/* roulang page: index */
:root {
            --primary: #173F35;
            --primary-dark: #102E27;
            --accent: #A5663F;
            --background: #F6F7F5;
            --surface: #FFFFFF;
            --text: #202622;
            --muted: #66716B;
            --border: #D9DEDA;
            --success: #2F725C;
            --danger: #A33A3A;
            --radius: 8px;
            --shadow: 0 6px 20px rgba(23, 63, 53, .08);
            --transition: 180ms ease;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 88px;
        }

        body {
            margin: 0;
            overflow-x: hidden;
            color: var(--text);
            background: var(--background);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0;
            -webkit-font-smoothing: antialiased;
        }

        body.menu-open {
            overflow: hidden;
        }

        h1, h2, h3, p {
            margin-top: 0;
        }

        h1, .brand-serif {
            font-family: "Songti SC", "SimSun", serif;
        }

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

        button, input, select, textarea {
            font: inherit;
            letter-spacing: 0;
        }

        button, a, input, select, textarea {
            -webkit-tap-highlight-color: transparent;
        }

        button {
            cursor: pointer;
        }

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

        .site-container {
            width: min(100% - 64px, 1240px);
            margin-inline: auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            height: 72px;
            border-bottom: 1px solid var(--border);
            background: rgba(255, 255, 255, .98);
            box-shadow: 0 2px 12px rgba(23, 63, 53, .03);
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            min-height: 44px;
            align-items: center;
            padding: 0 12px;
            color: var(--muted);
            font-weight: 600;
            transition: color var(--transition), background var(--transition);
        }

        .nav-link::after {
            position: absolute;
            right: 12px;
            bottom: -14px;
            left: 12px;
            height: 2px;
            background: var(--primary);
            content: "";
            opacity: 0;
            transform: scaleX(.4);
            transition: opacity var(--transition), transform var(--transition);
        }

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

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

        .logo-mark {
            display: grid;
            width: 38px;
            height: 38px;
            flex: 0 0 auto;
            place-items: center;
            border-radius: 6px;
            color: #fff;
            background: var(--primary);
        }

        .search-shell {
            position: relative;
            width: 220px;
        }

        .search-input {
            width: 100%;
            height: 42px;
            padding: 0 42px 0 14px;
            border: 1px solid var(--border);
            border-radius: 6px;
            outline: none;
            background: #fff;
            transition: border var(--transition), box-shadow var(--transition);
        }

        .search-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(23, 63, 53, .12);
        }

        .search-submit {
            position: absolute;
            top: 3px;
            right: 3px;
            display: grid;
            width: 36px;
            height: 36px;
            place-items: center;
            border: 0;
            border-radius: 5px;
            color: var(--primary);
            background: transparent;
        }

        .search-submit:hover {
            background: #edf2ef;
        }

        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            min-height: 46px;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 18px;
            border: 1px solid var(--primary);
            border-radius: 6px;
            font-weight: 700;
            line-height: 1.4;
            transition: color var(--transition), background var(--transition), box-shadow var(--transition), transform var(--transition);
        }

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

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

        .btn-secondary {
            color: var(--primary);
            background: #fff;
        }

        .btn-secondary:hover {
            background: #edf2ef;
            transform: translateY(-1px);
        }

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

        :focus-visible {
            outline: 3px solid rgba(165, 102, 63, .45);
            outline-offset: 3px;
        }

        .section-space {
            padding-block: 88px;
        }

        .section-heading {
            margin-bottom: 32px;
        }

        .section-heading h2 {
            margin-bottom: 10px;
            color: var(--primary);
            font-family: "Songti SC", "SimSun", serif;
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
        }

        .section-heading p {
            max-width: 760px;
            margin-bottom: 0;
            color: var(--muted);
            font-size: 17px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 700;
        }

        .eyebrow::before {
            width: 24px;
            height: 2px;
            background: var(--accent);
            content: "";
        }

        .hero-section {
            min-height: 640px;
            border-bottom: 1px solid var(--border);
            background: #eef2ef;
        }

        .metric-block {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: #fff;
            box-shadow: 0 2px 10px rgba(23, 63, 53, .04);
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        .metric-block:hover {
            border-color: #b8c5be;
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .metric-number {
            color: var(--primary);
            font-family: Georgia, "Times New Roman", serif;
            font-size: 46px;
            font-weight: 700;
            line-height: 1;
        }

        .micro-bars span {
            display: block;
            height: 5px;
            border-radius: 2px;
            background: #dfe7e2;
            overflow: hidden;
        }

        .micro-bars span::after {
            display: block;
            width: var(--bar-width, 60%);
            height: 100%;
            background: var(--accent);
            content: "";
        }

        .channel-index button {
            width: 100%;
            border-left: 3px solid transparent;
            color: var(--muted);
            background: transparent;
            transition: color var(--transition), border-color var(--transition), background var(--transition);
        }

        .channel-index button:hover,
        .channel-index button.active {
            border-left-color: var(--accent);
            color: var(--primary);
            background: #edf2ef;
        }

        .content-row {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: #fff;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .content-row:hover {
            border-color: #aabbb2;
            box-shadow: var(--shadow);
        }

        .content-row:hover h3 {
            color: var(--primary);
        }

        .tag {
            display: inline-flex;
            min-height: 28px;
            align-items: center;
            padding: 3px 9px;
            border: 1px solid #cfdbd4;
            border-radius: 5px;
            color: var(--primary);
            background: #f2f6f3;
            font-size: 13px;
            font-weight: 600;
        }

        .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            margin-right: 7px;
            border-radius: 50%;
            background: var(--success);
        }

        .news-link {
            display: grid;
            grid-template-columns: 112px minmax(0, 1fr) auto;
            gap: 18px;
            align-items: center;
            min-height: 72px;
            border-bottom: 1px solid var(--border);
            transition: color var(--transition), background var(--transition);
        }

        .news-link:hover {
            color: var(--primary);
            background: #fafcfb;
        }

        .rank-number {
            color: var(--accent);
            font-family: Georgia, serif;
            font-size: 24px;
            font-weight: 700;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
        }

        .comparison-table th,
        .comparison-table td {
            padding: 20px 22px;
            border: 1px solid var(--border);
            text-align: left;
            vertical-align: top;
        }

        .comparison-table th {
            color: var(--primary);
            background: #edf2ef;
        }

        .comparison-mobile {
            display: none;
        }

        .step-number {
            display: grid;
            width: 42px;
            height: 42px;
            flex: 0 0 auto;
            place-items: center;
            border: 1px solid var(--accent);
            border-radius: 6px;
            color: var(--accent);
            background: #fff;
            font-family: Georgia, serif;
            font-weight: 700;
        }

        .progress-track {
            height: 10px;
            overflow: hidden;
            border-radius: 3px;
            background: #dfe5e1;
        }

        .progress-fill {
            width: 62%;
            height: 100%;
            background: var(--accent);
        }

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

        .faq-button {
            display: flex;
            width: 100%;
            min-height: 72px;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 18px 0;
            border: 0;
            color: var(--text);
            background: transparent;
            text-align: left;
            font-size: 18px;
            font-weight: 700;
        }

        .faq-button:hover {
            color: var(--primary);
        }

        .faq-icon {
            display: grid;
            width: 32px;
            height: 32px;
            flex: 0 0 auto;
            place-items: center;
            border: 1px solid var(--border);
            border-radius: 5px;
            color: var(--primary);
            transition: transform var(--transition), background var(--transition);
        }

        .faq-button[aria-expanded="true"] .faq-icon {
            color: #fff;
            background: var(--primary);
            transform: rotate(45deg);
        }

        .faq-panel {
            overflow: hidden;
            max-height: 0;
            color: var(--muted);
            transition: max-height 220ms ease, padding 220ms ease;
        }

        .faq-panel.open {
            max-height: 320px;
            padding-bottom: 22px;
        }

        .form-control {
            width: 100%;
            min-height: 46px;
            padding: 10px 12px;
            border: 1px solid #bdc8c1;
            border-radius: 6px;
            color: var(--text);
            outline: none;
            background: #fff;
            transition: border var(--transition), box-shadow var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(23, 63, 53, .12);
        }

        .form-control.invalid {
            border-color: var(--danger);
            box-shadow: 0 0 0 3px rgba(163, 58, 58, .1);
        }

        textarea.form-control {
            min-height: 112px;
            resize: vertical;
        }

        .field-error {
            min-height: 22px;
            margin-top: 3px;
            color: var(--danger);
            font-size: 13px;
        }

        .mobile-menu {
            position: fixed;
            inset: 0;
            z-index: 60;
            visibility: hidden;
            opacity: 0;
            transition: visibility var(--transition), opacity var(--transition);
        }

        .mobile-menu.open {
            visibility: visible;
            opacity: 1;
        }

        .mobile-menu-panel {
            position: absolute;
            top: 0;
            right: 0;
            width: min(88vw, 360px);
            height: 100%;
            padding: 20px;
            background: #fff;
            box-shadow: -10px 0 30px rgba(23, 63, 53, .14);
            transform: translateX(100%);
            transition: transform 220ms ease;
        }

        .mobile-menu.open .mobile-menu-panel {
            transform: translateX(0);
        }

        .menu-overlay {
            position: absolute;
            inset: 0;
            border: 0;
            background: rgba(20, 31, 26, .45);
        }

        .site-footer {
            color: rgba(255,255,255,.82);
            background: var(--primary);
        }

        .footer-link {
            display: inline-flex;
            min-height: 44px;
            align-items: center;
            color: rgba(255,255,255,.82);
            transition: color var(--transition);
        }

        .footer-link:hover {
            color: #fff;
        }

        .back-top {
            position: fixed;
            right: 22px;
            bottom: 22px;
            z-index: 35;
            display: grid;
            width: 44px;
            height: 44px;
            visibility: hidden;
            place-items: center;
            border: 1px solid rgba(255,255,255,.3);
            border-radius: 6px;
            color: #fff;
            opacity: 0;
            background: var(--primary);
            box-shadow: var(--shadow);
            transform: translateY(8px);
            transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
        }

        .back-top.show {
            visibility: visible;
            opacity: 1;
            transform: translateY(0);
        }

        @media (max-width: 1024px) {
            .site-container {
                width: min(100% - 48px, 1240px);
            }

            .desktop-nav,
            .desktop-search {
                display: none !important;
            }

            .hero-section {
                min-height: auto;
            }

            .section-space {
                padding-block: 72px;
            }
        }

        @media (max-width: 767px) {
            html {
                scroll-padding-top: 72px;
            }

            body {
                font-size: 15px;
            }

            .site-container {
                width: calc(100% - 32px);
            }

            .site-header {
                height: 60px;
            }

            .logo-mark {
                width: 34px;
                height: 34px;
            }

            .section-space {
                padding-block: 56px;
            }

            .section-heading {
                margin-bottom: 24px;
            }

            .section-heading h2 {
                font-size: 27px;
            }

            .section-heading p {
                font-size: 16px;
            }

            .metric-number {
                font-size: 38px;
            }

            .channel-index {
                display: flex;
                margin-bottom: 20px;
                overflow-x: auto;
                border-bottom: 1px solid var(--border);
                scrollbar-width: thin;
            }

            .channel-index button {
                width: auto;
                min-width: max-content;
                border-bottom: 3px solid transparent;
                border-left: 0;
            }

            .channel-index button:hover,
            .channel-index button.active {
                border-bottom-color: var(--accent);
                border-left-color: transparent;
            }

            .news-link {
                grid-template-columns: 88px minmax(0, 1fr);
                gap: 12px;
                padding-block: 14px;
            }

            .news-link .news-action {
                display: none;
            }

            .comparison-desktop {
                display: none;
            }

            .comparison-mobile {
                display: grid;
            }

            .faq-button {
                min-height: 66px;
                font-size: 16px;
            }

            .back-top {
                right: 14px;
                bottom: 14px;
            }
        }

        @media (max-width: 520px) {
            .site-container {
                width: calc(100% - 28px);
            }

            .brand-name {
                max-width: 205px;
                overflow: hidden;
                font-size: 13px;
                line-height: 1.35;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }

            *, *::before, *::after {
                transition-duration: .01ms !important;
                animation-duration: .01ms !important;
                animation-iteration-count: 1 !important;
            }
        }

/* roulang page: category1 */
:root {
  --primary: #173F35;
  --primary-dark: #102E27;
  --accent: #A5663F;
  --background: #F6F7F5;
  --surface: #FFFFFF;
  --text: #202622;
  --muted: #66716B;
  --border: #D9DEDA;
  --success: #2F725C;
  --danger: #A33A3A;
  --radius: 8px;
  --shadow: 0 6px 20px rgba(23, 63, 53, .08);
  --transition: 180ms ease;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--background);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}
body.menu-open {
  overflow: hidden;
}
h1,
h2,
h3,
p,
ul,
ol,
dl,
dd {
  margin-top: 0;
}
h1,
.brand-serif {
  font-family: "Songti SC", "SimSun", serif;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
select,
textarea {
  font: inherit;
  letter-spacing: 0;
}
button,
a,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
img {
  display: block;
  max-width: 100%;
}
[hidden] {
  display: none !important;
}
::selection {
  color: #fff;
  background: var(--primary);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.site-container {
  width: min(100% - 64px, 1240px);
  margin-inline: auto;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 72px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, .98);
  box-shadow: 0 2px 12px rgba(23, 63, 53, .03);
}
.nav-link {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0 12px;
  color: var(--muted);
  font-weight: 600;
  transition: color var(--transition), background var(--transition);
}
.nav-link::after {
  position: absolute;
  right: 12px;
  bottom: -14px;
  left: 12px;
  height: 2px;
  background: var(--primary);
  content: "";
  opacity: 0;
  transform: scaleX(.4);
  transition: opacity var(--transition), transform var(--transition);
}
.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}
.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}
.logo-mark {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 6px;
  color: #fff;
  background: var(--primary);
}
.search-shell {
  position: relative;
  width: 220px;
}
.search-input {
  width: 100%;
  height: 42px;
  padding: 0 42px 0 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  outline: none;
  color: var(--text);
  background: #fff;
  transition: border var(--transition), box-shadow var(--transition);
}
.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(23, 63, 53, .12);
}
.search-submit {
  position: absolute;
  top: 3px;
  right: 3px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 0;
  border-radius: 5px;
  color: var(--primary);
  background: transparent;
  transition: background var(--transition);
}
.search-submit:hover {
  background: #edf2ef;
}
.btn-primary,
.btn-secondary {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--primary);
  border-radius: 6px;
  font-weight: 700;
  line-height: 1.4;
  transition: color var(--transition), background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.btn-primary {
  color: #fff;
  background: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.btn-secondary {
  color: var(--primary);
  background: #fff;
}
.btn-secondary:hover {
  background: #edf2ef;
  transform: translateY(-1px);
}
.btn-primary:active,
.btn-secondary:active {
  transform: translateY(0);
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(165, 102, 63, .38);
  outline-offset: 2px;
}
.page-intro {
  border-bottom: 1px solid var(--border);
  background: #eef2ef;
}
.breadcrumb a {
  color: var(--muted);
  transition: color var(--transition);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.meta-badge,
.content-tag,
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 3px 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: #fff;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}
.meta-badge::before,
.status-badge::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  content: "";
}
.section-space {
  padding-block: 88px;
}
.section-heading {
  margin-bottom: 32px;
}
.section-heading h2 {
  margin-bottom: 10px;
  color: var(--primary);
  font-family: "Songti SC", "SimSun", serif;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
}
.section-heading p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}
.eyebrow::before {
  width: 24px;
  height: 2px;
  background: var(--accent);
  content: "";
}
.coupon-board {
  position: relative;
  overflow: hidden;
  min-height: 216px;
  border: 1px solid #bfc9c3;
  border-left: 5px solid var(--accent);
  border-radius: var(--radius);
  color: #fff;
  background: var(--primary);
  box-shadow: var(--shadow);
}
.coupon-board::after {
  position: absolute;
  top: 22px;
  right: 156px;
  bottom: 22px;
  border-left: 1px dashed rgba(255,255,255,.35);
  content: "";
}
.coupon-cut {
  position: absolute;
  right: 145px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #eef2ef;
}
.coupon-cut.top {
  top: -11px;
}
.coupon-cut.bottom {
  bottom: -11px;
}
.coupon-side {
  width: 145px;
  flex: 0 0 145px;
}
.filter-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}
.filter-button {
  display: flex;
  width: 100%;
  min-height: 46px;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border: 0;
  border-left: 3px solid transparent;
  color: var(--muted);
  background: transparent;
  text-align: left;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.filter-button:hover,
.filter-button.active {
  border-left-color: var(--accent);
  color: var(--primary);
  background: #edf2ef;
}
.filter-count {
  color: var(--muted);
  font-size: 13px;
}
.form-control {
  width: 100%;
  min-height: 46px;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  outline: none;
  color: var(--text);
  background: #fff;
  transition: border var(--transition), box-shadow var(--transition);
}
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(23, 63, 53, .12);
}
.content-list {
  border-top: 1px solid var(--border);
}
.content-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}
.content-item:hover {
  border-color: #b7c4bd;
  background: rgba(255,255,255,.62);
}
.content-item h3 {
  margin-bottom: 8px;
  color: var(--primary);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.45;
}
.content-item p {
  display: -webkit-box;
  max-width: 760px;
  margin-bottom: 14px;
  overflow: hidden;
  color: var(--muted);
  line-height: 1.8;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}
.item-action {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
}
.item-action:hover {
  color: var(--accent);
}
.empty-state {
  padding: 52px 24px;
  border: 1px dashed #b8c3bd;
  border-radius: var(--radius);
  text-align: center;
  background: #fff;
}
.pagination a,
.pagination button {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--primary);
  background: #fff;
  font-weight: 700;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}
.pagination a:hover,
.pagination button:hover,
.pagination .current {
  border-color: var(--primary);
  color: #fff;
  background: var(--primary);
}
.use-case {
  padding: 24px;
  border-top: 3px solid var(--accent);
  border-radius: 0 0 var(--radius) var(--radius);
  background: #fff;
  box-shadow: 0 1px 0 var(--border);
}
.use-case h3 {
  margin-bottom: 8px;
  color: var(--primary);
  font-size: 20px;
  line-height: 1.45;
}
.use-case p {
  margin-bottom: 0;
  color: var(--muted);
}
.step-number {
  display: grid;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  background: #fff;
  font-weight: 800;
}
.faq-list {
  max-width: 900px;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-question {
  display: flex;
  width: 100%;
  min-height: 66px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
  border: 0;
  color: var(--primary);
  background: transparent;
  text-align: left;
  font-weight: 700;
}
.faq-icon {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}
.faq-question[aria-expanded="true"] .faq-icon {
  color: #fff;
  background: var(--primary);
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 44px 22px 0;
  color: var(--muted);
}
.feedback-section {
  border-top: 1px solid #cfd8d2;
  background: #e8eeea;
}
.feedback-form {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}
.form-label {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
}
.form-error {
  display: none;
  margin-top: 4px;
  color: var(--danger);
  font-size: 13px;
}
.has-error .form-control {
  border-color: var(--danger);
}
.has-error .form-error {
  display: block;
}
.form-message {
  min-height: 28px;
  margin: 12px 0 0;
  color: var(--success);
  font-size: 14px;
  font-weight: 700;
}
.site-footer {
  color: #fff;
  background: var(--primary);
}
.footer-link {
  display: flex;
  min-height: 44px;
  align-items: center;
  color: rgba(255,255,255,.72);
  transition: color var(--transition), transform var(--transition);
}
.footer-link:hover {
  color: #fff;
  transform: translateX(2px);
}
.mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  visibility: hidden;
  opacity: 0;
  background: rgba(16,46,39,.48);
  transition: opacity var(--transition), visibility var(--transition);
}
.mobile-overlay.open {
  visibility: visible;
  opacity: 1;
}
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 70;
  width: min(88vw, 360px);
  height: 100dvh;
  padding: 20px;
  overflow-y: auto;
  background: #fff;
  box-shadow: -8px 0 30px rgba(23,63,53,.16);
  transform: translateX(105%);
  transition: transform 220ms ease;
}
.mobile-menu.open {
  transform: translateX(0);
}
.mobile-nav-link {
  display: flex;
  min-height: 50px;
  align-items: center;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-weight: 700;
}
.mobile-nav-link.active {
  color: var(--primary);
}
.search-notice {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 80;
  max-width: min(360px, calc(100% - 40px));
  padding: 12px 16px;
  border-radius: 6px;
  color: #fff;
  background: var(--primary);
  box-shadow: var(--shadow);
}
@media (max-width: 1023px) {
  .filter-panel-body {
    display: none;
  }
  .filter-panel.open .filter-panel-body {
    display: block;
  }
  .coupon-board::after,
  .coupon-cut {
    display: none;
  }
}
@media (max-width: 767px) {
  .site-container {
    width: min(100% - 32px, 1240px);
  }
  .site-header {
    height: 60px;
  }
  .brand-name {
    max-width: 205px;
  }
  .section-space {
    padding-block: 56px;
  }
  .section-heading {
    margin-bottom: 24px;
  }
  .section-heading h2 {
    font-size: 27px;
  }
  .section-heading p {
    font-size: 16px;
  }
  .coupon-board {
    min-height: 0;
  }
  .coupon-side {
    width: 100%;
    flex-basis: auto;
    border-top: 1px dashed rgba(255,255,255,.35);
  }
  .content-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    padding: 22px 0;
  }
  .content-item h3 {
    font-size: 19px;
  }
  .faq-answer {
    padding-right: 0;
  }
}
@media (max-width: 520px) {
  .brand-name {
    max-width: 176px;
    font-size: 14px;
  }
  .logo-mark {
    width: 34px;
    height: 34px;
  }
  .btn-primary,
  .btn-secondary {
    width: 100%;
  }
  .page-actions {
    display: grid;
    width: 100%;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* roulang page: category2 */
:root {
  --primary: #173F35;
  --primary-dark: #102E27;
  --accent: #A5663F;
  --background: #F6F7F5;
  --surface: #FFFFFF;
  --text: #202622;
  --muted: #66716B;
  --border: #D9DEDA;
  --success: #2F725C;
  --danger: #A33A3A;
  --radius: 8px;
  --shadow: 0 6px 20px rgba(23, 63, 53, .08);
  --transition: 180ms ease;
}
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--background);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}
body.menu-open {
  overflow: hidden;
}
h1, h2, .brand-serif {
  font-family: "Songti SC", "SimSun", serif;
}
h1, h2, h3, p {
  overflow-wrap: anywhere;
}
a {
  color: inherit;
  text-decoration: none;
}
button, input, select, textarea {
  font: inherit;
  letter-spacing: 0;
}
button, a, input, select, textarea {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
button:disabled {
  cursor: not-allowed;
  opacity: .58;
}
img {
  display: block;
  max-width: 100%;
}
[hidden] {
  display: none !important;
}
::selection {
  color: #fff;
  background: var(--primary);
}
:focus-visible {
  outline: 3px solid rgba(165, 102, 63, .42);
  outline-offset: 3px;
}
.site-container {
  width: min(100% - 64px, 1240px);
  margin-inline: auto;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 72px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, .98);
  box-shadow: 0 2px 12px rgba(23, 63, 53, .03);
}
.nav-link {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0 12px;
  color: var(--muted);
  font-weight: 600;
  transition: color var(--transition), background var(--transition);
}
.nav-link::after {
  position: absolute;
  right: 12px;
  bottom: -14px;
  left: 12px;
  height: 2px;
  background: var(--primary);
  content: "";
  opacity: 0;
  transform: scaleX(.4);
  transition: opacity var(--transition), transform var(--transition);
}
.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}
.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}
.logo-mark {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 6px;
  color: #fff;
  background: var(--primary);
}
.search-shell {
  position: relative;
  width: 220px;
}
.search-input {
  width: 100%;
  height: 42px;
  padding: 0 42px 0 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  outline: none;
  color: var(--text);
  background: #fff;
  transition: border var(--transition), box-shadow var(--transition);
}
.search-input::placeholder {
  color: #7a857f;
}
.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(23, 63, 53, .12);
}
.search-submit {
  position: absolute;
  top: 3px;
  right: 3px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 0;
  border-radius: 5px;
  color: var(--primary);
  background: transparent;
  transition: background var(--transition);
}
.search-submit:hover {
  background: #edf2ef;
}
.btn-primary,
.btn-secondary {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--primary);
  border-radius: 6px;
  font-weight: 700;
  line-height: 1.4;
  transition: color var(--transition), background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.btn-primary {
  color: #fff;
  background: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.btn-secondary {
  color: var(--primary);
  background: #fff;
}
.btn-secondary:hover {
  background: #edf2ef;
  transform: translateY(-1px);
}
.btn-primary:active,
.btn-secondary:active {
  transform: translateY(0);
}
.section-space {
  padding-block: 88px;
}
.section-heading {
  margin-bottom: 32px;
}
.section-heading h2 {
  margin-bottom: 10px;
  color: var(--primary);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
}
.section-heading p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}
.eyebrow::before {
  width: 24px;
  height: 2px;
  background: var(--accent);
  content: "";
}
.page-heading {
  border-bottom: 1px solid var(--border);
  background: #eef2ef;
}
.breadcrumb a {
  color: var(--muted);
  transition: color var(--transition);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.heading-stat {
  min-width: 130px;
  padding: 14px 16px;
  border-left: 2px solid var(--accent);
  background: rgba(255,255,255,.68);
}
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 3px 14px rgba(23,63,53,.04);
}
.control-group {
  min-width: 180px;
  flex: 1 1 190px;
}
.control-label {
  display: block;
  margin-bottom: 6px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}
.form-control {
  width: 100%;
  min-height: 46px;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  outline: none;
  color: var(--text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(23,63,53,.12);
}
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-chip {
  min-height: 40px;
  padding: 7px 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  background: #fff;
  font-size: 14px;
  font-weight: 700;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.filter-chip:hover,
.filter-chip.active {
  border-color: var(--primary);
  color: var(--primary);
  background: #edf2ef;
}
.featured-entry {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}
.featured-entry::after {
  position: absolute;
  top: 0;
  right: 0;
  width: 112px;
  height: 112px;
  border-bottom: 1px solid rgba(165,102,63,.16);
  border-left: 1px solid rgba(165,102,63,.16);
  content: "";
  transform: translate(42px, -42px) rotate(45deg);
}
.status-badge,
.topic-badge {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--muted);
  background: #fff;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
}
.status-badge::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  content: "";
}
.topic-badge {
  border-color: rgba(165,102,63,.28);
  color: #804d30;
  background: #fbf6f2;
}
.entry-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  transition: color var(--transition), gap var(--transition);
}
.entry-link:hover {
  gap: 10px;
  color: var(--accent);
}
.timeline-group {
  position: relative;
  display: grid;
  grid-template-columns: 154px minmax(0, 1fr);
  gap: 32px;
}
.timeline-date {
  position: sticky;
  top: 96px;
  align-self: start;
}
.timeline-date strong {
  display: block;
  color: var(--primary);
  font-family: "Songti SC", "SimSun", serif;
  font-size: 20px;
}
.timeline-date span {
  color: var(--muted);
  font-size: 13px;
}
.timeline-list {
  position: relative;
  padding-left: 30px;
  border-left: 1px solid var(--border);
}
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  padding: 0 0 28px;
}
.timeline-item:last-child {
  padding-bottom: 8px;
}
.timeline-item::before {
  position: absolute;
  top: 9px;
  left: -36px;
  width: 11px;
  height: 11px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
  content: "";
}
.timeline-content {
  min-width: 0;
  padding: 2px 0 25px;
  border-bottom: 1px solid var(--border);
}
.timeline-item:hover .timeline-content h3 {
  color: var(--accent);
}
.timeline-title {
  display: -webkit-box;
  overflow: hidden;
  margin: 8px 0 7px;
  color: var(--primary);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  transition: color var(--transition);
}
.timeline-summary {
  display: -webkit-box;
  overflow: hidden;
  max-width: 780px;
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}
.timeline-action {
  padding-top: 34px;
  white-space: nowrap;
}
.empty-state {
  padding: 48px 20px;
  border: 1px dashed #aab4ae;
  border-radius: var(--radius);
  text-align: center;
  background: #fff;
}
.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}
.page-button {
  display: inline-grid;
  min-width: 44px;
  min-height: 44px;
  place-items: center;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--primary);
  background: #fff;
  font-weight: 700;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.page-button:hover,
.page-button.active {
  border-color: var(--primary);
  color: #fff;
  background: var(--primary);
}
.process-step {
  position: relative;
  padding: 22px 0 22px 56px;
  border-top: 1px solid var(--border);
}
.process-step:last-child {
  border-bottom: 1px solid var(--border);
}
.process-number {
  position: absolute;
  top: 24px;
  left: 0;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  font-weight: 800;
  background: #fff;
}
.faq-list {
  max-width: 880px;
}
.faq-item {
  border-top: 1px solid var(--border);
}
.faq-item:last-child {
  border-bottom: 1px solid var(--border);
}
.faq-button {
  display: flex;
  width: 100%;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 17px 0;
  border: 0;
  color: var(--primary);
  text-align: left;
  background: transparent;
  font-size: 18px;
  font-weight: 700;
}
.faq-button:hover {
  color: var(--accent);
}
.faq-icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
}
.faq-icon::before,
.faq-icon::after {
  position: absolute;
  top: 11px;
  left: 4px;
  width: 16px;
  height: 2px;
  background: currentColor;
  content: "";
  transition: transform var(--transition);
}
.faq-icon::after {
  transform: rotate(90deg);
}
.faq-button[aria-expanded="true"] .faq-icon::after {
  transform: rotate(0);
}
.faq-panel {
  overflow: hidden;
  max-height: 0;
  color: var(--muted);
  transition: max-height 200ms ease;
}
.faq-panel-inner {
  padding: 0 48px 22px 0;
}
.cross-link {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.cross-link:hover {
  border-color: #aab7b0;
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.feedback-band {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: #edf2ef;
}
.feedback-form {
  display: grid;
  grid-template-columns: minmax(150px, .7fr) minmax(210px, 1fr) minmax(260px, 1.6fr) auto;
  align-items: end;
  gap: 14px;
}
.field-error {
  display: none;
  margin-top: 5px;
  color: var(--danger);
  font-size: 12px;
}
.has-error .form-control {
  border-color: var(--danger);
}
.has-error .field-error {
  display: block;
}
.form-status {
  min-height: 28px;
  margin-top: 12px;
  color: var(--success);
  font-size: 14px;
  font-weight: 700;
}
.site-footer {
  color: #fff;
  background: var(--primary);
}
.footer-link {
  display: flex;
  min-height: 44px;
  align-items: center;
  color: rgba(255,255,255,.72);
  transition: color var(--transition), transform var(--transition);
}
.footer-link:hover {
  color: #fff;
  transform: translateX(2px);
}
.mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  visibility: hidden;
  background: rgba(16,46,39,.48);
  opacity: 0;
  transition: opacity var(--transition), visibility var(--transition);
}
.mobile-overlay.open {
  visibility: visible;
  opacity: 1;
}
.mobile-menu {
  position: absolute;
  top: 0;
  right: 0;
  width: min(88vw, 390px);
  height: 100%;
  overflow-y: auto;
  background: #fff;
  box-shadow: -8px 0 24px rgba(16,46,39,.16);
  transform: translateX(100%);
  transition: transform 220ms ease;
}
.mobile-overlay.open .mobile-menu {
  transform: translateX(0);
}
.mobile-nav-link {
  display: flex;
  min-height: 52px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-weight: 700;
}
.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--primary);
}
.mobile-nav-link.active::after {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
}
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  display: grid;
  width: 44px;
  height: 44px;
  visibility: hidden;
  place-items: center;
  border: 1px solid rgba(255,255,255,.26);
  border-radius: 6px;
  color: #fff;
  background: var(--primary);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), background var(--transition);
}
.back-to-top.show {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--primary-dark);
}
.search-notice {
  position: fixed;
  top: 84px;
  right: 24px;
  z-index: 55;
  max-width: min(390px, calc(100vw - 32px));
  padding: 13px 16px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  color: var(--text);
  background: #fff;
  box-shadow: var(--shadow);
}
@media (max-width: 1023px) {
  .site-container {
    width: min(100% - 48px, 1240px);
  }
  .section-space {
    padding-block: 72px;
  }
  .feedback-form {
    grid-template-columns: 1fr 1fr;
  }
  .feedback-form .message-field {
    grid-column: 1 / -1;
  }
  .feedback-form .submit-field {
    grid-column: 1 / -1;
  }
}
@media (max-width: 767px) {
  html {
    scroll-padding-top: 72px;
  }
  .site-container {
    width: min(100% - 32px, 1240px);
  }
  .site-header {
    height: 60px;
  }
  .brand-name {
    max-width: 210px;
  }
  .logo-mark {
    width: 36px;
    height: 36px;
  }
  .section-space {
    padding-block: 56px;
  }
  .section-heading {
    margin-bottom: 24px;
  }
  .section-heading h2 {
    font-size: 27px;
  }
  .section-heading p {
    font-size: 16px;
  }
  .toolbar {
    align-items: stretch;
    padding: 14px;
  }
  .control-group {
    min-width: 100%;
  }
  .filter-chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }
  .filter-chip {
    flex: 0 0 auto;
  }
  .timeline-group {
    display: block;
  }
  .timeline-date {
    position: static;
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent);
  }
  .timeline-list {
    padding-left: 0;
    border-left: 0;
  }
  .timeline-item {
    display: block;
    padding-bottom: 24px;
  }
  .timeline-item::before {
    display: none;
  }
  .timeline-content {
    padding-bottom: 17px;
  }
  .timeline-action {
    padding-top: 12px;
  }
  .cross-link {
    display: block;
    padding: 22px;
  }
  .cross-link .btn-secondary {
    width: 100%;
    margin-top: 18px;
  }
  .feedback-form {
    display: block;
  }
  .feedback-form > div {
    margin-bottom: 14px;
  }
  .feedback-form .btn-primary {
    width: 100%;
  }
  .faq-button {
    font-size: 17px;
  }
  .faq-panel-inner {
    padding-right: 0;
  }
  .page-button.optional {
    display: none;
  }
  .back-to-top {
    right: 16px;
    bottom: 16px;
  }
}
@media (max-width: 519px) {
  .brand-name {
    max-width: 180px;
    font-size: 14px !important;
  }
  .page-heading h1 {
    font-size: 31px;
  }
  .heading-stat {
    width: 100%;
  }
  .featured-entry {
    border-left-width: 3px;
  }
  .featured-entry::after {
    display: none;
  }
  .btn-primary,
  .btn-secondary {
    padding-inline: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}