/* ============================================================
   欧博官网 · 共享样式表
   说明：全站采用“原生自适应”——用流体网格、clamp 字号与百分比宽度
   自动适配任意屏宽，不依赖媒体查询，也不做 JS 设备判断。
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root{
  --ink:        #1c2730;   /* 主文字，蓝灰墨色 */
  --deep:       #10334f;   /* 深蓝，品牌主色 */
  --deep-2:     #0c2a40;
  --brand:      #0c6f73;   /* 青绿，次级色 */
  --brand-2:    #2a9d8f;
  --accent:     #d17a45;   /* 琥珀，点缀色，克制使用 */
  --paper:      #f6f4ef;   /* 暖白背景 */
  --card:       #ffffff;
  --line:       #e4ded3;
  --muted:      #5c6a75;
  --soft:       #eef2f4;

  --f-h1: clamp(2.05rem, 5vw, 3.4rem);
  --f-h2: clamp(1.6rem, 3.6vw, 2.35rem);
  --f-h3: clamp(1.15rem, 2vw, 1.45rem);
  --f-body: clamp(1rem, 1.3vw, 1.06rem);
  --f-small: .92rem;
  --f-tiny: .84rem;

  --radius: 10px;
  --shadow: 0 1px 2px rgba(28,39,48,.06), 0 8px 24px rgba(28,39,48,.07);
  --shadow-hover: 0 2px 4px rgba(28,39,48,.08), 0 16px 34px rgba(28,39,48,.12);

  --serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --sans:  "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

/* ---------- 基础 ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--sans);
  font-size:var(--f-body);
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
}
img{ max-width:100%; height:auto; display:block; }
a{ color:var(--brand); text-decoration:none; }
a:hover{ text-decoration:underline; }
h1,h2,h3,h4{ font-family:var(--serif); font-weight:700; line-height:1.35; margin:0 0 .6em; }
h1{ font-size:var(--f-h1); }
h2{ font-size:var(--f-h2); }
h3{ font-size:var(--f-h3); }
p{ margin:0 0 1em; }
ul{ margin:0; padding:0; }
:focus-visible{ outline:3px solid var(--brand-2); outline-offset:2px; }
@media (prefers-reduced-motion: reduce){
  *{ scroll-behavior:auto !important; transition:none !important; animation:none !important; }
}

/* 容器：原生流体宽度 */
.wrap{ width:min(1160px, 92vw); margin-inline:auto; }
.wrap-narrow{ width:min(900px, 92vw); margin-inline:auto; }

/* 段落语义 */
.section{ padding:clamp(2.6rem, 7vw, 5.5rem) 0; }
.section--paper{ background:var(--paper); }
.section--white{ background:#fff; }
.section--deep{ background:linear-gradient(160deg, var(--deep-2), var(--deep)); color:#eaf2f5; }
.section--deep h2{ color:#fff; }

/* 眉标与标题 */
.eyebrow{
  display:inline-block;
  font-size:var(--f-tiny);
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--accent);
  font-weight:600;
  margin-bottom:.5rem;
}
.section--deep .eyebrow{ color:#ffca9c; }
.sec-head{ margin-bottom:clamp(1.6rem,4vw,2.6rem); }
.sec-head p.lead{ max-width:56ch; color:var(--muted); margin-top:.4rem; }

/* ---------- 顶部导航 ---------- */
.site-head{
  background:#fff;
  border-bottom:1px solid var(--line);
  position:sticky; top:0; z-index:60;
}
.site-head .wrap{
  display:flex; flex-wrap:wrap;
  align-items:center; justify-content:space-between;
  gap:.6rem 1.2rem;
  padding-top:.7rem; padding-bottom:.7rem;
}
.brand{ display:flex; align-items:center; gap:.6rem; color:var(--ink); }
.brand:hover{ text-decoration:none; }
.brand .mark{
  width:2.35rem; height:2.35rem; flex:0 0 auto;
  border-radius:8px;
  background:linear-gradient(135deg, var(--brand), var(--deep));
  color:#fff; font-family:var(--serif); font-weight:900;
  display:flex; align-items:center; justify-content:center;
  font-size:1.1rem;
}
.brand .name{ font-family:var(--serif); font-weight:700; font-size:1.18rem; letter-spacing:.04em; }
.brand .name small{ display:block; font-family:var(--sans); font-weight:400; font-size:.68rem; letter-spacing:.22em; color:var(--muted); }

.site-nav{ display:flex; flex-wrap:wrap; gap:.15rem .35rem; }
.site-nav a{
  color:var(--ink); padding:.4rem .62rem; font-size:var(--f-small);
  border-radius:6px; position:relative; font-weight:500;
}
.site-nav a:hover{ background:var(--soft); text-decoration:none; }
.site-nav a.is-active{ color:var(--deep); font-weight:700; }
.site-nav a.is-active::after{
  content:""; position:absolute; left:.62rem; right:.62rem; bottom:.15rem;
  height:2px; background:var(--accent); border-radius:2px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-block; padding:.68rem 1.5rem; border-radius:8px;
  font-weight:600; font-size:var(--f-small); line-height:1.4;
  border:1px solid transparent; cursor:pointer; text-align:center;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover{ text-decoration:none; transform:translateY(-2px); }
.btn--brand{ background:var(--brand); color:#fff; box-shadow:0 6px 16px rgba(12,111,115,.3); }
.btn--brand:hover{ background:#0a5d61; }
.btn--ghost{ background:transparent; color:#fff; border-color:rgba(255,255,255,.55); }
.btn--ghost:hover{ background:rgba(255,255,255,.12); }
.btn--outline{ background:transparent; color:var(--deep); border-color:var(--deep); }
.btn--outline:hover{ background:var(--deep); color:#fff; }

/* ---------- Hero ---------- */
.hero{
  position:relative; overflow:hidden;
  background:linear-gradient(150deg, var(--deep-2) 0%, var(--deep) 55%, #0f3f52 100%);
  color:#eef5f7;
}
.hero__bg{
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; opacity:.5; mix-blend-mode:luminosity;
}
.hero__inner{
  position:relative; z-index:2;
  padding:clamp(3rem,9vw,6.5rem) 0;
  width:min(1160px,92vw); margin-inline:auto;
  display:flex; flex-wrap:wrap; align-items:center; gap:2.2rem;
}
.hero__text{ flex:1 1 420px; }
.hero__media{ flex:1 1 360px; min-width:0; }
.hero__media img{ border-radius:14px; box-shadow:0 24px 60px rgba(0,0,0,.35); }
.hero h1{ color:#fff; margin-bottom:.7rem; }
.hero p.lead{ max-width:50ch; color:#c9dbe2; margin-bottom:1.6rem; font-size:clamp(1rem,1.6vw,1.12rem); }
.hero .cta{ display:flex; flex-wrap:wrap; gap:.8rem; }
.hero__stats{
  position:relative; z-index:2; margin-top:0;
}
.hero__stats .wrap{
  border-top:1px solid rgba(255,255,255,.16);
  padding-top:clamp(1.2rem,3vw,2rem); padding-bottom:clamp(1.2rem,3vw,2rem);
  display:grid; grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));
  gap:1.2rem;
}
.stat b{ display:block; font-family:var(--serif); font-size:clamp(1.7rem,4vw,2.5rem); color:#fff; line-height:1.1; }
.stat b i{ font-style:normal; color:var(--accent); }
.stat span{ color:#b9ccd4; font-size:var(--f-tiny); letter-spacing:.04em; }

/* ---------- 卡片网格（原生自适应列数） ---------- */
.grid-cards{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap:clamp(1rem, 2.6vw, 1.8rem);
}
.grid-4{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap:clamp(1rem, 2.4vw, 1.6rem);
}
.card{
  background:var(--card); border:1px solid var(--line);
  border-radius:var(--radius); overflow:hidden;
  display:flex; flex-direction:column;
  box-shadow:var(--shadow); transition:transform .2s ease, box-shadow .2s ease;
}
.card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-hover); }
.card img{ width:100%; aspect-ratio:3/2; object-fit:cover; }
.card__body{ padding:1.2rem 1.3rem 1.4rem; display:flex; flex-direction:column; gap:.5rem; flex:1; }
.card__body h3{ margin:0; }
.card__body p{ color:var(--muted); font-size:var(--f-small); margin:0; flex:1; }
.card__body .more{ color:var(--brand); font-weight:600; font-size:var(--f-small); }

/* 无图文字卡片 */
.tcard{ background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:1.4rem; box-shadow:var(--shadow); }
.tcard h3{ font-size:var(--f-h3); }
.tcard p{ color:var(--muted); font-size:var(--f-small); margin:0; }
.tcard .num{
  font-family:var(--serif); font-weight:900; font-size:clamp(1.5rem,3vw,2rem);
  color:var(--accent); display:block; margin-bottom:.3rem; line-height:1;
}

/* ---------- 业务条目 ---------- */
.biz-item{ display:flex; flex-wrap:wrap; gap:1.2rem 1.8rem; align-items:flex-start; }
.biz-item img{ flex:1 1 300px; aspect-ratio:3/2; object-fit:cover; border-radius:var(--radius); min-width:0; }
.biz-item .txt{ flex:1 1 320px; min-width:0; }

/* ---------- 步骤流程（时间轴式） ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(min(100%,190px),1fr));
  gap:1.4rem; counter-reset:step;
}
/* 偶数步（6 项）用三列，任何屏宽都不出现“最后一行孤卡” */
.steps--three{
  grid-template-columns:repeat(auto-fit,minmax(min(100%,330px),1fr));
}
.step{
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:1.5rem 1.4rem; box-shadow:var(--shadow); position:relative;
}
.step::before{
  counter-increment:step; content:"0" counter(step);
  font-family:var(--serif); font-weight:900; font-size:1.7rem; color:var(--brand-2);
  display:block; margin-bottom:.6rem; line-height:1;
}
.step h3{ font-size:var(--f-h3); }
.step p{ color:var(--muted); font-size:var(--f-small); margin:0; }

/* ---------- 时间轴（关于历程） ---------- */
.timeline{
  display:grid; grid-template-columns:auto 1fr; gap:1.6rem 1rem;
  border-left:2px solid var(--brand-2); padding-left:1.4rem; margin-top:.6rem;
}
.timeline__item{ display:contents; }
.timeline__year{
  font-family:var(--serif); font-weight:900; color:var(--deep); font-size:1.05rem;
  white-space:nowrap;
}
.timeline__desc h4{ margin:0 0 .2rem; font-size:1.02rem; }
.timeline__desc p{ color:var(--muted); font-size:var(--f-small); margin:0; }

/* ---------- 案例卡 ---------- */
.case-card{ background:var(--card); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow); }
.case-card img{ width:100%; aspect-ratio:16/9; object-fit:cover; }
.case-card__body{ padding:1.1rem 1.2rem 1.3rem; }
.case-card__body h3{ margin:0 0 .3rem; font-size:1.12rem; }
.case-card__body p{ color:var(--muted); font-size:var(--f-small); margin:0 0 .6rem; }
.case-card .tag{
  display:inline-block; font-size:var(--f-tiny); color:var(--brand);
  background:rgba(12,111,115,.1); border-radius:20px; padding:.12rem .7rem;
}

/* ---------- 新闻列表 ---------- */
.news-list{ display:grid; gap:1.2rem; }
.news-item{
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:1.1rem 1.3rem; box-shadow:var(--shadow);
  display:flex; flex-wrap:wrap; gap:1rem 1.4rem; align-items:center;
  transition:transform .18s ease, box-shadow .18s ease;
}
.news-item:hover{ transform:translateX(4px); box-shadow:var(--shadow-hover); }
.news-item img{ flex:0 0 168px; width:168px; aspect-ratio:4/3; object-fit:cover; border-radius:8px; }
.news-item__body{ flex:1 1 260px; min-width:0; }
.news-item__body h3{ font-size:1.06rem; margin:0 0 .2rem; }
.news-item__body p{ color:var(--muted); font-size:var(--f-small); margin:0 0 .3rem; }
.news-item time{ color:var(--brand); font-size:var(--f-tiny); }

/* ---------- 联系方式与表单 ---------- */
.contact-grid{ display:flex; flex-wrap:wrap; gap:2.4rem; align-items:flex-start; }
.contact-info{ flex:1 1 320px; min-width:0; }
.contact-form{ flex:1 1 420px; min-width:0; }
.contact-info li{
  list-style:none; display:flex; gap:.7rem; align-items:flex-start;
  padding:.85rem 0; border-bottom:1px dashed var(--line);
}
.contact-info li b{ color:var(--deep); }
.field{ margin-bottom:1rem; }
.field label{ display:block; font-weight:600; font-size:var(--f-small); margin-bottom:.35rem; }
.field input,.field textarea,.field select{
  width:100%; padding:.7rem .85rem; border:1px solid var(--line); border-radius:8px;
  font:inherit; font-size:1rem; background:#fff; color:var(--ink);
}
.field input:focus,.field textarea:focus{ outline:2px solid var(--brand-2); border-color:transparent; }
.field textarea{ min-height:130px; resize:vertical; }

/* ---------- CTA 区 ---------- */
.cta-band{ text-align:center; }
.cta-band h2{ color:#fff; }
.cta-band p{ color:#c9dbe2; max-width:52ch; margin-inline:auto; }
.cta-band .cta{ display:flex; flex-wrap:wrap; justify-content:center; gap:.8rem; margin-top:1.2rem; }

/* ---------- 页脚 ---------- */
.site-foot{ background:var(--deep-2); color:#aebfca; padding:clamp(2rem,5vw,3.4rem) 0 1.6rem; }
.foot-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(min(100%,190px),1fr));
  gap:2rem; margin-bottom:2rem;
}
.site-foot h4{ color:#fff; font-size:1rem; margin-bottom:.8rem; font-family:var(--sans); }
.site-foot a{ color:#aebfca; display:inline-block; padding:.18rem 0; font-size:var(--f-small); }
.site-foot a:hover{ color:#fff; }
.site-foot .brand{ color:#fff; }
.site-foot .brand .name small{ color:#8aa0ad; }
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.12); padding-top:1.2rem;
  display:flex; flex-wrap:wrap; gap:.6rem 1.6rem; align-items:center;
  font-size:var(--f-tiny); color:#7f96a3;
}

/* ---------- 面包屑与页头横幅 ---------- */
.page-hero{
  background:linear-gradient(150deg, var(--deep-2), var(--deep)); color:#eef5f7;
  padding:clamp(2.2rem,6vw,4rem) 0;
}
.page-hero .crumbs{ font-size:var(--f-tiny); color:#9fb6c0; margin-bottom:.6rem; }
.page-hero .crumbs a{ color:#cfe0e6; }
.page-hero h1{ color:#fff; margin-bottom:.4rem; }
.page-hero p{ color:#c9dbe2; max-width:60ch; margin:0; }

/* ---------- 文章正文 ---------- */
.article{ background:#fff; padding:clamp(2rem,5vw,3.4rem) 0; }
.article .body{ max-width:780px; }
.article .body h2{ font-size:clamp(1.3rem,2.6vw,1.7rem); margin-top:1.4em; }
.article .body li{ margin:.25em 0; }
.article .meta{ color:var(--muted); font-size:var(--f-small); margin-bottom:1.4rem; }

/* 资质 / 荣誉条 */
.badge-row{ display:flex; flex-wrap:wrap; gap:.8rem; }
.badge{
  background:var(--card); border:1px solid var(--line); border-radius:8px;
  padding:.55rem .95rem; font-size:var(--f-small); font-weight:600; color:var(--deep);
  box-shadow:var(--shadow);
}

/* 数值条（部门/团队） */
.value-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr)); gap:1.6rem; }
.value-grid .vitem{ border-left:3px solid var(--accent); padding-left:1rem; }
.value-grid .vitem h3{ font-size:1.05rem; }
.value-grid .vitem p{ color:var(--muted); font-size:var(--f-small); margin:0; }

/* 表格（业务对比等） */
.table-scroll{ overflow-x:auto; }
table.tbl{ width:100%; border-collapse:collapse; font-size:var(--f-small); background:#fff; }
.tbl th,.tbl td{ border:1px solid var(--line); padding:.7rem .9rem; text-align:left; }
.tbl th{ background:var(--deep); color:#fff; font-weight:600; }
.tbl tbody tr:nth-child(even){ background:var(--soft); }