/* roulang page: index */
:root {
  --c-primary: #136B93;
  --c-primary-hover: #0F5778;
  --c-primary-dark: #0B4661;
  --c-primary-bg: #E8F2F7;
  --c-accent: #EFA94D;
  --c-bg: #F5F8FA;
  --c-surface: #FFFFFF;
  --c-text: #1E2A36;
  --c-muted: #5B6E7C;
  --c-faint: #8A9AA6;
  --c-line: #E3EBF0;
  --c-card-border: rgba(19, 107, 147, 0.10);
  --c-tag-bg: #EEF4F8;
  --c-tag-text: #46677A;
  --c-danger: #D64A45;
  --c-success: #2E8B68;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 2px 4px rgba(19, 107, 147, 0.04), 0 14px 30px -12px rgba(19, 107, 147, 0.10);
  --shadow-card-hover: 0 4px 8px rgba(19, 107, 147, 0.06), 0 22px 36px -14px rgba(19, 107, 147, 0.16);
  --space-section: clamp(72px, 8vw, 104px);
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--c-primary);
  text-decoration: none;
}

a:hover {
  color: var(--c-primary-hover);
}

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

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
}

ul, ol {
  margin: 0;
  padding: 0;
}

p, h1, h2, h3, h4, h5 {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.1rem, 3.2vw, 3rem);
  line-height: 1.24;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  font-weight: 700;
}

h2 {
  font-size: clamp(1.5rem, 2vw, 2rem);
  line-height: 1.3;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
  font-weight: 700;
}

h3 {
  font-size: 1.25rem;
  line-height: 1.45;
  margin-bottom: 8px;
  font-weight: 650;
}

h4 {
  font-size: 1.05rem;
  font-weight: 650;
}

:focus-visible {
  outline: 3px solid rgba(19, 107, 147, 0.45);
  outline-offset: 2px;
  border-radius: 6px;
}

.skip-link {
  position: fixed;
  left: -999px;
  top: 12px;
  z-index: 2000;
  background: var(--c-primary);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
}

.skip-link:focus {
  left: 12px;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
}

/* 左侧竖向导航 */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 272px;
  background: var(--c-surface);
  border-right: 1px solid var(--c-line);
  display: flex;
  flex-direction: column;
  z-index: 200;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 28px 22px 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--c-text);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  border-radius: 12px;
  padding: 8px 8px 14px;
}

.brand i {
  color: var(--c-accent);
}

.brand-text {
  font-size: 20px;
  color: var(--c-text);
  letter-spacing: -0.02em;
}

.side-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.side-nav .nav-label {
  font-size: 12px;
  color: var(--c-faint);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 8px 8px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  border-radius: 12px;
  color: var(--c-muted);
  font-size: 15px;
  font-weight: 500;
  min-height: 46px;
  position: relative;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-link i {
  width: 20px;
  text-align: center;
  font-size: 16px;
  color: var(--c-faint);
  transition: color 0.2s ease;
}

.nav-link:hover {
  background: #F3F8FB;
  color: var(--c-primary);
  transform: translateX(2px);
}

.nav-link.active {
  background: var(--c-primary-bg);
  color: var(--c-primary);
  font-weight: 700;
}

.nav-link.active i {
  color: var(--c-primary);
}

.nav-link.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 0 4px 4px 0;
  background: var(--c-primary);
}

.side-note {
  margin-top: auto;
  background: #F7FAFC;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: 18px;
}

.side-note i {
  color: var(--c-accent);
  font-size: 20px;
  margin-bottom: 10px;
}

.side-note strong {
  display: block;
  color: var(--c-text);
  font-size: 15px;
  margin-bottom: 4px;
}

.side-note span {
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.6;
}

/* 移动端顶栏与抽屉 */
.mobile-topbar {
  position: sticky;
  top: 0;
  z-index: 190;
  display: none;
  height: 64px;
  align-items: center;
  justify-content: space-between;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
  padding: 0 16px;
  box-shadow: 0 1px 8px rgba(19, 107, 147, 0.05);
}

.mobile-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--c-text);
  font-weight: 700;
  font-size: 19px;
}

.mobile-brand i {
  color: var(--c-accent);
  font-size: 19px;
}

.hamburger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: var(--c-text);
  font-size: 20px;
  border-radius: 10px;
}

.hamburger:hover {
  background: var(--c-primary-bg);
  color: var(--c-primary);
}

.drawer-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 30, 42, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  z-index: 300;
}

.drawer-mask.is-visible {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: 306px;
  background: var(--c-surface);
  z-index: 310;
  padding: 28px 22px;
  transform: translateX(-104%);
  transition: transform 0.28s ease;
  overflow-y: auto;
  box-shadow: 8px 0 30px rgba(19, 107, 147, 0.12);
}

.mobile-drawer.is-open {
  transform: translateX(0);
}

.mobile-drawer .drawer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--c-text);
  font-size: 22px;
  font-weight: 700;
  padding: 6px 6px 22px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 18px;
}

.drawer-brand i {
  color: var(--c-accent);
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.drawer-nav a {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--c-muted);
  padding: 13px 16px;
  border-radius: 12px;
  font-weight: 600;
  min-height: 48px;
}

.drawer-nav a i {
  color: var(--c-faint);
  width: 20px;
  text-align: center;
}

.drawer-nav a:hover,
.drawer-nav a.is-active {
  background: var(--c-primary-bg);
  color: var(--c-primary);
}

.drawer-nav a.is-active i {
  color: var(--c-primary);
}

/* 主内容区 */
.site-shell {
  margin-left: 272px;
  min-height: 100vh;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  font-weight: 650;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
}

.btn i {
  font-size: 15px;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 6px 14px -6px rgba(19, 107, 147, 0.4);
}

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

.btn-primary:active {
  background: var(--c-primary-dark);
}

.btn-secondary {
  background: var(--c-surface);
  color: var(--c-primary);
  border-color: #CFE0E8;
}

.btn-secondary:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: #F5FBFE;
}

.btn-secondary:active {
  background: var(--c-primary-bg);
}

.btn-accent {
  background: rgba(239, 169, 77, 0.14);
  border-color: rgba(239, 169, 77, 0.34);
  color: #A56820;
}

.btn-accent:hover {
  background: rgba(239, 169, 77, 0.24);
  color: #85500F;
}

.btn-accent.is-bookmarked {
  background: #F5E4CD;
  border-color: #E4B878;
  color: #85500F;
}

.btn-lg {
  min-height: 52px;
  padding: 0 30px;
  font-size: 16px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--c-tag-bg);
  color: var(--c-tag-text);
  border-radius: var(--radius-pill);
  padding: 5px 13px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
}

.chip.primary {
  background: var(--c-primary-bg);
  color: var(--c-primary);
}

.chip.warn {
  background: #FFF4E2;
  color: #A56820;
}

/* Hero 首屏 */
.hero-section {
  position: relative;
  min-height: 520px;
  min-height: calc(72vh);
  display: flex;
  align-items: center;
  background-image: url("/assets/images/backpic/back-1.webp");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: clamp(64px, 8vw, 116px) 0;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.82) 34%, rgba(255, 255, 255, 0.28) 100%);
}

.hero-section::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -180px;
  width: 460px;
  height: 300px;
  border: 2px solid rgba(19, 107, 147, 0.16);
  border-radius: 60% 40% 70% 30% / 50% 60% 40% 50%;
  transform: rotate(16deg);
  pointer-events: none;
}

.hero-inner {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.hero-title {
  margin-bottom: 22px;
}

.hero-lead {
  font-size: clamp(1.05rem, 1.4vw, 1.2rem);
  line-height: 1.8;
  color: var(--c-muted);
  max-width: 640px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  color: var(--c-muted);
  font-size: 14px;
  padding-bottom: 4px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-meta i {
  color: var(--c-primary);
  font-size: 16px;
}

/* 板块通用 */
.section {
  padding: var(--space-section) 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: clamp(36px, 5vw, 56px);
}

.section-head .kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-head .kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--c-accent);
  border-radius: 2px;
}

.section-head .lead {
  color: var(--c-muted);
  font-size: 16px;
  margin: 0;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head.center .kicker {
  justify-content: center;
}

/* 合集目录区 */
.dir-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dir-row {
  display: flex;
  align-items: center;
  background: var(--c-surface);
  border: 1px solid var(--c-card-border);
  border-left: 3px solid transparent;
  border-radius: var(--radius-md);
  padding: 20px 22px;
  gap: 20px;
  box-shadow: var(--shadow-card);
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
  min-height: 108px;
  text-decoration: none;
  color: var(--c-text);
}

.dir-row:hover {
  background: #EEF4F8;
  border-left-color: var(--c-primary);
  box-shadow: var(--shadow-card-hover);
  transform: translateX(4px);
}

.dir-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--c-primary);
  opacity: 0.55;
  min-width: 52px;
  font-variant-numeric: tabular-nums;
}

.dir-body {
  flex: 1;
  min-width: 240px;
}

.dir-title {
  font-weight: 700;
  font-size: 1.09rem;
  color: var(--c-text);
  display: block;
  margin-bottom: 4px;
}

.dir-desc {
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.6;
  display: block;
}

.dir-meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-faint);
  font-size: 13px;
  margin-top: 6px;
}

.dir-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--c-primary);
  font-weight: 650;
  font-size: 14px;
  white-space: nowrap;
}

.dir-action i {
  transition: transform 0.2s ease;
}

.dir-row:hover .dir-action i {
  transform: translateX(4px);
}

/* 精选内容大横卡 */
.pick-main {
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-card-border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  transition: box-shadow 0.2s ease;
}

.pick-main:hover {
  box-shadow: var(--shadow-card-hover);
}

.pick-cover {
  position: relative;
  overflow: hidden;
  min-height: 300px;
}

.pick-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  transform: scale(1);
  transition: transform 0.45s ease;
}

.pick-main:hover .pick-cover img,
.digest-card:hover .digest-cover img {
  transform: scale(1.045);
}

.pick-content {
  display: flex;
  flex-direction: column;
  padding: 34px 34px 30px;
  justify-content: center;
}

.pick-content h3 {
  font-size: 1.45rem;
  line-height: 1.4;
  color: var(--c-text);
}

.pick-content p {
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.75;
  margin: 12px 0 20px;
}

.pick-footer {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: auto;
  flex-wrap: wrap;
}

.pick-footer .read-meta {
  color: var(--c-faint);
  font-size: 13px;
}

.pick-footer .small-link {
  color: var(--c-primary);
  font-weight: 650;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pick-footer .small-link i {
  transition: transform 0.2s ease;
}

.pick-footer .small-link:hover i {
  transform: translateX(4px);
}

/* 小块精选列表 */
.digest-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.digest-card {
  display: flex;
  align-items: stretch;
  background: var(--c-surface);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  color: var(--c-text);
  min-height: 138px;
}

.digest-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.digest-cover {
  width: 216px;
  min-width: 216px;
  overflow: hidden;
  position: relative;
}

.digest-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  transition: transform 0.4s ease;
}

.digest-body {
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.digest-body h3 {
  font-size: 1.06rem;
  line-height: 1.4;
  margin-bottom: 6px;
}

.digest-body p {
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.6;
  margin: 0 0 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.digest-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--c-faint);
  font-size: 12px;
}

/* 最新信息动态 */
.latest-area {
  position: relative;
}

.latest-area::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(19, 107, 147, 0.026), rgba(19, 107, 147, 0.045));
  pointer-events: none;
}

.latest-panel {
  background: var(--c-surface);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.latest-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  border-bottom: 1px solid var(--c-line);
  flex-wrap: wrap;
}

.latest-panel-header .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-primary);
  display: inline-block;
}

.latest-row {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 26px;
  border-top: 1px solid #EEF2F5;
  transition: background 0.2s ease;
  text-decoration: none;
  color: var(--c-text);
}

.latest-row:first-of-type {
  border-top: 0;
}

.latest-row:hover {
  background: #F5FAFC;
}

.latest-time {
  min-width: 88px;
  color: var(--c-faint);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.latest-main {
  flex: 1;
  min-width: 260px;
}

.latest-title {
  font-weight: 700;
  font-size: 1.04rem;
  color: var(--c-text);
  transition: color 0.2s ease;
}

.latest-row:hover .latest-title {
  color: var(--c-primary);
}

.latest-summary {
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.6;
  margin: 4px 0 0;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.latest-tag-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.latest-arrow {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
  background: var(--c-primary-bg);
  border-radius: 50%;
  transition: transform 0.2s ease;
}

.latest-row:hover .latest-arrow {
  transform: translateX(4px);
}

.empty-inline {
  padding: 64px 20px;
  text-align: center;
  color: var(--c-faint);
  border: 1px dashed #D2E2E9;
  border-radius: var(--radius-md);
}

.empty-inline i {
  font-size: 40px;
  margin-bottom: 14px;
  color: #B7CDD9;
}

.empty-inline p {
  margin: 0;
  font-size: 15px;
}

/* 榜单 */
.rank-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.rank-panel {
  background: var(--c-surface);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 24px;
}

.rank-panel-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--c-line);
}

.rank-panel-heading .rank-icon {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--c-primary-bg);
  color: var(--c-primary);
  border-radius: 12px;
  font-size: 17px;
}

.rank-panel-heading h3 {
  margin: 0;
  font-size: 19px;
}

.rank-list {
  list-style: none;
}

.rank-list li {
  border-bottom: 1px solid #EEF2F5;
}

.rank-list li:last-child {
  border-bottom: 0;
}

.rank-list a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 6px;
  text-decoration: none;
  color: var(--c-text);
  font-size: 15px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.rank-list a:hover {
  color: var(--c-primary);
  transform: translateX(4px);
}

.rank-number {
  font-weight: 900;
  color: var(--c-primary);
  min-width: 30px;
  font-size: 17px;
  opacity: 0.7;
}

.rank-list li:nth-child(2) .rank-number {
  color: var(--c-accent);
  opacity: 1;
}

.rank-list li:nth-child(1) .rank-number {
  color: var(--c-accent);
  opacity: 1;
}

.rank-tag {
  margin-left: auto;
}

/* 内容方法论 */
.reason-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(36px, 6vw, 72px);
  align-items: center;
}

.reason-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card-hover);
  position: relative;
}

.reason-media img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.reason-points {
  display: flex;
  flex-direction: column;
  gap: 34px;
}

.reason-point {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.reason-icon {
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--c-primary-bg);
  color: var(--c-primary);
  font-size: 20px;
}

.reason-point h3 {
  margin-bottom: 4px;
}

.reason-point p {
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
}

/* FAQ */
.faq-wrap {
  max-width: 880px;
  margin: 0 auto;
}

.faq-item {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(19, 107, 147, 0.03);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: 16px;
  font-weight: 650;
  color: var(--c-text);
  transition: color 0.2s ease;
  text-decoration: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "\f067";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: var(--c-faint);
  font-size: 14px;
  transition: transform 0.25s ease, color 0.25s ease;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--c-primary);
}

.faq-item[open] summary {
  color: var(--c-primary);
}

.faq-body {
  padding: 0 24px 22px;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.75;
  border-top: 1px solid #F0F4F6;
  margin-top: 16px;
  padding-top: 16px;
}

.faq-body p {
  margin: 0;
}

/* CTA */
.cta-section {
  padding-bottom: clamp(80px, 9vw, 120px);
}

.cta-card {
  background: var(--c-primary-bg);
  border: 1px solid rgba(19, 107, 147, 0.14);
  border-radius: 28px;
  padding: clamp(36px, 6vw, 64px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -80px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 2px solid rgba(19, 107, 147, 0.14);
  pointer-events: none;
}

.cta-card::after {
  content: "\f070";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  right: 28px;
  bottom: 4px;
  font-size: 120px;
  color: rgba(19, 107, 147, 0.05);
  pointer-events: none;
}

.cta-copy {
  max-width: 600px;
  position: relative;
  z-index: 1;
}

.cta-copy h2 {
  font-size: clamp(1.7rem, 2.4vw, 2.4rem);
}

.cta-copy p {
  color: var(--c-muted);
  margin: 0;
  font-size: 16px;
}

.cta-buttons {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* 页脚 */
.site-footer {
  background: #0B4661;
  color: #D7E6ED;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 32px 38px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.9fr;
  gap: clamp(32px, 5vw, 72px);
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand-card .brand {
  padding-left: 0;
  color: #fff;
}

.footer-brand-card .brand .brand-text {
  color: #fff;
}

.footer-desc {
  color: #B9CED9;
  font-size: 14px;
  line-height: 1.8;
  max-width: 360px;
}

.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #C5D8E1;
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a i {
  font-size: 12px;
  color: #7FA8BB;
}

.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 28px;
  color: #9EBCCB;
  font-size: 13px;
}

.footer-bottom a {
  color: #C5D8E1;
}

/* 移动版适配 */
@media (max-width: 1199px) {
  .container,
  .hero-inner,
  .footer-inner {
    padding-left: 24px;
    padding-right: 24px;
  }
  .digest-card {
    min-height: 160px;
  }
}

@media (max-width: 991px) {
  .sidebar {
    display: none;
  }

  .mobile-topbar {
    display: flex;
  }

  .site-shell {
    margin-left: 0;
  }

  .pick-main {
    grid-template-columns: 1fr;
  }

  .pick-cover {
    min-height: 260px;
    position: relative;
  }

  .digest-list {
    grid-template-columns: 1fr;
  }

  .reason-layout {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    padding-top: 48px;
  }
}

@media (max-width: 767px) {
  .section {
    padding: 64px 0;
  }

  .container,
  .hero-inner,
  .footer-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-section {
    min-height: 520px;
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .hero-section::before {
    background: linear-gradient(0deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.8));
  }

  .hero-meta {
    gap: 12px;
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .section-head .lead {
    font-size: 15px;
  }

  .dir-row {
    align-items: flex-start;
    flex-wrap: wrap;
    padding: 20px 16px;
    gap: 12px;
  }

  .dir-num {
    min-width: 38px;
    font-size: 1.2rem;
  }

  .dir-action {
    width: 100%;
    margin-left: 50px;
  }

  .dir-body {
    min-width: calc(100% - 48px);
  }

  .pick-content {
    padding: 24px 22px;
  }

  .pick-cover {
    min-height: 190px;
  }

  .digest-card {
    min-height: auto;
  }

  .digest-cover {
    width: 130px;
    min-width: 130px;
  }

  .digest-body {
    padding: 14px 15px;
  }

  .digest-body h3 {
    font-size: 0.97rem;
  }

  .digest-body p {
    font-size: 13px;
    -webkit-line-clamp: 3;
  }

  .latest-row {
    flex-wrap: wrap;
    padding: 18px 16px;
    gap: 8px 16px;
  }

  .latest-time {
    flex: 0 0 84px;
  }

  .latest-main {
    min-width: 0;
    flex-basis: calc(100% - 104px);
  }

  .latest-summary {
    -webkit-line-clamp: 2;
  }

  .latest-tag-group {
    flex-basis: 100%;
    justify-content: flex-start;
    padding-left: 104px;
  }

  .rank-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .rank-panel {
    padding: 18px;
  }

  .rank-list a {
    flex-wrap: wrap;
  }

  .rank-tag {
    margin-left: 44px;
    width: calc(100% - 44px);
    white-space: normal;
  }

  .reason-media img {
    height: 240px;
  }

  .reason-point {
    gap: 14px;
  }

  .reason-icon {
    flex-basis: 42px;
    width: 42px;
    height: 42px;
    font-size: 17px;
  }

  .cta-card {
    padding: 28px 20px;
    border-radius: 20px;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  .footer-grid {
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.58rem;
  }

  .digest-cover {
    width: 106px;
    min-width: 106px;
  }

  .digest-body h3 {
    font-size: 0.93rem;
  }

  .digest-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .latest-panel-header {
    align-items: flex-start;
  }

  .latest-time {
    flex: 0 0 72px;
    font-size: 12px;
  }

  .latest-main {
    flex-basis: calc(100% - 92px);
  }

  .latest-tag-group {
    padding-left: 0;
  }

  .dir-action {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: article */
:root {
            --primary: #136B93;
            --primary-hover: #0F5778;
            --primary-dark: #0B4661;
            --primary-soft: #E8F2F7;
            --accent: #EFA94D;
            --accent-soft: #FFF3E0;
            --bg: #F5F8FA;
            --surface: #FFFFFF;
            --text: #1E2A36;
            --text-secondary: #5B6E7C;
            --text-light: #8A9AA6;
            --border: #E3EBF0;
            --border-input: #D6E1E8;
            --danger: #D64A45;
            --success: #2E8B68;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --radius-pill: 999px;
            --ease: 0.22s cubic-bezier(0.2, 0.6, 0.2, 1);
            --shadow-card: 0 2px 4px rgba(19, 107, 147, 0.04), 0 14px 30px -12px rgba(19, 107, 147, 0.10);
            --shadow-hover: 0 4px 8px rgba(19, 107, 147, 0.06), 0 22px 36px -14px rgba(19, 107, 147, 0.16);
            --side-width: 272px;
        }

        *,
        *:before,
        *:after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.75;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input,
        textarea {
            font: inherit;
            color: inherit;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        :focus-visible {
            outline: 3px solid rgba(19, 107, 147, 0.38);
            outline-offset: 2px;
            border-radius: 6px;
        }

        ::selection {
            background: rgba(19, 107, 147, 0.15);
        }

        .skip-link {
            position: fixed;
            left: 12px;
            top: -80px;
            z-index: 200;
            background: var(--primary);
            color: #fff;
            padding: 10px 18px;
            border-radius: 8px;
            transition: top .2s ease;
        }

        .skip-link:focus {
            top: 12px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: var(--text);
        }

        .brand i {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(145deg, #19A7C4, var(--primary));
            color: #fff;
            font-size: 18px;
            box-shadow: 0 10px 18px -8px rgba(19, 107, 147, 0.35);
        }

        .brand-text {
            font-size: 1.28rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--text);
        }

        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--side-width);
            display: flex;
            flex-direction: column;
            background: var(--surface);
            border-right: 1px solid var(--border);
            padding: 30px 20px 24px;
            z-index: 100;
        }

        .side-nav .brand {
            padding: 0 10px 28px;
        }

        .nav-caption {
            padding: 0 14px;
            font-size: 13px;
            color: var(--text-light);
            font-weight: 600;
            letter-spacing: 0.12em;
            margin-bottom: 12px;
        }

        .nav-links {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 14px;
            min-height: 48px;
            padding: 0 14px;
            border-radius: 10px;
            font-weight: 600;
            color: var(--text-secondary);
            border: 1px solid transparent;
            transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
        }

        .nav-link i {
            width: 22px;
            text-align: center;
            font-size: 16px;
        }

        .nav-link:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .nav-link.active {
            background: var(--primary-soft);
            color: var(--primary);
            font-weight: 700;
            border-left: 2px solid var(--primary);
        }

        .nav-side-note {
            margin-top: auto;
            background: #F8FBFC;
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 16px;
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .nav-side-note i {
            color: var(--primary);
            margin-right: 6px;
        }

        .site-header {
            display: none;
        }

        .main-area {
            margin-left: var(--side-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .page-body {
            flex: 1;
        }

        .article-page {
            max-width: 900px;
            margin: 0 auto;
            padding: 52px 40px 84px;
        }

        .crumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 22px;
        }

        .crumb a {
            color: var(--text-secondary);
            transition: color .2s ease;
        }

        .crumb a:hover {
            color: var(--primary);
        }

        .crumb i {
            font-size: 11px;
            color: #B8C5CE;
        }

        .crumb .current {
            color: var(--text-light);
            max-width: 360px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-header {
            margin-bottom: 28px;
        }

        .article-title {
            font-size: clamp(1.7rem, 2.5vw, 2.35rem);
            line-height: 1.45;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.01em;
            margin-bottom: 18px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 20px;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--primary);
            opacity: .70;
        }

        .article-meta .meta-dot {
            color: #BED0DC;
        }

        .article-sheet {
            background: var(--surface);
            border: 1px solid rgba(19, 107, 147, 0.08);
            box-shadow: var(--shadow-card);
            border-radius: var(--radius-lg);
            padding: clamp(26px, 4vw, 58px);
            margin-bottom: 22px;
        }

        .article-body {
            font-size: 16.5px;
            line-height: 1.9;
            color: #24313D;
            word-break: break-word;
        }

        .article-body p {
            margin: 0 0 1.2em;
        }

        .article-body h2 {
            font-size: 1.45rem;
            line-height: 1.5;
            color: var(--text);
            border-left: 4px solid var(--primary);
            padding-left: 14px;
            margin: 2em 0 0.9em;
        }

        .article-body h3 {
            font-size: 1.2rem;
            color: #16323F;
            margin: 1.8em 0 0.6em;
        }

        .article-body ul,
        .article-body ol {
            padding-left: 1.4em;
            margin: 0 0 1.4em;
        }

        .article-body ul {
            list-style: disc;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body li {
            margin-bottom: 0.55em;
        }

        .article-body blockquote {
            margin: 1.6em 0;
            padding: 18px 22px;
            background: #F2F8FB;
            border-left: 4px solid var(--primary);
            border-radius: 0 12px 12px 0;
            color: var(--text-secondary);
            font-size: 0.98em;
        }

        .article-body blockquote p {
            margin: 0;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 4px;
            transition: background .2s ease;
        }

        .article-body a:hover {
            background: rgba(19, 107, 147, 0.1);
        }

        .article-body img {
            border-radius: 14px;
            margin: 1.8em 0 0.8em;
        }

        .article-body figure {
            margin: 1.5em 0;
        }

        .article-body figcaption {
            font-size: 13px;
            color: var(--text-light);
            text-align: center;
            padding-top: 8px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 14px;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 0.95em;
            border: 1px solid var(--border);
            border-radius: 10px;
            overflow: hidden;
        }

        .article-body th,
        .article-body td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-body th {
            background: var(--primary-soft);
            color: var(--primary-dark);
            font-weight: 600;
        }

        .article-body pre {
            background: #0E3E57;
            color: #E9F4F8;
            padding: 20px;
            border-radius: 12px;
            overflow: auto;
            margin: 1.5em 0;
            font-size: 14px;
            line-height: 1.7;
        }

        .article-body code {
            background: #E6F0F5;
            color: #0B4F6B;
            padding: 3px 8px;
            border-radius: 6px;
            font-family: "SFMono-Regular", Consolas, monospace;
            font-size: 0.9em;
        }

        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .article-empty {
            padding: 46px 30px;
            width: 100%;
            text-align: center;
        }

        .article-empty i {
            font-size: 48px;
            color: #A9BDC9;
        }

        .article-empty p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin: 18px 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 0 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease);
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 10px 14px -8px rgba(19, 107, 147, 0.34);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            background: var(--primary-dark);
            box-shadow: none;
            transform: translateY(0);
        }

        .btn-outline {
            background: var(--surface);
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-soft);
            transform: translateY(-1px);
            box-shadow: 0 8px 16px -10px rgba(19, 107, 147, 0.22);
        }

        .btn-light-outline {
            background: transparent;
            border: 1px solid #A5BECE;
            color: #DCEFF6;
        }

        .btn-light-outline:hover {
            background: rgba(255, 255, 255, 0.09);
            border-color: #DFF1F6;
            transform: translateY(-1px);
        }

        .article-footer-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding: 20px 0 8px;
            margin-top: 10px;
            border-top: 1px solid var(--border);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: #EEF4F8;
            color: #46677A;
            border-radius: var(--radius-pill);
            padding: 5px 13px;
            font-size: 12px;
            font-weight: 600;
            transition: background .2s ease, color .2s ease;
        }

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

        .article-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            padding: 14px 0 0;
        }

        .action-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-height: 42px;
            border-radius: 10px;
            padding: 0 18px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            background: #F6FAFC;
            border: 1px solid var(--border);
            transition: all var(--ease);
        }

        .action-btn i {
            color: var(--primary);
        }

        .action-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
            transform: translateY(-1px);
        }

        .action-btn.active-bookmark i {
            color: var(--accent);
        }

        .pager-wrap {
            display: flex;
            gap: 14px;
            margin: 26px 0 10px;
        }

        .pager-btn {
            flex: 1;
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid rgba(19, 107, 147, 0.10);
            box-shadow: 0 2px 3px rgba(19, 107, 147, 0.02);
            color: var(--text-secondary);
            transition: all var(--ease);
        }

        .pager-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .pager-btn small {
            display: block;
            font-size: 12px;
            font-weight: 400;
            color: var(--text-light);
            margin-bottom: 2px;
        }

        .pager-btn p {
            font-size: 15px;
            font-weight: 600;
            color: rgba(0, 0, 0, 0.75);
            line-height: 1.4;
        }

        .pager-btn:hover p {
            color: var(--primary);
        }

        .pager-btn i {
            font-size: 18px;
            flex: 0 0 auto;
        }

        .pager-btn .pager-more {
            text-align: left;
        }

        .pager-btn.next {
            justify-content: flex-end;
        }

        .pager-btn.next .pager-more {
            text-align: right;
        }

        .section-block {
            margin-top: clamp(42px, 6vw, 76px);
        }

        .section-heading {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 22px;
        }

        .section-heading h2 {
            font-size: clamp(1.3rem, 1.8vw, 1.7rem);
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
        }

        .section-heading .section-more {
            font-size: 14px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .section-heading .section-more i {
            transition: transform .2s;
        }

        .section-heading .section-more:hover {
            color: var(--primary);
        }

        .section-heading .section-more:hover i {
            transform: translateX(3px);
        }

        .recommend-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .recommend-row {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--surface);
            border: 1px solid rgba(19, 107, 147, 0.08);
            border-radius: var(--radius-md);
            box-shadow: 0 1px 2px rgba(19, 107, 147, 0.03);
            padding: 14px 18px;
            transition: all var(--ease);
            min-height: 92px;
        }

        .recommend-row .recommend-cover {
            width: 108px;
            height: 72px;
            border-radius: 12px;
            object-fit: cover;
            flex: 0 0 auto;
            border: 1px solid var(--border);
        }

        .recommend-row:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(19, 107, 147, 0.2);
        }

        .recommend-info {
            min-width: 0;
            flex: 1;
        }

        .recommend-info h3 {
            font-size: 1.06rem;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .recommend-info p {
            font-size: 13.5px;
            color: var(--text-light);
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            line-height: 1.5;
            margin-top: 4px;
        }

        .recommend-arrow {
            color: var(--accent);
            font-size: 18px;
            flex: 0 0 auto;
            transition: transform .2s;
        }

        .recommend-row:hover .recommend-arrow {
            transform: translateX(4px);
        }

        .archived-card {
            display: flex;
            gap: 16px;
            padding: 24px;
            background: #FFFFFF;
            border: 1px dashed rgba(19, 107, 147, 0.20);
            border-radius: var(--radius-md);
        }

        .archived-card + .archived-card {
            margin-top: 10px;
        }

        .archived-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .archived-card .archived-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            flex: 0 0 auto;
            color: var(--primary);
        }

        .archived-card h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .archived-card p {
            font-size: 13px;
            line-height: 1.6;
            color: var(--text-light);
        }

        .article-readmore {
            margin-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .article-readmore .btn {
            font-size: 14px;
        }

        .callout-box {
            border-radius: var(--radius-lg);
            padding: 34px;
            background: var(--primary-dark);
            color: #EAEFF3;
            position: relative;
            overflow: hidden;
            margin-top: 74px;
        }

        .callout-box:after {
            content: "";
            position: absolute;
            right: -50px;
            top: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }

        .callout-box h2 {
            font-size: 1.65rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .callout-box p {
            color: #9FC2D4;
            max-width: 600px;
            font-size: 15px;
            line-height: 1.8;
        }

        .callout-box .callout-actions {
            margin-top: 24px;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .site-footer {
            background: var(--primary-dark);
            color: #C8DCE7;
            padding: 58px 40px 28px;
        }

        .footer-inner {
            max-width: 1180px;
            margin: 0 auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 34px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.14);
        }

        .footer-brand-card .brand {
            margin-bottom: 16px;
        }

        .footer-brand-card .brand i {
            background: rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
        }

        .footer-brand-card .brand span {
            color: #fff;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.85;
            color: #AFD0DF;
            max-width: 360px;
        }

        .footer-title {
            color: #FFFFFF;
            font-weight: 700;
            font-size: 15px;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

        .footer-links li {
            margin-bottom: 9px;
        }

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 14px;
            color: #B2D2DF;
            transition: color .2s ease, transform .2s ease;
        }

        .footer-links a i {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.55);
            transition: transform .2s;
        }

        .footer-links a:hover {
            color: #FFFFFF;
            transform: translateX(2px);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            padding-top: 26px;
            font-size: 13px;
            color: #93B9CB;
            line-height: 1.7;
        }

        .mobile-header {
            display: none;
        }

        .drawer-mask {
            display: none;
        }

        .mobile-drawer {
            display: none;
        }

        .back-to-top {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 80;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            box-shadow: 0 10px 16px rgba(19, 107, 147, 0.36);
            transition: background .2s ease, transform .2s ease;
        }

        .back-to-top:hover {
            background: var(--primary-hover);
            transform: translateY(-3px);
        }

        @media (max-width: 991px) {
            .side-nav {
                display: none;
            }

            .main-area {
                margin-left: 0;
            }

            .mobile-header {
                display: flex;
                position: sticky;
                top: 0;
                z-index: 100;
                align-items: center;
                justify-content: space-between;
                height: 64px;
                background: rgba(255, 255, 255, 0.92);
                backdrop-filter: blur(10px);
                border-bottom: 1px solid var(--border);
                padding: 0 22px;
            }

            .mobile-header .brand i {
                width: 34px;
                height: 34px;
                font-size: 15px;
                border-radius: 10px;
            }

            .mobile-header .brand-text {
                font-size: 17px;
            }

            .mobile-menu-btn {
                width: 46px;
                height: 46px;
                border-radius: 10px;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                color: var(--text);
                background: #F4F8FA;
                border: 1px solid var(--border);
                transition: background .2s;
            }

            .mobile-menu-btn:hover {
                background: var(--primary-soft);
                color: var(--primary);
            }

            .mobile-drawer {
                display: block;
                position: fixed;
                inset: 0;
                z-index: 130;
                pointer-events: none;
                visibility: hidden;
                transition: visibility .3s;
            }

            .mobile-drawer.is-open {
                pointer-events: auto;
                visibility: visible;
            }

            .drawer-mask {
                display: block;
                position: absolute;
                inset: 0;
                background: rgba(10, 25, 34, 0.35);
                opacity: 0;
                transition: opacity .3s ease;
            }

            .mobile-drawer.is-open .drawer-mask {
                opacity: 1;
            }

            .drawer-panel {
                position: absolute;
                left: 0;
                top: 0;
                bottom: 0;
                width: 300px;
                background: #fff;
                padding: 26px 20px 30px;
                transform: translateX(-102%);
                transition: transform .32s ease;
                overflow-y: auto;
            }

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

            .drawer-top {
                display: flex;
                align-items: center;
                justify-content: space-between;
                margin-bottom: 22px;
            }

            .drawer-close {
                width: 44px;
                height: 44px;
                border-radius: 10px;
                background: #F4F8FB;
                color: var(--text-secondary);
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .drawer-nav-title {
                padding: 0 12px;
                font-size: 12px;
                font-weight: 700;
                letter-spacing: 0.1em;
                color: var(--text-light);
                margin-bottom: 12px;
            }

            .article-page {
                padding: 36px 24px 70px;
            }

            .article-sheet {
                padding: 26px;
            }
        }

        @media (max-width: 767px) {
            .article-page {
                padding: 28px 16px 60px;
            }

            .article-sheet {
                padding: 22px 18px;
                border-radius: 16px;
            }

            .crumb {
                font-size: 12px;
            }

            .article-title {
                font-size: 1.55rem;
                line-height: 1.4;
            }

            .article-meta {
                gap: 6px 14px;
                font-size: 13px;
            }

            .pager-wrap {
                flex-direction: column;
            }

            .pager-btn {
                width: 100%;
            }

            .recommend-row {
                flex-wrap: nowrap;
                padding: 13px;
                min-height: 82px;
            }

            .recommend-row .recommend-cover {
                width: 90px;
                height: 64px;
            }

            .section-heading {
                align-items: flex-start;
            }

            .callout-box {
                padding: 28px 20px;
                border-radius: 16px;
            }

            .callout-box h2 {
                font-size: 1.35rem;
            }

            .site-footer {
                padding: 42px 22px 30px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .back-to-top {
                display: none;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category1 */
:root {
  --primary: #136B93;
  --primary-hover: #0F5778;
  --primary-active: #0B4661;
  --primary-soft: #E8F2F7;
  --accent: #EFA94D;
  --body-bg: #F5F8FA;
  --surface: #FFFFFF;
  --text: #1E2A36;
  --text-sub: #5B6E7C;
  --text-weak: #8A9AA6;
  --line: #E3EBF0;
  --card-border: rgba(19, 107, 147, 0.1);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 2px 4px rgba(19, 107, 147, 0.04), 0 14px 30px -12px rgba(19, 107, 147, 0.1);
  --shadow-hover: 0 4px 8px rgba(19, 107, 147, 0.06), 0 22px 36px -14px rgba(19, 107, 147, 0.16);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--body-bg);
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
}

p {
  margin: 0 0 16px;
}

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

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

figure {
  margin: 0;
}

button, input {
  font-family: inherit;
  color: inherit;
}

ul, ol {
  margin: 0;
  padding: 0;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 2000;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  transition: top .2s;
}
.skip-link:focus {
  top: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(19, 107, 147, .24);
}

.btn-primary:active {
  background: var(--primary-active);
  transform: translateY(0);
}

.btn-outline {
  background: var(--surface);
  border-color: #CFDEE7;
  color: var(--primary);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-1px);
}

.btn-outline:active {
  transform: translateY(0);
  background: #DCECF4;
}

.btn:focus-visible {
  outline: 3px solid rgba(19, 107, 147, .35);
  outline-offset: 2px;
}

.btn.is-faved {
  background: #FFF5E8;
  border-color: #F4CFA0;
  color: #BC6A1E;
}

.btn.is-faved i {
  color: var(--accent);
}

.mobile-topbar {
  position: sticky;
  top: 0;
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 18px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 6px 16px rgba(19, 107, 147, .06);
}

.mobile-brand,
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .02em;
}

.mobile-brand i,
.brand i {
  color: var(--primary);
  font-size: 22px;
}

.menu-toggle {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-soft);
  border: 0;
  border-radius: 12px;
  color: var(--primary);
  font-size: 20px;
  cursor: pointer;
  transition: background .2s, color .2s;
}

.menu-toggle:active {
  background: #D7EAF3;
}

.site-overlay {
  position: fixed;
  inset: 0;
  z-index: 1080;
  background: rgba(18, 38, 50, .46);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
}

body.nav-open .site-overlay {
  opacity: 1;
  pointer-events: auto;
}

.side-nav {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: min(302px, 86vw);
  z-index: 1150;
  display: flex;
  flex-direction: column;
  padding: 88px 18px 20px;
  background: var(--surface);
  border-right: 1px solid var(--line);
  transform: translateX(-103%);
  transition: transform .28s cubic-bezier(.4, 0, .2, 1);
}

body.nav-open .side-nav {
  transform: translateX(0);
  box-shadow: 18px 0 40px rgba(14, 53, 73, .16);
}

.side-brand {
  margin-bottom: 18px;
  padding: 0 10px;
  font-size: 19px;
}

.side-brand .brand-text {
  font-size: 19px;
}

.nav-label {
  margin: 0 12px 10px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-weak);
}

.side-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  margin: 4px 0;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  transition: background .2s, color .2s, transform .2s;
}

.side-nav .nav-link i {
  width: 20px;
  text-align: center;
  color: var(--text-weak);
  font-size: 16px;
  transition: color .2s;
}

.side-nav .nav-link:hover {
  background: #F3F7FA;
  color: var(--primary);
  transform: translateX(2px);
}

.side-nav .nav-link:hover i {
  color: var(--primary);
}

.side-nav .nav-link.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
}

.side-nav .nav-link.active::before {
  content: "";
  width: 3px;
  height: 18px;
  margin-left: -15px;
  border-radius: 3px;
  background: var(--primary);
}

.side-nav .nav-link.active i {
  color: var(--primary);
}

.side-actions {
  margin-top: auto;
  padding: 20px 6px 6px;
}

.side-note {
  padding: 14px 14px;
  border-radius: 14px;
  background: var(--primary-soft);
  font-size: 13px;
  color: var(--text-sub);
}

.side-note i {
  color: var(--primary);
  margin-right: 7px;
}

.t-wrap {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 clamp(18px, 4vw, 44px);
}

.main-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-shell main {
  flex: 1;
}

.module {
  padding: 88px 0;
}

.module-soft {
  background: #F0F6FA;
}

.section-head {
  max-width: 820px;
  margin-bottom: 44px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head.bottom-line {
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 2vw, 2rem);
}

.section-desc {
  margin-top: 10px !important;
  color: var(--text-sub);
  font-size: 16px;
  max-width: 76ch;
}

.page-hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 440px;
  padding: 70px 0;
  background:
    linear-gradient(105deg, rgba(232, 242, 247, .97) 0%, rgba(255, 255, 255, .86) 55%, rgba(255, 255, 255, .62) 100%),
    url("/assets/images/backpic/back-1.webp") right center / cover no-repeat;
}

.page-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -90px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 42px solid rgba(19, 107, 147, .06);
  pointer-events: none;
}

.page-hero .t-wrap {
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--text-weak);
}

.breadcrumb a:hover {
  color: var(--primary);
}

.page-hero h1 {
  font-size: clamp(2.15rem, 3.2vw, 3rem);
  letter-spacing: .02em;
}

.hero-lead {
  margin-top: 18px;
  max-width: 64ch;
  font-size: 17px;
  color: var(--text-sub);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 30px;
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 13.5px;
  color: var(--text-weak);
}

.quick-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 38px;
}

.quick-card {
  position: relative;
  display: block;
  padding: 30px 32px 32px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-card);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background .22s ease;
}

.quick-card:nth-child(even) {
  transform: translateY(10px);
}

.quick-card:hover {
  transform: translateY(-3px) !important;
  box-shadow: var(--shadow-hover);
  border-color: rgba(19, 107, 147, .22);
}

.quick-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 18px;
}

.quick-title {
  display: block;
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.quick-desc {
  display: block;
  font-size: 14.5px;
  color: var(--text-sub);
  line-height: 1.7;
}

.quick-arrow {
  position: absolute;
  right: 24px;
  top: 32px;
  color: var(--text-weak);
  transition: transform .2s, color .2s;
}

.quick-card:hover .quick-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

.step-panel {
  margin-top: 36px;
  background: var(--surface);
  border: 1px solid var(--card-border);
  border-radius: 22px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.step-item {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  padding: 30px 34px;
  border-bottom: 1px solid var(--line);
  transition: background .2s ease;
}

.step-item:last-child {
  border-bottom: 0;
}

.step-item:hover {
  background: #FAFDFE;
}

.step-marker {
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-top: 4px;
  box-shadow: 0 8px 18px rgba(19, 107, 147, .2);
}

.step-body h3 {
  font-size: 1.13rem;
  margin-bottom: 5px;
}

.step-body p {
  margin: 0;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.8;
}

.feature-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

.feature-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  aspect-ratio: 4 / 2.8;
  background: #DCE9F0;
}

.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.feature-media img:hover {
  transform: scale(1.03);
}

.split-rows {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.split-point {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(19, 107, 147, .04);
}

.split-point i {
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--primary-soft);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
}

.split-point h3 {
  font-size: 15.5px;
  margin-bottom: 3px;
}

.split-point p {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-sub);
}

.prep-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 46px;
  align-items: center;
}

.prep-list {
  display: grid;
  gap: 16px;
}

.prep-item {
  display: flex;
  gap: 18px;
  padding: 22px 24px;
  background: var(--surface);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.prep-index {
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #FFF3E2;
  color: #B8691C;
  font-size: 14px;
  font-weight: 800;
}

.prep-copy h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.prep-copy p {
  margin: 0;
  color: var(--text-sub);
  font-size: 14.5px;
}

.figure-card img {
  width: 100%;
  border-radius: 22px;
  box-shadow: var(--shadow-card);
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.figure-note {
  margin-top: 10px;
  text-align: center;
  font-size: 13px;
  color: var(--text-weak);
}

.notice-box {
  background: linear-gradient(135deg, #FFFFFF 0%, #EEF6FB 100%);
  border: 1px solid rgba(19, 107, 147, .16);
  border-radius: 22px;
  padding: 38px 44px;
  box-shadow: var(--shadow-card);
}

.notice-box-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.notice-box-heading i {
  color: var(--accent);
  font-size: 26px;
}

.notice-box h2 {
  font-size: 1.4rem;
}

.notice-box-intro {
  color: var(--text-sub);
  margin-bottom: 26px;
}

.notice-rows {
  display: grid;
  gap: 12px;
}

.notice-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 16px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
}

.notice-row i {
  color: var(--primary);
  margin-top: 4px;
  font-size: 17px;
}

.notice-row p {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-sub);
}

.faq-wrap {
  margin-top: 36px;
  max-width: 910px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}

.faq-item[open] {
  border-color: rgba(19, 107, 147, .18);
  box-shadow: var(--shadow-card);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: color .2s;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--primary);
  background: #FBFDFE;
}

.faq-item[open] summary {
  color: var(--primary);
}

.faq-icon {
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  transition: transform .25s ease, background .25s;
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}

.faq-answer {
  padding: 0 26px 24px;
}

.faq-answer p {
  margin: 0;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}

.visit-panel {
  display: flex;
  flex-direction: column;
  gap: 28px;
  background: var(--primary-active);
  color: #E9F2F7;
  border-radius: 24px;
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
}

.visit-panel::after {
  content: "";
  position: absolute;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  border: 50px solid rgba(255, 255, 255, .05);
  right: -70px;
  top: -70px;
}

.visit-copy, .visit-links {
  position: relative;
  z-index: 2;
}

.visit-copy h2 {
  color: #fff;
  font-size: clamp(1.4rem, 2vw, 1.9rem);
}

.visit-copy p {
  margin: 10px 0 0;
  color: rgba(233, 242, 247, .78);
}

.visit-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.visit-links .btn-primary {
  background: var(--accent);
  color: #3E2C15;
}

.visit-links .btn-primary:hover {
  background: #FFBE71;
}

.visit-links .btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, .48);
  color: #fff;
}

.visit-links .btn-outline:hover {
  background: rgba(255, 255, 255, .12);
  border-color: #fff;
}

.site-footer {
  background: var(--primary-active);
  color: #E9F2F7;
  margin-top: 70px;
  padding: 68px 0 0;
}

.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 44px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: 44px;
}

.footer-brand-card .brand {
  color: #fff;
  font-size: 20px;
}

.footer-brand-card .brand i {
  color: #F6C56F;
}

.footer-brand-card .footer-desc {
  margin-top: 16px;
  color: rgba(233, 242, 247, .72);
  font-size: 14.5px;
  max-width: 44ch;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: grid;
  gap: 11px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: rgba(233, 242, 247, .72);
  font-size: 14.5px;
  transition: color .2s, transform .2s;
}

.footer-links a:hover {
  color: #fff;
  transform: translateX(2px);
}

.footer-links a i {
  font-size: 11px;
  color: rgba(239, 169, 77, .75);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .14);
  padding: 24px 0 30px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  color: rgba(233, 242, 247, .56);
  font-size: 13px;
}

@media (min-width: 992px) {
  .mobile-topbar {
    display: none;
  }

  .site-overlay {
    display: none;
  }

  .side-nav {
    width: 272px;
    transform: none;
    padding: 30px 18px 22px;
    box-shadow: none;
  }

  body.nav-open .side-nav {
    box-shadow: none;
  }

  body.nav-open {
    overflow: auto;
  }

  .main-shell {
    margin-left: 272px;
  }

  .quick-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .feature-split {
    grid-template-columns: 1fr 1fr;
    gap: 58px;
  }

  .feature-split.reverse .feature-media {
    order: 2;
  }

  .prep-wrap {
    grid-template-columns: 1.08fr .92fr;
    gap: 56px;
  }

  .health-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

@media (max-width: 991.98px) {
  .page-hero {
    min-height: 420px;
  }
}

@media (max-width: 767.98px) {
  .module {
    padding: 64px 0;
  }

  .page-hero {
    min-height: auto;
    padding: 48px 0;
    background:
      linear-gradient(150deg, rgba(232, 242, 247, .98) 0%, rgba(255, 255, 255, .9) 80%),
      url("/assets/images/backpic/back-1.webp") center / cover no-repeat;
  }

  .page-hero h1 {
    font-size: 2rem;
  }

  .hero-lead {
    font-size: 15.5px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .quick-card {
    padding: 24px 22px 26px;
  }

  .quick-card:nth-child(even) {
    transform: none;
  }

  .step-item {
    flex-direction: column;
    gap: 10px;
    padding: 24px 22px;
  }

  .step-marker {
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    border-radius: 13px;
    font-size: 14px;
  }

  .notice-box {
    padding: 28px 20px;
  }

  .visit-panel {
    padding: 34px 24px;
  }

  .visit-links {
    width: 100%;
  }

  .visit-links .btn {
    flex: 1 1 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category2 */
:root {
    --brand: #136B93;
    --brand-hover: #0F5778;
    --brand-active: #0B4661;
    --brand-soft: #E8F2F7;
    --accent: #EFA94D;
    --bg: #F5F8FA;
    --surface: #FFFFFF;
    --text: #1E2A36;
    --text-secondary: #5B6E7C;
    --text-light: #8A9AA6;
    --line: #E3EBF0;
    --border: rgba(19, 107, 147, 0.10);
    --radius-lg: 20px;
    --radius: 14px;
    --radius-sm: 10px;
    --shadow: 0 2px 4px rgba(19, 107, 147, 0.04), 0 14px 30px -12px rgba(19, 107, 147, 0.10);
    --shadow-hover: 0 4px 8px rgba(19, 107, 147, 0.06), 0 22px 36px -14px rgba(19, 107, 147, 0.16);
    --transition: all .22s ease;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  }

  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  ul,
  ol {
    list-style: none;
  }

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

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

  button,
  input {
    font-family: inherit;
  }

  button {
    border: 0;
    background: none;
    cursor: pointer;
  }

  .mobile-header {
    display: none;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 272px;
    height: 100vh;
    background: var(--surface);
    border-right: 1px solid var(--line);
    z-index: 60;
    padding: 28px 18px 24px;
    overflow-y: auto;
    transition: transform .3s ease;
  }

  .side-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--line);
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 44px;
  }

  .brand-icon {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: var(--brand-soft);
    color: var(--brand);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
  }

  .brand-text {
    font-weight: 700;
    font-size: 17px;
    letter-spacing: .01em;
    color: var(--text);
    white-space: nowrap;
  }

  .side-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-top: 24px;
  }

  .nav-label {
    font-size: 13px;
    color: var(--text-light);
    letter-spacing: .06em;
    padding: 0 10px 8px;
  }

  .nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 46px;
    padding: 0 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
  }

  .nav-link i {
    width: 20px;
    text-align: center;
    color: var(--text-light);
    transition: var(--transition);
  }

  .nav-link:hover {
    background: #F0F5F8;
    color: var(--text);
  }

  .nav-link:hover i {
    color: var(--brand);
  }

  .nav-link.active {
    background: var(--brand-soft);
    color: var(--brand);
    font-weight: 600;
  }

  .nav-link.active i {
    color: var(--brand);
  }

  .nav-link.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 14px;
    bottom: 14px;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: var(--brand);
  }

  .side-footer-note {
    margin-top: 30px;
    background: var(--brand-soft);
    border-radius: var(--radius);
    padding: 18px 14px;
    border: 1px solid rgba(19, 107, 147, .08);
  }

  .side-footer-note .side-note-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--brand);
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .side-footer-note p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: 8px;
  }

  .main-wrap {
    margin-left: 272px;
    min-height: 100vh;
  }

  .cat-container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 28px;
  }

  .cat-hero {
    position: relative;
    margin: 28px 28px 40px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    min-height: 300px;
  }

  .cat-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
      linear-gradient(100deg, rgba(255, 255, 255, .95) 0, rgba(255, 255, 255, .88) 42%, rgba(255, 255, 255, .55) 68%, rgba(255, 255, 255, .18) 100%),
      url("/assets/images/backpic/back-2.webp") center / cover no-repeat;
    z-index: 0;
  }

  .cat-hero::after {
    content: "";
    position: absolute;
    width: 200px;
    height: 200px;
    right: -55px;
    top: -70px;
    border-radius: 50%;
    border: 1px solid rgba(19, 107, 147, .2);
    box-shadow: 0 0 0 26px rgba(19, 107, 147, .05), 0 0 0 48px rgba(19, 107, 147, .03);
    z-index: 1;
    pointer-events: none;
  }

  .cat-hero-inner {
    position: relative;
    z-index: 2;
    padding: clamp(36px, 5vw, 68px) clamp(28px, 4vw, 60px);
  }

  .breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 28px;
  }

  .breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .breadcrumb-list li + li::before {
    content: "/";
    color: var(--text-light);
  }

  .breadcrumb-list a {
    color: var(--text-secondary);
    transition: color .2s;
  }

  .breadcrumb-list a:hover {
    color: var(--brand);
  }

  .hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--brand-soft);
    color: var(--brand);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
  }

  .cat-hero h1 {
    font-size: clamp(1.9rem, 3vw, 2.7rem);
    line-height: 1.2;
    font-weight: 700;
    color: var(--text);
    letter-spacing: .01em;
  }

  .cat-hero .hero-desc {
    max-width: 680px;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.8;
    margin-top: 14px;
  }

  .hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
  }

  .hero-tags span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, .66);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 6px 13px;
    font-size: 13px;
    color: var(--text-secondary);
    backdrop-filter: blur(6px);
  }

  .hero-tags i {
    color: var(--brand);
  }

  .cat-page-body {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
    padding-bottom: 16px;
  }

  .sidebar-toc {
    position: sticky;
    top: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 22px 18px;
  }

  .toc-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--line);
  }

  .toc-title i {
    color: var(--brand);
  }

  .toc-list {
    margin-top: 12px;
    display: grid;
    gap: 4px;
  }

  .toc-list a {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 10px 10px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
    transition: var(--transition);
  }

  .toc-list a i {
    font-size: 12px;
    opacity: .7;
    transition: var(--transition);
  }

  .toc-list a:hover {
    background: var(--brand-soft);
    color: var(--brand);
    transform: translateX(3px);
  }

  .toc-list a.current {
    background: var(--brand-soft);
    color: var(--brand);
    font-weight: 600;
  }

  .right-pane {
    min-width: 0;
  }

  .content-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: clamp(26px, 3.6vw, 48px);
    margin-bottom: 26px;
  }

  .chapter-heading {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 26px;
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    font-weight: 700;
    line-height: 1.35;
    color: var(--text);
  }

  .chapter-heading i {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-soft);
    color: var(--brand);
    border-radius: 11px;
    font-size: 17px;
    flex: 0 0 auto;
  }

  .chapter-heading small {
    display: block;
    font-size: 13px;
    font-weight: 400;
    color: var(--text-light);
    margin-top: 2px;
  }

  .chapter-heading .heading-main {
    line-height: 1.3;
  }

  .text-lead {
    color: var(--text);
    font-size: 16px;
    line-height: 1.85;
  }

  .text-lead + p,
  .content-text p + p {
    margin-top: 16px;
  }

  .content-text {
    color: var(--text);
    line-height: 1.85;
  }

  .content-text p {
    margin-top: 14px;
  }

  .content-text p:first-child {
    margin-top: 0;
  }

  .content-text strong {
    color: var(--brand);
    font-weight: 600;
  }

  .figure-split {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 22px;
    align-items: center;
    margin-top: 28px;
    background: #FBFDFE;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px;
  }

  .figure-split img {
    border-radius: 12px;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    box-shadow: 0 8px 18px -8px rgba(19, 107, 147, .18);
  }

  .figure-split .fig-copy p {
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-top: 12px;
  }

  .figure-split .fig-copy p:first-child {
    margin-top: 0;
  }

  .stage-list {
    display: grid;
    gap: 12px;
    margin-top: 24px;
  }

  .stage-item {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    background: #FBFDFE;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px 20px;
    transition: var(--transition);
  }

  .stage-item:hover {
    border-color: rgba(19, 107, 147, .25);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
  }

  .stage-label {
    display: inline-block;
    width: fit-content;
    background: var(--brand-soft);
    color: var(--brand);
    font-size: 13px;
    font-weight: 600;
    padding: 5px 13px;
    border-radius: 999px;
    white-space: nowrap;
  }

  .stage-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin-top: 9px;
    color: var(--text);
  }

  .stage-item p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-top: 6px;
    line-height: 1.75;
  }

  .list-dot {
    display: grid;
    gap: 12px;
    margin-top: 18px;
  }

  .list-dot li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    background: #FBFDFE;
    border: 1px solid var(--line);
    border-radius: 12px;
    line-height: 1.75;
    font-size: 15px;
    color: var(--text-secondary);
    transition: var(--transition);
  }

  .list-dot li i {
    color: var(--brand);
    margin-top: 4px;
    flex: 0 0 auto;
  }

  .list-dot li strong {
    color: var(--text);
  }

  .checklist {
    margin-top: 20px;
  }

  .checklist li {
    position: relative;
    padding: 14px 16px 14px 48px;
    background: #FBFDFE;
    border: 1px solid var(--line);
    border-radius: 12px;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 10px;
  }

  .checklist li i {
    position: absolute;
    left: 15px;
    top: 17px;
    color: var(--brand);
  }

  .checklist li strong {
    color: var(--text);
  }

  .inline-quote {
    border-left: 4px solid var(--brand);
    background: var(--brand-soft);
    border-radius: 0 12px 12px 0;
    padding: 18px 22px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: 28px;
    font-size: 15px;
  }

  .faq-block {
    display: grid;
    gap: 12px;
    margin-top: 26px;
  }

  .faq-item {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: box-shadow .2s;
  }

  .faq-item[open] {
    border-color: rgba(19, 107, 147, .3);
    box-shadow: var(--shadow);
  }

  .faq-item summary {
    padding: 18px 52px 18px 20px;
    position: relative;
    cursor: pointer;
    list-style: none;
    font-weight: 600;
    font-size: 16px;
    color: var(--text);
    line-height: 1.5;
    min-height: 62px;
    display: flex;
    align-items: center;
    transition: color .2s;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary::after {
    content: "\f067";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    color: var(--text-light);
    transition: transform .25s ease, color .2s ease;
  }

  .faq-item[open] summary {
    color: var(--brand);
  }

  .faq-item[open] summary::after {
    content: "\f068";
    transform: translateY(-50%) rotate(180deg);
    color: var(--brand);
  }

  .faq-answer {
    padding: 0 20px 22px;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.8;
    border-top: 1px solid var(--line);
    margin-top: 0;
  }

  .faq-answer p {
    padding-top: 16px;
  }

  .cta-panel {
    background: linear-gradient(120deg, rgba(232, 242, 247, 1), rgba(232, 242, 247, .42));
    border: 1px solid rgba(19, 107, 147, .1);
    border-radius: var(--radius-lg);
    padding: clamp(28px, 4vw, 46px);
    margin: 10px 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    flex-wrap: wrap;
  }

  .cta-title {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    font-weight: 700;
    color: var(--text);
  }

  .cta-title i {
    color: var(--accent);
    margin-right: 5px;
  }

  .cta-desc {
    color: var(--text-secondary);
    font-size: 15px;
    margin-top: 8px;
    max-width: 520px;
  }

  .cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 44px;
    padding: 0 22px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
  }

  .btn:focus-visible,
  .nav-link:focus-visible,
  .faq-item summary:focus-visible,
  .toc-list a:focus-visible {
    outline: 3px solid rgba(19, 107, 147, .4);
    outline-offset: 2px;
  }

  .btn-primary {
    background: var(--brand);
    color: #fff;
    border: 1px solid var(--brand);
  }

  .btn-primary:hover {
    background: var(--brand-hover);
    border-color: var(--brand-hover);
    transform: translateY(-1px);
  }

  .btn-primary:active {
    background: var(--brand-active);
    border-color: var(--brand-active);
    transform: translateY(1px);
  }

  .btn-secondary {
    background: #fff;
    color: var(--brand);
    border: 1px solid rgba(19, 107, 147, .35);
  }

  .btn-secondary:hover {
    border-color: var(--brand);
    background: var(--brand-soft);
    transform: translateY(-1px);
  }

  .btn-secondary:active {
    transform: translateY(1px);
  }

  .btn-bookmark.on {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
  }

  .related-switch {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    background: var(--surface);
    border: 1px dashed rgba(19, 107, 147, .3);
    border-radius: var(--radius-lg);
    padding: 26px;
    margin-bottom: 36px;
    justify-content: space-between;
    align-items: center;
  }

  .related-switch-copy {
    font-size: 14px;
    color: var(--text-secondary);
  }

  .related-switch-copy strong {
    display: block;
    color: var(--text);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 2px;
  }

  .toast {
    position: fixed;
    left: 50%;
    bottom: 32px;
    transform: translate(-50%, 80px);
    background: var(--text);
    color: #fff;
    font-size: 14px;
    padding: 11px 18px;
    border-radius: 999px;
    z-index: 999;
    opacity: 0;
    transition: opacity .3s ease, transform .3s ease;
    pointer-events: none;
  }

  .toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
  }

  .site-footer {
    background: #0B4661;
    color: #d6e5ed;
    margin-top: 40px;
  }

  .footer-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 64px 28px 28px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr .8fr .95fr;
    gap: 48px;
  }

  .footer-brand-card .brand {
    color: #fff;
  }

  .footer-brand-card .brand-icon {
    background: rgba(255, 255, 255, .12);
    color: #fff;
  }

  .footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: #b6cedc;
    max-width: 420px;
    margin-top: 18px;
  }

  .footer-title {
    color: #fff;
    font-weight: 600;
    font-size: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, .12);
    margin-bottom: 18px;
  }

  .footer-links {
    display: grid;
    gap: 4px;
  }

  .footer-links a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    color: #c3d5df;
    font-size: 14px;
    transition: color .2s, padding-left .2s;
    border-radius: 6px;
  }

  .footer-links a i {
    font-size: 10px;
    color: rgba(255, 255, 255, .55);
    transition: color .2s;
  }

  .footer-links a:hover {
    color: #fff;
  }

  .footer-links a:hover i {
    color: var(--accent);
  }

  .footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    border-top: 1px solid rgba(255, 255, 255, .1);
    padding-top: 22px;
    margin-top: 46px;
    color: #9bb9c9;
    font-size: 13px;
  }

  @media (min-width: 1100px) {
    .figure-split {
      grid-template-columns: 1.15fr .85fr;
    }
  }

  @media (max-width: 991px) {
    .sidebar {
      transform: translateX(-100%);
      box-shadow: 0 24px 60px rgba(0, 0, 0, .16);
    }

    body.nav-open .sidebar {
      transform: translateX(0);
    }

    body.nav-open::before {
      content: "";
      position: fixed;
      inset: 0;
      background: rgba(11, 70, 97, .45);
      z-index: 55;
      backdrop-filter: blur(2px);
    }

    .mobile-header {
      position: sticky;
      top: 0;
      z-index: 70;
      height: 64px;
      background: var(--surface);
      border-bottom: 1px solid var(--line);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 18px;
      gap: 12px;
    }

    .mobile-header .brand {
      color: var(--text);
    }

    .mobile-header .brand-text {
      font-size: 16px;
    }

    .mobile-header .brand-icon {
      width: 34px;
      height: 34px;
      font-size: 16px;
    }

    .nav-toggle {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--brand-soft);
      color: var(--brand);
      font-size: 18px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .nav-toggle:active {
      background: var(--brand);
      color: #fff;
    }

    .main-wrap {
      margin-left: 0;
    }

    .cat-hero {
      margin: 18px 18px 32px;
    }

    .cat-page-body {
      grid-template-columns: 1fr;
      gap: 20px;
      padding: 0 18px;
    }

    .sidebar-toc {
      position: static;
    }

    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
  }

  @media (max-width: 700px) {
    .cat-outer {
      padding-top: 18px;
    }

    .cat-hero {
      margin: 14px 12px 26px;
    }

    .cat-hero-inner {
      padding: 34px 22px;
    }

    .cat-page-body {
      padding: 0 12px;
    }

    .content-card {
      padding: 24px 18px;
      border-radius: 16px;
    }

    .figure-split {
      grid-template-columns: 1fr;
      padding: 12px;
    }

    .stage-item {
      grid-template-columns: 1fr;
      gap: 8px;
      padding: 18px;
    }

    .stage-label {
      margin-bottom: 4px;
    }

    .cta-panel {
      padding: 26px 20px;
    }

    .cta-actions {
      width: 100%;
    }

    .cta-actions .btn {
      width: calc(50% - 6px);
      padding: 0 12px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .footer-inner {
      padding: 48px 20px 24px;
    }

    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }

    .list-dot li {
      padding: 13px 14px;
    }

    .chapter-heading {
      align-items: flex-start;
    }

    .chapter-heading i {
      margin-top: 4px;
    }
  }

  @media (max-width: 480px) {
    .cat-hero h1 {
      font-size: 1.7rem;
    }

    .hero-tags span {
      padding: 5px 10px;
      font-size: 12px;
    }

    .cta-actions {
      flex-direction: column;
    }

    .cta-actions .btn {
      width: 100%;
    }

    .faq-item summary {
      font-size: 15px;
      padding: 16px 48px 16px 16px;
    }

    .faq-answer {
      padding: 0 16px 20px;
    }

    .faq-item[open] summary {
      color: var(--brand);
    }
  }

  @media (prefers-reduced-motion: reduce) {
    * {
      animation: none !important;
      transition: none !important;
      scroll-behavior: auto !important;
    }
  }