/* roulang page: index */
:root {
  --c-primary: #2E6F9E;
  --c-primary-dark: #245a80;
  --c-accent: #4E4A78;
  --c-bg: #F3F6FA;
  --c-alt: #E7EEF6;
  --c-text: #1C2833;
  --c-muted: #5C6B7A;
  --c-line: rgba(28, 40, 51, .08);
  --c-card: #ffffff;
  --c-footer: #D5DEE8;
  --c-danger: #8E2F3A;
  --radius: 12px;
  --radius-btn: 10px;
  --shadow: 0 8px 24px rgba(28, 40, 51, .08);
  --container: 1120px;
  --pad: 72px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
}
h1, h2, h3, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
img, svg { display: block; max-width: 100%; }
:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 2px; }
.container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
h1 { font-size: 40px; line-height: 1.28; font-weight: 700; }
h2 { font-size: 26px; line-height: 1.35; font-weight: 700; }
h3 { font-size: 18px; line-height: 1.5; font-weight: 700; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: #fff;
  border-bottom: 1px solid var(--c-line);
}
.header-top-inner, .header-actions, .hero-actions {
  display: flex;
  align-items: center;
}
.header-top-inner { justify-content: space-between; gap: 16px; min-height: 72px; }
.logo { font-size: 18px; font-weight: 700; letter-spacing: 0; white-space: nowrap; }
.header-actions, .hero-actions { gap: 10px; flex-shrink: 0; }
.header-tabs { padding: 0 0 12px; }
.seg {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}
.chip {
  flex: 0 0 auto;
  border: 1px solid var(--c-line);
  background: #fff;
  color: var(--c-text);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 14px;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}
.chip:hover { background: var(--c-alt); }
.chip.is-on, .chip[aria-current="page"] {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-1px); }
.btn-primary:active, .btn-ghost:active { transform: translateY(0); }
.btn-ghost { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
.btn-ghost:hover { background: var(--c-alt); }
.section { padding: var(--pad) 0; }
.band { background: var(--c-alt); }
.section-head { margin-bottom: 28px; text-align: left; }
.lead { margin-top: 14px; color: var(--c-muted); max-width: 760px; }
.sub { margin-top: 14px; font-size: 18px; line-height: 1.6; }
.hero { padding: 56px 0 72px; }
.hero-grid, .news-layout, .compare-grid, .contact-box, .matrix {
  display: grid;
  gap: 22px;
}
.hero-grid { grid-template-columns: 1.35fr .85fr; align-items: stretch; }
.hero-copy .lead { margin-top: 18px; color: var(--c-text); }
.hero-actions { margin-top: 22px; }
.panel, .card, .cell, .entry-card, .scene, .case-card, .feature, .pick, .col-card, .faq-item, .contact-box, .brand-row li {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.panel { padding: 22px; }
.panel-kicker { color: var(--c-accent); font-size: 14px; font-weight: 700; }
.sync-count { margin: 10px 0 16px; }
.sync-count strong {
  display: block;
  font-size: 40px;
  line-height: 1;
  color: var(--c-primary);
  font-weight: 700;
}
.sync-count span { color: var(--c-muted); font-size: 14px; }
.point-list li {
  border-left: 3px solid var(--c-primary);
  padding: 8px 0 8px 12px;
  margin-top: 8px;
}
.point-list strong { display: block; font-size: 16px; }
.point-list span { display: block; color: var(--c-muted); font-size: 14px; }
.entry-grid, .stats, .steps, .scenes, .promise-row {
  display: grid;
  gap: 22px;
}
.entry-grid { grid-template-columns: 1fr 1fr; }
.entry-card { display: block; padding: 22px; transition: transform 180ms ease, box-shadow 180ms ease; }
.entry-card:hover, .cell:hover, .scene:hover, .case-card:hover, .pick:hover, .feature:hover {
  transform: translateY(-1px);
}
.entry-card p, .cell p, .scene p, .case-card p, .pick p, .col-card p, .brand-row p, .feature p {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 16px;
}
.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--c-accent);
  color: var(--c-accent);
  border-radius: 999px;
  padding: 1px 8px;
  font-size: 12px;
  line-height: 1.6;
  background: #fff;
}
.badge-solid { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }
.badge-blue { border-color: var(--c-primary); color: var(--c-primary); }
.matrix { grid-template-columns: 1.45fr .9fr; grid-template-rows: 1fr 1fr 1fr; }
.cell { padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.cell-lg { grid-row: 1 / span 3; padding: 22px; }
.media { width: 100%; height: auto; border-radius: var(--radius); }
.swatch { height: 74px; border-radius: var(--radius); }
.tone-a { background: #2E6F9E; }
.tone-b { background: #4E4A78; }
.tone-c { background: #D7E6F2; }
.text-link { color: var(--c-primary); font-size: 14px; font-weight: 700; margin-top: auto; }
.text-link:hover { text-decoration: underline; }
.stats { grid-template-columns: repeat(4, 1fr); }
.stat { padding: 8px 4px; }
.stat-num { font-size: 40px; line-height: 1.1; color: var(--c-primary); font-weight: 700; }
.stat-label { display: block; margin-top: 8px; color: var(--c-muted); font-size: 14px; }
.steps { grid-template-columns: repeat(4, 1fr); position: relative; }
.steps::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 6%;
  right: 6%;
  height: 1px;
  background: rgba(28, 40, 51, .16);
}
.step { position: relative; padding-top: 8px; }
.step-no {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.step p { margin-top: 6px; color: var(--c-muted); }
.scenes { grid-template-columns: 1.15fr .9fr .95fr; align-items: start; }
.scene { padding: 20px; }
.scene:nth-child(2) { margin-top: 34px; }
.scene:nth-child(3) { margin-top: 14px; }
.masonry { columns: 3; column-gap: 22px; }
.case-card { break-inside: avoid; margin-bottom: 22px; padding: 18px; display: block; }
.case-card h3 { margin: 10px 0 0; }
.meta { display: block; margin-top: 8px; color: var(--c-muted); font-size: 13px; }
.news-layout { grid-template-columns: 1.35fr .8fr; align-items: start; }
.news-item a {
  display: block;
  border-left: 3px solid var(--c-primary);
  padding: 12px 8px 12px 14px;
  border-bottom: 1px solid var(--c-line);
}
.news-item a:hover { background: rgba(255, 255, 255, .65); }
.news-item strong { display: block; margin-top: 6px; }
.news-item .desc { display: block; color: var(--c-muted); }
.feature { padding: 16px; }
.feature h3 { margin-top: 12px; }
.more-row { margin-top: 18px; }
.rail {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 8px;
}
.pick { flex: 0 0 250px; scroll-snap-align: start; padding: 16px; }
.pick h3 { margin-top: 10px; }
.compare-grid { grid-template-columns: 1fr 1fr; }
.col-card { padding: 22px; }
.col-card h3 { color: var(--c-primary); }
.brand-row { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.brand-row li { padding: 16px 12px; }
.brand-row strong { display: block; font-size: 16px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { padding: 0 18px; }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-weight: 700;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--c-primary); font-size: 20px; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { color: var(--c-muted); padding: 0 0 16px; }
.promise { padding: 36px 0; }
.promise-row { grid-template-columns: repeat(3, 1fr); }
.promise-item { display: flex; gap: 12px; align-items: flex-start; }
.icon { width: 28px; height: 28px; color: var(--c-primary); flex: 0 0 auto; }
.promise-item p { color: var(--c-text); font-weight: 700; }
.contact-box { grid-template-columns: .85fr 1.15fr; padding: 28px; align-items: start; }
.form { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.field input, .field textarea {
  width: 100%;
  border: 1px solid var(--c-line);
  background: var(--c-bg);
  border-radius: var(--radius);
  padding: 12px 14px;
  outline: none;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus { box-shadow: 0 0 0 2px var(--c-primary); }
.field.is-error input, .field.is-error textarea { border-color: var(--c-danger); }
.err { color: var(--c-danger); font-size: 13px; margin: 0; }
.form-ok {
  margin-top: 12px;
  background: var(--c-alt);
  border-radius: var(--radius);
  padding: 12px 14px;
  color: var(--c-primary-dark);
}
::placeholder { color: var(--c-muted); opacity: 1; }
.site-footer { background: var(--c-footer); padding: 48px 0 28px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 24px; }
.foot-logo { font-size: 18px; font-weight: 700; }
.foot-grid p, .foot-grid a { color: var(--c-muted); font-size: 14px; }
.foot-grid h3 { font-size: 14px; margin-bottom: 10px; }
.foot-grid li + li { margin-top: 8px; }
.foot-grid a:hover { color: var(--c-primary); }
.copyline { margin-top: 22px; padding-top: 16px; border-top: 1px solid rgba(28, 40, 51, .08); color: var(--c-muted); font-size: 13px; }
.seg::-webkit-scrollbar, .rail::-webkit-scrollbar { height: 6px; }
.seg::-webkit-scrollbar-thumb, .rail::-webkit-scrollbar-thumb { background: rgba(28, 40, 51, .2); border-radius: 99px; }
@media (max-width: 1023px) {
  .hero-grid, .news-layout, .matrix, .contact-box { grid-template-columns: 1fr 1fr; }
  .matrix { grid-template-rows: auto; }
  .cell-lg { grid-row: auto; grid-column: 1 / -1; }
  .scenes { grid-template-columns: 1fr 1fr; }
  .scene:nth-child(2), .scene:nth-child(3) { margin-top: 0; }
  .scene:nth-child(3) { grid-column: 1 / -1; }
  .masonry { columns: 2; }
  .stats, .steps { grid-template-columns: repeat(2, 1fr); }
  .steps::before { display: none; }
  .brand-row { grid-template-columns: repeat(3, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  :root { --pad: 40px; }
  h1 { font-size: 28px; }
  h2 { font-size: 22px; }
  .header-top-inner { min-height: 64px; gap: 8px; }
  .logo { font-size: 14px; }
  .header-actions .btn { padding: 8px 10px; font-size: 13px; min-height: 38px; }
  .hero-grid, .entry-grid, .news-layout, .compare-grid, .contact-box, .matrix, .scenes, .promise-row, .stats {
    grid-template-columns: 1fr;
  }
  .stats { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
  .step { border-left: 1px solid rgba(28, 40, 51, .16); margin-left: 17px; padding: 0 0 16px 16px; }
  .step-no { margin-left: -34px; }
  .masonry { columns: 1; }
  .hero-actions { flex-wrap: wrap; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .container { width: min(var(--container), calc(100% - 32px)); }
  .logo { font-size: 13px; }
  .stat-num, .sync-count strong { font-size: 32px; }
  .brand-row, .foot-grid, .hero-actions { grid-template-columns: 1fr; }
  .hero-actions .btn, .header-actions .btn { width: auto; }
  .panel, .contact-box, .cell, .entry-card { padding: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}

/* roulang page: category1 */
:root {
  --c-primary: #2E6F9E;
  --c-primary-dark: #245a80;
  --c-accent: #4E4A78;
  --c-bg: #F3F6FA;
  --c-alt: #E7EEF6;
  --c-text: #1C2833;
  --c-muted: #5C6B7A;
  --c-line: rgba(28, 40, 51, .08);
  --c-card: #ffffff;
  --c-footer: #D5DEE8;
  --c-danger: #8E2F3A;
  --radius: 12px;
  --radius-btn: 10px;
  --shadow: 0 8px 24px rgba(28, 40, 51, .08);
  --container: 1120px;
  --pad: 72px;
}
/* roulang page: category1 */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
img, svg { display: block; max-width: 100%; }
p { margin: 0; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.35; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: #fff;
  border-bottom: 1px solid var(--c-line);
}
.header-top-inner, .header-actions {
  display: flex;
  align-items: center;
}
.header-top-inner { justify-content: space-between; gap: 16px; min-height: 72px; }
.logo { font-size: 18px; font-weight: 700; letter-spacing: 0; white-space: nowrap; color: var(--c-text); }
.header-actions { gap: 10px; flex-shrink: 0; }
.header-tabs { padding: 0 0 12px; }
.seg {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  flex-wrap: nowrap;
  scrollbar-width: thin;
}
.chip {
  flex: 0 0 auto;
  border: 1px solid var(--c-line);
  background: #fff;
  color: var(--c-text);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 14px;
  line-height: 1.4;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}
.chip:hover { background: var(--c-alt); }
.chip:active { transform: translateY(1px); }
.chip.is-on, .chip[aria-current="page"] {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  background: #fff;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}
.btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-primary:active, .btn-ghost:active { transform: translateY(0); }
.btn-ghost { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
.btn-ghost:hover { background: var(--c-alt); }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}
.section { padding: var(--pad) 0; }
.section-white { background: #fff; }
.section-alt { background: var(--c-alt); }
.section-head { margin-bottom: 28px; text-align: left; max-width: 760px; }
.lead { margin-top: 14px; color: var(--c-muted); font-size: 16px; line-height: 1.75; }
h1 { font-size: 28px; }
h2 { font-size: 22px; }
h3 { font-size: 18px; }
.crumbs { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; color: var(--c-muted); font-size: 13px; }
.crumbs a { color: var(--c-primary); font-weight: 700; }
.crumbs a:hover { text-decoration: underline; }
.crumbs span[aria-hidden="true"] { color: var(--c-muted); }
.filter-row { display: flex; flex-wrap: wrap; gap: 10px; }
.stack { display: flex; flex-direction: column; gap: 20px; }
.wide-card, .step, .pick, .band, .faq-item {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.wide-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  padding: 22px;
  border-left: 3px solid var(--c-primary);
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.wide-card:hover { transform: translateY(-1px); }
.num { font-size: 28px; line-height: 1.2; color: var(--c-primary); font-weight: 700; }
.wide-card p, .step p, .pick p, .band p { margin-top: 8px; color: var(--c-muted); }
.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--c-accent);
  color: var(--c-accent);
  border-radius: 999px;
  padding: 1px 8px;
  font-size: 12px;
  line-height: 1.6;
  background: #fff;
}
.badge-solid { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }
.badge-blue { border-color: var(--c-primary); color: var(--c-primary); }
.card-title { margin-top: 8px; }
.text-link { color: var(--c-primary); font-size: 14px; font-weight: 700; display: inline-flex; margin-top: 12px; }
.text-link:hover { text-decoration: underline; }
.meta { display: block; margin-top: 8px; color: var(--c-muted); font-size: 13px; }
.band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px;
}
.band h2 { margin-bottom: 0; }
.method-wrap { position: relative; }
.method-wrap::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  top: 36px;
  height: 1px;
  background: rgba(46, 111, 158, .45);
}
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; position: relative; }
.step { padding: 22px 18px; }
.step-no {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--c-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  position: relative;
  z-index: 1;
}
.step h3 { margin-top: 14px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { padding: 0 18px; }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-weight: 700;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--c-primary); font-size: 20px; line-height: 1; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { color: var(--c-muted); padding: 0 0 16px; }
.hscroll {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 8px;
}
.pick {
  flex: 0 0 260px;
  scroll-snap-align: start;
  padding: 16px;
  display: flex;
  flex-direction: column;
  transition: transform 180ms ease;
}
.pick:hover { transform: translateY(-1px); }
.pick h3 { margin-top: 12px; }
.swatch {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  display: flex;
  align-items: flex-end;
  padding: 12px;
  color: #fff;
  font-weight: 700;
  letter-spacing: 0;
}
.tone-a { background: #2E6F9E; }
.tone-b { background: #4E4A78; }
.tone-c { background: #3D7CA6; }
.tone-d { background: #5C6B8A; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field span { font-size: 14px; font-weight: 700; }
.field input, .field textarea {
  width: 100%;
  border: 1px solid var(--c-line);
  background: var(--c-bg);
  border-radius: var(--radius);
  padding: 12px 14px;
  outline: none;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 2px rgba(46, 111, 158, .25);
  background: #fff;
}
.field .err { color: var(--c-danger); font-size: 13px; }
.site-footer { background: var(--c-footer); padding: 48px 0 28px; color: var(--c-text); }
.foot-grid { display: grid; grid-template-columns: 1.4fr .8fr .8fr .8fr; gap: 24px; }
.foot-logo { font-weight: 700; font-size: 18px; margin: 0 0 8px; }
.site-footer h3 { font-size: 16px; margin: 0 0 10px; }
.site-footer li { margin: 6px 0; }
.site-footer a { color: var(--c-text); }
.site-footer a:hover { color: var(--c-primary); }
.site-footer p { color: var(--c-text); }
.foot-grid > div > p { color: var(--c-muted); font-size: 14px; }
.copyline {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid rgba(28, 40, 51, .12);
  color: var(--c-muted);
  font-size: 13px;
}
@media (max-width: 1023px) {
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
  .method-wrap::before { display: none; }
  .step { border-left: 3px solid var(--c-primary); }
}
@media (min-width: 1024px) {
  h1 { font-size: 40px; }
  h2 { font-size: 28px; }
}
@media (max-width: 767px) {
  :root { --pad: 40px; }
  h1 { font-size: 28px; }
  h2 { font-size: 22px; }
  .header-top-inner { min-height: 64px; }
  .logo { font-size: 15px; }
  .btn { padding: 8px 10px; min-height: 38px; }
  .wide-card { grid-template-columns: 48px 1fr; padding: 16px; }
  .band { flex-direction: column; align-items: flex-start; }
  .foot-grid { grid-template-columns: 1fr; }
  .pick { flex-basis: 78%; }
}
@media (max-width: 520px) {
  .header-actions { gap: 6px; }
  .btn { font-size: 13px; padding: 8px 8px; }
  .logo { font-size: 14px; }
  .wide-card { grid-template-columns: 1fr; }
  .num { font-size: 22px; }
}

/* roulang page: category2 */
:root {
 --c-primary: #2E6F9E;
 --c-primary-dark: #245a80;
 --c-accent: #4E4A78;
 --c-bg: #F3F6FA;
 --c-alt: #E7EEF6;
 --c-text: #1C2833;
 --c-muted: #5C6B7A;
 --c-line: rgba(28, 40, 51, .08);
 --c-card: #ffffff;
 --c-footer: #D5DEE8;
 --c-danger: #8E2F3A;
 --radius: 12px;
 --radius-btn: 10px;
 --shadow: 0 8px 24px rgba(28, 40, 51, .08);
 --container: 1120px;
 --pad: 72px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
 margin: 0;
 font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
 font-size: 16px;
 line-height: 1.75;
 color: var(--c-text);
 background: var(--c-bg);
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }
h1 { font-size: 40px; line-height: 1.25; font-weight: 700; }
h2 { font-size: 26px; line-height: 1.35; font-weight: 700; }
h3 { font-size: 18px; line-height: 1.45; font-weight: 700; }
.container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
.site-header {
 position: sticky;
 top: 0;
 z-index: 30;
 background: #fff;
 border-bottom: 1px solid var(--c-line);
}
.header-top-inner, .header-actions {
 display: flex;
 align-items: center;
}
.header-top-inner { justify-content: space-between; gap: 16px; min-height: 72px; }
.logo { font-size: 18px; font-weight: 700; letter-spacing: 0; white-space: nowrap; color: var(--c-text); }
.header-actions { gap: 10px; flex-shrink: 0; }
.header-tabs { padding: 0 0 12px; }
.seg {
 display: flex;
 gap: 8px;
 overflow-x: auto;
 -webkit-overflow-scrolling: touch;
 scrollbar-width: none;
}
.seg::-webkit-scrollbar { display: none; }
.chip {
 flex: 0 0 auto;
 border: 1px solid var(--c-line);
 background: #fff;
 color: var(--c-text);
 border-radius: 999px;
 padding: 8px 16px;
 font-size: 14px;
 transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}
.chip:hover { background: var(--c-alt); }
.chip.is-on, .chip[aria-current="page"] {
 background: var(--c-primary);
 border-color: var(--c-primary);
 color: #fff;
}
.btn {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 min-height: 42px;
 padding: 8px 16px;
 border-radius: var(--radius-btn);
 border: 1px solid transparent;
 cursor: pointer;
 font-size: 14px;
 font-weight: 600;
 transition: background 180ms ease, color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-1px); }
.btn-primary:active, .btn-ghost:active { transform: translateY(0); }
.btn-ghost { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
.btn-ghost:hover { background: var(--c-alt); }
a:focus-visible, button:focus-visible, summary:focus-visible, .chip:focus-visible, .btn:focus-visible {
 outline: 2px solid var(--c-primary);
 outline-offset: 2px;
}
.section { padding: var(--pad) 0; }
.section-alt { background: var(--c-alt); }
.section-thin { padding: 36px 0; }
.section-head { margin-bottom: 28px; text-align: left; }
.section-head p, .lead { margin-top: 12px; color: var(--c-muted); max-width: 760px; }
.kicker {
 color: var(--c-accent);
 font-size: 13px;
 font-weight: 700;
 letter-spacing: .12em;
 margin-bottom: 12px;
}
.page-head { padding-top: 48px; padding-bottom: 28px; }
.page-head .lead { margin-top: 16px; color: var(--c-text); }
.card, .col-card, .faq-item, .cluster, .metric-bar, .more-card, .cta-line {
 background: var(--c-card);
 border: 1px solid var(--c-line);
 border-radius: var(--radius);
 box-shadow: var(--shadow);
}
.mag {
 display: grid;
 grid-template-columns: 1.45fr 1fr 1fr;
 gap: 22px;
 align-items: stretch;
}
.wide { grid-column: 1; grid-row: 1 / span 2; }
.card {
 display: flex;
 flex-direction: column;
 gap: 12px;
 padding: 18px;
 min-width: 0;
 transition: transform 180ms ease, box-shadow 180ms ease;
}
.card:hover { transform: translateY(-1px); }
.wide-inner {
 display: grid;
 grid-template-columns: 1.15fr .9fr;
 gap: 18px;
 height: 100%;
}
.card p, .col-card p, .cluster p, .more-card p, .cta-line p {
 color: var(--c-muted);
 font-size: 16px;
}
.badge {
 display: inline-flex;
 align-items: center;
 border: 1px solid var(--c-accent);
 color: var(--c-accent);
 border-radius: 999px;
 padding: 1px 8px;
 font-size: 12px;
 line-height: 1.6;
 background: #fff;
 width: fit-content;
}
.badge-solid { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }
.badge-blue { border-color: var(--c-primary); color: var(--c-primary); }
.ph {
 width: 100%;
 aspect-ratio: 16 / 9;
 border-radius: var(--radius);
 display: flex;
 align-items: flex-end;
 padding: 14px;
 color: #fff;
 font-size: 14px;
 font-weight: 700;
 background: #2E6F9E;
}
.ph-b { background: #4E4A78; }
.ph-c { background: #3d7ea8; }
.ph-d { background: #5d6e8c; }
.ph-e { background: #3f6784; }
.wide .ph { aspect-ratio: 4 / 3; height: 100%; min-height: 220px; }
.meta { display: block; color: var(--c-muted); font-size: 13px; }
.text-link { color: var(--c-primary); font-size: 14px; font-weight: 700; margin-top: auto; }
.text-link:hover { text-decoration: underline; }
.cluster-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.cluster { padding: 22px; }
.cluster h2 { font-size: 22px; }
.cluster-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 16px; }
.cluster-cols article {
 border-left: 3px solid var(--c-accent);
 padding-left: 12px;
}
.cluster-cols h3 { margin-bottom: 8px; }
.metric-bar {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 overflow: hidden;
}
.metric-bar article { padding: 28px 22px; }
.metric-bar article + article { border-left: 1px solid var(--c-line); }
.metric-bar strong {
 display: block;
 font-size: 40px;
 line-height: 1.1;
 color: var(--c-primary);
 font-weight: 700;
}
.metric-bar span { display: block; margin-top: 8px; color: var(--c-muted); font-size: 14px; }
.more-card, .cta-line {
 display: flex;
 justify-content: space-between;
 align-items: center;
 gap: 18px;
 padding: 22px;
}
.more-card h2, .cta-line h2 { font-size: 22px; }
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.col-card { padding: 22px; display: flex; flex-direction: column; gap: 12px; }
.col-card h3 { color: var(--c-primary); }
.col-card ul { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
.col-card li {
 border-left: 3px solid var(--c-primary);
 padding: 4px 0 4px 12px;
 color: var(--c-text);
}
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { padding: 0 18px; }
.faq-item summary {
 list-style: none;
 cursor: pointer;
 min-height: 56px;
 display: flex;
 align-items: center;
 justify-content: space-between;
 gap: 12px;
 font-weight: 700;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--c-primary); font-size: 20px; flex: 0 0 auto; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { color: var(--c-muted); padding: 0 0 16px; }
.site-footer { background: var(--c-footer); padding: 48px 0 28px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr .8fr .8fr .8fr; gap: 24px; }
.foot-logo { font-size: 18px; font-weight: 700; color: var(--c-text); margin-bottom: 8px; }
.site-footer h3 { font-size: 16px; margin-bottom: 10px; }
.site-footer p, .site-footer li { color: var(--c-muted); font-size: 14px; }
.site-footer li { margin-top: 8px; }
.site-footer a { color: var(--c-text); }
.site-footer a:hover { color: var(--c-primary); }
.copyline {
 margin-top: 22px;
 padding-top: 16px;
 border-top: 1px solid rgba(28, 40, 51, .12);
 color: var(--c-muted);
 font-size: 14px;
}
@media (max-width: 1023px) {
 .mag { grid-template-columns: 1fr 1fr; }
 .wide { grid-column: 1 / -1; grid-row: auto; }
 .wide-inner { grid-template-columns: 1fr 1fr; }
 .cluster-wrap { grid-template-columns: 1fr; }
 .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
 :root { --pad: 40px; }
 h1 { font-size: 28px; }
 h2, .cluster h2, .more-card h2, .cta-line h2 { font-size: 22px; }
 .page-head { padding-top: 32px; }
 .wide-inner, .cluster-cols, .metric-bar, .compare-grid, .foot-grid { grid-template-columns: 1fr; }
 .metric-bar article + article { border-left: 0; border-top: 1px solid var(--c-line); }
 .wide .ph { aspect-ratio: 16 / 9; min-height: 0; height: auto; }
 .more-card, .cta-line { flex-direction: column; align-items: flex-start; }
 .header-top-inner { min-height: 64px; }
}
@media (max-width: 520px) {
 .logo { white-space: normal; font-size: 14px; line-height: 1.35; max-width: 46%; }
 .header-actions { gap: 6px; }
 .btn { padding: 8px 10px; font-size: 13px; min-height: 38px; }
 .metric-bar strong { font-size: 32px; }
 .container { width: min(var(--container), calc(100% - 32px)); }
}