/* ==========================================================================
   会计企业官网 主样式表
   主色：深蓝 #1a3a5c  点缀：金 #c9a84c
   ========================================================================== */
:root{
  --navy:#1a3a5c; --navy-d:#12293f; --navy-l:#274b73;
  --gold:#c9a84c; --gold-l:#dcbd6e;
  --ink:#2b3440; --gray:#6b7684; --line:#e5eaf0;
  --bg:#ffffff; --bg-soft:#f5f7fa;
  --radius:12px; --shadow:0 6px 24px rgba(18,41,63,.08); --shadow-lg:0 16px 44px rgba(18,41,63,.16);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"Noto Sans SC","Source Han Sans SC","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s}
ul{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.center{text-align:center}
.mt40{margin-top:40px}
.ic{width:1em;height:1em;vertical-align:-.125em}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:12px 30px;border-radius:8px;font-size:15px;font-weight:600;letter-spacing:.03em;cursor:pointer;border:2px solid transparent;transition:all .25s;line-height:1.4}
.btn-gold{background:var(--gold);color:#fff}
.btn-gold:hover{background:var(--gold-l);transform:translateY(-2px);box-shadow:0 8px 20px rgba(201,168,76,.4)}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:var(--navy-l);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-ghost{border-color:rgba(255,255,255,.65);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-ghost-dark{border-color:var(--line);color:var(--navy)}
.btn-ghost-dark:hover{border-color:var(--navy);background:var(--navy);color:#fff}
.btn-lg{padding:15px 40px;font-size:16px}
.btn-block{display:block;width:100%}

/* ---------- 头部导航 ---------- */
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid transparent;transition:box-shadow .3s,border-color .3s}
.site-header.scrolled{box-shadow:var(--shadow);border-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:44px;width:auto}
.logo-mark{width:42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--navy),var(--navy-l));color:var(--gold);font-size:22px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:none}
.logo-text{font-size:20px;font-weight:700;color:var(--navy);display:flex;flex-direction:column;line-height:1.2}
.logo-text small{font-size:11px;font-weight:400;color:var(--gray);letter-spacing:.12em}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav>a{padding:8px 16px;border-radius:6px;font-size:15px;color:var(--ink);position:relative;transition:color .2s}
.main-nav>a:hover{color:var(--navy)}
.main-nav>a.active{color:var(--navy);font-weight:600}
.main-nav>a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:3px;border-radius:2px;background:var(--gold)}
.main-nav .nav-cta{background:var(--navy);color:#fff;margin-left:10px;padding:9px 22px;border-radius:8px}
.main-nav .nav-cta:hover{background:var(--gold)}
.nav-toggle{display:none;background:none;border:none;font-size:26px;color:var(--navy);cursor:pointer;padding:4px 10px}

/* ---------- Hero 轮播 ---------- */
.hero{position:relative;height:min(600px,78vh);min-height:420px;overflow:hidden;background:var(--navy-d)}
.hero-slide{position:absolute;inset:0;display:flex;align-items:center;opacity:0;transition:opacity .9s ease;background-size:cover;background-position:center}
.hero-slide.active{opacity:1}
.hero-content{max-width:760px;color:#fff}
.hero-content h1{font-size:clamp(28px,4.4vw,46px);font-weight:800;line-height:1.3;text-shadow:0 2px 14px rgba(0,0,0,.35)}
.hero-content p{font-size:clamp(15px,1.8vw,19px);margin:18px 0 30px;opacity:.92;text-shadow:0 1px 8px rgba(0,0,0,.3)}
.hero-content .btn{margin-right:14px;margin-bottom:8px}
.hero-dots{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.hero-dots .dot{width:34px;height:4px;border-radius:2px;border:none;background:rgba(255,255,255,.4);cursor:pointer;transition:background .25s;padding:0}
.hero-dots .dot.active{background:var(--gold)}

/* ---------- 区块通用 ---------- */
.section{padding:84px 0}
.bg-light{background:var(--bg-soft)}
.section-head{text-align:center;max-width:640px;margin:0 auto 52px}
.section-tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.28em;color:var(--gold);text-transform:uppercase;margin-bottom:10px}
.section-head h2{font-size:clamp(24px,3vw,32px);color:var(--navy);font-weight:800}
.section-head p{color:var(--gray);margin-top:12px}

/* ---------- 核心优势 ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 26px;text-align:center;transition:transform .25s,box-shadow .25s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.fc-icon{display:inline-flex;align-items:center;justify-content:center;width:62px;height:62px;border-radius:16px;background:rgba(26,58,92,.07);color:var(--navy);font-size:28px;margin-bottom:18px;transition:all .25s}
.feature-card:hover .fc-icon{background:var(--gold);color:#fff}
.feature-card h3{font-size:18px;color:var(--navy);margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--gray)}

/* ---------- 服务卡片 ---------- */
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.service-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s;position:relative;overflow:hidden}
.service-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--navy),var(--gold));transform:scaleX(0);transform-origin:left;transition:transform .3s}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.service-card:hover::before{transform:scaleX(1)}
.sc-icon{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:14px;background:rgba(201,168,76,.12);color:var(--gold);font-size:26px;margin-bottom:16px;transition:all .25s}
.service-card:hover .sc-icon{background:var(--navy);color:var(--gold)}
.service-card h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.service-card p{font-size:14px;color:var(--gray);flex:1}
.sc-more{margin-top:14px;font-size:13px;color:var(--gold);font-weight:600}

/* ---------- 服务列表页 ---------- */
.service-list{display:flex;flex-direction:column;gap:22px}
.service-row{display:flex;align-items:center;gap:30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 36px;position:relative;transition:transform .25s,box-shadow .25s}
.service-row:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(201,168,76,.4)}
.service-row.reverse{flex-direction:row-reverse;text-align:right}
.service-row.reverse .sr-body{text-align:right}
.sr-icon{flex:none;width:72px;height:72px;border-radius:18px;background:linear-gradient(135deg,rgba(26,58,92,.08),rgba(201,168,76,.14));color:var(--navy);display:flex;align-items:center;justify-content:center;font-size:34px;transition:all .25s}
.service-row:hover .sr-icon{background:var(--navy);color:var(--gold)}
.sr-body{flex:1}
.sr-body h3{font-size:20px;color:var(--navy);margin-bottom:6px}
.sr-body p{color:var(--gray);font-size:15px}
.sr-index{position:absolute;top:14px;right:22px;font-size:44px;font-weight:800;color:rgba(26,58,92,.06);line-height:1}
.service-row.reverse .sr-index{right:auto;left:22px}

/* ---------- 数字业绩 ---------- */
.stats-band{background:linear-gradient(135deg,var(--navy-d),var(--navy) 60%,var(--navy-l));padding:64px 0;color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-num{font-size:clamp(34px,4vw,50px);font-weight:800;color:var(--gold);font-variant-numeric:tabular-nums}
.stat-suffix{font-size:clamp(18px,2vw,24px);font-weight:700;color:var(--gold)}
.stat-item p{margin-top:6px;opacity:.85;font-size:15px}

/* ---------- 团队 ---------- */
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.team-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 22px;text-align:center;transition:transform .25s,box-shadow .25s}
.team-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.tc-avatar{width:96px;height:96px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid var(--bg-soft)}
.tc-placeholder{display:flex;align-items:center;justify-content:center;font-size:36px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--navy),var(--navy-l))}
.team-card h3{font-size:18px;color:var(--navy)}
.tc-pos{display:inline-block;font-size:13px;color:var(--gold);font-weight:600;margin:6px 0 10px}
.team-card p{font-size:14px;color:var(--gray)}

/* ---------- 新闻 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.nc-cover{height:170px;background:var(--bg-soft);overflow:hidden}
.nc-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.news-card:hover .nc-cover img{transform:scale(1.06)}
.nc-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:40px;color:rgba(26,58,92,.2);background:linear-gradient(135deg,#eef2f7,#e4eaf2)}
.nc-body{padding:20px;display:flex;flex-direction:column;flex:1}
.nc-cate{align-self:flex-start;font-size:12px;color:var(--gold);background:rgba(201,168,76,.1);padding:3px 10px;border-radius:20px;font-weight:600}
.news-card h3,.news-row h3{font-size:16px;color:var(--navy);margin:10px 0 8px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card p{font-size:13.5px;color:var(--gray);flex:1}
.news-card time{font-size:12.5px;color:#9aa4b0;margin-top:12px}
.news-card:hover h3,.news-row:hover h3{color:var(--gold)}

/* 新闻列表页 */
.two-col{display:grid;grid-template-columns:1fr 300px;gap:40px;padding-top:44px;padding-bottom:84px;align-items:start}
.cate-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.cate-tabs a{padding:7px 18px;border:1px solid var(--line);border-radius:30px;font-size:14px;color:var(--gray);transition:all .2s}
.cate-tabs a:hover{border-color:var(--navy);color:var(--navy)}
.cate-tabs a.active{background:var(--navy);border-color:var(--navy);color:#fff}
.news-row{display:flex;gap:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:18px;transition:transform .2s,box-shadow .2s;align-items:center}
.news-row:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.nr-cover{flex:none;width:200px;height:130px;border-radius:8px;overflow:hidden;background:var(--bg-soft)}
.nr-cover img{width:100%;height:100%;object-fit:cover}
.nr-body{flex:1;min-width:0}
.nr-meta{display:flex;gap:14px;align-items:center;font-size:13px;color:#9aa4b0}
.nr-meta time{order:2}
.nr-body p{font-size:14px;color:var(--gray);margin-top:6px}
.nr-date{flex:none;width:64px;text-align:center;background:var(--bg-soft);border-radius:10px;padding:10px 0}
.nr-date b{display:block;font-size:24px;color:var(--navy);line-height:1.2}
.nr-date span{font-size:12px;color:var(--gray)}
.empty-tip{text-align:center;color:var(--gray);padding:60px 0;background:#fff;border:1px dashed var(--line);border-radius:var(--radius)}
.pagination{display:flex;gap:8px;justify-content:center;margin-top:34px;flex-wrap:wrap}
.pagination a{min-width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:8px;font-size:14px;color:var(--gray);background:#fff;transition:all .2s;padding:0 6px}
.pagination a:hover{border-color:var(--navy);color:var(--navy)}
.pagination a.active{background:var(--navy);border-color:var(--navy);color:#fff;font-weight:600}

/* 侧栏 */
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;margin-bottom:24px}
.side-card h3{font-size:17px;color:var(--navy);margin-bottom:12px;position:relative;padding-left:12px}
.side-card h3::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:2px;background:var(--gold)}
.side-card p{font-size:14px;color:var(--gray);margin-bottom:14px}
.side-list li+li{margin-top:2px}
.side-list a{display:block;padding:9px 12px;border-radius:8px;font-size:14.5px;color:var(--ink);transition:all .2s}
.side-list a:hover{background:var(--bg-soft);color:var(--navy)}
.side-tel{margin-top:14px;font-size:15px;color:var(--navy);font-weight:600;display:flex;align-items:center;gap:8px}
.side-cta{background:linear-gradient(150deg,var(--navy-d),var(--navy-l));border:none;color:#fff}
.side-cta h3{color:#fff}.side-cta h3::before{background:var(--gold)}
.side-cta p{color:rgba(255,255,255,.75)}

/* ---------- 文章 ---------- */
.article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:44px 48px}
.article-title{font-size:26px;color:var(--navy);line-height:1.45}
.article-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13.5px;color:#9aa4b0;margin:16px 0 26px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.article-cover{border-radius:10px;margin-bottom:28px;max-height:380px;width:100%;object-fit:cover}
.article-nav{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:36px;padding-top:20px;font-size:14px;color:var(--gray)}
.article-nav a{color:var(--navy)}.article-nav a:hover{color:var(--gold)}
.article-back{margin-top:26px;text-align:center}

/* ---------- 富文本 ---------- */
.prose{font-size:16px;color:#3d4756;line-height:1.95}
.prose-title{font-size:24px;color:var(--navy);margin-bottom:20px;position:relative;padding-left:16px}
.prose-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:3px;background:linear-gradient(var(--navy),var(--gold))}
.prose h2,.prose h3,.prose h4{color:var(--navy);margin:28px 0 14px;line-height:1.5}
.prose h2{font-size:21px}.prose h3{font-size:18px}.prose h4{font-size:16px}
.prose p{margin-bottom:14px}
.prose ul,.prose ol{margin:0 0 16px 22px}
.prose ul{list-style:disc}.prose ol{list-style:decimal}
.prose li{margin-bottom:6px}
.prose img{border-radius:10px;margin:16px auto}
.prose blockquote{border-left:4px solid var(--gold);background:var(--bg-soft);padding:14px 20px;margin:18px 0;border-radius:0 10px 10px 0;color:var(--gray)}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px}
.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.prose th{background:var(--navy);color:#fff;font-weight:600}
.prose tr:nth-child(even) td{background:var(--bg-soft)}
.prose a{color:var(--navy);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--gold)}

/* ---------- 关于页 ---------- */
.page-banner{background:linear-gradient(135deg,var(--navy-d),var(--navy) 60%,var(--navy-l));padding:64px 0 58px;color:#fff;text-align:center}
.page-banner h1{font-size:clamp(26px,3.4vw,38px);font-weight:800}
.page-banner p{opacity:.8;margin-top:10px}
.breadcrumb{padding:18px 20px;font-size:14px;color:var(--gray)}
.breadcrumb a:hover{color:var(--navy)}
.breadcrumb span{color:var(--navy)}
.timeline{position:relative;max-width:760px;margin:0 auto;padding-left:30px}
.timeline::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--gold),var(--line))}
.tl-item{position:relative;padding-bottom:30px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:-30px;top:6px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid var(--gold)}
.tl-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 24px;box-shadow:var(--shadow);transition:transform .2s}
.tl-card:hover{transform:translateX(6px)}
.tl-card b{color:var(--gold);font-size:17px}
.tl-card p{color:var(--gray);font-size:14.5px;margin-top:4px}
.culture-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.culture-card{background:var(--bg-soft);border-radius:var(--radius);padding:30px 22px;text-align:center;transition:all .25s}
.culture-card:hover{background:#fff;box-shadow:var(--shadow-lg);transform:translateY(-5px)}
.culture-card i{color:var(--gold);font-size:26px;display:block;margin-bottom:12px}
.culture-card h3{color:var(--navy);font-size:17px;margin-bottom:8px}
.culture-card p{color:var(--gray);font-size:14px}
.honor-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.honor-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:all .25s;text-align:center}
.honor-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.hc-img{height:190px;background:var(--bg-soft)}
.hc-img img{width:100%;height:100%;object-fit:cover}
.honor-card p{padding:14px;font-size:14px;color:var(--navy);font-weight:600}

/* ---------- 服务详情适用群体 ---------- */
.suitable-box{margin-top:34px;background:linear-gradient(135deg,rgba(26,58,92,.05),rgba(201,168,76,.08));border:1px dashed rgba(201,168,76,.5);border-radius:var(--radius);padding:24px 28px}
.suitable-box h3{color:var(--navy);font-size:17px;display:flex;align-items:center;gap:8px;margin-bottom:8px}
.suitable-box h3 .ic{color:var(--gold);font-size:20px}
.suitable-box p{color:var(--gray);font-size:15px}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:5fr 6fr;gap:44px;align-items:start}
.contact-info h2,.contact-form-wrap h2{font-size:24px;color:var(--navy);margin-bottom:26px}
.ci-item{display:flex;gap:16px;margin-bottom:22px}
.ci-item i{flex:none;width:48px;height:48px;border-radius:12px;background:rgba(26,58,92,.07);color:var(--navy);display:flex;align-items:center;justify-content:center;font-size:22px}
.ci-item b{color:var(--navy);font-size:15px}
.ci-item p{color:var(--gray);font-size:14.5px;margin-top:2px}
.map-box{margin-top:10px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);height:300px}
.map-box iframe{width:100%;height:100%;border:0}
.contact-form-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:38px 36px;box-shadow:var(--shadow)}
.contact-form-wrap form label{display:block;font-size:14.5px;color:var(--navy);font-weight:600;margin-bottom:18px}
.contact-form-wrap em{color:#d64545;font-style:normal}
.contact-form-wrap input,.contact-form-wrap textarea{display:block;width:100%;margin-top:8px;padding:12px 14px;border:1.5px solid var(--line);border-radius:8px;font-size:15px;font-family:inherit;color:var(--ink);transition:border-color .2s,box-shadow .2s;background:#fff}
.contact-form-wrap input:focus,.contact-form-wrap textarea:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(26,58,92,.1)}
.contact-form-wrap input.invalid,.contact-form-wrap textarea.invalid{border-color:#d64545}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-tip{font-size:12.5px;color:#9aa4b0;text-align:center;margin-top:14px}
.alert{padding:13px 18px;border-radius:8px;font-size:14.5px;margin-bottom:20px}
.alert-ok{background:rgba(34,160,94,.1);color:#1d7a49;border:1px solid rgba(34,160,94,.3)}
.alert-err{background:rgba(214,69,69,.08);color:#b03535;border:1px solid rgba(214,69,69,.25)}

/* ---------- CTA ---------- */
.cta-band{background:linear-gradient(135deg,var(--navy-d),var(--navy) 55%,var(--navy-l));padding:58px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px;color:#fff;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px)}
.cta-inner p{opacity:.8;margin-top:8px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--navy-d);color:rgba(255,255,255,.72);font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:2.2fr 1fr 1.4fr 1.6fr;gap:40px;padding:60px 20px 44px}
.footer-logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-about p{line-height:1.9}
.footer-tel{color:var(--gold);font-weight:600;margin-top:10px;font-size:16px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;background:var(--gold)}
.footer-col a,.footer-col p{display:block;margin-bottom:10px;color:rgba(255,255,255,.66);transition:color .2s}
.footer-col a:hover{color:var(--gold)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.09);padding:18px 0;font-size:13px;color:rgba(255,255,255,.45)}
.footer-bottom .container{display:flex;justify-content:center}
.footer-bottom a{color:rgba(255,255,255,.55);margin-left:14px}
.footer-bottom a:hover{color:var(--gold)}

/* ---------- 返回顶部 ---------- */
.back-top{position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:50%;border:none;background:var(--navy);color:#fff;font-size:20px;cursor:pointer;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s;z-index:90}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--gold)}

/* ---------- 404 ---------- */
.page-404{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:var(--bg-soft);text-align:center;padding:20px}
.page-404 h1{font-size:88px;font-weight:800;color:var(--navy)}
.page-404 p{color:var(--gray)}
.page-404 .btn{margin:8px 6px 0}

/* ---------- 渐入动效 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .feature-grid,.service-grid,.stats-grid,.team-grid,.news-grid,.culture-grid,.honor-grid{grid-template-columns:repeat(2,1fr)}
  .two-col{grid-template-columns:1fr 260px}
}
@media (max-width:900px){
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .article{padding:30px 24px}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .header-inner{height:64px}
  .nav-toggle{display:block}
  .main-nav{position:fixed;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 20px 20px;gap:2px;box-shadow:var(--shadow-lg);transform:translateY(-130%);transition:transform .3s;z-index:99}
  .main-nav.open{transform:none}
  .main-nav>a{padding:13px 14px;border-bottom:1px solid var(--bg-soft)}
  .main-nav>a.active::after{display:none}
  .main-nav>a.active{color:var(--gold)}
  .main-nav .nav-cta{margin:12px 0 0;text-align:center}
  .hero{min-height:380px;height:66vh}
  .two-col{grid-template-columns:1fr;padding-top:28px}
  .news-row{flex-direction:column;align-items:stretch}
  .nr-cover{width:100%;height:180px}
  .nr-date{display:none}
  .service-row,.service-row.reverse{flex-direction:row;text-align:left;padding:22px}
  .service-row.reverse .sr-body{text-align:left}
  .sr-icon{width:54px;height:54px;font-size:25px}
  .sr-index{font-size:30px}
  .form-row{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;text-align:center;justify-content:center}
  .back-top{right:16px;bottom:16px}
}
@media (max-width:480px){
  .feature-grid,.service-grid,.stats-grid,.team-grid,.news-grid,.culture-grid,.honor-grid,.footer-grid{grid-template-columns:1fr}
  .stats-grid{gap:30px}
  .hero-content .btn{display:block;margin:0 0 12px;max-width:260px}
}