:root{
  --paper:#FFFFFF; --ivory:#F5F3EE; --ink:#1A1A1A; --sub:#666666; --gray:#B5B5B5;
  --green-900:#17301F; --green-700:#2E5238; --green-500:#4A7A55;
  --orange-600:#E8601F; --orange-500:#FF6725; --orange-100:#FDEEE4;
  --line:#E8E8E8;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{background:var(--paper);color:var(--ink);line-height:1.8;
  font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;}
.serif,h1,h2,h3{font-family:"Noto Serif SC","Source Han Serif SC","STSong","SimSun",serif;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px;}
section{padding:84px 0;}

/* ---------- NAV（极简白底细线） ---------- */
header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--line);backdrop-filter:blur(8px);}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px;}
.logo{display:flex;align-items:baseline;gap:10px;}
.logo b{font-family:"Noto Serif SC",serif;font-size:23px;color:var(--ink);letter-spacing:3px;}
.logo span{font-size:11.5px;letter-spacing:4px;color:var(--orange-600);font-weight:600;}
.menu{display:flex;align-items:center;gap:32px;font-size:14.5px;color:var(--ink);}
.menu a{padding:6px 2px;border-bottom:2px solid transparent;transition:.2s;}
.menu a:hover{color:var(--orange-600);}
.menu a.active{color:var(--orange-600);font-weight:600;border-bottom-color:var(--orange-600);}
.menu .cta{background:var(--orange-600);color:#fff;padding:10px 26px;border-radius:2px;
  border-bottom:none;font-size:14px;letter-spacing:2px;}
.menu .cta:hover{background:var(--orange-500);color:#fff;}

/* ---------- 公共 ---------- */
.kicker{color:var(--orange-600);font-size:15px;font-weight:600;letter-spacing:.4em;margin-bottom:12px;}
.en{color:var(--gray);font-size:13px;letter-spacing:.25em;text-transform:uppercase;margin-bottom:26px;}
h2.title{font-size:36px;font-weight:600;color:var(--ink);line-height:1.35;margin-bottom:16px;letter-spacing:1px;}
p.lead{color:var(--sub);font-size:15.5px;max-width:680px;}
.rule{width:48px;height:3px;background:var(--orange-600);margin:24px 0;}
.btn{display:inline-block;padding:14px 38px;font-size:14.5px;letter-spacing:3px;transition:.2s;cursor:pointer;border-radius:2px;}
.btn-primary{background:var(--orange-600);color:#fff;}
.btn-primary:hover{background:var(--orange-500);}
.btn-outline{border:1.5px solid var(--ink);color:var(--ink);background:transparent;}
.btn-outline:hover{background:var(--ink);color:#fff;}
.sec-center{text-align:center;}
.sec-center p.lead{margin:0 auto;}
.sec-center .rule{margin:24px auto 0;}

/* ---------- BANNER 全幅 ---------- */
.banner{position:relative;padding:0;color:#fff;}
.banner svg{display:block;width:100%;height:auto;}
.banner .banner-text{position:absolute;inset:0;display:flex;flex-direction:column;
  justify-content:center;align-items:center;text-align:center;padding:0 24px;}
.banner h1{font-size:54px;font-weight:700;letter-spacing:6px;line-height:1.3;
  text-shadow:0 2px 24px rgba(0,0,0,.45);}
.banner h1 em{font-style:normal;color:#FFB37E;}
.banner .banner-sub{margin:18px 0 30px;font-size:16px;color:rgba(255,255,255,.92);
  letter-spacing:2px;text-shadow:0 1px 12px rgba(0,0,0,.5);max-width:640px;}
.banner .btn-primary{box-shadow:0 8px 28px rgba(232,96,31,.45);}

/* page hero（内页深绿头图带） */
.page-hero{background:var(--green-900);color:#F2EFE6;padding:78px 0 66px;}
.page-hero .kicker{color:#FF9A5E;}
.page-hero h1{font-size:40px;font-weight:600;margin-bottom:14px;letter-spacing:2px;}
.page-hero p{color:#AEB8A2;max-width:640px;font-size:15.5px;}

/* ---------- 数据带 ---------- */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;padding:46px 28px;}
.stats b{display:block;font-family:"Noto Serif SC",serif;font-size:36px;color:var(--ink);}
.stats b i{font-style:normal;color:var(--orange-600);}
.stats span{font-size:13px;color:var(--sub);letter-spacing:1px;}

/* ---------- 四宫格（借鉴 part1） ---------- */
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:44px;}
.tile{position:relative;border-radius:4px;overflow:hidden;aspect-ratio:3/4;color:#fff;
  display:flex;flex-direction:column;justify-content:flex-end;padding:26px 22px;transition:.25s;}
.tile:hover{transform:translateY(-5px);}
.tile .t-num{position:absolute;top:18px;left:20px;font-family:"Noto Serif SC",serif;
  font-size:15px;letter-spacing:2px;color:rgba(255,255,255,.85);}
.tile h3{font-size:20px;letter-spacing:3px;margin-bottom:8px;}
.tile p{font-size:13px;color:rgba(255,255,255,.85);line-height:1.7;}
.tile .t-en{font-size:10.5px;letter-spacing:.3em;color:rgba(255,255,255,.6);margin-top:10px;}
.tile1{background:linear-gradient(160deg,#3E5C41,#17301F);}
.tile2{background:linear-gradient(160deg,#C25A1F,#8C3A10);}
.tile3{background:linear-gradient(160deg,#5E7A55,#2E4526);}
.tile4{background:linear-gradient(160deg,#41403C,#1A1A1A);}

/* ---------- 大图项目卡（借鉴 part2） ---------- */
.bigcard{display:grid;grid-template-columns:1.15fr .85fr;gap:0;border:1px solid var(--line);
  border-radius:4px;overflow:hidden;margin-top:34px;background:#fff;}
.bigcard.rev{grid-template-columns:.85fr 1.15fr;}
.bigcard .bc-img{min-height:320px;position:relative;}
.bigcard .bc-img svg{position:absolute;inset:0;width:100%;height:100%;}
.bigcard .bc-body{padding:52px 48px;display:flex;flex-direction:column;justify-content:center;}
.bigcard .bc-body .kicker{margin-bottom:8px;}
.bigcard .bc-body h3{font-size:26px;letter-spacing:2px;color:var(--ink);margin-bottom:14px;}
.bigcard .bc-body p{font-size:14.5px;color:var(--sub);}
.bigcard .bc-body .more{margin-top:22px;font-size:13.5px;color:var(--orange-600);letter-spacing:2px;}

/* ---------- 四宫格可点击化（四大赋能系统 v1） ---------- */
a.tile{text-decoration:none;}
.tile .t-role{position:absolute;top:18px;right:18px;font-size:10.5px;letter-spacing:2px;
  border:1px solid rgba(255,255,255,.45);border-radius:99px;padding:3px 10px;color:rgba(255,255,255,.85);}
.tile .t-more{font-size:11.5px;letter-spacing:2px;color:rgba(255,255,255,.75);margin-top:12px;transition:.2s;}
.tile:hover .t-more{color:#FF9A5E;}

/* ---------- 产品三卡（深绿） ---------- */
.dark{background:var(--green-900);color:#F2EFE6;}
.dark .kicker{color:#FF9A5E;}
.dark h2.title{color:#F8F5EA;}
.dark p.lead{color:#AEB8A2;}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px;}
.pcard{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);
  border-radius:4px;padding:38px 32px;transition:.25s;}
.pcard:hover{border-color:var(--orange-500);}
.pcard .price{font-family:"Noto Serif SC",serif;font-size:38px;color:#FF9A5E;}
.pcard .price small{font-size:14px;color:#AEB8A2;}
.pcard h3{font-size:20px;margin:12px 0 10px;color:#F8F5EA;letter-spacing:2px;}
.pcard p{font-size:14px;color:#C4C2B2;}
.pcard .more{display:inline-block;margin-top:18px;color:#FF9A5E;font-size:13.5px;letter-spacing:2px;}

/* ---------- 旧组件（内页沿用） ---------- */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;}
.card{background:#fff;border:1px solid var(--line);border-radius:4px;padding:34px 28px;transition:.25s;}
.card:hover{box-shadow:0 16px 36px rgba(0,0,0,.08);}
.card .ico{width:52px;height:52px;border-radius:4px;background:var(--orange-100);
  color:var(--orange-600);display:flex;align-items:center;justify-content:center;margin-bottom:18px;}
.card .ico svg{width:26px;height:26px;stroke:currentColor;fill:none;stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round;}
.card h3{font-size:19px;color:var(--ink);margin-bottom:8px;}
.card p{font-size:14px;color:var(--sub);}
.card .tag{display:inline-block;margin-top:16px;font-size:12px;color:var(--orange-600);
  border:1px solid #F3C9AC;border-radius:999px;padding:3px 12px;letter-spacing:2px;}
.prow{display:grid;grid-template-columns:280px 1fr;background:#fff;border:1px solid var(--line);
  border-radius:4px;overflow:hidden;margin-top:26px;}
.prow .price{background:var(--orange-600);display:flex;flex-direction:column;justify-content:center;
  align-items:center;padding:36px 20px;color:#fff;}
.prow .price .num{font-family:"Noto Serif SC",serif;font-size:40px;font-weight:700;}
.prow .price .num small{font-size:14px;font-weight:400;opacity:.85;}
.prow .price .name{margin-top:6px;font-size:15px;letter-spacing:3px;}
.prow .body{padding:32px 36px;}
.prow .body h3{font-size:20px;color:var(--ink);margin-bottom:10px;}
.prow .body p{font-size:14.5px;color:var(--sub);}
.prow .body ul{margin:14px 0 0;padding-left:18px;color:var(--sub);font-size:14px;}
.prow .body li{margin-bottom:4px;}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:40px;}
.ph{aspect-ratio:4/3;border-radius:4px;display:flex;align-items:flex-end;padding:16px;
  color:#F2EFE2;font-size:13px;letter-spacing:1px;position:relative;overflow:hidden;}
.ph::after{content:"实景图 · 待替换";position:absolute;top:12px;right:14px;font-size:11px;
  color:rgba(255,255,255,.75);}
.ph1{background:linear-gradient(150deg,#4A7A55,#17301F);}
.ph2{background:linear-gradient(150deg,#E88538,#B4531F);}
.ph3{background:linear-gradient(150deg,#7A8C64,#41552F);}
.ph4{background:linear-gradient(150deg,#B4713B,#6E3D1C);}
.ph5{background:linear-gradient(150deg,#5E7F6B,#243B2C);}
.ph6{background:linear-gradient(150deg,#D9A05B,#8C5A24);}
.faq-list{margin-top:40px;display:grid;gap:14px;max-width:820px;}
.faq{display:flex;justify-content:space-between;align-items:center;background:#fff;
  border:1px solid var(--line);border-radius:4px;padding:22px 26px;transition:.2s;}
.faq:hover{border-color:var(--orange-600);}
.faq .q{font-size:16px;color:var(--ink);}
.faq .q::before{content:"Q";font-family:"Noto Serif SC",serif;color:var(--orange-600);
  font-weight:700;margin-right:12px;}
.faq .meta{font-size:12.5px;color:var(--sub);white-space:nowrap;padding-left:16px;}
.timeline{margin-top:44px;border-left:2px solid var(--line);padding-left:36px;display:grid;gap:30px;}
.tl-item{position:relative;}
.tl-item::before{content:"";position:absolute;left:-43px;top:8px;width:12px;height:12px;
  border-radius:50%;background:var(--orange-600);border:3px solid #fff;}
.tl-item h3{font-size:18px;color:var(--ink);margin-bottom:4px;}
.tl-item p{font-size:14.5px;color:var(--sub);max-width:560px;}
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:44px 0;}
.ccard{background:#fff;border:1px solid var(--line);border-radius:4px;padding:30px;}
.ccard b{display:block;font-family:"Noto Serif SC",serif;font-size:17px;color:var(--ink);margin-bottom:8px;}
.ccard p{font-size:14.5px;color:var(--sub);}
.form{background:#fff;border:1px solid var(--line);border-radius:4px;padding:40px;max-width:640px;}
.form label{display:block;font-size:13.5px;color:var(--sub);margin:18px 0 6px;}
.form input,.form textarea,.form select{width:100%;padding:13px 16px;border:1px solid var(--line);
  border-radius:2px;font-size:15px;background:var(--ivory);font-family:inherit;color:var(--ink);}
.form input:focus,.form textarea:focus{outline:2px solid var(--orange-500);border-color:transparent;}
.cta-band{background:var(--ivory);border-top:1px solid var(--line);}
.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;}
.cta-inner h2{font-size:26px;color:var(--ink);}
.cta-inner p{color:var(--sub);font-size:14.5px;}
footer{background:var(--green-900);color:#9FAA92;font-size:13.5px;padding:46px 0;}
footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;}
footer b{color:#E8E3D2;font-family:"Noto Serif SC",serif;letter-spacing:3px;}
footer a{color:#C8CDBB;}
footer a:hover{color:#FF9A5E;}

@media (max-width:900px){
  .hero-inner,.grid2{grid-template-columns:1fr;}
  .grid4{grid-template-columns:repeat(2,1fr);}
  .grid3,.contact-cards{grid-template-columns:1fr;}
  .bigcard,.bigcard.rev{grid-template-columns:1fr;}
  .prow{grid-template-columns:1fr;}
  .stats .wrap{grid-template-columns:repeat(2,1fr);}
  .banner h1{font-size:36px;letter-spacing:3px;}
  .menu{display:none;}
  section{padding:60px 0;}
  .page-hero h1{font-size:32px;}
  .bigcard .bc-body{padding:34px 26px;}
}

/* ---------- 后台填充的图集与全站字号 ---------- */
.ph.filled::after{display:none;}
.ph .ph-label{position:relative;z-index:1;text-shadow:0 1px 8px rgba(0,0,0,.6);}
html.fs-lg{zoom:1.08;}
html.fs-sm{zoom:0.94;}

/* ===== 全站统一：黑色加宽导航条（北辰式） ===== */
.topbar { position:sticky; top:0; z-index:100; background:#161616; }
.topbar .tb-in { display:flex; align-items:center; justify-content:space-between; gap:20px; padding:0 4vw; height:84px; }
.topbar .tb-logo img { height:52px; width:auto; display:block; }
.topbar .tb-menu { display:flex; align-items:center; gap:38px; flex-wrap:wrap; }
.topbar .tb-menu a { color:#fff; text-decoration:none; font-size:15px; letter-spacing:2px; padding:8px 2px; border-bottom:2px solid transparent; transition:.2s; white-space:nowrap; }
.topbar .tb-menu a:hover { color:#FF6725; }
.topbar .tb-menu a.active { border-bottom-color:#fff; font-weight:600; }
/* —— 2.0 顶部导航下拉 —— */
.topbar .tb-item { position:relative; }
.topbar .tb-item > a { display:inline-block; }
.topbar .tb-drop { position:absolute; top:100%; left:50%; transform:translateX(-50%); background:#161616; min-width:150px; padding:8px 0; display:none; flex-direction:column; box-shadow:0 8px 24px rgba(0,0,0,.3); border-radius:0 0 8px 8px; z-index:300; }
.topbar .tb-item:hover .tb-drop { display:flex; }
.topbar .tb-drop a { display:block; padding:9px 18px; font-size:14px; letter-spacing:1px; border-bottom:none; white-space:nowrap; }
.topbar .tb-drop a:hover { background:rgba(255,255,255,.08); color:#FF6725; }
@media (max-width: 1080px) {
  .topbar .tb-in { height:auto; padding:12px 4vw; flex-wrap:wrap; }
  .topbar .tb-logo img { height:44px; }
  .topbar .tb-menu { gap:20px; }
  .topbar .tb-menu a { font-size:13.5px; }
}

/* ===== 导航下拉菜单（北辰式黑色下拉） ===== */
.tb-item { position:relative; }
.tb-item > a { display:inline-block; }
.tb-item .tb-drop { position:absolute; top:100%; left:50%; transform:translateX(-50%); min-width:158px;
  background:#161616; border-top:2px solid #FF6725; padding:6px 0; display:none; z-index:120;
  box-shadow:0 14px 34px rgba(0,0,0,.28); }
.tb-item:hover .tb-drop, .tb-item:focus-within .tb-drop { display:block; }
.tb-item .tb-drop a { display:block; text-align:center; padding:13px 22px; font-size:14.5px; letter-spacing:2px;
  color:#fff; border-bottom:none; white-space:nowrap; }
.tb-item .tb-drop a:hover { background:#242424; color:#FF6725; }
.tb-item .tb-drop a.on { color:#FF6725; }

/* ===== 新闻中心页（北辰式：左分类 + 右列表） ===== */
.news-hero { position:relative; min-height:52vh; display:flex; align-items:center; overflow:hidden; background:#111; }
.news-hero .bg { position:absolute; inset:0; background:url('article/news-hero.jpg') center/cover no-repeat; }
.news-hero .mask { position:absolute; inset:0; background:linear-gradient(180deg, rgba(8,10,9,.70), rgba(8,10,9,.50) 45%, rgba(8,10,9,.75)); }
.news-hero .inner { position:relative; z-index:2; padding:90px 6vw; }
.news-hero h1 { font-family:"Noto Serif SC",serif; font-size:clamp(40px,5.6vw,76px); font-weight:900; color:#fff; letter-spacing:8px; line-height:1.2; text-shadow:0 4px 30px rgba(0,0,0,.5); }
.news-hero .en { font-size:clamp(16px,2vw,26px); letter-spacing:.35em; color:rgba(255,255,255,.85); margin-top:10px; text-transform:uppercase; }
.news-layout { display:grid; grid-template-columns:240px 1fr; gap:44px; align-items:start; padding:70px 0 90px; }
.news-cats { border-top:3px solid var(--ink); }
.news-cats .hd { display:flex; align-items:center; gap:10px; padding:20px 4px 16px; }
.news-cats .hd i { display:block; width:5px; height:20px; background:var(--orange-600); }
.news-cats .hd b { font-size:17px; letter-spacing:3px; color:var(--ink); }
.news-cats a.cat { display:flex; justify-content:space-between; align-items:center; padding:15px 6px; font-size:14.5px;
  color:var(--sub); text-decoration:none; letter-spacing:2px; border-bottom:1px solid var(--line); transition:.2s; }
.news-cats a.cat span.arr { color:#C9C5B8; font-size:13px; transition:.2s; }
.news-cats a.cat:hover { color:var(--orange-600); padding-left:12px; }
.news-cats a.cat.on { color:var(--orange-600); font-weight:600; }
.news-cats a.cat.on span.arr { color:var(--orange-600); }
.news-list { display:flex; flex-direction:column; }
.news-item { display:grid; grid-template-columns:210px 1fr; gap:26px; padding:28px 4px; border-bottom:1px solid var(--line);
  text-decoration:none; transition:.2s; }
.news-item:first-child { padding-top:6px; }
.news-item:hover { background:#FAF8F1; }
.news-item .thumb { width:210px; height:132px; overflow:hidden; background:#EEE9DC; }
.news-item .thumb img { width:100%; height:100%; object-fit:cover; display:block; transition:.3s; }
.news-item:hover .thumb img { transform:scale(1.05); }
.news-item .thumb.ph { display:flex; align-items:center; justify-content:center; font-size:12px; letter-spacing:3px; color:#B4AF9F; }
.news-item h3 { font-size:18.5px; font-weight:600; color:var(--ink); letter-spacing:1px; line-height:1.5; }
.news-item:hover h3 { color:var(--orange-600); }
.news-item p { margin-top:10px; font-size:13.5px; color:var(--sub); line-height:1.8; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.news-item .meta { margin-top:12px; font-size:12.5px; color:var(--gray); letter-spacing:1px; display:flex; gap:18px; align-items:center; }
.news-item .meta .cat-tag { color:var(--orange-600); border:1px solid #F3C9AC; border-radius:999px; padding:2px 12px; font-size:12px; }
.news-empty { padding:60px 10px; text-align:center; color:var(--gray); font-size:14px; letter-spacing:2px; display:none; }
@media (max-width: 900px) {
  .news-layout { grid-template-columns:1fr; gap:26px; padding:44px 0 60px; }
  .news-cats { border-top:none; }
  .news-item { grid-template-columns:1fr; gap:14px; }
  .news-item .thumb { width:100%; height:170px; }
}