/* 铭动第二套 —— 品牌门户共享样式（补充 z2/governance/assets/style.css） */
/* 主色调与 z2 一致，用于 home/about/cases/contact 四个门户口页面 */
:root{
  --blue:#002fa7; --blue-dark:#08295d; --cyan:#0a74b2; --sky:#18a1e0;
  --pale:#f2f8fc; --line:#dce7ef; --text:#1a304a; --muted:#53697d; --white:#fff;
  --radius:12px; --header:84px;
}
*{box-sizing:border-box}
html{scroll-behavior:auto;scroll-padding-top:160px}
body{margin:0;font-family:"Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei","PingFang SC",Arial,sans-serif;color:var(--text);font-size:16px;line-height:1.8;background:#fff}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4,p,figure{margin:0}
h1,h2,h3,h4{line-height:1.45}
h1,h2,h3{font-weight:700;letter-spacing:-.035em}
h2{font-size:36px;color:var(--blue-dark)}
h3{font-size:22px;color:var(--blue-dark)}
h4{font-size:19px}
p{color:var(--muted)}
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:3px solid #d28d00;outline-offset:5px}
::selection{background:#d5ebfb;color:var(--blue-dark)}
[hidden]{display:none!important}
.container{width:min(1200px,calc(100% - 96px));margin-inline:auto}
.icon{width:24px;height:24px;flex-shrink:0;vertical-align:middle}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:fixed;top:-80px;left:16px;padding:10px 20px;background:#fff;color:var(--blue);z-index:100;border-radius:5px}
.skip:focus{top:12px}

/* 顶栏（品牌门户统一导航） */
.site-header{height:var(--header);position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid #edf1f5;backdrop-filter:blur(14px)}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;line-height:1.2}
.brand img{width:43px;height:43px;object-fit:contain}
.brand strong{font-size:22px;letter-spacing:.025em;color:#086a9a}
.brand small{display:block;font-size:8px;letter-spacing:.15em;color:#426377;margin-top:6px}
.primary-nav{display:flex;align-items:center;gap:30px;font-size:14px;font-weight:600}
.primary-nav>a:not(.nav-contact){position:relative;white-space:nowrap;padding:28px 0}
.primary-nav>a[aria-current]{color:var(--blue)}
.primary-nav>a[aria-current]::after{position:absolute;content:"";height:3px;bottom:15px;width:20px;left:calc(50% - 10px);background:var(--blue);border-radius:5px}
.primary-nav a:hover{color:var(--cyan)}
.nav-contact{display:flex;align-items:center;gap:15px;border:1px solid var(--blue);color:var(--blue);padding:9px 17px;border-radius:5px;white-space:nowrap}
.nav-contact .icon{width:17px;height:17px}
.menu-toggle{display:none;border:0;background:transparent;width:42px;height:42px;padding:10px}
.menu-toggle span{display:block;height:2px;background:var(--blue-dark);margin:5px 0}

/* Hero */
.hero{position:relative;isolation:isolate;background:#f6fbfe;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:-2;background:
  radial-gradient(900px 500px at 88% -10%,#e3f4ff 0,transparent 60%),
  radial-gradient(700px 500px at 10% 110%,#eef6fc 0,transparent 55%),
  linear-gradient(180deg,#f6fbfe 0,#ffffff 100%)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(247,252,255,.25),transparent 60%);z-index:-1;pointer-events:none}
.portal-hero{min-height:560px}
.hero-content{padding-top:72px;padding-bottom:64px}
.eyebrow{display:block;font-size:12px;line-height:1.8;font-weight:700;letter-spacing:.16em;color:var(--cyan);margin-bottom:17px}
.hero h1{font-size:54px;line-height:1.27;letter-spacing:-.045em;color:#102e56;max-width:720px}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero-description{font-size:17px;line-height:1.9;max-width:560px;margin-top:26px;color:#3d5771}
.hero-actions{display:flex;align-items:center;gap:20px;margin-top:30px;flex-wrap:wrap}
.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;padding:14px 22px;background:var(--blue);color:#fff;border:1px solid var(--blue);border-radius:5px;font-size:15px;font-weight:600;transition:background .2s,transform .2s}
.button:hover{background:#002786;transform:translateY(-2px)}
.button .icon{width:20px;height:20px}
.button-secondary{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.button-secondary:hover{background:#eef6fc}
.text-link{display:inline-flex;align-items:center;gap:16px;font-size:15px;font-weight:700;color:var(--blue)}
.text-link:hover{text-decoration:underline;text-underline-offset:5px}
.hero-motto{display:flex;align-items:center;gap:16px;margin-top:30px;font-size:14px;letter-spacing:.12em;color:#406379}
.hero-motto i{width:3px;height:3px;background:#8aacbe;border-radius:50%}
.hero-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:44px;padding:26px 30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 20px 50px #13437808}
.hero-stats b{font-size:32px;color:var(--blue);display:block;line-height:1.1}
.hero-stats span{font-size:13px;color:var(--muted)}

/* 区块 */
.section{padding:92px 0}
.pale{background:var(--pale)}
.section-head{display:flex;align-items:flex-start;gap:19px;margin-bottom:44px}
.section-head-center{flex-direction:column;align-items:center;text-align:center}
.section-marker{font-size:13px;font-family:Arial,sans-serif;font-weight:700;line-height:1.5;letter-spacing:.05em;color:var(--cyan);border-top:2px solid var(--sky);padding-top:7px;margin-top:7px;min-width:30px}
.section-head p{font-size:16px;margin-top:13px;line-height:1.8}
.section-head h2{line-height:1.45}

/* 价值卡片 */
.value-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.value-card{border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;background:linear-gradient(145deg,#fff 40%,#f4faff);transition:transform .2s,border-color .2s,box-shadow .2s}
.value-card:hover{transform:translateY(-6px);border-color:#8ebcd8;box-shadow:0 18px 42px #144b6e12}
.value-icon{width:53px;height:53px;display:grid;place-items:center;background:#e8f5ff;color:var(--blue);border-radius:12px;margin-bottom:20px}
.value-icon .icon{width:29px;height:29px}
.value-card h3{font-size:22px;margin-bottom:10px}
.value-card p{font-size:14px;line-height:1.9}

/* 两栏内容 */
.split-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.split-grid .section-head{margin-bottom:28px}
.lead-copy{font-size:21px;font-weight:600;color:var(--text);line-height:1.8}
.body-copy{margin-top:16px;font-size:15px;max-width:520px}

/* 卡片列表（2列） */
.card-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.card{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.card-body{padding:28px 30px 30px}
.card-body h3{font-size:22px;margin:14px 0}
.card-body p{font-size:14px;line-height:1.9}

/* 统计条 */
.stats-bar{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.stat-cell{background:#fff;border:1px solid var(--line);border-radius:12px;padding:28px;text-align:center}
.stat-cell b{font-size:36px;color:var(--blue);display:block;line-height:1.1}
.stat-cell span{font-size:13px;color:var(--muted)}

/* 时间线 */
.timeline{list-style:none;margin:0;padding:0;position:relative}
.timeline::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:#cfe0ec}
.timeline-item{display:flex;position:relative;padding:24px 0}
.timeline-item:nth-child(even){flex-direction:row-reverse}
.timeline-year{width:50%;text-align:right;padding-right:48px;font-size:28px;font-weight:700;color:var(--blue)}
.timeline-item:nth-child(even) .timeline-year{text-align:left;padding-left:48px;padding-right:0}
.timeline-dot{position:absolute;left:50%;top:36px;transform:translateX(-50%);width:13px;height:13px;border-radius:50%;background:var(--blue);border:3px solid #fff;box-shadow:0 0 0 1px var(--blue)}
.timeline-body{width:50%;padding-left:48px}
.timeline-item:nth-child(even) .timeline-body{padding-left:0;padding-right:48px;text-align:right}
.timeline-body p{font-size:15px}

/* 标签 */
.tag-list{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.tag{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border:1px solid #c9dce8;border-radius:8px;color:#4b6980;font-size:14px;background:#fff}
.tag b{color:var(--cyan);font-weight:600}

/* 团队 */
.team-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.team-card{border:1px solid var(--line);border-radius:12px;padding:30px 24px;text-align:center;background:#fff}
.team-avatar{width:72px;height:72px;border-radius:50%;background:#e8f5ff;color:var(--blue);display:grid;place-items:center;margin:0 auto 18px;font-size:26px;font-weight:700}
.team-card h3{font-size:19px}
.team-role{font-size:12px;color:var(--cyan);letter-spacing:.04em;margin:6px 0 14px}
.team-card p{font-size:13px}

/* 案例卡片 */
.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.case-card{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;transition:transform .2s,box-shadow .2s,border-color .2s}
.case-card:hover{transform:translateY(-5px);box-shadow:0 18px 42px #144b6e12;border-color:#8ebcd8}
.case-card .card-body h3{font-size:20px}
.case-meta{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 14px}
.case-meta span{font-size:11px;padding:3px 10px;border:1px solid #bfdbec;color:var(--cyan);border-radius:3px;background:#f5fbff}
.case-results{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.case-results span{font-size:12px;color:#2d6b4f;background:#eaf6ef;padding:3px 10px;border-radius:3px}

/* 联系 CTA */
.contact-cta{position:relative;background:var(--blue);color:#fff;padding:65px 0;overflow:hidden}
.contact-cta::after{content:"";position:absolute;width:650px;height:650px;border:1px solid #4d71c8;border-radius:50%;right:-240px;top:-290px;box-shadow:0 0 0 70px #ffffff05,0 0 0 140px #ffffff03;pointer-events:none}
.contact-cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px;position:relative;z-index:1}
.contact-cta .eyebrow{color:#abd9fc}
.contact-cta h2{color:#fff;font-size:30px}
.contact-cta p{font-size:13px;color:#cedffc;margin-top:19px}
.button-white{background:#fff;border-color:#fff;color:var(--blue);flex-shrink:0}
.button-white:hover{background:#e8f5ff}

/* 联系布局 */
.contact-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:50px;align-items:start}
.info-list{display:flex;flex-direction:column;gap:16px}
.info-card{display:flex;gap:16px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;padding:20px 22px;background:#fff}
.info-card .icon{color:var(--blue);width:22px;height:22px;margin-top:3px}
.info-card b{display:block;font-size:15px;color:var(--blue-dark)}
.info-card span{font-size:13px;color:var(--muted)}
.form-card{border:1px solid var(--line);border-radius:12px;padding:32px;background:#fff}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:13px;color:var(--blue-dark);font-weight:600}
.field input,.field textarea{font:inherit;font-size:14px;padding:11px 14px;border:1px solid #cddfe9;border-radius:6px;background:#fff;color:var(--text);width:100%}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px #e7f2fb}
.field textarea{resize:vertical;min-height:120px}
.form-card .button{width:100%;margin-top:8px}

/* 页脚 */
.footer{background:#fff}
.footer-main{display:flex;justify-content:space-between;align-items:center;padding:42px 0 33px}
.footer-name{font-size:22px;font-weight:700;letter-spacing:.04em;color:#153d69}
.footer-main p{font-size:12px;margin-top:9px;color:#6b8092}
.footer-links{display:flex;gap:28px;font-size:13px;color:#4e6880}
.footer-links a:hover{color:var(--blue)}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:20px 0;border-top:1px solid #e7edf3;font-size:11px;color:#6b8092}

/* 面包屑 */
.breadcrumb{display:flex;align-items:center;gap:13px;font-size:12px;color:#537189;margin-bottom:22px}
.breadcrumb a:hover{color:var(--blue)}

/* 响应式 */
@media(max-width:1100px){
  .container{width:calc(100% - 64px)}
  .hero h1{font-size:50px}
  .value-grid{grid-template-columns:1fr 1fr}
  .team-grid{grid-template-columns:1fr 1fr}
  .stats-bar,.hero-stats{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  :root{--header:74px}
  .split-grid,.contact-layout{grid-template-columns:1fr;gap:40px}
  .case-grid{grid-template-columns:1fr}
  .hero h1{font-size:46px}
  .section{padding:75px 0}
  h2{font-size:31px}
}
@media(max-width:680px){
  :root{--header:68px}
  .container{width:calc(100% - 40px)}
  body{font-size:15px}
  .header-inner{gap:10px}
  .primary-nav{display:none}
  .js .menu-toggle{display:block}
  .hero h1{font-size:39px;line-height:1.3}
  .hero-description{font-size:14px}
  .section{padding:58px 0}
  h2{font-size:27px}
  .value-grid{grid-template-columns:1fr}
  .team-grid{grid-template-columns:1fr}
  .stats-bar,.hero-stats{grid-template-columns:1fr 1fr;gap:14px}
  .hero-stats b{font-size:28px}
  .timeline::before{left:8px}
  .timeline-item,.timeline-item:nth-child(even){flex-direction:column}
  .timeline-year,.timeline-item:nth-child(even) .timeline-year{width:100%;text-align:left;padding:0 0 0 32px;font-size:22px}
  .timeline-dot{left:8px}
  .timeline-body,.timeline-item:nth-child(even) .timeline-body{width:100%;text-align:left;padding:12px 0 0 32px}
  .contact-cta-inner{flex-direction:column;align-items:flex-start}
  .form-grid{grid-template-columns:1fr}
  .footer-main{flex-direction:column;align-items:flex-start;gap:25px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media print{.site-header,.menu-toggle,.hero-actions,.contact-cta,.skip{display:none!important}.container{width:100%}.section{padding:25px 0}}