 14px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

.carousel-nav {
  display: none;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.carousel-dots .dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-pill);
  background-color: #C6CFCA;
  transition: all 0.2s ease;
}

.carousel-dots .dot.active {
  width: 22px;
  background-color: var(--primary);
}

/* ===== System Requirements ===== */
.system-requirements {
  padding: 96px 0;
  background-color: var(--bg);
}

.system-box {
  background-color: var(--ink);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  display: flex;
  gap: 64px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.sys-copy {
  flex: 0 0 44%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.sys-copy h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--dark-text);
  line-height: 1.4;
  margin-bottom: 16px;
}

.sys-copy p {
  font-size: 15px;
  color: var(--dark-muted);
  line-height: 1.8;
  margin-bottom: 28px;
}

.sys-list {
  flex: 1 1 56%;
  display: flex;
  flex-direction: column;
}

.sys-group {
  padding: 20px 0;
  border-bottom: 1px solid var(--dark-line);
}

.sys-group:first-child {
  padding-top: 0;
}

.sys-group:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sys-group h5 {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.sys-group p {
  font-size: 15px;
  color: var(--dark-muted);
  line-height: 1.7;
}

/* ===== Testimonials ===== */
.testimonials {
  padding: 96px 0;
  background-color: var(--card);
  border-top: 1px solid var(--border);
}

.testimonials-head {
  text-align: center;
  margin-bottom: 56px;
}

.testimonials-head h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.testimonials-head p {
  font-size: 14px;
  color: var(--muted);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.testimonial-grid .col-right {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.testimonial-grid .col-left {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.testimonial-card {
  background-color: var(--card);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.testimonial-quote {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 12px;
}

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

.testimonial-person {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #E2E7E4;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
}

.testimonial-info .name {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.3;
}

.testimonial-info .role {
  font-size: 12px;
  color: var(--muted);
}

.testimonial-stars {
  margin-left: auto;
  display: flex;
  gap: 2px;
  color: var(--amber);
  font-size: 12px;
}

.testimonial-stars .star {
  color: var(--amber);
}

.testimonial-stars .star.off {
  color: rgba(0,0,0,0.12);
}

/* ===== Download CTA ===== */
.download-cta {
  padding: 96px 0;
  background-color: var(--bg);
}

.download-box {
  background-color: var(--ink);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.download-box h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  line-height: 1.4;
  margin-bottom: 16px;
}

.version-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  background-color: var(--amber);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 28px;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.download-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.download-size {
  font-size: 12px;
  color: var(--dark-muted);
  line-height: 1.4;
  min-height: 18px;
}

/* ===== Posts / CMS ===== */
.posts {
  padding: 96px 0 112px;
  background-color: var(--card);
  border-top: 1px solid var(--border);
}

.posts-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}

.posts-head h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
}

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

.post-card {
  display: flex;
  flex-direction: column;
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.post-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  background-color: #EDF1EE;
  overflow: hidden;
}

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

.post-card:hover .post-cover img {
  transform: scale(1.03);
}

.cover-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--muted);
  background-color: #EDF1EE;
}

.post-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.post-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.post-cat {
  display: inline-flex;
  align-items: center;
  height: 20px;
  padding: 0 10px;
  font-size: 12px;
  color: var(--primary-dark);
  background-color: rgba(0,200,150,0.1);
  border-radius: var(--radius-pill);
}

.post-date {
  font-size: 12px;
  color: var(--muted);
}

.post-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.post-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary-dark);
}

.post-more::after {
  content: "→";
  transition: transform 0.2s ease;
}

.post-card:hover .post-more::after {
  transform: translateX(4px);
}

.empty-state {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 120px;
  border: 1px dashed #C6CFCA;
  border-radius: var(--radius-card);
  font-size: 14px;
  color: var(--muted);
  background-color: var(--bg);
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--bg);
  border-top: 1px solid var(--border);
  padding-top: 48px;
  padding-bottom: 24px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-brand {
  flex: 1 1 260px;
}

.footer-brand .brand {
  margin-bottom: 12px;
}

.footer-brand .footer-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 240px;
}

.footer-links {
  display: flex;
  gap: 56px;
}

.footer-col h6 {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text);
  padding: 4px 0;
  line-height: 1.6;
}

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

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

/* ===== Back to top ===== */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  background-color: var(--ink);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s ease;
}

.back-to-top.show {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-inner {
    flex-direction: column;
    gap: 40px;
  }

  .hero-copy {
    max-width: 100%;
    flex: 1 1 100%;
  }

  .hero-visual {
    flex: 1 1 100%;
    width: 100%;
  }

  .features-inner {
    flex-direction: column;
    gap: 48px;
  }

  .features-list {
    flex: 1 1 100%;
  }

  .features-visual {
    flex: 1 1 100%;
    width: 100%;
  }

  .system-box {
    flex-direction: column;
    gap: 40px;
    padding: 40px 32px;
  }

  .sys-copy {
    flex: 1 1 100%;
  }

  .sys-list {
    flex: 1 1 100%;
  }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--bg);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 24px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 20px 40px rgba(16,24,20,0.08);
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .main-nav .nav-link {
    font-size: 20px;
    line-height: 2;
    width: 100%;
    border-bottom: 1px solid #EFF2F0;
  }

  .main-nav .nav-link.active::after {
    left: 0;
    transform: none;
    width: 12px;
    height: 4px;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
    border-radius: 2px;
  }

  .main-nav .nav-cta {
    margin: 20px 0 0;
    width: 100%;
    height: 44px;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 64px 0 72px;
  }

  .hero-copy h1 {
    font-size: 28px;
  }

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

  .hero-visual img {
    min-height: 240px;
  }

  .features,
  .screenshots,
  .system-requirements,
  .testimonials,
  .download-cta,
  .posts {
    padding: 64px 0;
  }

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

  .testimonial-grid .col-right {
    margin-top: 0;
  }

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

  .footer-top {
    flex-direction: column;
    gap: 32px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 32px 48px;
  }

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

@media (max-width: 576px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-copy h1 {
    font-size: 24px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
    height: 44px;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .carousel-card {
    flex-basis: 240px;
  }

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

  .download-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .download-item .btn {
    width: 100%;
    height: 44px;
  }

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

  .footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .back-to-top {
    bottom: 16px;
    right: 16px;
  }
}

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

/* roulang page: category1 */
:root{
  --ink:#141A17;
  --accent:#00C896;
  --accent-dark:#00B282;
  --bg:#FAFBF9;
  --card:#FFFFFF;
  --border:#E2E7E4;
  --text:#232A27;
  --muted:#6B7572;
  --amber:#FFB224;
  --error:#D15449;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --shadow:0 4px 20px rgba(16,24,20,.04);
  --shadow-hover:0 8px 30px rgba(16,24,20,.08);
  --font:"HarmonyOS Sans","PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font);
  font-size:15px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
ul,ol,li{list-style:none;}
.container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
.btn{
  height:40px;padding:0 24px;border-radius:var(--r-sm);
  font-size:14px;font-weight:500;line-height:1;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;transition:all .2s ease;
  text-decoration:none;white-space:nowrap;
}
.btn:focus-visible,.nav-link:focus-visible,.nav-toggle:focus-visible,.faq-question:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-outline{background:#fff;border-color:var(--border);color:var(--ink);}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px);}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:#EDF1EE;transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.35);color:#fff;}
.btn-ghost:hover{border-color:#fff;color:#fff;transform:translateY(-1px);}
.btn-lg{height:44px;padding:0 30px;font-size:15px;}

/* Header */
.site-header{
  background:var(--bg);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:100;
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;gap:24px;
}
.brand{
  display:inline-flex;align-items:center;gap:9px;
  font-size:17px;font-weight:600;color:var(--ink);
}
.brand-mark{flex-shrink:0;}
.main-nav{
  display:flex;align-items:center;gap:28px;
}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  font-size:14px;color:#56605B;padding:10px 0;
  transition:color .2s ease;
}
.nav-link:hover{color:var(--accent);}
.nav-link.active{color:var(--ink);font-weight:500;}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:2px;
  transform:translateX(-50%);
  width:12px;height:2px;border-radius:2px;
  background:var(--accent);
}
.nav-cta{height:36px;padding:0 18px;font-size:14px;border-radius:var(--r-sm);}
.nav-toggle{
  display:none;background:none;border:none;
  width:42px;height:42px;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;
}
.nav-toggle span{
  display:block;width:22px;height:2px;border-radius:2px;
  background:var(--ink);transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle.open span:first-child{transform:translateY(4px) rotate(45deg);}
.nav-toggle.open span:last-child{transform:translateY(-4px) rotate(-45deg);}

/* Hero */
.hero{padding:80px 0 88px;background:var(--bg);}
.hero-inner{
  display:grid;grid-template-columns:46% 54%;gap:56px;align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;height:24px;
  padding:0 12px;border-radius:100px;
  background:rgba(0,200,150,.1);color:var(--accent);
  font-size:12px;font-weight:600;letter-spacing:.2px;
  margin-bottom:20px;
}
.hero h1{
  font-size:34px;line-height:1.4;font-weight:600;
  color:var(--ink);letter-spacing:-.3px;
}
.hero-sub{
  margin-top:16px;font-size:16px;line-height:1.8;
  color:#4A5650;max-width:440px;
}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap;}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:12px 24px;
  margin-top:36px;font-size:13px;color:var(--muted);
}
.hero-meta li{position:relative;padding-left:18px;}
.hero-meta li::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--accent);
}
.hero-visual img{
  width:100%;height:auto;border-radius:var(--r-lg);
  box-shadow:var(--shadow);
}

/* Intro */
.intro{padding:76px 0;border-top:1px solid var(--border);}
.intro-grid{max-width:900px;margin:0 auto;text-align:center;}
.intro-grid h2{font-size:22px;font-weight:600;color:var(--ink);margin-bottom:16px;}
.intro-grid p{font-size:15px;line-height:1.8;color:var(--muted);}

/* Features */
.features{padding:76px 0;background:var(--card);border-top:1px solid var(--border);}
.features-grid{
  display:grid;grid-template-columns:1fr .85fr;gap:64px;align-items:center;
}
.features-list h2{font-size:22px;font-weight:600;color:var(--ink);margin-bottom:12px;}
.feature-row{
  display:flex;gap:20px;padding:26px 0;
  border-bottom:1px solid var(--border);
}
.feature-row:last-child{border-bottom:none;padding-bottom:0;}
.feature-num{
  font-size:18px;font-weight:700;color:var(--accent);
  line-height:1.6;min-width:36px;
}
.feature-row h3{font-size:17px;font-weight:600;color:var(--text);margin-bottom:6px;}
.feature-row p{font-size:14px;line-height:1.7;color:var(--muted);}
.features-visual img{
  width:100%;height:auto;border-radius:var(--r-lg);
  box-shadow:var(--shadow);
}

/* Platform */
.platform{padding:76px 0;}
.platform-panel{
  background:var(--ink);border-radius:var(--r-lg);
  padding:56px 48px;
  display:grid;grid-template-columns:42% 58%;gap:56px;
  color:#EAF0EC;
}
.platform-copy h2{
  font-size:22px;font-weight:600;color:#fff;margin-bottom:16px;
}
.platform-copy p{color:#B7C2BC;line-height:1.7;font-size:15px;margin-bottom:28px;}
.platform-list{display:flex;flex-direction:column;}
.platform-item{
  padding:22px 0;border-bottom:1px solid #2B3430;
}
.platform-item:first-child{padding-top:0;}
.platform-item:last-child{border-bottom:none;padding-bottom:0;}
.platform-item h3{
  font-size:14px;font-weight:600;color:var(--accent);
  margin-bottom:6px;letter-spacing:.3px;
}
.platform-item p{font-size:15px;color:#B7C2BC;line-height:1.7;}

/* Scenarios */
.scenarios{
  padding:76px 0;background:var(--card);
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.section-head{max-width:680px;margin-bottom:40px;}
.section-head h2{font-size:22px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.section-head p{font-size:15px;color:var(--muted);}
.card-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.scenario-card{
  background:#fff;border:1px solid var(--border);
  border-radius:var(--r-md);overflow:hidden;
  transition:box-shadow .25s ease,transform .25s ease;
}
.scenario-card:hover{
  box-shadow:var(--shadow-hover);transform:translateY(-3px);
}
.scenario-cover{aspect-ratio:16/9;overflow:hidden;background:#EDF1EE;}
.scenario-cover img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .35s ease;
}
.scenario-card:hover .scenario-cover img{transform:scale(1.03);}
.scenario-content{padding:16px 16px 20px;}
.scenario-meta{
  display:flex;justify-content:space-between;align-items:center;
  margin-bottom:8px;
}
.scenario-tag{
  display:inline-flex;align-items:center;height:20px;
  padding:0 10px;border-radius:100px;
  background:rgba(0,200,150,.1);color:var(--accent);
  font-size:12px;font-weight:500;
}
.scenario-meta time{font-size:12px;color:#A0A9A5;}
.scenario-content h3{
  font-size:16px;font-weight:600;line-height:1.5;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;margin-bottom:6px;
}
.scenario-content p{
  font-size:13px;line-height:1.7;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;
  overflow:hidden;
}
.scenario-link{
  display:inline-flex;align-items:center;gap:4px;
  font-size:13px;color:var(--accent);font-weight:500;
  margin-top:12px;transition:gap .2s ease;
}
.scenario-link:hover{gap:8px;text-decoration:underline;}

/* Steps */
.steps{padding:76px 0;}
.steps-panel{
  background:#fff;border:1px solid var(--border);
  border-radius:var(--r-lg);padding:56px 48px;
}
.steps-panel h2{
  text-align:center;font-size:22px;font-weight:600;color:var(--ink);
  margin-bottom:44px;
}
.steps-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:40px;
}
.step-index{
  display:flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:50%;
  background:rgba(0,200,150,.12);color:var(--accent);
  font-size:15px;font-weight:700;margin-bottom:16px;
}
.step-item h3{font-size:17px;font-weight:600;color:var(--text);margin-bottom:8px;}
.step-item p{font-size:14px;line-height:1.7;color:var(--muted);}

/* FAQ */
.faq{padding:76px 0;background:var(--card);border-top:1px solid var(--border);}
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-wrap h2{
  text-align:center;font-size:22px;font-weight:600;color:var(--ink);
  margin-bottom:40px;
}
.faq-item{
  background:#fff;border:1px solid var(--border);
  border-radius:var(--r-md);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease,background .2s ease;
}
.faq-item.open{
  background:#F7FAF8;border-color:rgba(0,200,150,.3);
}
.faq-question{
  width:100%;background:none;border:none;text-align:left;
  padding:20px 20px 20px 28px;
  font-size:15px;font-weight:500;color:var(--text);
  display:flex;align-items:center;gap:10px;
}
.faq-question::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--accent);flex-shrink:0;
}
.faq-question::after{
  content:"+";margin-left:auto;font-size:22px;font-weight:400;
  color:var(--muted);line-height:1;
  transition:transform .25s ease;
}
.faq-item.open .faq-question::after{transform:rotate(45deg);}
.faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease;
}
.faq-answer p{
  padding:0 24px 20px 44px;margin:0;
  font-size:14px;line-height:1.7;color:#4A5650;
}

/* CTA */
.cta{padding:76px 0;}
.cta-panel{
  background:var(--ink);border-radius:var(--r-lg);
  padding:56px 48px;text-align:center;color:#fff;
}
.version-badge{
  display:inline-block;
  background:var(--amber);color:var(--ink);
  font-size:13px;font-weight:600;
  border-radius:100px;padding:4px 14px;
  margin-bottom:20px;
}
.cta-panel h2{font-size:26px;font-weight:600;color:#fff;margin-bottom:12px;}
.cta-panel > p{color:#B7C2BC;margin-bottom:32px;font-size:15px;}
.cta-buttons{
  display:flex;justify-content:center;gap:16px;flex-wrap:wrap;
}
.cta-hint{
  font-size:12px;color:#8B958F;margin-top:18px;
}

/* Footer */
.site-footer{
  border-top:1px solid var(--border);
  background:var(--bg);padding:48px 0 24px;
}
.footer-top{
  display:grid;grid-template-columns:1.4fr 1fr;
  gap:56px;padding-bottom:32px;border-bottom:1px solid var(--border);
}
.footer-desc{
  font-size:13px;color:var(--muted);line-height:1.7;
  margin-top:14px;max-width:380px;
}
.footer-links{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.footer-col h6{
  font-size:13px;color:var(--muted);font-weight:600;
  margin-bottom:12px;
}
.footer-col a{
  display:block;font-size:14px;color:#56605B;
  padding:4px 0;transition:color .2s ease;
}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;
  padding-top:16px;font-size:12px;color:#A0A9A5;
}

/* Responsive */
@media (max-width:1024px){
  .hero-inner{gap:36px;}
  .features-grid{gap:40px;grid-template-columns:1fr 1fr;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .footer-top{grid-template-columns:1fr;gap:32px;}
}
@media (max-width:768px){
  .nav-toggle{
    display:flex;
  }
  .main-nav{
    position:fixed;inset:0;background:var(--bg);
    flex-direction:column;align-items:flex-start;justify-content:center;
    padding:24px 32px;gap:0;
    opacity:0;visibility:hidden;
    transition:opacity .25s ease,visibility .25s ease;
    z-index:-1;
  }
  .main-nav.open{
    opacity:1;visibility:visible;z-index:99;
  }
  .main-nav .nav-link{
    width:100%;font-size:20px;line-height:2;padding:10px 0;
    border-bottom:1px solid var(--border);
  }
  .main-nav .nav-cta{
    height:48px;width:100%;margin-top:32px;
    justify-content:center;font-size:16px;
  }
  .nav-toggle{z-index:100;}
  .hero{padding:56px 0 64px;}
  .hero-inner{grid-template-columns:1fr;gap:32px;}
  .hero-visual{order:-1? ;}
  .hero-visual img{max-height:360px;object-fit:cover;}
  .features-grid{grid-template-columns:1fr;}
  .features-visual{order:-1;}
  .features-visual img{max-height:320px;object-fit:cover;}
  .platform-panel{grid-template-columns:1fr;padding:40px 28px;gap:28px;}
  .steps-panel{padding:40px 28px;}
  .steps-grid{grid-template-columns:1fr;gap:32px;}
  .card-grid{grid-template-columns:1fr;}
  .cta-panel{padding:40px 28px;}
  .cta-buttons{flex-direction:column;align-items:stretch;}
  .cta-buttons .btn{width:100%;}
  .footer-links{grid-template-columns:repeat(3,1fr);gap:16px;}
}
@media (max-width:576px){
  .container{padding-left:18px;padding-right:18px;}
  .hero{padding:48px 0 56px;}
  .hero h1{font-size:28px;}
  .hero-sub{font-size:15px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .intro,.features,.platform,.scenarios,.steps,.faq,.cta{padding:56px 0;}
  .platform-panel,.steps-panel,.cta-panel{padding:32px 22px;}
  .footer-top{gap:24px;}
  .footer-links{grid-template-columns:1fr;gap:20px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    transition:none!important;animation:none!important;
  }
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root {
  --ink: #141A17;
  --ink-soft: #1F2723;
  --accent: #00C896;
  --accent-dark: #00B282;
  --accent-soft: rgba(0,200,150,.1);
  --bg: #FAFBF9;
  --card: #FFFFFF;
  --border: #E2E7E4;
  --text: #232A27;
  --text-muted: #6B7572;
  --text-weak: #8A938E;
  --amber: #FFB224;
  --error: #D15449;
  --radius-btn: 8px;
  --radius-card: 12px;
  --radius-img: 16px;
  --radius-pill: 100px;
  --shadow: 0 4px 20px rgba(16,24,20,.04);
  --shadow-hover: 0 4px 20px rgba(16,24,20,.08);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --space-section: 88px;
  --space-section-mobile: 48px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font-sans); font-size: 15px; line-height: 1.8; color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { margin: 0; padding: 0; }
h1, h2, h3, h4, h5, h6 { color: var(--ink); font-weight: 600; line-height: 1.4; margin: 0 0 16px; }
p { margin: 0 0 16px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-title { font-size: 22px; margin-bottom: 32px; position: relative; padding-left: 14px; }
.section-title::before { content: ''; position: absolute; left: 0; top: 4px; bottom: 4px; width: 4px; border-radius: 2px; background: var(--accent); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 40px; padding: 0 22px; border-radius: var(--radius-btn);
  font-size: 14px; font-weight: 500; letter-spacing: .02em;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
  white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-primary { background: var(--accent); color: #FFFFFF; }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(0,200,150,.16); }
.btn-primary:active { transform: translateY(1px); }
.btn-outline { background: #FFFFFF; border: 1px solid var(--border); color: var(--ink); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-outline-light { background: transparent; border: 1px solid rgba(255,255,255,.35); color: #FFFFFF; }
.btn-outline-light:hover { border-color: #FFFFFF; color: #FFFFFF; transform: translateY(-1px); }
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,251,249,.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-size: 17px; font-weight: 600; color: var(--ink); flex-shrink: 0; }
.brand-mark { flex-shrink: 0; }
.brand:hover .brand-mark rect { stroke: var(--accent); }
.main-nav { display: flex; align-items: center; gap: 28px; }
.nav-link { position: relative; font-size: 14px; color: #56605B; padding: 6px 2px; transition: color .2s ease; }
.nav-link::after { content: ''; position: absolute; left: 50%; bottom: -4px; width: 12px; height: 2px; border-radius: 2px; background: var(--accent); transform: translateX(-50%) scaleX(0); transform-origin: center; transition: transform .2s ease; }
.nav-link:hover { color: var(--accent); }
.nav-link.active { color: var(--ink); font-weight: 500; }
.nav-link.active::after { transform: translateX(-50%) scaleX(1); }
.nav-cta { height: 36px; padding: 0 18px; font-size: 13px; margin-left: 4px; }
.nav-toggle { display: none; width: 40px; height: 40px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; border-radius: 8px; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .25s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
.article-head {
  background: linear-gradient(180deg, rgba(250,251,249,.93), rgba(250,251,249,.98)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  border-bottom: 1px solid var(--border);
  padding: 48px 0 40px;
}
.article-head-inner { max-width: 760px; margin: 0 auto; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 13px; color: var(--text-muted); margin-bottom: 20px; }
.breadcrumb a { transition: color .2s ease; }
.breadcrumb a:hover { color: var(--accent); }
.crumb-divider { color: #C6CFCA; }
.crumb-current { color: var(--text); max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-title { font-size: 30px; line-height: 1.4; margin-bottom: 14px; word-break: break-word; }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 13px; color: var(--text-muted); }
.article-main { padding: 64px 0 72px; }
.article-inner { max-width: 760px; margin: 0 auto; }
.article-body { font-size: 16px; line-height: 1.8; color: var(--text); }
.article-body p { margin: 0 0 24px; }
.article-body h2 { font-size: 20px; font-weight: 600; margin: 44px 0 18px; padding-left: 14px; border-left: 3px solid var(--accent); color: var(--ink); }
.article-body h3 { font-size: 18px; font-weight: 600; margin: 36px 0 14px; color: var(--ink); }
.article-body h4 { font-size: 16px; font-weight: 600; margin: 32px 0 12px; color: var(--ink); }
.article-body ul { list-style: none; margin: 0 0 24px; padding: 0; }
.article-body ul li { position: relative; padding-left: 22px; margin-bottom: 10px; }
.article-body ul li::before { content: ''; position: absolute; left: 2px; top: .58em; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.article-body ol { margin: 0 0 24px; padding-left: 24px; }
.article-body ol li { margin-bottom: 10px; }
.article-body ol li::marker { color: var(--accent); font-weight: 600; }
.article-body blockquote { margin: 32px 0; padding: 20px 24px; background: #F0F5F2; border-left: 3px solid var(--accent); border-radius: 0 12px 12px 0; color: #3A423D; font-size: 15px; line-height: 1.7; }
.article-body pre { background: var(--ink); color: #EAF0EC; padding: 20px 24px; border-radius: 12px; overflow-x: auto; font-size: 13px; line-height: 1.6; margin-bottom: 24px; }
.article-body code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }
.article-body img { border-radius: 12px; margin: 28px auto; box-shadow: var(--shadow); }
.article-body table { width: 100%; border-collapse: collapse; margin-bottom: 28px; font-size: 14px; border-radius: 8px; overflow: hidden; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-body th { background: #F7FAF8; font-weight: 600; }
.article-body hr { border: none; border-top: 1px solid var(--border); margin: 40px 0; }
.article-empty { background: #FFFFFF; border: 1px dashed #C6CFCA; border-radius: var(--radius-card); padding: 48px 32px; text-align: center; color: var(--text-muted); }
.article-empty p { margin-bottom: 12px; }
.article-missing { display: flex; align-items: center; justify-content: center; min-height: 60vh; text-align: center; }
.article-missing .container { max-width: 560px; }
.article-missing h1 { font-size: 28px; margin-bottom: 8px; }
.article-missing p { color: var(--text-muted); margin-bottom: 24px; }
.article-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 40px 0 0; padding-top: 32px; border-top: 1px solid var(--border); }
.tag-label { font-size: 13px; color: var(--text-muted); margin-right: 4px; }
.tag { display: inline-flex; align-items: center; min-height: 24px; padding: 2px 12px; border-radius: var(--radius-pill); font-size: 12px; color: #00A87E; background: var(--accent-soft); transition: background .2s ease, color .2s ease; }
.tag:hover { background: var(--accent); color: #FFFFFF; }
.article-pagination { display: flex; justify-content: space-between; gap: 16px; margin-top: 24px; padding: 22px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.pagination-link { font-size: 14px; color: var(--text-muted); transition: color .2s ease, transform .2s ease; }
.pagination-link:hover { color: var(--accent); }
.related-section { padding: 72px 0; background: #FFFFFF; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { display: flex; align-items: center; gap: 16px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 12px; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; overflow: hidden; }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--accent); }
.related-card .related-cover { width: 104px; height: 78px; border-radius: 8px; object-fit: cover; flex-shrink: 0; overflow: hidden; }
.related-card .related-cover img { width: 100%; height: 100%; object-fit: cover; border-radius: 8px; transition: transform .3s ease; }
.related-card:hover .related-cover img { transform: scale(1.04); }
.related-body { min-width: 0; }
.related-body h3 { font-size: 14px; font-weight: 600; line-height: 1.5; margin: 0 0 6px; color: var(--ink); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-body time { font-size: 12px; color: var(--text-muted); }
.related-card img { width: 104px; height: 78px; object-fit: cover; border-radius: 8px; flex-shrink: 0; }
.article-cta { padding: 72px 0 88px; }
.return-links { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; max-width: 760px; margin: 0 auto 40px; }
.return-link { font-size: 14px; color: var(--text-muted); transition: color .2s ease; }
.return-link:hover { color: var(--accent); }
.back-top { font-size: 14px; color: var(--text-muted); padding: 8px 16px; border: 1px solid var(--border); border-radius: var(--radius-pill); background: #FFFFFF; transition: color .2s ease, border-color .2s ease, transform .2s ease; }
.back-top:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }
.cta-panel { background: var(--ink); border-radius: 16px; padding: 48px; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; position: relative; overflow: hidden; }
.cta-panel::before { content: ''; position: absolute; right: -60px; top: -60px; width: 180px; height: 180px; border-radius: 50%; background: rgba(0,200,150,.08); pointer-events: none; }
.cta-panel::after { content: ''; position: absolute; left: 40%; bottom: -80px; width: 160px; height: 160px; border-radius: 50%; background: rgba(0,200,150,.06); pointer-events: none; }
.cta-info { position: relative; z-index: 1; flex: 1; min-width: 240px; }
.cta-info h2 { font-size: 22px; color: #FFFFFF; margin-bottom: 8px; }
.cta-info p { color: #B7C2BC; font-size: 14px; margin-bottom: 0; }
.cta-actions { position: relative; z-index: 1; display: flex; gap: 14px; flex-wrap: wrap; }
.site-footer { border-top: 1px solid var(--border); background: var(--bg); }
.footer-top { display: flex; justify-content: space-between; gap: 48px; padding: 48px 0 32px; flex-wrap: wrap; }
.footer-brand { max-width: 320px; flex: 1; min-width: 240px; }
.footer-brand .brand { margin-bottom: 14px; }
.footer-desc { font-size: 13px; color: var(--text-muted); line-height: 1.7; margin: 0; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; flex: 1; max-width: 560px; }
.footer-col h6 { font-size: 13px; font-weight: 600; color: var(--text-weak); margin: 0 0 12px; text-transform: uppercase; letter-spacing: .04em; }
.footer-col a { display: block; font-size: 14px; color: var(--text-muted); padding: 4px 0; transition: color .2s ease; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid var(--border); padding: 20px 0 24px; display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--text-weak); flex-wrap: wrap; gap: 8px; }
@media (max-width: 1024px) {
  .article-title { font-size: 28px; }
  .footer-top { flex-direction: column; gap: 32px; }
  .footer-links { max-width: 100%; }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
    background: var(--bg);
    flex-direction: column; align-items: flex-start;
    gap: 0; padding: 32px 28px;
    transform: translateX(100%);
    transition: transform .3s ease;
    z-index: 99;
    overflow-y: auto;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav .nav-link { font-size: 20px; line-height: 2; width: 100%; padding: 12px 0; border-bottom: 1px solid var(--border); }
  .main-nav .nav-link.active::after { left: 0; transform: none; width: 24px; bottom: -2px; }
  .main-nav .nav-cta { margin-top: 28px; width: 100%; height: 46px; font-size: 15px; }
  .article-head { padding: 36px 0 28px; }
  .article-title { font-size: 24px; }
  .article-main { padding: 48px 0 56px; }
  .article-body { font-size: 15px; }
  .related-grid { grid-template-columns: 1fr; gap: 16px; }
  .related-card { max-width: 480px; }
  .related-section { padding: 48px 0; }
  .article-cta { padding: 48px 0 64px; }
  .cta-panel { padding: 32px 24px; flex-direction: column; align-items: flex-start; }
  .cta-actions { width: 100%; }
  .cta-actions .btn { flex: 1; }
  .footer-top { padding-top: 36px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .section-title { font-size: 20px; }
  .article-title { font-size: 22px; }
  .article-meta { gap: 6px 14px; flex-direction: column; }
  .article-pagination { flex-direction: column; gap: 8px; text-align: center; }
  .return-links { flex-direction: column; align-items: center; gap: 12px; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .btn { white-space: normal; }
  .related-card .related-cover, .related-card img { width: 88px; height: 66px; }
  .footer-bottom { flex-direction: column; gap: 6px; text-align: center; }
}