/* ============================================================
   国晟集团官网 · 设计系统（方案7：森林翠绿 + 大地金 + 象牙白）
   GUOSHENG GROUP — Global Corporate Website
   ============================================================ */
:root{
  /* 品牌色 */
  --green:#2D936C;          /* 主色 森林翠绿 */
  --green-deep:#1B4D3E;     /* 深绿（深色区块/页脚） */
  --green-dark:#1F6E4F;     /* 主色按下态 */
  --green-tint:#E9F3EE;     /* 浅绿背景 */
  --gold:#C9A227;           /* 大地金 */
  --gold-deep:#A8861C;      /* 深金 */
  --gold-tint:#F6EED7;      /* 浅金背景 */
  --ivory:#FBF9F3;          /* 象牙白 页面底 */
  --white:#FFFFFF;
  /* 文字 */
  --ink:#172923;            /* 主文字 墨绿黑 */
  --ink-2:#46574F;          /* 次文字 */
  --ink-3:#7A8881;          /* 弱文字 */
  --line:#E7E2D6;           /* 描边 */
  --line-dark:rgba(255,255,255,.14);
  /* 效果 */
  --shadow-sm:0 2px 10px rgba(27,77,62,.06);
  --shadow:0 10px 34px rgba(27,77,62,.10);
  --shadow-lg:0 22px 60px rgba(27,77,62,.16);
  --radius:14px;
  --radius-sm:9px;
  --maxw:1200px;
  --nav-h:76px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--ivory);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s,background .25s,border-color .25s,opacity .25s,transform .25s}
ul,ol{list-style:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.3;color:var(--ink)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 28px}
::selection{background:var(--gold);color:#fff}

/* ---------- 通用区块 ---------- */
section{padding:88px 0}
.sec-head{max-width:760px;margin-bottom:52px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:3px;color:var(--gold-deep);text-transform:uppercase;margin-bottom:16px}
.kicker::before{content:"";width:30px;height:2px;background:var(--gold)}
.sec-head.center .kicker{justify-content:center}
.sec-head.center .kicker::after{content:"";width:30px;height:2px;background:var(--gold)}
.sec-head h2{font-size:38px;letter-spacing:1px;margin-bottom:14px}
.sec-head h2 em{font-style:normal;color:var(--green);position:relative}
.sec-head .en{font-family:var(--sans);font-size:13px;letter-spacing:3px;color:var(--ink-3);font-weight:500;text-transform:uppercase}
.sec-head .lead{margin-top:18px;color:var(--ink-2);font-size:16.5px;line-height:1.9}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:700;letter-spacing:1px;transition:.28s;white-space:nowrap}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 8px 20px rgba(45,147,108,.28)}
.btn-primary:hover{background:var(--green-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(45,147,108,.36)}
.btn-gold{background:var(--gold);color:#fff;box-shadow:0 8px 20px rgba(201,162,39,.26)}
.btn-gold:hover{background:var(--gold-deep);transform:translateY(-2px)}
.btn-outline{border:1.5px solid var(--green);color:var(--green);background:rgba(255,255,255,.06)}
.btn-outline:hover{background:var(--green);color:#fff}
.btn-ghost-line{border:1.5px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost-line:hover{background:#fff;color:var(--green-deep);border-color:#fff}
.btn .arr{transition:transform .25s}
.btn:hover .arr{transform:translateX(4px)}

/* ---------- 顶部导航 ---------- */
.topbar{background:var(--green-deep);color:rgba(255,255,255,.82);font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:rgba(255,255,255,.82)}
.topbar a:hover{color:var(--gold)}
.topbar .tb-l{display:flex;gap:26px;align-items:center}
.topbar .tb-r{display:flex;gap:20px;align-items:center}
.nav{position:sticky;top:0;z-index:1000;background:rgba(251,249,243,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:.3s}
.nav.solid{background:#fff;box-shadow:var(--shadow-sm)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:24px}
.nav-logo img{height:44px;width:auto}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{padding:9px 15px;font-size:15.5px;font-weight:600;color:var(--ink);border-radius:8px;position:relative}
.nav-menu a:hover,.nav-menu a.active{color:var(--green)}
.nav-menu a.active::after{content:"";position:absolute;left:15px;right:15px;bottom:2px;height:2px;background:var(--gold);border-radius:2px}
.nav-tools{display:flex;align-items:center;gap:14px}
.lang-switch{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-size:13px;font-weight:700}
.lang-switch button{padding:6px 13px;color:var(--ink-3)}
.lang-switch button.on{background:var(--green);color:#fff}
.nav-cta{padding:10px 22px;font-size:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* ---------- 页脚 ---------- */
.footer{background:var(--green-deep);color:rgba(255,255,255,.74);padding:72px 0 0;margin-top:0}
.footer .f-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:48px;padding-bottom:52px;border-bottom:1px solid var(--line-dark)}
.footer img.f-logo{height:48px;margin-bottom:22px}
.footer .f-about{font-size:14px;line-height:1.95;max-width:330px}
.footer h4{color:#fff;font-size:16px;margin-bottom:22px;font-family:var(--sans);font-weight:700;letter-spacing:1px}
.footer .f-links a{display:block;padding:7px 0;font-size:14.5px;color:rgba(255,255,255,.72)}
.footer .f-links a:hover{color:var(--gold);padding-left:6px}
.footer .f-contact li{display:flex;gap:11px;align-items:flex-start;padding:8px 0;font-size:14.5px}
.footer .f-contact .ic{color:var(--gold);margin-top:3px;flex:none}
.footer .f-qr{display:flex;gap:16px;align-items:center;margin-top:6px}
.footer .f-qr img{width:96px;height:96px;border-radius:10px;background:#fff;padding:7px}
.footer .f-qr .qt{font-size:13px;line-height:1.7;color:rgba(255,255,255,.66)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:22px 0;font-size:13px;color:rgba(255,255,255,.5);flex-wrap:wrap;gap:10px}
.footer-bottom a{color:rgba(255,255,255,.5)}
.footer-bottom a:hover{color:var(--gold)}

/* ---------- 动画 ---------- */
.rv{opacity:0;transform:translateY(34px);transition:opacity .8s ease,transform .8s ease}
.rv.in{opacity:1;transform:none}
.rv.d1{transition-delay:.1s}.rv.d2{transition-delay:.2s}.rv.d3{transition-delay:.3s}.rv.d4{transition-delay:.4s}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ---------- 面包屑/页面横幅（内页） ---------- */
.page-hero{background:linear-gradient(125deg,var(--green-deep) 0%,#23604E 55%,var(--green) 100%);color:#fff;padding:74px 0 66px;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border:1px solid rgba(201,162,39,.35);border-radius:50%}
.page-hero::before{content:"";position:absolute;right:-40px;bottom:-180px;width:360px;height:360px;border:1px solid rgba(255,255,255,.12);border-radius:50%}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{color:#fff;font-size:42px;letter-spacing:2px;margin-bottom:12px}
.page-hero .ph-en{color:var(--gold);letter-spacing:4px;font-size:13px;font-weight:600;text-transform:uppercase;margin-bottom:18px}
.page-hero p{max-width:680px;color:rgba(255,255,255,.85);font-size:16.5px;line-height:1.9}
.crumb{font-size:13.5px;color:rgba(255,255,255,.6);margin-top:22px}
.crumb a:hover{color:var(--gold)}
.crumb span{margin:0 9px;opacity:.5}

/* ---------- 通用卡片 ---------- */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;transition:.3s;box-shadow:var(--shadow-sm)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(201,162,39,.4)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.tag{display:inline-block;padding:4px 13px;border-radius:999px;font-size:12.5px;font-weight:600;background:var(--green-tint);color:var(--green-dark);letter-spacing:.5px}
.tag.gold{background:var(--gold-tint);color:var(--gold-deep)}

/* ---------- 数据数字 ---------- */
.stat-num{font-family:var(--serif);font-size:42px;font-weight:700;color:var(--green);line-height:1}
.stat-num .u{font-size:20px;margin-left:3px;color:var(--gold-deep)}
.stat-label{font-size:14px;color:var(--ink-2);margin-top:10px}

/* ---------- 分区深浅 ---------- */
.bg-white{background:#fff}
.bg-tint{background:var(--green-tint)}
.bg-ivory{background:var(--ivory)}
.bg-deep{background:var(--green-deep);color:rgba(255,255,255,.85)}
.bg-deep h2,.bg-deep h3,.bg-deep .stat-num{color:#fff}
.bg-deep .sec-head .en{color:rgba(255,255,255,.5)}
.text-gold{color:var(--gold)}
/* ============================================================
   首页 HERO
   ============================================================ */
.hero{position:relative;min-height:640px;display:flex;align-items:center;background:linear-gradient(115deg,#14392E 0%,#1B4D3E 48%,#23604E 100%);color:#fff;overflow:hidden;padding:90px 0}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.34}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(20,57,46,.94) 0%,rgba(27,77,62,.78) 45%,rgba(27,77,62,.35) 100%)}
.hero .container{position:relative;z-index:2;width:100%}
.hero-inner{max-width:660px}
.hero .h-kicker{display:inline-flex;align-items:center;gap:12px;color:var(--gold);font-weight:700;letter-spacing:4px;font-size:14px;margin-bottom:26px}
.hero .h-kicker::before{content:"";width:38px;height:2px;background:var(--gold)}
.hero h1{color:#fff;font-size:56px;line-height:1.22;letter-spacing:3px;margin-bottom:8px}
.hero h1 .hl{color:var(--gold)}
.hero .h-en{color:rgba(255,255,255,.55);letter-spacing:5px;font-size:14px;font-weight:500;margin-bottom:26px;text-transform:uppercase}
.hero p.h-sub{font-size:18px;line-height:2;color:rgba(255,255,255,.88);margin-bottom:38px;max-width:580px}
.hero-actions{display:flex;gap:18px;flex-wrap:wrap}
.hero-stats{position:relative;z-index:2;margin-top:64px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid rgba(255,255,255,.18)}
.hero-stats .hs{padding:24px 26px 4px 0;border-right:1px solid rgba(255,255,255,.14)}
.hero-stats .hs:last-child{border-right:none}
.hero-stats .hn{font-family:var(--serif);font-size:38px;font-weight:700;color:#fff}
.hero-stats .hn .u{font-size:17px;color:var(--gold);margin-left:2px}
.hero-stats .hl2{font-size:13.5px;color:rgba(255,255,255,.62);margin-top:6px;letter-spacing:1px}

/* ---------- 业务板块 ---------- */
.biz-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px 30px;overflow:hidden;transition:.32s;box-shadow:var(--shadow-sm)}
.biz-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--green),var(--gold));transform:scaleX(0);transform-origin:left;transition:.35s}
.biz-card:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.biz-card:hover::before{transform:scaleX(1)}
.biz-ic{width:60px;height:60px;border-radius:14px;background:var(--green-tint);display:flex;align-items:center;justify-content:center;color:var(--green);margin-bottom:22px}
.biz-card:nth-child(even) .biz-ic{background:var(--gold-tint);color:var(--gold-deep)}
.biz-ic svg{width:30px;height:30px}
.biz-card h3{font-size:21px;margin-bottom:12px}
.biz-card p{font-size:14.5px;color:var(--ink-2);line-height:1.85;margin-bottom:18px}
.biz-card .more{font-size:14px;font-weight:700;color:var(--green);display:inline-flex;gap:6px;align-items:center;white-space:nowrap;width:max-content}
.biz-card .more svg{width:17px;height:17px;flex:none}
.biz-card:hover .more{color:var(--gold-deep)}

/* ---------- 双技术核心 ---------- */
.tech-duo{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.tech-panel{border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow);border:1px solid var(--line)}
.tech-panel .tp-img{height:240px;position:relative;overflow:hidden}
.tech-panel .tp-img img{width:100%;height:100%;object-fit:cover;transition:.6s}
.tech-panel:hover .tp-img img{transform:scale(1.06)}
.tech-panel .tp-img .tp-tag{position:absolute;left:20px;top:20px;background:rgba(27,77,62,.9);color:#fff;padding:6px 16px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:1px}
.tech-panel .tp-body{padding:30px}
.tech-panel h3{font-size:23px;margin-bottom:12px}
.tech-panel p{color:var(--ink-2);font-size:14.5px;line-height:1.85;margin-bottom:20px}
.tp-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;padding-top:20px;border-top:1px dashed var(--line)}
.tp-metrics .m{text-align:center}
.tp-metrics .mv{font-family:var(--serif);font-size:24px;font-weight:700;color:var(--green)}
.tp-metrics .ml{font-size:12px;color:var(--ink-3);margin-top:5px}

/* ---------- 产业链流程 ---------- */
.chain{display:flex;align-items:stretch;gap:0;flex-wrap:wrap;justify-content:center}
.chain-node{flex:1;min-width:150px;max-width:200px;text-align:center;position:relative;padding:0 8px}
.chain-node .cn-circle{width:84px;height:84px;border-radius:50%;background:#fff;border:2px solid var(--green);color:var(--green);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-family:var(--serif);font-size:26px;font-weight:700;position:relative;z-index:2;transition:.3s}
.chain-node:hover .cn-circle{background:var(--green);color:#fff;box-shadow:0 0 0 8px var(--green-tint)}
.chain-node h4{font-size:16.5px;margin-bottom:7px}
.chain-node p{font-size:13px;color:var(--ink-2);line-height:1.7}
.chain-arrow{display:flex;align-items:center;color:var(--gold);font-size:26px;padding-top:24px}

/* ---------- 案例 ---------- */
.case-card{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);background:#fff;height:340px;display:flex;align-items:flex-end}
.case-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:.6s}
.case-card:hover img{transform:scale(1.07)}
.case-card .cc-mask{position:absolute;inset:0;background:linear-gradient(to top,rgba(15,40,32,.92) 0%,rgba(15,40,32,.35) 55%,transparent 100%)}
.case-card .cc-body{position:relative;z-index:2;padding:26px;color:#fff;width:100%}
.case-card .cc-loc{display:inline-block;font-size:12.5px;color:var(--gold);font-weight:700;letter-spacing:1px;margin-bottom:9px}
.case-card h3{color:#fff;font-size:20px;margin-bottom:7px}
.case-card p{font-size:13.5px;color:rgba(255,255,255,.8);line-height:1.7;max-height:0;overflow:hidden;opacity:0;transition:.4s}
.case-card:hover p{max-height:90px;opacity:1;margin-top:4px}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;max-width:900px;margin:0 auto}
.timeline::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(var(--green),var(--gold));transform:translateX(-50%)}
.tl-item{position:relative;width:50%;padding:0 44px 44px 0}
.tl-item:nth-child(even){left:50%;padding:0 0 44px 44px}
.tl-item .tl-dot{position:absolute;right:-9px;top:4px;width:18px;height:18px;border-radius:50%;background:var(--gold);border:4px solid var(--ivory);box-shadow:0 0 0 2px var(--gold)}
.tl-item:nth-child(even) .tl-dot{left:-9px;right:auto}
.tl-item .tl-year{font-family:var(--serif);font-size:26px;font-weight:700;color:var(--green)}
.tl-item .tl-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 24px;margin-top:10px;box-shadow:var(--shadow-sm)}
.tl-item .tl-card h4{font-size:16.5px;margin-bottom:6px}
.tl-item .tl-card p{font-size:14px;color:var(--ink-2);line-height:1.75}

/* ---------- 新闻 ---------- */
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;box-shadow:var(--shadow-sm);display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.news-card .nc-img{height:200px;overflow:hidden}
.news-card .nc-img img{width:100%;height:100%;object-fit:cover;transition:.6s}
.news-card:hover .nc-img img{transform:scale(1.06)}
.news-card .nc-body{padding:24px 26px;flex:1;display:flex;flex-direction:column}
.news-card .nc-meta{display:flex;gap:14px;font-size:12.5px;color:var(--ink-3);margin-bottom:12px}
.news-card .nc-meta .nc-cat{color:var(--gold-deep);font-weight:700}
.news-card h3{font-size:18px;line-height:1.55;margin-bottom:10px}
.news-card p{font-size:14px;color:var(--ink-2);line-height:1.8;flex:1}
.news-card .nc-date{margin-top:16px;font-size:13px;color:var(--ink-3)}

/* ---------- CTA ---------- */
.cta-band{position:relative;background:linear-gradient(120deg,var(--green-deep),#2A6B54);border-radius:24px;padding:64px 60px;color:#fff;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-band::after{content:"";position:absolute;right:-80px;top:-80px;width:300px;height:300px;border:1px solid rgba(201,162,39,.4);border-radius:50%}
.cta-band h2{color:#fff;font-size:32px;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.82);font-size:16px;max-width:560px;line-height:1.85}
.cta-band .cta-btns{display:flex;gap:16px;flex-wrap:wrap;position:relative;z-index:2}

/* ---------- 表单 ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-field{display:flex;flex-direction:column;gap:8px}
.form-field.full{grid-column:1/-1}
.form-field label{font-size:14px;font-weight:600;color:var(--ink)}
.form-field label .req{color:#C0392B;margin-left:3px}
.form-field input,.form-field select,.form-field textarea{font-family:inherit;font-size:15px;padding:13px 16px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:#fff;color:var(--ink);transition:.2s;width:100%}
.form-field textarea{resize:vertical;min-height:130px;line-height:1.7}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px var(--green-tint)}

/* ---------- 内页侧导航/目录 ---------- */
.anchor-nav{position:sticky;top:110px;display:flex;flex-direction:column;gap:4px}
.anchor-nav a{padding:11px 18px;border-left:2px solid var(--line);font-size:15px;color:var(--ink-2);font-weight:600}
.anchor-nav a:hover,.anchor-nav a.on{color:var(--green);border-left-color:var(--gold);background:var(--green-tint)}
.content-layout{display:grid;grid-template-columns:230px 1fr;gap:50px;align-items:start}
.prose h2{font-size:28px;margin:44px 0 18px;padding-bottom:14px;border-bottom:2px solid var(--gold-tint)}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:21px;margin:30px 0 12px;color:var(--green-deep)}
.prose p{color:var(--ink-2);line-height:2;margin-bottom:16px;font-size:16px}
.prose ul.li{margin:0 0 16px 0}
.prose ul.li li{position:relative;padding-left:26px;margin-bottom:11px;color:var(--ink-2);line-height:1.9}
.prose ul.li li::before{content:"";position:absolute;left:4px;top:11px;width:8px;height:8px;background:var(--gold);border-radius:2px;transform:rotate(45deg)}
.prose figure{margin:28px 0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}
.prose figure img{width:100%}
.prose figcaption{text-align:center;font-size:13.5px;color:var(--ink-3);padding:12px;background:#fff}
.spec-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px;background:#fff;border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow-sm)}
.spec-table th{background:var(--green-deep);color:#fff;padding:14px 18px;text-align:left;font-weight:600}
.spec-table td{padding:13px 18px;border-bottom:1px solid var(--line);color:var(--ink-2)}
.spec-table tr:nth-child(even) td{background:var(--ivory)}
.spec-table td:first-child{font-weight:600;color:var(--ink)}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer .f-grid{grid-template-columns:1fr 1fr;gap:36px}
  .hero h1{font-size:46px}
  .content-layout{grid-template-columns:1fr;gap:30px}
  .anchor-nav{position:static;flex-direction:row;flex-wrap:wrap}
  .anchor-nav a{border-left:none;border-bottom:2px solid var(--line)}
}
@media (max-width:860px){
  .topbar{display:none}
  .nav-menu{position:fixed;top:var(--nav-h);left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:14px;gap:2px;box-shadow:var(--shadow);transform:translateY(-130%);transition:.35s;opacity:0;visibility:hidden;max-height:calc(100vh - var(--nav-h));overflow-y:auto}
  .nav-menu.open{transform:none;opacity:1;visibility:visible}
  .nav-menu a{padding:14px 16px;font-size:16px;border-radius:10px}
  .nav-menu a.active::after{display:none}
  .nav-toggle{display:flex}
  .nav-tools .nav-cta{display:none}
  section{padding:60px 0}
  .sec-head h2{font-size:30px}
  .hero{min-height:auto;padding:70px 0}
  .hero h1{font-size:36px;letter-spacing:1px}
  .hero p.h-sub{font-size:16px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:18px 0;margin-top:44px}
  .hero-stats .hs{border-right:none}
  .grid-2,.grid-3,.tech-duo{grid-template-columns:1fr}
  .chain{flex-direction:column;align-items:center}
  .chain-arrow{transform:rotate(90deg);padding:6px 0}
  .chain-node{max-width:100%;width:100%;display:flex;gap:18px;text-align:left;align-items:center}
  .chain-node .cn-circle{margin:0;flex:none;width:64px;height:64px;font-size:20px}
  .timeline::before{left:9px}
  .tl-item,.tl-item:nth-child(even){width:100%;left:0;padding:0 0 32px 40px}
  .tl-item .tl-dot,.tl-item:nth-child(even) .tl-dot{left:0;right:auto}
  .form-grid{grid-template-columns:1fr}
  .cta-band{padding:44px 30px}
  .cta-band h2{font-size:26px}
  .page-hero h1{font-size:32px}
  .footer .f-grid{grid-template-columns:1fr;gap:32px}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .grid-4{grid-template-columns:1fr 1fr;gap:14px}
  .hero h1{font-size:31px}
  .hero-actions .btn{flex:1;justify-content:center;padding:13px 18px}
  .sec-head h2{font-size:26px}
  .stat-num{font-size:34px}
  .card{padding:24px}
  .cta-band{padding:36px 24px}
}

/* ============================================================
   后台 ADMIN
   ============================================================ */
.admin-body{background:#F0EEE8;font-family:var(--sans)}
.admin-layout{display:flex;min-height:100vh}
.admin-side{width:248px;background:var(--green-deep);color:rgba(255,255,255,.8);flex:none;position:fixed;top:0;bottom:0;left:0;overflow-y:auto;z-index:50}
.admin-side .as-logo{padding:24px;color:#fff;font-family:var(--serif);font-size:19px;font-weight:700;border-bottom:1px solid var(--line-dark);letter-spacing:1px}
.admin-side .as-logo small{display:block;font-family:var(--sans);font-size:11px;color:rgba(255,255,255,.5);letter-spacing:2px;margin-top:4px}
.admin-side nav a{display:flex;align-items:center;gap:12px;padding:14px 24px;font-size:14.5px;color:rgba(255,255,255,.72);border-left:3px solid transparent}
.admin-side nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.admin-side nav a.on{background:rgba(45,147,108,.25);color:#fff;border-left-color:var(--gold)}
.admin-main{flex:1;margin-left:248px;padding:30px 36px}
.admin-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px}
.admin-top h1{font-size:24px}
.panel{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);margin-bottom:24px}
.panel h3{font-size:17px;margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.admin-table{width:100%;border-collapse:collapse;font-size:14px}
.admin-table th{text-align:left;padding:12px 14px;background:var(--ivory);color:var(--ink-2);font-weight:600;font-size:13px;white-space:nowrap}
.admin-table td{padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.admin-table tr:hover td{background:#FCFBF7}
.btn-sm{padding:7px 15px;border-radius:7px;font-size:13px;font-weight:600}
.btn-danger{background:#FBEAE8;color:#C0392B}
.btn-danger:hover{background:#C0392B;color:#fff}
.btn-add{background:var(--green);color:#fff}
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--green-deep),#2A6B54)}
.login-box{background:#fff;border-radius:18px;padding:44px;width:380px;box-shadow:var(--shadow-lg)}
.login-box .lg-logo{text-align:center;margin-bottom:26px}
.login-box .lg-logo img{height:46px;margin:0 auto}
.login-box h2{text-align:center;font-size:21px;margin-bottom:6px}
.login-box p.sub{text-align:center;color:var(--ink-3);font-size:13.5px;margin-bottom:28px}
.toast{position:fixed;top:26px;right:26px;background:var(--green-deep);color:#fff;padding:15px 24px;border-radius:10px;box-shadow:var(--shadow);z-index:3000;opacity:0;transform:translateX(30px);transition:.3s;font-size:14.5px}
.toast.show{opacity:1;transform:none}
.toast.err{background:#C0392B}
.modal-mask{position:fixed;inset:0;background:rgba(20,40,34,.5);z-index:2000;display:none;align-items:center;justify-content:center;padding:30px}
.modal-mask.show{display:flex}
.modal{background:#fff;border-radius:16px;width:100%;max-width:600px;max-height:88vh;overflow-y:auto;padding:32px}
.modal h3{font-size:20px;margin-bottom:22px}
@media (max-width:860px){
  .admin-side{transform:translateX(-100%);transition:.3s}
  .admin-side.open{transform:none}
  .admin-main{margin-left:0;padding:20px 16px}
}

/* ---------- 合作伙伴墙 ---------- */
.partner-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.partner-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:26px 20px;text-align:center;font-weight:600;color:var(--green-deep);font-size:15.5px;letter-spacing:.5px;transition:.3s;position:relative}
.partner-item::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:var(--gold);transition:.3s}
.partner-item:hover{box-shadow:var(--shadow);transform:translateY(-4px);color:var(--gold-deep)}
.partner-item:hover::before{width:60%}

/* ---------- 招聘卡片 ---------- */
.job-card{display:flex;justify-content:space-between;align-items:center;gap:26px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 32px;margin-bottom:18px;transition:.3s;box-shadow:var(--shadow-sm)}
.job-card:hover{box-shadow:var(--shadow);border-color:rgba(201,162,39,.4)}
.jc-main{flex:1}
.jc-top{display:flex;align-items:center;gap:14px;margin-bottom:10px}
.jc-loc{font-size:13.5px;color:var(--ink-3);display:inline-flex;align-items:center;gap:5px}
.jc-loc svg{width:15px;height:15px;color:var(--gold)}
.job-card h3{font-size:20px;margin-bottom:10px}
.jc-meta{display:flex;gap:18px;font-size:13.5px;color:var(--ink-3);margin-bottom:12px;flex-wrap:wrap}
.job-card p{font-size:14.5px;color:var(--ink-2);line-height:1.8;margin:0}
@media (max-width:700px){.job-card{flex-direction:column;align-items:flex-start;gap:16px}.partner-grid{grid-template-columns:1fr}}

/* ---------- 联系布局 ---------- */
.contact-layout{display:grid;grid-template-columns:1fr 1.25fr;gap:40px;align-items:start}
.contact-info-card{background:linear-gradient(150deg,var(--green-deep),#2A6B54);color:#fff;border-radius:var(--radius);padding:40px;position:relative;overflow:hidden}
.contact-info-card::after{content:"";position:absolute;right:-70px;bottom:-70px;width:240px;height:240px;border:1px solid rgba(201,162,39,.35);border-radius:50%}
.contact-info-card h3{color:#fff;font-size:23px;margin-bottom:8px}
.contact-info-card .ci-sub{color:rgba(255,255,255,.7);font-size:14px;margin-bottom:30px}
.ci-row{display:flex;gap:15px;align-items:flex-start;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.12);position:relative;z-index:2}
.ci-row .ci-ic{width:42px;height:42px;border-radius:11px;background:rgba(255,255,255,.12);display:flex;align-items:center;justify-content:center;color:var(--gold);flex:none}
.ci-row .ci-ic svg{width:21px;height:21px}
.ci-row .ci-k{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:3px}
.ci-row .ci-v{font-size:15.5px;font-weight:600;line-height:1.6;word-break:break-all}
.contact-form-card{background:#fff;border-radius:var(--radius);padding:40px;box-shadow:var(--shadow-sm);border:1px solid var(--line)}
@media (max-width:900px){.contact-layout{grid-template-columns:1fr}}

/* ---------- 业务/技术详情块 ---------- */
.feature-row{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;margin-bottom:70px}
.feature-row.rev{direction:rtl}.feature-row.rev>*{direction:ltr}
.feature-row .fr-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);position:relative}
.feature-row .fr-img img{width:100%;height:340px;object-fit:cover}
.feature-row .fr-img .fr-badge{position:absolute;left:20px;bottom:20px;background:rgba(27,77,62,.92);color:var(--gold);padding:8px 18px;border-radius:999px;font-weight:700;font-size:14px}
.feature-row h3{font-size:27px;margin-bottom:8px}
.feature-row .fr-en{font-size:12.5px;letter-spacing:2.5px;color:var(--ink-3);text-transform:uppercase;margin-bottom:18px}
.feature-row p{color:var(--ink-2);line-height:2;margin-bottom:14px}
.fr-points{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
.fr-points .fp{background:var(--ivory);border-radius:var(--radius-sm);padding:14px 16px;font-size:14px;display:flex;gap:10px;align-items:center}
.fr-points .fp .dot{width:9px;height:9px;background:var(--gold);border-radius:2px;transform:rotate(45deg);flex:none}
@media (max-width:900px){.feature-row,.feature-row.rev{grid-template-columns:1fr;direction:ltr}.fr-points{grid-template-columns:1fr}}

/* 内页头条下的数据带 */
.mini-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);margin-top:-52px;position:relative;z-index:5;border:1px solid var(--line)}
.mini-stats .ms{padding:30px 24px;text-align:center;border-right:1px solid var(--line)}
.mini-stats .ms:last-child{border-right:none}
.mini-stats .mv{font-family:var(--serif);font-size:32px;font-weight:700;color:var(--green)}
.mini-stats .ml{font-size:13.5px;color:var(--ink-2);margin-top:7px}
@media (max-width:760px){.mini-stats{grid-template-columns:1fr 1fr}.mini-stats .ms{border-bottom:1px solid var(--line)}}

/* 新闻详情/案例详情 */
.article-head{max-width:820px;margin:0 auto 30px;text-align:center}
.article-head .ah-meta{display:flex;gap:16px;justify-content:center;color:var(--ink-3);font-size:14px;margin-bottom:18px}
.article-head h1{font-size:34px;line-height:1.4}
.article-body{max-width:820px;margin:0 auto;font-size:16.5px;line-height:2.05;color:var(--ink-2)}
.article-body p{margin-bottom:20px}
.article-body h2{font-size:24px;margin:36px 0 16px;color:var(--ink)}
.article-hero{border-radius:var(--radius);overflow:hidden;margin-bottom:40px;box-shadow:var(--shadow)}
.article-hero img{width:100%;height:420px;object-fit:cover}
.back-link{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-weight:600;margin-bottom:26px}
.back-link:hover{color:var(--gold-deep)}

/* 价值/优势卡片 */
.value-card{text-align:center;padding:36px 26px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.3s}
.value-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.value-card .vc-ic{width:66px;height:66px;border-radius:50%;background:var(--green-tint);color:var(--green);display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.value-card .vc-ic svg{width:32px;height:32px}
.value-card h3{font-size:19px;margin-bottom:10px}
.value-card p{font-size:14px;color:var(--ink-2);line-height:1.8}

/* 章节分隔标题（内页） */
.section-gap{padding:74px 0}
.lead-quote{font-family:var(--serif);font-size:25px;line-height:1.9;color:var(--green-deep);border-left:4px solid var(--gold);padding:6px 0 6px 28px;margin:30px 0}
@media(max-width:760px){.lead-quote{font-size:20px}}

/* 工艺参数表 */
.param-table{width:100%;border-collapse:collapse;margin-top:18px;font-size:14px;background:var(--ivory);border-radius:var(--radius-sm);overflow:hidden}
.param-table td{padding:11px 16px;border-bottom:1px solid var(--line)}
.param-table tr:last-child td{border-bottom:none}
.param-table td:first-child{color:var(--ink-2);width:46%}
.param-table td:last-child{font-weight:700;color:var(--green-deep);font-family:var(--mono)}
.case-detail-block,.news-full{scroll-margin-top:110px}

/* 内页锚点导航 */
.anchor-nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.anchor-nav a{padding:8px 18px;border:1px solid var(--line);border-radius:999px;font-size:14px;color:var(--ink-2);background:var(--ivory);transition:.25s;font-weight:500}
.anchor-nav a:hover{background:var(--green);color:#fff;border-color:var(--green);transform:translateY(-2px)}

/* 论文级数据表 */
.data-table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:640px}
.data-table th{background:var(--green-deep);color:#fff;padding:15px 18px;text-align:left;font-weight:600;letter-spacing:.5px}
.data-table td{padding:14px 18px;border-bottom:1px solid var(--line);color:var(--ink-2)}
.data-table tbody tr:nth-child(even){background:var(--ivory)}
.data-table tbody tr:hover{background:var(--green-tint)}
.data-table td:first-child{font-weight:600;color:var(--ink)}
.data-table td.hl{color:var(--green);font-weight:700;background:rgba(45,147,108,.06)}

/* ============================================================
   移动端加固（修复导航溢出 / Hero 按钮溢出）
   ============================================================ */
@media (max-width:860px){
  .nav .container{gap:12px}
  .nav-logo{flex:0 0 auto}
  .nav-logo img{height:36px}
  .nav-tools{gap:10px;flex:0 0 auto;margin-left:auto}
  .nav-menu{flex:0 0 auto}
  .lang-switch{flex:0 0 auto}
  .lang-switch button{padding:5px 11px;font-size:12px}
  .nav-toggle{flex:0 0 auto;display:flex}
  .hero-inner{width:100%;min-width:0;max-width:100%}
  .h-en{letter-spacing:2px;font-size:11px;line-height:1.7;word-break:break-word}
  .hero-actions{width:100%;gap:12px}
  .hero-actions .btn{flex:1 1 0;min-width:0;padding:13px 10px;font-size:14px;letter-spacing:0;white-space:normal;line-height:1.3;text-align:center}
}
@media (max-width:520px){
  .nav-logo img{height:33px}
  .hero-actions{flex-direction:column;gap:12px}
  .hero-actions .btn{width:100%;flex:none;font-size:14px;padding:13px 8px;white-space:nowrap}
}

/* ===== 嵌入视频（16:9 响应式，视频不存本地） ===== */
.video-frame{position:relative;width:100%;padding-bottom:56.25%;margin:0 0 26px;border-radius:12px;overflow:hidden;background:#0a0a0a;box-shadow:0 12px 32px rgba(11,51,31,.14)}
.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
/* ============================================================
   移动端导航加固：语言切换移入展开菜单，顶部只保留汉堡按钮，
   确保窄屏下汉堡始终在最右可见、绝不横向溢出
   ============================================================ */
.nav-lang-m{display:none}
@media (max-width:860px){
  .nav-tools .lang-switch{display:none}
  .nav-lang-m{display:flex;gap:10px;padding:14px 16px 6px;margin-top:12px;border-top:1px solid var(--line)}
  .nav-lang-m button{flex:1 1 0;padding:13px 0;border:1px solid var(--line);border-radius:10px;font-weight:700;font-size:15px;color:var(--ink-3);background:#fff}
  .nav-lang-m button.on{background:var(--green);color:#fff;border-color:var(--green)}
}
.fb-beian{width:100%;text-align:center;margin-top:2px}