:root {
  --bg: #f4f6fa;
  --bg-soft: #eef1f7;
  --fg: #16202f;
  --muted: #5f6b7d;
  --line: rgba(22, 32, 47, 0.09);
  --card: rgba(255, 255, 255, 0.72);
  --card-solid: #ffffff;
  --brand: #1b2f4b;
  --brand2: #2f6fb0;
  --brand3: #5b93d3;
  --accent: #c9a227;
  --accent2: #e3c25a;
  --glass: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.65);
  --shadow: 0 10px 34px rgba(20, 35, 60, 0.09);
  --shadow-hover: 0 18px 46px rgba(20, 35, 60, 0.16);
  --radius: 18px;
  --radius-sm: 12px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

html[data-theme="dark"] {
  --bg: #0c1524;
  --bg-soft: #0f1b2d;
  --fg: #e8edf5;
  --muted: #9aa7ba;
  --line: rgba(232, 237, 245, 0.1);
  --card: rgba(21, 34, 56, 0.66);
  --card-solid: #152238;
  --brand: #4a7fc1;
  --brand2: #7aa8de;
  --brand3: #5b93d3;
  --accent: #e0bd4a;
  --accent2: #f0d783;
  --glass: rgba(21, 34, 56, 0.55);
  --glass-border: rgba(255, 255, 255, 0.12);
  --shadow: 0 10px 34px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 18px 46px rgba(0, 0, 0, 0.6);
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(47, 111, 176, 0.1), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(201, 162, 39, 0.08), transparent 55%),
    var(--bg);
  color: var(--fg);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}

a {
  color: var(--brand2);
  text-decoration: none;
  transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

a:hover {
  text-decoration: underline;
}

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

h1, h2, h3, h4 {
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: 0.2px;
}

p {
  word-break: break-word;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
}

.skip:focus {
  left: 12px;
  top: 12px;
  background: var(--accent);
  color: #111;
  padding: 10px 16px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

/* ============ 顶部信息条 ============ */
.topbar {
  background: linear-gradient(90deg, #16263f, #1f3a5f 55%, #2f6fb0);
  color: #dbe6f5;
  font-size: 13px;
  position: relative;
  z-index: 101;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 7px;
  padding-bottom: 7px;
}

.topbar a {
  color: #dbe6f5;
}

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

.topbar .tb-right {
  display: flex;
  gap: 18px;
  align-items: center;
}

/* ============ 导航 ============ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 24px rgba(20, 35, 60, 0.06);
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 800;
  font-size: 20px;
  color: var(--fg);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.logo svg {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(47, 111, 176, 0.28);
  transition: transform 0.4s var(--ease);
}

.logo:hover svg {
  transform: rotate(-6deg) scale(1.05);
}

.logo span small {
  display: block;
  font-size: 10.5px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 1.6px;
}

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
  flex-wrap: wrap;
}

.nav-links a {
  position: relative;
  padding: 8px 12px;
  border-radius: 10px;
  color: var(--fg);
  font-size: 15px;
  text-decoration: none;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand2), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.nav-links a:hover {
  background: rgba(47, 111, 176, 0.1);
  color: var(--brand2);
  transform: translateY(-1px);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-tools {
  display: flex;
  gap: 8px;
  align-items: center;
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--fg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s var(--ease), transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.icon-btn:hover {
  background: rgba(47, 111, 176, 0.14);
  border-color: rgba(47, 111, 176, 0.35);
  transform: translateY(-2px);
}

.icon-btn:active {
  transform: translateY(0) scale(0.96);
}

.search-box {
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 11px;
  overflow: hidden;
  background: var(--card);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.search-box:focus-within {
  border-color: var(--brand2);
  box-shadow: 0 0 0 3px rgba(47, 111, 176, 0.16);
}

.search-box input {
  border: none;
  background: transparent;
  color: var(--fg);
  padding: 9px 12px;
  font-size: 14px;
  width: 158px;
  outline: none;
}

.search-box input::placeholder {
  color: var(--muted);
}

.search-box button {
  border: none;
  background: linear-gradient(135deg, var(--brand2), var(--brand3));
  color: #fff;
  padding: 9px 14px;
  font-size: 14px;
  cursor: pointer;
  transition: filter 0.25s var(--ease);
}

.search-box button:hover {
  filter: brightness(1.1);
}

.menu-toggle {
  display: none;
}

/* ============ Banner 轮播 ============ */
.banner {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0f2138 0%, #1f3a5f 48%, #2f6fb0 82%, #3f7fc0 100%);
  color: #fff;
}

.banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 300px at 15% 20%, rgba(201, 162, 39, 0.18), transparent 60%),
    radial-gradient(700px 360px at 90% 80%, rgba(122, 168, 222, 0.22), transparent 60%);
  pointer-events: none;
}

.banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, #000 30%, transparent 75%);
  pointer-events: none;
}

.slides {
  position: relative;
  min-height: 460px;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s var(--ease), visibility 0.8s var(--ease);
  display: flex;
  align-items: center;
  padding: 64px 0;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  position: relative;
}

.slide .container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 44px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.slide h2 {
  font-size: 36px;
  line-height: 1.28;
  margin-bottom: 16px;
  font-weight: 800;
  letter-spacing: 0.4px;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.18);
}

.slide p {
  color: #d7e3f3;
  margin-bottom: 26px;
  font-size: 16px;
  max-width: 560px;
}

.slide .btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  color: #1a1a1a;
  padding: 13px 30px;
  border-radius: 40px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  box-shadow: 0 10px 26px rgba(201, 162, 39, 0.36);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), filter 0.3s var(--ease);
}

.slide .btn:hover {
  text-decoration: none;
  filter: brightness(1.06);
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(201, 162, 39, 0.46);
}

.slide-art {
  display: flex;
  justify-content: center;
  animation: floatY 6s ease-in-out infinite;
}

.slide-art svg {
  filter: drop-shadow(0 18px 40px rgba(0, 0, 0, 0.28));
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: width 0.35s var(--ease), background 0.35s var(--ease);
}

.dot:hover {
  background: rgba(255, 255, 255, 0.7);
}

.dot.active {
  background: var(--accent);
  width: 28px;
  border-radius: 6px;
}

/* ============ 面包屑 ============ */
.breadcrumb {
  padding: 18px 0;
  font-size: 13px;
  color: var(--muted);
}

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

.breadcrumb a:hover {
  color: var(--brand2);
}

/* ============ 通用区块 ============ */
section {
  padding: 60px 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 40px;
}

.section-head h2 {
  font-size: 29px;
  margin-bottom: 12px;
  background: linear-gradient(120deg, var(--fg) 30%, var(--brand2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

html[data-theme="dark"] .section-head h2 {
  background: linear-gradient(120deg, var(--fg) 30%, var(--brand3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-head p {
  color: var(--muted);
  font-size: 15.5px;
}

.card {
  background: var(--card);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(47, 111, 176, 0.32);
}

.card h3 {
  font-size: 19px;
  margin-bottom: 12px;
  color: var(--fg);
}

.card p {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 10px;
}

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

.card strong {
  color: var(--fg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

/* ============ 数字统计 ============ */
.stats {
  background: linear-gradient(135deg, #16263f, #1f3a5f 55%, #2b5f97);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.stats::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(500px 240px at 20% 10%, rgba(201, 162, 39, 0.18), transparent 60%),
    radial-gradient(600px 280px at 85% 90%, rgba(122, 168, 222, 0.2), transparent 60%);
  pointer-events: none;
}

.stats .grid-4 {
  text-align: center;
  position: relative;
  z-index: 2;
}

.stat-num {
  font-size: 40px;
  font-weight: 800;
  color: var(--accent2);
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 14px;
  color: #c8d6ea;
  margin-top: 4px;
}

/* ============ 产品/服务 ============ */
.prod {
  position: relative;
  overflow: hidden;
}

.prod::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 111, 176, 0.16), transparent 70%);
  transition: transform 0.5s var(--ease);
}

.prod:hover::before {
  transform: scale(1.5);
}

.prod h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.prod p {
  color: var(--muted);
  font-size: 15px;
}

.prod .badge {
  display: inline-block;
  font-size: 12px;
  background: rgba(47, 111, 176, 0.14);
  color: var(--brand2);
  padding: 3px 11px;
  border-radius: 20px;
  margin-bottom: 14px;
  font-weight: 600;
  letter-spacing: 0.4px;
}

html[data-theme="dark"] .prod .badge {
  background: rgba(122, 168, 222, 0.18);
  color: var(--brand3);
}

/* ============ 文章列表 ============ */
.article-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-card .meta {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 12px;
  align-items: center;
}

.article-card .meta span {
  background: rgba(201, 162, 39, 0.14);
  color: #a07d12;
  padding: 2px 10px;
  border-radius: 20px;
  font-weight: 600;
}

html[data-theme="dark"] .article-card .meta span {
  background: rgba(224, 189, 74, 0.16);
  color: var(--accent2);
}

.article-card h3 {
  font-size: 18px;
  line-height: 1.45;
  transition: color 0.25s var(--ease);
}

.article-card:hover h3 {
  color: var(--brand2);
}

.article-card p {
  color: var(--muted);
  font-size: 14px;
  flex: 1;
}

.read-more {
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.25s var(--ease), color 0.25s var(--ease);
}

.read-more:hover {
  text-decoration: none;
  gap: 10px;
  color: var(--accent);
}

/* ============ 时间线 ============ */
.timeline {
  border-left: 3px solid var(--line);
  padding-left: 26px;
  margin-left: 8px;
  margin-top: 18px;
}

.timeline li {
  list-style: none;
  margin-bottom: 22px;
  position: relative;
}

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

.timeline li::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand2), var(--accent));
  border: 3px solid var(--card-solid);
  box-shadow: 0 0 0 3px rgba(47, 111, 176, 0.16);
  transition: transform 0.3s var(--ease);
}

.timeline li:hover::before {
  transform: scale(1.25);
}

.timeline .year {
  font-weight: 800;
  color: var(--brand2);
  display: block;
  margin-bottom: 2px;
}

.timeline p {
  color: var(--muted);
  font-size: 14.5px;
  margin: 0;
}

/* ============ FAQ ============ */
.faq-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  margin-bottom: 12px;
  background: var(--card);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.faq-item:hover {
  border-color: rgba(47, 111, 176, 0.32);
}

.faq-item.open {
  border-color: rgba(47, 111, 176, 0.4);
  box-shadow: 0 8px 26px rgba(47, 111, 176, 0.12);
}

.faq-q {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--fg);
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  font-family: inherit;
  transition: background 0.25s var(--ease);
}

.faq-q:hover {
  background: rgba(47, 111, 176, 0.06);
}

.faq-q .arrow {
  transition: transform 0.35s var(--ease);
  color: var(--brand2);
  font-size: 14px;
  flex: 0 0 auto;
}

.faq-item.open .faq-q .arrow {
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
  color: var(--muted);
  font-size: 15px;
}

.faq-a .inner {
  padding: 0 22px 20px;
  line-height: 1.8;
}

/* ============ HowTo ============ */
.howto-step {
  display: flex;
  gap: 16px;
  margin-bottom: 18px;
  transition: transform 0.3s var(--ease);
}

.howto-step:hover {
  transform: translateX(4px);
}

.howto-step .num {
  flex: 0 0 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand2), var(--brand3));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  box-shadow: 0 6px 16px rgba(47, 111, 176, 0.3);
}

.howto-step h4 {
  font-size: 16px;
  margin-bottom: 4px;
}

.howto-step p {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

/* ============ 评价 ============ */
.review {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.review .avatar {
  flex: 0 0 52px;
  height: 52px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 6px 16px rgba(20, 35, 60, 0.18);
  transition: transform 0.35s var(--ease);
}

.review:hover .avatar {
  transform: scale(1.08);
}

.review .who {
  font-weight: 700;
  color: var(--fg);
}

.review .role {
  font-size: 12px;
  color: var(--muted);
}

.review .stars {
  color: var(--accent);
  font-size: 14px;
  letter-spacing: 2px;
  margin: 2px 0 6px;
}

.review p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

/* ============ 新闻 ============ */
.news-item {
  display: flex;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
  transition: transform 0.3s var(--ease);
}

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

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

.news-item:hover {
  transform: translateX(4px);
}

.news-item h3 {
  font-size: 16.5px;
  margin-bottom: 4px;
}

.news-item p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.news-date {
  flex: 0 0 84px;
  text-align: center;
  background: linear-gradient(135deg, rgba(47, 111, 176, 0.12), rgba(201, 162, 39, 0.1));
  border-radius: 12px;
  padding: 10px 0;
  align-self: flex-start;
}

.news-date .d {
  font-size: 22px;
  font-weight: 800;
  color: var(--brand2);
  line-height: 1.2;
}

.news-date .m {
  font-size: 12px;
  color: var(--muted);
}

/* ============ 表格 ============ */
.card table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.card th,
.card td {
  padding: 13px 14px;
  border: 1px solid var(--line);
  text-align: left;
}

.card th {
  background: linear-gradient(135deg, rgba(47, 111, 176, 0.12), rgba(47, 111, 176, 0.05));
  font-weight: 700;
  color: var(--fg);
}

.card tbody tr {
  transition: background 0.25s var(--ease);
}

.card tbody tr:hover {
  background: rgba(47, 111, 176, 0.06);
}

/* ============ 联系 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 14px;
  margin-bottom: 18px;
  align-items: flex-start;
}

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

.contact-item .ic {
  flex: 0 0 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(47, 111, 176, 0.16), rgba(201, 162, 39, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand2);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.contact-item:hover .ic {
  transform: rotate(-6deg) scale(1.06);
}

.contact-item strong {
  display: block;
  font-size: 15px;
  color: var(--fg);
  margin-bottom: 2px;
}

.contact-item span {
  color: var(--muted);
  font-size: 14px;
}

/* ============ 页脚 ============ */
footer {
  background: linear-gradient(160deg, #101d30, #16263f 50%, #1b2f4b);
  color: #c8d6ea;
  padding: 52px 0 26px;
  font-size: 14px;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 111, 176, 0.22), transparent 70%);
  pointer-events: none;
}

footer .container {
  position: relative;
  z-index: 2;
}

footer h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 14px;
  letter-spacing: 0.4px;
}

footer p {
  margin-bottom: 6px;
  color: #b7c6db;
}

footer a {
  color: #c8d6ea;
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

footer a:hover {
  color: var(--accent2);
  text-decoration: none;
  padding-left: 3px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 32px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  margin-top: 36px;
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: #9fb2cc;
}

.sitemap-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 10px;
}

.sitemap-links a {
  font-size: 13px;
}

/* ============ 返回顶部 ============ */
#toTop {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand2), var(--brand3));
  color: #fff;
  border: none;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 28px rgba(47, 111, 176, 0.42);
  z-index: 200;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

#toTop.show {
  display: flex;
  animation: popIn 0.35s var(--ease);
}

#toTop:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 16px 36px rgba(47, 111, 176, 0.55);
}

@keyframes popIn {
  from { opacity: 0; transform: scale(0.6); }
  to { opacity: 1; transform: scale(1); }
}

/* ============ 滚动动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
  will-change: opacity, transform;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

.grid-3 .reveal:nth-child(2),
.grid-4 .reveal:nth-child(2) {
  transition-delay: 0.08s;
}

.grid-3 .reveal:nth-child(3),
.grid-4 .reveal:nth-child(3) {
  transition-delay: 0.16s;
}

.grid-4 .reveal:nth-child(4) {
  transition-delay: 0.24s;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .slide h2 {
    font-size: 30px;
  }
}

@media (max-width: 900px) {
  section {
    padding: 46px 0;
  }
  .slides {
    min-height: auto;
  }
  .slide {
    padding: 48px 0 64px;
  }
  .slide .container {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .slide-art {
    display: none;
  }
  .slide h2 {
    font-size: 26px;
  }
  .grid-3,
  .grid-2,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-solid);
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    border-radius: 0 0 16px 16px;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    padding: 11px 14px;
  }
  .nav-links a::after {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .search-box input {
    width: 110px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .card {
    padding: 22px;
  }
  .card table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }
  .topbar .tb-right {
    display: none;
  }
  .topbar {
    font-size: 12px;
  }
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .search-box {
    display: none;
  }
  .slide h2 {
    font-size: 23px;
  }
  .slide p {
    font-size: 14.5px;
  }
  .stat-num {
    font-size: 32px;
  }
  .news-item {
    gap: 12px;
  }
  .news-date {
    flex: 0 0 70px;
  }
  .card {
    padding: 18px;
  }
  .section-head h2 {
    font-size: 21px;
  }
  #toTop {
    right: 14px;
    bottom: 14px;
    width: 44px;
    height: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  .nav,
  .topbar,
  .banner,
  #toTop,
  footer {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  .card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}