/* 泰仓科技 - 企业门户网站样式 */
/* 参考 taicang-website 风格：深色 Hero + 网格纹理 + 卡片悬浮上浮 */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700&family=Noto+Sans+SC:wght@300;400;500;600&display=swap');

/* CSS变量 */
:root {
  --blue:       #3A96B5;
  --blue-dark:  #2a7a96;
  --blue-deep:  #1a5f78;
  --blue-light: #6bb8d0;
  --blue-pale:  #e8f5f9;
  --green:      #4aab6d;
  --green-dark: #357a4f;
  --green-pale: #eaf6ef;
  --ink:        #0f1f2a;
  --ink-mid:    #2c4a5a;
  --ink-soft:   #5a7a8a;
  --line:       #d8eaf0;
  --white:      #ffffff;
  --off-white:  #f7fbfd;
  --shadow-sm:  0 2px 12px rgba(58,150,181,.10);
  --shadow-md:  0 8px 32px rgba(58,150,181,.15);
  --shadow-lg:  0 20px 60px rgba(58,150,181,.18);
  --radius:     12px;
  --radius-lg:  20px;
  --font-serif: 'Noto Serif SC', serif;
  --font-sans:  'Noto Sans SC', sans-serif;
  --nav-h:      72px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

/* 重置样式 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--off-white); }
::-webkit-scrollbar-thumb { background: var(--blue-light); border-radius: 3px; }

/* ==================== 导航栏 ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 0 5%;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(58,150,181,.12);
  transition: box-shadow var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: .9rem;
  font-weight: 700;
  font-family: var(--font-serif);
  letter-spacing: -.02em;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
}

.logo-text span {
  color: var(--blue);
}

.logo-img {
  height: 36px;
  width: auto;
  display: block;
}

.footer-logo-img {
  height: 32px;
  width: auto;
  display: block;
}

/* 导航链接 */
.nav {
  display: flex;
  align-items: center;
  gap: 0;
  margin: 0 auto;
}

.nav-item {
  padding: 0 18px;
  font-size: .875rem;
  font-weight: 500;
  color: var(--ink-mid);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  position: relative;
  transition: color var(--transition);
}

.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 18px;
  right: 18px;
  height: 2px;
  background: var(--blue);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.nav-item:hover {
  color: var(--blue);
}

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

.nav-item.active {
  color: var(--blue);
  font-weight: 700;
}

.nav-item.active::after {
  transform: scaleX(1);
}

/* CTA按钮 */
.header-right {
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: .875rem;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--blue);
  color: white;
}

.btn-primary:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(58,150,181,.4);
}

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

.btn-outline:hover {
  background: var(--blue);
  color: white;
}

/* 移动端菜单按钮 */
.nav-mobile-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-mobile-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: var(--transition);
}

/* ==================== Hero Banner ==================== */
.banner {
  margin-top: var(--nav-h);
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--ink);
}

/* 背景层 */
.banner-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 50%, rgba(58,150,181,.22) 0%, transparent 60%),
    radial-gradient(ellipse 50% 80% at 20% 80%, rgba(74,171,109,.12) 0%, transparent 50%),
    linear-gradient(160deg, #0a1a24 0%, #0f2535 40%, #0d2030 100%);
}

/* 网格纹理 */
.banner-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(58,150,181,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58,150,181,.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 60% 50%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 60% 50%, black 30%, transparent 80%);
}

/* 装饰圆环 */
.banner-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(58,150,181,.15);
  animation: ringPulse 6s ease-in-out infinite;
}

.banner-ring:nth-child(1) {
  width: 500px;
  height: 500px;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  animation-delay: 0s;
}

.banner-ring:nth-child(2) {
  width: 700px;
  height: 700px;
  right: 3%;
  top: 50%;
  transform: translateY(-50%);
  animation-delay: 1s;
}

.banner-ring:nth-child(3) {
  width: 900px;
  height: 900px;
  right: 1%;
  top: 50%;
  transform: translateY(-50%);
  animation-delay: 2s;
}

@keyframes ringPulse {
  0%, 100% { opacity: .4; }
  50% { opacity: .8; }
}

/* Banner 内容 */
.banner-content {
  position: relative;
  z-index: 2;
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(58,150,181,.15);
  border: 1px solid rgba(58,150,181,.3);
  border-radius: 100px;
  font-size: .75rem;
  font-weight: 500;
  color: var(--blue-light);
  letter-spacing: .05em;
  margin-bottom: 24px;
}

.banner-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--blue-light);
  border-radius: 50%;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: .3; }
}

.banner-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  color: white;
  line-height: 1.25;
  margin-bottom: 20px;
}

.banner-title em {
  font-style: normal;
  color: var(--blue-light);
  position: relative;
}

.banner-title em::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue-light), transparent);
}

.banner-slogan {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--blue-light);
  letter-spacing: 0.15em;
  margin: 8px 0 12px;
}

.banner-subtitle {
  font-size: 1rem;
  font-weight: 300;
  color: rgba(255,255,255,.65);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 480px;
}

.banner-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-banner-primary {
  padding: 13px 30px;
  background: var(--blue);
  color: white;
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 500;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
}

.btn-banner-primary:hover {
  background: var(--blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(58,150,181,.4);
}

.btn-banner-outline {
  padding: 13px 30px;
  background: transparent;
  color: white;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 400;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-family: var(--font-sans);
}

.btn-banner-outline:hover {
  border-color: rgba(255,255,255,.7);
  background: rgba(255,255,255,.06);
  transform: translateY(-2px);
}

.banner-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,.1);
}

.banner-stat-num {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: white;
  line-height: 1;
}

.banner-stat-num span {
  color: var(--blue-light);
  font-size: 1rem;
}

.banner-stat-label {
  font-size: .75rem;
  color: rgba(255,255,255,.5);
  margin-top: 4px;
}

/* 右侧平台卡片 */
.banner-visual {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  max-width: 520px;
}

.platforms-header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .72rem;
  font-weight: 600;
  color: rgba(255,255,255,.5);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.platforms-header svg {
  opacity: .7;
}

.platforms-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}

.platform-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all .25s ease;
}

.platform-card:hover {
  background: rgba(255,255,255,.1);
  border-color: rgba(58,150,181,.5);
  transform: translateX(4px);
}

.platform-icon {
  width: 38px;
  height: 38px;
  background: rgba(58,150,181,.18);
  border: 1px solid rgba(58,150,181,.3);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--blue-light);
}

.platform-name {
  font-size: .88rem;
  font-weight: 600;
  color: rgba(255,255,255,.92);
  white-space: nowrap;
}

.platform-desc {
  font-size: .7rem;
  color: rgba(255,255,255,.45);
  margin-left: auto;
  text-align: right;
  white-space: nowrap;
}

/* .platforms-tech {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: .65rem;
  color: rgba(255,255,255,.38);
  padding-top: 2px;
  border-top: 1px solid rgba(255,255,255,.07);
  padding-top: 10px;
} */

/* ==================== 通用区块 ==================== */
.section {
  padding: 96px 5%;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .75rem;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-tag::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--blue);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-title em {
  font-style: normal;
  color: var(--blue);
}

.section-desc {
  font-size: .95rem;
  color: var(--ink-soft);
  max-width: 560px;
  line-height: 1.8;
}

/* 灰色背景区块 */
.section-gray {
  background: var(--off-white);
}

/* 深色背景区块 */
.section-dark {
  background: var(--ink);
  color: white;
}

.section-dark .section-title {
  color: white;
}

.section-dark .section-desc {
  color: rgba(255,255,255,.6);
}

.section-dark .section-tag {
  color: var(--blue-light);
}

.section-dark .section-tag::before {
  background: var(--blue-light);
}

/* ==================== 关于我们 ==================== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 48px;
}

.about-text h3 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 20px;
  line-height: 1.3;
}

.about-text p {
  font-size: .95rem;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-image {
  height: 360px;
  /* background: linear-gradient(135deg, var(--blue) 0%, var(--dark) 100%); */
  background: var(--blue);
  /* color: var(--blue); */
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.about-image-placeholder {
  text-align: center;
  color: rgba(255,255,255,.6);
  font-size: 3rem;
  position: relative;
  z-index: 1;
}

.about-real-img {
  width: 100%;
  height: auto;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius-lg);
  position: relative;
  z-index: 1;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 64px;
}

.stat-item {
  background: white;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.stat-item:hover::before {
  transform: scaleX(1);
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: .85rem;
  color: var(--ink-soft);
}

/* ==================== 产品服务 ==================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.product-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  text-align: center;
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: var(--blue-pale);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.product-card:hover .product-icon {
  background: var(--blue);
}

.product-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--blue);
  fill: none;
  transition: stroke var(--transition);
}

.product-card:hover .product-icon svg {
  stroke: white;
}

.product-card h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.product-card p {
  font-size: .85rem;
  color: var(--ink-soft);
  line-height: 1.7;
}



/* ==================== 解决方案 ==================== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.solution-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  position: relative;
  transition: all var(--transition);
}

.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.solution-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.solution-card:hover::before {
  transform: scaleX(1);
}

.solution-header {
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.solution-header img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.solution-header svg {
  width: 56px;
  height: 56px;
  stroke: var(--blue);
  fill: none;
  position: relative;
  z-index: 1;
}

.solution-body {
  /* display: flex;
  flex-direction: column;
  justify-content: between; */
  height: 200px;
  padding: 28px 20px;
}

.solution-body h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.solution-body p {
  font-size: .85rem;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 16px;
}

.solution-link {
  font-size: .875rem;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  transition: gap var(--transition);
}

.solution-link:hover {
  color: var(--blue-dark);
  gap: 10px;
}

/* ==================== 客户案例 ==================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.client-item img {
  width: 100%;
  height: 120px;
  object-fit: contain;
  transition: transform var(--transition);
}

.client-item:hover img {
  transform: scale(1.1);
}

.client-item {
  height: 170px;
  background: white;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
  padding: 8px 0px;
  gap: 0px;
}

.client-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.client-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.client-item:hover::before {
  transform: scaleX(1);
}

.client-name {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-align: center;
  line-height: 1.4;
}

/* ==================== 新闻动态 ==================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 48px;
}

.news-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  position: relative;
  transition: all var(--transition);
}

.news-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  z-index: 1;
}

.news-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.news-card:hover::before {
  transform: scaleX(1);
}

.news-image {
  height: 200px;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.news-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.news-image svg {
  width: 48px;
  height: 48px;
  stroke: rgba(255,255,255,.5);
  position: relative;
  z-index: 1;
}

.news-content {
  padding: 24px;
}

.news-date {
  font-size: .78rem;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.news-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.5;
}

.news-excerpt {
  font-size: .85rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ==================== 联系我们 ==================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-top: 48px;
}

.contact-info h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 30px;
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--blue-pale);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition);
}

.contact-item:hover .contact-icon {
  background: var(--blue);
}

.contact-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--blue);
  fill: none;
  transition: stroke var(--transition);
}

.contact-item:hover .contact-icon svg {
  stroke: white;
}

.contact-text h5 {
  font-size: .95rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.contact-text p {
  font-size: .875rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* 联系表单 */
.contact-form {
  background: var(--off-white);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--line);
}

.contact-form h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: .875rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: .875rem;
  font-family: var(--font-sans);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(58,150,181,.12);
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-submit {
  width: 100%;
  padding: 14px;
  background: var(--blue);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
}

.form-submit:hover {
  background: var(--blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(58,150,181,.3);
}

/* ==================== CTA 区域 ==================== */
.cta-band {
  background: linear-gradient(135deg, var(--blue-deep) 0%, var(--blue) 50%, var(--blue-dark) 100%);
  padding: 80px 5%;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M0 0h40v40H0V0zm40 40h40v40H40V40zm0-40h2l-2 2V0zm0 4l4-4h2l-6 6V4zm0 4l8-8h2L40 10V8zm0 4L52 0h2L40 14v-2zm0 4L56 0h2L40 18v-2zm0 4L60 0h2L40 22v-2zm0 4L64 0h2L40 26v-2zm0 4L68 0h2L40 30v-2zm0 4L72 0h2L40 34v-2zm0 4L76 0h2L40 38v-2zm0 4L80 0v2L42 40h-2zm4 0L80 4v2L46 40h-2zm4 0L80 8v2L50 40h-2zm4 0l28-28v2L54 40h-2zm4 0l24-24v2L58 40h-2zm4 0l20-20v2L62 40h-2zm4 0l16-16v2L66 40h-2zm4 0l12-12v2L70 40h-2zm4 0l8-8v2l-6 6h-2zm4 0l4-4v2l-2 2h-2z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-band-inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.cta-band-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
}

.cta-band-desc {
  font-size: .95rem;
  color: rgba(255,255,255,.75);
  margin-bottom: 36px;
  line-height: 1.8;
}

.cta-band-btns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-white {
  padding: 13px 30px;
  background: white;
  color: var(--blue-deep);
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 600;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,.2);
}

.btn-ghost {
  padding: 13px 30px;
  background: transparent;
  color: white;
  border: 1px solid rgba(255,255,255,.4);
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 400;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-family: var(--font-sans);
}

.btn-ghost:hover {
  border-color: white;
  background: rgba(255,255,255,.1);
  transform: translateY(-2px);
}

/* ==================== 页脚 ==================== */
.footer {
  background: var(--ink);
  color: rgba(255,255,255,.6);
  padding: 64px 5% 0;
}

.footer-main {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.footer-brand {
  max-width: 280px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: .9rem;
  font-weight: 700;
  font-family: var(--font-serif);
}

.footer-logo-text {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: white;
}

.footer-slogan {
  font-size: .875rem;
  line-height: 1.8;
  margin-bottom: 20px;
  color: rgba(255,255,255,.5);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  margin-bottom: 8px;
}

.footer-contact-item span:first-child {
  color: var(--blue-light);
}

.footer-col-title {
  font-size: .875rem;
  font-weight: 600;
  color: white;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: .82rem;
  color: rgba(255,255,255,.5);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--blue-light);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .78rem;
}

.footer-copyright {
  color: rgba(255,255,255,.35);
}

.footer-icp a {
  color: rgba(255,255,255,.35);
  transition: color var(--transition);
}

.footer-icp a:hover {
  color: var(--blue-light);
}

/* ==================== 内页 Banner ==================== */
.page-banner {
  margin-top: var(--nav-h);
  min-height: 360px;
  background: var(--ink);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 50% 50%, rgba(58,150,181,.15) 0%, transparent 70%),
    linear-gradient(160deg, #0a1a24 0%, #0f2535 100%);
}

.page-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(58,150,181,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58,150,181,.05) 1px, transparent 1px);
  background-size: 60px 60px;
}

.page-banner-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  width: 100%;
  padding: 80px 5%;
}

.page-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
}

.page-subtitle {
  font-size: 1rem;
  color: rgba(255,255,255,.6);
}

/* ==================== 滚动动画 ==================== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}

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

.fade-up:nth-child(2) { transition-delay: .1s; }
.fade-up:nth-child(3) { transition-delay: .2s; }
.fade-up:nth-child(4) { transition-delay: .3s; }
.fade-up:nth-child(5) { transition-delay: .4s; }

/* ==================== 移动端导航菜单 ==================== */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(15,31,42,.97);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  font-size: 1.2rem;
  font-weight: 500;
  color: rgba(255,255,255,.8);
  padding: 12px 24px;
  transition: color var(--transition);
}

.mobile-nav a:hover {
  color: var(--blue-light);
}

.mobile-nav-close {
  position: absolute;
  top: 20px;
  right: 5%;
  font-size: 1.5rem;
  color: white;
  cursor: pointer;
  background: none;
  border: none;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .banner-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .banner-visual {
    display: none;
  }

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

@media (max-width: 768px) {
  :root {
    --nav-h: 60px;
  }

  .nav,
  .header-right {
    display: none;
  }

  .nav-mobile-btn {
    display: flex;
  }

  .banner {
    min-height: auto;
    padding: 60px 0;
  }

  .banner-stats {
    gap: 20px;
  }

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

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

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

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

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

  .about-content {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ==================== 产品服务 - 五大核心平台概览 ==================== */
.platforms-overview-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.overview-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  border: 1px solid var(--line);
  position: relative;
  transition: all var(--transition);
  overflow: hidden;
}

.overview-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.overview-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.overview-card:hover::before {
  transform: scaleX(1);
}

.overview-icon {
  width: 56px;
  height: 56px;
  background: var(--blue-pale);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: background var(--transition);
}

.overview-card:hover .overview-icon {
  background: var(--blue);
}

.overview-icon svg {
  stroke: var(--blue);
  transition: stroke var(--transition);
}

.overview-card:hover .overview-icon svg {
  stroke: white;
}

.overview-card h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.overview-card p {
  font-size: .82rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ==================== 服务流程 ==================== */
.flow-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-top: 48px;
  position: relative;
}

.flow-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 28px;
  right: 28px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  opacity: .3;
  z-index: 0;
}

.flow-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 10px;
  position: relative;
  z-index: 1;
}

.flow-num {
  width: 56px;
  height: 56px;
  background: var(--blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
  box-shadow: 0 4px 16px rgba(58,150,181,.3);
  position: relative;
}

.flow-line {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  margin-bottom: 70px;
  opacity: .3;
}

.flow-content h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.flow-content p {
  font-size: .82rem;
  color: var(--ink-soft);
  line-height: 1.6;
  max-width: 180px;
}

/* ==================== 响应式 - 五大平台 & 服务流程 ==================== */
@media (max-width: 1200px) {
  .platforms-overview-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 1024px) {
  .flow-steps {
    flex-direction: column;
    gap: 24px;
  }

  .flow-steps::before {
    display: none;
  }

  .flow-step {
    flex-direction: row;
    text-align: left;
    gap: 20px;
  }

  .flow-line {
    display: none;
  }

  .flow-content h4,
  .flow-content p {
    max-width: none;
  }
}

@media (max-width: 768px) {
  .platforms-overview-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .overview-card {
    padding: 20px 16px;
  }

  .flow-step {
    flex-direction: column;
    text-align: center;
  }

  .flow-content h4 {
    margin-bottom: 6px;
  }
}

@media (max-width: 480px) {
  .platforms-overview-grid {
    grid-template-columns: 1fr;
  }
}