/* roulang page: index */
:root {
  --primary: #0B6E5A;
  --primary-dark: #09584A;
  --primary-bright: #17A07A;
  --accent: #D8963E;
  --bg-page: #F6F8F7;
  --bg-card: #FFFFFF;
  --bg-deep: #0B2E26;
  --text-heading: #0F241D;
  --text-body: #2C3A35;
  --text-muted: #5B6B66;
  --border-soft: rgba(11, 110, 90, 0.08);
  --radius-card: 20px;
  --radius-btn: 14px;
  --radius-input: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 30px rgba(11, 110, 90, 0.06);
  --shadow-hover: 0 14px 40px rgba(11, 110, 90, 0.12);
  --shadow-btn: 0 10px 24px rgba(11, 110, 90, 0.25);
  --gradient-brand: linear-gradient(135deg, #0B6E5A 0%, #17A07A 100%);
  --space-section: 112px;
  --space-section-mobile: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text-body);
  font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  line-height: 1.4;
  font-weight: 700;
  margin-top: 0;
}

h1 { font-size: 40px; }
h2 { font-size: 30px; margin-bottom: 16px; }
h3 { font-size: 20px; margin-bottom: 12px; }

p {
  margin-top: 0;
  margin-bottom: 16px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

button,
input {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
  box-shadow: 0 0 0 4px rgba(216, 150, 62, 0.35);
}

.container {
  max-width: 1280px;
  padding-left: 24px;
  padding-right: 24px;
}

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

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: #FBFCFB;
  border-bottom: 1px solid var(--border-soft);
  box-shadow: 0 4px 12px rgba(11, 110, 90, 0.04);
}

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

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--gradient-brand);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.5px;
  border-radius: 12px;
  box-shadow: 0 6px 14px rgba(11, 110, 90, 0.25);
}

.brand-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-heading);
  white-space: nowrap;
}

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

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0);
  transform-origin: center;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(11, 110, 90, 0.05);
}

.nav-link:hover::after,
.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-link.active {
  background: rgba(11, 110, 90, 0.08);
  color: var(--primary);
  font-weight: 600;
}

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

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

.search-box svg {
  position: absolute;
  left: 14px;
  width: 16px;
  height: 16px;
  stroke: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  width: 180px;
  height: 40px;
  padding: 0 16px 0 38px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: #F2F5F3;
  color: var(--text-body);
  font-size: 14px;
  transition: width 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box input:focus {
  width: 220px;
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(11, 110, 90, 0.12);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  background: #fff;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-heading);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

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

@media (max-width: 992px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 24px;
    right: 24px;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border-radius: 16px;
    padding: 16px;
    box-shadow: 0 18px 40px rgba(11, 110, 90, 0.14);
    border: 1px solid var(--border-soft);
    gap: 4px;
  }
  .main-nav.open {
    display: flex;
  }
  .nav-link {
    padding: 12px 16px;
    border-radius: 12px;
  }
  .nav-link::after {
    display: none;
  }
  .header-actions {
    margin-left: auto;
  }
  .search-box {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.btn-lg {
  height: 52px;
  padding: 0 32px;
  font-size: 16px;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 6px 18px rgba(11, 110, 90, 0.28);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn);
  filter: brightness(1.06);
}

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

.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: rgba(11, 110, 90, 0.06);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

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

.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.btn-white:hover {
  background: #f8faf9;
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ===== Data Badge ===== */
.data-badge {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  box-shadow: var(--shadow-card);
  text-align: center;
  line-height: 1.3;
}

.stat-num {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

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

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 96px 0 80px;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(11, 110, 90, 0.08);
  pointer-events: none;
}

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

.hero h1 {
  font-size: 44px;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-body);
  max-width: 400px;
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}

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

.hero-visual {
  position: relative;
}

.window-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 16px;
  box-shadow: 0 24px 60px rgba(11, 110, 90, 0.12);
  border: 1px solid var(--border-soft);
}

.window-dots {
  display: flex;
  gap: 8px;
  padding: 4px 4px 14px;
}

.window-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #E46A5E;
}

.window-dots span:nth-child(2) {
  background: var(--accent);
}

.window-dots span:nth-child(3) {
  background: #4CAF50;
}

.window-img {
  width: 100%;
  border-radius: 12px;
  object-fit: cover;
  height: 320px;
  display: block;
}

@media (max-width: 992px) {
  .hero {
    padding: 64px 0 56px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero-visual {
    margin-top: 40px;
  }
  .window-img {
    height: 220px;
  }
}

/* ===== Feature Section ===== */
.feature-section {
  padding: var(--space-section) 0;
}

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

.section-head h2 {
  font-size: 30px;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 16px;
}

.feature-row {
  padding: 24px 0;
  margin-bottom: 24px;
  scroll-margin-top: 80px;
}

.feature-media,
.feature-content {
  padding: 16px;
}

.feature-media img {
  width: 100%;
  border-radius: var(--radius-card);
  object-fit: cover;
  height: 360px;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border-soft);
}

.feature-content {
  padding-left: 40px;
  padding-right: 40px;
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: var(--gradient-brand);
  color: #fff;
  border-radius: 16px;
  margin-bottom: 20px;
  box-shadow: 0 8px 20px rgba(11, 110, 90, 0.22);
}

.feature-icon svg {
  width: 26px;
  height: 26px;
}

.feature-content h3 {
  font-size: 22px;
  margin-bottom: 14px;
}

.feature-content p {
  color: var(--text-body);
  line-height: 1.7;
}

.gold-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  background: rgba(216, 150, 62, 0.12);
  border: 1px solid rgba(216, 150, 62, 0.28);
  color: #9C6B1F;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  margin-top: 12px;
}

@media (max-width: 992px) {
  .feature-media img {
    height: 240px;
  }
  .feature-content {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ===== Screenshot Carousel ===== */
.screenshot-section {
  background: #EEF4F0;
  padding: var(--space-section) 0;
}

.screenshot-section .section-head {
  margin-bottom: 44px;
}

.screenshot-carousel {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  position: relative;
}

.screenshot-carousel .carousel-item img {
  height: 540px;
  object-fit: cover;
  width: 100%;
}

.screenshot-carousel .carousel-caption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 40px 32px 24px;
  background: linear-gradient(180deg, rgba(11,46,38,0) 0%, rgba(11,46,38,0.78) 100%);
  text-align: left;
  color: #fff;
  font-size: 15px;
}

.screenshot-carousel .carousel-caption p {
  margin: 0;
}

.screenshot-carousel .carousel-control-prev,
.screenshot-carousel .carousel-control-next {
  width: 44px;
  height: 44px;
  top: 50%;
  transform: translateY(-50%);
  bottom: auto;
  margin: 0 20px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text-heading);
  border: none;
  opacity: 0.9;
  transition: background 0.25s ease, opacity 0.25s ease;
}

.screenshot-carousel .carousel-control-prev:hover,
.screenshot-carousel .carousel-control-next:hover {
  background: #fff;
  opacity: 1;
}

.screenshot-carousel .carousel-control-prev-icon,
.screenshot-carousel .carousel-control-next-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: none;
  font-size: 0;
}

.screenshot-carousel .carousel-control-prev-icon::before,
.screenshot-carousel .carousel-control-next-icon::before {
  content: "";
  width: 10px;
  height: 10px;
  border-left: 2px solid var(--text-heading);
  border-bottom: 2px solid var(--text-heading);
  display: block;
}

.screenshot-carousel .carousel-control-prev-icon::before {
  transform: rotate(45deg);
  margin-left: 5px;
}

.screenshot-carousel .carousel-control-next-icon::before {
  transform: rotate(-135deg);
  margin-right: 5px;
}

.screenshot-carousel .carousel-indicators {
  margin-bottom: 36px;
}

.screenshot-carousel .carousel-indicators [data-bs-target] {
  width: 28px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
  opacity: 0.45;
  border: none;
  margin: 0 4px;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.screenshot-carousel .carousel-indicators .active {
  opacity: 1;
  transform: scaleX(1.1);
}

@media (max-width: 768px) {
  .screenshot-carousel .carousel-item img {
    height: 320px;
  }
  .screenshot-carousel .carousel-control-prev,
  .screenshot-carousel .carousel-control-next {
    display: none;
  }
}

/* ===== Requirements ===== */
.requirements-section {
  padding: var(--space-section) 0;
  background: linear-gradient(180deg, var(--bg-page) 0%, #EDF3EF 100%);
}

.req-wrapper {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: start;
}

.config-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.config-card {
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.config-card h3 {
  font-size: 17px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.config-card h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}

.config-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.config-list li {
  position: relative;
  padding: 9px 0 9px 28px;
  font-size: 14px;
  color: var(--text-body);
  border-bottom: 1px dashed rgba(11, 110, 90, 0.08);
}

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

.config-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 15px;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: rgba(11, 110, 90, 0.14);
}

.compat-wall {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 14px;
  background: #fff;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-soft);
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.compat-wall h3 {
  width: 100%;
  font-size: 17px;
  margin-bottom: 8px;
}

.compat-badge {
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  background: #F0F6F3;
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid rgba(11, 110, 90, 0.1);
  transition: background 0.25s ease, border-color 0.25s ease;
}

.compat-badge:hover {
  background: #E5EFEA;
  border-color: rgba(11, 110, 90, 0.2);
}

@media (max-width: 992px) {
  .req-wrapper {
    grid-template-columns: 1fr;
  }
}

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

/* ===== Testimonials ===== */
.testimonials {
  background: var(--bg-deep);
  padding: var(--space-section) 0;
}

.testimonials h2 {
  color: #fff;
  margin-bottom: 8px;
}

.testimonials .section-desc {
  color: rgba(255, 255, 255, 0.65);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.testimonial-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: background 0.3s ease, transform 0.3s ease;
}

.testimonial-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
}

.testimonial-stars {
  color: var(--accent);
  font-size: 18px;
  letter-spacing: 3px;
  margin-bottom: 14px;
}

.testimonial-text {
  color: rgba(255, 255, 255, 0.92);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.testimonial-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.testimonial-name {
  color: #fff;
  font-weight: 600;
  font-size: 14px;
}

.testimonial-tag {
  display: inline-flex;
  padding: 4px 12px;
  background: rgba(216, 150, 62, 0.18);
  color: var(--accent);
  font-size: 12px;
  border-radius: 999px;
}

@media (max-width: 768px) {
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Download Section ===== */
.download-section {
  padding: var(--space-section) 0;
  background: var(--bg-page);
}

.download-card {
  max-width: 860px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: 20px;
  padding: 48px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.dl-stats {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.dl-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
}

.qrcode-wrap {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 20px;
}

.qrcode-wrap svg {
  width: 120px;
  height: 120px;
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  padding: 8px;
  background: #fff;
}

.qrcode-wrap span {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

.dl-note {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}

@media (max-width: 600px) {
  .download-card {
    padding: 32px 24px;
  }
}

/* ===== News Section ===== */
.news-section {
  padding: var(--space-section) 0;
  background: var(--bg-page);
}

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

.news-head h2 {
  margin: 0;
}

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

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

.news-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.news-item {
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

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

.news-item-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px;
}

.news-thumb {
  width: 160px;
  height: 96px;
  flex-shrink: 0;
  border-radius: 12px;
  overflow: hidden;
  background: #EAF1ED;
}

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

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

.news-body h3 {
  font-size: 18px;
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.news-body p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.news-meta .tag {
  display: inline-flex;
  padding: 4px 12px;
  background: rgba(11, 110, 90, 0.08);
  color: var(--primary);
  border-radius: 999px;
  font-weight: 500;
}

.news-meta time {
  font-variant-numeric: tabular-nums;
}

@media (max-width: 600px) {
  .news-item-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .news-thumb {
    width: 100%;
    height: 160px;
  }
}

/* ===== Empty State ===== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 48px 24px;
  border: 2px dashed rgba(11, 110, 90, 0.14);
  border-radius: 16px;
  text-align: center;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.6);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  color: rgba(11, 110, 90, 0.3);
}

.empty-state p {
  font-size: 14px;
  margin: 0;
}

/* ===== CTA Banner ===== */
.cta-banner {
  padding: 0 0 var(--space-section);
  background: var(--bg-page);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 36px 44px;
  background: var(--gradient-brand);
  border-radius: 20px;
  color: #fff;
  box-shadow: 0 18px 40px rgba(11, 110, 90, 0.28);
  flex-wrap: wrap;
}

.cta-inner p {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: #fff;
}

.cta-inner .btn-white {
  flex-shrink: 0;
}

@media (max-width: 600px) {
  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 24px;
  }
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 24px;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .brand-name {
  color: #fff;
}

.footer-brand p {
  font-size: 14px;
  margin: 16px 0;
  color: rgba(255, 255, 255, 0.6);
  max-width: 280px;
}

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

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  margin-bottom: 10px;
  transition: color 0.25s ease;
}

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

.footer-col p {
  margin: 0 0 10px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 24px;
  text-align: center;
  color: rgba(255, 255, 255, 0.45);
  font-size: 13px;
}

.footer-bottom p {
  margin: 0;
}

.icp {
  display: inline-block;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .section {
    --space-section: var(--space-section-mobile);
  }
  .feature-section,
  .requirements-section,
  .screenshot-section,
  .testimonials,
  .download-section,
  .news-section,
  .cta-banner {
    padding-top: var(--space-section-mobile);
    padding-bottom: var(--space-section-mobile);
  }
}

/* ===== Tablet / Mobile tweaks ===== */
@media (max-width: 768px) {
  h1 { font-size: 30px; }
  h2 { font-size: 24px; }
  h3 { font-size: 18px; }
  body { font-size: 15px; }
  .hero h1 { font-size: 30px; }
  .hero-subtitle { font-size: 16px; }
  .news-thumb { height: 130px; }
}

@media (max-width: 576px) {
  .btn-lg {
    width: 100%;
  }
  .hero-actions {
    flex-direction: column;
  }
  .card,
  .window-card,
  .config-card,
  .testimonial-card,
  .download-card {
    border-radius: 16px;
  }
  .dl-buttons .btn {
    width: 100%;
  }
}

/* roulang page: category1 */
:root {
  --pg-primary: #0B6E5A;
  --pg-primary-dark: #09584A;
  --pg-primary-light: #17A07A;
  --pg-accent: #D8963E;
  --pg-bg: #F6F8F7;
  --pg-card: #FFFFFF;
  --pg-dark: #0B2E26;
  --pg-heading: #0F241D;
  --pg-text: #2C3A35;
  --pg-muted: #5B6B66;
  --pg-border: rgba(11, 110, 90, 0.08);
  --pg-radius-lg: 20px;
  --pg-radius-md: 14px;
  --pg-radius-sm: 12px;
  --pg-shadow: 0 8px 30px rgba(11, 110, 90, 0.06);
  --pg-shadow-hover: 0 14px 40px rgba(11, 110, 90, 0.12);
  --pg-gap: 112px;
  --pg-font: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--pg-font);
  background: var(--pg-bg);
  color: var(--pg-text);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--pg-primary);
  text-decoration: none;
  transition: color .2s ease;
}

a:hover {
  color: var(--pg-primary-dark);
}

:focus-visible {
  outline: 2px solid var(--pg-primary);
  outline-offset: 2px;
  border-radius: 4px;
  box-shadow: 0 0 0 1px rgba(216, 150, 62, 0.6);
}

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

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #FBFCFB;
  border-bottom: 1px solid rgba(11, 110, 90, 0.08);
  box-shadow: 0 4px 12px rgba(11, 110, 90, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--pg-primary), var(--pg-primary-light));
  color: #fff;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--pg-heading);
  white-space: nowrap;
}

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

.nav-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--pg-text);
  border-radius: 999px;
  transition: all .2s ease;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background: var(--pg-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}

.nav-link:hover {
  color: var(--pg-primary);
  background: rgba(11, 110, 90, 0.05);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.active {
  background: rgba(11, 110, 90, 0.08);
  color: var(--pg-primary);
  font-weight: 600;
}

.nav-link.active::after {
  transform: scaleX(1);
}

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

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #F2F5F3;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0 14px;
  height: 40px;
  width: 180px;
  transition: all .25s ease;
}

.search-box:focus-within {
  width: 240px;
  border-color: var(--pg-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(11, 110, 90, 0.08);
}

.search-box svg {
  width: 16px;
  height: 16px;
  stroke: var(--pg-muted);
  flex-shrink: 0;
}

.search-box input {
  border: 0;
  outline: none;
  background: transparent;
  font-size: 14px;
  color: var(--pg-text);
  width: 100%;
}

.search-box input::placeholder {
  color: #9AA8A2;
}

.btn {
  font-family: var(--pg-font);
  border-radius: var(--pg-radius-md);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1.5px solid transparent;
  transition: all .25s ease;
  cursor: pointer;
  line-height: 1.4;
}

.btn-primary {
  background: linear-gradient(135deg, var(--pg-primary), var(--pg-primary-light));
  border-color: transparent;
  color: #fff;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0d7d66, #1bb387);
  transform: translateY(-2px);
  color: #fff;
  box-shadow: 0 10px 24px rgba(11, 110, 90, 0.25);
}

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

.btn-outline {
  background: transparent;
  border-color: var(--pg-primary);
  color: var(--pg-primary);
}

.btn-outline:hover {
  background: rgba(11, 110, 90, 0.06);
  color: var(--pg-primary);
  transform: translateY(-2px);
}

.btn-lg {
  height: 50px;
  padding: 0 30px;
  font-size: 15px;
}

.btn-light-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
}

.btn-light-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  transform: translateY(-2px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(11, 110, 90, 0.1);
  border-radius: 10px;
  background: #fff;
  padding: 10px;
  cursor: pointer;
  transition: background .2s ease;
}

.nav-toggle:hover {
  background: rgba(11, 110, 90, 0.04);
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--pg-primary);
  border-radius: 2px;
  transition: all .3s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ===== Page Hero ===== */
.page-hero {
  padding: 72px 0 64px;
  background: linear-gradient(135deg, rgba(11, 46, 38, 0.88), rgba(11, 110, 90, 0.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.crumbs {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.crumbs a {
  color: rgba(255, 255, 255, 0.85);
  transition: color .2s ease;
}

.crumbs a:hover {
  color: #fff;
}

.crumbs .sep {
  opacity: 0.6;
}

.page-hero h1 {
  font-size: 40px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.page-hero .hero-sub {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 640px;
  margin: 0;
}

/* ===== Sections ===== */
.section-pad {
  padding: var(--pg-gap) 0;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-eyebrow {
  display: inline-block;
  background: rgba(11, 110, 90, 0.08);
  color: var(--pg-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--pg-heading);
  line-height: 1.4;
  margin: 0 0 12px;
}

.section-head p {
  color: var(--pg-muted);
  font-size: 16px;
  margin: 0;
}

/* ===== Feature Blocks ===== */
.feature-block {
  padding: 56px 0;
}

.feature-block + .feature-block {
  border-top: 1px solid rgba(11, 110, 90, 0.05);
}

.feature-media {
  position: relative;
  border-radius: var(--pg-radius-lg);
  overflow: hidden;
  box-shadow: var(--pg-shadow);
  background: #EAF0ED;
}

.feature-media img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: var(--pg-radius-lg);
  transition: transform .4s ease;
}

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

.feature-tag {
  display: inline-block;
  background: rgba(11, 110, 90, 0.08);
  color: var(--pg-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 16px;
}

.feature-copy h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--pg-heading);
  margin: 0 0 14px;
  line-height: 1.35;
}

.feature-copy .lead {
  color: var(--pg-muted);
  font-size: 16px;
  margin-bottom: 20px;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  font-size: 15px;
  color: var(--pg-text);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: rgba(11, 110, 90, 0.1);
  border: 2px solid var(--pg-primary);
}

.feature-metric {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--pg-primary), var(--pg-primary-light));
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  padding: 8px 18px;
  margin-top: 22px;
  box-shadow: 0 8px 20px rgba(11, 110, 90, 0.18);
}

.feature-metric strong {
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ===== Spec Table ===== */
.spec-section {
  padding: var(--pg-gap) 0;
  background: #F2F5F3;
}

.spec-card {
  background: var(--pg-card);
  border: 1px solid var(--pg-border);
  border-radius: var(--pg-radius-lg);
  box-shadow: var(--pg-shadow);
  overflow: hidden;
  max-width: 960px;
  margin: 0 auto;
}

.spec-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 20px;
  padding: 20px 28px;
  border-bottom: 1px solid rgba(11, 110, 90, 0.06);
  align-items: baseline;
}

.spec-row:last-child {
  border-bottom: 0;
}

.spec-row:nth-child(odd) {
  background: #FAFCFB;
}

.spec-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--pg-heading);
  display: flex;
  align-items: center;
  gap: 8px;
}

.spec-label svg {
  width: 18px;
  height: 18px;
  stroke: var(--pg-primary);
  flex-shrink: 0;
}

.spec-value {
  font-size: 14px;
  color: var(--pg-text);
  line-height: 1.7;
}

.spec-note {
  text-align: center;
  color: var(--pg-muted);
  font-size: 13px;
  margin-top: 20px;
}

/* ===== CTA Banner ===== */
.cta-section {
  padding: var(--pg-gap) 0;
}

.cta-card {
  background: linear-gradient(135deg, var(--pg-primary), var(--pg-primary-light));
  border-radius: var(--pg-radius-lg);
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  color: #fff;
  box-shadow: 0 16px 44px rgba(11, 110, 90, 0.28);
  position: relative;
  overflow: hidden;
}

.cta-card::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}

.cta-card h2 {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 8px;
}

.cta-card p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
}

.cta-actions {
  display: flex;
  gap: 14px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--pg-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .brand-logo {
  background: linear-gradient(135deg, var(--pg-primary), var(--pg-primary-light));
}

.footer-brand .brand-name {
  color: #fff;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
  margin: 16px 0 14px;
  max-width: 280px;
}

.icp {
  display: inline-block;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  padding: 4px 12px;
}

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

.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 10px;
  transition: color .2s ease;
}

.footer-col a:hover {
  color: #D8963E;
}

.footer-col p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 8px;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== Media Queries ===== */
@media (max-width: 1199.98px) {
  .search-box {
    width: 150px;
  }

  .search-box:focus-within {
    width: 180px;
  }

  .nav-link {
    padding: 8px 12px;
  }
}

@media (max-width: 991.98px) {
  .header-inner {
    height: 64px;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 16px;
    right: 16px;
    z-index: 999;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(11, 46, 38, 0.18);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    display: none;
    border: 1px solid var(--pg-border);
  }

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

  .nav-link,
  .nav-link::after {
    display: block;
  }

  .nav-link {
    padding: 12px 16px;
    border-radius: 10px;
    text-align: left;
    font-size: 15px;
  }

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

  .nav-link.active {
    background: rgba(11, 110, 90, 0.08);
  }

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

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

  .nav-toggle {
    display: flex;
  }

  .section-pad {
    padding: 64px 0;
  }

  .cta-card {
    padding: 36px 32px;
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-actions {
    width: 100%;
    flex-wrap: wrap;
  }

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

@media (max-width: 767.98px) {
  .page-hero {
    padding: 48px 0 40px;
  }

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

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

  .section-head {
    margin-bottom: 40px;
  }

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

  .feature-block {
    padding: 40px 0;
  }

  .feature-copy h2 {
    font-size: 24px;
  }

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

  .spec-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 16px 22px;
  }

  .spec-label {
    font-size: 13px;
  }

  .cta-card {
    border-radius: 16px;
    padding: 32px 24px;
  }

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

  .cta-actions .btn {
    flex: 1;
    min-width: 140px;
  }

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

@media (max-width: 575.98px) {
  .header-actions .btn {
    display: none;
  }

  .feature-media img {
    height: 220px;
  }

  .feature-metric {
    font-size: 12px;
    padding: 6px 14px;
  }

  .feature-metric strong {
    font-size: 16px;
  }

  .cta-actions {
    flex-direction: column;
  }

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

/* roulang page: article */
:root {
            --primary: #0B6E5A;
            --primary-dark: #09584A;
            --primary-light: #17A07A;
            --accent: #D8963E;
            --bg-page: #F6F8F7;
            --bg-card: #FFFFFF;
            --bg-deep: #0B2E26;
            --heading-color: #0F241D;
            --text-color: #2C3A35;
            --text-muted: #5B6B66;
            --border-color: rgba(11, 110, 90, 0.08);
            --border-light: rgba(11, 110, 90, 0.12);
            --radius-large: 20px;
            --radius-btn: 14px;
            --radius-input: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 8px 30px rgba(11, 110, 90, 0.06);
            --shadow-hover: 0 14px 40px rgba(11, 110, 90, 0.12);
            --section-gap: 112px;
            --font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-page);
            color: var(--text-color);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            font-variant-numeric: tabular-nums;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input {
            font-family: inherit;
            border: none;
            background: none;
        }
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(216, 150, 62, 0.18);
            border-radius: 6px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 导航 ========== */
        .site-header {
            background: #FBFCFB;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 8px rgba(11, 110, 90, 0.04);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 72px;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 16px;
            letter-spacing: -0.5px;
        }
        .brand-name {
            font-size: 16px;
            font-weight: 600;
            color: var(--heading-color);
            white-space: nowrap;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .main-nav .nav-link {
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-color);
            border-radius: var(--radius-pill);
            position: relative;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }
        .main-nav .nav-link::after {
            content: "";
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        .main-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(11, 110, 90, 0.04);
        }
        .main-nav .nav-link:hover::after {
            transform: scaleX(1);
        }
        .main-nav .nav-link.active {
            background: rgba(11, 110, 90, 0.08);
            color: var(--primary);
            font-weight: 600;
        }
        .main-nav .nav-link.active::after {
            transform: scaleX(1);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-left: auto;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: #F2F5F3;
            border-radius: var(--radius-pill);
            padding: 0 14px;
            height: 42px;
            width: 180px;
            transition: width 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid transparent;
        }
        .search-box:focus-within {
            width: 240px;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(11, 110, 90, 0.12);
        }
        .search-box svg {
            width: 18px;
            height: 18px;
            stroke: var(--text-muted);
            flex-shrink: 0;
            margin-right: 8px;
        }
        .search-box input {
            width: 100%;
            background: transparent;
            outline: none;
            font-size: 14px;
            color: var(--heading-color);
        }
        .search-box input::placeholder {
            color: #9AAAA5;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            cursor: pointer;
            border: 1.5px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            padding: 0 24px;
            height: 46px;
            font-size: 15px;
            box-shadow: 0 4px 16px rgba(11, 110, 90, 0.2);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(11, 110, 90, 0.28);
            filter: brightness(1.06);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-ghost {
            background: transparent;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            padding: 0 24px;
            height: 46px;
            font-size: 15px;
        }
        .btn-ghost:hover {
            background: rgba(11, 110, 90, 0.06);
            color: var(--primary-dark);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            padding: 0 24px;
            height: 46px;
            font-size: 15px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1);
            color: var(--primary);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 10px;
            border-radius: 10px;
            cursor: pointer;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--heading-color);
            border-radius: 2px;
            transition: all 0.3s;
        }

        /* ========== 面包屑 ========== */
        .page-bar {
            background: linear-gradient(135deg, rgba(11, 110, 90, 0.06), rgba(23, 160, 122, 0.03));
            border-bottom: 1px solid var(--border-color);
            padding: 28px 0 24px;
        }
        .breadcrumb-list {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            list-style: none;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-list a {
            color: var(--primary);
            font-weight: 500;
            transition: color 0.2s;
        }
        .breadcrumb-list a:hover {
            color: var(--primary-dark);
        }
        .breadcrumb-list .sep {
            color: #B8C6C1;
            font-weight: 400;
        }
        .breadcrumb-list .current {
            color: var(--text-muted);
            max-width: 420px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ========== 文章主体 ========== */
        .article-section {
            padding: 56px 0 0;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-large);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 56px;
            max-width: 1040px;
            margin: 0 auto;
        }
        .article-header {
            margin-bottom: 36px;
        }
        .article-header h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--heading-color);
            margin: 0 0 20px;
            font-feature-settings: "tnum";
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .meta-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #F2F5F3;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-pill);
            padding: 6px 14px;
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }
        .meta-pill svg {
            width: 14px;
            height: 14px;
            stroke: var(--primary);
        }
        .article-cover {
            border-radius: 16px;
            overflow: hidden;
            margin-bottom: 44px;
            position: relative;
            background: #E8EEEB;
        }
        .article-cover img {
            width: 100%;
            height: auto;
            aspect-ratio: 21/10;
            object-fit: cover;
        }
        .article-cover figcaption {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 32px 20px 12px;
            background: linear-gradient(to top, rgba(11, 46, 38, 0.75), transparent);
            color: #fff;
            font-size: 13px;
            text-align: center;
        }

        /* ========== 正文排版 ========== */
        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-color);
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--heading-color);
            margin: 48px 0 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid rgba(11, 110, 90, 0.1);
            line-height: 1.4;
        }
        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--heading-color);
            margin: 32px 0 12px;
            line-height: 1.4;
        }
        .article-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--heading-color);
            margin: 24px 0 10px;
        }
        .article-content p {
            margin: 0 0 24px;
            line-height: 1.9;
        }
        .article-content a {
            color: var(--primary);
            font-weight: 500;
            border-bottom: 1px solid rgba(11, 110, 90, 0.3);
            transition: border-color 0.2s;
        }
        .article-content a:hover {
            border-color: var(--primary);
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(11, 110, 90, 0.05);
            padding: 22px 26px;
            border-radius: 0 14px 14px 0;
            margin: 36px 0;
            color: var(--text-color);
            font-style: normal;
        }
        .article-content blockquote p {
            margin: 0;
        }
        .article-content img {
            border-radius: 12px;
            margin: 32px auto;
            max-width: 100%;
            height: auto;
        }
        .article-content img + em {
            display: block;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
            margin: -20px 0 32px;
            font-style: normal;
        }
        .article-content table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border-radius: 14px;
            overflow: hidden;
            margin: 36px 0;
            border: 1px solid rgba(11, 110, 90, 0.1);
            font-size: 15px;
        }
        .article-content table th {
            background: var(--primary);
            color: #fff;
            padding: 13px 18px;
            font-weight: 600;
            text-align: left;
            border: none;
        }
        .article-content table td {
            padding: 12px 18px;
            border-top: 1px solid rgba(11, 110, 90, 0.08);
            border-left: none;
            border-right: none;
        }
        .article-content table tr:nth-child(even) td {
            background: rgba(11, 110, 90, 0.02);
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 24px;
            padding-left: 0;
            list-style: none;
        }
        .article-content ul li {
            position: relative;
            padding-left: 22px;
            margin-bottom: 10px;
            line-height: 1.8;
        }
        .article-content ul li::before {
            content: "·";
            position: absolute;
            left: 6px;
            color: var(--primary);
            font-weight: 800;
            font-size: 18px;
            top: -2px;
        }
        .article-content ol {
            counter-reset: item;
            padding-left: 0;
        }
        .article-content ol li {
            position: relative;
            padding-left: 32px;
            margin-bottom: 10px;
            counter-increment: item;
        }
        .article-content ol li::before {
            content: counter(item);
            position: absolute;
            left: 0;
            top: 2px;
            width: 22px;
            height: 22px;
            background: rgba(11, 110, 90, 0.08);
            color: var(--primary);
            border-radius: 50%;
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .article-content code {
            background: rgba(11, 110, 90, 0.08);
            border-radius: 6px;
            padding: 2px 8px;
            font-family: "SF Mono", Monaco, Consolas, monospace;
            font-size: 14px;
            color: var(--primary-dark);
        }
        .article-content pre {
            background: #0B2E26;
            border-radius: 14px;
            padding: 24px;
            overflow-x: auto;
            color: #E8F5F0;
            font-size: 14px;
            line-height: 1.7;
            margin: 32px 0;
        }
        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        /* ========== 文末标签与分页 ========== */
        .article-footer {
            border-top: 1px solid var(--border-color);
            margin-top: 48px;
            padding-top: 32px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }
        .tag-pill {
            background: rgba(11, 110, 90, 0.07);
            color: var(--primary);
            border-radius: var(--radius-pill);
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            transition: background 0.2s;
        }
        .tag-pill:hover {
            background: rgba(11, 110, 90, 0.12);
        }
        .article-pager {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
        }
        .pager-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            padding: 10px 18px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-pill);
            background: #FBFCFB;
            transition: all 0.25s;
            max-width: 280px;
        }
        .pager-link:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(11, 110, 90, 0.04);
        }
        .pager-link .pager-label {
            display: block;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 2px;
        }
        .pager-link .pager-title {
            display: block;
            font-size: 14px;
            color: var(--heading-color);
            font-weight: 600;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 180px;
        }
        .pager-back {
            padding: 10px 22px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            transition: all 0.25s;
            box-shadow: 0 4px 12px rgba(11, 110, 90, 0.2);
        }
        .pager-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ========== 空状态 ========== */
        .article-empty {
            background: var(--bg-card);
            border-radius: var(--radius-large);
            border: 2px dashed rgba(11, 110, 90, 0.2);
            padding: 80px 40px;
            text-align: center;
            max-width: 700px;
            margin: 40px auto;
        }
        .article-empty svg {
            width: 48px;
            height: 48px;
            stroke: var(--text-muted);
            margin-bottom: 16px;
        }
        .article-empty p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .article-empty a {
            display: inline-block;
            padding: 10px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
        }
        .article-empty a:hover {
            background: var(--primary-dark);
        }

        /* ========== 相关推荐 ========== */
        .related-section {
            padding: var(--section-gap) 0 0;
        }
        .related-section .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .related-section .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--heading-color);
            margin-bottom: 8px;
        }
        .related-section .section-head p {
            font-size: 15px;
            color: var(--text-muted);
        }
        .related-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
            max-width: 900px;
            margin: 0 auto;
        }
        .related-card {
            display: flex;
            align-items: center;
            gap: 28px;
            background: var(--bg-card);
            border-radius: var(--radius-large);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 20px;
            transition: all 0.3s ease;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-thumb {
            width: 220px;
            height: 130px;
            border-radius: 12px;
            overflow: hidden;
            flex-shrink: 0;
            background: #E8EEEB;
        }
        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .related-thumb img {
            transform: scale(1.05);
        }
        .related-body {
            flex: 1;
            min-width: 0;
        }
        .related-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--heading-color);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-body h3 a:hover {
            color: var(--primary);
        }
        .related-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .related-meta .tag {
            background: rgba(11, 110, 90, 0.06);
            color: var(--primary);
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            font-weight: 500;
            font-size: 12px;
        }

        /* ========== 下载CTA ========== */
        .download-cta {
            padding: var(--section-gap) 0;
        }
        .cta-inner {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-large);
            padding: 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 32px;
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: "";
            position: absolute;
            top: -60%;
            right: -20%;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }
        .cta-copy {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 260px;
        }
        .cta-copy h2 {
            color: #fff;
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .cta-copy p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
            margin: 0;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-actions .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 0 32px;
            height: 50px;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            font-size: 15px;
            border-radius: var(--radius-btn);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            transition: all 0.25s;
        }
        .cta-actions .btn-download:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 32px rgba(0, 0, 0, 0.16);
            color: var(--primary-dark);
        }
        .cta-actions .btn-download svg {
            width: 18px;
            height: 18px;
        }
        .cta-actions .btn-alt-download {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 0 32px;
            height: 50px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
            border-radius: var(--radius-btn);
            transition: all 0.25s;
        }
        .cta-actions .btn-alt-download:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-deep);
            color: #C5D6CF;
            padding: 72px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand {
            margin-bottom: 16px;
        }
        .footer-brand .brand-logo {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .footer-brand .brand-name {
            color: #fff;
        }
        .footer-brand p {
            font-size: 14px;
            color: #9FB6AE;
            line-height: 1.7;
            margin-bottom: 16px;
            max-width: 280px;
        }
        .icp {
            font-size: 13px;
            color: #7C9A90;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col a,
        .footer-col p {
            display: block;
            font-size: 14px;
            color: #9FB6AE;
            margin-bottom: 10px;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: #7C9A90;
        }
        .footer-bottom p {
            margin: 0;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1200px) {
            .container {
                padding: 0 20px;
            }
            .search-box {
                width: 150px;
            }
            .search-box:focus-within {
                width: 190px;
            }
        }
        @media (max-width: 992px) {
            .header-inner {
                gap: 12px;
            }
            .main-nav {
                position: fixed;
                top: 72px;
                left: 16px;
                right: 16px;
                background: #fff;
                border-radius: var(--radius-large);
                box-shadow: var(--shadow-hover);
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                gap: 4px;
                opacity: 0;
                visibility: hidden;
                transform: translateY(-10px);
                transition: all 0.3s ease;
                z-index: 999;
                border: 1px solid var(--border-color);
            }
            .main-nav.open {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }
            .main-nav .nav-link {
                padding: 12px 18px;
                font-size: 16px;
            }
            .main-nav .nav-link::after {
                display: none;
            }
            .header-actions {
                gap: 8px;
            }
            .search-box {
                display: none;
            }
            .header-actions .btn-primary {
                padding: 0 18px;
                font-size: 14px;
                height: 42px;
            }
            .nav-toggle {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .related-card {
                flex-direction: row;
                gap: 20px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: 64px;
            }
            .article-card {
                padding: 32px 24px;
                border-radius: 16px;
            }
            .article-header h1 {
                font-size: 26px;
            }
            .article-meta {
                gap: 8px;
            }
            .meta-pill {
                font-size: 12px;
                padding: 5px 10px;
            }
            .article-content {
                font-size: 15px;
            }
            .article-content h2 {
                font-size: 20px;
            }
            .article-content table {
                font-size: 13px;
                display: block;
                overflow-x: auto;
            }
            .related-thumb {
                width: 140px;
                height: 90px;
            }
            .related-body h3 {
                font-size: 16px;
            }
            .related-body p {
                font-size: 13px;
                -webkit-line-clamp: 2;
            }
            .cta-inner {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }
            .cta-actions {
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .pager-link {
                max-width: 100%;
                flex: 1;
            }
        }
        @media (max-width: 576px) {
            .container {
                padding: 0 16px;
            }
            .header-inner {
                height: 64px;
            }
            .site-header {
                height: 64px;
            }
            .brand-name {
                font-size: 15px;
            }
            .brand-logo {
                width: 34px;
                height: 34px;
                border-radius: 10px;
                font-size: 14px;
            }
            .header-actions .btn-primary {
                height: 38px;
                padding: 0 14px;
                font-size: 13px;
            }
            .article-card {
                padding: 24px 16px;
                border-radius: 14px;
            }
            .article-header h1 {
                font-size: 22px;
            }
            .article-content {
                font-size: 14px;
                line-height: 1.85;
            }
            .article-content h2 {
                font-size: 19px;
            }
            .article-content blockquote {
                padding: 16px 18px;
            }
            .article-cover {
                border-radius: 10px;
            }
            .article-cover img {
                aspect-ratio: 16/9;
            }
            .related-card {
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
            }
            .related-thumb {
                width: 100%;
                height: 130px;
            }
            .article-pager {
                flex-direction: column;
                width: 100%;
            }
            .pager-link {
                width: 100%;
            }
            .pager-back {
                width: 100%;
                text-align: center;
            }
            .cta-copy h2 {
                font-size: 22px;
            }
            .cta-actions .btn-download,
            .cta-actions .btn-alt-download {
                width: 100%;
                padding: 0 16px;
                justify-content: center;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .related-section .section-head h2 {
                font-size: 24px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0B6E5A;
            --primary-dark: #09584A;
            --primary-light: #17A07A;
            --accent: #D8963E;
            --bg-page: #F6F8F7;
            --bg-card: #FFFFFF;
            --bg-dark: #0B2E26;
            --heading: #0F241D;
            --text-body: #2C3A35;
            --text-muted: #5B6B66;
            --border-subtle: rgba(11, 110, 90, 0.08);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 8px 30px rgba(11, 110, 90, 0.06);
            --shadow-hover: 0 14px 40px rgba(11, 110, 90, 0.12);
            --shadow-btn: 0 10px 24px rgba(11, 110, 90, 0.25);
            --gradient-brand: 135deg, #0B6E5A, #17A07A;
            --font-stack: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --space-section: 112px;
            --space-section-mobile: 64px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-page);
            color: var(--text-body);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            margin: 0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--heading);
            line-height: 1.4;
            font-weight: 700;
        }

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

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

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

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

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

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

        .section-sm {
            padding: 48px 0;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 48px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 16px;
            border-radius: var(--radius-md);
            height: 50px;
            padding: 0 28px;
            border: none;
            transition: all 0.25s ease;
            font-variant-numeric: tabular-nums;
            line-height: 1;
        }

        .btn-primary {
            background: linear-gradient(var(--gradient-brand));
            color: #fff;
            box-shadow: var(--shadow-btn);
        }

        .btn-primary:hover {
            color: #fff;
            background: linear-gradient(135deg, #0d7a64, #1cb185);
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(11, 110, 90, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 6px 16px rgba(11, 110, 90, 0.22);
        }

        .btn-outline-primary {
            background: transparent;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            height: 48px;
        }

        .btn-outline-primary:hover {
            background: rgba(11, 110, 90, 0.06);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

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

        .btn-lg {
            height: 54px;
            padding: 0 36px;
            font-size: 17px;
        }

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

        /* ===== 焦点 ===== */
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(216, 150, 62, 0.25);
            border-radius: 4px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            background: #FBFCFB;
            border-bottom: 1px solid rgba(11, 110, 90, 0.08);
            box-shadow: 0 2px 8px rgba(11, 110, 90, 0.04);
            position: sticky;
            top: 0;
            z-index: 1030;
            height: 72px;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
        }

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

        .brand-logo {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(var(--gradient-brand));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            letter-spacing: -0.02em;
            box-shadow: 0 4px 12px rgba(11, 110, 90, 0.2);
        }

        .brand-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--heading);
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav .nav-link {
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-pill);
            position: relative;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(11, 110, 90, 0.05);
        }

        .main-nav .nav-link.active {
            background: rgba(11, 110, 90, 0.08);
            color: var(--primary);
            font-weight: 600;
        }

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

        .search-box {
            display: flex;
            align-items: center;
            background: #F2F5F3;
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            width: 180px;
            transition: width 0.3s ease, box-shadow 0.3s ease;
        }

        .search-box:focus-within {
            width: 240px;
            box-shadow: 0 0 0 2px var(--primary), 0 0 12px rgba(11, 110, 90, 0.15);
        }

        .search-box svg {
            width: 16px;
            height: 16px;
            stroke: var(--text-muted);
            flex-shrink: 0;
            margin-right: 8px;
        }

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

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .header-actions .btn {
            height: 44px;
            padding: 0 22px;
            font-size: 15px;
        }

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

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--heading);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle:hover span {
            background: var(--primary);
        }

        @media (max-width: 992px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 72px;
                left: 12px;
                right: 12px;
                background: #fff;
                border-radius: var(--radius-lg);
                box-shadow: var(--shadow-hover);
                padding: 16px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                border: 1px solid var(--border-subtle);
            }

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

            .main-nav .nav-link {
                padding: 14px 16px;
                border-radius: var(--radius-sm);
            }

            .header-actions {
                margin-left: auto;
            }

            .search-box {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

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

        @media (max-width: 576px) {
            .brand-name {
                font-size: 16px;
            }

            .site-header {
                height: 64px;
            }

            .main-nav {
                top: 64px;
            }
        }

        /* ===== Hero ===== */
        .page-hero {
            background: linear-gradient(180deg, rgba(11, 110, 90, 0.05) 0%, rgba(11, 110, 90, 0.02) 100%);
            border-bottom: 1px solid var(--border-subtle);
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: -40%;
            right: -10%;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(11, 110, 90, 0.08) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 18px;
            color: var(--heading);
        }

        .page-hero .hero-lead {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 520px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 28px;
        }

        .hero-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            border-radius: var(--radius-pill);
            padding: 10px 20px;
            border: 1px solid var(--border-subtle);
            box-shadow: 0 4px 14px rgba(11, 110, 90, 0.04);
        }

        .hero-meta .meta-item i {
            color: var(--primary);
            font-size: 16px;
        }

        .hero-meta .meta-item .num {
            font-weight: 700;
            font-size: 16px;
            color: var(--heading);
            font-variant-numeric: tabular-nums;
        }

        .hero-meta .meta-item .label {
            font-size: 13px;
            color: var(--text-muted);
        }

        .hero-visual {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 12px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-subtle);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

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

        .hero-visual .mock-dots {
            display: flex;
            gap: 6px;
            padding: 4px 4px 8px;
        }

        .hero-visual .mock-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            display: inline-block;
        }

        .hero-visual .mock-dots span:nth-child(1) {
            background: #FF5F57;
        }

        .hero-visual .mock-dots span:nth-child(2) {
            background: #FEBC2E;
        }

        .hero-visual .mock-dots span:nth-child(3) {
            background: #28C840;
        }

        .hero-visual img {
            width: 100%;
            border-radius: var(--radius-sm);
            height: 300px;
            object-fit: cover;
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 48px 0 48px;
            }

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

            .hero-visual img {
                height: 200px;
            }
        }

        /* ===== 通用区块标题 ===== */
        .block-head {
            margin-bottom: 48px;
        }

        .block-head .overline {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(11, 110, 90, 0.08);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            letter-spacing: 0.03em;
            margin-bottom: 12px;
        }

        .block-head h2 {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .block-head p {
            color: var(--text-muted);
            max-width: 640px;
        }

        /* ===== 参数表卡 ===== */
        .spec-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            margin-bottom: 24px;
        }

        .spec-card .spec-header {
            padding: 28px 32px;
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            gap: 16px;
            background: linear-gradient(120deg, rgba(11, 110, 90, 0.04), rgba(11, 110, 90, 0.01));
        }

        .spec-card .spec-header .spec-icon {
            width: 44px;
            height: 44px;
            background: linear-gradient(var(--gradient-brand));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
        }

        .spec-card .spec-header h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--heading);
        }

        .spec-card .spec-body {
            padding: 8px 32px 16px;
        }

        .spec-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .spec-list li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 4px;
            border-bottom: 1px solid rgba(11, 110, 90, 0.06);
        }

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

        .spec-list .spec-label {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-muted);
            font-size: 14px;
            flex-shrink: 0;
        }

        .spec-list .spec-label i {
            width: 20px;
            color: var(--primary);
            font-size: 15px;
            text-align: center;
        }

        .spec-list .spec-value {
            font-weight: 600;
            color: var(--heading);
            font-size: 15px;
            text-align: right;
            font-variant-numeric: tabular-nums;
        }

        .spec-list .spec-value strong {
            color: var(--primary);
        }

        @media (max-width: 576px) {
            .spec-card .spec-header,
            .spec-card .spec-body {
                padding-left: 20px;
                padding-right: 20px;
            }

            .spec-list .spec-value {
                font-size: 13px;
            }
        }

        /* ===== 兼容徽章墙 ===== */
        .compat-wall {
            background: var(--bg-dark);
            border-radius: var(--radius-lg);
            padding: 40px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .compat-wall h3 {
            color: #fff;
            font-size: 20px;
            margin-bottom: 12px;
        }

        .compat-wall p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            margin-bottom: 24px;
        }

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

        .compat-badges .badge {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.14);
            padding: 10px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.25s ease;
        }

        .compat-badges .badge i {
            color: var(--accent);
            font-size: 14px;
        }

        .compat-badges .badge:hover {
            background: rgba(255, 255, 255, 0.18);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .compat-wall {
                padding: 32px 24px;
            }
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow 0.25s ease, transform 0.25s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }

        .faq-item .faq-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--heading);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: all 0.25s ease;
            position: relative;
        }

        .faq-item .faq-header::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--accent);
            border-radius: 0 3px 3px 0;
            opacity: 0;
            transition: opacity 0.25s ease;
        }

        .faq-item.active .faq-header::before {
            opacity: 1;
        }

        .faq-item .faq-header .faq-icon {
            color: var(--text-muted);
            font-size: 14px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 16px;
        }

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

        .faq-item .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-body {
            max-height: 400px;
            padding: 0 24px 22px;
        }

        .faq-item .faq-body p {
            font-size: 15px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .faq-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== CTA 横幅 ===== */
        .cta-banner {
            background: linear-gradient(135deg, #0B6E5A 0%, #16A179 100%);
            border-radius: var(--radius-lg);
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::after {
            content: "";
            position: absolute;
            top: -30px;
            right: -20px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-banner h3 {
            color: #fff;
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .cta-banner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            margin: 0;
        }

        .cta-banner .btn-light {
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            border-radius: var(--radius-md);
            height: 50px;
            padding: 0 30px;
            border: none;
            transition: all 0.25s ease;
        }

        .cta-banner .btn-light:hover {
            background: #F2F5F3;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        }

        @media (max-width: 768px) {
            .cta-banner {
                flex-direction: column;
                align-items: flex-start;
                padding: 36px 28px;
            }

            .cta-banner h3 {
                font-size: 22px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 64px 0 0;
            margin-top: 0;
        }

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

        .site-footer .brand-logo {
            background: rgba(255, 255, 255, 0.12);
            box-shadow: none;
        }

        .site-footer .brand-name {
            color: #fff;
        }

        .site-footer p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .site-footer .icp {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .site-footer .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }

        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            padding: 6px 0;
            transition: color 0.2s ease;
        }

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

        .site-footer .footer-col p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            padding: 4px 0;
        }

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

        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===== 下载引导 ===== */
        .download-guide {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            padding: 40px;
        }

        .download-guide .version-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 24px;
        }

        .download-guide .version-meta .badge {
            background: rgba(11, 110, 90, 0.06);
            color: var(--heading);
            font-weight: 500;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-subtle);
        }

        .download-guide .version-meta .badge strong {
            color: var(--primary);
            font-weight: 700;
        }

        .download-guide .btn {
            min-width: 160px;
        }

        @media (max-width: 768px) {
            .download-guide {
                padding: 32px 24px;
            }

            .download-guide .btn {
                width: 100%;
                justify-content: center;
                margin-bottom: 12px;
            }
        }

        /* ===== 兼容说明行 ===== */
        .compatibility-note {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 14px;
            line-height: 1.6;
        }

        /* ===== 深色分隔带 ===== */
        .dark-band {
            background: var(--bg-dark);
            color: #fff;
        }

        .dark-band .block-head h2 {
            color: #fff;
        }

        .dark-band .block-head p {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== 区块间距调整 ===== */
        .section-tight {
            padding: 32px 0;
        }

        @media (max-width: 576px) {
            .section {
                padding: var(--space-section-mobile) 0;
            }

            .section-title {
                font-size: 24px;
            }

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

/* roulang page: category3 */
:root {
  --primary: #0B6E5A;
  --primary-dark: #09584A;
  --primary-light: #17A07A;
  --accent: #D8963E;
  --bg: #F6F8F7;
  --surface: #FFFFFF;
  --dark: #0B2E26;
  --text: #0F241D;
  --text-body: #2C3A35;
  --text-muted: #5B6B66;
  --border: rgba(11, 110, 90, 0.08);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --shadow: 0 8px 30px rgba(11, 110, 90, 0.06);
  --shadow-hover: 0 14px 40px rgba(11, 110, 90, 0.12);
  --transition: all 0.25s ease;
  --section-space: 112px;
  --gradient: linear-gradient(135deg, #0B6E5A, #17A07A);
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

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

input {
  font-family: inherit;
  border: none;
  outline: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
  box-shadow: 0 0 0 4px rgba(216, 150, 62, 0.2);
}

/* =================== Header =================== */
.site-header {
  background: #FBFCFB;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 12px rgba(11, 110, 90, 0.04);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
}

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

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

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.5px;
  font-variant-numeric: tabular-nums;
}

.brand-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  padding: 6px 0;
  position: relative;
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

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

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(11, 110, 90, 0.08);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #F2F5F3;
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  width: 180px;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.search-box:focus-within {
  width: 240px;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(11, 110, 90, 0.08);
}

.search-box svg {
  width: 16px;
  height: 16px;
  stroke: var(--text-muted);
  flex-shrink: 0;
}

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

.search-box input::placeholder {
  color: #8FA39A;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(11, 110, 90, 0.06);
  padding: 0;
}

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

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

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

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

/* =================== Buttons =================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  border: none;
  height: 48px;
  padding: 0 28px;
  box-shadow: 0 4px 12px rgba(11, 110, 90, 0.2);
}

.btn-primary:hover {
  filter: brightness(1.06);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(11, 110, 90, 0.25);
  color: #fff;
}

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

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  height: 48px;
  padding: 0 24px;
}

.btn-outline:hover {
  background: rgba(11, 110, 90, 0.06);
  color: var(--primary);
}

.btn-lg {
  height: 52px;
  padding: 0 36px;
  font-size: 15px;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* =================== Page Banner =================== */
.page-banner {
  background: linear-gradient(180deg, rgba(11, 110, 90, 0.08), rgba(246, 248, 247, 0)),
    url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  padding: 72px 0 64px;
  position: relative;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(11, 110, 90, 0.04);
  pointer-events: none;
}

.banner-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.breadcrumb-bar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 6px 18px;
  margin-bottom: 24px;
}

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

.breadcrumb-bar a:hover {
  text-decoration: underline;
}

.page-banner h1 {
  font-size: 40px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 16px;
}

.page-banner .banner-subtitle {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 0;
}

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

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 72px;
}

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

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

.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  transition: transform 0.4s ease;
}

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

.feature-content {
  max-width: 440px;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(11, 110, 90, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

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

.feature-content ul {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}

.feature-content ul li {
  font-size: 15px;
  color: var(--text-body);
  padding-left: 20px;
  position: relative;
  margin-bottom: 10px;
  line-height: 1.6;
}

.feature-content ul li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--accent);
  font-size: 20px;
  line-height: 1;
}

.feature-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(216, 150, 62, 0.12);
  border: 1px solid rgba(216, 150, 62, 0.2);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.feature-badge strong {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.3px;
}

/* =================== Spec Section =================== */
.spec-section {
  padding: 0 0 var(--section-space);
}

.spec-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 48px;
}

.spec-heading {
  text-align: center;
  margin-bottom: 40px;
}

.spec-heading h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.spec-heading p {
  font-size: 15px;
  color: var(--text-muted);
}

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

.spec-group {
  background: var(--bg);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  border: 1px solid var(--border);
}

.spec-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
}

.spec-group-title svg {
  width: 20px;
  height: 20px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.spec-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.spec-group ul li {
  font-size: 14px;
  color: var(--text-body);
  padding: 8px 0;
  padding-left: 16px;
  position: relative;
  border-bottom: 1px dashed rgba(11, 110, 90, 0.08);
}

.spec-group ul li:last-child {
  border-bottom: none;
}

.spec-group ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  transform: translateY(-50%);
}

.spec-note {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 24px;
  background: rgba(11, 110, 90, 0.04);
  border-radius: var(--radius-pill);
  padding: 10px 20px;
  display: inline-block;
  width: 100%;
}

/* =================== CTA Banner =================== */
.cta-section {
  padding: 0 0 var(--section-space);
}

.cta-banner {
  background: var(--gradient);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  box-shadow: 0 16px 40px rgba(11, 110, 90, 0.18);
  position: relative;
  overflow: hidden;
}

.cta-banner::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.cta-text {
  flex: 1;
  min-width: 260px;
  position: relative;
  z-index: 1;
}

.cta-text h2 {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.4;
}

.cta-text p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
}

.cta-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.cta-actions .btn-outline {
  border-color: #fff;
  color: #fff;
}

.cta-actions .btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

/* =================== Footer =================== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 64px 0 0;
}

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

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

.footer-brand .brand-logo {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.footer-brand .brand-name {
  color: #fff;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 16px;
  max-width: 280px;
}

.footer-brand .icp {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer-col a,
.footer-col p {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 12px;
  line-height: 1.6;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
  font-variant-numeric: tabular-nums;
}

/* =================== Responsive =================== */
@media (max-width: 1199.98px) {
  .container {
    padding: 0 20px;
  }

  .feature-row {
    gap: 40px;
  }
}

@media (max-width: 991.98px) {
  .site-header {
    height: 64px;
  }

  .header-inner {
    height: 64px;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 64px;
    left: 20px;
    right: 20px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 16px 40px rgba(11, 110, 90, 0.14);
    border: 1px solid var(--border);
    padding: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

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

  .nav-link {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 15px;
  }

  .nav-link:hover {
    background: rgba(11, 110, 90, 0.04);
  }

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

  .nav-link.active {
    background: rgba(11, 110, 90, 0.1);
    padding: 12px 16px;
  }

  .header-actions {
    margin-left: auto;
  }

  .search-box {
    width: 44px;
    padding: 8px;
    justify-content: center;
  }

  .search-box input {
    display: none;
  }

  .search-box:focus-within {
    width: 44px;
  }

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

  .page-banner {
    padding: 56px 0 48px;
  }

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

  .feature-section,
  .spec-section,
  .cta-section {
    --section-space: 64px;
  }

  .feature-row {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 56px;
  }

  .feature-media img {
    max-height: 360px;
  }

  .feature-content {
    max-width: 100%;
  }

  .spec-card {
    padding: 32px 20px;
  }

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

  .cta-banner {
    padding: 36px 28px;
    flex-direction: column;
    text-align: center;
  }

  .cta-actions {
    justify-content: center;
  }

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

@media (max-width: 767.98px) {
  .container {
    padding: 0 16px;
  }

  .brand-name {
    font-size: 14px;
  }

  .page-banner {
    padding: 40px 0 36px;
  }

  .page-banner h1 {
    font-size: 28px;
  }

  .page-banner .banner-subtitle {
    font-size: 15px;
  }

  .breadcrumb-bar {
    font-size: 12px;
    padding: 5px 14px;
  }

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

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

  .feature-badge {
    font-size: 12px;
    padding: 6px 14px;
  }

  .feature-badge strong {
    font-size: 16px;
  }

  .spec-card {
    padding: 24px 16px;
    box-shadow: none;
    border-radius: 16px;
  }

  .spec-heading h2 {
    font-size: 24px;
  }

  .cta-banner {
    border-radius: 16px;
    padding: 28px 20px;
  }

  .cta-text h2 {
    font-size: 20px;
  }

  .btn-lg {
    height: 48px;
    padding: 0 24px;
    font-size: 14px;
  }

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

  .footer-col h4 {
    margin-bottom: 12px;
  }
}

@media (max-width: 575.98px) {
  .card {
    border-radius: 16px;
  }

  .feature-media {
    border-radius: 16px;
  }

  .feature-media img {
    border-radius: 16px;
  }

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

  .header-actions {
    gap: 8px;
  }
}