/* =========================================================
   昆山梵诺智能科技有限公司 企业官网
   共享样式表 — 简约大气 / 克制配色 / 响应式
   ========================================================= */

:root {
  /* 主色：深海军蓝，专业稳重 */
  --color-primary: #0f2a43;
  --color-primary-dark: #0a1d30;
  --color-primary-light: #1b3e5c;

  /* 点缀：静谧蓝灰，克制不抢戏 */
  --color-accent: #3a7ca5;
  --color-accent-soft: #e8f1f6;

  /* 中性色 */
  --color-text: #1d2733;
  --color-text-muted: #5c6b7a;
  --color-border: #e4e9ef;
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fa;

  /* 排版 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;

  /* 布局 */
  --max-width: 1200px;
  --radius: 10px;
  --shadow-sm: 0 1px 3px rgba(15, 42, 67, 0.06);
  --shadow-md: 0 8px 28px rgba(15, 42, 67, 0.08);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  color: var(--color-primary);
  letter-spacing: 0.5px;
}

.brand .logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
}

.brand .brand-sub {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 15px;
  color: var(--color-text);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

/* ---------------- 通用区块 ---------------- */
.section {
  padding: 88px 0;
}

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 14px;
  font-weight: 600;
}

.section-head h2 {
  font-size: 32px;
  color: var(--color-primary);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.section-head p {
  color: var(--color-text-muted);
  font-size: 16px;
}

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ---------------- 首页 Hero ---------------- */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(58, 124, 165, 0.35), transparent 70%);
  border-radius: 50%;
}

.hero .container {
  position: relative;
  z-index: 1;
  padding-top: 110px;
  padding-bottom: 110px;
}

.hero h1 {
  font-size: 44px;
  line-height: 1.25;
  margin-bottom: 22px;
  letter-spacing: 1px;
}

.hero p.lead {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.82);
  max-width: 640px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero .btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}

.hero .btn-outline:hover {
  background: #fff;
  color: var(--color-primary);
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  flex-wrap: wrap;
}

.hero-stats .stat .num {
  font-size: 34px;
  font-weight: 700;
  color: #fff;
}

.hero-stats .stat .label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

/* ---------------- 业务卡片 ---------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 34px 28px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-soft);
}

.card .icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: grid;
  place-items: center;
  font-size: 24px;
  margin-bottom: 20px;
}

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

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

/* ---------------- 关于页 ---------------- */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-visual {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  border-radius: var(--radius);
  min-height: 380px;
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  color: #fff;
  text-align: center;
  padding: 40px;
}

.about-visual .big-quote {
  font-size: 22px;
  line-height: 1.6;
  font-weight: 500;
  max-width: 360px;
}

.about-text h2 {
  font-size: 30px;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.value-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 16px;
}

.value-item {
  padding: 24px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-accent);
}

.value-item h4 {
  color: var(--color-primary);
  font-size: 17px;
  margin-bottom: 8px;
}

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

/* 时间线 */
.timeline {
  max-width: 760px;
  margin: 0 auto;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding-bottom: 36px;
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 130px;
  top: 8px;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item:last-child::before {
  display: none;
}

.timeline-item .year {
  font-weight: 700;
  color: var(--color-accent);
  font-size: 18px;
}

.timeline-item .body h4 {
  color: var(--color-primary);
  font-size: 17px;
  margin-bottom: 6px;
}

.timeline-item .body p {
  color: var(--color-text-muted);
  font-size: 15px;
}

/* ---------------- 产品服务分类 ---------------- */
.service-block {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 28px;
  padding: 38px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: start;
}

.service-block:last-child {
  border-bottom: none;
}

.service-block .s-icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: var(--color-primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 28px;
}

.service-block .s-body h3 {
  font-size: 21px;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.service-block .s-body p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  font-size: 13px;
  padding: 6px 14px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: 20px;
}

/* ---------------- 联系页 ---------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info h3 {
  color: var(--color-primary);
  font-size: 22px;
  margin-bottom: 20px;
}

.info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 22px;
}

.info-item .ic {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 10px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: grid;
  place-items: center;
  font-size: 20px;
}

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

.info-item .txt span {
  color: var(--color-text-muted);
  font-size: 15px;
}

/* 表单 */
.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

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

.form-group label {
  display: block;
  font-size: 14px;
  color: var(--color-primary);
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 15px;
  color: var(--color-text);
  transition: var(--transition);
  background: #fff;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

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

.form-note {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 8px;
}

.form-success {
  display: none;
  background: #e8f6ee;
  color: #1c7a45;
  border: 1px solid #b7e3c8;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 18px;
  font-size: 14px;
}

.form-success.show {
  display: block;
}

/* 地图占位 */
.map-placeholder {
  margin-top: 56px;
  height: 320px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #eef2f6, #dfe7ee);
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  border: 1px dashed var(--color-border);
  text-align: center;
}

/* ---------------- 页脚 ---------------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.78);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-grid .brand {
  color: #fff;
}

.footer-grid .brand .brand-sub {
  color: rgba(255, 255, 255, 0.55);
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
  font-size: 14px;
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-col p {
  font-size: 14px;
  margin-bottom: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 22px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    gap: 0;
    padding: 12px 24px 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-links li {
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
  }

  .nav-links a::after {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero .container {
    padding-top: 70px;
    padding-bottom: 70px;
  }

  .hero-stats {
    gap: 28px;
  }

  .section {
    padding: 60px 0;
  }

  .section-head h2 {
    font-size: 26px;
  }

  .about-split,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .about-visual {
    min-height: 260px;
  }

  .service-block {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .service-block .s-icon {
    width: 52px;
    height: 52px;
    font-size: 22px;
  }

  .timeline-item {
    grid-template-columns: 80px 1fr;
    gap: 16px;
  }

  .timeline-item::before {
    left: 90px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 18px;
  }

  .hero h1 {
    font-size: 27px;
  }

  .hero-stats .stat .num {
    font-size: 28px;
  }
}

/* ---------------- 语言切换 ---------------- */
.nav-lang {
  margin-left: auto;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 6px 14px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-lang:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ---------------- 新闻动态 ---------------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.news-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-soft);
}

.news-card .news-thumb {
  height: 180px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 40px;
}

.news-card .news-body {
  padding: 22px 24px 26px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-meta {
  font-size: 13px;
  color: var(--color-accent);
  margin-bottom: 10px;
  font-weight: 600;
}

.news-card h3 {
  font-size: 18px;
  color: var(--color-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}

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

.news-card .read-more {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.news-card .read-more:hover {
  text-decoration: underline;
}

/* 新闻详情 */
.article {
  max-width: 820px;
  margin: 0 auto;
}

.article .article-meta {
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.article h1 {
  font-size: 32px;
  color: var(--color-primary);
  margin-bottom: 24px;
  line-height: 1.35;
}

.article .lead {
  font-size: 17px;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.article h2 {
  font-size: 22px;
  color: var(--color-primary);
  margin: 32px 0 14px;
}

.article p {
  margin-bottom: 16px;
  color: var(--color-text);
}

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.article-nav a {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 14px;
}

.article-nav a.disabled {
  color: var(--color-border);
  pointer-events: none;
}

/* 响应式补充 */
@media (max-width: 860px) {
  .nav-lang {
    padding: 5px 12px;
    font-size: 12px;
  }

  .brand {
    font-size: 15px;
  }

  .brand .brand-sub {
    display: none;
  }

  .article h1 {
    font-size: 26px;
  }
}