/* roulang page: index */
:root {
  --deep-blue: #0A1E2E;
  --neon-cyan: #00D9BE;
  --mist-blue: #F2F7FC;
  --pure-white: #FFFFFF;
  --ink-blue: #16303F;
  --steel-blue: #4D6878;
  --light-mist: #DCE7EE;
  --dark-blue: #0E2A3A;
  --radius-card: 14px;
  --radius-btn: 10px;
  --shadow-card: 0 4px 20px rgba(10,30,46,.06);
  --shadow-hover: 0 10px 30px rgba(10,30,46,.12);
  --shadow-nav: 0 4px 20px rgba(10,30,46,.3);
  --glow: 0 0 16px rgba(0,217,190,.35);
  --transition: all .25s ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--mist-blue);
  color: var(--ink-blue);
  line-height: 1.75;
  font-size: 1rem;
  margin: 0;
  padding: 0;
}

img { max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
button:focus, a:focus, input:focus, textarea:focus { outline: none; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid rgba(0,217,190,.55);
  outline-offset: 3px;
}

.container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
.section-pad { padding: clamp(4rem, 8vw, 6.5rem) 0; }
.bg-mist { background: var(--mist-blue); }
.bg-white { background: var(--pure-white); }
.section-title-wrap { max-width: 720px; margin-bottom: 28px; }
.section-title-wrap .overline {
  width: 42px; height: 4px; background: var(--neon-cyan); border-radius: 999px;
  display: inline-block; margin-bottom: 14px;
}
.section-title-wrap .section-title {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink-blue);
  margin: 0 0 10px 0;
  letter-spacing: .01em;
}
.section-title-wrap .section-desc {
  font-size: .98rem;
  color: var(--steel-blue);
  margin: 0;
  line-height: 1.8;
}

/* 导航 */
.top-neon-line {
  height: 3px;
  background: var(--neon-cyan);
  position: relative;
  z-index: 1200;
  box-shadow: var(--glow);
}
.navbar {
  background: var(--deep-blue);
  min-height: 72px;
  padding: 0;
  transition: var(--transition);
  z-index: 1100;
}
.navbar.scrolled {
  box-shadow: var(--shadow-nav);
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  white-space: nowrap;
}
.navbar-brand:hover { color: var(--neon-cyan); }
.brand-mark {
  width: 34px; height: 34px;
  background: var(--neon-cyan);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--deep-blue);
  font-size: 1.1rem;
  box-shadow: var(--glow);
  flex-shrink: 0;
}
.navbar-nav { align-items: center; gap: 4px; }
.navbar-nav .nav-link {
  color: rgba(255,255,255,.82);
  font-size: .96rem;
  font-weight: 500;
  padding: 8px 16px !important;
  position: relative;
  letter-spacing: .02em;
  transition: var(--transition);
}
.navbar-nav .nav-link:hover { color: #fff; }
.navbar-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 2px;
  height: 2px;
  background: var(--neon-cyan);
  border-radius: 999px;
  transform: scaleX(0);
  transition: transform .3s ease;
}
.navbar-nav .nav-link:hover::after { transform: scaleX(1); }
.navbar-nav .nav-link.active {
  color: #fff;
  font-weight: 600;
}
.navbar-nav .nav-link.active::after {
  transform: scaleX(1);
  box-shadow: var(--glow);
}
.nav-cta .btn-neon {
  background: var(--neon-cyan);
  color: var(--deep-blue);
  font-weight: 600;
  font-size: .92rem;
  border-radius: var(--radius-btn);
  padding: 8px 20px;
  border: 1px solid var(--neon-cyan);
  transition: var(--transition);
}
.nav-cta .btn-neon:hover {
  background: #00E8D0;
  box-shadow: var(--glow);
  color: var(--deep-blue);
  transform: translateY(-1px);
}
.navbar-toggler {
  border-color: rgba(255,255,255,.35);
  color: #fff;
  padding: 6px 12px;
  border-radius: 8px;
}
.navbar-toggler:hover { border-color: var(--neon-cyan); }
.navbar-toggler i { color: rgba(255,255,255,.85); font-size: 1.3rem; }
@media (max-width: 991.98px) {
  .navbar-collapse {
    background: var(--deep-blue);
    padding: 18px 20px 24px;
    border-radius: 14px;
    margin-top: 12px;
    border: 1px solid rgba(255,255,255,.08);
    box-shadow: var(--shadow-nav);
  }
  .navbar-nav { width: 100%; gap: 0; align-items: flex-start; }
  .navbar-nav .nav-link { width: 100%; padding: 14px 8px !important; border-bottom: 1px solid rgba(255,255,255,.06); }
  .navbar-nav .nav-link::after { display: none; }
  .nav-cta { width: 100%; margin-top: 14px; }
  .nav-cta .btn-neon { width: 100%; text-align: center; display: block; }
}

/* Hero */
.hero-section {
  background: linear-gradient(135deg, #F2F7FC 0%, #fff 45%, #E4F0F8 100%);
  padding: clamp(5rem, 9vw, 7.5rem) 0 4rem;
  position: relative;
  overflow: hidden;
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .25;
  pointer-events: none;
}
.hero-orb-1 { width: 380px; height: 380px; background: var(--neon-cyan); top: -120px; right: -80px; }
.hero-orb-2 { width: 300px; height: 300px; background: #8ab4e8; bottom: -100px; left: -60px; opacity: .14; }
.hero-content { position: relative; z-index: 2; }
.hero-badge-tip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,217,190,.1);
  color: var(--deep-blue);
  border: 1px solid rgba(0,217,190,.28);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-badge-tip i { color: var(--neon-cyan); font-size: .9rem; }
.hero-title {
  font-size: clamp(2.2rem, 4.8vw, 3.5rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--ink-blue);
  margin: 0 0 16px;
  letter-spacing: .01em;
}
.hero-title .highlight {
  color: var(--deep-blue);
  position: relative;
  white-space: nowrap;
}
.hero-title .highlight::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 2px;
  height: 10px;
  background: rgba(0,217,190,.35);
  border-radius: 4px;
  z-index: -1;
}
.hero-sub {
  font-size: 1.08rem;
  color: var(--steel-blue);
  max-width: 520px;
  margin: 0 0 30px;
  line-height: 1.85;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 30px; }
.btn-neon-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--neon-cyan);
  color: var(--deep-blue);
  font-weight: 600;
  font-size: .98rem;
  border-radius: var(--radius-btn);
  padding: 12px 28px;
  border: 1px solid var(--neon-cyan);
  min-height: 44px;
  transition: var(--transition);
}
.btn-neon-primary:hover {
  background: #00E8D0;
  box-shadow: var(--glow);
  transform: translateY(-2px);
  color: var(--deep-blue);
}
.btn-outline-dark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--deep-blue);
  font-weight: 600;
  font-size: .98rem;
  border-radius: var(--radius-btn);
  padding: 12px 28px;
  border: 1.5px solid var(--deep-blue);
  min-height: 44px;
  transition: var(--transition);
}
.btn-outline-dark:hover {
  background: rgba(10,30,46,.05);
  border-color: var(--neon-cyan);
  color: var(--deep-blue);
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
}
.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .9rem;
  color: var(--steel-blue);
  font-weight: 500;
}
.hero-trust i { color: var(--neon-cyan); font-size: .9rem; }
.hero-visual { position: relative; z-index: 2; }
.hero-img-wrap {
  border-radius: 20px;
  overflow: hidden;
  border: 6px solid #fff;
  box-shadow: 0 20px 50px rgba(10,30,46,.15);
  position: relative;
}
.hero-img-wrap img { width: 100%; height: 440px; object-fit: cover; display: block; }
.hero-float-card {
  position: absolute;
  left: -20px;
  bottom: 28px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 20px 40px rgba(10,30,46,.12);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 200px;
}
.hero-float-card .fc-num {
  font-family: "Inter", "DIN Alternate", "PingFang SC", sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--neon-cyan);
  line-height: 1.1;
}
.hero-float-card .fc-label { font-size: .82rem; color: var(--steel-blue); line-height: 1.4; }
@media (max-width: 991.98px) {
  .hero-section { padding: 4rem 0 3rem; }
  .hero-visual { margin-top: 42px; }
  .hero-img-wrap img { height: 300px; }
  .hero-float-card { left: 12px; bottom: 16px; }
}
@media (max-width: 575.98px) {
  .hero-actions .btn-neon-primary, .hero-actions .btn-outline-dark { width: 100%; justify-content: center; }
}

/* 资讯动态 */
.news-section { background: var(--mist-blue); }
.news-card {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  height: 100%;
  transition: var(--transition);
  border: none;
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.news-card .news-thumb { position: relative; overflow: hidden; aspect-ratio: 16/9; }
.news-card .news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.news-card:hover .news-thumb img { transform: scale(1.04); }
.news-card .news-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.news-card .news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: .8rem;
  color: var(--steel-blue);
}
.news-card .news-meta .badge-cat {
  background: rgba(0,217,190,.12);
  color: var(--deep-blue);
  border-radius: 999px;
  padding: 3px 12px;
  font-weight: 600;
  font-size: .78rem;
}
.news-card .news-title {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--ink-blue);
  line-height: 1.45;
  margin: 0 0 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card .news-excerpt {
  font-size: .9rem;
  color: var(--steel-blue);
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.news-card .news-link {
  font-size: .9rem;
  font-weight: 600;
  color: var(--deep-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}
.news-card .news-link:hover { color: var(--neon-cyan); gap: 8px; }
.news-empty {
  background: #fff;
  border: 1px dashed var(--light-mist);
  border-radius: var(--radius-card);
  padding: 44px 24px;
  text-align: center;
  color: var(--steel-blue);
  font-size: .96rem;
}
.news-viewall {
  color: var(--steel-blue);
  font-size: .92rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-viewall:hover { color: var(--neon-cyan); gap: 8px; }
@media (max-width: 767.98px) {
  .news-card .news-body { padding: 18px; }
}

/* 核心服务 */
.service-section { background: #fff; }
.service-card {
  background: #fff;
  border: 1px solid #f0f4f7;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  height: 100%;
  transition: var(--transition);
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--neon-cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.service-card .service-num {
  position: absolute;
  top: 22px; right: 22px;
  font-family: "Inter", "DIN Alternate", sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: #E1EBF1;
  transition: var(--transition);
  line-height: 1;
}
.service-card:hover .service-num { color: var(--neon-cyan); }
.service-card .service-icon {
  width: 52px; height: 52px;
  background: rgba(0,217,190,.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--deep-blue);
  font-size: 1.25rem;
  margin-bottom: 18px;
}
.service-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink-blue);
  margin: 0 0 8px;
}
.service-card p {
  font-size: .92rem;
  color: var(--steel-blue);
  line-height: 1.75;
  margin: 0;
}

/* 数据优势 */
.stats-section {
  background: var(--deep-blue);
  padding: clamp(3.5rem, 6vw, 5rem) 0;
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: "";
  position: absolute;
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(0,217,190,.15) 0%, transparent 70%);
  border-radius: 50%;
  top: -160px; right: -100px;
  pointer-events: none;
}
.stats-section::after {
  content: "";
  position: absolute;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(0,217,190,.1) 0%, transparent 70%);
  border-radius: 50%;
  bottom: -140px; left: -80px;
  pointer-events: none;
}
.stats-item { text-align: center; position: relative; z-index: 1; }
.stats-item .stats-num {
  font-family: "Inter", "DIN Alternate", "PingFang SC", sans-serif;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--neon-cyan);
  line-height: 1.2;
}
.stats-item .stats-label {
  color: rgba(255,255,255,.65);
  font-size: .92rem;
  margin-top: 6px;
  letter-spacing: .02em;
}
@media (max-width: 767.98px) {
  .stats-item { margin-bottom: 30px; }
  .stats-section .row > div:last-child .stats-item { margin-bottom: 0; }
}

/* 案例展示 */
.cases-section { background: var(--mist-blue); }
.case-large, .case-small {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  border: none;
  position: relative;
}
.case-large:hover, .case-small:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.case-media { position: relative; overflow: hidden; }
.case-media img { width: 100%; height: 220px; object-fit: cover; transition: transform .5s ease; }
.case-large:hover .case-media img, .case-small:hover .case-media img { transform: scale(1.02); }
.case-tag {
  position: absolute;
  top: 14px; left: 14px;
  background: var(--neon-cyan);
  color: var(--deep-blue);
  font-size: .78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  box-shadow: 0 2px 12px rgba(0,217,190,.4);
  z-index: 2;
}
.case-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-size: 1.2rem; font-weight: 600; color: var(--ink-blue); margin-bottom: 10px; }
.case-body p { font-size: .92rem; color: var(--steel-blue); line-height: 1.8; margin-bottom: 14px; flex: 1; }
.case-body .case-result {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.case-result .result-item .num {
  font-family: "Inter", "DIN Alternate", sans-serif;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--neon-cyan);
  line-height: 1.2;
}
.case-result .result-item .txt { font-size: .8rem; color: var(--steel-blue); }
@media (max-width: 991.98px) {
  .case-media img { height: 260px; }
}
@media (max-width: 767.98px) {
  .case-media img { height: 200px; }
}

/* 解决方案 */
.solution-section { background: #fff; }
.solution-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
}
.solution-row + .solution-row { margin-top: clamp(3rem, 6vw, 4.5rem); }
.solution-media { position: relative; overflow: hidden; border-radius: 20px; box-shadow: var(--shadow-card); }
.solution-media img { width: 100%; height: auto; min-height: 280px; object-fit: cover; display: block; transition: transform .5s ease; }
.solution-row:hover .solution-media img { transform: scale(1.02); }
.solution-content .sol-tag {
  display: inline-block;
  background: rgba(0,217,190,.1);
  color: var(--deep-blue);
  font-size: .8rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 14px;
  border: 1px solid rgba(0,217,190,.25);
}
.solution-content h3 { font-size: clamp(1.3rem, 2vw, 1.7rem); font-weight: 700; color: var(--ink-blue); margin-bottom: 12px; }
.solution-content > p { color: var(--steel-blue); font-size: .96rem; line-height: 1.8; margin-bottom: 18px; }
.solution-list { list-style: none; padding: 0; margin: 0 0 24px; }
.solution-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--ink-blue);
  font-size: .95rem;
  line-height: 1.7;
  margin-bottom: 10px;
}
.solution-list li::before {
  content: "";
  flex-shrink: 0;
  width: 8px; height: 8px;
  background: var(--neon-cyan);
  border-radius: 2px;
  margin-top: 9px;
}
@media (max-width: 991.98px) {
  .solution-row.reverse .solution-media { order: 1; }
  .solution-row.reverse .solution-content { order: 2; margin-top: 24px; }
  .solution-row:not(.reverse) .solution-media { margin-bottom: 24px; }
}

/* FAQ */
.faq-section { background: var(--mist-blue); }
.faq-accordion .accordion-item {
  background: #fff;
  border: none;
  border-radius: var(--radius-card) !important;
  box-shadow: var(--shadow-card);
  margin-bottom: 16px;
  overflow: hidden;
}
.faq-accordion .accordion-button {
  background: #fff;
  color: var(--ink-blue);
  font-size: 1rem;
  font-weight: 600;
  padding: 20px 24px;
  box-shadow: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
  position: relative;
}
.faq-accordion .accordion-button:not(.collapsed) {
  background: #fff;
  color: var(--ink-blue);
  box-shadow: none;
  border-bottom-color: var(--light-mist);
}
.faq-accordion .accordion-button:hover { background: #F7FAFC; }
.faq-accordion .accordion-button:focus { box-shadow: none; }
.faq-accordion .accordion-button::after {
  content: "\f067";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  background: none;
  width: auto;
  height: auto;
  color: var(--steel-blue);
  font-size: 1rem;
  transition: transform .3s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after {
  transform: rotate(45deg);
  color: var(--neon-cyan);
}
.faq-accordion .accordion-body {
  padding: 4px 24px 20px;
  color: var(--steel-blue);
  font-size: .94rem;
  line-height: 1.85;
  background: #fff;
}

/* CTA 联系 */
.contact-section { background: var(--mist-blue); padding: clamp(4rem, 8vw, 6rem) 0; }
.contact-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid #f0f4f7;
}
.contact-form .form-label {
  font-size: .9rem;
  font-weight: 500;
  color: var(--ink-blue);
  margin-bottom: 8px;
}
.contact-form .form-control {
  background: #fff;
  border: 1px solid var(--light-mist);
  border-radius: var(--radius-btn);
  padding: 12px 14px;
  font-size: .94rem;
  color: var(--ink-blue);
  transition: var(--transition);
}
.contact-form .form-control:focus {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 0 4px rgba(0,217,190,.12);
}
.contact-form .form-control::placeholder { color: #9FB3BF; font-size: .9rem; }
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}
.contact-info-item .ci-icon {
  width: 42px; height: 42px;
  background: rgba(0,217,190,.1);
  color: var(--deep-blue);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-info-item .ci-label { font-size: .82rem; color: var(--steel-blue); margin-bottom: 2px; }
.contact-info-item .ci-value { font-size: .95rem; font-weight: 500; color: var(--ink-blue); line-height: 1.5; }
.form-privacy { font-size: .8rem; color: #9FB3BF; margin-top: 10px; }
@media (max-width: 767.98px) {
  .contact-card { padding: 24px; }
  .contact-info-col { margin-top: 32px; }
}

/* 页脚 */
.footer {
  background: var(--deep-blue);
  padding: clamp(3rem, 6vw, 4.5rem) 0 0;
  position: relative;
}
.footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--neon-cyan);
  box-shadow: var(--glow);
}
.footer h5 {
  color: #fff;
  font-size: .95rem;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: .02em;
}
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .brand-mark { font-size: 1rem; width: 30px; height: 30px; }
.footer-brand span { color: #fff; font-size: 1.1rem; font-weight: 700; }
.footer-desc { color: rgba(255,255,255,.65); font-size: .9rem; line-height: 1.8; margin-bottom: 18px; max-width: 300px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.7);
  font-size: .95rem;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--neon-cyan); color: var(--deep-blue); border-color: var(--neon-cyan); box-shadow: var(--glow); }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: rgba(255,255,255,.65); font-size: .9rem; transition: var(--transition); }
.footer-links a:hover { color: var(--neon-cyan); padding-left: 4px; }
.footer-contact-list { list-style: none; padding: 0; margin: 0; }
.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: rgba(255,255,255,.65);
  font-size: .9rem;
  margin-bottom: 12px;
  line-height: 1.6;
}
.footer-contact-list i { color: var(--neon-cyan); margin-top: 4px; font-size: .9rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  margin-top: clamp(2rem, 4vw, 3rem);
  text-align: center;
  color: rgba(255,255,255,.4);
  font-size: .85rem;
}
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: var(--neon-cyan); }
@media (max-width: 767.98px) {
  .footer .col-lg-3 { margin-bottom: 28px; }
}
@media (max-width: 575.98px) {
  .footer .col-6 { flex: 0 0 50%; max-width: 50%; }
}

/* roulang page: article */
:root {
    --deep-sea: #0A1E2E;
    --deep-sea-2: #0E2A3A;
    --neon: #00D9BE;
    --neon-bright: #00E8D0;
    --cloud: #F2F7FC;
    --white: #FFFFFF;
    --ink: #16303F;
    --steel: #4D6878;
    --line: #DCE7EE;
    --card-shadow: 0 4px 20px rgba(10, 30, 46, .06);
    --card-shadow-hover: 0 10px 30px rgba(10, 30, 46, .12);
    --neon-glow: 0 0 16px rgba(0, 217, 190, .35);
    --radius: 14px;
    --radius-sm: 10px;
    --transition: all .25s ease;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--cloud);
    color: var(--ink);
    line-height: 1.75;
}
img { max-width: 100%; height: auto; }
a { text-decoration: none; transition: var(--transition); }
.container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }

/* 导航 */
#mainNav {
    background: var(--deep-sea);
    min-height: 72px;
    box-shadow: 0 4px 20px rgba(10,30,46,.3);
    padding-top: 0;
    padding-bottom: 0;
    z-index: 1050;
}
#mainNav .navbar-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: .02em;
    transition: var(--transition);
    padding-top: 0;
    padding-bottom: 0;
}
#mainNav .navbar-brand:hover { color: var(--neon); }
.brand-mark {
    width: 34px;
    height: 34px;
    background: var(--neon);
    color: var(--deep-sea);
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}
#mainNav .navbar-nav { align-items: center; gap: 4px; }
#mainNav .navbar-nav .nav-link {
    color: rgba(255,255,255,.78);
    font-weight: 500;
    padding: 24px 16px;
    position: relative;
    transition: var(--transition);
    letter-spacing: .02em;
}
#mainNav .navbar-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 8px;
    height: 2px;
    background: var(--neon);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .25s ease;
}
#mainNav .navbar-nav .nav-link:hover,
#mainNav .navbar-nav .nav-link.active {
    color: #fff;
}
#mainNav .navbar-nav .nav-link:hover::after,
#mainNav .navbar-nav .nav-link.active::after {
    transform: scaleX(1);
}
#mainNav .navbar-nav .nav-link.active {
    text-shadow: 0 0 12px rgba(0,217,190,.35);
}
.nav-cta { margin-left: 12px; }
.btn-neon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 24px;
    background: var(--neon);
    color: var(--deep-sea);
    border-radius: 10px;
    font-weight: 600;
    font-size: .92rem;
    border: none;
    transition: var(--transition);
    cursor: pointer;
}
.btn-neon:hover {
    background: var(--neon-bright);
    color: var(--deep-sea);
    box-shadow: var(--neon-glow);
    transform: translateY(-2px);
}
.navbar-toggler {
    border: none;
    color: #fff;
    font-size: 1.5rem;
    padding: 6px 10px;
}
.navbar-toggler:focus { box-shadow: none; }
@media (max-width: 991.98px) {
    #mainNav .navbar-collapse {
        background: var(--deep-sea);
        padding: 16px 0 24px;
        border-top: 1px solid rgba(255,255,255,.08);
        margin-top: 12px;
    }
    #mainNav .navbar-nav { align-items: stretch; gap: 0; }
    #mainNav .navbar-nav .nav-link {
        padding: 12px 16px;
        border-radius: 8px;
    }
    #mainNav .navbar-nav .nav-link::after { display: none; }
    .nav-cta { margin-left: 0; margin-top: 16px; }
    .nav-cta .btn-neon { width: 100%; }
}

/* 面包屑 */
.breadcrumb-wrap {
    background: var(--cloud);
    border-bottom: 1px solid var(--line);
    padding: 18px 0;
}
.breadcrumb-wrap .breadcrumb {
    margin: 0;
    font-size: .85rem;
}
.breadcrumb-wrap .breadcrumb-item a { color: var(--steel); }
.breadcrumb-wrap .breadcrumb-item a:hover { color: var(--neon); }
.breadcrumb-wrap .breadcrumb-item.active { color: var(--ink); }
.breadcrumb-item + .breadcrumb-item::before {
    content: "/";
    color: #9db2bf;
}

/* 文章主体 */
.article-page {
    padding: clamp(2rem, 4vw, 3rem) 0;
    background: var(--cloud);
}
.content-layout {
    display: flex;
    gap: 32px;
    align-items: flex-start;
}
.article-main {
    flex: 1;
    max-width: 820px;
    background: var(--white);
    border-radius: var(--radius);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    box-shadow: var(--card-shadow);
}
.article-side {
    width: 300px;
    flex-shrink: 0;
}
.article-cat-badge {
    display: inline-block;
    background: rgba(0,217,190,.12);
    color: #009e8c;
    font-size: .8rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 999px;
    margin-bottom: 14px;
}
.article-main h1.article-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    line-height: 1.4;
    color: var(--ink);
    margin: 0 0 16px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 28px;
    color: var(--steel);
    font-size: .85rem;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 12px 0;
    margin-bottom: 24px;
}
.article-meta span { display: inline-flex; align-items: center; gap: 6px; }
.article-meta i { color: var(--neon); }

.article-content {
    font-size: 1rem;
    color: #38505f;
}
.article-content p {
    margin-bottom: 20px;
    line-height: 1.85;
}
.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--ink);
    margin: 36px 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line);
}
.article-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--ink);
    margin: 28px 0 12px;
}
.article-content blockquote {
    background: var(--cloud);
    border-left: 4px solid var(--neon);
    border-radius: 8px;
    padding: 20px 24px;
    margin: 24px 0;
    color: var(--steel);
}
.article-content ul,
.article-content ol {
    padding-left: 1.5rem;
    margin-bottom: 20px;
}
.article-content ul li { list-style: none; position: relative; padding-left: 16px; margin-bottom: 8px; }
.article-content ul li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .55em;
    width: 6px;
    height: 6px;
    background: var(--neon);
    border-radius: 2px;
}
.article-content img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    margin: 20px 0;
}
.article-content a { color: #009e8c; border-bottom: 1px solid transparent; }
.article-content a:hover { border-bottom-color: var(--neon); }
.article-end-divider {
    border-top: 1px solid var(--line);
    margin: 36px 0 20px;
}
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.tag-item {
    background: var(--cloud);
    color: var(--steel);
    font-size: .8rem;
    padding: 6px 14px;
    border-radius: 999px;
    transition: var(--transition);
}
.tag-item:hover {
    background: rgba(0,217,190,.1);
    color: #009e8c;
}

.article-empty {
    text-align: center;
    padding: 60px 20px;
}
.article-empty .empty-icon {
    font-size: 3rem;
    color: rgba(0,217,190,.4);
    margin-bottom: 16px;
}
.article-empty h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 12px;
}
.article-empty p {
    color: var(--steel);
    margin-bottom: 24px;
}

/* 侧边栏 */
.side-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    padding: 22px;
    margin-bottom: 24px;
}
.side-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 16px;
    position: relative;
    padding-left: 12px;
}
.side-card h4::before {
    content: "";
    position: absolute;
    left: 0;
    top: 5px;
    bottom: 5px;
    width: 3px;
    background: var(--neon);
    border-radius: 3px;
}
.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.toc-list li { margin-bottom: 4px; }
.toc-list a {
    display: block;
    padding: 8px 10px;
    color: var(--steel);
    font-size: .88rem;
    border-radius: 6px;
    transition: var(--transition);
}
.toc-list a:hover {
    background: var(--cloud);
    color: #009e8c;
}
.side-post {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid #eef4f8;
    align-items: center;
}
.side-post:last-child { border-bottom: none; }
.side-post img {
    width: 68px;
    height: 52px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
    background: var(--cloud);
}
.side-post .side-post-info { min-width: 0; }
.side-post .side-post-title {
    font-size: .85rem;
    font-weight: 500;
    color: var(--ink);
    line-height: 1.4;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.side-post .side-post-title:hover { color: #009e8c; }
.side-post .side-post-date {
    font-size: .75rem;
    color: #8ba5b5;
}

/* 相关推荐 */
.related-section {
    padding: clamp(2.5rem, 5vw, 4rem) 0;
    background: var(--white);
}
.related-title {
    font-size: clamp(1.4rem, 2.4vw, 1.8rem);
    font-weight: 700;
    color: var(--ink);
    text-align: center;
    margin-bottom: 32px;
}
.related-section .related-title::after {
    content: "";
    display: block;
    width: 40px;
    height: 3px;
    background: var(--neon);
    border-radius: 3px;
    margin: 12px auto 0;
}
.related-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    height: 100%;
}
.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}
.related-card .related-img {
    display: block;
    height: 180px;
    overflow: hidden;
}
.related-card .related-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
}
.related-card:hover .related-img img { transform: scale(1.05); }
.related-card .related-body { padding: 20px; }
.related-card .related-body h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
    line-height: 1.4;
}
.related-card .related-body h3 a { color: inherit; }
.related-card .related-body h3 a:hover { color: #009e8c; }
.related-card .related-body p {
    font-size: .88rem;
    color: var(--steel);
    margin-bottom: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card .related-link {
    display: inline-block;
    color: #009e8c;
    font-weight: 500;
    margin-top: 12px;
    font-size: .88rem;
}
.related-card .related-link:hover { color: var(--neon); }

/* 页脚 */
.footer {
    background: var(--deep-sea);
    color: rgba(255,255,255,.65);
    border-top: 3px solid var(--neon);
    padding-top: 56px;
}
.footer .footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 16px;
}
.footer-desc {
    font-size: .9rem;
    line-height: 1.75;
    color: rgba(255,255,255,.6);
    margin-bottom: 16px;
}
.footer-social {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
}
.footer-social a {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255,255,255,.08);
    color: rgba(255,255,255,.7);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.footer-social a:hover {
    background: var(--neon);
    color: var(--deep-sea);
}
.footer h5 {
    color: #fff;
    font-size: .95rem;
    font-weight: 600;
    margin-bottom: 16px;
}
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
    color: rgba(255,255,255,.65);
    font-size: .9rem;
    transition: var(--transition);
}
.footer-links a:hover {
    color: var(--neon);
    padding-left: 4px;
}
.footer-contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-contact-list li {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    margin-bottom: 12px;
    font-size: .9rem;
    color: rgba(255,255,255,.65);
}
.footer-contact-list i {
    color: var(--neon);
    margin-top: 5px;
    width: 16px;
    flex-shrink: 0;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.08);
    padding: 20px 0;
    margin-top: 40px;
    font-size: .85rem;
    color: rgba(255,255,255,.45);
    text-align: center;
}
.footer-bottom a {
    color: rgba(255,255,255,.5);
}
.footer-bottom a:hover {
    color: var(--neon);
}
@media (max-width: 767.98px) {
    .container { padding-left: 16px; padding-right: 16px; }
    .content-layout { display: block; }
    .article-side { display: none; }
    .article-meta { gap: 10px 18px; font-size: .8rem; }
    .article-main { padding: 1.25rem; }
    .related-card { margin-bottom: 20px; }
    .footer { padding-top: 40px; }
    .footer [class*="col-"] { margin-bottom: 24px; }
}
@media (max-width: 575.98px) {
    .nav-cta .btn-neon { width: 100%; }
}

/* roulang page: category1 */
:root {
            --deep-sea: #0A1E2E;
            --midnight-blue: #0E2A3A;
            --neon-cyan: #00D9BE;
            --neon-bright: #00E8D0;
            --mist-blue: #F2F7FC;
            --pure-white: #FFFFFF;
            --ink-blue: #16303F;
            --steel-blue: #4D6878;
            --mist-line: #DCE7EE;
            --radius-card: 14px;
            --radius-hero: 20px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 20px rgba(10, 30, 46, .06);
            --shadow-hover: 0 10px 30px rgba(10, 30, 46, .12);
            --shadow-neon: 0 0 16px rgba(0, 217, 190, .35);
            --shadow-input: 0 0 0 4px rgba(0, 217, 190, .12);
            --transition: all .25s ease;
            --container-w: 1200px;
            --section-space: clamp(4rem, 8vw, 6.5rem);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--mist-blue);
            color: var(--ink-blue);
            line-height: 1.75;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--steel-blue);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--neon-cyan);
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            color: var(--ink-blue);
            line-height: 1.3;
            margin-top: 0;
        }

        p {
            margin-top: 0;
            margin-bottom: 1rem;
        }

        .container {
            max-width: var(--container-w);
            padding-left: 20px;
            padding-right: 20px;
        }

        .section {
            padding-top: var(--section-space);
            padding-bottom: var(--section-space);
        }

        .section-title-wrapper {
            margin-bottom: 2.5rem;
        }

        .section-title-wrapper .section-line {
            display: block;
            width: 48px;
            height: 3px;
            background: var(--neon-cyan);
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .section-title-wrapper .sub-label {
            display: inline-block;
            font-size: .8rem;
            font-weight: 600;
            letter-spacing: .04em;
            color: var(--neon-cyan);
            background: rgba(0, 217, 190, .1);
            border-radius: 999px;
            padding: 4px 14px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: clamp(1.5rem, 2.6vw, 2.1rem);
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: .01em;
        }

        .section-desc {
            color: var(--steel-blue);
            font-size: .95rem;
            max-width: 680px;
        }

        .btn-neon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--neon-cyan);
            color: var(--deep-sea) !important;
            border: none;
            font-weight: 600;
            font-size: .95rem;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            min-height: 44px;
            transition: var(--transition);
            box-shadow: 0 2px 10px rgba(0, 217, 190, .2);
            letter-spacing: .02em;
        }

        .btn-neon:hover {
            background: var(--neon-bright);
            box-shadow: var(--shadow-neon);
            transform: translateY(-2px);
            color: var(--deep-sea) !important;
        }

        .btn-neon:focus-visible,
        .btn-outline:focus-visible,
        .btn-white-outline:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 3px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--deep-sea) !important;
            border: 1.5px solid var(--deep-sea);
            font-weight: 600;
            font-size: .95rem;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            min-height: 44px;
            transition: var(--transition);
            letter-spacing: .02em;
        }

        .btn-outline:hover {
            background: rgba(10, 30, 46, .04);
            border-color: var(--neon-cyan);
            color: var(--neon-cyan) !important;
        }

        .btn-white-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: #fff !important;
            border: 1.5px solid rgba(255, 255, 255, .75);
            font-weight: 600;
            font-size: .95rem;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            min-height: 44px;
            transition: var(--transition);
            letter-spacing: .02em;
        }

        .btn-white-outline:hover {
            background: rgba(255, 255, 255, .1);
            border-color: var(--neon-cyan);
            color: var(--neon-cyan) !important;
        }

        .text-link {
            color: var(--steel-blue);
            text-decoration: underline;
            text-underline-offset: 4px;
            text-decoration-color: rgba(0, 217, 190, .4);
            font-weight: 500;
            transition: var(--transition);
        }

        .text-link:hover {
            color: var(--neon-cyan);
            text-decoration-color: var(--neon-cyan);
            text-decoration-thickness: 2px;
        }

        /* ===== 导航 ===== */
        #mainNav {
            background: var(--deep-sea) !important;
            min-height: 72px;
            padding-top: 0;
            padding-bottom: 0;
            box-shadow: 0 4px 20px rgba(10, 30, 46, .3);
            border-bottom: 2px solid rgba(0, 217, 190, .55);
            z-index: 1050;
        }

        #mainNav .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: .02em;
            padding-top: 0;
            padding-bottom: 0;
        }

        #mainNav .navbar-brand:hover {
            color: var(--neon-cyan);
        }

        #mainNav .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--neon-cyan);
            border-radius: 10px;
            color: var(--deep-sea);
            font-size: 1.2rem;
            box-shadow: 0 0 14px rgba(0, 217, 190, .4);
        }

        #mainNav .nav-link {
            color: rgba(255, 255, 255, .8) !important;
            font-weight: 500;
            font-size: .96rem;
            padding: 8px 14px !important;
            margin: 0 4px;
            letter-spacing: .02em;
            position: relative;
            transition: var(--transition);
            border-radius: 6px;
        }

        #mainNav .nav-link::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: center;
            transition: transform .25s ease;
        }

        #mainNav .nav-link:hover {
            color: rgba(255, 255, 255, 1) !important;
        }

        #mainNav .nav-link:hover::after {
            transform: scaleX(1);
        }

        #mainNav .nav-link.active {
            color: #fff !important;
            background: rgba(0, 217, 190, .08);
            box-shadow: 0 2px 10px rgba(0, 217, 190, .25);
        }

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

        #mainNav .nav-cta {
            display: inline-flex;
        }

        #mainNav .nav-cta .btn-neon {
            padding: 8px 20px;
            font-size: .9rem;
            min-height: 40px;
        }

        #mainNav .navbar-toggler {
            border: none;
            color: var(--neon-cyan);
            font-size: 1.5rem;
            padding: 6px 10px;
            line-height: 1;
        }

        #mainNav .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(0, 217, 190, .5);
            border-radius: 6px;
        }

        @media (max-width: 991.98px) {
            #mainNav .navbar-collapse {
                background: var(--deep-sea);
                padding: 20px 16px;
                border-radius: 14px;
                margin-top: 12px;
                box-shadow: 0 10px 30px rgba(10, 30, 46, .4);
            }
            #mainNav .nav-link {
                padding: 12px 16px !important;
                margin: 4px 0;
                border-radius: 8px;
            }
            #mainNav .nav-link::after {
                display: none;
            }
            #mainNav .nav-cta {
                margin-top: 14px;
                display: flex;
                width: 100%;
            }
            #mainNav .nav-cta .btn-neon {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 页面横幅（分类页1） ===== */
        .page-banner {
            position: relative;
            background: linear-gradient(rgba(10, 30, 46, .78), rgba(14, 42, 58, .82)), url('/assets/images/coverpic/cover-2.webp') center center / cover no-repeat;
            padding: clamp(4.5rem, 8vw, 7rem) 0;
            text-align: center;
            color: #fff;
        }

        .page-banner .breadcrumb-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, .65);
            font-size: .82rem;
            background: rgba(255, 255, 255, .08);
            border-radius: 999px;
            padding: 6px 18px;
            margin-bottom: 22px;
            backdrop-filter: blur(4px);
        }

        .page-banner .breadcrumb-custom a {
            color: rgba(255, 255, 255, .8);
        }

        .page-banner .breadcrumb-custom a:hover {
            color: var(--neon-cyan);
        }

        .page-banner .breadcrumb-custom .sep {
            color: rgba(255, 255, 255, .5);
            margin: 0 2px;
        }

        .page-banner .banner-h1 {
            font-size: clamp(2rem, 4.6vw, 3.3rem);
            font-weight: 800;
            color: #fff;
            letter-spacing: .02em;
            margin-bottom: 16px;
            line-height: 1.25;
        }

        .page-banner .banner-h1 .neon-text {
            color: var(--neon-cyan);
            text-shadow: 0 0 20px rgba(0, 217, 190, .35);
        }

        .page-banner .banner-subtitle {
            font-size: 1.05rem;
            max-width: 640px;
            margin: 0 auto;
            color: rgba(255, 255, 255, .75);
            line-height: 1.8;
        }

        /* ===== 主内容区：行式卡片 + 侧边栏 ===== */
        .services-main {
            background: var(--mist-blue);
        }

        .services-main .row-card {
            display: flex;
            flex-direction: row;
            background: var(--pure-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(220, 231, 238, .6);
            overflow: hidden;
            margin-bottom: 24px;
            transition: var(--transition);
        }

        .services-main .row-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .services-main .row-card .card-img-wrap {
            flex: 0 0 240px;
            max-width: 240px;
            min-height: 200px;
            overflow: hidden;
            position: relative;
        }

        .services-main .row-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .services-main .row-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .services-main .row-card .card-img-wrap .img-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--neon-cyan);
            color: var(--deep-sea);
            font-size: .75rem;
            font-weight: 700;
            border-radius: 999px;
            padding: 4px 12px;
            box-shadow: 0 0 12px rgba(0, 217, 190, .3);
        }

        .services-main .row-card .card-body-info {
            padding: 26px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }

        .services-main .row-card .card-body-info h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: .01em;
        }

        .services-main .row-card .card-body-info p {
            color: var(--steel-blue);
            font-size: .95rem;
            margin-bottom: 14px;
            line-height: 1.8;
        }

        .services-main .row-card .card-body-info .card-tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 16px;
        }

        .services-main .row-card .card-body-info .mini-tag {
            display: inline-block;
            background: rgba(0, 217, 190, .1);
            color: #0f7a6e;
            font-size: .75rem;
            font-weight: 500;
            border-radius: 999px;
            padding: 3px 10px;
        }

        .services-main .row-card .card-body-info .learn-link {
            font-size: .88rem;
            font-weight: 600;
            color: var(--deep-sea);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .services-main .row-card .card-body-info .learn-link i {
            font-size: .8rem;
            transition: transform .25s ease;
        }

        .services-main .row-card .card-body-info .learn-link:hover {
            color: var(--neon-cyan);
        }

        .services-main .row-card .card-body-info .learn-link:hover i {
            transform: translateX(4px);
        }

        .sidebar-info {
            background: var(--pure-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(220, 231, 238, .6);
            padding: 28px;
            position: sticky;
            top: 100px;
        }

        .sidebar-info .side-title {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 14px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--neon-cyan);
            display: inline-block;
        }

        .sidebar-info p {
            font-size: .9rem;
            color: var(--steel-blue);
            line-height: 1.8;
        }

        .sidebar-info .side-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
            margin: 24px 0;
        }

        .sidebar-info .side-stats .stat-item {
            background: var(--mist-blue);
            border-radius: 12px;
            padding: 14px 10px;
            text-align: center;
        }

        .sidebar-info .side-stats .stat-item .num {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--neon-cyan);
            font-family: "Inter", "DIN Alternate", "PingFang SC", sans-serif;
        }

        .sidebar-info .side-stats .stat-item .label {
            font-size: .75rem;
            color: var(--steel-blue);
            margin-top: 4px;
        }

        .sidebar-info .side-img {
            border-radius: 12px;
            overflow: hidden;
            margin: 20px 0;
        }

        .sidebar-info .side-img img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            display: block;
        }

        .sidebar-info .btn-wrap {
            margin-top: 18px;
        }

        .sidebar-info .btn-wrap .btn-neon {
            width: 100%;
        }

        @media (max-width: 991.98px) {
            .services-main .row-card .card-img-wrap {
                flex: 0 0 200px;
                max-width: 200px;
            }
            .sidebar-info {
                margin-top: 24px;
                position: static;
            }
        }

        @media (max-width: 767.98px) {
            .services-main .row-card {
                flex-direction: column;
            }
            .services-main .row-card .card-img-wrap {
                flex: none;
                max-width: 100%;
                height: 180px;
            }
            .services-main .row-card .card-img-wrap img {
                height: 180px;
            }
            .sidebar-info .side-stats {
                grid-template-columns: 1fr 1fr 1fr;
            }
        }

        @media (max-width: 575.98px) {
            .sidebar-info .side-stats {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* ===== 适用场景 ===== */
        .scenario-section {
            background: var(--pure-white);
            border-top: 1px solid var(--mist-line);
            border-bottom: 1px solid var(--mist-line);
        }

        .scenario-card {
            background: var(--mist-blue);
            border-radius: var(--radius-card);
            padding: 30px 24px;
            height: 100%;
            border: 1px solid rgba(220, 231, 238, .5);
            transition: var(--transition);
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(0, 217, 190, .3);
        }

        .scenario-card .icon-box {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(0, 217, 190, .12);
            color: var(--deep-sea);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 18px;
        }

        .scenario-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .scenario-card p {
            font-size: .9rem;
            color: var(--steel-blue);
            margin-bottom: 0;
        }

        /* ===== 接入流程 ===== */
        .process-section {
            background: var(--mist-blue);
        }

        .process-step {
            text-align: center;
            padding: 32px 24px;
            background: var(--pure-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(220, 231, 238, .5);
            height: 100%;
            position: relative;
            transition: var(--transition);
        }

        .process-step:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .process-step .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--deep-sea);
            color: var(--neon-cyan);
            font-size: 1.3rem;
            font-weight: 800;
            font-family: "Inter", "DIN Alternate", sans-serif;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 0 18px rgba(0, 217, 190, .2);
            position: relative;
            z-index: 1;
        }

        .process-step .step-num::after {
            content: "";
            position: absolute;
            top: -4px;
            left: -4px;
            right: -4px;
            bottom: -4px;
            border-radius: 50%;
            border: 2px solid rgba(0, 217, 190, .4);
        }

        .process-step h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: .88rem;
            color: var(--steel-blue);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--pure-white);
        }

        .faq-accordion .accordion-item {
            border: none;
            border-radius: 14px !important;
            background: var(--mist-blue);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }

        .faq-accordion .accordion-item:last-child {
            margin-bottom: 0;
        }

        .faq-accordion .accordion-item:hover {
            box-shadow: var(--shadow-hover);
        }

        .faq-accordion .accordion-header {
            background: transparent;
            border: none;
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--ink-blue);
            font-weight: 600;
            font-size: .98rem;
            padding: 20px 24px;
            border: none;
            border-radius: 14px 14px 0 0 !important;
            box-shadow: none;
            display: flex;
            align-items: center;
            gap: 14px;
            width: 100%;
            text-align: left;
            position: relative;
            transition: var(--transition);
        }

        .faq-accordion .accordion-button::before {
            content: "+";
            display: inline-flex;
            flex: 0 0 30px;
            height: 30px;
            align-items: center;
            justify-content: center;
            background: var(--deep-sea);
            color: var(--neon-cyan);
            border-radius: 50%;
            font-size: 1.1rem;
            font-weight: 400;
            line-height: 1;
            transition: transform .3s ease;
        }

        .faq-accordion .accordion-button::after {
            display: none;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(0, 217, 190, .05);
            color: var(--deep-sea);
        }

        .faq-accordion .accordion-button:not(.collapsed)::before {
            transform: rotate(45deg);
            background: var(--neon-cyan);
            color: var(--deep-sea);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid rgba(0, 217, 190, .5);
            outline-offset: -2px;
        }

        .faq-accordion .accordion-body {
            padding: 4px 24px 22px 58px;
            color: var(--steel-blue);
            font-size: .92rem;
            line-height: 1.85;
            background: transparent;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background: var(--deep-sea);
            position: relative;
            overflow: hidden;
            padding: clamp(4rem, 7vw, 5.5rem) 0;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: var(--neon-cyan);
            filter: blur(120px);
            opacity: .14;
            top: -100px;
            right: -80px;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: var(--neon-cyan);
            filter: blur(110px);
            opacity: .08;
            bottom: -100px;
            left: -60px;
        }

        .cta-section .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-section .cta-h2 {
            color: #fff;
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 700;
            margin-bottom: 14px;
        }

        .cta-section .cta-desc {
            color: rgba(255, 255, 255, .7);
            font-size: 1rem;
            margin-bottom: 30px;
        }

        .cta-section .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 575.98px) {
            .cta-section .cta-btns .btn-neon,
            .cta-section .cta-btns .btn-white-outline {
                width: 100%;
            }
        }

        /* ===== 返回首页 ===== */
        .back-home-bar {
            background: var(--mist-blue);
            padding: 24px 0;
            text-align: center;
            border-top: 1px solid var(--mist-line);
        }

        .back-home-bar a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            font-size: .95rem;
            color: var(--deep-sea);
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            background: var(--pure-white);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }

        .back-home-bar a:hover {
            box-shadow: var(--shadow-hover);
            color: var(--neon-cyan);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--deep-sea);
            color: rgba(255, 255, 255, .65);
            padding: 64px 0 0;
            border-top: 2px solid var(--neon-cyan);
        }

        .footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .footer .footer-brand .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--neon-cyan);
            border-radius: 10px;
            color: var(--deep-sea);
            font-size: 1.2rem;
        }

        .footer .footer-desc {
            font-size: .88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            margin-bottom: 18px;
            max-width: 300px;
        }

        .footer .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
            color: rgba(255, 255, 255, .7);
            font-size: .9rem;
            transition: var(--transition);
        }

        .footer .footer-social a:hover {
            background: var(--neon-cyan);
            color: var(--deep-sea);
            box-shadow: var(--shadow-neon);
        }

        .footer h5 {
            color: #fff;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: .02em;
        }

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

        .footer .footer-links li {
            margin-bottom: 10px;
        }

        .footer .footer-links a {
            color: rgba(255, 255, 255, .65);
            font-size: .88rem;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer .footer-links a:hover {
            color: var(--neon-cyan);
            padding-left: 4px;
        }

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

        .footer .footer-contact-list li {
            color: rgba(255, 255, 255, .65);
            font-size: .88rem;
            margin-bottom: 10px;
            display: flex;
            gap: 8px;
            align-items: flex-start;
        }

        .footer .footer-contact-list i {
            color: var(--neon-cyan);
            margin-top: 4px;
            font-size: .85rem;
        }

        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 18px 0;
            margin-top: 50px;
            text-align: center;
            font-size: .82rem;
            color: rgba(255, 255, 255, .4);
        }

        .footer .footer-bottom a {
            color: rgba(255, 255, 255, .5);
        }

        .footer .footer-bottom a:hover {
            color: var(--neon-cyan);
        }

        @media (max-width: 767.98px) {
            .footer .col-md-6 {
                margin-bottom: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .footer {
                padding-top: 48px;
            }
            .footer .footer-bottom {
                margin-top: 30px;
                font-size: .78rem;
            }
        }

/* roulang page: category3 */
:root {
  --deep-sea: #0A1E2E;
  --deep-sea-2: #0E2A3A;
  --neon: #00D9BE;
  --neon-light: #00E8D0;
  --mist: #F2F7FC;
  --white: #FFFFFF;
  --ink: #16303F;
  --steel: #4D6878;
  --line: #DCE7EE;
  --radius-card: 14px;
  --radius-btn: 10px;
  --shadow-card: 0 4px 20px rgba(10,30,46,.06);
  --shadow-hover: 0 10px 30px rgba(10,30,46,.12);
  --shadow-neon: 0 0 16px rgba(0,217,190,.35);
  --transition: all .25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--mist);
  color: var(--steel);
  line-height: 1.75;
  font-size: 1rem;
  padding-top: 72px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

.container {
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
}

/* ===== 导航 ===== */
#mainNav {
  background: var(--deep-sea);
  min-height: 72px;
  padding: 0;
  transition: box-shadow .3s ease;
}

#mainNav.scrolled {
  box-shadow: 0 4px 20px rgba(10,30,46,.3);
}

#mainNav .container {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 72px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: .02em;
  padding: 0;
  margin: 0;
}

.navbar-brand:hover,
.navbar-brand:focus {
  color: var(--neon);
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(0,217,190,.12);
  border: 1px solid rgba(0,217,190,.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.navbar-nav {
  align-items: center;
}

.nav-item {
  margin: 0 4px;
}

.nav-link {
  position: relative;
  color: rgba(255,255,255,.8) !important;
  font-size: .95rem;
  font-weight: 500;
  padding: 8px 14px !important;
  letter-spacing: .02em;
  transition: var(--transition);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background: var(--neon);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .25s ease;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--white) !important;
}

.nav-link:hover::after,
.nav-link:focus::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: var(--white) !important;
  font-weight: 600;
}

.nav-link.active::after {
  transform: scaleX(1);
  box-shadow: 0 2px 10px rgba(0,217,190,.35);
}

.nav-cta {
  margin-left: 8px;
}

.btn-neon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--neon);
  color: var(--deep-sea);
  font-weight: 600;
  font-size: .92rem;
  padding: 9px 22px;
  border-radius: var(--radius-btn);
  border: none;
  min-height: 44px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-neon:hover,
.btn-neon:focus-visible {
  background: var(--neon-light);
  color: var(--deep-sea);
  box-shadow: var(--shadow-neon);
  transform: translateY(-2px);
}

.btn-neon:focus-visible,
.btn-outline-neon:focus-visible,
.nav-link:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 2px solid rgba(0,217,190,.5);
  outline-offset: 2px;
}

.navbar-toggler {
  border: 1px solid rgba(255,255,255,.2);
  color: var(--white);
  padding: 6px 12px;
  font-size: 1.1rem;
  border-radius: 8px;
  background: transparent;
  transition: var(--transition);
}

.navbar-toggler:hover {
  border-color: var(--neon);
  color: var(--neon);
}

.navbar-toggler:focus {
  box-shadow: none;
  outline: 2px solid rgba(0,217,190,.5);
  outline-offset: 2px;
}

/* ===== 顶部左右式标题区 ===== */
.page-heading {
  background: linear-gradient(135deg, #F2F7FC 0%, #fff 50%, #E4F0F8 100%);
  padding: clamp(3.5rem, 6vw, 5.5rem) 0;
  border-bottom: 1px solid var(--line);
}

.page-heading .heading-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,217,190,.1);
  border: 1px solid rgba(0,217,190,.3);
  color: var(--neon);
  font-size: .82rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: .03em;
  margin-bottom: 18px;
}

.page-heading h1 {
  font-size: clamp(2rem, 4.2vw, 3rem);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: .01em;
}

.page-heading h1 span {
  color: var(--neon);
  position: relative;
}

.page-heading .heading-desc {
  font-size: 1.06rem;
  color: var(--steel);
  max-width: 520px;
  line-height: 1.85;
  margin-bottom: 24px;
}

.page-heading .heading-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.heading-meta .meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--white);
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: .85rem;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: 999px;
  box-shadow: var(--shadow-card);
}

.heading-meta .meta-badge i {
  color: var(--neon);
}

.heading-media {
  position: relative;
}

.heading-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: 20px;
  border: 6px solid var(--white);
  box-shadow: 0 20px 50px rgba(10,30,46,.15);
}

.heading-media::after {
  content: "";
  position: absolute;
  right: -14px;
  bottom: -14px;
  width: 100px;
  height: 100px;
  border-radius: 20px;
  background: var(--neon);
  opacity: .12;
  z-index: -1;
}

/* ===== 交错案例区 ===== */
.cases-gallery {
  padding: clamp(4rem, 8vw, 6.5rem) 0;
  background: var(--white);
}

.cases-gallery .section-intro {
  text-align: center;
  max-width: 680px;
  margin: 0 auto clamp(2.5rem, 4vw, 3.5rem);
}

.cases-gallery .section-intro h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}

.cases-gallery .section-intro p {
  color: var(--steel);
  font-size: .98rem;
}

.case-block {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: clamp(3rem, 5vw, 4.5rem);
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition);
}

.case-block:last-child {
  margin-bottom: 0;
}

.case-block:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.case-media {
  width: 60%;
  position: relative;
  overflow: hidden;
  min-height: 340px;
}

.case-media img {
  width: 100%;
  height: 100%;
  min-height: 340px;
  object-fit: cover;
  transition: transform .45s ease;
}

.case-block:hover .case-media img {
  transform: scale(1.02);
}

.case-media .case-corner {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--neon);
  color: var(--deep-sea);
  font-size: .85rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: .02em;
  box-shadow: 0 4px 14px rgba(0,217,190,.35);
}

.case-content {
  width: 40%;
  padding: 40px 36px;
}

.case-content .case-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--neon);
  background: rgba(0,217,190,.08);
  border: 1px solid rgba(0,217,190,.25);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.case-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 12px;
}

.case-content .case-desc {
  font-size: .95rem;
  color: var(--steel);
  line-height: 1.8;
  margin-bottom: 18px;
}

.case-points {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.case-points li {
  position: relative;
  padding-left: 18px;
  font-size: .9rem;
  color: var(--ink);
  margin-bottom: 8px;
}

.case-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--neon);
}

.case-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .92rem;
  font-weight: 600;
  color: var(--ink);
  transition: var(--transition);
}

.case-link i {
  transition: transform .25s ease;
}

.case-link:hover {
  color: var(--neon);
}

.case-link:hover i {
  transform: translateX(4px);
}

/* 反向排列 */
.case-block.reverse .case-media {
  order: 2;
}

.case-block.reverse .case-content {
  order: 1;
}

/* ===== CTA 横条 ===== */
.cta-bar {
  background: var(--deep-sea);
  color: var(--white);
  padding: clamp(3rem, 5vw, 4.5rem) 0;
  position: relative;
  overflow: hidden;
}

.cta-bar::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(0,217,190,.12);
  filter: blur(70px);
}

.cta-bar::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: 10%;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(0,217,190,.08);
  filter: blur(50px);
}

.cta-bar .container {
  position: relative;
  z-index: 1;
}

.cta-bar h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.cta-bar p {
  color: rgba(255,255,255,.7);
  font-size: 1rem;
  max-width: 520px;
  margin-bottom: 28px;
}

.cta-bar .btn-neon {
  min-width: 150px;
}

.cta-bar .btn-outline-neon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1.5px solid var(--white);
  color: var(--white);
  font-weight: 600;
  font-size: .92rem;
  padding: 10px 22px;
  border-radius: var(--radius-btn);
  min-height: 44px;
  cursor: pointer;
  transition: var(--transition);
  margin-left: 14px;
}

.cta-bar .btn-outline-neon:hover,
.cta-bar .btn-outline-neon:focus-visible {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(0,217,190,.08);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--deep-sea);
  color: rgba(255,255,255,.65);
  border-top: 2px solid var(--neon);
  padding-top: 56px;
}

.footer .row {
  padding-bottom: 36px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 14px;
}

.footer-desc {
  font-size: .9rem;
  line-height: 1.75;
  color: rgba(255,255,255,.6);
  max-width: 280px;
  margin-bottom: 18px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.7);
  font-size: .95rem;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--neon);
  color: var(--deep-sea);
  box-shadow: var(--shadow-neon);
}

.footer h5 {
  color: var(--white);
  font-size: .95rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: .02em;
}

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: rgba(255,255,255,.65);
  font-size: .92rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--neon);
  padding-left: 4px;
}

.footer-contact-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: .9rem;
  color: rgba(255,255,255,.65);
  margin-bottom: 10px;
}

.footer-contact-list i {
  color: var(--neon);
  margin-top: 5px;
  width: 16px;
  text-align: center;
  font-size: .85rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 18px 0;
  text-align: center;
  font-size: .85rem;
  color: rgba(255,255,255,.5);
}

.footer-bottom a {
  color: rgba(255,255,255,.65);
}

.footer-bottom a:hover {
  color: var(--neon);
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
  body {
    padding-top: 0;
  }

  #mainNav {
    min-height: 64px;
  }

  #mainNav .container {
    min-height: 64px;
    flex-wrap: wrap;
  }

  .navbar-brand {
    font-size: 1rem;
  }

  .navbar-collapse {
    background: var(--deep-sea);
    padding: 20px;
    border-radius: 0 0 14px 14px;
    box-shadow: 0 20px 30px rgba(10,30,46,.3);
  }

  .navbar-nav {
    align-items: flex-start;
    padding: 10px 0;
  }

  .nav-item {
    width: 100%;
    margin: 0;
  }

  .nav-link {
    padding: 12px 8px !important;
    font-size: 1rem;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }

  .nav-link::after {
    display: none;
  }

  .nav-cta {
    margin: 14px 0 4px;
    width: 100%;
  }

  .btn-neon {
    width: 100%;
  }

  .case-block,
  .case-block.reverse {
    flex-direction: column;
  }

  .case-media,
  .case-media img,
  .case-block.reverse .case-media,
  .case-block.reverse .case-content,
  .case-content {
    width: 100%;
    order: 0;
  }

  .case-media,
  .case-media img {
    min-height: 240px;
  }

  .case-content {
    padding: 28px 24px;
  }

  .cta-bar .btn-outline-neon {
    margin-left: 0;
    margin-top: 12px;
    width: 100%;
  }

  .cta-bar .btn-neon {
    width: 100%;
  }
}

@media (max-width: 767.98px) {
  .page-heading {
    padding: 3rem 0;
  }

  .heading-media img {
    height: 240px;
    margin-top: 28px;
  }

  .page-heading h1 {
    font-size: 1.75rem;
  }

  .heading-desc {
    font-size: .95rem;
  }

  .case-media,
  .case-media img {
    min-height: 200px;
  }

  .footer .row > div {
    margin-bottom: 30px;
  }
}

@media (max-width: 575.98px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .heading-media img {
    height: 200px;
  }

  .case-content {
    padding: 22px 18px;
  }

  .case-content h3 {
    font-size: 1.1rem;
  }

  .case-desc {
    font-size: .9rem;
  }

  .case-points li {
    font-size: .85rem;
  }
}

/* roulang page: category2 */
:root{
  --neon:#00D9BE;
  --deep:#0A1E2E;
  --deep2:#0E2A3A;
  --light:#F2F7FC;
  --white:#FFFFFF;
  --ink:#16303F;
  --steel:#4D6878;
  --line:#DCE7EE;
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 4px 20px rgba(10,30,46,.06);
  --shadow-hover:0 10px 30px rgba(10,30,46,.12);
  --font-base:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","DIN Alternate","PingFang SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-base);
  color:var(--steel);
  background:var(--light);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{color:var(--ink);font-weight:700;}
h1{letter-spacing:.01em;}
a{color:var(--ink);text-decoration:none;transition:color .25s ease;}
a:hover{color:var(--neon);}
img{max-width:100%;}
.container{max-width:1200px;padding-left:20px;padding-right:20px;}
section{padding:clamp(4rem,8vw,6.5rem) 0;}
.section-head{margin-bottom:48px;}
.section-head .head-line{
  display:inline-block;width:48px;height:3px;
  background:var(--neon);border-radius:2px;margin-bottom:16px;
}
.section-head h2{font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:12px;line-height:1.3;}
.section-head p{color:var(--steel);font-size:1rem;max-width:560px;line-height:1.8;}

/* 导航 */
#mainNav{
  background:var(--deep);
  min-height:72px;
  padding-top:0;
  padding-bottom:0;
  box-shadow:0 4px 20px rgba(10,30,46,.3);
  z-index:1040;
}
#mainNav .navbar-brand{
  color:#fff;
  font-weight:700;
  font-size:1.1rem;
  display:flex;
  align-items:center;
  padding:.5rem 0;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  border-radius:10px;
  background:rgba(0,217,190,.15);
  color:var(--neon);
  margin-right:8px;
  font-size:1rem;
}
#mainNav .navbar-toggler{
  border:1px solid rgba(255,255,255,.3);
  color:#fff;
  border-radius:10px;
  padding:6px 10px;
}
#mainNav .navbar-toggler:focus{
  box-shadow:0 0 0 .2rem rgba(0,217,190,.25);
}
#mainNav .navbar-nav .nav-link{
  color:rgba(255,255,255,.8);
  font-weight:500;
  font-size:.96rem;
  padding:.6rem 1rem;
  position:relative;
  white-space:nowrap;
}
#mainNav .navbar-nav .nav-link::after{
  content:'';
  position:absolute;
  left:1rem;
  right:1rem;
  bottom:4px;
  height:2px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .25s ease;
}
#mainNav .navbar-nav .nav-link:hover{color:#fff;}
#mainNav .navbar-nav .nav-link:hover::after{transform:scaleX(1);}
#mainNav .navbar-nav .nav-link.active{
  color:#fff;
  box-shadow:0 2px 10px rgba(0,217,190,.35);
  border-radius:8px 8px 0 0;
}
#mainNav .navbar-nav .nav-link.active::after{transform:scaleX(1);}
.nav-cta{margin-left:8px;}
.btn-neon{
  display:inline-block;
  background:var(--neon);
  color:var(--deep);
  font-weight:600;
  font-size:.95rem;
  padding:12px 28px;
  border-radius:10px;
  text-decoration:none;
  border:2px solid transparent;
  transition:all .25s ease;
  line-height:1.6;
  min-height:44px;
  cursor:pointer;
}
.btn-neon:hover{
  background:#00E8D0;
  box-shadow:0 0 20px rgba(0,217,190,.35);
  transform:translateY(-2px);
  color:var(--deep);
}
.btn-neon:focus-visible{
  outline:2px solid rgba(0,217,190,.5);
  outline-offset:2px;
}
.btn-outline{
  display:inline-block;
  background:transparent;
  color:var(--ink);
  border:1.5px solid var(--ink);
  font-weight:600;
  font-size:.95rem;
  padding:12px 28px;
  border-radius:10px;
  text-decoration:none;
  transition:all .25s ease;
  line-height:1.6;
  min-height:44px;
  cursor:pointer;
}
.btn-outline:hover{
  border-color:var(--neon);
  color:var(--neon);
  background:rgba(10,30,46,.04);
  transform:translateY(-2px);
}
.btn-outline:focus-visible{
  outline:2px solid rgba(0,217,190,.5);
  outline-offset:2px;
}

/* 页面英雄区 */
.page-hero{
  background:linear-gradient(135deg,#F2F7FC 0%,#fff 45%,#E4F0F8 100%);
  padding:88px 0 72px;
  border-bottom:1px solid var(--line);
  position:relative;
  overflow:hidden;
}
.page-hero::before{
  content:'';
  position:absolute;
  width:420px;
  height:420px;
  border-radius:50%;
  background:rgba(0,217,190,.12);
  filter:blur(80px);
  top:-120px;
  right:-60px;
  pointer-events:none;
}
.breadcrumb-custom{
  font-size:.85rem;
  color:var(--steel);
  margin-bottom:20px;
}
.breadcrumb-custom a{color:var(--steel);}
.breadcrumb-custom a:hover{color:var(--neon);}
.breadcrumb-custom .sep{margin:0 8px;color:var(--line);}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:rgba(0,217,190,.12);
  color:var(--deep);
  font-size:.82rem;
  font-weight:600;
  padding:6px 14px;
  border-radius:999px;
  margin-bottom:18px;
}
.page-hero h1{
  font-size:clamp(2rem,4.4vw,3rem);
  line-height:1.25;
  margin-bottom:18px;
}
.page-hero .lead-text{
  font-size:1.05rem;
  color:var(--steel);
  max-width:560px;
  line-height:1.85;
  margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-aside-card{
  background:#fff;
  border-radius:var(--radius-lg);
  box-shadow:0 20px 50px rgba(10,30,46,.12);
  padding:32px 28px;
  border:1px solid var(--line);
  position:relative;
  z-index:2;
  max-width:360px;
  margin-left:auto;
}
.aside-icon{
  width:48px;
  height:48px;
  border-radius:12px;
  background:rgba(0,217,190,.12);
  color:var(--deep);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.2rem;
  margin-bottom:18px;
}
.aside-title{
  font-weight:600;
  color:var(--ink);
  font-size:1rem;
  margin-bottom:20px;
}
.aside-stats .stat-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:10px 0;
  border-bottom:1px dashed var(--line);
  font-size:.9rem;
}
.aside-stats .stat-row:last-child{border-bottom:none;}
.aside-stats .stat-row strong{
  font-family:var(--font-num);
  font-size:1.05rem;
  color:var(--deep);
}
.status-line{
  display:flex;
  align-items:center;
  gap:8px;
  margin-top:20px;
  font-size:.85rem;
  color:var(--steel);
}
.status-line .dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--neon);
  box-shadow:0 0 8px rgba(0,217,190,.6);
}

/* 快速上手 */
.section-steps{background:var(--white);}
.step-card{
  background:var(--light);
  border-radius:var(--radius);
  padding:32px 24px;
  height:100%;
  position:relative;
  transition:all .25s ease;
  border:1px solid transparent;
}
.step-card:hover{
  border-color:var(--line);
  box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
}
.step-num{
  position:absolute;
  top:20px;
  right:24px;
  font-family:var(--font-num);
  font-size:2rem;
  font-weight:800;
  color:rgba(0,217,190,.35);
  line-height:1;
}
.step-icon{
  width:44px;
  height:44px;
  border-radius:50%;
  background:rgba(10,30,46,.06);
  color:var(--deep);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  margin-bottom:16px;
}
.step-card h3{font-size:1.15rem;font-weight:600;margin-bottom:8px;}
.step-card p{font-size:.92rem;color:var(--steel);line-height:1.75;margin-bottom:0;}

/* 指南卡片 */
.section-guides{background:var(--light);}
.guide-card{
  background:#fff;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:hidden;
  height:100%;
  transition:all .25s ease;
  position:relative;
  display:flex;
  flex-direction:column;
}
.guide-card::after{
  content:'';
  position:absolute;
  left:0;right:0;bottom:0;
  height:3px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s ease;
}
.guide-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
}
.guide-card:hover::after{transform:scaleX(1);}
.guide-card .card-thumb{
  position:relative;
  overflow:hidden;
  height:170px;
}
.guide-card .card-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.guide-card:hover .card-thumb img{transform:scale(1.03);}
.card-cat{
  position:absolute;
  top:14px;
  left:14px;
  background:rgba(10,30,46,.75);
  color:#fff;
  font-size:.75rem;
  font-weight:500;
  padding:4px 12px;
  border-radius:999px;
  backdrop-filter:blur(4px);
}
.guide-card .card-body{
  padding:24px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.guide-card .card-body h3{
  font-size:1.15rem;
  font-weight:600;
  margin-bottom:8px;
  line-height:1.45;
}
.guide-card .card-body p{
  font-size:.9rem;
  color:var(--steel);
  line-height:1.75;
  margin-bottom:16px;
  flex:1;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-link{
  font-size:.88rem;
  font-weight:600;
  color:var(--deep);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.card-link i{transition:transform .25s ease;font-size:.75rem;}
.card-link:hover{color:var(--neon);}
.card-link:hover i{transform:translateX(4px);}

/* 设备支持 */
.section-device{background:var(--white);}
.device-item{
  background:var(--light);
  border-radius:var(--radius);
  padding:26px 16px;
  text-align:center;
  height:100%;
  transition:all .25s ease;
  border:1px solid transparent;
}
.device-item:hover{
  border-color:var(--neon);
  box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
}
.device-item i{
  font-size:2rem;
  color:var(--deep);
  display:block;
  margin-bottom:10px;
  transition:color .25s ease;
}
.device-item:hover i{color:var(--neon);}
.device-item span{
  font-size:.88rem;
  font-weight:500;
  color:var(--ink);
}

/* FAQ */
.section-faq{background:var(--light);}
.faq-accordion .accordion-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  margin-bottom:12px;
  overflow:hidden;
}
.faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)){
  border-left:3px solid var(--neon);
}
.faq-accordion .accordion-button{
  background:#fff;
  color:var(--ink);
  font-weight:600;
  font-size:1rem;
  padding:20px 24px;
  box-shadow:none;
  border:none;
}
.faq-accordion .accordion-button:not(.collapsed){
  background:#fff;
  color:var(--ink);
  box-shadow:none;
}
.faq-accordion .accordion-button:hover{
  background:#F7FAFC;
  border-radius:16px;
}
.faq-accordion .accordion-button:focus{
  box-shadow:0 0 0 .2rem rgba(0,217,190,.15);
  border-radius:16px;
}
.faq-accordion .accordion-button::after{
  content:'\f067';
  font-family:'Font Awesome 6 Free';
  font-weight:900;
  background:none;
  width:auto;
  height:auto;
  font-size:.85rem;
  color:var(--neon);
  transform:none;
  transition:transform .25s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  color:var(--neon);
}
.faq-accordion .accordion-body{
  padding:0 24px 24px;
  color:var(--steel);
  line-height:1.8;
  font-size:.95rem;
}

/* CTA 条 */
.cta-banner{
  background:
    linear-gradient(rgba(10,30,46,.82),rgba(10,30,46,.82)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  padding:80px 0;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-banner::before{
  content:'';
  position:absolute;
  width:300px;
  height:300px;
  border-radius:50%;
  background:rgba(0,217,190,.15);
  filter:blur(70px);
  top:-60px;
  left:50%;
  transform:translateX(-50%);
}
.cta-banner h2{
  color:#fff;
  font-size:clamp(1.5rem,3vw,2.2rem);
  margin-bottom:14px;
  position:relative;
  z-index:2;
}
.cta-banner p{
  color:rgba(255,255,255,.75);
  font-size:1rem;
  max-width:560px;
  margin:0 auto 28px;
  position:relative;
  z-index:2;
}
.cta-banner .btn-neon{
  position:relative;
  z-index:2;
}
.cta-banner .btn-outline{
  border-color:rgba(255,255,255,.7);
  color:#fff;
  margin-left:12px;
  position:relative;
  z-index:2;
}
.cta-banner .btn-outline:hover{
  background:#fff;
  color:var(--deep);
  border-color:#fff;
}

/* 联系 */
.section-contact{background:var(--light);}
.contact-card{
  background:#fff;
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  padding:clamp(28px,4vw,52px);
}
.contact-card h2{
  font-size:clamp(1.4rem,2.4vw,1.9rem);
  margin-bottom:8px;
}
.contact-card .contact-sub{
  color:var(--steel);
  margin-bottom:28px;
}
.form-label{
  color:var(--ink);
  font-weight:500;
  font-size:.9rem;
  margin-bottom:6px;
}
.form-control{
  border:1px solid var(--line);
  border-radius:10px;
  padding:12px 14px;
  font-size:.95rem;
  color:var(--ink);
  background:var(--white);
  transition:all .25s ease;
}
.form-control::placeholder{color:rgba(77,104,120,.55);}
.form-control:focus{
  border-color:var(--neon);
  box-shadow:0 0 0 .2rem rgba(0,217,190,.15);
  color:var(--ink);
}
textarea.form-control{resize:vertical;}
.form-tip{
  font-size:.78rem;
  color:var(--steel);
  text-align:center;
  margin-top:12px;
}
.contact-info-list{
  list-style:none;
  padding:0;
  margin:0;
}
.contact-info-list li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:12px 0;
  font-size:.92rem;
  color:var(--steel);
  border-bottom:1px dashed var(--line);
}
.contact-info-list li:last-child{border-bottom:none;}
.contact-info-list i{
  color:var(--neon);
  font-size:1rem;
  margin-top:5px;
  width:18px;
  text-align:center;
}

/* Footer */
.footer{
  background:var(--deep);
  color:rgba(255,255,255,.65);
  padding:64px 0 0;
  border-top:2px solid var(--neon);
}
.footer .footer-brand{
  display:flex;
  align-items:center;
  font-size:1.1rem;
  font-weight:700;
  color:#fff;
  margin-bottom:14px;
}
.footer-desc{
  font-size:.88rem;
  line-height:1.8;
  margin-bottom:18px;
}
.footer-social{
  display:flex;
  gap:10px;
}
.footer-social a{
  width:36px;
  height:36px;
  border-radius:10px;
  background:rgba(255,255,255,.08);
  color:rgba(255,255,255,.75);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:.9rem;
  transition:all .25s ease;
}
.footer-social a:hover{
  background:var(--neon);
  color:var(--deep);
  transform:translateY(-2px);
}
.footer h5{
  color:#fff;
  font-size:.95rem;
  font-weight:600;
  margin-bottom:12px;
}
.footer-links{
  list-style:none;
  padding:0;
  margin:0;
}
.footer-links li{margin-bottom:10px;}
.footer-links a{
  color:rgba(255,255,255,.65);
  font-size:.88rem;
  transition:all .25s ease;
}
.footer-links a:hover{color:var(--neon);padding-left:4px;}
.footer-contact-list{
  list-style:none;
  padding:0;
  margin:0;
}
.footer-contact-list li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:.85rem;
  color:rgba(255,255,255,.65);
  margin-bottom:10px;
}
.footer-contact-list i{
  color:var(--neon);
  margin-top:5px;
  font-size:.85rem;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0;
  margin-top:48px;
  text-align:center;
  font-size:.82rem;
  color:rgba(255,255,255,.5);
}
.footer-bottom a{
  color:rgba(255,255,255,.5);
}
.footer-bottom a:hover{color:var(--neon);}

/* 响应式 */
@media (max-width:991.98px){
  #mainNav .navbar-collapse{
    background:var(--deep);
    padding:18px;
    border-radius:16px;
    margin-top:12px;
    box-shadow:0 10px 30px rgba(10,30,46,.4);
  }
  #mainNav .navbar-nav .nav-link{
    padding:12px 8px;
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  #mainNav .navbar-nav .nav-link::after{display:none;}
  #mainNav .navbar-nav .nav-link.active{
    background:rgba(0,217,190,.12);
    color:var(--neon);
    border-radius:10px;
  }
  .nav-cta{
    margin-left:0;
    margin-top:16px;
    text-align:center;
  }
  .nav-cta .btn-neon{width:100%;}
  .hero-aside-card{
    margin-left:0;
    margin-top:32px;
    max-width:100%;
  }
  .section-steps .step-card{margin-bottom:0;}
  .cta-banner .btn-outline{margin-left:0;margin-top:12px;}
}
@media (max-width:767.98px){
  section{padding:3.5rem 0;}
  .page-hero{padding:64px 0 48px;}
  .page-hero h1{font-size:1.85rem;}
  .hero-actions .btn-neon,
  .hero-actions .btn-outline{width:100%;text-align:center;}
  .section-head{margin-bottom:32px;}
  .guide-card .card-thumb{height:150px;}
  .footer{padding-top:40px;}
  .footer .row [class^="col-"]{margin-bottom:28px;}
  .footer-bottom{margin-top:24px;}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px;}
  .contact-card{padding:24px 18px;}
  .breadcrumb-custom{font-size:.78rem;}
  .hero-tag{font-size:.75rem;}
  .step-card{padding:24px 18px;}
}