/* ==========================================================================
   企业官网模板 · 设计令牌
   配色：墨蓝 Ink Navy / 黄铜 Brass / 象牙白 Ivory / 深潭青 Deep Teal
   字体：Noto Serif SC（标题）/ Noto Sans SC（正文）/ IBM Plex Mono（数据·标签）
   ========================================================================== */

:root{
  --ink:        #10203B;   /* 主色：墨蓝 */
  --ink-2:      #1B3358;   /* 墨蓝-浅 */
  --brass:      #B8935B;   /* 强调色：黄铜 */
  --brass-dark: #9C7A46;
  --teal:       #3B6E71;   /* 辅助色：深潭青 */
  --ivory:      #F7F5F0;   /* 背景：象牙白 */
  --paper:      #FFFFFF;
  --ink-text:   #23262B;   /* 正文文字 */
  --slate:      #667085;   /* 次要文字 */
  --line:       #E4E0D6;   /* 分隔线 */
  --shadow: 0 20px 50px -25px rgba(16,32,59,.35);

  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "Consolas", monospace;

  --container: 1160px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  color: var(--ink-text);
  background: var(--ivory);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ font-family: var(--font-display); font-weight:700; margin:0; color: var(--ink); letter-spacing:.01em; }
p{ margin:0; }
button{ font-family:inherit; cursor:pointer; }

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

/* 可访问性：可见焦点态 */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

/* -------------------- 顶部提示条 -------------------- */
.topbar{
  background: var(--ink);
  color: rgba(247,245,240,.75);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}
.topbar .container{
  display:flex; justify-content:space-between; align-items:center;
  padding-top:8px; padding-bottom:8px;
  flex-wrap:wrap; gap:6px;
}
.topbar a{ color: var(--brass); }

/* -------------------- 顶部导航 -------------------- */
.site-header{
  position: sticky; top:0; z-index: 100;
  background: rgba(247,245,240,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding: 16px 0;
}
.logo{
  display:flex; align-items:center; gap:10px;
  font-family: var(--font-display); font-weight:700; font-size:20px; color: var(--ink);
}
.logo .mark{
  width:36px; height:36px; flex:0 0 auto;
}
.logo .sub{
  display:block; font-family: var(--font-mono); font-weight:400; font-size:10px; letter-spacing:.12em; color: var(--slate);
}
.nav-links{
  display:flex; gap: 36px; align-items:center;
}
.nav-links a{
  font-size:15px; color: var(--ink-text); position:relative; padding:6px 0;
}
.nav-links a::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:2px; background: var(--brass);
  transition: right .25s ease;
}
.nav-links a:hover::after, .nav-links a.active::after{ right:0; }
.nav-links a.active{ color: var(--ink); font-weight:700; }
.nav-cta{
  display:inline-flex; align-items:center; gap:8px;
  background: var(--ink); color: var(--ivory);
  padding: 10px 20px; font-size:14px; font-weight:700; border-radius:2px;
  transition: background .2s ease;
}
.nav-cta:hover{ background: var(--brass-dark); color: var(--ink); }
.nav-toggle{ display:none; background:none; border:0; padding:8px; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width:24px; height:2px; background: var(--ink); position:relative; transition:.2s;
}
.nav-toggle span::before{ position:absolute; top:-8px; }
.nav-toggle span::after{ position:absolute; top:8px; }

@media (max-width: 900px){
  .nav-links{
    position:fixed; inset: 65px 0 0 0; background: var(--ivory);
    flex-direction:column; padding: 32px 24px; gap:22px; align-items:flex-start;
    transform: translateX(100%); transition: transform .3s ease; overflow-y:auto;
  }
  .nav-links.open{ transform: translateX(0); }
  .nav-toggle{ display:block; }
  .nav-cta{ display:none; }
}

/* -------------------- 分区通用 -------------------- */
section{ padding: 96px 0; }
.eyebrow{
  font-family: var(--font-mono); font-size:12px; letter-spacing:.18em; text-transform:uppercase;
  color: var(--brass-dark); display:flex; align-items:center; gap:10px; margin-bottom:16px;
}
.eyebrow::before{ content:""; width:28px; height:1px; background: var(--brass); }
.section-head{ max-width: 640px; margin-bottom: 56px; }
.section-head h2{ font-size: clamp(28px,3.4vw,38px); line-height:1.3; }
.section-head .desc{ margin-top:14px; color: var(--slate); font-size:16px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.section-head.center .eyebrow{ justify-content:center; }
.section-head.center .eyebrow::before{ display:none; }

.section-alt{ background: var(--paper); }
.section-dark{ background: var(--ink); color: rgba(247,245,240,.88); }
.section-dark h2, .section-dark h3, .section-dark h4{ color: var(--ivory); }
.section-dark .eyebrow{ color: var(--brass); }

/* -------------------- 面包屑 / 页头横幅（内页） -------------------- */
.page-hero{
  background: var(--ink);
  color: var(--ivory);
  padding: 72px 0 56px;
  position: relative;
  overflow:hidden;
}
.page-hero::after{
  content:""; position:absolute; right:-60px; top:-60px; width:280px; height:280px;
  border:1px solid rgba(184,147,91,.35); border-radius:2px; transform: rotate(18deg);
}
.page-hero .crumb{
  font-family: var(--font-mono); font-size:12px; letter-spacing:.08em; color: rgba(247,245,240,.6);
  margin-bottom:18px;
}
.page-hero .crumb a{ color: var(--brass); }
.page-hero h1{ color: var(--ivory); font-size: clamp(30px,4vw,44px); }
.page-hero .lede{ margin-top:14px; max-width:560px; color: rgba(247,245,240,.72); }

/* -------------------- 按钮 -------------------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding: 14px 28px; font-size:15px; font-weight:700; border-radius:2px;
  border:1px solid transparent; transition: all .2s ease;
}
.btn-primary{ background: var(--brass); color: var(--ink); }
.btn-primary:hover{ background: var(--brass-dark); }
.btn-ghost{ border-color: rgba(247,245,240,.4); color: inherit; }
.btn-ghost:hover{ border-color: var(--brass); color: var(--brass); }
.btn-line{ border-color: var(--ink); color: var(--ink); }
.btn-line:hover{ background: var(--ink); color: var(--ivory); }

/* -------------------- 首页：Hero -------------------- */
.hero{
  background: var(--ink); color: var(--ivory);
  position: relative; overflow:hidden;
  padding: 110px 0 90px;
}
.hero .container{
  display:grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items:center;
}
.hero-tag{
  font-family: var(--font-mono); font-size:12px; letter-spacing:.18em; text-transform:uppercase;
  color: var(--brass); margin-bottom:22px; display:flex; align-items:center; gap:10px;
}
.hero-tag::before{ content:""; width:28px; height:1px; background: var(--brass); }
.hero h1{
  color: var(--ivory); font-size: clamp(34px, 4.6vw, 54px); line-height:1.25;
}
.hero h1 em{ font-style:normal; color: var(--brass); }
.hero .lede{ margin-top:22px; color: rgba(247,245,240,.72); font-size:17px; max-width: 480px; }
.hero-actions{ margin-top:36px; display:flex; gap:16px; flex-wrap:wrap; }
.hero-figure{
  position:relative; aspect-ratio: 4/5; border:1px solid rgba(184,147,91,.4);
}
.hero-figure svg{ width:100%; height:100%; }
@media (max-width: 900px){
  .hero .container{ grid-template-columns: 1fr; }
  .hero-figure{ order:-1; max-width:320px; margin:0 auto; }
}

/* -------------------- 数据条 -------------------- */
.stats{
  background: var(--paper); border-bottom:1px solid var(--line);
}
.stats .container{
  display:grid; grid-template-columns: repeat(4,1fr); gap:24px; padding: 44px 24px;
}
.stat{ text-align:center; border-left:1px solid var(--line); padding-left:24px; }
.stat:first-child{ border-left:0; }
.stat .num{ font-family: var(--font-mono); font-size: clamp(26px,3vw,36px); color: var(--ink); font-weight:700; }
.stat .num span{ color: var(--brass-dark); }
.stat .label{ margin-top:8px; font-size:13px; color: var(--slate); letter-spacing:.04em; }
@media (max-width:700px){
  .stats .container{ grid-template-columns: repeat(2,1fr); row-gap:28px; }
  .stat:nth-child(3){ border-left:0; }
}

/* -------------------- 卡片网格：优势 -------------------- */
.grid{ display:grid; gap: 28px; }
.grid-3{ grid-template-columns: repeat(3,1fr); }
.grid-4{ grid-template-columns: repeat(4,1fr); }
@media (max-width: 900px){ .grid-3, .grid-4{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px){ .grid-3, .grid-4{ grid-template-columns: 1fr; } }

.adv-card{
  background: var(--paper); border:1px solid var(--line); padding: 34px 28px;
  transition: transform .2s ease, box-shadow .2s ease; position:relative;
}
.adv-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow); }
.adv-card .idx{
  font-family: var(--font-mono); font-size:12px; color: var(--brass-dark); margin-bottom:18px; letter-spacing:.08em;
}
.adv-card .ic{ width:44px; height:44px; margin-bottom:18px; color: var(--teal); }
.adv-card h3{ font-size:19px; margin-bottom:10px; }
.adv-card p{ color: var(--slate); font-size:14.5px; }

/* -------------------- 产品预览 / 产品中心 -------------------- */
.prod-card{
  background: var(--paper); border:1px solid var(--line); overflow:hidden;
  transition: box-shadow .2s ease, transform .2s ease;
}
.prod-card:hover{ box-shadow: var(--shadow); transform: translateY(-4px); }
.prod-thumb{
  aspect-ratio: 4/3; background: linear-gradient(135deg, var(--ink) 0%, var(--ink-2) 100%);
  display:flex; align-items:center; justify-content:center; position:relative; overflow:hidden;
}
.prod-thumb svg{ width:58%; height:58%; opacity:.9; }
.prod-thumb .cat{
  position:absolute; top:12px; left:12px; font-family: var(--font-mono); font-size:11px;
  color: var(--brass); border:1px solid rgba(184,147,91,.5); padding:3px 10px; letter-spacing:.06em;
}
.prod-body{ padding: 22px 24px 26px; }
.prod-body h3{ font-size:18px; margin-bottom:8px; }
.prod-body p{ color: var(--slate); font-size:14px; margin-bottom:16px; }
.prod-spec{
  display:flex; flex-wrap:wrap; gap:8px; margin-bottom:18px;
}
.prod-spec span{
  font-family: var(--font-mono); font-size:11.5px; color: var(--teal);
  background: rgba(59,110,113,.08); padding:4px 9px;
}
.prod-link{ font-size:14px; font-weight:700; color: var(--ink); display:inline-flex; align-items:center; gap:6px; }
.prod-link::after{ content:"→"; transition: transform .2s ease; }
.prod-link:hover::after{ transform: translateX(4px); }

/* 产品筛选标签 */
.filter-tabs{ display:flex; gap:10px; flex-wrap:wrap; margin-bottom:40px; }
.filter-tabs button{
  background:transparent; border:1px solid var(--line); padding:9px 20px; font-size:14px;
  color: var(--slate); transition: all .2s ease;
}
.filter-tabs button.active, .filter-tabs button:hover{
  background: var(--ink); border-color: var(--ink); color: var(--ivory);
}

/* -------------------- 新闻列表 -------------------- */
.news-row{
  display:grid; grid-template-columns: 120px 1fr auto; gap: 28px; align-items:center;
  padding: 28px 0; border-bottom:1px solid var(--line);
}
.news-row:first-child{ border-top:1px solid var(--line); }
.news-date{
  font-family: var(--font-mono); color: var(--brass-dark); font-size:14px; line-height:1.4;
}
.news-date .d{ font-size:26px; color: var(--ink); display:block; font-weight:700; }
.news-main h3{ font-size:18px; margin-bottom:8px; }
.news-main p{ color: var(--slate); font-size:14px; }
.news-tag{
  font-family: var(--font-mono); font-size:11px; color: var(--teal); border:1px solid var(--teal);
  padding:3px 10px; white-space:nowrap; height:fit-content;
}
@media (max-width: 700px){
  .news-row{ grid-template-columns: 1fr; gap:8px; }
  .news-tag{ justify-self:flex-start; }
}

/* -------------------- 时间线（关于我们） -------------------- */
.timeline{ position:relative; padding-left: 32px; }
.timeline::before{ content:""; position:absolute; left:5px; top:6px; bottom:6px; width:1px; background: var(--line); }
.tl-item{ position:relative; padding-bottom: 44px; }
.tl-item:last-child{ padding-bottom:0; }
.tl-item::before{
  content:""; position:absolute; left:-32px; top:4px; width:11px; height:11px; border-radius:50%;
  background: var(--ivory); border:2px solid var(--brass);
}
.tl-year{ font-family: var(--font-mono); color: var(--brass-dark); font-size:22px; font-weight:700; }
.tl-item h3{ font-size:17px; margin: 6px 0 8px; }
.tl-item p{ color: var(--slate); font-size:14.5px; max-width:560px; }

/* -------------------- 价值观 / 荣誉资质 -------------------- */
.value-card{ text-align:center; padding: 8px; }
.value-card .glyph{
  width:64px; height:64px; margin:0 auto 20px; color: var(--brass);
  border:1px solid var(--line); border-radius:50%; display:flex; align-items:center; justify-content:center;
}
.value-card .glyph svg{ width:28px; height:28px; }
.value-card h3{ font-size:18px; margin-bottom:10px; }
.value-card p{ color: var(--slate); font-size:14px; }

.cert-grid{ display:grid; grid-template-columns: repeat(4,1fr); gap:18px; }
.cert-card{
  border:1px solid var(--line); background: var(--paper); padding: 26px 18px; text-align:center;
}
.cert-card .badge{ width:40px; height:40px; margin:0 auto 14px; color: var(--teal); }
.cert-card p{ font-size:13.5px; color: var(--ink-text); }
@media (max-width:900px){ .cert-grid{ grid-template-columns: repeat(2,1fr); } }

/* -------------------- 团队 -------------------- */
.team-card{ background: var(--paper); border:1px solid var(--line); }
.team-photo{
  aspect-ratio:3/4; background: linear-gradient(160deg,#EDE8DC,#DED6C2);
  display:flex; align-items:center; justify-content:center;
}
.team-photo svg{ width:46%; color: var(--ink); opacity:.55; }
.team-body{ padding:18px 20px 22px; }
.team-body h3{ font-size:16px; margin-bottom:4px; }
.team-body .role{ font-family: var(--font-mono); font-size:12px; color: var(--brass-dark); }

/* -------------------- CTA 横幅 -------------------- */
.cta-band{
  background: var(--ink); color: var(--ivory); text-align:center; padding: 70px 24px;
  position:relative; overflow:hidden;
}
.cta-band h2{ color: var(--ivory); font-size: clamp(26px,3.2vw,34px); }
.cta-band p{ margin-top:14px; color: rgba(247,245,240,.7); }
.cta-band .actions{ margin-top:30px; display:flex; gap:16px; justify-content:center; flex-wrap:wrap; }

/* -------------------- 联系我们 -------------------- */
.contact-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items:start; }
@media (max-width:900px){ .contact-grid{ grid-template-columns:1fr; } }
.contact-info-list{ display:flex; flex-direction:column; gap:22px; margin-top:30px; }
.contact-info-item{ display:flex; gap:16px; }
.contact-info-item .ic{
  width:44px; height:44px; flex:0 0 auto; border:1px solid var(--line); display:flex;
  align-items:center; justify-content:center; color: var(--teal);
}
.contact-info-item .ic svg{ width:20px; height:20px; }
.contact-info-item h4{ font-size:15px; margin-bottom:4px; }
.contact-info-item p{ color: var(--slate); font-size:14px; }

.map-placeholder{
  margin-top:36px; aspect-ratio:16/9; background: var(--paper); border:1px dashed var(--line);
  display:flex; align-items:center; justify-content:center; text-align:center; padding:24px;
  color: var(--slate); font-size:13px; font-family: var(--font-mono);
}

.form-field{ margin-bottom:20px; }
.form-field label{ display:block; font-size:13px; color: var(--slate); margin-bottom:8px; font-family: var(--font-mono); letter-spacing:.03em; }
.form-field input, .form-field textarea{
  width:100%; border:1px solid var(--line); background: var(--paper); padding: 13px 14px;
  font-family: var(--font-body); font-size:14.5px; color: var(--ink-text);
}
.form-field textarea{ resize:vertical; min-height:120px; }
.form-row{ display:grid; grid-template-columns:1fr 1fr; gap:20px; }
@media (max-width:560px){ .form-row{ grid-template-columns:1fr; } }
.form-note{ margin-top:16px; font-size:12.5px; color: var(--slate); }

/* -------------------- 页脚 -------------------- */
.site-footer{ background: var(--ink); color: rgba(247,245,240,.72); padding: 64px 0 0; }
.footer-top{
  display:grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px;
  border-bottom:1px solid rgba(247,245,240,.14);
}
@media (max-width:900px){ .footer-top{ grid-template-columns: 1fr 1fr; } }
@media (max-width:560px){ .footer-top{ grid-template-columns: 1fr; } }
.footer-top h4{ color: var(--ivory); font-size:14px; letter-spacing:.06em; margin-bottom:20px; font-family: var(--font-mono); }
.footer-top .flogo{ font-family: var(--font-display); color: var(--ivory); font-size:22px; margin-bottom:14px; }
.footer-top p{ font-size:13.5px; line-height:1.9; }
.footer-links li{ margin-bottom:12px; }
.footer-links a{ font-size:13.5px; transition: color .2s ease; }
.footer-links a:hover{ color: var(--brass); }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;
  padding: 22px 0; font-size:12px; color: rgba(247,245,240,.55);
}
.beian{ display:flex; align-items:center; gap:18px; flex-wrap:wrap; }
.beian a{ display:inline-flex; align-items:center; gap:6px; }
.beian svg{ width:14px; height:14px; }
.beian a:hover{ color: var(--brass); }

/* -------------------- 面板：文本 + 图示（关于/产品详情等复用） -------------------- */
.split{
  display:grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items:center;
}
@media (max-width: 900px){ .split{ grid-template-columns:1fr; } }
.split-figure{
  aspect-ratio: 4/3; background: var(--paper); border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center; overflow:hidden;
}
.split-figure svg{ width:70%; height:70%; }

/* -------------------- 通用组件收尾 -------------------- */
.divider{ height:1px; background: var(--line); margin: 0; }
.tag-pill{
  display:inline-block; font-family:var(--font-mono); font-size:11px; letter-spacing:.06em;
  color: var(--teal); border:1px solid var(--teal); padding:3px 12px; margin-bottom:14px;
}