/* 牛盾网官网 — 品牌色 #0B3A5C / #D97706 */
:root {
  --brand: #0B3A5C;
  --brand-deep: #072a44;
  --accent: #D97706;
  --accent-light: #f59e0b;
  --text: #1a2b3c;
  --text-muted: #5a6b7c;
  --bg: #f4f7fa;
  --white: #ffffff;
  --radius: 12px;
  --font-serif: "Noto Serif SC", "Songti SC", serif;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --header-h: 64px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --content-max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--accent);
}

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

/* —— 全幅大气背景 —— */
.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(11, 58, 92, 0.45) 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 85% 20%, rgba(217, 119, 6, 0.18) 0%, transparent 50%),
    radial-gradient(ellipse 90% 70% at 50% 100%, rgba(7, 42, 68, 0.35) 0%, transparent 60%),
    linear-gradient(165deg, #0a3250 0%, #0d4a6e 35%, #1a5f7a 65%, #0b3a5c 100%);
}

.site-bg__mesh {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(circle at 30% 40%, rgba(217, 119, 6, 0.12) 0%, transparent 42%),
    radial-gradient(circle at 72% 28%, rgba(255, 255, 255, 0.07) 0%, transparent 38%);
  animation: mesh-drift 22s ease-in-out infinite alternate;
  will-change: transform;
}

.site-bg__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 70% 35%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 70% 35%, #000 20%, transparent 75%);
  opacity: 0.7;
}

.site-bg__shield {
  position: absolute;
  right: -2%;
  top: 8%;
  width: min(46vw, 520px);
  height: auto;
  color: rgba(255, 255, 255, 0.55);
  opacity: 0.55;
  animation: shield-float 10s ease-in-out infinite;
  will-change: transform;
  pointer-events: none;
}

.shield-outline {
  stroke-dasharray: 980;
  stroke-dashoffset: 980;
  animation: shield-draw 2.4s var(--ease-out) 0.3s forwards;
}

.shield-mark {
  opacity: 0;
  animation: fade-soft 1s ease 1.4s forwards;
}

@keyframes mesh-drift {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to { transform: translate3d(3%, 2%, 0) scale(1.06); }
}

@keyframes shield-float {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50% { transform: translate3d(-12px, 18px, 0); }
}

@keyframes shield-draw {
  to { stroke-dashoffset: 0; }
}

@keyframes fade-soft {
  to { opacity: 1; }
}

/* —— 导航 —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(11, 58, 92, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.3s ease, box-shadow 0.3s ease, height 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(7, 42, 68, 0.92);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
}

.header-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 1.5rem;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.logo span {
  color: var(--accent-light);
}

.nav-desktop {
  display: flex;
  gap: 0.25rem 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-desktop a {
  position: relative;
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.35rem 0;
  transition: color 0.2s ease;
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1.5px;
  background: var(--accent-light);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease-out);
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--accent-light);
}

.nav-desktop a:hover::after,
.nav-desktop a.active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.btn-nav {
  display: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

.nav-mobile {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: rgba(11, 58, 92, 0.97);
  padding: 1rem 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-mobile.open {
  display: block;
  animation: nav-drop 0.28s var(--ease-out);
}

@keyframes nav-drop {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.nav-mobile a {
  display: block;
  color: var(--white);
  padding: 0.65rem 0;
  font-size: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

/* —— 主内容区 —— */
main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 1.5rem 4.5rem;
}

/* —— Hero（无卡片，一屏构图） —— */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 3.5rem 0 5rem;
  color: var(--white);
  max-width: 40rem;
}

.hero-brand {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 7vw, 4.75rem);
  font-weight: 700;
  line-height: 1.08;
  margin: 0 0 0.45rem;
  letter-spacing: 0.06em;
  text-shadow: 0 2px 40px rgba(0, 0, 0, 0.2);
}

.hero-domain {
  font-size: 0.95rem;
  opacity: 0.65;
  margin: 0 0 1.6rem;
  letter-spacing: 0.16em;
  text-transform: lowercase;
}

.hero-slogan {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  font-weight: 500;
  max-width: 36rem;
  margin: 0 0 0.85rem;
  line-height: 1.45;
}

.hero-support {
  font-size: 1.05rem;
  opacity: 0.82;
  max-width: 34rem;
  margin: 0 0 2.5rem;
  line-height: 1.7;
}

.hero-scroll {
  position: absolute;
  left: 0;
  bottom: 1.75rem;
  width: 22px;
  height: 36px;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 7px;
  opacity: 0;
  transition: opacity 0.4s ease, border-color 0.2s;
}

.hero.is-ready .hero-scroll {
  opacity: 0.7;
  animation: scroll-hint 0.6s var(--ease-out) 1.8s both;
}

.hero-scroll:hover {
  border-color: var(--accent-light);
  opacity: 1;
}

.hero-scroll__line {
  width: 2px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent-light);
  animation: scroll-line 1.6s ease-in-out infinite;
}

@keyframes scroll-hint {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 0.7; transform: translateY(0); }
}

@keyframes scroll-line {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(10px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* 首屏入场 */
.reveal {
  opacity: 0;
  transform: translateY(22px);
}

.hero.is-ready .reveal {
  animation: reveal-up 0.85s var(--ease-out) forwards;
  animation-delay: calc(var(--d, 0) * 0.12s + 0.15s);
}

@keyframes reveal-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.15rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.85rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s, background 0.2s, border-color 0.2s;
  text-decoration: none;
}

.hero .cta-group .btn {
  padding: 0.48rem 1.05rem;
  font-size: 0.82rem;
}

.hero .cta-group .btn-primary,
.footer-cta .btn-primary {
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.28);
}

.hero .cta-group .btn-primary:hover,
.footer-cta .btn-primary:hover {
  box-shadow: 0 6px 18px rgba(217, 119, 6, 0.38);
}

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

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.28);
}

.btn-primary:hover {
  background: var(--accent-light);
  color: var(--white);
  box-shadow: 0 6px 18px rgba(217, 119, 6, 0.38);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border-color: var(--white);
}

/* —— 内容区块 —— */
.section {
  padding: 4.5rem 0;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  color: var(--white);
  margin: 0 0 0.55rem;
}

.section-desc {
  color: rgba(255, 255, 255, 0.72);
  margin: 0 0 2.25rem;
  max-width: 36rem;
  font-size: 1.02rem;
}

/* 服务区 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.15rem;
}

.service-link {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.55rem 1.5rem 1.35rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  color: var(--white);
  transition: background 0.3s, transform 0.3s var(--ease-out), border-color 0.3s, box-shadow 0.3s;
  backdrop-filter: blur(8px);
  overflow: hidden;
  min-height: 168px;
}

.service-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.35s var(--ease-out);
}

.service-link:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-4px);
  color: var(--white);
  border-color: rgba(217, 119, 6, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18);
}

.service-link:hover::before {
  transform: scaleY(1);
}

.service-link__index {
  font-family: var(--font-serif);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--accent-light);
  opacity: 0.75;
  margin-bottom: 0.65rem;
}

.service-link h3 {
  font-family: var(--font-serif);
  font-size: 1.18rem;
  margin: 0 0 0.5rem;
  color: var(--white);
}

.service-link p {
  margin: 0;
  font-size: 0.92rem;
  opacity: 0.82;
  flex: 1;
}

.service-link__more {
  margin-top: 1rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-light);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.3s, transform 0.3s var(--ease-out);
}

.service-link:hover .service-link__more {
  opacity: 1;
  transform: translateX(0);
}

/* 流程步骤 */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
  counter-reset: step;
  position: relative;
}

.step {
  color: rgba(255, 255, 255, 0.9);
  padding: 0.25rem 0.5rem 0.25rem 0;
  position: relative;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 0.55rem;
  letter-spacing: 0.04em;
  line-height: 1;
}

.step h4 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.step p {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.75;
  line-height: 1.55;
}

/* 信任短句 */
.trust-list {
  list-style: none;
  padding: 1.5rem 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.trust-list li {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.02rem;
  font-family: var(--font-serif);
  padding-left: 1.35rem;
  position: relative;
}

.trust-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 12px;
  height: 2px;
  background: var(--accent);
}

/* 页尾 CTA */
.footer-cta {
  text-align: center;
  padding: 4rem 0 2rem;
}

.footer-cta p {
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.5vw, 1.55rem);
  margin: 0 0 1.75rem;
}

/* —— 内页氛围减弱 —— */
.page-inner .site-bg__shield {
  opacity: 0.28;
  width: min(38vw, 400px);
  top: 10%;
  right: 2%;
}

.page-inner .site-bg__grid {
  opacity: 0.45;
}

/* —— 内页（浅色内容卡） —— */
.page-hero {
  padding: 3.25rem 0 2.25rem;
  color: var(--white);
  max-width: 40rem;
}

.page-hero .eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 0.75rem;
  opacity: 0;
  transform: translateY(14px);
}

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 4vw, 2.65rem);
  margin: 0 0 0.65rem;
  line-height: 1.2;
  opacity: 0;
  transform: translateY(18px);
}

.page-hero p {
  opacity: 0;
  transform: translateY(14px);
  margin: 0;
  max-width: 36rem;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.65;
}

.page-hero.is-ready .eyebrow,
.page-hero.is-ready h1,
.page-hero.is-ready p {
  animation: reveal-up 0.8s var(--ease-out) forwards;
}

.page-hero.is-ready .eyebrow { animation-delay: 0.08s; }
.page-hero.is-ready h1 { animation-delay: 0.16s; }
.page-hero.is-ready p { animation-delay: 0.28s; }

.content-stack {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  margin-bottom: 1rem;
}

.content-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  margin-bottom: 0;
  box-shadow: 0 4px 24px rgba(11, 58, 92, 0.08);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s;
  border: 1px solid rgba(11, 58, 92, 0.04);
}

.content-card + .content-card {
  margin-top: 1.15rem;
}

.content-stack .content-card + .content-card {
  margin-top: 0;
}

.content-stack .content-card {
  margin-bottom: 0;
}

.content-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(11, 58, 92, 0.12);
}

.content-card h2 {
  font-family: var(--font-serif);
  color: var(--brand);
  font-size: 1.2rem;
  margin: 0 0 0.85rem;
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
}

.content-card h2 .card-index {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-family: var(--font-sans);
  font-weight: 600;
}

.content-card ul {
  padding-left: 1.15rem;
  margin: 0;
}

.content-card li {
  margin-bottom: 0.55rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.content-card li:last-child {
  margin-bottom: 0;
}

.content-card p {
  color: var(--text-muted);
  margin: 0 0 0.75rem;
  line-height: 1.65;
}

.content-card p:last-child {
  margin-bottom: 0;
}

.content-card .note {
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  opacity: 0.85;
}

.content-card .btn-ghost {
  border-color: rgba(11, 58, 92, 0.22);
  color: var(--brand);
}

.content-card .btn-ghost:hover {
  background: rgba(11, 58, 92, 0.06);
  border-color: var(--brand);
  color: var(--brand);
}

.faq-item {
  padding: 1rem 0;
  border-bottom: 1px solid #e8edf2;
}

.faq-item:first-child {
  padding-top: 0;
}

.faq-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.faq-item strong {
  display: block;
  color: var(--brand);
  font-family: var(--font-serif);
  font-size: 1.02rem;
  margin-bottom: 0.4rem;
}

.faq-item p {
  margin: 0;
}

.price-table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.price-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.price-table th,
.price-table td {
  padding: 0.95rem 1rem;
  border-bottom: 1px solid #e8edf2;
  text-align: left;
}

.price-table th {
  background: var(--bg);
  color: var(--brand);
  font-weight: 600;
}

.price-table tbody tr {
  transition: background 0.2s ease;
}

.price-table tbody tr:hover {
  background: rgba(11, 58, 92, 0.035);
}

.price-table td:last-child {
  color: var(--accent);
  font-weight: 700;
  white-space: nowrap;
}

.price-grid {
  display: none;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.case-card {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.55rem 1.5rem;
  box-shadow: 0 4px 16px rgba(11, 58, 92, 0.06);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s, border-color 0.3s;
  border: 1px solid rgba(11, 58, 92, 0.05);
  position: relative;
  overflow: hidden;
}

.case-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.35s var(--ease-out);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(11, 58, 92, 0.12);
  border-color: rgba(217, 119, 6, 0.25);
}

.case-card:hover::before {
  transform: scaleY(1);
}

.case-card h3 {
  font-size: 1.05rem;
  font-family: var(--font-serif);
  color: var(--brand);
  margin: 0 0 0.55rem;
}

.case-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.case-card .tag {
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

a.article-card,
a.content-card.article-card {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s;
}
a.article-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(11, 58, 92, 0.1);
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.entry-link {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.1rem 1.15rem;
  border-radius: 10px;
  border: 1px solid rgba(11, 58, 92, 0.12);
  background: rgba(11, 58, 92, 0.03);
  color: var(--brand);
  text-align: left;
  font: inherit;
  cursor: pointer;
  width: 100%;
  transition: transform 0.25s var(--ease-out), border-color 0.25s, background 0.25s, box-shadow 0.25s;
}

a.entry-link {
  text-decoration: none;
}

.entry-link:hover {
  transform: translateY(-2px);
  border-color: rgba(217, 119, 6, 0.45);
  background: rgba(217, 119, 6, 0.06);
  color: var(--brand);
  box-shadow: 0 8px 20px rgba(11, 58, 92, 0.08);
}

.entry-link strong {
  font-size: 0.98rem;
}

.entry-link span {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 400;
}

.contact-form label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid #dde4ea;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #fff;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(11, 58, 92, 0.12);
}

.contact-form textarea {
  min-height: 110px;
  resize: vertical;
}

.contact-form .nd-select {
  width: 100%;
  margin-bottom: 1rem;
}
.contact-form .form-msg {
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 1rem;
  opacity: 0;
  transform: translateY(10px);
}

.page-hero.is-ready .breadcrumb {
  animation: reveal-up 0.7s var(--ease-out) 0.02s forwards;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
}

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

.breadcrumb span {
  opacity: 0.5;
}

/* —— 页脚 —— */
.site-footer {
  background: rgba(7, 42, 68, 0.95);
  color: rgba(255, 255, 255, 0.7);
  padding: 2.5rem 1.25rem;
  text-align: center;
  font-size: 0.85rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
  transition: color 0.2s;
}

.site-footer a:hover {
  color: var(--accent-light);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 1.5rem;
  margin-bottom: 1rem;
}

.footer-icp {
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
}

.footer-icp a {
  color: rgba(255, 255, 255, 0.55);
}

.footer-icp a:hover {
  color: rgba(255, 255, 255, 0.9);
}

/* —— 自定义下拉 —— */
.nd-select {
  position: relative;
  display: inline-block;
  vertical-align: middle;
}

.nd-select-native {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.nd-select__trigger {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem;
  width: 100%;
  margin: 0;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s, color 0.2s;
}

.nd-select__trigger:focus {
  outline: none;
}

.nd-select__value {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nd-select__chevron {
  flex-shrink: 0;
  width: 0.55rem;
  height: 0.55rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translate(-1px, -2px);
  opacity: 0.7;
  transition: transform 0.25s var(--ease-out);
}

.nd-select.is-open .nd-select__chevron {
  transform: rotate(225deg) translate(-1px, -1px);
}

.nd-select__menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 120;
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  border-radius: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.98);
  transform-origin: top center;
  transition: opacity 0.2s var(--ease-out), transform 0.2s var(--ease-out), visibility 0.2s;
  max-height: 260px;
  overflow: auto;
}

.nd-select.is-open .nd-select__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.nd-select__option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.55rem 0.7rem;
  border-radius: 7px;
  font-size: 0.88rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.nd-select__option::after {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  border: 1.5px solid transparent;
  flex-shrink: 0;
}

.nd-select__option.is-selected::after {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: inset 0 0 0 2px #fff;
}

/* 顶栏深色 */
.nd-select--dark .nd-select__trigger {
  min-width: 7.2rem;
  padding: 0.32rem 0.7rem;
  font-size: 0.8rem;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
}

.nd-select--dark .nd-select__trigger:hover,
.nd-select--dark.is-open .nd-select__trigger {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(245, 158, 11, 0.55);
}

.nd-select--dark .nd-select__trigger:focus-visible {
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.28);
}

.nd-select--dark .nd-select__menu {
  min-width: 100%;
  background: #0b3a5c;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.28);
}

.nd-select--dark .nd-select__option {
  color: rgba(255, 255, 255, 0.88);
}

.nd-select--dark .nd-select__option:hover,
.nd-select--dark .nd-select__option.is-active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.nd-select--dark .nd-select__option.is-selected {
  background: rgba(217, 119, 6, 0.18);
  color: var(--accent-light);
}

/* 表单浅色 */
.nd-select--light {
  display: block;
}

.nd-select--light .nd-select__trigger {
  padding: 0.7rem 0.9rem;
  font-size: 0.95rem;
  color: var(--text);
  background: #fff;
  border: 1px solid #dde4ea;
  border-radius: 8px;
}

.nd-select--light .nd-select__trigger:hover,
.nd-select--light.is-open .nd-select__trigger {
  border-color: rgba(11, 58, 92, 0.35);
}

.nd-select--light .nd-select__trigger:focus-visible,
.nd-select--light.is-open .nd-select__trigger {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(11, 58, 92, 0.12);
}

.nd-select--light .nd-select__menu {
  background: #fff;
  border: 1px solid #e4ebf1;
  box-shadow: 0 12px 32px rgba(11, 58, 92, 0.12);
}

.nd-select--light .nd-select__option {
  color: var(--text);
}

.nd-select--light .nd-select__option:hover,
.nd-select--light .nd-select__option.is-active {
  background: rgba(11, 58, 92, 0.06);
}

.nd-select--light .nd-select__option.is-selected {
  background: rgba(217, 119, 6, 0.1);
  color: var(--brand);
  font-weight: 600;
}

/* —— 语言切换 —— */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.lang-switch-label {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.8rem;
  white-space: nowrap;
}

.lang-switch .nd-select {
  min-width: 7.2rem;
}

/* —— 滚动显现 / 错落 —— */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
  transition-delay: 0s;
}

.fade-in.visible .stagger > *,
.stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
  transition-delay: calc(var(--i, 0) * 0.09s + 0.08s);
}

/* —— PC 增强 —— */
@media (min-width: 769px) {
  .mobile-cta-bar {
    display: none;
  }

  :root {
    --content-max: 1180px;
    --header-h: 70px;
  }

  .hero {
    max-width: 42rem;
    padding: 4rem 0 6rem;
  }

  .services-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 1.25rem;
  }

  .services-grid .service-link:nth-child(1),
  .services-grid .service-link:nth-child(2),
  .services-grid .service-link:nth-child(3) {
    grid-column: span 2;
  }

  .services-grid .service-link:nth-child(4),
  .services-grid .service-link:nth-child(5) {
    grid-column: span 3;
  }

  .steps {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    padding-top: 0.5rem;
  }

  .steps::before {
    content: "";
    position: absolute;
    top: 1.15rem;
    left: 2%;
    right: 8%;
    height: 1px;
    background: linear-gradient(90deg, rgba(217, 119, 6, 0.55), rgba(255, 255, 255, 0.12));
    pointer-events: none;
  }

  .step {
    padding: 0 1.25rem 0 0;
  }

  .step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 1.05rem;
    right: 12%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.7;
  }

  .section {
    padding: 5.5rem 0;
  }

  .site-bg__shield {
    right: 4%;
    top: 6%;
    width: min(42vw, 560px);
  }
}

@media (min-width: 1200px) {
  .hero {
    max-width: 46rem;
  }

  .hero-brand {
    font-size: 5rem;
  }

  .site-bg__shield {
    right: 6%;
    opacity: 0.62;
  }
}

/* —— 响应式 —— */
@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    min-height: auto;
    padding: 2.5rem 0 3.5rem;
    max-width: none;
  }

  .hero-scroll {
    display: none;
  }

  .site-bg__shield {
    width: 70vw;
    right: -18%;
    top: 4%;
    opacity: 0.28;
  }

  .cta-group {
    width: 100%;
  }

  .btn {
    flex: 1;
    min-width: 140px;
  }

  .mobile-cta-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(11, 58, 92, 0.96);
    backdrop-filter: blur(8px);
    z-index: 99;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .mobile-cta-bar .btn {
    flex: 1;
    padding: 0.55rem 0.75rem;
    font-size: 0.82rem;
  }

  main {
    padding-bottom: 5.5rem;
  }

  .site-footer {
    padding-bottom: 5.5rem;
  }

  .lang-switch-label {
    display: none;
  }

  .service-link__more {
    opacity: 0.85;
    transform: none;
  }
}

/* 减弱动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .fade-in,
  .stagger > *,
  .page-hero .eyebrow,
  .page-hero h1,
  .page-hero p,
  .page-hero .breadcrumb {
    opacity: 1;
    transform: none;
    animation: none !important;
  }
}

@media (min-width: 769px) {
  .page-inner .site-bg__shield {
    opacity: 0.32;
    width: min(34vw, 420px);
  }

  .content-card {
    padding: 2rem 2.15rem;
  }

  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}