/* roulang page: index */
:root {
  --primary: #00d26a;
  --primary-dark: #00b85a;
  --primary-light: #eafbf2;
  --dark: #0e2b1f;
  --orange: #ff6b2c;
  --bg: #f6f8f7;
  --card: #ffffff;
  --border: #e8efeb;
  --text: #3f4a45;
  --text-light: #98a6a0;
  --radius: 16px;
  --radius-btn: 999px;
  --shadow: 0 8px 30px rgba(14, 43, 31, 0.08);
  --shadow-hover: 0 14px 40px rgba(0, 210, 106, 0.18);
  --transition: 0.3s ease;
  --container: 1280px;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
button,
input,
select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
  border: none;
  background: none;
}
ul,
ol {
  list-style: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 210, 106, 0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-outline {
  background: transparent;
  color: var(--dark);
  border: 1.5px solid var(--dark);
}
.btn-outline:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-dark);
  transform: translateY(-2px);
}
.btn-outline:active {
  transform: scale(0.98);
}
.btn-lg {
  height: 52px;
  padding: 0 36px;
  font-size: 16px;
}
.btn-sm {
  height: 38px;
  padding: 0 20px;
  font-size: 14px;
}
.btn-block {
  width: 100%;
}
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
  background: var(--primary-light);
  color: var(--primary-dark);
}
.badge-green {
  background: var(--primary);
  color: #fff;
}
.badge-orange {
  background: rgba(255, 107, 44, 0.12);
  color: var(--orange);
}
/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 64px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(14, 43, 31, 0.05);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 19px;
  font-weight: 800;
  box-shadow: 0 3px 10px rgba(0, 210, 106, 0.35);
}
.brand-text {
  font-size: 18px;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: 0.3px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 4px 2px;
  transition: color var(--transition);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition);
}
.nav-link:hover {
  color: var(--dark);
}
.nav-link:hover::after {
  width: 100%;
}
.nav-link.active {
  color: var(--dark);
  font-weight: 600;
}
.nav-link.active::after {
  width: 100%;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.search-form {
  display: flex;
  align-items: center;
  height: 38px;
  background: #f2f5f3;
  border-radius: var(--radius-btn);
  padding: 0 6px 0 16px;
  border: 2px solid transparent;
  transition: border-color var(--transition);
}
.search-form:focus-within {
  border-color: var(--primary);
}
.search-form input {
  width: 170px;
  font-size: 14px;
  color: var(--text);
  background: transparent;
}
.search-form input::placeholder {
  color: var(--text-light);
}
.search-form button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  color: var(--text-light);
  cursor: pointer;
  transition: all var(--transition);
}
.search-form button:hover {
  color: var(--primary-dark);
  background: var(--primary-light);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: all var(--transition);
}
.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);
}
/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(14, 43, 31, 0.95) 0%, rgba(14, 43, 31, 0.6) 50%, rgba(14, 43, 31, 0.2) 100%);
  z-index: 1;
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  padding-top: 80px;
  padding-bottom: 80px;
}
.hero-content {
  flex: 1;
  max-width: 620px;
}
.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-btn);
  background: rgba(0, 210, 106, 0.2);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 20px;
  border: 1px solid rgba(0, 210, 106, 0.3);
}
.hero h1 {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.hero-subtitle {
  font-size: 22px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: 4px;
}
.hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 30px;
  max-width: 520px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.hero-actions .btn-outline {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
}
.hero-actions .btn-outline:hover {
  background: rgba(0, 210, 106, 0.15);
  border-color: var(--primary);
  color: var(--primary);
}
.hero-features {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.hero-features li {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}
.hero-features i {
  color: var(--primary);
  font-size: 15px;
}
.hero-visual {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.phone-glow {
  position: absolute;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(0, 210, 106, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}
.phone-mockup {
  position: relative;
  z-index: 1;
  width: 270px;
  height: 540px;
  background: #0e2b1f;
  border-radius: 38px;
  border: 5px solid #1a3a2b;
  padding: 12px;
  box-shadow: 0 32px 64px rgba(0, 0, 0, 0.4);
}
.phone-mockup img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 28px;
}
.phone-notch {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 22px;
  background: #0e2b1f;
  border-radius: 12px;
  z-index: 2;
}
/* ========== Section Common ========== */
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}
.section-tag {
  display: inline-block;
  padding: 5px 16px;
  border-radius: var(--radius-btn);
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--dark);
  margin-bottom: 12px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.7;
}
section {
  padding: 96px 0;
}
/* ========== Pain Points ========== */
.pain-points {
  background: var(--bg);
}
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.pain-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 40px 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  text-align: center;
  transition: all var(--transition);
}
.pain-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.pain-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 24px;
  font-weight: 800;
}
.pain-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
}
.pain-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-light);
}
/* ========== Solutions ========== */
.solutions {
  background: #fff;
}
.solution-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}
.solution-card {
  display: flex;
  align-items: center;
  gap: 28px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 36px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  cursor: pointer;
}
.solution-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.solution-card:hover .solution-arrow {
  transform: translateX(8px);
  color: var(--orange);
}
.solution-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 22px;
  flex-shrink: 0;
  transition: all var(--transition);
}
.solution-card:hover .solution-icon {
  background: var(--primary);
  color: #fff;
}
.solution-body {
  flex: 1;
}
.solution-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}
.solution-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-light);
}
.solution-arrow {
  font-size: 20px;
  color: var(--text-light);
  transition: all var(--transition);
  flex-shrink: 0;
}
.solution-cta {
  text-align: center;
  margin-top: 44px;
}
/* ========== Stats ========== */
.stats {
  background: var(--dark);
  position: relative;
  overflow: hidden;
  padding: 72px 0;
}
.stats::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
.stats-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.stat-item {
  text-align: center;
}
.stat-num {
  display: block;
  font-size: 52px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  margin-bottom: 8px;
  font-family: "DIN Alternate", "Barlow Condensed", sans-serif;
  letter-spacing: -1px;
}
.stat-num span {
  font-size: 24px;
  font-weight: 700;
}
.stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
}
/* ========== News ========== */
.news-section {
  background: var(--bg);
}
.news-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 32px;
  align-items: start;
}
.news-featured .featured-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all var(--transition);
}
.news-featured .featured-card:hover {
  box-shadow: var(--shadow-hover);
}
.featured-img {
  height: 280px;
  overflow: hidden;
}
.featured-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.featured-card:hover .featured-img img {
  transform: scale(1.04);
}
.featured-body {
  padding: 28px 30px;
}
.featured-body .badge {
  margin-bottom: 12px;
}
.featured-body h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
  line-height: 1.4;
}
.featured-body p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-light);
  margin-bottom: 16px;
}
.featured-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-dark);
  transition: all var(--transition);
}
.featured-link i {
  transition: transform var(--transition);
}
.featured-link:hover {
  color: var(--primary-dark);
}
.featured-link:hover i {
  transform: translateX(4px);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  transition: all var(--transition);
}
.news-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.news-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.news-item-top time {
  font-size: 13px;
  color: var(--text-light);
}
.news-item h4 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 6px;
}
.news-item h4 a {
  color: var(--dark);
}
.news-item h4 a:hover {
  color: var(--primary-dark);
}
.news-item p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-light);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-dark);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-link i {
  font-size: 12px;
  transition: transform var(--transition);
}
.news-link:hover i {
  transform: translateX(4px);
}
.empty-state {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 48px 24px;
  text-align: center;
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.5);
}
.empty-state p {
  font-size: 15px;
}
/* ========== CTA ========== */
.cta-section {
  background: #fff;
}
.cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: var(--dark);
  border-radius: 20px;
  padding: 48px 56px;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(0, 210, 106, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}
.cta-content {
  position: relative;
  z-index: 1;
}
.cta-content h2 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.cta-content p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
}
.cta-card .btn {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
/* ========== FAQ ========== */
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 56px;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  cursor: pointer;
  text-align: left;
  gap: 16px;
}
.faq-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 14px;
  flex-shrink: 0;
  transition: all var(--transition);
}
.faq-item.active .faq-toggle {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 24px;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 24px;
}
.faq-answer p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-light);
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
/* ========== Footer ========== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.8);
  padding-top: 72px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 19px;
  font-weight: 800;
}
.footer-brand .logo-text {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 360px;
}
.footer-links h4,
.footer-guide h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: all var(--transition);
}
.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-guide p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 18px;
}
.footer-guide .btn-primary {
  height: 40px;
  padding: 0 24px;
  font-size: 14px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}
/* ========== Modal ========== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s ease;
}
.modal.open {
  opacity: 1;
  visibility: visible;
}
.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(14, 43, 31, 0.55);
  backdrop-filter: blur(2px);
  cursor: pointer;
}
.modal-card {
  position: relative;
  width: 100%;
  max-width: 460px;
  background: #fff;
  border-radius: 20px;
  padding: 36px 32px;
  box-shadow: 0 32px 64px rgba(14, 43, 31, 0.25);
  transform: translateY(30px) scale(0.96);
  transition: all 0.35s ease;
  margin: 20px;
}
.modal.open .modal-card {
  transform: translateY(0) scale(1);
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg);
}
.modal-close:hover {
  background: #ffefee;
  color: var(--orange);
}
.modal-head {
  text-align: center;
  margin-bottom: 28px;
}
.modal-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 22px;
}
.modal-head h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}
.modal-head p {
  font-size: 14px;
  color: var(--text-light);
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 6px;
}
.form-group input,
.form-group select {
  width: 100%;
  height: 46px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0 16px;
  font-size: 14px;
  color: var(--text);
  background: #fafbfa;
  transition: all var(--transition);
}
.form-group input:focus,
.form-group select:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 210, 106, 0.12);
}
.form-group input::placeholder {
  color: var(--text-light);
}
.privacy-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-light);
  margin-top: 14px;
}
.privacy-note i {
  font-size: 12px;
}
/* ========== Toast ========== */
.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--dark);
  color: #fff;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  z-index: 3000;
  box-shadow: 0 16px 40px rgba(14, 43, 31, 0.3);
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.toast i {
  color: var(--primary);
}
/* ========== Back to Top ========== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--dark);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 999;
}
.back-to-top.show {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
}
/* ========== Responsive ========== */
@media (max-width: 1200px) {
  .hero h1 {
    font-size: 40px;
  }
  .stat-num {
    font-size: 44px;
  }
}
@media (max-width: 991px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 16px;
    box-shadow: 0 20px 40px rgba(14, 43, 31, 0.1);
    border-bottom: 1px solid var(--border);
  }
  .main-nav.active {
    display: flex;
  }
  .nav-link {
    width: 100%;
    padding: 8px 0;
    font-size: 16px;
  }
  .nav-link::after {
    display: none;
  }
  .nav-link.active {
    color: var(--primary-dark);
  }
  .nav-toggle {
    display: flex;
  }
  .search-form {
    display: none;
  }
  .hero-inner {
    flex-direction: column;
    text-align: center;
    gap: 40px;
  }
  .hero-content {
    max-width: 100%;
  }
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-features {
    justify-content: center;
  }
  .hero-visual {
    display: none;
  }
  .hero {
    min-height: 560px;
  }
  .hero h1 {
    font-size: 36px;
  }
  .pain-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .featured-img {
    height: 220px;
  }
  .stats-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .cta-card {
    flex-direction: column;
    text-align: center;
    padding: 40px 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}
@media (max-width: 767px) {
  section {
    padding: 56px 0;
  }
  .container {
    padding: 0 20px;
  }
  .brand-text {
    font-size: 16px;
  }
  .header-inner {
    gap: 12px;
  }
  .header-actions .btn-sm {
    padding: 0 14px;
    font-size: 13px;
    height: 34px;
  }
  .hero {
    min-height: auto;
    padding: 60px 0;
  }
  .hero-inner {
    padding: 0;
  }
  .hero h1 {
    font-size: 30px;
    line-height: 1.3;
  }
  .hero-subtitle {
    font-size: 18px;
    letter-spacing: 2px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .section-head p {
    font-size: 15px;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .pain-card {
    padding: 28px 24px;
  }
  .solution-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
  }
  .solution-arrow {
    position: absolute;
    right: 20px;
    top: 24px;
  }
  .solution-card {
    position: relative;
    padding-right: 60px;
  }
  .stat-num {
    font-size: 36px;
  }
  .stat-label {
    font-size: 13px;
  }
  .news-grid {
    gap: 24px;
  }
  .featured-body {
    padding: 20px;
  }
  .featured-body h3 {
    font-size: 18px;
  }
  .featured-img {
    height: 180px;
  }
  .news-item {
    padding: 16px 18px;
  }
  .cta-card {
    padding: 32px 24px;
  }
  .cta-content h2 {
    font-size: 22px;
  }
  .cta-card .btn {
    width: 100%;
  }
  .faq-question {
    font-size: 14px;
    padding: 14px 18px;
  }
  .faq-answer {
    padding: 0 18px;
  }
  .modal-card {
    padding: 28px 20px;
  }
  .footer-grid {
    gap: 32px;
  }
  .footer-bottom p {
    font-size: 12px;
  }
  .back-to-top {
    bottom: 20px;
    right: 20px;
  }
}
@media (max-width: 400px) {
  .brand-text {
    font-size: 14px;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }
  .hero h1 {
    font-size: 26px;
  }
  .stat-num {
    font-size: 30px;
  }
}

/* roulang page: category1 */
:root {
      --primary: #00D26A;
      --primary-hover: #00B85A;
      --primary-light: #EAFBF2;
      --dark: #0E2B1F;
      --accent: #FF6B2C;
      --bg: #F6F8F7;
      --card: #FFFFFF;
      --border: #E8EFEB;
      --text: #3F4A45;
      --text-light: #98A6A0;
      --radius: 16px;
      --radius-sm: 12px;
      --shadow: 0 8px 30px rgba(14, 43, 31, 0.08);
      --shadow-hover: 0 14px 40px rgba(0, 210, 106, 0.18);
      --container: 1280px;
      --section-space: 96px;
      --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-family);
      background: var(--bg);
      color: var(--text);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color .25s ease;
    }
    img {
      max-width: 100%;
      display: block;
    }
    ul,
    ol {
      list-style: none;
    }
    button,
    input,
    select {
      font-family: inherit;
      font-size: inherit;
      border: none;
      outline: none;
      background: none;
    }
    button {
      cursor: pointer;
    }
    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: #ffffff;
      border-bottom: 1px solid var(--border);
      box-shadow: 0 4px 20px rgba(14, 43, 31, 0.04);
      height: 64px;
    }
    .header-inner {
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand-icon,
    .logo-icon {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-size: 20px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .brand-text {
      font-size: 19px;
      font-weight: 800;
      color: var(--dark);
      letter-spacing: .5px;
      white-space: nowrap;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .nav-link {
      padding: 8px 16px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      border-radius: 999px;
      position: relative;
      transition: color .25s ease, background .25s ease;
    }
    .nav-link:hover {
      color: var(--dark);
      background: var(--primary-light);
    }
    .nav-link.active {
      color: var(--dark);
    }
    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 2px;
      height: 3px;
      border-radius: 999px;
      background: var(--primary);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-shrink: 0;
    }
    .search-form {
      display: flex;
      align-items: center;
      background: #F2F5F3;
      border-radius: 999px;
      height: 38px;
      padding: 0 6px 0 16px;
      border: 2px solid transparent;
      transition: border-color .25s ease, box-shadow .25s ease;
      width: 220px;
    }
    .search-form:focus-within {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 210, 106, 0.15);
    }
    .search-form input {
      flex: 1;
      background: transparent;
      color: var(--text);
      font-size: 14px;
    }
    .search-form input::placeholder {
      color: var(--text-light);
    }
    .search-form button {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: transparent;
      color: var(--text-light);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: color .25s ease, background .25s ease;
    }
    .search-form button:hover {
      color: var(--primary);
      background: rgba(0, 210, 106, 0.12);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 46px;
      padding: 0 28px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      background: var(--primary);
      border: 1.5px solid transparent;
      transition: all .25s ease;
      user-select: none;
      white-space: nowrap;
    }
    .btn:hover {
      background: var(--primary-hover);
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    .btn:active {
      transform: scale(0.98);
    }
    .btn-sm {
      height: 38px;
      padding: 0 20px;
      font-size: 14px;
    }
    .btn-outline-light {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.7);
      color: #fff;
    }
    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: #fff;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    }
    .nav-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 40px;
      height: 40px;
      border-radius: 8px;
      padding: 8px;
      background: transparent;
      border: 1px solid var(--border);
    }
    .nav-toggle span {
      display: block;
      height: 2px;
      border-radius: 2px;
      background: var(--dark);
      transition: transform .3s ease, opacity .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);
    }
    .hero {
      position: relative;
      min-height: 580px;
      display: flex;
      align-items: center;
      overflow: hidden;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(14, 43, 31, 0.92) 0%, rgba(14, 43, 31, 0.62) 55%, rgba(14, 43, 31, 0.25) 100%);
    }
    .hero-inner {
      position: relative;
      z-index: 2;
      padding-top: 88px;
      padding-bottom: 88px;
      max-width: var(--container);
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(0, 210, 106, 0.16);
      border: 1px solid rgba(0, 210, 106, 0.45);
      color: #7dffb5;
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 18px;
      letter-spacing: 1px;
    }
    .hero h1 {
      font-size: 46px;
      line-height: 1.1;
      font-weight: 800;
      color: #fff;
      max-width: 680px;
      letter-spacing: 1px;
    }
    .hero-sub {
      font-size: 18px;
      color: rgba(255, 255, 255, 0.72);
      margin-top: 10px;
      letter-spacing: 4px;
      font-weight: 600;
    }
    .hero-desc {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.86);
      margin-top: 16px;
      max-width: 560px;
      line-height: 1.8;
    }
    .hero-actions {
      display: flex;
      gap: 14px;
      margin-top: 32px;
      flex-wrap: wrap;
    }
    .hero-mark {
      margin-top: 26px;
      display: flex;
      align-items: center;
      gap: 18px;
      color: rgba(255, 255, 255, 0.65);
      font-size: 13px;
    }
    .hero-mark i {
      color: var(--primary);
      margin-right: 4px;
    }
    .section {
      padding-top: var(--section-space);
      padding-bottom: var(--section-space);
    }
    .section-bg {
      background: var(--card);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 5px 14px;
      border-radius: 6px;
      letter-spacing: 1px;
      margin-bottom: 12px;
    }
    .section-head h2 {
      font-size: 32px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 12px;
    }
    .section-head p {
      color: var(--text-light);
      font-size: 16px;
    }
    .guide-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 960px;
      margin: 0 auto;
    }
    .guide-card {
      display: flex;
      align-items: center;
      gap: 20px;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px 28px;
      box-shadow: var(--shadow);
      transition: all .3s ease;
    }
    .guide-card:hover {
      transform: translateY(-3px);
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
    }
    .guide-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 22px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .guide-info {
      flex: 1;
    }
    .guide-info h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 4px;
    }
    .guide-info p {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.6;
    }
    .guide-arrow {
      color: var(--accent);
      font-size: 20px;
      transition: transform .3s ease;
      flex-shrink: 0;
    }
    .guide-card:hover .guide-arrow {
      transform: translateX(8px);
    }
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pain-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 36px 28px 28px;
      box-shadow: var(--shadow);
      transition: all .3s ease;
      text-align: left;
      position: relative;
    }
    .pain-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }
    .pain-icon {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-size: 20px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }
    .pain-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .pain-card p {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.7;
    }
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .steps::before {
      content: "";
      position: absolute;
      top: 44px;
      left: 12%;
      right: 12%;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), var(--primary-light));
      z-index: 0;
    }
    .step {
      position: relative;
      z-index: 1;
      text-align: center;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 20px 24px;
      box-shadow: var(--shadow);
      transition: all .3s ease;
    }
    .step:hover {
      transform: translateY(-4px);
      border-color: var(--primary);
    }
    .step-num {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-size: 18px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px;
      box-shadow: 0 0 0 6px rgba(0, 210, 106, 0.15);
    }
    .step h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 6px;
    }
    .step p {
      font-size: 13px;
      color: var(--text-light);
      line-height: 1.6;
    }
    .stats-section {
      background: var(--dark);
      position: relative;
      overflow: hidden;
      padding-top: 80px;
      padding-bottom: 80px;
    }
    .stats-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
      background-size: 44px 44px;
    }
    .stats-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .stat-num {
      font-size: 44px;
      font-weight: 800;
      color: var(--primary);
      font-family: "Barlow Condensed", "DIN Alternate", sans-serif;
      letter-spacing: 1px;
      line-height: 1.2;
    }
    .stat-label {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.6);
      margin-top: 8px;
      letter-spacing: 1px;
    }
    .device-wrap {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 48px;
      align-items: center;
      max-width: 1080px;
      margin: 0 auto;
    }
    .device-content .section-tag {
      margin-bottom: 14px;
    }
    .device-content h2 {
      font-size: 32px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
    }
    .device-content p {
      color: var(--text-light);
      font-size: 15px;
      margin-bottom: 20px;
    }
    .device-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .device-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 15px;
      color: var(--text);
    }
    .device-list i {
      color: var(--primary);
      margin-top: 4px;
    }
    .device-media {
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      border: 1px solid var(--border);
    }
    .device-media img {
      width: 100%;
      height: 360px;
      object-fit: cover;
      transition: transform .5s ease;
    }
    .device-media:hover img {
      transform: scale(1.03);
    }
    .faq-section {
      background: var(--card);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .faq-list {
      max-width: 840px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: border-color .3s ease, box-shadow .3s ease;
    }
    .faq-item.active {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 210, 106, 0.1);
    }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      width: 100%;
      padding: 0 24px;
      height: 56px;
      font-size: 15px;
      font-weight: 600;
      color: var(--dark);
      text-align: left;
      background: transparent;
    }
    .faq-icon {
      font-size: 22px;
      color: var(--primary);
      transition: transform .3s ease;
      flex-shrink: 0;
      line-height: 1;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .35s ease;
    }
    .faq-answer-inner {
      padding: 0 24px 24px;
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.8;
      border-top: 1px dashed var(--border);
      padding-top: 16px;
    }
    .cta-section {
      position: relative;
      padding-top: 96px;
      padding-bottom: 96px;
      background-size: cover;
      background-position: center;
    }
    .cta-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(14, 43, 31, 0.94), rgba(14, 43, 31, 0.75));
    }
    .cta-inner {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 680px;
      margin: 0 auto;
    }
    .cta-inner h2 {
      font-size: 34px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
    }
    .cta-inner p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.78);
      margin-bottom: 28px;
    }
    .site-footer {
      background: var(--dark);
      padding: 64px 0 32px;
      color: rgba(255, 255, 255, 0.7);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      margin-top: 14px;
      color: rgba(255, 255, 255, 0.6);
    }
    .footer-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .logo-text {
      font-size: 18px;
      font-weight: 800;
      color: #fff;
      letter-spacing: .5px;
    }
    .footer-links h4,
    .footer-guide h4 {
      font-size: 15px;
      color: #fff;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-links ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.6);
      transition: color .25s ease;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-guide p {
      font-size: 14px;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.6);
      margin-bottom: 14px;
    }
    .footer-bottom {
      padding-top: 28px;
      text-align: center;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.4);
    }
    .modal-mask {
      position: fixed;
      inset: 0;
      z-index: 999;
      background: rgba(14, 43, 31, 0.5);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
      opacity: 0;
      visibility: hidden;
      transition: opacity .3s ease, visibility .3s ease;
    }
    .modal-mask.active {
      opacity: 1;
      visibility: visible;
    }
    .modal-card {
      background: #fff;
      border-radius: 20px;
      max-width: 460px;
      width: 100%;
      padding: 32px;
      box-shadow: 0 24px 80px rgba(14, 43, 31, 0.2);
      transform: translateY(16px);
      transition: transform .3s ease;
      position: relative;
    }
    .modal-mask.active .modal-card {
      transform: translateY(0);
    }
    .modal-close {
      position: absolute;
      top: 14px;
      right: 14px;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      font-size: 16px;
      color: var(--text-light);
      background: var(--bg);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all .25s ease;
    }
    .modal-close:hover {
      background: #f0f0f0;
      color: var(--text);
    }
    .modal-card h3 {
      font-size: 22px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 6px;
    }
    .modal-card .modal-sub {
      font-size: 14px;
      color: var(--text-light);
      margin-bottom: 20px;
    }
    .modal-card form {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .modal-card input,
    .modal-card select {
      width: 100%;
      height: 46px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      padding: 0 16px;
      font-size: 14px;
      color: var(--text);
      background: #fff;
      transition: border-color .25s ease, box-shadow .25s ease;
    }
    .modal-card input:focus,
    .modal-card select:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 210, 106, 0.12);
    }
    .modal-card select {
      appearance: auto;
      cursor: pointer;
    }
    .modal-card .btn {
      width: 100%;
      margin-top: 6px;
    }
    .privacy-note {
      font-size: 12px;
      color: var(--text-light);
      margin-top: 14px;
      text-align: center;
      line-height: 1.6;
    }
    .privacy-note i {
      margin-right: 4px;
    }
    .back-top {
      position: fixed;
      bottom: 32px;
      right: 32px;
      z-index: 90;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--dark);
      color: #fff;
      font-size: 18px;
      box-shadow: var(--shadow);
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      visibility: hidden;
      transform: translateY(12px);
      transition: all .3s ease;
    }
    .back-top.show {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .back-top:hover {
      background: var(--primary);
    }
    @media (max-width: 1199px) {
      .container {
        padding-left: 32px;
        padding-right: 32px;
      }
      .pain-grid {
        gap: 16px;
      }
      .guide-list {
        max-width: 100%;
      }
    }
    @media (max-width: 991px) {
      .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 16px 40px rgba(14, 43, 31, 0.08);
        transform: translateY(-120%);
        transition: transform .35s ease;
        z-index: 99;
      }
      .main-nav.open {
        transform: translateY(0);
      }
      .main-nav .nav-link {
        padding: 14px 16px;
        text-align: center;
        font-size: 16px;
      }
      .nav-link.active::after {
        display: none;
      }
      .nav-link.active {
        background: var(--primary-light);
        color: var(--primary);
      }
      .nav-toggle {
        display: flex;
      }
      .pain-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .steps::before {
        display: none;
      }
      .device-wrap {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
      }
    }
    @media (max-width: 767px) {
      :root {
        --section-space: 56px;
      }
      .container {
        padding-left: 20px;
        padding-right: 20px;
      }
      .site-header {
        height: 60px;
      }
      .header-inner {
        height: 60px;
        gap: 12px;
      }
      .brand-text {
        font-size: 16px;
      }
      .brand-icon {
        width: 34px;
        height: 34px;
        font-size: 17px;
      }
      .search-form {
        display: none;
      }
      .header-actions .btn-sm {
        height: 36px;
        padding: 0 16px;
        font-size: 13px;
      }
      .hero {
        min-height: 480px;
      }
      .hero-inner {
        padding-top: 64px;
        padding-bottom: 56px;
        text-align: center;
      }
      .hero h1 {
        font-size: 32px;
        line-height: 1.3;
      }
      .hero-sub {
        font-size: 15px;
        letter-spacing: 2px;
      }
      .hero-desc {
        font-size: 15px;
        margin-left: auto;
        margin-right: auto;
      }
      .hero-actions {
        justify-content: center;
        flex-direction: column;
      }
      .hero-actions .btn {
        width: 100%;
      }
      .hero-mark {
        justify-content: center;
        flex-wrap: wrap;
        gap: 10px;
      }
      .section-head h2 {
        font-size: 26px;
      }
      .guide-card {
        flex-direction: column;
        text-align: center;
        padding: 24px 20px;
        gap: 14px;
      }
      .guide-arrow {
        transform: rotate(90deg);
      }
      .guide-card:hover .guide-arrow {
        transform: rotate(90deg) translateY(4px);
      }
      .pain-grid {
        grid-template-columns: 1fr;
      }
      .pain-card {
        text-align: center;
      }
      .pain-icon {
        margin-left: auto;
        margin-right: auto;
      }
      .steps {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: 1fr;
      }
      .stat-num {
        font-size: 36px;
      }
      .device-media img {
        height: 220px;
      }
      .cta-section {
        padding-top: 64px;
        padding-bottom: 64px;
      }
      .cta-inner h2 {
        font-size: 26px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .modal-card {
        padding: 24px;
      }
      .back-top {
        bottom: 16px;
        right: 16px;
        width: 38px;
        height: 38px;
      }
    }
    @media (max-width: 480px) {
      .brand-text {
        font-size: 14px;
      }
      .brand-icon {
        width: 30px;
        height: 30px;
        font-size: 15px;
      }
      .header-actions .btn-sm {
        padding: 0 12px;
        font-size: 12px;
        height: 34px;
      }
      .section-head p {
        font-size: 14px;
      }
      .guide-info p {
        font-size: 13px;
      }
    }

/* roulang page: article */
:root{
  --green:#00D26A;
  --green-hover:#00B85A;
  --green-light:#EAFBF2;
  --dark:#0E2B1F;
  --orange:#FF6B2C;
  --bg:#F6F8F7;
  --card:#FFFFFF;
  --border:#E8EFEB;
  --text:#3F4A45;
  --text-light:#98A6A0;
  --radius:16px;
  --radius-sm:12px;
  --radius-lg:20px;
  --shadow:0 8px 30px rgba(14,43,31,0.08);
  --shadow-hover:0 14px 40px rgba(0,210,106,0.18);
  --container:1280px;
  --space:96px;
  --space-mobile:56px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--bg);color:var(--text);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;border:none;cursor:pointer;background:none}
input,textarea,select{font-family:inherit}
ul,ol{list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid rgba(0,210,106,0.4);outline-offset:2px}
.container{max-width:1280px;margin:0 auto;padding:0 24px}
.site-header{background:#fff;border-bottom:1px solid var(--border);box-shadow:0 2px 16px rgba(14,43,31,0.05);position:sticky;top:0;z-index:100;height:64px;display:flex;align-items:center}
.header-inner{display:flex;align-items:center;justify-content:space-between;width:100%;height:100%}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;background:var(--green);color:#fff;font-size:22px;font-weight:800;border-radius:50%;box-shadow:0 4px 14px rgba(0,210,106,0.35)}
.brand-text{font-size:19px;font-weight:800;color:var(--dark);white-space:nowrap}
.main-nav{display:flex;gap:8px;align-items:center}
.nav-link{position:relative;padding:8px 14px;font-size:15px;font-weight:600;color:var(--text);border-radius:999px;transition:color .25s}
.nav-link:hover{color:var(--dark)}
.nav-link.active{color:var(--dark);font-weight:700}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;background:var(--green);border-radius:3px;opacity:0;transition:opacity .25s;transform:scaleX(.7)}
.nav-link:hover::after,.nav-link.active::after{opacity:1;transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px}
.search-form{display:flex;align-items:center;background:#F2F5F3;border-radius:999px;height:38px;padding:0 16px;border:2px solid transparent;transition:border-color .25s,box-shadow .25s}
.search-form:focus-within{border-color:var(--green);box-shadow:0 0 0 3px rgba(0,210,106,.12)}
.search-form input{border:none;background:none;outline:none;font-size:14px;width:130px;color:var(--text)}
.search-form button{color:var(--text-light);font-size:14px;padding:4px;line-height:1}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;font-weight:600;transition:all .3s ease;line-height:1}
.btn-primary{background:var(--green);color:#fff;height:46px;padding:0 28px;font-size:15px;box-shadow:0 6px 20px rgba(0,210,106,.3)}
.btn-primary:hover{background:var(--green-hover);transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.btn-primary:active{transform:scale(.98)}
.btn-sm{height:38px;padding:0 20px;font-size:14px}
.btn-outline{background:transparent;border:1.5px solid var(--dark);color:var(--dark);height:46px;padding:0 28px;font-size:15px}
.btn-outline:hover{background:var(--green-light);border-color:var(--green)}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px;z-index:120}
.nav-toggle span{width:22px;height:2px;background:var(--dark);border-radius:2px;transition:all .3s}
.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)}
.curtain-banner{background:linear-gradient(90deg,rgba(14,43,31,.94),rgba(14,43,31,.55)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;padding:54px 0 88px;position:relative}
.curtain-banner::after{content:"";position:absolute;left:0;right:0;bottom:0;height:40px;background:linear-gradient(180deg,transparent,var(--bg))}
.breadcrumb{position:relative;z-index:2;font-size:13px;color:rgba(255,255,255,.72);display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.breadcrumb a{display:inline-flex;align-items:center;gap:6px;transition:color .25s}
.breadcrumb a:hover{color:var(--green)}
.breadcrumb .breadcrumb-sep{opacity:.5;font-size:12px}
.breadcrumb .breadcrumb-current{color:#fff;font-weight:600;max-width:420px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.article-wrapper{margin-top:-48px;position:relative;z-index:3;padding-bottom:var(--space)}
.article-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:48px;max-width:860px;margin:0 auto}
.article-head{margin-bottom:34px;padding-bottom:30px;border-bottom:1px solid var(--border)}
.article-cat{display:inline-flex;align-items:center;gap:6px;background:var(--green-light);color:var(--green);font-size:13px;font-weight:700;padding:5px 14px;border-radius:6px;margin-bottom:16px}
.article-title{font-size:32px;line-height:1.3;font-weight:800;color:var(--dark);margin-bottom:14px}
.article-meta{display:flex;align-items:center;gap:20px;font-size:13px;color:var(--text-light)}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.article-excerpt{margin-top:20px;font-size:15px;line-height:1.8;color:var(--text);padding:16px 22px;background:var(--bg);border-left:3px solid var(--green);border-radius:0 12px 12px 0}
.article-cover{width:100%;height:320px;object-fit:cover;border-radius:var(--radius);margin-top:26px;box-shadow:var(--shadow)}
.article-content{max-width:760px;margin:0 auto;font-size:16px;line-height:1.95;color:#333}
.article-content h2{font-size:26px;line-height:1.35;font-weight:800;color:var(--dark);margin:40px 0 16px;padding-bottom:10px;border-bottom:2px solid var(--green-light)}
.article-content h3{font-size:21px;line-height:1.4;font-weight:700;color:var(--dark);margin:32px 0 12px}
.article-content p{margin:16px 0}
.article-content ul,.article-content ol{margin:16px 0;padding-left:24px}
.article-content ul li{list-style:disc;margin-bottom:8px}
.article-content ol li{list-style:decimal;margin-bottom:8px}
.article-content blockquote{margin:24px 0;padding:16px 24px;background:var(--green-light);border-left:4px solid var(--green);border-radius:0 12px 12px 0;color:var(--dark);font-weight:500}
.article-content img{border-radius:var(--radius-sm);margin:24px 0;box-shadow:var(--shadow)}
.article-content a{color:var(--green);font-weight:600;text-decoration:underline;text-underline-offset:4px}
.article-content table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px}
.article-content table th,.article-content table td{border:1px solid var(--border);padding:10px 14px;text-align:left}
.article-content table th{background:var(--dark);color:#fff;font-weight:600}
.article-content table tr:nth-child(even) td{background:var(--bg)}
.article-pagination{display:flex;gap:16px;margin-top:42px;padding-top:26px;border-top:1px solid var(--border)}
.pagination-link{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px 22px;transition:all .3s;display:block}
.pagination-link:hover{border-color:var(--green);background:var(--green-light);transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.pagination-link.next{text-align:right}
.pagination-label{display:block;font-size:12px;color:var(--text-light);margin-bottom:5px}
.pagination-text{display:block;font-size:15px;font-weight:600;color:var(--dark);line-height:1.5}
.not-found{text-align:center;padding:64px 24px}
.not-found-icon{font-size:52px;color:var(--green);margin-bottom:18px}
.not-found h1{font-size:26px;font-weight:800;color:var(--dark);margin-bottom:12px}
.not-found p{color:var(--text-light);margin-bottom:28px}
.related-section{padding:var(--space) 0;background:var(--bg)}
.section-title{font-size:32px;font-weight:800;color:var(--dark);text-align:center;margin-bottom:10px;line-height:1.3}
.section-subtitle{text-align:center;color:var(--text-light);margin-bottom:48px;font-size:15px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.related-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .35s;display:flex;flex-direction:column}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--green)}
.related-card img{width:100%;height:180px;object-fit:cover}
.related-body{padding:22px;flex:1;display:flex;flex-direction:column}
.related-body h3{font-size:17px;font-weight:700;color:var(--dark);line-height:1.5;margin-bottom:8px}
.related-body p{font-size:14px;color:var(--text-light);line-height:1.7;margin-top:auto}
.faq-section{padding:var(--space) 0;background:var(--card)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden;transition:border-color .3s,box-shadow .3s}
.faq-item.active{border-color:var(--green);box-shadow:0 8px 24px rgba(0,210,106,.1)}
.faq-question{display:flex;align-items:center;justify-content:space-between;width:100%;padding:0 24px;height:56px;font-size:15px;font-weight:600;color:var(--dark);text-align:left;transition:background .3s}
.faq-question:hover{background:var(--green-light)}
.faq-icon{transition:transform .3s;font-size:24px;color:var(--green);font-weight:300;line-height:1}
.faq-item.active .faq-icon{transform:rotate(45deg)}
.faq-answer{display:none;padding:0 24px 22px;font-size:14px;line-height:1.85;color:var(--text)}
.faq-item.active .faq-answer{display:block}
.cta-section{padding:var(--space) 0;background:var(--bg)}
.cta-box{max-width:860px;margin:0 auto;background:var(--dark);border-radius:24px;padding:58px 64px;text-align:center;position:relative;overflow:hidden;box-shadow:0 20px 50px rgba(14,43,31,.25)}
.cta-box::after{content:"";position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0,rgba(255,255,255,.035) 1px,transparent 1px,transparent 42px),repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0,rgba(255,255,255,.035) 1px,transparent 1px,transparent 42px)}
.cta-box h2{color:#fff;font-size:30px;font-weight:800;margin-bottom:14px;position:relative;z-index:2}
.cta-box p{color:rgba(255,255,255,.72);margin-bottom:30px;position:relative;z-index:2;font-size:15px}
.cta-box .btn{position:relative;z-index:2}
.site-footer{background:var(--dark);padding:64px 0 32px;color:rgba(255,255,255,.68)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:48px;margin-bottom:40px}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.logo-icon{width:36px;height:36px;background:var(--green);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:20px;flex-shrink:0}
.logo-text{color:#fff;font-size:18px;font-weight:800}
.site-footer p{font-size:14px;line-height:1.8}
.footer-links h4,.footer-guide h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{transition:color .25s}
.footer-links a:hover{color:var(--green)}
.footer-guide p{margin-bottom:18px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:24px;text-align:center;font-size:13px;color:rgba(255,255,255,.42)}
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(14,43,31,.55);z-index:1000;align-items:center;justify-content:center;padding:20px}
.modal-overlay.active{display:flex}
.modal-card{background:#fff;border-radius:20px;width:460px;max-width:100%;padding:40px;position:relative;box-shadow:0 24px 64px rgba(0,0,0,.22);animation:modalIn .35s ease}
@keyframes modalIn{from{opacity:0;transform:translateY(24px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
.modal-close{position:absolute;top:16px;right:16px;font-size:22px;color:var(--text-light);width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .25s}
.modal-close:hover{background:var(--bg);color:var(--dark)}
.modal-card h3{font-size:22px;font-weight:800;color:var(--dark);margin-bottom:8px}
.modal-sub{font-size:13px;color:var(--text-light);margin-bottom:24px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--dark);margin-bottom:6px}
.form-group input,.form-group select{width:100%;height:46px;border:1px solid var(--border);border-radius:12px;padding:0 16px;font-size:14px;background:var(--bg);outline:none;transition:border-color .25s,box-shadow .25s,background .25s;color:var(--text)}
.form-group input:focus,.form-group select:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(0,210,106,.15);background:#fff}
.modal-submit{width:100%;height:46px}
.form-success{background:var(--green-light);color:var(--green);font-size:13px;font-weight:600;padding:12px 16px;border-radius:8px;text-align:center;margin-top:12px}
.privacy-note{font-size:12px;color:var(--text-light);text-align:center;margin-top:14px;display:flex;align-items:center;justify-content:center;gap:6px}
.back-to-top{position:fixed;right:28px;bottom:28px;width:44px;height:44px;background:var(--green);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;box-shadow:0 8px 24px rgba(0,210,106,.35);opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s;z-index:90}
.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--green-hover);transform:translateY(-3px)}
@media(max-width:1199px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .article-card{padding:40px 32px}
}
@media(max-width:991px){
  .main-nav{display:none}
  .main-nav.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);padding:16px 24px;gap:6px;box-shadow:0 16px 30px rgba(0,0,0,.08)}
  .main-nav.open .nav-link{padding:12px 14px}
  .nav-toggle{display:flex}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .article-title{font-size:28px}
  .article-cover{height:240px}
  .cta-box{padding:44px 32px}
}
@media(max-width:767px){
  .header-actions .search-form{display:none}
  .header-actions .btn-sm{padding:0 16px;font-size:13px}
  .curtain-banner{padding:36px 0 72px}
  .article-wrapper{padding-bottom:var(--space-mobile)}
  .article-card{padding:26px 20px;border-radius:var(--radius)}
  .article-title{font-size:23px;line-height:1.4}
  .article-meta{flex-wrap:wrap;gap:10px 16px}
  .article-excerpt{font-size:14px;padding:14px 16px}
  .article-cover{height:auto;max-height:220px}
  .article-pagination{flex-direction:column}
  .related-section,.faq-section,.cta-section{padding:var(--space-mobile) 0}
  .section-title{font-size:25px}
  .related-grid{grid-template-columns:1fr}
  .related-card{flex-direction:row}
  .related-card img{width:140px;height:120px;flex-shrink:0;object-fit:cover}
  .related-body{padding:16px}
  .related-body h3{font-size:15px}
  .faq-question{height:auto;min-height:56px;padding:12px 18px;font-size:14px}
  .faq-answer{padding:0 18px 18px}
  .cta-box h2{font-size:24px}
  .modal-card{padding:28px 20px}
  .back-to-top{right:16px;bottom:16px;width:40px;height:40px}
}
@media(max-width:520px){
  .brand-text{font-size:16px}
  .brand-icon{width:34px;height:34px;font-size:19px}
  .header-actions .btn-sm{padding:0 12px;font-size:12px}
  .container{padding:0 18px}
  .related-card{flex-direction:column}
  .related-card img{width:100%;height:160px}
  .article-content h2{font-size:22px}
  .article-content table{display:block;overflow-x:auto}
}