/* =========================================
   郑州市春华信息科技有限公司 企业官网
   视觉系统：蓝色科技风 + 商务风
   ========================================= */

:root {
  /* 主色 - 深邃科技蓝 */
  --primary-900: #051e3e;
  --primary-800: #0a2d5c;
  --primary-700: #0a4d8c;
  --primary-600: #155ea8;
  --primary-500: #1e6bd6;
  --primary-400: #4d8ee0;
  --primary-300: #8ab4e8;
  --primary-200: #c4dcf3;
  --primary-100: #e6f0fa;
  --primary-50: #f4f8fd;

  /* 中性色 */
  --gray-900: #0f172a;
  --gray-800: #1a2332;
  --gray-700: #334155;
  --gray-600: #475569;
  --gray-500: #5a6b7d;
  --gray-400: #94a3b8;
  --gray-300: #cbd5e1;
  --gray-200: #e2e8f0;
  --gray-100: #f1f5f9;
  --gray-50:  #f5f7fa;

  /* 强调色 */
  --accent-gold: #d4a857;
  --accent-cyan: #06b6d4;

  /* 文字 */
  --text-primary: var(--gray-800);
  --text-secondary: var(--gray-600);
  --text-muted: var(--gray-500);

  /* 背景 */
  --bg-page: #ffffff;
  --bg-soft: var(--gray-50);
  --bg-dark: var(--primary-900);

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(10, 45, 92, 0.06);
  --shadow-md: 0 4px 16px rgba(10, 45, 92, 0.08);
  --shadow-lg: 0 10px 30px rgba(10, 45, 92, 0.12);
  --shadow-xl: 0 20px 50px rgba(10, 45, 92, 0.15);
  --shadow-glow: 0 0 40px rgba(30, 107, 214, 0.25);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 过渡 */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* 容器 */
  --container-max: 1200px;
  --container-padding: 24px;
}

/* =========================================
   基础重置
   ========================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
  border: 1px solid var(--gray-200);
  background: white;
  transition: all var(--transition);
}

input:focus, textarea:focus, select:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(30, 107, 214, 0.12);
}

/* =========================================
   通用工具类
   ========================================= */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: 100px 0;
  position: relative;
}

.section--soft {
  background: var(--bg-soft);
}

.section--dark {
  background: var(--bg-dark);
  color: white;
}

.section__header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.section__eyebrow {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--primary-500);
  text-transform: uppercase;
  margin-bottom: 16px;
  padding: 6px 16px;
  background: var(--primary-50);
  border-radius: var(--radius-full);
}

.section__title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
  color: var(--gray-900);
}

.section__subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =========================================
   按钮
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  user-select: none;
  letter-spacing: 0.02em;
}

.btn--primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  color: white;
  box-shadow: 0 4px 14px rgba(30, 107, 214, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(30, 107, 214, 0.45);
}

.btn--secondary {
  background: white;
  color: var(--primary-700);
  border: 2px solid var(--primary-200);
}

.btn--secondary:hover {
  border-color: var(--primary-500);
  color: var(--primary-500);
  transform: translateY(-2px);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn--large {
  padding: 18px 40px;
  font-size: 16px;
}

/* =========================================
   顶部导航
   ========================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

.header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-bottom-color: var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  color: var(--gray-900);
}

.logo__mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(30, 107, 214, 0.3);
  position: relative;
  overflow: hidden;
}

.logo__mark::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, rgba(255,255,255,0.2) 50%);
}

.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo__name {
  font-size: 16px;
  color: var(--gray-900);
  font-weight: 700;
}

.logo__sub {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.05em;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-700);
  position: relative;
  border-radius: var(--radius-sm);
}

.nav__link::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-500);
  transition: all var(--transition);
  transform: translateX(-50%);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--primary-600);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 24px;
}

.header__cta {
  margin-left: 16px;
}

.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav__toggle span {
  width: 22px;
  height: 2px;
  background: var(--gray-800);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav__toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* =========================================
   Hero 首屏
   ========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 120px 0 80px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #051e3e 0%, #0a4d8c 50%, #155ea8 100%);
  color: white;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(30, 107, 214, 0.4) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(6, 182, 212, 0.3) 0%, transparent 50%);
}

.hero::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: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero__content {
  max-width: 600px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 13px;
  letter-spacing: 0.1em;
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero__eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
}

.hero__title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(135deg, #4d8ee0 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 40px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero__stat {
  display: flex;
  flex-direction: column;
}

.hero__stat-num {
  font-size: 32px;
  font-weight: 800;
  color: white;
  background: linear-gradient(135deg, #fff 0%, #8ab4e8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 8px;
}

.hero__stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.02em;
}

/* Hero 右侧视觉 */
.hero__visual {
  position: relative;
  height: 480px;
}

.hero__visual-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.hero__visual-card--1 {
  top: 20px;
  left: 0;
  width: 55%;
  animation: float 6s ease-in-out infinite;
}

.hero__visual-card--2 {
  top: 240px;
  left: 50px;
  width: 55%;
  animation: float 6s ease-in-out infinite 2s;
}

.hero__visual-card--3 {
  top: 20px;
  right: 0;
  width: 38%;
  animation: float 6s ease-in-out infinite 4s;
}

.hero__card-title {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.hero__card-value {
  font-size: 28px;
  font-weight: 700;
  color: white;
  margin-bottom: 12px;
}

.hero__card-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.hero__card-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--primary-400));
  border-radius: 3px;
}

.hero__card-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
}

.hero__card-row + .hero__card-row {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hero__card-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
}

.hero__card-text {
  flex: 1;
}

.hero__card-text-main {
  font-size: 14px;
  font-weight: 600;
  color: white;
}

.hero__card-text-sub {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 2px;
}

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

.hero__visual-card--3 {
  animation: float 6s ease-in-out infinite 4s;
}

@keyframes float-center {
  0%, 100% { transform: translateY(calc(-50% + 0px)); }
  50% { transform: translateY(calc(-50% - 12px)); }
}

/* =========================================
   业务卡片
   ========================================= */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  position: relative;
  padding: 40px 32px;
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-200);
}

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

.service-card__icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--primary-600);
  font-size: 28px;
  transition: all var(--transition);
}

.service-card:hover .service-card__icon {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  color: white;
  transform: scale(1.05);
}

.service-card__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--gray-900);
}

.service-card__desc {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-card__features {
  list-style: none;
  margin-bottom: 24px;
}

.service-card__features li {
  padding: 6px 0;
  color: var(--text-secondary);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-card__features li::before {
  content: "✓";
  color: var(--primary-500);
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
}

.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-600);
  font-weight: 600;
  font-size: 14px;
  transition: all var(--transition);
}

.service-card__link:hover {
  color: var(--primary-700);
  gap: 10px;
}

/* =========================================
   合作伙伴 Logo 墙
   ========================================= */
.partners {
  padding: 80px 0;
  background: white;
  border-top: 1px solid var(--gray-100);
  border-bottom: 1px solid var(--gray-100);
}

.partners__title {
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 40px;
  text-transform: uppercase;
}

.partners__grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 16px;
  align-items: center;
}

.partner-logo {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  cursor: default;
  font-weight: 600;
  font-size: 18px;
  color: var(--gray-400);
  background: var(--gray-50);
}

.partner-logo:hover {
  color: var(--primary-600);
  background: var(--primary-50);
  transform: scale(1.05);
}

/* =========================================
   案例卡片
   ========================================= */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.case-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  cursor: pointer;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.case-card__cover {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-700), var(--primary-500));
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-card__cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 30px 30px;
}

.case-card__cover-icon {
  font-size: 64px;
  color: rgba(255, 255, 255, 0.9);
  position: relative;
  z-index: 1;
}

.case-card__tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-full);
  color: white;
  font-size: 12px;
  font-weight: 600;
  z-index: 2;
}

.case-card__body {
  padding: 28px;
}

.case-card__title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--gray-900);
}

.case-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.case-card__meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.case-card__desc {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.case-card__result {
  padding: 16px;
  background: var(--primary-50);
  border-left: 3px solid var(--primary-500);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px;
  color: var(--primary-800);
  line-height: 1.6;
}

.case-card__result strong {
  color: var(--primary-700);
  font-weight: 700;
}

/* =========================================
   优势卡片
   ========================================= */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  text-align: center;
  padding: 40px 24px;
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

.advantage-card:hover {
  border-color: var(--primary-300);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.advantage-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-700);
  font-size: 32px;
  transition: all var(--transition);
}

.advantage-card:hover .advantage-card__icon {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  color: white;
  transform: scale(1.08);
}

.advantage-card__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--gray-900);
}

.advantage-card__desc {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

/* =========================================
   联系转化区
   ========================================= */
.contact-cta {
  background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-700) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.contact-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(6, 182, 212, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(30, 107, 214, 0.2) 0%, transparent 40%);
}

.contact-cta__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}

.contact-cta__title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
}

.contact-cta__desc {
  font-size: 16px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
}

.contact-cta__points {
  list-style: none;
  display: grid;
  gap: 12px;
}

.contact-cta__points li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
}

.contact-cta__points li::before {
  content: "✓";
  width: 24px;
  height: 24px;
  background: rgba(6, 182, 212, 0.2);
  border: 1px solid var(--accent-cyan);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.contact-form {
  background: white;
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.contact-form__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.contact-form__subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.form-field {
  margin-bottom: 16px;
}

.form-field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-field label .req {
  color: #ef4444;
  margin-left: 2px;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  font-size: 15px;
  color: var(--gray-800);
  background: white;
}

.form-field textarea {
  resize: vertical;
  min-height: 100px;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--primary-500);
  background: var(--primary-50);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--gray-400);
}

.form-field .error-msg {
  display: block;
  color: #ef4444;
  font-size: 12px;
  margin-top: 4px;
  min-height: 16px;
}

.form-submit {
  width: 100%;
  padding: 14px;
  margin-top: 8px;
}

.form-success {
  display: none;
  padding: 16px;
  background: #ecfdf5;
  border: 1px solid #10b981;
  border-radius: var(--radius-md);
  color: #065f46;
  font-size: 14px;
  margin-top: 16px;
  align-items: center;
  gap: 8px;
}

.form-success.is-shown {
  display: flex;
}

/* =========================================
   Footer
   ========================================= */
.footer {
  background: var(--gray-900);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 32px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer__brand .logo__name {
  color: white;
}

.footer__brand .logo__sub {
  color: rgba(255, 255, 255, 0.5);
}

.footer__about {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
}

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 10px;
}

.footer__contact-item span:first-child {
  color: var(--accent-cyan);
  flex-shrink: 0;
}

/* 页脚联系方式链接（电话 / 邮箱） */
.footer__contact-item a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer__contact-item a:hover {
  color: white;
}

.footer__col-title {
  color: white;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}

.footer__col-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--primary-500);
}

.footer__list {
  list-style: none;
}

.footer__list li {
  margin-bottom: 10px;
}

.footer__list a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  transition: color var(--transition);
}

.footer__list a:hover {
  color: white;
  padding-left: 4px;
}

.footer__bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer__bottom a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer__bottom a:hover {
  color: white;
}

/* 备案号区域（工信部 + 公安） */
.footer__beian-links {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer__police {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer__police img {
  width: 18px;
  height: 18px;
  display: block;
  flex-shrink: 0;
}

.footer__police span {
  line-height: 1;
}

/* =========================================
   页面通用 - Page Header
   ========================================= */
.page-header {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, #051e3e 0%, #0a4d8c 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 30%, rgba(30, 107, 214, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(6, 182, 212, 0.2) 0%, transparent 50%);
}

.page-header::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: 50px 50px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
}

.page-header__inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.page-header__eyebrow {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 13px;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
}

.page-header__title {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.page-header__subtitle {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
  color: white;
}

.breadcrumb span {
  color: rgba(255, 255, 255, 0.4);
}

/* =========================================
   关于我们页
   ========================================= */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-intro__visual {
  position: relative;
  height: 420px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary-700), var(--primary-500));
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.about-intro__visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

.about-intro__visual-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 32px;
}

.about-intro__visual-num {
  font-size: 80px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #fff, #8ab4e8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about-intro__visual-label {
  font-size: 16px;
  letter-spacing: 0.1em;
}

.about-intro__text h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--gray-900);
  line-height: 1.3;
}

.about-intro__text p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 16px;
}

/* 时间线 */
.timeline {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--gray-200);
  transform: translateX(-50%);
}

.timeline__item {
  position: relative;
  width: 50%;
  padding: 20px 40px;
}

.timeline__item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline__item:nth-child(even) {
  left: 50%;
}

.timeline__dot {
  position: absolute;
  top: 28px;
  width: 16px;
  height: 16px;
  background: var(--primary-500);
  border: 4px solid white;
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--primary-100);
  z-index: 1;
}

.timeline__item:nth-child(odd) .timeline__dot {
  right: -8px;
}

.timeline__item:nth-child(even) .timeline__dot {
  left: -8px;
}

.timeline__year {
  display: inline-block;
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-600);
  margin-bottom: 8px;
}

.timeline__content {
  padding: 20px 24px;
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  display: inline-block;
  text-align: left;
  max-width: 100%;
}

.timeline__content h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.timeline__content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* 团队 */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.team-card {
  text-align: center;
  padding: 40px 24px;
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

.team-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-200);
}

.team-card__avatar {
  width: 96px;
  height: 96px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 36px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(30, 107, 214, 0.25);
}

.team-card__name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--gray-900);
}

.team-card__role {
  font-size: 14px;
  color: var(--primary-600);
  margin-bottom: 16px;
}

.team-card__desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 企业文化 */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-card {
  padding: 32px;
  background: white;
  border-radius: var(--radius-lg);
  border-top: 4px solid var(--primary-500);
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.value-card__label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--primary-500);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.value-card__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--gray-900);
}

.value-card__desc {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 15px;
}

/* =========================================
   业务与服务页 - 详情
   ========================================= */
.service-detail {
  padding: 80px 0;
}

.service-detail + .service-detail {
  border-top: 1px solid var(--gray-100);
}

.service-detail__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.service-detail__header {
  position: sticky;
  top: 100px;
}

.service-detail__num {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-500);
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.service-detail__title {
  font-size: 36px;
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.2;
  margin-bottom: 16px;
}

.service-detail__desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}

.service-detail__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.service-detail__content h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-detail__content h3:first-child {
  margin-top: 0;
}

.service-detail__content h3::before {
  content: "";
  width: 4px;
  height: 20px;
  background: var(--primary-500);
  border-radius: 2px;
}

.service-detail__content p {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 16px;
}

.brand-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 20px 0 32px;
}

.brand-item {
  padding: 20px;
  background: var(--primary-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--primary-100);
  transition: all var(--transition);
}

.brand-item:hover {
  background: white;
  border-color: var(--primary-300);
  box-shadow: var(--shadow-md);
}

.brand-item__name {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-700);
  margin-bottom: 8px;
}

.brand-item__desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 流程图 */
.process-flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin: 32px 0;
  position: relative;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-step__num {
  width: 56px;
  height: 56px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(30, 107, 214, 0.3);
  position: relative;
  z-index: 2;
}

.process-step__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.process-step__desc {
  font-size: 12px;
  color: var(--text-secondary);
}

.process-flow::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-200), var(--primary-300), var(--primary-200));
  z-index: 1;
}

/* 技术栈 */
.tech-stack {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.tech-item {
  padding: 16px;
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  text-align: center;
  font-weight: 600;
  color: var(--gray-700);
  transition: all var(--transition);
}

.tech-item:hover {
  border-color: var(--primary-300);
  color: var(--primary-700);
  background: var(--primary-50);
}

/* =========================================
   案例筛选
   ========================================= */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  background: white;
  color: var(--gray-700);
  font-weight: 500;
  font-size: 14px;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--primary-300);
  color: var(--primary-600);
}

.filter-btn.is-active {
  background: var(--primary-600);
  color: white;
  border-color: var(--primary-600);
}

/* =========================================
   联系我们页
   ========================================= */
.contact-page-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.contact-info {
  display: grid;
  gap: 24px;
}

.contact-info__item {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

.contact-info__item:hover {
  border-color: var(--primary-300);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.contact-info__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  color: var(--primary-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.contact-info__title {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 500;
}

.contact-info__value {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.contact-info__desc {
  font-size: 13px;
  color: var(--text-secondary);
}

.map-block {
  margin-top: 80px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.map-block iframe {
  width: 100%;
  height: 400px;
  border: 0;
  display: block;
}

.commitment-banner {
  margin-top: 64px;
  padding: 40px;
  background: linear-gradient(135deg, var(--primary-700), var(--primary-500));
  border-radius: var(--radius-lg);
  color: white;
  display: flex;
  align-items: center;
  gap: 32px;
}

.commitment-banner__icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  flex-shrink: 0;
}

.commitment-banner h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.commitment-banner p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 15px;
  line-height: 1.6;
}

/* =========================================
   滚动动效
   ========================================= */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* =========================================
   响应式
   ========================================= */
@media (max-width: 1024px) {
  .hero__title { font-size: 44px; }
  .hero__inner { grid-template-columns: 1fr; gap: 60px; }
  .hero__visual { height: 400px; }
  .hero__visual-card--2 { top: 200px; left: 30px; }
  .service-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cta__inner { grid-template-columns: 1fr; gap: 40px; }
  .about-intro { grid-template-columns: 1fr; }
  .about-intro__visual { height: 320px; }
  .service-detail__inner { grid-template-columns: 1fr; gap: 40px; }
  .service-detail__header { position: static; }
  .partners__grid { grid-template-columns: repeat(4, 1fr); }
  .contact-page-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 24px; }
  .timeline__item { width: 100%; left: 0 !important; text-align: left !important; padding: 12px 12px 12px 56px; }
  .timeline__item .timeline__dot { left: 16px !important; right: auto !important; }
  .process-flow { grid-template-columns: repeat(2, 1fr); }
  .process-flow::before { display: none; }
  .tech-stack { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section__title { font-size: 28px; }
  .page-header { padding: 130px 0 60px; }
  .page-header__title { font-size: 32px; }
  .hero { min-height: auto; padding: 100px 0 60px; }
  .hero__title { font-size: 36px; }
  .hero__subtitle { font-size: 16px; }
  .hero__stats { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .hero__stat-num { font-size: 24px; }
  .hero__visual { height: 360px; }
  .hero__visual-card--1 { width: 60%; }
  .hero__visual-card--2 { top: 160px; left: 20px; width: 70%; }
  .hero__visual-card--3 { width: 35%; }
  .advantage-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .footer__beian-links { justify-content: center; }
  .form-row { grid-template-columns: 1fr; }
  .partners__grid { grid-template-columns: repeat(2, 1fr); }
  .brand-grid { grid-template-columns: 1fr; }
  .nav__list {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
    transform: translateY(-120%);
    transition: transform var(--transition);
    box-shadow: var(--shadow-md);
  }
  .nav__list.is-open {
    transform: translateY(0);
  }
  .nav__toggle { display: flex; }
  .header__cta { display: none; }
  .contact-form { padding: 24px; }
  .commitment-banner { flex-direction: column; text-align: center; gap: 16px; padding: 28px; }
  .commitment-banner h3 { font-size: 20px; }
  .section__header { margin-bottom: 40px; }
}