/* roulang page: index */
:root {
  --bg: #F7F8FA;
  --surface: #FFFFFF;
  --ink: #12181F;
  --ink-2: #3F4B57;
  --ink-3: #6B7280;
  --line: #E5E7EB;
  --brand: #0D9488;
  --brand-deep: #0F766E;
  --brand-soft: rgba(13, 148, 136, 0.08);
  --accent: #F59E0B;
  --dark: #0F172A;
  --dark-2: #111827;
  --radius: 8px;
  --radius-sm: 6px;
  --shadow-card: 0 8px 30px rgba(15, 23, 42, 0.06);
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 720px; }

/* 顶部导航 */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 60;
  height: 70px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1280px;
  height: 70px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.logo-mark {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand);
  border-radius: 7px;
  transform: rotate(45deg);
  margin-right: 10px;
  flex: 0 0 26px;
  position: relative;
}
.logo-mark:after {
  content: "";
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 2px;
  display: block;
}
.nav-logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  align-items: center;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-link {
  font-size: 14px;
  color: var(--ink-2);
  padding: 22px 0;
  position: relative;
  transition: color .25s ease;
}
.nav-link:after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 16px;
  width: 0;
  height: 2px;
  background: var(--brand);
  transition: width .3s ease;
}
.nav-link:hover { color: var(--brand); }
.nav-link:hover:after { width: 100%; }
.nav-link.active { color: var(--brand); }
.nav-link.active:after { width: 100%; }
.nav-cta {
  margin-left: auto;
}
.btn-small {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--brand);
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-small:hover {
  background: var(--brand-deep);
  border-color: var(--brand-deep);
}
.btn-small:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.nav-burger {
  display: none;
  margin-left: auto;
  background: none;
  border: 0;
  padding: 8px;
}
.burger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  margin: 5px 0;
  transition: all .3s ease;
}
.nav-drawer {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: #fff;
  padding: 90px 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transform: translateY(-100%);
  transition: transform .35s ease;
}
.nav-drawer.open {
  transform: translateY(0);
}
.drawer-link {
  display: block;
  font-size: 18px;
  font-weight: 500;
  color: var(--ink);
  padding: 14px 4px;
  border-bottom: 1px solid #F0F2F5;
}
.drawer-link.active {
  color: var(--brand);
}

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand);
  border: 1px solid var(--brand);
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  padding: 12px 28px;
  transition: all .3s ease;
  white-space: nowrap;
}
.btn-primary:hover {
  background: var(--brand-deep);
  border-color: var(--brand-deep);
  transform: translateY(-2px);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #fff;
  font-size: 15px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  transition: all .3s ease;
  white-space: nowrap;
}
.btn-ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
}
.btn-ghost:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  font-size: 14px;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  transition: all .25s ease;
}
.btn-light:hover {
  border-color: var(--brand);
  color: var(--brand);
}

/* Hero */
.hero-wrap {
  background-color: var(--dark);
  color: #fff;
  overflow: hidden;
}
.hero-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: 90vh;
  display: flex;
  align-items: center;
  gap: 40px;
}
.hero-copy {
  flex: 1 1 52%;
  padding: 80px 0 60px;
  z-index: 2;
}
.hero-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.pill {
  display: inline-block;
  background: rgba(13, 148, 136, 0.16);
  border: 1px solid rgba(13, 148, 136, 0.4);
  color: #5EEAD4;
  font-size: 12px;
  border-radius: 999px;
  padding: 4px 12px;
}
.pill-dark {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.7);
}
.hero-copy .hero-topline {
  color: #94A3B8;
  font-size: 15px;
  font-weight: 400;
}
.hero-title-block h1 {
  margin: 0;
}
.hero-line-sm {
  display: block;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.35;
  color: #5EEAD4;
  margin-bottom: 10px;
}
.hero-line-lg {
  display: block;
  font-size: clamp(34px, 5.4vw, 58px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: #F8FAFC;
}
.hero-desc {
  max-width: 560px;
  margin-top: 28px;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.72);
}
.hero-stats {
  margin-top: 36px;
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}
.hero-stats li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.86);
}
.hero-stats li:before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--brand);
  border-radius: 50%;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}
.hero-visual {
  flex: 1 1 44%;
  align-self: stretch;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  min-height: 420px;
  border-radius: 14px;
  margin: 60px 0;
  box-shadow: 0 30px 50px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}
.hero-visual:after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(15, 23, 42, 0.15), rgba(15, 23, 42, 0.55) 70%, rgba(15, 23, 42, 0.75));
}
.hero-float-card {
  position: absolute;
  z-index: 3;
  left: 24px;
  right: 24px;
  bottom: 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-radius: 10px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.hero-float-card .text {
  font-size: 13px;
  color: #334155;
}
.hero-float-card .text strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
}
.hero-badge-new {
  display: inline-flex;
  background: var(--brand);
  color: #fff;
  border-radius: 6px;
  font-size: 12px;
  padding: 2px 8px;
  white-space: nowrap;
}
.hero-decoration {
  position: absolute;
  top: 10%;
  right: 6%;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(13, 148, 136, 0.1);
  filter: blur(16px);
  z-index: 1;
}
.animation-delay-1 { animation-delay: .1s; }
@keyframes heroFade {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-anim {
  opacity: 0;
  animation: heroFade .6s ease forwards;
}
.hero-anim-1 { animation-delay: .1s; }
.hero-anim-2 { animation-delay: .25s; }
.hero-anim-3 { animation-delay: .4s; }
.hero-anim-4 { animation-delay: .55s; }
.hero-anim-5 { animation-delay: .7s; }
.hero-anim-6 { animation-delay: .85s; }

/* 板块公共 */
.section {
  padding: 96px 0;
}
.section-alt {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section-head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}
.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--brand);
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.section-sub {
  margin-top: 16px;
  color: var(--ink-3);
  font-size: 16px;
  line-height: 1.8;
}

/* 概览卡片 */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.overview-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 32px 28px;
  transition: all .3s ease;
}
.overview-card:hover {
  border-color: #C3CDD6;
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}
.overview-num {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--ink-3);
  margin-bottom: 16px;
}
.overview-num .dot {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--brand);
}
.overview-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}
.overview-card p {
  color: var(--ink-3);
  font-size: 14px;
  line-height: 1.8;
}
.overview-card .line-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  color: var(--brand);
  font-weight: 500;
}

/* 合集目录 */
.catalog-section {
  background: linear-gradient(to bottom, var(--bg), #fff);
}
.catalog-list {
  max-width: 860px;
  margin: 0 auto;
}
.catalog-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
  transition: all .3s ease;
  cursor: pointer;
  text-align: left;
}
.catalog-item:hover .catalog-num {
  color: var(--brand);
}
.catalog-left {
  display: flex;
  align-items: center;
  gap: 28px;
  min-width: 0;
}
.catalog-num {
  font-size: 16px;
  font-weight: 500;
  color: #9BA6B0;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
  transition: color .3s ease;
}
.catalog-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}
.catalog-meta {
  color: var(--ink-3);
  font-size: 14px;
  margin-top: 6px;
  line-height: 1.6;
  max-width: 300px;
}
.catalog-arrow {
  color: #B6BEC7;
  transition: color .3s ease, transform .3s ease;
  flex: 0 0 auto;
}
.catalog-item:hover .catalog-arrow {
  color: var(--brand);
  transform: translateX(6px);
}

/* 图文场景区 */
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.scene-media {
  border-radius: 14px;
  overflow: hidden;
}
.scene-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  transition: all .6s ease;
}
.scene-card:hover .scene-media img { transform: scale(1.02); }
.scene-content h2 {
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1.4;
  margin: 16px 0 20px;
}
.scene-content .scene-para {
  color: var(--ink-3);
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.9;
}
.check-list {
  margin-top: 24px;
  list-style: none;
  padding: 0;
}
.check-list li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.8;
  margin-bottom: 10px;
}
.check-list li:before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--brand);
  border-radius: 50%;
  position: absolute;
  left: 8px;
  top: 12px;
}
.text-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand);
  font-weight: 600;
  font-size: 15px;
  padding: 10px 0;
}
.text-link-arrow:hover {
  color: var(--brand-deep);
  gap: 14px;
}

/* 最新动态列表 */
.latest-section {
  background: #fff;
}
.latest-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.latest-head h2 {
  font-size: clamp(26px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.3;
}
.latest-head p {
  color: var(--ink-3);
  font-size: 15px;
  margin-top: 10px;
  max-width: 680px;
  line-height: 1.8;
}
.news-list {
  display: flex;
  flex-direction: column;
}
.news-row {
  display: flex;
  align-items: stretch;
  gap: 24px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  transition: all .3s ease;
}
.news-row:first-child {
  border-top: 1px solid var(--line);
}
.news-row:hover .news-title {
  color: var(--brand);
}
.news-tag-time {
  flex: 0 0 190px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
}
.news-tag {
  display: inline-flex;
  align-items: center;
  background: #F3F4F6;
  border: 1px solid var(--line);
  color: #4B5563;
  border-radius: 6px;
  font-size: 12px;
  padding: 3px 10px;
  width: fit-content;
}
.news-tag.is-new {
  background: rgba(13, 148, 136, 0.08);
  border-color: rgba(13, 148, 136, 0.25);
  color: #0F766E;
}
.news-time {
  font-size: 13px;
  color: #9CA3AF;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.news-main {
  flex: 1 1 auto;
  min-width: 0;
}
.news-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  transition: color .3s ease;
  margin-bottom: 8px;
}
.news-summary {
  color: var(--ink-3);
  font-size: 14px;
  line-height: 1.75;
}
.news-arrow {
  display: flex;
  align-items: center;
  color: #9CA3AF;
  font-size: 20px;
  transition: all .3s ease;
  padding-left: 6px;
}
.news-row:hover .news-arrow {
  color: var(--brand);
  transform: translateX(6px);
}
.empty-note {
  text-align: center;
  padding: 90px 0;
  font-size: 15px;
  color: #9CA3AF;
}
.empty-note:before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #E5E7EB;
  margin-right: 8px;
}

/* 推荐卡片 */
.recommend-section {
  background: var(--bg);
}
.recommend-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.rec-card {
  display: flex;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  transition: all .3s ease;
}
.rec-card:hover {
  border-color: #C3CDD6;
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.rec-card-media {
  flex: 0 0 42%;
  max-height: 220px;
  overflow: hidden;
}
.rec-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.rec-card-body {
  flex: 1 1 auto;
  padding: 24px 26px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}
.rec-card-body .rec-label {
  font-size: 12px;
  color: var(--brand);
  font-weight: 600;
}
.rec-card-body h3 {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.5;
}
.rec-card-body p {
  color: var(--ink-3);
  font-size: 14px;
  line-height: 1.7;
}
.rec-link {
  margin-top: 12px;
  font-size: 14px;
  color: var(--brand);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.rec-link:hover { gap: 12px; }

/* FAQ 折叠 */
.faq-section {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}
.faq-item:first-child {
  border-top: 1px solid var(--line);
}
.faq-question {
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
  cursor: pointer;
  border: 0;
  background: no-repeat;
  width: 100%;
  text-align: left;
  transition: color .25s ease;
}
.faq-question:hover { color: var(--brand); }
.faq-btn-icon {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  position: relative;
  display: block;
}
.faq-btn-icon:before,
.faq-btn-icon:after {
  content: "";
  position: absolute;
  width: 14px;
  height: 1px;
  background: #94A3B8;
  top: 50%;
  left: 50%;
}
.faq-btn-icon:before { transform: translate(-50%, -50%); }
.faq-btn-icon:after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform .25s ease;
}
summary { list-style: none; }
summary::-webkit-details-marker { display: none; }
details[open] .faq-btn-icon:after { transform: translate(-50%, -50%) rotate(0deg); }
details[open] .faq-question { color: var(--brand); }
.faq-answer {
  padding: 0 0 24px;
  color: var(--ink-3);
  font-size: 15px;
  line-height: 1.9;
  max-width: 780px;
}
.faq-answer a {
  color: var(--brand);
  font-weight: 500;
}
.faq-more-link {
  margin-top: 10px;
  display: inline-block;
  color: var(--brand);
  font-size: 14px;
  font-weight: 500;
}

/* CTA 收藏区 */
.save-section {
  background: var(--dark);
  color: #fff;
  text-align: center;
  padding: 96px 0;
}
.save-section .section-sub {
  color: rgba(255, 255, 255, 0.65);
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.btn-outline-light {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.36);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 14px;
  padding: 10px 24px;
  transition: all .3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-outline-light:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.06);
}
.divider-line {
  margin-top: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  color: rgba(255, 255, 255, 0.25);
  font-size: 13px;
}
.divider-line:before,
.divider-line:after {
  content: "";
  width: 60px;
  height: 1px;
  background: rgba(255, 255, 255, 0.18);
}
.copied-state {
  color: #5EEAD4 !important;
}

/* 页脚 */
.footer {
  background: #12181F;
  color: #94A3B8;
  padding: 64px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 52px;
}
.footer-logo {
  font-size: 16px;
  font-weight: 600;
  color: #F1F5F9;
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 16px;
}
.footer-logo .mini-mark {
  width: 20px;
  height: 20px;
  background: var(--brand);
  border-radius: 6px;
  display: inline-block;
  margin-right: 10px;
}
.footer p {
  font-size: 14px;
  line-height: 1.9;
  color: rgba(148, 163, 184, 0.8);
}
.footer h4 {
  color: #E2E8F0;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  padding: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  font-size: 14px;
  color: #94A3B8;
  transition: color .25s ease;
}
.footer-links a:hover {
  color: #2DD4BF;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  font-size: 13px;
  color: #64748B;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
}

/* 回到顶部 */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 50;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(15,23,42,0.08);
  font-size: 18px;
  color: var(--ink-3);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: all .3s ease;
}
.to-top.show {
  opacity: 1;
  pointer-events: auto;
}
.to-top:hover {
  color: var(--brand);
  border-color: var(--brand);
}

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

@media (max-width: 1024px) {
  .nav-links { gap: 16px; display: flex; }
  .hero-inner { gap: 28px; }
  .hero-line-lg { font-size: 44px; }
  .overview-grid { grid-template-columns: 1fr; gap: 16px; }
  .scroll-flex { overflow-x: auto; }
}

@media (max-width: 900px) {
  .nav-links, .nav-cta {
    display: none;
  }
  .nav-burger {
    display: block;
  }
  .hero-inner {
    flex-direction: column;
    padding-top: 30px;
    padding-bottom: 50px;
  }
  .hero-copy {
    padding: 40px 0 10px;
  }
  .hero-visual {
    width: 100%;
    margin: 20px 0 40px;
    min-height: 360px;
  }
  .scene-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .scene-media img {
    aspect-ratio: 16 / 10;
  }
  .recommend-grid {
    grid-template-columns: 1fr;
  }
  .rec-card {
    flex-direction: column;
  }
  .rec-card-media {
    flex: none;
  }
  .rec-card-media img {
    aspect-ratio: 16 / 9;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .nav-inner {
    padding: 0 18px;
  }
  .nav-logo { font-size: 14px; }
  .news-row {
    flex-direction: column;
    gap: 12px;
    padding: 22px 0;
  }
  .news-tag-time {
    flex-direction: row;
    flex-basis: auto;
    justify-content: flex-start;
    align-items: center;
  }
  .news-arrow {
    display: none;
  }
  .catalog-item {
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
  }
  .catalog-left {
    gap: 18px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    min-height: 260px;
  }
}

/* roulang page: category1 */
:root {
            --bg: #F7F8FA;
            --panel: #FFFFFF;
            --ink: #12181F;
            --muted: #4B5563;
            --line: #E5E7EB;
            --line-deep: #CBD5E1;
            --brand: #0D9488;
            --brand-dark: #0F766E;
            --accent: #F59E0B;
            --deep: #0F172A;
            --radius: 8px;
            --radius-lg: 12px;
            --shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            background: var(--bg);
            color: var(--ink);
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.85;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }
        h1,
        h2,
        h3,
        h4 {
            margin: 0;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: 0.01em;
            color: var(--ink);
        }
        p {
            margin: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
            border: 0;
            background: none;
            cursor: pointer;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            width: min(1120px, calc(100% - 40px));
            margin: 0 auto;
        }

        /* ===== 导航 ===== */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 50;
            height: 70px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--line);
        }
        .nav-inner {
            width: min(1280px, calc(100% - 40px));
            height: 70px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--ink);
            white-space: nowrap;
        }
        .logo-mark {
            position: relative;
            width: 30px;
            height: 30px;
            border-radius: 8px;
            background: var(--deep);
            flex: 0 0 30px;
            overflow: hidden;
        }
        .logo-mark::before {
            content: "";
            position: absolute;
            left: 6px;
            top: 7px;
            width: 10px;
            height: 16px;
            background: var(--brand);
            border-radius: 3px;
        }
        .logo-mark::after {
            content: "";
            position: absolute;
            right: 5px;
            top: 5px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 26px;
        }
        .nav-link {
            position: relative;
            display: inline-block;
            font-size: 14px;
            color: #2D3748;
            line-height: 70px;
            font-weight: 500;
        }
        .nav-link:hover {
            color: var(--brand-dark);
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 18px;
            height: 2px;
            background: var(--brand);
            transform: scaleX(0);
            transform-origin: right;
            transition: transform .3s ease;
        }
        .nav-link:hover::after {
            transform: scaleX(1);
            transform-origin: left;
        }
        .nav-link.active {
            color: var(--brand-dark);
            font-weight: 700;
        }
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .btn-small {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 18px;
            font-size: 14px;
            font-weight: 600;
            line-height: 1.4;
            border-radius: 6px;
            color: #fff;
            background: var(--brand);
            transition: background .25s ease, transform .25s ease;
            white-space: nowrap;
        }
        .btn-small:hover {
            background: var(--brand-dark);
            transform: translateY(-1px);
        }
        .btn-small:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .nav-burger {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            border: 1px solid var(--line);
            border-radius: var(--radius);
        }
        .burger-line {
            width: 18px;
            height: 1.5px;
            background: var(--ink);
            display: block;
        }
        .mobile-menu {
            position: fixed;
            top: 0;
            right: 0;
            width: 100%;
            min-height: 100vh;
            z-index: 70;
            background: #FFFFFF;
            padding: 90px 36px 40px;
            display: none;
            box-shadow: var(--shadow);
        }
        .mobile-menu.is-open {
            display: block;
        }
        .mobile-menu-link {
            display: block;
            padding: 16px 0;
            font-size: 16px;
            border-bottom: 1px solid #F0F2F5;
            color: var(--ink);
        }
        .mobile-menu-link.active {
            color: var(--brand-dark);
            font-weight: 700;
        }
        .mobile-close {
            position: absolute;
            top: 18px;
            right: 22px;
            font-size: 14px;
            color: var(--muted);
            padding: 8px 12px;
            border: 1px solid var(--line);
            border-radius: 6px;
        }
        .mobile-cta {
            display: inline-flex;
            margin-top: 26px;
            padding: 12px 24px;
            background: var(--brand);
            color: #fff;
            border-radius: 6px;
            font-weight: 600;
        }

        /* ===== 分类栏目标题区 ===== */
        .cat-head {
            padding: 72px 0 48px;
            border-bottom: 1px solid var(--line);
            background: var(--panel);
        }
        .cat-head-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 280px;
            gap: 60px;
            align-items: end;
        }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            letter-spacing: 0.06em;
            color: var(--brand-dark);
            margin-bottom: 18px;
            font-weight: 600;
        }
        .eyebrow::before {
            content: "";
            width: 20px;
            height: 2px;
            background: var(--brand);
            display: block;
        }
        .cat-head h1 {
            font-size: clamp(32px, 4vw, 44px);
            font-weight: 800;
            letter-spacing: 0.02em;
            line-height: 1.2;
            margin-bottom: 24px;
        }
        .cat-head-desc {
            font-size: 16px;
            color: var(--muted);
            max-width: 680px;
            line-height: 1.9;
        }
        .cat-deco img {
            width: 280px;
            height: 160px;
            object-fit: cover;
            border-radius: 10px;
            border: 1px solid var(--line);
        }

        /* ===== 筛选文本行 ===== */
        .dir-line {
            border-bottom: 1px solid var(--line);
            padding: 16px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 14px;
        }
        .dir-line b {
            font-weight: 700;
            color: var(--ink);
        }
        .dir-keys a {
            display: inline-block;
            margin-left: 12px;
            color: var(--brand-dark);
            font-weight: 600;
        }
        .dir-keys a:hover {
            color: var(--accent);
        }
        .dir-count {
            color: var(--muted);
        }

        /* ===== 宽卡片入口流 ===== */
        .entry-collection {
            padding: 58px 0 28px;
        }
        .section-head {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }
        .section-kicker {
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-dark);
            letter-spacing: 0.04em;
            margin-bottom: 8px;
            display: block;
        }
        .section-head h2 {
            font-size: clamp(22px, 3vw, 28px);
            font-weight: 800;
        }
        .section-note {
            font-size: 14px;
            color: var(--muted);
        }
        .entry-stack {
            display: grid;
            gap: 28px;
        }
        .entry-card {
            display: grid;
            grid-template-columns: 280px minmax(0, 1fr);
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            overflow: hidden;
            transition: border-color .3s ease, box-shadow .3s ease, transform .3s ease;
            scroll-margin-top: 96px;
        }
        .entry-card:hover {
            border-color: var(--line-deep);
            box-shadow: var(--shadow);
            transform: translateY(-1px);
        }
        .entry-thumb {
            position: relative;
            overflow: hidden;
            min-height: 200px;
            background: #EFF3F5;
        }
        .entry-thumb img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .entry-card:hover .entry-thumb img {
            transform: scale(1.03);
        }
        .entry-body {
            padding: 28px 34px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .entry-tags {
            display: flex;
            gap: 8px;
            margin-bottom: 14px;
            flex-wrap: wrap;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 2px 10px;
            font-size: 12px;
            border-radius: 6px;
            border: 1px solid var(--line);
            background: #F9FAFB;
            color: var(--muted);
            font-weight: 500;
        }
        .tag-primary {
            color: var(--brand-dark);
            border-color: #99D5CF;
            background: #F0FDFA;
        }
        .entry-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .entry-body p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 18px;
        }
        .entry-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-dark);
        }
        .text-link::after {
            content: "→";
            transition: transform .3s ease;
        }
        .text-link:hover::after {
            transform: translateX(4px);
        }
        .entry-label {
            font-size: 13px;
            color: var(--muted);
        }

        /* ===== 细线子项索引 ===== */
        .sub-index {
            padding: 52px 0 40px;
        }
        .index-panel {
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
        }
        .index-panel-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--line);
            padding-bottom: 18px;
            margin-bottom: 6px;
        }
        .index-panel-head h2 {
            font-size: 20px;
            font-weight: 800;
        }
        .index-panel-head span {
            font-size: 13px;
            color: var(--muted);
        }
        .index-row {
            display: grid;
            grid-template-columns: 52px minmax(0, 1fr) auto 34px;
            align-items: center;
            gap: 18px;
            padding: 15px 4px;
            border-bottom: 1px solid #F1F3F5;
            transition: background .2s ease;
        }
        .index-row:last-child {
            border-bottom: 0;
        }
        .index-row:hover {
            background: #FAFCFC;
        }
        .idx-no {
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            font-variant-numeric: tabular-nums;
        }
        .idx-title {
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
        }
        .idx-tag {
            font-size: 12px;
            color: var(--muted);
            padding: 2px 10px;
            border: 1px solid var(--line);
            border-radius: 6px;
            white-space: nowrap;
        }
        .idx-title small {
            display: block;
            font-size: 13px;
            font-weight: 400;
            color: var(--muted);
            margin-top: 3px;
        }
        .idx-arrow {
            text-align: right;
            color: var(--muted);
            font-size: 18px;
            transition: transform .3s ease;
        }
        .index-row:hover .idx-arrow {
            color: var(--brand);
            transform: translateX(4px);
        }

        /* ===== 提示条 ===== */
        .notice-band {
            background: #FFFDF5;
            border-top: 1px solid #F1E8D8;
            border-bottom: 1px solid #F1E8D8;
            padding: 14px 0;
        }
        .notice-band p {
            font-size: 14px;
            color: #6B6256;
            text-align: center;
        }
        .notice-band strong {
            color: #A16207;
            font-weight: 600;
            margin-right: 6px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 72px 0 60px;
        }
        .faq-grid {
            display: grid;
            gap: 14px;
            margin-top: 30px;
        }
        .faq-item {
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            transition: border-color .25s ease;
            overflow: hidden;
        }
        .faq-item[open] {
            border-color: var(--line-deep);
        }
        .faq-item summary {
            position: relative;
            padding: 18px 56px 18px 24px;
            font-size: 16px;
            font-weight: 600;
            line-height: 1.6;
            cursor: pointer;
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "";
            position: absolute;
            right: 22px;
            top: 50%;
            width: 13px;
            height: 13px;
            border-right: 1.5px solid var(--brand);
            border-bottom: 1.5px solid var(--brand);
            transform: translateY(-70%) rotate(45deg);
            transition: transform .25s ease;
        }
        .faq-item[open] summary::after {
            transform: translateY(-30%) rotate(225deg);
        }
        .faq-body {
            padding: 0 24px 22px 24px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.9;
            border-top: 1px solid #F1F3F5;
            margin-top: 2px;
            padding-top: 14px;
        }
        .faq-body .read-more {
            display: inline-block;
            margin-top: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-dark);
        }
        .faq-body .read-more:hover {
            color: var(--accent);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 24px 0 90px;
        }
        .cta-panel {
            background: var(--deep);
            border-radius: var(--radius-lg);
            padding: 56px 54px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 36px;
            flex-wrap: wrap;
            color: #fff;
        }
        .cta-panel h2 {
            color: #fff;
            font-size: clamp(20px, 2.6vw, 28px);
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-panel p {
            color: rgba(255, 255, 255, .7);
            max-width: 560px;
            font-size: 15px;
        }
        .cta-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            color: #fff;
            background: var(--brand);
            font-size: 15px;
            font-weight: 600;
            padding: 11px 22px;
            transition: background .25s ease, transform .25s ease;
        }
        .btn-primary:hover {
            background: #14B8A6;
            transform: translateY(-1px);
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            color: #E7E5E4;
            border: 1px solid rgba(255, 255, 255, .35);
            font-size: 15px;
            font-weight: 500;
            padding: 10px 20px;
            transition: border-color .25s ease, color .25s ease, transform .25s ease;
            background: transparent;
        }
        .btn-outline-light:hover {
            border-color: #fff;
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-outline-light:focus-visible,
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--deep);
            padding: 80px 0 30px;
            color: rgba(255, 255, 255, .68);
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 44px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, .12);
        }
        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 17px;
            margin-bottom: 14px;
        }
        .mini-mark {
            width: 26px;
            height: 26px;
            background: var(--brand);
            border-radius: 7px;
            position: relative;
            display: inline-block;
            overflow: hidden;
        }
        .mini-mark::after {
            content: "";
            position: absolute;
            right: 4px;
            top: 5px;
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
        }
        .footer p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, .55);
            max-width: 340px;
        }
        .footer h4 {
            color: #fff;
            font-size: 14px;
            margin-bottom: 16px;
            letter-spacing: .02em;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 8px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            transition: color .2s ease;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 28px;
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
        }
        .footer-bottom span:last-child {
            font-variant-numeric: tabular-nums;
        }

        /* ===== 动画与断点 ===== */
        @keyframes riseFade {
            0% { opacity: 0; transform: translateY(14px); }
            100% { opacity: 1; transform: translateY(0); }
        }
        .cat-head .eyebrow {
            animation: riseFade .5s ease both;
        }
        .cat-head h1 {
            animation: riseFade .6s .08s ease both;
        }
        .cat-head-desc {
            animation: riseFade .6s .16s ease both;
        }

        @media (max-width: 1024px) {
            .cat-head-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cat-deco {
                display: none;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 860px) {
            .nav-links,
            .nav-cta {
                display: none;
            }
            .nav-burger {
                display: inline-flex;
            }
            .entry-collection {
                padding-top: 44px;
            }
            .cta-panel {
                padding: 40px 24px;
            }
        }
        @media (max-width: 768px) {
            .entry-card {
                grid-template-columns: 1fr;
            }
            .entry-thumb {
                min-height: 220px;
            }
            .entry-body {
                padding: 24px 22px;
            }
            .footer-top {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
            }
        }
        @media (max-width: 560px) {
            .container {
                width: min(1120px, calc(100% - 28px));
            }
            .nav-inner {
                width: calc(100% - 28px);
            }
            .cat-head {
                padding: 40px 0 28px;
            }
            .dir-line {
                align-items: flex-start;
                flex-direction: column;
            }
            .dir-keys {
                width: 100%;
                display: flex;
                flex-wrap: wrap;
                gap: 4px 10px;
            }
            .index-panel {
                padding: 20px 16px;
            }
            .index-row {
                grid-template-columns: 36px minmax(0, 1fr) 22px;
                gap: 8px;
                padding: 12px 2px;
            }
            .idx-tag {
                display: none;
            }
            .section-head {
                align-items: flex-start;
                flex-direction: column;
            }
            .cta-btns {
                width: 100%;
            }
            .btn-primary,
            .btn-outline-light {
                width: 100%;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            *,
            *::before,
            *::after {
                animation: none !important;
                transition: none !important;
            }
        }

/* roulang page: article */
:root {
        --brand: #0D9488;
        --brand-dark: #0F766E;
        --accent: #F59E0B;
        --ink: #12181F;
        --muted: #4B5563;
        --panel: #0F172A;
        --bg: #F7F8FA;
        --card: #FFFFFF;
        --line: #E5E7EB;
        --radius: 8px;
        --radius-lg: 12px;
        --shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        background: var(--bg);
        color: var(--ink);
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        font-size: 16px;
        line-height: 1.85;
        -webkit-font-smoothing: antialiased;
    }

    img {
        max-width: 100%;
        height: auto;
    }

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

    button {
        font-family: inherit;
        cursor: pointer;
    }

    .container {
        width: 100%;
        max-width: 1120px;
        margin-left: auto;
        margin-right: auto;
        padding: 0 24px;
    }

    .article-container {
        max-width: 860px;
        padding-top: 48px;
        padding-bottom: 96px;
    }

    .site-nav {
        position: sticky;
        top: 0;
        z-index: 50;
        height: 70px;
        background: rgba(247, 248, 250, 0.92);
        border-bottom: 1px solid var(--line);
    }

    .nav-inner {
        max-width: 1280px;
        height: 100%;
        margin: 0 auto;
        padding: 0 24px;
        display: flex;
        align-items: center;
        gap: 32px;
    }

    .nav-logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 16px;
        font-weight: 600;
        color: var(--ink);
        letter-spacing: 0.02em;
        margin-right: 8px;
        white-space: nowrap;
    }

    .logo-mark,
    .mini-mark {
        position: relative;
        display: inline-block;
        width: 14px;
        height: 14px;
        border-radius: 4px;
        background: var(--brand);
        flex: 0 0 auto;
    }

    .logo-mark::after {
        content: "";
        position: absolute;
        right: -4px;
        bottom: -4px;
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--accent);
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 30px;
    }

    .nav-link {
        position: relative;
        font-size: 14px;
        color: #2D3748;
        padding: 22px 0 18px;
        transition: color .25s ease;
        border-bottom: 2px solid transparent;
        letter-spacing: 0.01em;
    }

    .nav-link:hover {
        color: var(--brand-dark);
        border-bottom-color: var(--brand);
    }

    .nav-link.active {
        color: var(--ink);
        border-bottom-color: var(--brand);
        font-weight: 500;
    }

    .btn-small {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 36px;
        padding: 0 18px;
        border-radius: 6px;
        border: 1px solid transparent;
        background: var(--brand);
        color: #fff;
        font-size: 13px;
        font-weight: 500;
        letter-spacing: 0.02em;
        transition: background .25s ease, transform .25s ease, box-shadow .25s ease;
        white-space: nowrap;
    }

    .btn-small:hover {
        background: var(--brand-dark);
        transform: translateY(-1px);
        box-shadow: 0 6px 16px rgba(13, 148, 136, 0.22);
    }

    .btn-small:focus-visible,
    .nav-link:focus-visible,
    .action-btn:focus-visible,
    .nav-burger:focus-visible,
    .breadcrumb a:focus-visible {
        outline: 2px solid var(--brand);
        outline-offset: 3px;
        border-radius: 4px;
    }

    .nav-burger {
        display: none;
        margin-left: auto;
        width: 42px;
        height: 42px;
        align-items: center;
        justify-content: center;
        background: transparent;
        border: 1px solid var(--line);
        border-radius: 8px;
        flex-direction: column;
        gap: 4px;
    }

    .burger-line {
        display: block;
        width: 18px;
        height: 1.5px;
        background: var(--ink);
        border-radius: 2px;
        transition: transform .25s ease, opacity .25s ease;
    }

    .nav-burger[aria-expanded="true"] .burger-line:first-child {
        transform: translateY(3px) rotate(45deg);
    }

    .nav-burger[aria-expanded="true"] .burger-line:last-child {
        transform: translateY(-2.5px) rotate(-45deg);
    }

    .mobile-menu {
        position: fixed;
        inset: 70px 0 0 0;
        z-index: 45;
        background: var(--card);
        padding: 34px 28px 48px;
        display: flex;
        flex-direction: column;
        gap: 6px;
        transform: translateY(-12px);
        opacity: 0;
        pointer-events: none;
        transition: opacity .25s ease, transform .25s ease;
        border-bottom: 1px solid var(--line);
        overflow-y: auto;
    }

    .mobile-menu.open {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .mobile-menu a {
        font-size: 16px;
        padding: 13px 4px;
        color: var(--ink);
        border-bottom: 1px solid #F1F2F4;
    }

    .mobile-menu .menu-btn {
        margin-top: 18px;
        justify-content: center;
        background: var(--brand);
        color: #fff;
        width: 100%;
        border: none;
        border-radius: 6px;
    }

    .breadcrumb {
        font-size: 13px;
        color: #6B7280;
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        align-items: center;
        margin-bottom: 42px;
    }

    .breadcrumb a {
        color: var(--brand-dark);
        transition: color .2s ease;
    }

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

    .article-card {
        background: var(--card);
        border: 1px solid var(--line);
        border-radius: var(--radius-lg);
        padding: clamp(28px, 5vw, 56px);
        box-shadow: var(--shadow);
    }

    .article-eyebrow {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 12px;
        margin-bottom: 18px;
    }

    .eyeb-row {
        font-size: 13px;
        letter-spacing: 0.12em;
        color: var(--brand-dark);
        font-weight: 500;
    }

    .badge-chip {
        display: inline-flex;
        align-items: center;
        min-height: 24px;
        padding: 0 10px;
        border: 1px solid #CDE8E4;
        border-radius: 6px;
        background: #F5FCFA;
        color: #0F766E;
        font-size: 12px;
        font-weight: 500;
        letter-spacing: 0.02em;
    }

    .article-title {
        margin: 8px 0 18px;
        font-size: 38px;
        line-height: 1.32;
        font-weight: 800;
        color: var(--ink);
        letter-spacing: 0.01em;
        max-width: 720px;
    }

    .article-summary {
        margin: 0 0 26px;
        font-size: 16px;
        line-height: 1.95;
        color: var(--muted);
        max-width: 720px;
    }

    .article-meta-row {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 12px 28px;
        padding-bottom: 20px;
        border-bottom: 1px solid var(--line);
        margin-bottom: 36px;
        font-size: 13px;
        color: #6B7280;
    }

    .meta-item {
        display: inline-flex;
        align-items: center;
        gap: 7px;
    }

    .article-body {
        max-width: 720px;
        margin: 0 auto;
        font-size: 17px;
        line-height: 1.9;
        color: #1F2937;
        word-break: break-word;
    }

    .article-body > * {
        margin-top: 0;
        margin-bottom: 1.6em;
    }

    .article-body p {
        margin-bottom: 1.85em;
    }

    .article-body h2,
    .article-body h3 {
        color: var(--ink);
        letter-spacing: 0.015em;
    }

    .article-body h2 {
        font-size: 26px;
        line-height: 1.45;
        margin-top: 2.3em;
        margin-bottom: 0.9em;
        padding-bottom: 8px;
        border-bottom: 1px solid #EEF0F2;
    }

    .article-body h3 {
        font-size: 20px;
        line-height: 1.5;
        margin-top: 1.9em;
        margin-bottom: 0.8em;
    }

    .article-body a {
        color: var(--brand-dark);
        text-decoration: underline;
        text-decoration-color: rgba(13, 148, 136, 0.42);
        text-underline-offset: 5px;
        transition: color .2s ease;
    }

    .article-body a:hover {
        color: var(--brand);
        text-decoration-color: var(--brand);
    }

    .article-body img {
        border-radius: 10px;
        border: 1px solid var(--line);
        display: block;
        margin: 2.2em auto;
    }

    .article-body blockquote {
        margin: 2em 0;
        padding: 20px 24px;
        border-left: 3px solid var(--brand);
        background: #F5FCFA;
        border-radius: 0 8px 8px 0;
        color: var(--muted);
    }

    .article-body ul,
    .article-body ol {
        padding-left: 24px;
    }

    .article-body ul li,
    .article-body ol li {
        margin-bottom: 0.8em;
    }

    .article-body table {
        width: 100%;
        border-collapse: collapse;
        font-size: 14px;
        margin: 2em 0;
        border: 1px solid var(--line);
    }

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

    .article-bottom {
        max-width: 720px;
        margin: 34px auto 0;
        border-top: 1px solid var(--line);
        padding-top: 24px;
    }

    .article-share-row {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
    }

    .share-tag-row {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 8px;
    }

    .tag-link {
        display: inline-block;
        border: 1px solid #E2E5E8;
        background: #FBFCFD;
        border-radius: 6px;
        padding: 4px 12px;
        font-size: 12px;
        color: #5A6572;
        transition: border-color .2s ease, color .2s ease;
    }

    .tag-link:hover {
        color: var(--brand-dark);
        border-color: var(--brand);
    }

    .action-btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: transparent;
        border: 1px solid #E2E5E8;
        border-radius: 6px;
        color: var(--muted);
        min-height: 36px;
        padding: 0 14px;
        font-size: 13px;
        transition: color .25s ease, border-color .25s ease, background .25s ease;
    }

    .action-btn:hover {
        color: var(--brand-dark);
        border-color: var(--brand);
        background: #F8FDFC;
    }

    .action-btn.copied {
        color: var(--brand-dark);
        border-color: var(--brand);
        background: #EDFBF8;
    }

    .action-btn svg {
        width: 15px;
        height: 15px;
    }

    .article-declaration {
        max-width: 720px;
        margin: 26px auto 0;
        padding: 18px 20px;
        background: #FBFCFD;
        border: 1px solid #EDEFF1;
        border-radius: 8px;
        color: #6B7280;
        font-size: 13px;
        line-height: 1.85;
    }

    .article-more-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        max-width: 860px;
        margin: 34px auto 0;
    }

    .article-more-card {
        display: flex;
        align-items: stretch;
        justify-content: space-between;
        gap: 14px;
        background: var(--card);
        border: 1px solid var(--line);
        border-radius: 10px;
        padding: 12px 14px 12px 12px;
        transition: border-color .25s ease, transform .25s ease;
    }

    .article-more-card:hover {
        border-color: #BFDCD7;
        transform: translateY(-2px);
    }

    .article-more-card img {
        width: 120px;
        height: 78px;
        object-fit: cover;
        border-radius: 6px;
        flex: 0 0 120px;
        display: block;
        color: transparent;
    }

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

    .more-info strong {
        display: block;
        font-size: 15px;
        font-weight: 600;
        color: var(--ink);
        line-height: 1.5;
        margin-bottom: 6px;
    }

    .more-info span {
        display: inline-flex;
        font-size: 12px;
        color: var(--brand-dark);
    }

    .back-link-group {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 12px 24px;
        max-width: 860px;
        margin: 36px auto 0;
        padding-top: 20px;
        border-top: 1px solid var(--line);
        font-size: 14px;
    }

    .back-link-group a {
        color: var(--brand-dark);
        transition: color .2s ease;
    }

    .back-link-group a:hover {
        color: var(--brand);
    }

    .notfound-box {
        background: var(--card);
        border: 1px solid var(--line);
        border-radius: 14px;
        padding: 88px 24px;
        text-align: center;
        box-shadow: var(--shadow);
    }

    .notfound-box h1 {
        font-size: 30px;
        margin: 0 0 18px;
        color: var(--ink);
    }

    .notfound-box a {
        display: inline-block;
        min-height: 40px;
        line-height: 38px;
        padding: 0 24px;
        border: 1px solid var(--brand);
        color: var(--brand-dark);
        border-radius: 6px;
        font-size: 14px;
        transition: background .25s ease, color .25s ease;
    }

    .notfound-box a:hover {
        background: var(--brand);
        color: #fff;
    }

    .footer {
        background: var(--panel);
        color: rgba(255, 255, 255, 0.6);
        padding-top: 76px;
    }

    .footer a {
        transition: color .22s ease;
    }

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

    .footer-top {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.3fr;
        gap: 32px 44px;
        padding-bottom: 54px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-logo {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 15px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 14px;
    }

    .footer-top p,
    .footer-bottom {
        font-size: 13px;
        line-height: 1.8;
    }

    .footer h4 {
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        margin: 0 0 14px;
    }

    .footer-links {
        list-style: none;
        margin: 0;
        padding: 0;
    }

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

    .footer-links a {
        font-size: 13px;
        color: rgba(255, 255, 255, 0.55);
    }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 10px;
        padding: 28px 0 36px;
    }

    .scroll-top {
        position: fixed;
        right: 22px;
        bottom: 76px;
        z-index: 39;
        width: 72px;
        height: 34px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        background: rgba(255, 255, 255, 0.92);
        border: 1px solid var(--line);
        border-radius: 6px;
        font-size: 12px;
        color: var(--muted);
        box-shadow: 0 4px 18px rgba(15, 23, 42, 0.08);
        opacity: 0;
        transform: translateY(8px);
        pointer-events: none;
        transition: opacity .25s ease, transform .25s ease;
    }

    .scroll-top.show {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .scroll-top:hover {
        color: var(--brand-dark);
        border-color: var(--brand);
    }

    @media (max-width: 980px) {
        .nav-links {
            gap: 20px;
        }
        .nav-link {
            font-size: 13px;
        }
        .footer-top {
            grid-template-columns: 1fr 1fr;
            gap: 36px;
        }
    }

    @media (max-width: 820px) {
        .article-container {
            padding-top: 36px;
            padding-bottom: 64px;
        }
        .article-title {
            font-size: 30px;
        }
    }

    @media (max-width: 768px) {
        .nav-inner {
            padding: 0 16px;
            gap: 10px;
        }
        .nav-links,
        .nav-cta {
            display: none;
        }
        .nav-burger {
            display: inline-flex;
        }
        .article-title {
            font-size: 28px;
        }
        .article-more-grid {
            grid-template-columns: 1fr;
            gap: 12px;
        }
        .footer-top {
            grid-template-columns: 1fr;
            gap: 30px;
        }
        .article-card {
            padding: 28px 22px;
        }
    }

    @media (max-width: 520px) {
        .article-title {
            font-size: 24px;
        }
        .container {
            padding: 0 16px;
        }
        .article-container {
            padding-top: 28px;
        }
        .article-meta-row {
            gap: 10px 20px;
        }
        .article-summary {
            font-size: 15px;
        }
        .article-share-row {
            flex-direction: column;
            align-items: flex-start;
        }
        .article-more-card img {
            width: 100px;
            height: 78px;
            flex-basis: 100px;
        }
        .footer-bottom {
            flex-direction: column;
        }
    }

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

/* roulang page: category2 */
:root{
  --primary:#0d9488;
  --primary-dark:#0f766e;
  --accent:#f59e0b;
  --ink:#12181f;
  --gray:#4b5563;
  --line:#e5e7eb;
  --bg:#f7f8fa;
  --white:#ffffff;
  --night:#0f172a;
  --soft:rgba(13,148,136,.08);
  --radius:10px;
  --shadow:0 18px 48px rgba(15,23,42,.06);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.85;-webkit-font-smoothing:antialiased}
img,a,button,input{display:inline-block}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}
ul{margin:0;padding:0;list-style:none}
.container{width:min(1120px,90%);margin-inline:auto}
section{position:relative}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 22px;border-radius:8px;border:1px solid transparent;font-size:14px;font-weight:600;letter-spacing:.02em;transition:all .25s ease;cursor:pointer;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 10px 22px rgba(13,148,136,.18)}
.btn-secondary{background:var(--white);border-color:var(--line);color:var(--ink)}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}
.btn-dark-line{background:transparent;border-color:rgba(255,255,255,.28);color:#f8fafc}
.btn-dark-line:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.72);color:#fff}

/* 导航 */
.site-nav{position:sticky;top:0;z-index:60;height:70px;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(15,23,42,.08)}
.nav-inner{width:min(1180px,92%);margin-inline:auto;height:70px;display:flex;align-items:center;gap:24px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;letter-spacing:.02em;color:var(--ink)}
.logo-mark{position:relative;width:28px;height:28px;border-radius:9px;border:2px solid var(--primary);flex:0 0 auto}
.logo-mark::before{content:"";position:absolute;inset:6px;border-radius:3px;background:var(--primary);transform:rotate(45deg)}
.nav-links{margin-left:18px;display:flex;align-items:center;gap:28px}
.nav-link{position:relative;padding:7px 2px;font-size:14px;font-weight:500;color:var(--gray);transition:color .25s ease}
.nav-link::after{content:"";position:absolute;left:2px;right:2px;bottom:0;height:2px;border-radius:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.nav-cta{margin-left:auto;height:36px;padding:0 18px;background:var(--primary);color:#fff;border-radius:7px;font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;transition:background .3s ease,box-shadow .3s ease}
.nav-cta:hover{background:var(--primary-dark);box-shadow:0 8px 20px rgba(13,148,136,.24)}
.nav-burger{display:none;margin-left:auto;width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:8px;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;transition:border-color .3s ease}
.nav-burger:hover{border-color:var(--primary)}
.burger-line{width:16px;height:1px;background:var(--ink);transition:transform .3s ease}
.nav-burger.open .burger-line:first-child{transform:translateY(3px) rotate(45deg)}
.nav-burger.open .burger-line:last-child{transform:translateY(-3px) rotate(-45deg)}

/* 移动导航抽屉 */
.mobile-menu{position:fixed;inset:70px 0 0 0;z-index:55;background:#fff;display:flex;flex-direction:column;padding:38px 28px;transform:translateX(100%);transition:transform .32s ease;visibility:hidden}
.mobile-menu.open{transform:none;visibility:visible}
.mobile-menu-links{display:flex;flex-direction:column;gap:4px}
.mobile-link{padding:14px 4px;font-size:17px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line);transition:color .3s,padding-left .3s}
.mobile-link:hover{color:var(--primary);padding-left:10px}
.mobile-menu-cta{margin-top:26px;justify-content:center}

/* 栏目标题 */
.cat-masthead{background:#fff;border-bottom:1px solid var(--line);overflow:hidden}
.cat-masthead .cat-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:center;padding:62px 0 58px}
.mast-kicker{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:600;color:var(--primary);letter-spacing:.06em;margin-bottom:18px;text-transform:uppercase}
.mast-kicker::before{content:"";width:26px;height:1px;background:var(--primary)}
.h1-title{font-size:40px;line-height:1.25;letter-spacing:.02em;font-weight:800;margin:0}
.h1-title span{display:block;margin-top:10px;color:var(--primary);font-size:30px;font-weight:650;letter-spacing:.04em}
.mast-lead{margin:22px 0 30px;color:var(--gray);font-size:16px;max-width:620px}
.mast-actions{display:flex;flex-wrap:wrap;gap:12px}
.mast-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px}
.tag{display:inline-flex;align-items:center;padding:4px 11px;border:1px solid var(--line);border-radius:999px;background:#fafafa;color:var(--gray);font-size:12px;font-weight:500;letter-spacing:.02em;transition:border-color .25s,color .25s}
.tag:hover{border-color:var(--primary);color:var(--primary)}
.mast-deco{position:relative;border-radius:14px;overflow:hidden;height:210px;box-shadow:var(--shadow)}
.mast-deco img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.mast-deco::after{content:"";position:absolute;inset:0;border:1px solid rgba(255,255,255,.16);border-radius:14px;pointer-events:none}
.mast-deco:hover img{transform:scale(1.03)}

/* 问题目录 */
.index-section{padding:68px 0 34px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:30px}
.section-head h2{font-size:25px;font-weight:750;margin:0;letter-spacing:.01em}
.section-head p{font-size:14px;color:var(--gray);margin:0;max-width:520px;line-height:1.7}
.index-panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:0 8px}
.faq-index-row{display:grid;grid-template-columns:64px minmax(0,1fr) auto 26px;align-items:center;gap:12px;padding:17px 18px;border-bottom:1px solid #f1f3f5;transition:background .25s ease}
.faq-index-row:last-child{border-bottom:0}
.faq-index-row:hover{background:var(--soft)}
.faq-index-num{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;color:var(--gray);font-variant-numeric:tabular-nums;transition:color .25s ease}
.faq-index-row:hover .faq-index-num{color:var(--primary)}
.faq-index-name{font-size:16px;font-weight:600;color:var(--ink)}
.faq-index-count{font-size:12px;color:var(--gray);background:#f7f7f8;border:1px solid var(--line);padding:3px 10px;border-radius:999px;font-variant-numeric:tabular-nums}
.faq-index-arrow{color:#c7cbd0;transition:color .25s ease,transform .25s ease}
.faq-index-row:hover .faq-index-arrow{color:var(--primary);transform:translateX(4px)}

/* FAQ 分组 */
.faq-section{padding:40px 0 70px}
.faq-group{max-width:840px;margin-inline:auto;margin-top:34px}
.faq-group-head{display:flex;align-items:flex-start;gap:18px;border-bottom:1px solid var(--line);padding:16px 2px 18px;margin-bottom:18px}
.faq-group-num{flex:0 0 auto;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;color:var(--primary);font-variant-numeric:tabular-nums;padding-top:7px}
.faq-group-head-content{flex:1}
.faq-group-head-content h2{font-size:22px;font-weight:700;margin:0 0 3px}
.faq-group-head-content p{margin:0;font-size:14px;color:var(--gray);line-height:1.7}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;transition:border-color .3s ease,box-shadow .3s ease}
.faq-item:hover{border-color:#cfd6d5}
.faq-item[open]{border-color:rgba(13,148,136,.45);box-shadow:0 12px 34px rgba(15,23,42,.06)}
.faq-item summary{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px 24px;cursor:pointer;user-select:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-q{font-size:16px;font-weight:650;color:var(--ink);line-height:1.55}
.faq-icon{position:relative;flex:0 0 26px;width:26px;height:26px;border:1px solid rgba(13,148,136,.36);border-radius:50%;transition:transform .3s ease,background .3s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;top:50%;left:50%;background:var(--primary);transform:translate(-50%,-50%);transition:background .3s ease}
.faq-icon::before{width:11px;height:1px}
.faq-icon::after{width:1px;height:11px}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--soft)}
.faq-answer{padding:0 24px 20px;color:var(--gray);font-size:15px;line-height:1.9;animation:fadeDown .3s ease}
.faq-answer p{margin:0 0 12px}
.faq-answer p:last-child{margin-bottom:0}
.faq-more{color:var(--primary);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;margin-top:6px;transition:gap .25s ease}
.faq-more:hover{gap:11px}
@keyframes fadeDown{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}

/* 底部 CTA */
.help-cta{margin:18px auto 82px}
.help-cta-inner{background:var(--night);border-radius:22px;padding:56px 40px;text-align:center;position:relative;overflow:hidden}
.help-cta-inner::before{content:"";position:absolute;width:280px;height:280px;border-radius:50%;background:rgba(13,148,136,.22);filter:blur(90px);top:-100px;right:-70px;pointer-events:none}
.help-cta h2{font-size:27px;line-height:1.4;color:#fff;margin:0 0 12px}
.help-cta p{color:rgba(255,255,255,.62);font-size:15px;max-width:620px;margin:0 auto 28px}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;position:relative;z-index:2}
.cta-actions .btn-dark-line{margin-left:0}

/* 页脚 */
.footer{background:var(--night);color:rgba(255,255,255,.64);padding:56px 0 24px;margin-top:16px}
.footer-top{display:grid;grid-template-columns:1.65fr 1fr 1fr 1.4fr;gap:42px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;letter-spacing:.02em}
.mini-mark{width:24px;height:24px;border-radius:7px;border:2px solid var(--primary);position:relative}
.mini-mark::before{content:"";position:absolute;inset:5px;background:var(--primary);border-radius:2px;transform:rotate(45deg)}
.footer-top p{font-size:13px;line-height:1.85;margin:16px 0 0;max-width:320px}
.footer-top h4{font-size:14px;color:#fff;font-weight:600;margin:4px 0 14px;letter-spacing:.02em}
.footer-links li+li{margin-top:10px}
.footer-links a{font-size:13px;color:rgba(255,255,255,.62);line-height:1.6;transition:color .25s ease,padding-left .25s ease}
.footer-links a:hover{color:var(--primary);padding-left:4px}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:24px;font-size:12px;color:rgba(255,255,255,.45)}

/* 响应式 */
@media (max-width:1024px){
  .cat-masthead .cat-grid{grid-template-columns:1fr;gap:30px}
  .mast-deco{height:190px;max-width:480px}
  .index-section{padding:54px 0 24px}
  .faq-section{padding:28px 0 54px}
  .footer-top{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:760px){
  .nav-links .nav-link{display:none}
  .nav-cta{display:none}
  .nav-burger{display:flex}
  .container{width:94%}
  .h1-title{font-size:32px;letter-spacing:0}
  .h1-title span{font-size:24px}
  .mast-lead{font-size:15px}
  .cat-masthead .cat-grid{padding:44px 0 40px}
  .section-head{flex-direction:column;gap:8px}
  .section-head p{max-width:100%}
  .faq-index-row{grid-template-columns:38px minmax(0,1fr) auto;gap:10px;padding:14px 4px}
  .faq-index-arrow{display:none}
  .faq-item summary{flex-direction:row;padding:16px 18px}
  .faq-q{font-size:15px}
  .faq-answer{padding:0 18px 18px}
  .help-cta{margin:6px auto 40px}
  .help-cta-inner{padding:40px 20px}
  .help-cta h2{font-size:21px}
  .footer-top{grid-template-columns:1fr;gap:28px}
  .footer{background:var(--night)}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .faq-index-count{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}