/* roulang page: index */
:root {
  --primary: #3A6FD8;
  --primary-dark: #2B5BB8;
  --accent: #E7A07A;
  --bg: #F4F7FB;
  --ink: #1C2B3A;
  --muted: #5E6B7A;
  --line: #E3EAF3;
  --card: #ffffff;
  --radius: 16px;
  --shadow: 0 10px 28px rgba(36, 74, 140, 0.08);
  --shadow-hover: 0 16px 34px rgba(36, 74, 140, 0.14);
  --space: 72px;
  --nav-h: 78px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
:focus-visible { outline: 3px solid rgba(58, 111, 216, 0.45); outline-offset: 2px; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.35; text-align: left; margin: 0 0 12px; color: var(--ink); }
p { margin: 0 0 12px; }
.section-lead { color: var(--muted); max-width: 720px; margin-bottom: 28px; }
.site-header { position: sticky; top: 0; z-index: 1030; padding-top: 20px; transition: padding .25s ease; }
.site-header.is-stuck { padding-top: 0; }
.float-nav {
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 10px 14px 10px 18px;
  border: 1px solid rgba(227, 234, 243, 0.9);
  transition: border-radius .25s ease, box-shadow .25s ease;
}
.site-header.is-stuck .float-nav { border-radius: 0 0 16px 16px; box-shadow: 0 8px 22px rgba(36, 74, 140, 0.1); }
.navbar-brand { display: flex; align-items: center; gap: 10px; padding: 0; margin-right: 18px; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 12px; background: var(--primary); color: #fff;
  display: grid; place-items: center; font-weight: 700; letter-spacing: 0; flex: 0 0 auto;
}
.logo-text strong { display: block; color: var(--ink); font-size: 15px; line-height: 1.25; max-width: 9.2em; font-weight: 700; }
.logo-text small { display: block; color: var(--muted); font-size: 12px; line-height: 1.4; }
.navbar-nav { gap: 4px; }
.navbar-nav .nav-link {
  color: var(--ink); font-weight: 500; border-radius: 999px; padding: 8px 14px !important; background: transparent;
}
.navbar-nav .nav-link:hover { color: var(--primary); background: #F3F7FE; }
.navbar-nav .nav-link.active { color: var(--primary); font-weight: 700; background: transparent; }
.navbar-toggler { border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; }
.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(58, 111, 216, 0.25); }
.nav-cta { margin-left: 8px; }
.btn-brand, .btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; border-radius: 999px;
  padding: 10px 22px; font-weight: 700; line-height: 1.4; border: 1px solid transparent;
  transition: background .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn-brand { background: var(--primary); color: #fff; }
.btn-brand:hover, .btn-brand:focus { background: var(--primary-dark); color: #fff; }
.btn-brand:active { background: #234e9e; color: #fff; }
.btn-ghost { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-ghost:hover, .btn-ghost:focus { background: #F3F7FE; color: var(--primary-dark); }
.btn-ghost:active { background: #E7EEF9; }
main { display: block; }
.block { padding: var(--space) 0; }
.block-white { background: #fff; }
.block-mist { background: var(--bg); }
.block-soft { background: #EAF1FB; }
section[id] { scroll-margin-top: 110px; }
.age-line { color: var(--muted); font-size: 13px; letter-spacing: 0.04em; margin-bottom: 14px; }
.hero { padding: 36px 0 64px; }
.hero-copy { position: relative; z-index: 2; }
.hero h1 { font-size: clamp(32px, 4vw, 52px); margin: 8px 0 16px; }
.hero-lead { font-size: 16px; color: var(--muted); margin-bottom: 22px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 22px; }
.kpi-row { display: flex; flex-wrap: wrap; gap: 18px; }
.kpi-row div { min-width: 92px; }
.kpi-row strong { display: block; color: var(--primary); font-size: 22px; line-height: 1.2; }
.kpi-row span { color: var(--muted); font-size: 13px; }
.hero-visual { position: relative; margin-top: 28px; transform: translate(18px, 12px); }
.preview-back {
  position: absolute; inset: 22px -12px auto auto; width: 72%; height: 78%;
  background: #E7EEF9; border-radius: 20px; transform: rotate(-2deg);
}
.preview-frame {
  position: relative; background: #fff; border-radius: 20px; box-shadow: var(--shadow);
  padding: 18px 18px 16px; border: 1px solid var(--line);
}
.sprocket { height: 8px; background-image: radial-gradient(circle, var(--accent) 1.3px, transparent 1.45px); background-size: 16px 8px; background-repeat: repeat-x; opacity: 0.85; }
.preview-head { display: flex; justify-content: space-between; align-items: center; margin: 12px 0; }
.preview-head b { font-size: 16px; }
.tag {
  display: inline-flex; align-items: center; border-radius: 999px; padding: 2px 10px;
  background: rgba(231, 160, 122, 0.2); color: #8A4E32; font-size: 12px; font-weight: 700;
}
.preview-row {
  display: grid; grid-template-columns: 72px 1fr auto; gap: 12px; align-items: center;
  padding: 10px 0; border-top: 1px solid var(--line);
}
.swatch { height: 48px; border-radius: 10px; }
.swatch-a { background: #3A6FD8; }
.swatch-b { background: #E7A07A; }
.swatch-c { background: #7EA0E4; }
.preview-row small { display: block; color: var(--muted); font-size: 12px; }
.meter { width: 72px; height: 6px; border-radius: 999px; background: #E7EEF9; overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--accent); }
.entry-grid {
  display: grid; grid-template-columns: 1.45fr 1fr; grid-template-rows: 180px 150px auto; gap: 16px;
}
.entry-card {
  display: flex; flex-direction: column; justify-content: flex-end; min-height: 140px;
  border-radius: var(--radius); padding: 22px; color: #fff; box-shadow: var(--shadow);
  position: relative; overflow: hidden; transition: transform .2s ease, box-shadow .2s ease;
}
.entry-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: #fff; }
.entry-card span { font-size: 13px; opacity: 0.9; }
.entry-card strong { font-size: 28px; line-height: 1.25; }
.entry-a { grid-row: 1 / 3; background: #3A6FD8; }
.entry-b { background: #2B5BB8; }
.entry-c { background: #D98962; color: #1C2B3A; }
.entry-c:hover { color: #1C2B3A; }
.entry-d { grid-column: 1 / 3; background: #fff; color: var(--ink); border: 1px solid var(--line); min-height: 120px; }
.entry-d:hover { color: var(--ink); }
.notch::after {
  content: ""; position: absolute; left: 16px; right: 16px; top: 12px; height: 6px;
  background-image: radial-gradient(circle, rgba(255,255,255,.7) 1.2px, transparent 1.3px);
  background-size: 12px 6px;
}
.entry-d.notch::after { background-image: radial-gradient(circle, var(--accent) 1.2px, transparent 1.3px); }
.heat-track { display: flex; gap: 14px; overflow-x: auto; padding: 4px 2px 12px; scroll-snap-type: x mandatory; }
.heat-item {
  flex: 0 0 240px; scroll-snap-align: start; background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1px solid var(--line); overflow: hidden; color: var(--ink);
  transition: transform .2s ease, box-shadow .2s ease;
}
.heat-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.heat-cover { height: 92px; display: flex; align-items: flex-end; padding: 12px; color: #fff; font-weight: 700; }
.heat-item p { padding: 12px 14px 14px; color: var(--muted); font-size: 14px; margin: 0; }
.stat-layout { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 28px; align-items: center; }
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; border: 1px solid var(--line); }
.stat-card b { display: block; color: var(--primary); font-size: 40px; line-height: 1; margin-bottom: 8px; }
.stat-card span { color: var(--muted); font-size: 14px; }
.note { font-size: 12px; color: var(--accent); font-weight: 700; }
.flow-line { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; position: relative; }
.flow-step { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; border-top: 3px solid var(--primary); }
.flow-step em { display: block; font-style: normal; color: var(--accent); font-weight: 700; font-size: 13px; }
.flow-step h3 { font-size: 20px; margin: 6px 0; }
.flow-step p { color: var(--muted); margin: 0; font-size: 14px; }
.case-wall { columns: 3; column-gap: 16px; }
.case-card {
  break-inside: avoid; margin: 0 0 16px; background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; display: block; color: var(--ink); border: 1px solid var(--line);
  transition: transform .2s ease, box-shadow .2s ease;
}
.case-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.cover { display: flex; align-items: flex-end; padding: 16px; color: #fff; font-weight: 700; font-size: 18px; }
.cover.tall { min-height: 210px; }
.cover.mid { min-height: 160px; }
.cover.short { min-height: 128px; }
.cover.c1 { background: #3A6FD8; }
.cover.c2 { background: #E7A07A; color: #1C2B3A; }
.cover.c3 { background: #2B5BB8; }
.cover.c4 { background: #7EA0E4; }
.cover.c5 { background: #D98962; color: #1C2B3A; }
.cover.c6 { background: #3A6FD8; }
.cover.c7 { background: #5C86DE; }
.cover.c8 { background: #F0C2A8; color: #1C2B3A; }
.case-body { padding: 14px 16px 16px; }
.case-body h3 { font-size: 18px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.meta i { font-style: normal; font-size: 12px; color: var(--muted); background: #F4F7FB; border-radius: 999px; padding: 2px 8px; }
.case-body p { color: var(--muted); font-size: 14px; margin: 0; }
.scene-grid { display: grid; grid-template-columns: 1.15fr 0.8fr 1fr; gap: 16px; align-items: start; }
.scene-card {
  display: block; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 22px; border: 1px solid var(--line); color: var(--ink);
  transition: transform .2s ease, box-shadow .2s ease;
}
.scene-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.scene-card:nth-child(1) { min-height: 280px; }
.scene-card:nth-child(2) { min-height: 210px; margin-top: 36px; }
.scene-card:nth-child(3) { min-height: 250px; }
.scene-card h3 { font-size: 22px; }
.scene-card p { color: var(--muted); margin: 0; }
.compare-table { width: 100%; border-collapse: separate; border-spacing: 0; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.compare-table th, .compare-table td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.compare-table th { background: #F7FAFE; color: var(--primary); font-size: 18px; }
.compare-table td:first-child { width: 120px; color: var(--ink); font-weight: 700; background: #FBFCFE; }
.compare-table tr:last-child td { border-bottom: 0; }
.news-feature, .news-item {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--line); color: var(--ink);
  transition: transform .2s ease, box-shadow .2s ease;
}
.news-item { display: block; padding: 16px 18px; margin-bottom: 12px; }
.news-item:hover, .news-feature:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.news-feature { display: flex; flex-direction: column; min-height: 100%; padding: 18px; }
.news-cover { border-radius: 12px; min-height: 160px; background: #3A6FD8; color: #fff; display: flex; align-items: flex-end; padding: 16px; font-weight: 700; margin-bottom: 14px; }
.news-item h3, .news-feature h3 { font-size: 18px; }
.news-item p, .news-feature p { color: var(--muted); margin: 0; font-size: 14px; }
.partner-row { display: flex; flex-wrap: wrap; gap: 10px; }
.partner-row span {
  background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 10px 16px;
  box-shadow: var(--shadow); color: var(--ink); font-weight: 700;
}
.accordion { --bs-accordion-border-width: 0; --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(58,111,216,.25); }
.accordion-item { background: #fff; border: 1px solid var(--line) !important; border-radius: var(--radius) !important; box-shadow: var(--shadow); margin-bottom: 12px; overflow: hidden; }
.accordion-button { font-weight: 700; color: var(--ink); background: #fff; padding: 16px 18px; }
.accordion-button:not(.collapsed) { color: var(--primary); background: #fff; box-shadow: none; }
.accordion-button::after { background-size: 14px; }
.accordion-body { color: var(--muted); padding: 0 18px 16px; }
.assure-bar { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; background: #fff; border-radius: 20px; box-shadow: var(--shadow); padding: 22px; border: 1px solid var(--line); }
.assure-bar h3 { font-size: 18px; }
.assure-bar p { color: var(--muted); margin: 0; font-size: 14px; }
.timeline { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; }
.day {
  display: block; background: #fff; border-radius: 14px; min-height: 150px; padding: 14px 12px;
  box-shadow: var(--shadow); border: 1px solid var(--line); color: var(--ink);
  transition: transform .2s ease, box-shadow .2s ease;
}
.day:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.day b { display: block; color: var(--primary); margin-bottom: 8px; }
.day span { color: var(--muted); font-size: 14px; }
.form-card { background: #fff; border-radius: 20px; box-shadow: var(--shadow); padding: 22px; border: 1px solid var(--line); }
.form-label { font-weight: 700; color: var(--ink); }
.form-control, .form-select {
  border: 1px solid var(--line); border-radius: 12px; background: #fff; color: var(--ink); min-height: 46px;
}
.form-control:focus, .form-select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(58, 111, 216, 0.25); }
.form-note { color: var(--muted); font-size: 13px; }
.form-ok { display: none; margin-top: 12px; color: var(--primary-dark); font-weight: 700; }
.site-footer { background: #fff; border-top: 1px solid var(--line); padding: 28px 0 36px; }
.footer-brand { font-weight: 700; font-size: 18px; color: var(--ink); }
.footer-meta { color: var(--muted); font-size: 14px; }
.footer-meta a { font-weight: 700; }
.domain-line { font-size: 12px; color: #8A97A6; margin: 8px 0 0; }
@media (max-width: 1199.98px) {
  .case-wall { columns: 2; }
  .timeline { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 991.98px) {
  :root { --space: 40px; }
  .navbar-collapse { margin-top: 10px; background: #fff; border-radius: 16px; padding: 8px; }
  .nav-cta { margin: 8px 0 4px; width: 100%; }
  .hero-visual { transform: none; margin-top: 28px; }
  .entry-grid, .stat-layout, .flow-line, .scene-grid, .assure-bar { grid-template-columns: 1fr; }
  .entry-a, .entry-b, .entry-c, .entry-d { grid-column: auto; grid-row: auto; }
  .scene-card:nth-child(2) { margin-top: 0; }
  .hero-actions .btn, .form-card .btn { width: 100%; }
  .timeline { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 575.98px) {
  .case-wall { columns: 1; }
  .stat-grid, .timeline { grid-template-columns: 1fr; }
  .logo-text strong { font-size: 14px; }
  .hero { padding-top: 18px; }
  .preview-row { grid-template-columns: 56px 1fr; }
  .meter { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* roulang page: category2 */
:root {
  --primary: #3A6FD8;
  --primary-dark: #2B5BB8;
  --accent: #E7A07A;
  --bg: #F4F7FB;
  --ink: #1C2B3A;
  --muted: #5E6B7A;
  --line: #E3EAF3;
  --card: #ffffff;
  --radius: 16px;
  --shadow: 0 10px 28px rgba(36, 74, 140, 0.08);
  --shadow-hover: 0 16px 34px rgba(36, 74, 140, 0.14);
  --space: 72px;
  --nav-h: 78px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: 3px solid rgba(58, 111, 216, 0.35);
  outline-offset: 2px;
}
h1, h2, h3 { font-weight: 700; line-height: 1.35; margin: 0 0 12px; letter-spacing: 0; text-align: left; overflow-wrap: break-word; }
p { margin: 0 0 12px; }
.container { width: min(1140px, calc(100% - 32px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 1030; padding-top: 20px; transition: padding .25s ease; }
.site-header.is-stuck { padding-top: 0; }
.float-nav {
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 10px 14px 10px 18px;
  border: 1px solid rgba(227, 234, 243, 0.9);
  transition: border-radius .25s ease, box-shadow .25s ease;
}
.site-header.is-stuck .float-nav { border-radius: 0 0 16px 16px; box-shadow: 0 8px 22px rgba(36, 74, 140, 0.1); }
.navbar-brand { display: flex; align-items: center; gap: 10px; padding: 0; margin-right: 18px; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 12px; background: var(--primary); color: #fff;
  display: grid; place-items: center; font-weight: 700; flex: 0 0 auto;
}
.logo-text strong { display: block; color: var(--ink); font-size: 15px; line-height: 1.25; max-width: 9.2em; font-weight: 700; }
.logo-text small { display: block; color: var(--muted); font-size: 12px; line-height: 1.4; }
.navbar-nav { gap: 4px; align-items: center; }
.navbar-nav .nav-link {
  color: var(--ink); font-weight: 500; border-radius: 999px; padding: 8px 14px !important; background: transparent;
}
.navbar-nav .nav-link:hover { color: var(--primary); background: #F3F7FE; }
.navbar-nav .nav-link.active { color: var(--primary); font-weight: 700; background: transparent; }
.navbar-toggler { border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; }
.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(58, 111, 216, 0.25); }
.nav-cta { margin-left: 8px; }
.btn-brand, .btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; border-radius: 999px;
  padding: 10px 22px; font-weight: 700; line-height: 1.4; border: 1px solid transparent;
  transition: background .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn-brand { background: var(--primary); color: #fff; }
.btn-brand:hover, .btn-brand:focus { background: var(--primary-dark); color: #fff; }
.btn-brand:active { background: #234e9e; color: #fff; }
.btn-ghost { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-ghost:hover, .btn-ghost:focus { background: #F3F7FE; color: var(--primary-dark); }
.btn-ghost:active { background: #E7EEF9; }
main { display: block; }
section[id] { scroll-margin-top: 110px; }
.block { padding: var(--space) 0; }
.block.alt { background: #fff; }
.block.tight { padding-top: 28px; }
.age-note {
  display: inline-flex; align-items: center; gap: 8px; color: #8A4E32; font-size: 12px; font-weight: 700;
  background: rgba(231, 160, 122, 0.2); border-radius: 999px; padding: 3px 10px; margin-bottom: 14px;
}
.crumb { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--primary); }
.cat-head { position: relative; padding-top: 36px; }
.cat-head h1 { font-size: clamp(32px, 4vw, 48px); max-width: 16em; }
.cat-lead { color: var(--muted); max-width: 640px; margin: 0; }
.sprocket {
  height: 10px; margin-top: 22px; max-width: 280px;
  background-image: radial-gradient(circle, rgba(58, 111, 216, 0.28) 3px, transparent 3.5px);
  background-size: 18px 10px; background-repeat: repeat-x;
}
.filter-panel {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px 18px 8px;
}
.filter-row { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; margin-bottom: 12px; }
.filter-row b { min-width: 72px; font-size: 14px; }
.chip {
  border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 999px;
  padding: 6px 14px; font-size: 14px; line-height: 1.4; cursor: default;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.is-on { background: var(--primary); border-color: var(--primary); color: #fff; }
.chip:active { transform: translateY(1px); }
.section-kicker { color: var(--accent); font-size: 13px; font-weight: 700; margin-bottom: 6px; }
.section-title { font-size: 28px; }
.section-lead { color: var(--muted); max-width: 640px; }
.cover-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cover-card {
  display: block; background: var(--card); color: var(--ink); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; min-width: 0;
  transition: transform .2s ease, box-shadow .2s ease;
}
.cover-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.thumb {
  min-height: 132px; display: flex; align-items: flex-end; padding: 16px;
  font-weight: 700; font-size: 20px; position: relative;
}
.thumb.tall { min-height: 168px; }
.thumb span { position: relative; z-index: 1; }
.thumb::after {
  content: ""; position: absolute; left: 16px; right: 16px; top: 14px; height: 8px;
  background-image: radial-gradient(circle, rgba(255,255,255,.45) 2px, transparent 2.5px);
  background-size: 14px 8px;
}
.c1 { background: #3A6FD8; color: #fff; }
.c2 { background: #E7F0FF; color: var(--ink); }
.c2::after { background-image: radial-gradient(circle, rgba(58,111,216,.35) 2px, transparent 2.5px); }
.c3 { background: #F8E7DC; color: #6B3E28; }
.c3::after { background-image: radial-gradient(circle, rgba(138,78,50,.35) 2px, transparent 2.5px); }
.c4 { background: #2B5BB8; color: #fff; }
.cover-body { padding: 14px 16px 16px; }
.cover-body h3 { font-size: 18px; margin-bottom: 8px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.meta i {
  font-style: normal; font-size: 12px; color: var(--muted); background: #F4F7FB;
  border-radius: 999px; padding: 2px 8px;
}
.cover-body p { color: var(--muted); font-size: 14px; margin: 0; }
.more-row { display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.more-row p { margin: 0; color: var(--muted); }
.split { display: grid; grid-template-columns: 280px 1fr; gap: 32px; align-items: start; }
.spec-list { margin: 0; }
.spec-list div {
  display: grid; grid-template-columns: 88px 1fr; gap: 12px;
  padding: 14px 0; border-top: 1px solid var(--line);
}
.spec-list div:first-child { border-top: 0; padding-top: 0; }
.spec-list dt { font-weight: 700; color: var(--primary); }
.spec-list dd { margin: 0; color: var(--ink); }
.article-list { display: flex; flex-direction: column; gap: 12px; }
.article-link {
  display: grid; grid-template-columns: 72px 1fr auto; gap: 14px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 14px 16px; color: var(--ink);
  transition: transform .2s ease, box-shadow .2s ease;
}
.article-link:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.article-link b { color: var(--primary); font-size: 13px; }
.article-link strong { display: block; font-size: 17px; }
.article-link small { color: var(--muted); }
.article-link em { font-style: normal; color: #8A4E32; background: rgba(231,160,122,.2); border-radius: 999px; padding: 2px 8px; font-size: 12px; font-weight: 700; }
.accordion { --bs-accordion-border-width: 0; --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(58,111,216,.25); }
.accordion-item {
  border: 1px solid var(--line) !important; border-radius: var(--radius) !important;
  box-shadow: var(--shadow); margin-bottom: 12px; overflow: hidden; background: #fff;
}
.accordion-button {
  font-weight: 700; color: var(--ink); background: #fff; box-shadow: none; padding: 16px 18px;
}
.accordion-button:not(.collapsed) { color: var(--primary); background: #fff; box-shadow: none; }
.accordion-button:hover { color: var(--primary); }
.accordion-body { color: var(--muted); padding: 0 18px 16px; }
.cta-band {
  background: var(--primary); color: #fff; border-radius: 20px; padding: 36px 32px;
  display: flex; justify-content: space-between; gap: 20px; align-items: center;
  box-shadow: var(--shadow);
}
.cta-band h2 { color: #fff; font-size: 30px; }
.cta-band p { color: rgba(255,255,255,.88); margin: 0; max-width: 520px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.cta-band .btn-ghost { background: #fff; }
.site-footer { padding: 28px 0 36px; color: var(--muted); }
.footer-brand { color: var(--ink); font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.footer-meta { margin: 0; font-size: 14px; }
.footer-meta a { margin-left: 8px; }
.domain-line { font-size: 12px; color: #8A97A6; margin: 8px 0 0; }
@media (max-width: 1199.98px) {
  .section-title { font-size: 26px; }
}
@media (max-width: 991.98px) {
  .navbar-collapse { margin-top: 10px; padding: 8px; background: #f8fbff; border-radius: 16px; }
  .navbar-nav { align-items: stretch; }
  .navbar-nav .nav-link { width: 100%; }
  .nav-cta { width: 100%; margin: 8px 0 0; }
  .split, .more-row, .cta-band { grid-template-columns: 1fr; display: block; }
  .cta-actions { margin-top: 16px; }
  .article-link { grid-template-columns: 64px 1fr; }
  .article-link em { display: none; }
}
@media (max-width: 767.98px) {
  :root { --space: 40px; }
  .container { width: min(1140px, calc(100% - 24px)); }
  .cover-grid { grid-template-columns: 1fr; }
  .spec-list div { grid-template-columns: 72px 1fr; }
  .cta-band { padding: 24px 18px; }
  .cta-band h2 { font-size: 24px; }
}
@media (max-width: 520px) {
  .logo-text strong { font-size: 13px; max-width: 8.4em; }
  .btn-brand, .btn-ghost, .cta-actions .btn, .more-row .btn { width: 100%; }
  .filter-row b { width: 100%; }
  .cat-head h1 { font-size: 30px; }
  .thumb { min-height: 112px; font-size: 18px; }
}

/* roulang page: category1 */
:root {
  --primary: #3A6FD8;
  --primary-dark: #2B5BB8;
  --accent: #E7A07A;
  --bg: #F4F7FB;
  --ink: #1C2B3A;
  --muted: #5E6B7A;
  --line: #E3EAF3;
  --card: #ffffff;
  --radius: 16px;
  --shadow: 0 10px 28px rgba(36, 74, 140, 0.08);
  --shadow-hover: 0 16px 34px rgba(36, 74, 140, 0.14);
  --space: 72px;
  --nav-h: 78px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1, h2, h3 { font-weight: 700; letter-spacing: 0; text-align: left; }
.site-header { position: sticky; top: 0; z-index: 1030; padding-top: 20px; transition: padding .25s ease; }
.site-header.is-stuck { padding-top: 0; }
.float-nav {
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 10px 14px 10px 18px;
  border: 1px solid rgba(227, 234, 243, 0.9);
  transition: border-radius .25s ease, box-shadow .25s ease;
}
.site-header.is-stuck .float-nav { border-radius: 0 0 16px 16px; box-shadow: 0 8px 22px rgba(36, 74, 140, 0.1); }
.navbar-brand { display: flex; align-items: center; gap: 10px; padding: 0; margin-right: 18px; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 12px; background: var(--primary); color: #fff;
  display: grid; place-items: center; font-weight: 700; letter-spacing: 0; flex: 0 0 auto;
}
.logo-text strong { display: block; color: var(--ink); font-size: 15px; line-height: 1.25; max-width: 10em; font-weight: 700; white-space: normal; }
.logo-text small { display: block; color: var(--muted); font-size: 12px; line-height: 1.4; }
.navbar-nav { gap: 4px; align-items: center; }
.navbar-nav .nav-link {
  color: var(--ink); font-weight: 500; border-radius: 999px; padding: 8px 14px !important; background: transparent;
}
.navbar-nav .nav-link:hover { color: var(--primary); background: #F3F7FE; }
.navbar-nav .nav-link.active { color: var(--primary); font-weight: 700; background: transparent; }
.navbar-toggler { border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; }
.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(58, 111, 216, 0.25); }
.nav-cta { margin-left: 8px; }
.btn-brand, .btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; border-radius: 999px;
  padding: 10px 22px; font-weight: 700; line-height: 1.4; border: 1px solid transparent;
  transition: background .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn-brand { background: var(--primary); color: #fff; }
.btn-brand:hover, .btn-brand:focus { background: var(--primary-dark); color: #fff; }
.btn-brand:active { background: #234e9e; color: #fff; }
.btn-ghost { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-ghost:hover, .btn-ghost:focus { background: #F3F7FE; color: var(--primary-dark); }
.btn-ghost:active { background: #E7EEF9; }
.btn-brand:focus-visible, .btn-ghost:focus-visible, .chip:focus-visible, .sheet:focus-visible, .article-card:focus-visible {
  outline: 3px solid rgba(58, 111, 216, 0.35); outline-offset: 2px;
}
main { display: block; }
section { padding: var(--space) 0; }
section[id] { scroll-margin-top: 110px; }
.page-head { padding: 28px 0 12px; background: transparent; }
.page-head h1 { font-size: clamp(32px, 4vw, 46px); line-height: 1.25; margin: 10px 0 8px; }
.scope { color: var(--muted); margin: 0 0 14px; max-width: 40em; }
.crumb { display: flex; gap: 8px; align-items: center; color: var(--muted); font-size: 13px; margin: 0; }
.crumb a { color: var(--primary); font-weight: 700; }
.crumb span { color: var(--ink); }
.age-line { margin: 0 0 8px; }
.tag {
  display: inline-flex; align-items: center; border-radius: 999px; padding: 2px 10px;
  background: rgba(231, 160, 122, 0.2); color: #8A4E32; font-size: 12px; font-weight: 700;
}
.section-title { font-size: 28px; line-height: 1.3; margin: 0 0 8px; }
.section-title::after {
  content: ""; display: block; width: 48px; height: 3px; margin-top: 10px;
  background: var(--accent); border-radius: 999px;
}
.section-lead { color: var(--muted); max-width: 720px; margin: 0 0 22px; }
.filter-sec { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.filter-bar { display: flex; flex-wrap: wrap; gap: 18px 28px; }
.filter-group { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.filter-group > span { color: var(--ink); font-weight: 700; margin-right: 4px; }
.chip {
  border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 999px;
  padding: 6px 14px; font-weight: 700; line-height: 1.4; cursor: default;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.is-on { background: var(--primary); border-color: var(--primary); color: #fff; }
.list-sec { background: var(--bg); padding-bottom: 28px; }
.list-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.sheet {
  display: block; background: var(--card); color: var(--ink); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.sheet:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.cover {
  min-height: 148px; display: flex; align-items: flex-end; padding: 16px;
  color: #fff; font-weight: 700; font-size: 22px; position: relative;
}
.cover::before {
  content: ""; position: absolute; left: 0; right: 0; top: 10px; height: 8px;
  background-image: radial-gradient(circle, rgba(255,255,255,.55) 2px, transparent 2.5px);
  background-size: 14px 8px; background-repeat: repeat-x; opacity: .7;
}
.cover.c1 { background: #3A6FD8; }
.cover.c2 { background: #2B5BB8; }
.cover.c3 { background: #E7A07A; color: #1C2B3A; }
.cover.c4 { background: #5C86D6; }
.cover.c5 { background: #6E8FB8; }
.cover.c6 { background: #D98962; color: #1C2B3A; }
.cover.c7 { background: #3A6FD8; }
.cover.c8 { background: #244E9A; }
.sheet-body { padding: 14px 16px 16px; }
.sheet-body h3 { font-size: 18px; margin: 0 0 8px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; }
.meta i { font-style: normal; font-size: 12px; color: var(--muted); background: #F4F7FB; border-radius: 999px; padding: 2px 8px; }
.sheet-body p { color: var(--muted); font-size: 14px; margin: 0; }
.more-sec { background: var(--bg); padding-top: 8px; }
.more-line { color: var(--muted); margin: 0 0 14px; }
.clarity-sec { background: #fff; }
.spec { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0; }
.spec div { background: var(--bg); border-radius: 12px; padding: 16px 18px; border: 1px solid var(--line); }
.spec dt { font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.spec dd { margin: 0; color: var(--ink); }
.article-sec { background: var(--bg); }
.article-layout { display: grid; grid-template-columns: 1.35fr 0.85fr; gap: 16px; align-items: stretch; }
.article-card {
  display: flex; flex-direction: column; justify-content: flex-end; min-height: 180px;
  background: #fff; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow);
  padding: 18px; color: var(--ink); transition: transform .2s ease, box-shadow .2s ease;
}
.article-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.article-card strong { display: block; font-size: 22px; line-height: 1.35; margin: 8px 0; }
.article-card p { margin: 0; color: var(--muted); font-size: 14px; }
.article-side { display: grid; gap: 16px; }
.article-feature { min-height: 100%; background: #3A6FD8; color: #fff; }
.article-feature p, .article-feature .tag { color: #fff; }
.article-feature .tag { background: rgba(255,255,255,.18); }
.faq-sec { background: #fff; }
.accordion { --bs-accordion-border-width: 0; --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(58,111,216,.25); }
.accordion-item {
  border: 1px solid var(--line) !important; border-radius: 16px !important; overflow: hidden;
  margin-bottom: 12px; background: #fff; box-shadow: var(--shadow);
}
.accordion-button {
  font-weight: 700; color: var(--ink); background: #fff; box-shadow: none; padding: 16px 18px;
}
.accordion-button:not(.collapsed) { color: var(--primary); background: #fff; box-shadow: none; }
.accordion-button::after { filter: none; }
.accordion-body { color: var(--muted); padding: 0 18px 16px; }
.cta-sec { background: var(--bg); }
.cta-band {
  background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow);
  padding: 28px; display: flex; justify-content: space-between; gap: 18px; align-items: center;
}
.cta-band h2 { margin-bottom: 8px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; flex: 0 0 auto; }
.site-footer { background: #fff; border-top: 1px solid var(--line); padding: 28px 0 32px; }
.footer-brand { font-weight: 700; font-size: 18px; margin-bottom: 6px; }
.footer-meta { color: var(--muted); margin: 0 0 6px; }
.footer-meta a { font-weight: 700; }
.domain-line { margin: 0; color: var(--muted); font-size: 12px; }
@media (max-width: 991.98px) {
  .navbar-collapse { margin-top: 10px; padding: 8px 4px 4px; background: #fff; border-radius: 16px; }
  .nav-cta { margin: 8px 0 4px; width: 100%; }
  .article-layout, .cta-band { grid-template-columns: 1fr; display: grid; }
  .cta-band { align-items: flex-start; }
}
@media (max-width: 768px) {
  :root { --space: 40px; }
  .list-grid, .spec { grid-template-columns: 1fr; }
  .page-head h1 { font-size: 32px; }
  .section-title { font-size: 24px; }
}
@media (max-width: 576px) {
  .float-nav { border-radius: 16px; padding: 10px; }
  .logo-text strong { font-size: 14px; }
  .cta-actions .btn-brand, .cta-actions .btn-ghost, .more-sec .btn-ghost { width: 100%; }
  .cover { min-height: 120px; }
}
@media (max-width: 520px) {
  body { font-size: 15px; }
  .sheet-body h3, .article-card strong { font-size: 17px; }
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}