/* ==========================================================
   四川亿安达尔建设工程有限公司 — 企业官网样式表
   ========================================================== */

:root{
  --navy:       #0D3050;
  --navy-2:     #17456E;
  --navy-3:     #25608F;
  --ink:        #101820;
  --ink-2:      #3E4A56;
  --ink-3:      #6E7A87;
  --ink-4:      #9AA4AE;
  --line:       #E4E7EA;
  --line-2:     #EFF1F3;
  --bg:         #FFFFFF;
  --bg-soft:    #F6F7F8;
  --bg-warm:    #FAF8F4;
  --accent:     #EF6A1A;
  --accent-ink: #C2540E;
  --accent-soft:#FDF0E3;
  --radius:     4px;
  --radius-lg:  6px;
  --maxw:       1200px;
  --ease:       cubic-bezier(.22,.61,.36,1);
  --sans: "Inter","SF Pro Text",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --serif: "Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:var(--sans); font-size:16px; line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{ margin:0; font-family:var(--serif); font-weight:600; line-height:1.28; letter-spacing:.01em; }
p{ margin:0; }
a{ color:inherit; text-decoration:none; }
ul,ol{ margin:0; padding:0; list-style:none; }
img,svg{ display:block; max-width:100%; }
::selection{ background:rgba(184,135,63,.22); }

.wrap{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 32px; }
.wrap-narrow{ max-width:820px; }

/* ---------- 通用排版 ---------- */
.kicker{
  display:inline-block; font-family:var(--sans);
  font-size:12px; font-weight:650; letter-spacing:.22em; text-transform:uppercase;
  color:var(--accent);
}
.kicker.plain{ color:var(--ink-4); }
.sec-title{ font-size:clamp(26px,3.4vw,38px); margin-top:14px; }
.sec-lede{ color:var(--ink-3); font-size:16.5px; margin-top:16px; max-width:60ch; line-height:1.8; }
.sec{ padding:96px 0; }
.sec-sm{ padding:64px 0; }
.sec-soft{ background:var(--bg-soft); }
.sec-warm{ background:var(--bg-warm); }
.sec-dark{ background:var(--navy); color:#fff; }
.sec-dark .sec-title{ color:#fff; }
.sec-dark .sec-lede{ color:rgba(255,255,255,.62); }
.sec-dark .kicker{ color:#F5A55C; }

.sec-head{ display:flex; align-items:flex-end; justify-content:space-between; gap:40px; margin-bottom:52px; }
.sec-head .sec-lede{ margin-top:14px; }
.sec-head.center{ display:block; text-align:center; }
.sec-head.center .sec-lede{ margin-left:auto; margin-right:auto; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  height:46px; padding:0 26px; border-radius:var(--radius);
  font-family:var(--sans); font-size:14.5px; font-weight:600; letter-spacing:.02em;
  border:1px solid transparent; cursor:pointer; white-space:nowrap;
  transition:background .2s, color .2s, border-color .2s, transform .2s var(--ease);
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--navy); color:#fff; }
.btn-primary:hover{ background:var(--navy-2); }
.btn-accent{ background:var(--accent); color:#fff; }
.btn-accent:hover{ background:var(--accent-ink); }
.btn-outline{ border-color:var(--line); background:#fff; color:var(--ink); }
.btn-outline:hover{ border-color:var(--navy); background:#fff; color:var(--navy); }
.btn-light{ background:#fff; color:var(--navy); }
.btn-light:hover{ background:#F0F2F4; }
.btn-ghost-light{ border-color:rgba(255,255,255,.26); color:#fff; }
.btn-ghost-light:hover{ border-color:rgba(255,255,255,.6); background:rgba(255,255,255,.06); }
.btn svg{ flex:none; }

.textlink{
  display:inline-flex; align-items:center; gap:8px;
  font-size:14px; font-weight:600; color:var(--navy); letter-spacing:.02em;
  border-bottom:1px solid rgba(14,34,51,.22); padding-bottom:2px;
  transition:color .2s, border-color .2s, gap .2s;
}
.textlink:hover{ color:var(--accent); border-color:var(--accent); gap:12px; }
.textlink.on-dark{ color:#fff; border-color:rgba(255,255,255,.3); }
.textlink.on-dark:hover{ color:#F5A55C; border-color:#F5A55C; }

/* ---------- 顶部工具条 + 导航 ---------- */
.topbar{
  background:var(--navy); color:rgba(255,255,255,.55);
  font-size:12.5px; letter-spacing:.04em;
}
.topbar .wrap{ display:flex; align-items:center; justify-content:space-between; height:36px; }
.topbar a:hover{ color:#fff; }
.topbar-links{ display:flex; gap:22px; align-items:center; }

header.site{ position:sticky; top:0; z-index:90; background:rgba(255,255,255,.94); backdrop-filter:blur(12px); border-bottom:1px solid var(--line); }
header.site .wrap{ display:flex; align-items:center; justify-content:space-between; height:76px; gap:32px; }

.logo{ display:flex; align-items:center; gap:11px; flex:none; }
.logo-mark{
  width:34px; height:34px; flex:none; position:relative;
  background:var(--navy); border-radius:2px;
}
.logo-mark::before{
  content:""; position:absolute; left:9px; top:9px; width:16px; height:16px;
  border-top:1.6px solid var(--accent); border-left:1.6px solid var(--accent);
}
.logo-mark::after{
  content:""; position:absolute; right:9px; bottom:9px; width:16px; height:16px;
  border-bottom:1.6px solid #fff; border-right:1.6px solid #fff;
}
.logo-txt{ display:flex; flex-direction:column; line-height:1.15; }
.logo-txt b{ font-family:var(--serif); font-size:18px; letter-spacing:.1em; font-weight:600; }
.logo-txt span{ font-size:9.5px; letter-spacing:.26em; color:var(--ink-4); font-weight:600; }
.logo-img{ height:42px; width:auto; flex:none; border-radius:4px; }
.foot-brand .logo-img{ background:#fff; padding:4px; height:48px; border-radius:8px; }

.nav{ display:flex; align-items:center; gap:2px; }
.nav > a{
  position:relative; padding:10px 15px; font-size:14.5px; font-weight:540; color:var(--ink-2);
  transition:color .2s;
}
.nav > a::after{
  content:""; position:absolute; left:15px; right:15px; bottom:4px; height:1.5px;
  background:var(--accent); transform:scaleX(0); transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav > a:hover{ color:var(--navy); }
.nav > a:hover::after{ transform:scaleX(1); }
.nav > a.active{ color:var(--navy); font-weight:650; }
.nav > a.active::after{ transform:scaleX(1); }

.nav-right{ display:flex; align-items:center; gap:10px; flex:none; }
.nav-right .btn{ height:40px; padding:0 20px; font-size:14px; }
.burger{
  display:none; width:42px; height:42px; border:1px solid var(--line); background:#fff;
  border-radius:var(--radius); align-items:center; justify-content:center; cursor:pointer;
}
.burger span{ display:block; width:17px; height:1.5px; background:var(--navy); position:relative; }
.burger span::before,.burger span::after{
  content:""; position:absolute; left:0; width:17px; height:1.5px; background:var(--navy);
}
.burger span::before{ top:-5.5px; } .burger span::after{ top:5.5px; }

.mmenu{ display:none; border-top:1px solid var(--line); background:#fff; }
.mmenu.open{ display:block; }
.mmenu .wrap{ padding-top:8px; padding-bottom:20px; }
.mmenu a{ display:block; padding:13px 0; border-bottom:1px solid var(--line-2); font-size:16px; color:var(--ink-2); }
.mmenu a.active{ color:var(--navy); font-weight:650; }

/* ---------- 首页 Hero ---------- */
.hero{
  position:relative; overflow:hidden; color:#fff;
  background:linear-gradient(112deg,#0A2E4E 0%,#14446E 54%,#0E385C 100%);
}
.hero::before{
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.5;
  background:
    radial-gradient(48% 60% at 78% 18%, rgba(184,135,63,.28), transparent 70%),
    radial-gradient(42% 54% at 12% 88%, rgba(52,110,160,.32), transparent 72%);
}
.hero::after{
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.16;
  background-image:linear-gradient(rgba(255,255,255,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(80% 70% at 50% 30%,#000,transparent 80%);
  -webkit-mask-image:radial-gradient(80% 70% at 50% 30%,#000,transparent 80%);
}
.hero .wrap{ position:relative; z-index:1; padding-top:104px; padding-bottom:96px; }
.hero-grid{ display:grid; grid-template-columns:1.15fr .85fr; gap:64px; align-items:center; }
.hero h1{
  font-size:clamp(32px,4.4vw,52px); line-height:1.22; letter-spacing:.015em;
  color:#fff; margin-top:22px;
}
.hero h1 em{ font-style:normal; color:#F7B76B; }
.hero p.lede{ color:rgba(255,255,255,.68); font-size:17px; line-height:1.85; margin-top:24px; max-width:34em; }
.hero-actions{ display:flex; gap:12px; margin-top:38px; flex-wrap:wrap; }
.hero-tags{ display:flex; gap:26px; margin-top:52px; padding-top:26px; border-top:1px solid rgba(255,255,255,.14); flex-wrap:wrap; }
.hero-tags div{ min-width:96px; }
.hero-tags b{ display:block; font-family:var(--serif); font-size:26px; color:#fff; letter-spacing:.02em; }
.hero-tags small{ font-size:12.5px; color:rgba(255,255,255,.5); letter-spacing:.06em; }

.hero-panel{
  border:1px solid rgba(255,255,255,.16); background:rgba(255,255,255,.045);
  backdrop-filter:blur(6px); padding:30px 28px; border-radius:var(--radius-lg);
}
.hero-panel h4{ font-size:15px; color:#fff; letter-spacing:.06em; font-weight:600; }
.hero-panel .hp-sub{ font-size:12.5px; color:rgba(255,255,255,.45); margin-top:6px; letter-spacing:.04em; }
.hp-list{ margin-top:22px; display:flex; flex-direction:column; }
.hp-list li{
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  padding:15px 0; border-top:1px solid rgba(255,255,255,.1); font-size:14px; color:rgba(255,255,255,.82);
}
.hp-list li:first-child{ border-top:0; }
.hp-list span{ font-size:12.5px; color:rgba(255,255,255,.42); letter-spacing:.04em; }

/* ---------- 客户条 ---------- */
.clients{ border-bottom:1px solid var(--line); background:#fff; }
.clients .wrap{ padding-top:30px; padding-bottom:30px; display:flex; align-items:center; gap:40px; }
.clients .label{ font-size:12px; letter-spacing:.16em; color:var(--ink-4); text-transform:uppercase; flex:none; }
.client-row{ display:flex; align-items:center; justify-content:space-between; gap:32px; flex:1; flex-wrap:wrap; }
.client-row span{ font-family:var(--serif); font-size:15.5px; color:#AEB6BE; letter-spacing:.08em; transition:color .25s; }
.client-row span:hover{ color:var(--ink-2); }

/* ---------- 业务卡片 ---------- */
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:0; border-top:1px solid var(--line); border-left:1px solid var(--line); }
.grid-2{ display:grid; grid-template-columns:repeat(2,1fr); gap:0; border-top:1px solid var(--line); border-left:1px solid var(--line); }
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; border-top:1px solid var(--line); border-left:1px solid var(--line); }

.biz{
  position:relative; padding:40px 34px 44px; border-right:1px solid var(--line); border-bottom:1px solid var(--line);
  background:#fff; transition:background .3s var(--ease);
}
.biz:hover{ background:var(--bg-warm); }
.biz .num{
  font-family:var(--sans); font-size:11.5px; font-weight:650; letter-spacing:.14em; color:var(--ink-4);
}
.biz h3{ font-size:19.5px; margin-top:20px; }
.biz h3 a{ transition:color .2s; }
.biz:hover h3 a{ color:var(--accent-ink); }
.biz p{ font-size:14.5px; color:var(--ink-3); line-height:1.78; margin-top:12px; }
.biz .biz-more{ margin-top:22px; font-size:13px; font-weight:600; letter-spacing:.04em; color:var(--accent); display:inline-flex; gap:7px; align-items:center; }
.biz .icon-box{
  width:44px; height:44px; display:grid; place-items:center; border:1px solid var(--line);
  border-radius:var(--radius); color:var(--navy); margin-bottom:24px; background:#fff;
}
.biz:hover .icon-box{ border-color:#F3CFA5; color:var(--accent-ink); background:var(--accent-soft); }

/* ---------- 数据带 ---------- */
.figures{ display:grid; grid-template-columns:repeat(4,1fr); }
.figures .fig{ padding:0 32px; border-left:1px solid rgba(255,255,255,.12); }
.figures .fig:first-child{ border-left:0; padding-left:0; }
.fig b{ display:block; font-family:var(--serif); font-size:clamp(30px,3.6vw,40px); color:#fff; letter-spacing:.01em; }
.fig b i{ font-style:normal; font-size:.55em; color:#F5A55C; margin-left:3px; }
.fig small{ display:block; margin-top:8px; font-size:13px; color:rgba(255,255,255,.5); letter-spacing:.06em; }

/* ---------- 案例 ---------- */
.case{
  display:grid; grid-template-columns:1fr 1fr; gap:0; border:1px solid var(--line);
  background:#fff; overflow:hidden; transition:border-color .3s, box-shadow .3s;
}
.case:hover{ border-color:#D9DDE1; box-shadow:0 20px 50px -34px rgba(14,34,51,.4); }
.case-media{
  position:relative; min-height:300px;
  background:linear-gradient(135deg,#0F3B60,#1D5484);
  overflow:hidden;
}
.case-media::after{
  content:""; position:absolute; inset:0; opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:44px 44px;
}
.case-media .tag{
  position:absolute; z-index:1; left:24px; top:24px;
  font-size:11px; letter-spacing:.14em; color:#F7C289; border:1px solid rgba(227,200,156,.4);
  padding:5px 11px; border-radius:2px; text-transform:uppercase;
}
.case-body{ padding:40px 38px; display:flex; flex-direction:column; }
.case-body h3{ font-size:21px; }
.case-body p{ font-size:14.5px; color:var(--ink-3); margin-top:14px; line-height:1.8; }
.case-metrics{ display:flex; gap:34px; margin-top:auto; padding-top:28px; flex-wrap:wrap; }
.case-metrics div b{ display:block; font-family:var(--serif); font-size:23px; color:var(--navy); }
.case-metrics div small{ font-size:12px; color:var(--ink-4); letter-spacing:.04em; }

.newslayout{ display:grid; grid-template-columns:1fr 320px; gap:64px; align-items:start; }
.casegrid{ display:grid; grid-template-columns:1fr 1fr; gap:32px; }
.casepair{ display:grid; grid-template-columns:1fr 1fr; gap:0; }

/* ---------- 列表 / 时间线 ---------- */
.timeline{ border-left:1px solid var(--line); padding-left:0; }
.tl-item{ position:relative; padding:0 0 42px 34px; }
.tl-item::before{
  content:""; position:absolute; left:-4.5px; top:7px; width:8px; height:8px;
  background:#fff; border:1.5px solid var(--accent); border-radius:50%;
}
.tl-item:last-child{ padding-bottom:0; }
.tl-year{ font-family:var(--serif); font-size:19px; color:var(--accent-ink); letter-spacing:.04em; }
.tl-item h4{ font-size:16.5px; margin-top:8px; }
.tl-item p{ font-size:14.5px; color:var(--ink-3); margin-top:8px; max-width:52ch; }

.newslist{ border-top:1px solid var(--line); }
.newsitem{
  display:grid; grid-template-columns:120px 1fr 130px; gap:32px; align-items:baseline;
  padding:26px 0; border-bottom:1px solid var(--line); transition:background .25s;
}
.newsitem:hover{ background:var(--bg-warm); }
.newsitem:hover h3 a{ color:var(--accent-ink); }
.newsitem .nd{ font-family:var(--serif); font-size:15px; color:var(--ink-4); letter-spacing:.04em; }
.newsitem h3{ font-size:17px; transition:color .2s; }
.newsitem p{ font-size:14px; color:var(--ink-3); margin-top:7px; }
.newsitem .nc{ font-size:12px; letter-spacing:.1em; color:var(--ink-4); text-transform:uppercase; text-align:right; }

/* ---------- 表单 ---------- */
.form-grid{ display:grid; grid-template-columns:1fr 1fr; gap:22px 24px; }
.field{ display:flex; flex-direction:column; gap:8px; }
.field.full{ grid-column:1/-1; }
.field label{ font-size:13px; font-weight:600; letter-spacing:.06em; color:var(--ink-2); }
.field label i{ color:var(--accent); font-style:normal; }
.field input,.field select,.field textarea{
  width:100%; font-family:var(--sans); font-size:14.5px; color:var(--ink);
  padding:12px 14px; border:1px solid var(--line); border-radius:var(--radius);
  background:#fff; transition:border-color .2s, box-shadow .2s;
}
.field textarea{ min-height:140px; resize:vertical; line-height:1.7; }
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--navy); box-shadow:0 0 0 3px rgba(14,34,51,.07);
}
.form-note{ font-size:12.5px; color:var(--ink-4); margin-top:18px; line-height:1.7; }

/* ---------- 联系信息块 ---------- */
.info-row{ display:grid; grid-template-columns:repeat(3,1fr); gap:0; border-top:1px solid var(--line); border-left:1px solid var(--line); }
.info-cell{ padding:32px 30px; border-right:1px solid var(--line); border-bottom:1px solid var(--line); background:#fff; }
.info-cell small{ display:block; font-size:12px; letter-spacing:.14em; color:var(--ink-4); text-transform:uppercase; }
.info-cell b{ display:block; font-family:var(--serif); font-size:18px; margin-top:12px; font-weight:600; }
.info-cell p{ font-size:14px; color:var(--ink-3); margin-top:6px; line-height:1.7; }

/* ---------- 页头（内页） ---------- */
.pagehead{ background:var(--navy); color:#fff; position:relative; overflow:hidden; }
.pagehead::before{
  content:""; position:absolute; inset:0; opacity:.45;
  background:radial-gradient(46% 70% at 82% 10%, rgba(184,135,63,.34), transparent 70%);
}
.pagehead .wrap{ position:relative; z-index:1; padding:74px 0 66px; }
.crumb{ font-size:12.5px; letter-spacing:.06em; color:rgba(255,255,255,.45); display:flex; gap:9px; align-items:center; }
.crumb a:hover{ color:#fff; }
.crumb span{ opacity:.4; }
.pagehead h1{ font-size:clamp(28px,3.8vw,42px); color:#fff; margin-top:20px; }
.pagehead p{ color:rgba(255,255,255,.6); font-size:16px; margin-top:16px; max-width:56ch; line-height:1.8; }

/* ---------- CTA 条 ---------- */
.ctabar{ background:var(--bg-warm); border-top:1px solid var(--line); }
.ctabar .wrap{ padding:64px 0; display:flex; align-items:center; justify-content:space-between; gap:40px; flex-wrap:wrap; }
.ctabar h2{ font-size:clamp(22px,2.6vw,29px); }
.ctabar p{ color:var(--ink-3); font-size:15px; margin-top:10px; }
.ctabar-actions{ display:flex; gap:12px; flex-wrap:wrap; }

/* ---------- 页脚 ---------- */
footer.site{ background:var(--navy); color:rgba(255,255,255,.56); padding:70px 0 30px; }
.foot-top{ display:grid; grid-template-columns:1.8fr 1.2fr 1fr 1.2fr; gap:40px; padding-bottom:50px; border-bottom:1px solid rgba(255,255,255,.12); }
.foot-brand .logo-txt b{ color:#fff; }
.foot-brand .logo-txt span{ color:rgba(255,255,255,.35); }
.foot-brand .logo-mark{ background:#fff; }
.foot-brand .logo-mark::before{ border-color:var(--accent); }
.foot-brand .logo-mark::after{ border-color:var(--navy); }
.foot-brand p{ font-size:13.5px; line-height:1.85; margin-top:20px; max-width:280px; color:rgba(255,255,255,.5); }
.foot-col h5{ font-family:var(--sans); font-size:12.5px; font-weight:650; letter-spacing:.14em; color:#fff; text-transform:uppercase; margin-bottom:18px; }
.foot-col a{ display:block; font-size:14px; padding:5px 0; color:rgba(255,255,255,.56); transition:color .2s; }
.foot-col a:hover{ color:#fff; }
.foot-bot{ display:flex; align-items:center; justify-content:space-between; gap:20px; padding-top:26px; font-size:12.5px; flex-wrap:wrap; }
.foot-bot a:hover{ color:#fff; }
.foot-bot .fb-links{ display:flex; gap:22px; flex-wrap:wrap; }
.site-hits{ font-size:12.5px; color:rgba(255,255,255,.45); letter-spacing:.04em; white-space:nowrap; }
.site-hits b{ color:rgba(255,255,255,.8); font-weight:600; font-variant-numeric:tabular-nums; }

/* ---------- 分栏与流程 ---------- */
.split2{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:start; }
.split2 .split2-media{ position:sticky; top:110px; }
.media-pane{
  position:relative; overflow:hidden; aspect-ratio:5/4;
  background:linear-gradient(135deg,#0D3050,#1E5686);
}
.media-pane::after{
  content:""; position:absolute; inset:0; opacity:.26;
  background-image:linear-gradient(rgba(255,255,255,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:38px 38px;
}
.media-pane img{
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; z-index:0; transition:transform .6s var(--ease);
}
.media-pane:hover img{ transform:scale(1.03); }
.media-pane .mp-label{
  position:absolute; z-index:1; left:26px; bottom:22px;
  font-size:11.5px; letter-spacing:.16em; color:rgba(255,255,255,.62); text-transform:uppercase;
}

.steps{ display:grid; grid-template-columns:repeat(5,1fr); border-top:1px solid var(--line); }
.step{ padding:28px 26px 32px 0; border-right:1px solid var(--line); position:relative; }
.step:last-child{ border-right:0; padding-right:0; }
.step .sn{ font-size:11.5px; font-weight:650; letter-spacing:.16em; color:var(--accent); }
.step h4{ font-size:16px; margin-top:14px; }
.step p{ font-size:13.5px; color:var(--ink-3); margin-top:9px; line-height:1.75; }
.step::before{
  content:""; position:absolute; top:-4px; left:0; width:7px; height:7px;
  background:var(--accent); border-radius:50%;
}

.industry{ display:flex; flex-wrap:wrap; gap:10px; margin-top:26px; }
.industry span{
  font-size:13.5px; color:var(--ink-2); padding:8px 16px; border:1px solid var(--line);
  border-radius:2px; background:#fff; transition:border-color .2s, color .2s;
}
.industry span:hover{ border-color:var(--accent); color:var(--accent-ink); }

/* ---------- 图片组件 ---------- */
.img-cover{ width:100%; height:100%; object-fit:cover; display:block; }
.photo-strip{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.photo-card{
  position:relative; overflow:hidden; border-radius:var(--radius-lg);
  border:1px solid var(--line); aspect-ratio:4/3; background:#DDE3E8;
}
.photo-card img{ transition:transform .6s var(--ease); }
.photo-card:hover img{ transform:scale(1.04); }
.photo-card figcaption{
  position:absolute; left:0; right:0; bottom:0; z-index:1;
  padding:36px 18px 14px; color:#fff; font-size:13.5px; font-weight:600; letter-spacing:.06em;
  background:linear-gradient(transparent, rgba(10,20,32,.72));
}
.hero-banner{
  position:relative; overflow:hidden; border-radius:var(--radius-lg);
  border:1px solid var(--line); aspect-ratio:21/8;
}
.hero-banner img{ transition:transform 8s var(--ease); }
.hero-banner:hover img{ transform:scale(1.05); }

/* ---------- 图库 / 证照 / 灯箱 ---------- */
.gallery{ display:grid; grid-template-columns:repeat(4,1fr); gap:14px; }
.gallery figure{
  position:relative; overflow:hidden; margin:0; border-radius:var(--radius-md);
  border:1px solid var(--line); aspect-ratio:4/3; background:#DDE3E8; cursor:zoom-in;
}
.gallery figure.tall{ aspect-ratio:3/4; grid-row:span 1; }
.gallery img{ transition:transform .6s var(--ease); }
.gallery figure:hover img{ transform:scale(1.05); }
.gallery figcaption{
  position:absolute; left:0; right:0; bottom:0; z-index:1;
  padding:30px 14px 10px; color:#fff; font-size:12px; letter-spacing:.05em;
  background:linear-gradient(transparent, rgba(10,20,32,.66));
}

.cert-grid{ display:grid; grid-template-columns:1fr 1fr; gap:28px; align-items:start; }
.cert-card{
  position:relative; overflow:hidden; margin:0; border-radius:var(--radius-lg);
  border:1px solid var(--line); background:#fff; cursor:zoom-in;
  box-shadow:0 10px 34px rgba(13,48,80,.08); transition:transform .4s var(--ease), box-shadow .4s var(--ease);
}
.cert-card:hover{ transform:translateY(-4px); box-shadow:0 18px 44px rgba(13,48,80,.14); }
.cert-card img{ display:block; width:100%; }
.cert-card figcaption{
  display:flex; justify-content:space-between; align-items:center; gap:12px;
  padding:16px 20px; border-top:1px solid var(--line); background:#fff;
}
.cert-card figcaption b{ font-size:14.5px; }
.cert-card figcaption small{ font-size:12px; color:var(--ink-4); }

.cred-list{ display:grid; grid-template-columns:1fr 1fr; gap:18px 44px; margin-top:30px; }
.cred-list > div{ border-top:1px solid var(--line); padding-top:12px; }
.cred-list b{ font-size:13px; color:var(--ink-4); font-weight:600; letter-spacing:.08em; display:block; }
.cred-list span{ font-size:15.5px; display:block; margin-top:5px; }

.lightbox{
  position:fixed; inset:0; z-index:200; display:none;
  background:rgba(8,18,30,.88); backdrop-filter:blur(4px);
  align-items:center; justify-content:center; padding:4vh 4vw; cursor:zoom-out;
}
.lightbox.open{ display:flex; }
.lightbox img{
  max-width:100%; max-height:100%; border-radius:6px;
  box-shadow:0 24px 80px rgba(0,0,0,.5);
}
.lightbox .lb-close{
  position:absolute; top:18px; right:22px; width:42px; height:42px;
  border:1px solid rgba(255,255,255,.35); border-radius:50%;
  color:#fff; font-size:20px; line-height:40px; text-align:center; cursor:pointer;
  background:rgba(255,255,255,.06);
}
.zoomable{ cursor:zoom-in; }

/* ---------- 视频专区 ---------- */
.video-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:24px; max-width:860px; }
.video-grid figure{ margin:0; }
.video-card{
  position:relative; display:block; width:100%; aspect-ratio:9/16; max-height:640px;
  background:#0A1622; border:1px solid var(--line); border-radius:var(--radius-lg);
  overflow:hidden; object-fit:cover;
}
.video-card.landscape{ aspect-ratio:16/9; max-height:none; }
.video-card::-webkit-media-controls-panel{ background:linear-gradient(transparent,rgba(0,0,0,.5)); }
.video-grid figcaption{ margin-top:12px; font-size:13.5px; color:var(--ink-3); letter-spacing:.04em; }
.video-grid figcaption b{ color:var(--ink); }

/* 视频自定义全屏（竖屏友好，规避安卓系统播放器强制横屏） */
.vwrap{ position:relative; }
.vfs{
  position:absolute; right:10px; top:10px; z-index:3;
  width:36px; height:36px; padding:0; border:0; border-radius:9px; cursor:pointer;
  background:rgba(10,22,34,.62); color:#fff; font-size:14px; line-height:1;
  display:flex; align-items:center; justify-content:center;
  -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px);
  transition:background .2s var(--ease), opacity .2s var(--ease);
}
.vfs:hover{ background:rgba(10,22,34,.88); }
.vpic.vfull{
  position:fixed; inset:0; width:100vw; height:100vh; max-height:none;
  aspect-ratio:auto; border:0; border-radius:0; z-index:10000;
  object-fit:contain; background:#000;
}
.vfs.on{ position:fixed; top:16px; right:16px; z-index:10001; width:40px; height:40px; font-size:17px; }
body.vlocked{ overflow:hidden; }

/* ---------- 滚动揭示 ---------- */
.rv{ opacity:0; transform:translateY(16px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
.rv.in{ opacity:1; transform:none; }

/* ---------- 杂项 ---------- */
.divider{ height:1px; background:var(--line); }
.badge-line{
  display:inline-flex; align-items:center; gap:10px; font-size:12px; letter-spacing:.14em;
  text-transform:uppercase; color:rgba(255,255,255,.7);
  border:1px solid rgba(255,255,255,.18); padding:6px 14px; border-radius:2px;
}
.badge-line i{ width:5px; height:5px; border-radius:50%; background:var(--accent); display:block; }
.quote-block{ border-left:2px solid var(--accent); padding-left:26px; }
.quote-block p{ font-family:var(--serif); font-size:19px; line-height:1.8; color:var(--navy); }

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .nav > a{ padding:10px 11px; font-size:14px; }
  .hero-grid{ grid-template-columns:1fr; gap:44px; }
  .figures{ grid-template-columns:repeat(2,1fr); gap:32px 0; }
  .figures .fig:nth-child(3){ border-left:0; padding-left:0; }
  .grid-4{ grid-template-columns:repeat(2,1fr); }
  .foot-top{ grid-template-columns:1fr 1fr 1fr; }
}
@media (max-width:900px){
  header.site .wrap{ flex-wrap:wrap; height:auto; min-height:60px; padding-top:8px; row-gap:0; }
  .nav{
    display:flex; order:3; width:100%; overflow-x:auto; -webkit-overflow-scrolling:touch;
    scrollbar-width:none; border-top:1px solid var(--line-2); gap:0;
  }
  .nav::-webkit-scrollbar{ display:none; }
  .nav > a{ flex:none; padding:11px 13px; font-size:14px; }
  .nav-right{ margin-left:auto; }
  .nav-right .btn-outline{ display:none; }
  .burger{ display:none; }
  .mmenu{ display:none !important; }
  .topbar{ display:none; }
  .sec{ padding:72px 0; }
  .grid-3,.grid-2{ grid-template-columns:1fr; }
  .case{ grid-template-columns:1fr !important; }
  .case-media{ min-height:200px !important; }
  .newslayout,.casegrid,.casepair{ grid-template-columns:1fr !important; gap:24px !important; }
  .stack{ grid-template-columns:1fr !important; gap:34px !important; }
  .video-grid{ grid-template-columns:1fr; max-width:420px; }
  .gallery{ grid-template-columns:repeat(3,1fr) !important; }
  .gallery figure{ aspect-ratio:1/1; }
  .cert-grid{ grid-template-columns:1fr; }
  .cred-list{ grid-template-columns:1fr; }
  .photo-strip{ grid-template-columns:1fr; }
  .hero-banner{ aspect-ratio:16/9; }
  .casepair > .case{ margin:0 !important; }
  .newsitem{ grid-template-columns:1fr; gap:8px; }
  .newsitem .nc{ text-align:left; }
  .info-row{ grid-template-columns:1fr; }
  .form-grid{ grid-template-columns:1fr; }
  .sec-head{ flex-direction:column; align-items:flex-start; gap:22px; }
  .split2,.intro-grid{ grid-template-columns:1fr !important; gap:38px !important; }
  .split2 .split2-media{ position:static; }
  .steps{ grid-template-columns:1fr 1fr; }
  .step{ border-bottom:1px solid var(--line); }
  .clients .wrap{ flex-direction:column; gap:20px; align-items:flex-start; }
  .client-row{ gap:20px; }
  .foot-top{ grid-template-columns:1fr 1fr; gap:32px; }
}
@media (max-width:620px){
  .wrap{ padding:0 20px; }
  .nav-right .btn{ display:none; }
  header.site .wrap{ gap:12px; height:auto; }
  .nav > a{ padding:10px 11px; font-size:13.5px; }
  .logo-img{ height:36px; }
  .logo-txt b{ font-size:16px; }
  .logo-txt span{ display:none; }
  .gallery{ grid-template-columns:repeat(2,1fr) !important; }
  .hero .wrap{ padding-top:64px; padding-bottom:64px; }
  .hero-actions .btn{ flex:1 1 100%; }
  .hero-tags{ gap:20px; }
  .grid-4{ grid-template-columns:1fr; }
  .figures{ grid-template-columns:1fr; }
  .figures .fig{ border-left:0; padding-left:0; }
  .biz{ padding:30px 24px 34px; }
  .ctabar .wrap{ flex-direction:column; align-items:flex-start; }
  .foot-top{ grid-template-columns:1fr; }
  .foot-bot{ flex-direction:column; align-items:flex-start; }
  .case-body{ padding:28px 24px; }
}
@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; }
  .rv{ opacity:1; transform:none; }
  html{ scroll-behavior:auto; }
}