/* roulang page: index */
:root {
  --primary: #0E9A66;
  --primary-dark: #128A5B;
  --graphite: #1B1D1B;
  --surface: #F6F5F1;
  --orange: #FF6B00;
  --text-main: #1B1D1B;
  --text-weak: #64748B;
  --border: #E5E7EB;
  --radius: 8px;
  --shadow-card: 0 8px 24px rgba(27, 29, 27, 0.08);
  --shadow-lift: 0 12px 32px rgba(27, 29, 27, 0.14);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--surface);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: all .25s ease;
}
button, input {
  font-family: inherit;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-padding {
  padding: 96px 0;
}
@media (max-width: 768px) {
  .section-padding {
    padding: 56px 0;
  }
}
.section-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--graphite);
  position: relative;
}
.section-lead {
  font-size: 17px;
  color: var(--text-weak);
  margin-top: 10px;
  max-width: 640px;
  line-height: 1.75;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  padding: 14px 30px;
  border-radius: 6px;
  box-shadow: 0 4px 14px rgba(14, 154, 102, 0.28);
  transition: all .3s ease;
  border: none;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.btn-primary:hover {
  background: #0B6B47;
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(14, 154, 102, 0.36);
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(14, 154, 102, 0.4);
  outline-offset: 2px;
}
.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--orange);
  color: #1B1D1B;
  font-weight: 700;
  font-size: 16px;
  padding: 16px 42px;
  border-radius: 6px;
  box-shadow: 0 6px 20px rgba(255, 107, 0, 0.32);
  transition: all .3s ease;
  border: none;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.btn-accent:hover {
  background: #F05A00;
  transform: translateY(-2px) scale(1.01);
  box-shadow: 0 8px 28px rgba(255, 107, 0, 0.42);
}
.btn-accent:focus-visible {
  outline: 3px solid rgba(255, 107, 0, 0.4);
  outline-offset: 2px;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--graphite);
  font-weight: 600;
  font-size: 15px;
  padding: 13px 28px;
  border-radius: 6px;
  border: 1.5px solid rgba(27, 29, 27, 0.18);
  transition: all .3s ease;
  cursor: pointer;
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(14, 154, 102, 0.04);
  transform: translateY(-2px);
}
.nav-link {
  position: relative;
  font-weight: 500;
  font-size: 15px;
  color: #3D443D;
  padding: 6px 2px;
  transition: color .2s;
}
.nav-link:after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform .3s ease;
}
.nav-link:hover:after,
.nav-link.active:after {
  transform: scaleX(1);
  transform-origin: left center;
}
.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}
.tag-span {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 500;
  color: #3D443D;
  background: rgba(27, 29, 27, 0.05);
  border: 1px solid rgba(27, 29, 27, 0.06);
  transition: all .25s;
}
.tag-span:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.stat-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 20px 18px;
  text-align: center;
  backdrop-filter: blur(4px);
  transition: background .3s;
}
.stat-card:hover {
  background: rgba(255, 255, 255, 0.1);
}
.stat-num {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  display: block;
}
.stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 4px;
  display: block;
}
.card-white {
  background: #fff;
  border-radius: 10px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
}
.card-white:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}
.step-card {
  background: #fff;
  border-radius: 12px;
  padding: 32px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform .3s, box-shadow .3s;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}
.step-num {
  font-size: 52px;
  font-weight: 800;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px var(--primary);
  letter-spacing: -0.03em;
  display: block;
}
.faq-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 22px 8px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  color: var(--graphite);
  text-align: left;
  transition: color .2s;
}
.faq-btn:hover {
  color: var(--primary);
}
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(14, 154, 102, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 300;
  color: var(--primary);
  transition: transform .35s ease, background .3s;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq-answer-inner {
  padding: 0 20px 22px 8px;
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
  border-bottom: 1px solid var(--border);
}
.img-hover {
  overflow: hidden;
}
.img-hover img {
  transition: transform .5s ease;
}
.img-hover:hover img {
  transform: scale(1.05);
}
.slider-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding-bottom: 16px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.slider-track::-webkit-scrollbar {
  height: 4px;
}
.slider-track::-webkit-scrollbar-thumb {
  background: rgba(14, 154, 102, 0.3);
  border-radius: 4px;
}
.slider-item {
  flex: 0 0 460px;
  scroll-snap-align: start;
}
@media (max-width: 640px) {
  .slider-item {
    flex-basis: 86%;
  }
}
.info-card {
  display: flex;
  gap: 20px;
  background: #fff;
  border-radius: 10px;
  box-shadow: var(--shadow-card);
  padding: 18px;
  transition: transform .3s, box-shadow .3s;
}
.info-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}
.info-card img {
  width: 110px;
  height: 110px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}
.news-link {
  color: var(--primary);
  font-weight: 500;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .3s;
}
.news-link:hover {
  gap: 8px;
}
.navbar {
  background: rgba(246, 245, 241, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(27, 29, 27, 0.06);
}
.trend-bar {
  background: rgba(27, 29, 27, 0.02);
  border-top: 1px solid rgba(27, 29, 27, 0.05);
  overflow-x: auto;
  white-space: nowrap;
}
.hero-bg {
  background-image: linear-gradient(100deg, rgba(20, 24, 20, 0.92) 0%, rgba(14, 154, 102, 0.65) 65%, rgba(14, 154, 102, 0.4) 100%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center 30%;
}
@media (max-width: 768px) {
  .hero-bg {
    background-image: linear-gradient(90deg, rgba(20, 24, 20, 0.92) 0%, rgba(14, 154, 102, 0.7) 100%), url('/assets/images/backpic/back-1.webp');
  }
}
.hero-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.cta-section-bg {
  background-color: var(--graphite);
  background-image: radial-gradient(ellipse at 20% 50%, rgba(14, 154, 102, 0.4) 0%, transparent 60%), radial-gradient(ellipse at 80% 20%, rgba(14, 154, 102, 0.15) 0%, transparent 40%);
}
.footer-bg {
  background-color: #0B4F3A;
  background-image: linear-gradient(160deg, #0B5A42 0%, #0B4F3A 55%, #083E2D 100%);
}
.mobile-menu-panel {
  display: none;
  background: var(--surface);
  border-top: 1px solid rgba(27, 29, 27, 0.06);
}
.mobile-menu-open .mobile-menu-panel {
  display: block;
}
@media (min-width: 768px) {
  .mobile-menu-panel {
    display: none !important;
  }
}
.search-wrap {
  position: relative;
}
.search-input {
  width: 0;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 6px;
  opacity: 0;
  transition: all .35s ease;
  font-size: 14px;
  height: 38px;
  outline: none;
  background: #fff;
}
.search-wrap.expanded .search-input {
  width: 220px;
  padding: 8px 14px;
  border-color: var(--primary);
  opacity: 1;
}
.search-wrap.expanded .search-btn {
  color: var(--primary);
}
.search-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  cursor: pointer;
  color: #4B5563;
  border-radius: 6px;
  transition: all .25s;
}
.search-btn:hover {
  color: var(--primary);
  background: rgba(14, 154, 102, 0.06);
}
@media (max-width: 768px) {
  .search-input {
    position: absolute;
    right: 44px;
    top: 0;
  }
  .search-wrap.expanded .search-input {
    width: 160px;
  }
}

/* roulang page: category1 */
:root {
            --brand: #0E9A66;
            --brand-dark: #0B4F3A;
            --brand-deep: #092E23;
            --brand-light: #E8F5EF;
            --ink: #1B1D1B;
            --bg: #F6F5F1;
            --card: #FFFFFF;
            --muted: #6B7280;
            --border: #E5E7EB;
            --accent: #FF6B00;
            --radius: 14px;
            --radius-sm: 9px;
            --shadow: 0 8px 24px rgba(27, 29, 27, 0.08);
            --shadow-hover: 0 14px 34px rgba(27, 29, 27, 0.12);
        }
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        button, input, textarea {
            font: inherit;
        }
        .container {
            max-width: 1220px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(246, 245, 241, 0.92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }
        .logo-text {
            font-weight: 900;
            font-size: 19px;
            letter-spacing: -0.3px;
            color: var(--ink);
            white-space: nowrap;
        }
        .logo-text .brand-word {
            color: var(--brand);
        }
        .nav-link {
            font-size: 14px;
            font-weight: 600;
            color: #4B5563;
            padding: 6px 2px;
            border-bottom: 2px solid transparent;
            transition: color .2s, border-color .2s;
        }
        .nav-link:hover {
            color: var(--brand);
        }
        .nav-link.active {
            color: var(--brand);
            border-bottom-color: var(--brand);
        }
        .header-search {
            position: relative;
            display: flex;
            align-items: center;
        }
        .header-search input {
            width: 0;
            padding: 0;
            border: 1px solid transparent;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: all .3s ease;
            font-size: 13px;
            outline: none;
        }
        .header-search input.expanded {
            width: 180px;
            padding: 7px 34px 7px 12px;
            border-color: var(--border);
            background: #fff;
        }
        .header-search input.expanded:focus {
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(14, 154, 102, 0.12);
        }
        .search-toggle {
            cursor: pointer;
            background: none;
            border: none;
            padding: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #4B5563;
            transition: color .2s;
        }
        .search-toggle:hover {
            color: var(--brand);
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            border-radius: var(--radius-sm);
            padding: 9px 18px;
            transition: all .25s;
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .btn-accent:hover {
            filter: brightness(0.92);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(255, 107, 0, 0.25);
        }
        .menu-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            color: var(--ink);
        }
        .mobile-menu {
            display: none;
            padding: 12px 24px 20px;
            border-top: 1px solid var(--border);
            background: var(--bg);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu a {
            display: block;
            padding: 10px 0;
            font-size: 15px;
            font-weight: 600;
            color: #4B5563;
            border-bottom: 1px solid #eee;
        }
        .mobile-menu a.active {
            color: var(--brand);
        }
        /* Hero */
        .hero {
            position: relative;
            padding: 76px 0 84px;
            background-color: var(--bg);
            background-image: linear-gradient(100deg, rgba(246, 245, 241, 0.95) 55%, rgba(27, 29, 27, 0.88)), url('/assets/images/backpic/back-1.webp');
            background-size: cover, cover;
            background-position: center, center;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            right: -80px;
            bottom: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(14, 154, 102, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.3fr 0.7fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(14, 154, 102, 0.1);
            color: var(--brand-dark);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 22px;
            border: 1px solid rgba(14, 154, 102, 0.2);
        }
        .hero h1 {
            font-size: clamp(34px, 5vw, 52px);
            line-height: 1.15;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--ink);
            margin-bottom: 18px;
        }
        .hero h1 .text-brand {
            color: var(--brand);
        }
        .hero-desc {
            font-size: 16px;
            line-height: 1.8;
            color: #4B5563;
            max-width: 520px;
            margin-bottom: 30px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-orange {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            border-radius: var(--radius-sm);
            padding: 14px 30px;
            transition: all .25s;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(255, 107, 0, 0.2);
        }
        .btn-orange:hover {
            filter: brightness(0.92);
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(255, 107, 0, 0.3);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--ink);
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            padding: 13px 26px;
            border: 1.5px solid #D1D5DB;
            transition: all .25s;
        }
        .btn-ghost:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: rgba(14, 154, 102, 0.04);
        }
        .hero-stats {
            display: grid;
            gap: 14px;
        }
        .stat-card {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(8px);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 255, 255, 0.6);
            transition: transform .25s, box-shadow .25s;
        }
        .stat-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .stat-num {
            font-size: 32px;
            font-weight: 900;
            color: var(--brand);
            line-height: 1.1;
        }
        .stat-num span {
            font-size: 16px;
            font-weight: 700;
            margin-left: 2px;
        }
        .stat-label {
            font-size: 13px;
            color: var(--muted);
            margin-top: 4px;
        }
        /* Section */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-head {
            margin-bottom: 42px;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--brand);
            background: var(--brand-light);
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 900;
            line-height: 1.25;
            color: var(--ink);
            margin-bottom: 10px;
        }
        .section-head p {
            color: var(--muted);
            font-size: 15px;
            max-width: 640px;
            line-height: 1.7;
        }
        /* Feature cards */
        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 34px 30px;
            box-shadow: var(--shadow);
            border: 1px solid #f0f0f0;
            transition: transform .25s, box-shadow .25s;
        }
        .section-alt .feature-card {
            background: var(--bg);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-light);
            color: var(--brand);
            margin-bottom: 18px;
            font-size: 22px;
            font-weight: 900;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--ink);
        }
        .feature-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--muted);
        }
        /* Scenario */
        .scenario-row {
            display: grid;
            grid-template-columns: 100px 1fr;
            gap: 22px;
            align-items: start;
            padding: 26px 0;
            border-bottom: 1px solid var(--border);
        }
        .scenario-row:last-child {
            border-bottom: none;
        }
        .scenario-num {
            font-size: 42px;
            font-weight: 900;
            line-height: 1;
            color: transparent;
            -webkit-text-stroke: 1.5px var(--brand);
            opacity: 0.5;
        }
        .scenario-row h3 {
            font-size: 18px;
            font-weight: 800;
            color: var(--ink);
            margin-bottom: 6px;
        }
        .scenario-row p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--muted);
        }
        /* Process */
        .process-wrap {
            position: relative;
            padding: 20px 0;
        }
        .process-wrap::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 40px;
            bottom: 40px;
            width: 3px;
            background: linear-gradient(180deg, var(--brand), rgba(14, 154, 102, 0.1));
            transform: translateX(-50%);
        }
        .step-item {
            position: relative;
            max-width: 480px;
            padding: 26px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border-left: 4px solid var(--brand);
            margin-bottom: 36px;
        }
        .step-item.step-left {
            margin-left: 0;
            margin-right: auto;
        }
        .step-item.step-right {
            margin-left: auto;
            margin-right: 0;
        }
        .step-num {
            font-size: 28px;
            font-weight: 900;
            color: var(--brand);
            margin-bottom: 8px;
        }
        .step-item h3 {
            font-size: 17px;
            font-weight: 800;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }
        /* Case */
        .case-scroll {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            padding-bottom: 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .case-card {
            flex: 0 0 86%;
            max-width: 520px;
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            scroll-snap-align: start;
            transition: transform .25s, box-shadow .25s;
        }
        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .case-card img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .case-body {
            padding: 22px 24px 24px;
        }
        .case-body h3 {
            font-size: 17px;
            font-weight: 800;
            margin-bottom: 6px;
        }
        .case-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .case-metrics {
            display: flex;
            gap: 20px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        .case-metric {
            flex: 1;
        }
        .case-metric .val {
            font-size: 20px;
            font-weight: 900;
            color: var(--brand);
        }
        .case-metric .label {
            font-size: 12px;
            color: var(--muted);
        }
        /* FAQ */
        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow .25s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-item summary {
            list-style: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 700;
            color: var(--ink);
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-icon {
            position: relative;
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--brand-light);
            transition: background .3s, transform .3s;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: var(--brand);
            border-radius: 2px;
            transition: all .3s;
        }
        .faq-icon::before {
            width: 10px;
            height: 2px;
        }
        .faq-icon::after {
            width: 2px;
            height: 10px;
        }
        .faq-item[open] .faq-icon {
            background: var(--brand);
        }
        .faq-item[open] .faq-icon::before,
        .faq-item[open] .faq-icon::after {
            background: #fff;
        }
        .faq-item[open] .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
            opacity: 0;
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--muted);
        }
        /* CTA */
        .cta-section {
            background: linear-gradient(120deg, #0B4F3A 0%, #0A3D2F 60%, #092E23 100%);
            padding: 76px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: repeating-linear-gradient(45deg, transparent 0, transparent 12px, rgba(255, 255, 255, 0.02) 12px, rgba(255, 255, 255, 0.02) 14px);
            pointer-events: none;
        }
        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 900;
            color: #fff;
            margin-bottom: 8px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
        }
        .btn-xxl {
            font-size: 17px;
            padding: 18px 38px;
            border-radius: 12px;
        }
        /* Footer */
        .footer-bg {
            background: var(--brand-deep);
        }
        .tag-span {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            border: 1px solid var(--border);
            color: var(--muted);
            background: #fff;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .hide-lg-search {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .hero {
                padding: 52px 0 56px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
            }
            .stat-card {
                padding: 14px;
                text-align: center;
            }
            .stat-num {
                font-size: 24px;
            }
            .nav-desktop {
                display: none;
            }
            .menu-btn {
                display: flex;
            }
            .process-wrap::before {
                left: 14px;
            }
            .step-item.step-left,
            .step-item.step-right {
                margin-left: 32px;
                margin-right: 0;
            }
            .section {
                padding: 52px 0;
            }
            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
            }
            .stat-card {
                padding: 10px 6px;
            }
            .stat-num {
                font-size: 20px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .btn-orange,
            .btn-ghost {
                width: 100%;
                text-align: center;
            }
            .header-search {
                display: none;
            }
            .case-card {
                flex-basis: 100%;
                max-width: 100%;
            }
        }

/* roulang page: article */
:root {
    --brand: #0E9A66;
    --brand-deep: #128A5B;
    --ink: #1B1D1B;
    --paper: #F6F5F1;
    --orange: #FF6B00;
    --border: rgba(27, 29, 27, 0.08);
    --shadow: 0 8px 24px rgba(27, 29, 27, 0.08);
    --radius: 12px;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--paper);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  .container { max-width: 1280px; margin: 0 auto; padding-left: 1.5rem; padding-right: 1.5rem; }
  a { text-decoration: none; color: inherit; }
  img { display: block; max-width: 100%; }
  .container-fluid { width: 100%; }

  /* 导航 */
  .nav-link {
    position: relative;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(27, 29, 27, 0.65);
    transition: color 0.2s ease;
    padding: 0.4rem 0.1rem;
    white-space: nowrap;
  }
  .nav-link:hover { color: var(--brand); }
  .nav-link.active { color: var(--brand); font-weight: 600; }
  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--brand);
    border-radius: 2px;
  }

  /* 标签 */
  .tag-span {
    display: inline-flex;
    align-items: center;
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 12px;
    color: rgba(27, 29, 27, 0.6);
    border: 1px solid rgba(27, 29, 27, 0.12);
    background: transparent;
    transition: all 0.2s ease;
    cursor: pointer;
    white-space: nowrap;
  }
  .tag-span:hover {
    border-color: var(--brand);
    color: var(--brand);
    background: rgba(14, 154, 102, 0.04);
  }

  /* 按钮 */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    background: var(--brand);
    color: #fff;
    font-weight: 700;
    font-size: 14px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    line-height: 1.4;
  }
  .btn-primary:hover {
    background: var(--brand-deep);
    transform: translateY(-1px);
    box-shadow: 0 8px 16px rgba(14, 154, 102, 0.2);
  }
  .btn-primary:focus-visible { outline: 3px solid rgba(14, 154, 102, 0.4); outline-offset: 2px; }

  .btn-orange {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    background: var(--orange);
    color: #fff;
    font-weight: 700;
    font-size: 14px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    line-height: 1.4;
  }
  .btn-orange:hover {
    background: #E55E00;
    transform: translateY(-1px);
    box-shadow: 0 8px 16px rgba(255, 107, 0, 0.2);
  }
  .btn-orange:focus-visible { outline: 3px solid rgba(255, 107, 0, 0.4); outline-offset: 2px; }

  /* 面包屑 */
  .breadcrumb a { color: rgba(27, 29, 27, 0.5); transition: color 0.2s; }
  .breadcrumb a:hover { color: var(--brand); }
  .breadcrumb .sep { color: rgba(27, 29, 27, 0.25); margin: 0 0.5rem; font-size: 12px; }

  /* 文章内容 */
  .article-content { max-width: 700px; }
  .article-content p {
    margin-bottom: 1.5rem;
    line-height: 1.9;
    color: rgba(27, 29, 27, 0.78);
    font-size: 16px;
    letter-spacing: 0.01em;
  }
  .article-content h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-top: 2.25rem;
    margin-bottom: 1rem;
    color: var(--ink);
    line-height: 1.4;
  }
  .article-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    color: var(--ink);
  }
  .article-content ul {
    list-style: disc;
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: rgba(27, 29, 27, 0.78);
    line-height: 1.9;
  }
  .article-content ol {
    list-style: decimal;
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: rgba(27, 29, 27, 0.78);
    line-height: 1.9;
  }
  .article-content li { margin-bottom: 0.5rem; }
  .article-content img {
    border-radius: var(--radius);
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    margin: 0 0 1.75rem 0;
  }
  .article-content blockquote {
    border-left: 3px solid var(--brand);
    background: rgba(14, 154, 102, 0.05);
    padding: 1rem 1.5rem;
    border-radius: 0 8px 8px 0;
    margin: 1.75rem 0;
    color: rgba(27, 29, 27, 0.7);
    font-style: italic;
  }
  .article-content a {
    color: var(--brand-deep);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color 0.2s;
  }
  .article-content a:hover { color: var(--brand); }
  .article-content code {
    background: rgba(27, 29, 27, 0.05);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.9em;
    font-family: 'SFMono-Regular', Consolas, monospace;
  }

  /* 页脚 */
  .footer-bg { background: #0B4F3A; }

  /* 卡片 */
  .card-white {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
  }
  .card-white:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(27, 29, 27, 0.12);
  }

  /* 通用工具 */
  .line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .line-clamp-1 {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* 响应式 */
  @media (max-width: 768px) {
    .container { padding-left: 1rem; padding-right: 1rem; }
    .article-content p { font-size: 15px; }
    .nav-scroll-x {
      display: flex;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      gap: 1.25rem;
      scrollbar-width: none;
    }
    .nav-scroll-x::-webkit-scrollbar { display: none; }
  }