/* ============================================================
   瑞地勘测官网 · v4 视觉系统（工业图纸 × 杂志编辑）
   ------------------------------------------------------------
   加载顺序：内页 style.css → v4.css（覆盖层）
             首页 仅 v4.css
   令牌说明：沿用 style.css 的变量名，便于内页整体换肤
============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --canvas:#F4F1E8;          /* 图纸米白 · 页面底 */
  --paper:#FBF8F0;           /* 暖白 · 卡片与面板 */
  --paper-dim:#EAE5D7;       /* 米白加深 · 分区底 */
  --ink:#0A2620;             /* 近黑深绿 */
  --ink-deep:#07201B;
  --ink-2:#10362E;
  --accent:#BA7517;          /* 仪器琥珀 · 唯一强调色 */
  --amber:#BA7517;
  --amber-bright:#D89B3D;
  --green:#2E8B72;           /* 品牌绿 · 仅小面积状态色 */
  --text:#1E2B27;
  --tx:#1E2B27;
  --tx-2:#5C6660;
  --tx-3:#8B948E;
  --muted:#5C6660;
  --faint:#8B948E;
  --line:rgba(10,38,32,.16);
  --line-strong:rgba(10,38,32,.55);
  --line-inv:rgba(244,241,232,.16);
  --sans:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono","SF Mono",ui-monospace,Consolas,monospace;
  --max:1280px;
  --pad:clamp(20px,4vw,48px);
  --ease:cubic-bezier(.16,1,.3,1);
}

/* ---------- 2. 基础 ---------- */
body{
  background:var(--canvas);color:var(--tx);
  font-family:var(--sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;letter-spacing:0;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px}

/* 图纸颗粒底纹（全站氛围层） */
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24'%3E%3Cpath d='M24 0H0v24' fill='none' stroke='%230A2620' stroke-opacity='0.5' stroke-width='0.5'/%3E%3C/svg%3E");
}
main{position:relative;z-index:1}

/* ---------- 3. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(244,241,232,.94);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);color:var(--tx);
  transition:none;
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:24px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-logo{height:36px;width:auto;display:block}
.brand-logo.wh{display:none}
.brand-logo.bl{display:block}
.brand .b-txt{display:flex;flex-direction:column;line-height:1.25}
.brand .b-cn{font-size:15px;font-weight:700;letter-spacing:.16em}
.brand .b-en{font-family:var(--mono);font-size:9px;letter-spacing:.22em;color:var(--tx-3)}

.nav{display:flex;align-items:center;gap:26px}
.nav a{font-size:13.5px;letter-spacing:.08em;color:var(--tx-2);position:relative;padding:6px 0;transition:color .18s ease}
.nav a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--amber);transition:width .28s var(--ease)}
.nav a:hover,.nav a.active{color:var(--tx)}
.nav a:hover::after,.nav a.active::after{width:100%}

.header-actions{display:flex;align-items:center;gap:14px;flex:none}
.platform-btn{
  display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 14px;
  border:1px solid var(--line-strong);font-size:12.5px;letter-spacing:.06em;color:var(--tx);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.platform-btn svg{width:10px;height:10px;flex:none}
.platform-btn:hover{border-color:var(--amber);color:var(--amber);background:rgba(186,117,23,.07)}
.header-tel{font-family:var(--mono);font-size:12.5px;letter-spacing:.04em;color:var(--tx-2);display:flex;align-items:baseline;gap:8px}
.header-tel em{font-style:normal;font-size:9px;letter-spacing:.2em;color:var(--tx-3)}
.menu-btn{display:none;width:38px;height:38px;border:1px solid var(--line-strong);background:transparent;cursor:pointer;position:relative}
.menu-btn span{position:absolute;left:10px;width:16px;height:1px;background:var(--tx);transition:transform .25s ease,opacity .2s ease}
.menu-btn span:nth-child(1){top:14px}
.menu-btn span:nth-child(2){top:19px}
.menu-btn span:nth-child(3){top:24px}

/* ---------- 4. HERO（首页 · 非对称） ---------- */
.hero{position:relative;overflow:hidden;background:var(--canvas);margin-top:0;padding:0;min-height:0;display:block;color:var(--tx)}
.hero-grid{display:grid;grid-template-columns:46fr 54fr;min-height:min(72vh,620px)}
.hero-copy{padding:clamp(46px,7vh,80px) clamp(24px,2.4vw,40px) clamp(38px,6vh,68px) clamp(48px,7.2vw,132px);display:flex;flex-direction:column;justify-content:center;position:relative}
.eyebrow,.hero-eyebrow{
  display:flex;align-items:center;gap:12px;font-family:var(--mono);
  font-size:11px;letter-spacing:.22em;color:var(--tx-2);margin-bottom:28px;
}
.eyebrow::before,.hero-eyebrow::before{content:"";width:34px;height:2px;background:var(--amber);flex:none}
h1.hero-title{
  font-size:clamp(38px,4.6vw,64px);font-weight:900;line-height:1.12;
  letter-spacing:-.015em;color:var(--ink);margin:0;
}
h1.hero-title .mark{position:relative;z-index:0;white-space:nowrap}
h1.hero-title .mark::after{content:"";position:absolute;left:-2%;bottom:.06em;height:.13em;width:104%;background:var(--amber);opacity:.85;z-index:-1}
.hero-sub,.hero-desc{margin:24px 0 0;font-size:15.5px;line-height:2;color:var(--tx-2);max-width:480px}
.hero-sub b,.hero-desc b{color:var(--ink);font-weight:600}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero-foot{margin-top:auto;padding-top:34px;display:flex;gap:26px;flex-wrap:wrap;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--tx-3)}
.hero-foot b{color:var(--amber);font-weight:400}

.btn{
  display:inline-flex;align-items:center;gap:10px;height:50px;padding:0 28px;
  font-size:14px;letter-spacing:.1em;font-weight:600;border:1px solid transparent;
  transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:active{transform:scale(.98)}
.btn svg{width:14px;height:14px;flex:none}
.btn-amber,.btn-solid{background:var(--amber);color:#FBF8F0;border-color:var(--amber)}
.btn-amber:hover,.btn-solid:hover{background:var(--amber-bright);border-color:var(--amber-bright);transform:translateY(-1px)}
.btn-line,.btn-ghost,.btn-onlight{border:1px solid var(--line-strong);color:var(--ink);background:transparent}
.btn-line:hover,.btn-ghost:hover,.btn-onlight:hover{border-color:var(--ink);background:var(--ink);color:var(--canvas);transform:translateY(-1px)}

/* 右半幅：真影像 + DLG 揭示 + 图签 */
.hero-visual{position:relative;overflow:hidden;background:var(--ink);min-height:420px}
.hero-visual .ph{position:absolute;inset:0}
.hero-visual .ph img{width:100%;height:100%;object-fit:cover;object-position:center 40%}
.hero-visual .ph video{width:100%;height:100%;object-fit:cover;object-position:center 40%;display:block}
.hero-visual .veil{position:absolute;inset:0;background:linear-gradient(200deg,rgba(10,38,32,.34),transparent 48%)}
.crop{position:absolute;width:22px;height:22px;border:0 solid rgba(244,241,232,.8);pointer-events:none}
.crop.tl{top:16px;left:16px;border-top-width:1px;border-left-width:1px}
.crop.tr{top:16px;right:16px;border-top-width:1px;border-right-width:1px}
.crop.bl{bottom:16px;left:16px;border-bottom-width:1px;border-left-width:1px}
.crop.br{bottom:16px;right:16px;border-bottom-width:1px;border-right-width:1px}
.geo-tag{
  position:absolute;top:20px;right:48px;font-family:var(--mono);font-size:10px;
  letter-spacing:.2em;color:rgba(244,241,232,.75);writing-mode:vertical-rl;
  padding-top:8px;border-top:1px solid rgba(244,241,232,.5);
}
.flight-meta{
  position:absolute;top:20px;right:22px;font-family:var(--mono);font-size:8.5px;
  letter-spacing:.18em;color:rgba(244,241,232,.42);writing-mode:vertical-rl;
  padding-top:8px;border-top:1px solid rgba(244,241,232,.22);
}
@media(max-width:720px){.flight-meta{display:none}}

/* ---------- 5. 刻度标尺带 ---------- */
.ruler{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--canvas)}
.ruler .wrap{display:flex;align-items:center;height:44px;overflow:hidden}
.ruler .ticks{display:flex;flex:1}
.ruler .tick{flex:1;height:7px;border-left:1px solid var(--line-strong);border-bottom:1px solid var(--line-strong);margin-bottom:-1px}
.ruler .tick:nth-child(5n+1){height:12px}
.ruler-txt{display:flex;justify-content:space-between;font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;color:var(--tx-3);padding:6px 0 0}

/* ---------- 6. 资质带 ---------- */
.cred-bar{background:var(--paper-dim);border-bottom:1px solid var(--line);color:var(--tx)}
.cred-bar .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.cred{padding:26px 24px 24px;border-left:1px solid var(--line);display:flex;flex-direction:column;gap:2px}
.cred:first-child{border-left:0;padding-left:0}
.cred:last-child{padding-right:0}
.cred-k{font-family:var(--mono);font-size:9px;letter-spacing:.22em;color:var(--amber);text-transform:uppercase}
.cred-v{font-size:15px;font-weight:700;color:var(--ink);margin-top:6px;letter-spacing:.04em;line-height:1.5}
.cred-s{font-family:var(--mono);font-size:11px;color:var(--tx-3);margin-top:2px;letter-spacing:.06em}

/* ---------- 7. 区块骨架 ---------- */
.section{padding:clamp(64px,8.5vh,112px) 0}
.section.tight{padding:clamp(52px,7vh,88px) 0}
.section-head{margin-bottom:0}
.section-head.split{display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:end}
.sec-head{display:grid;grid-template-columns:auto 1fr auto;gap:32px;align-items:end;margin-bottom:52px}
.sec-no,.sec-index{
  font-family:var(--mono);font-size:12px;letter-spacing:.22em;color:var(--amber);
  display:flex;align-items:center;gap:12px;padding-bottom:10px;margin-bottom:0;
}
.sec-no::after,.sec-index::after{content:"";width:44px;height:1px;background:var(--line-strong)}
h2.sec-title,.sec-head h2{
  font-size:clamp(26px,3vw,42px);font-weight:900;line-height:1.24;
  letter-spacing:-.01em;color:var(--ink);text-wrap:balance;
}
h2.sec-title small,.sec-head h2 small{
  display:block;font-size:13.5px;font-weight:400;color:var(--tx-2);
  letter-spacing:.06em;margin-top:10px;line-height:1.9;
}
.sec-note,.sec-side{font-size:13px;color:var(--tx-2);line-height:1.95;max-width:340px;justify-self:end;padding-bottom:6px}

/* ---------- 8. 业务：编辑式大编号行 ---------- */
.biz-list{border-top:1px solid var(--line-strong)}
.biz-row{
  display:grid;grid-template-columns:80px 300px 1fr auto;gap:28px;align-items:baseline;
  padding:28px 10px;border-bottom:1px solid var(--line);position:relative;
  transition:background .22s ease,color .22s ease;
}
.biz-row::before{content:"";position:absolute;left:0;top:0;bottom:0;width:0;background:var(--amber);transition:width .3s var(--ease)}
.biz-row:hover{background:var(--ink);color:var(--canvas)}
.biz-row:hover::before{width:4px}
.biz-num{font-family:var(--mono);font-size:13px;letter-spacing:.14em;color:var(--tx-3);transition:color .22s ease;margin-bottom:0}
.biz-row:hover .biz-num{color:var(--amber-bright)}
.biz-row h3{font-size:21px;font-weight:800;letter-spacing:.02em;color:var(--ink);transition:color .22s ease;margin:0}
.biz-row:hover h3{color:var(--canvas)}
.biz-en{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:var(--tx-3);margin-top:4px;transition:color .22s ease}
.biz-row:hover .biz-en{color:rgba(244,241,232,.5)}
.biz-row p,.biz-desc{font-size:13.5px;line-height:1.9;color:var(--tx-2);max-width:560px;margin:0;transition:color .22s ease;flex:none}
.biz-row:hover p,.biz-row:hover .biz-desc{color:rgba(244,241,232,.74)}
.biz-tags{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.tag{font-size:11px;letter-spacing:.06em;padding:3px 10px;line-height:1.6;border:1px solid var(--line);color:var(--tx-2);background:transparent;transition:border-color .22s ease,color .22s ease}
.biz-row:hover .tag{border-color:var(--line-inv);color:rgba(244,241,232,.72)}

/* ---------- 9. 深绿带（设备） ---------- */
.dark-band{background:var(--ink);color:var(--canvas);position:relative;overflow:hidden}
.dark-band::before{
  content:"";position:absolute;inset:0;opacity:.13;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='560' height='420' viewBox='0 0 560 420'%3E%3Cg fill='none' stroke='%235FBF9F' stroke-width='1'%3E%3Cpath d='M-20 380C120 340 180 250 320 260S520 180 600 150'/%3E%3Cpath d='M-20 330C110 295 190 210 330 218S540 140 600 105'/%3E%3Cpath d='M-20 280C105 250 200 170 340 175S555 100 600 60'/%3E%3Cpath d='M-20 230C100 205 210 130 350 132S570 60 600 15'/%3E%3C/g%3E%3C/svg%3E");
}
.dark-band .wrap{position:relative;z-index:1}
.dark-band .sec-no{color:var(--amber-bright)}
.dark-band h2.sec-title,.dark-band .sec-head h2{color:var(--canvas)}
.dark-band h2.sec-title small,.dark-band .sec-head h2 small{color:rgba(244,241,232,.62)}
.dark-band .sec-note,.dark-band .sec-side{color:rgba(244,241,232,.62)}
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line-inv);border-bottom:1px solid var(--line-inv);margin-top:8px}
.dark-band .stat-cell,.dark-band .equip-cell{padding:34px 26px 30px;border-left:1px solid var(--line-inv);position:relative}
.dark-band .stat-cell:first-child,.dark-band .equip-cell:first-child{border-left:0;padding-left:0}
.dark-band .stat-cell:last-child,.dark-band .equip-cell:last-child{padding-right:0}
.dark-band .stat-cell .k,.dark-band .equip-k{font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;color:var(--amber-bright);display:block;margin-bottom:14px}
.dark-band .stat-cell .n,.dark-band .equip-num{font-family:var(--mono);font-size:clamp(32px,3.2vw,50px);font-weight:400;line-height:1;letter-spacing:-.02em;color:var(--canvas);display:flex;align-items:baseline;gap:6px}
.dark-band .stat-cell .n em,.dark-band .equip-unit{font-style:normal;font-size:13px;color:var(--amber-bright);margin-left:2px;letter-spacing:.08em}
.dark-band .stat-cell .l,.dark-band .equip-name{font-size:13px;color:rgba(244,241,232,.7);margin-top:12px;letter-spacing:.05em;line-height:1.7}
.dark-band .stat-cell .s,.dark-band .equip-note{font-family:var(--mono);font-size:9.5px;color:rgba(244,241,232,.36);margin-top:5px;letter-spacing:.12em}
.equip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);margin-top:8px}
.dark-band .equip-grid{gap:0;background:transparent;border-top:1px solid var(--line-inv);border-bottom:1px solid var(--line-inv)}
.equip-n{display:flex;align-items:baseline;gap:6px;margin:0}

/* ---------- 10. 浅色 KPI 条（统计） ---------- */
.kpi-strip{background:var(--paper-dim);border-bottom:1px solid var(--line)}
.kpi-strip .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.kpi{padding:30px 24px 28px;border-left:1px solid var(--line)}
.kpi:first-child{border-left:0;padding-left:0}
.kpi:last-child{padding-right:0}
.kpi .n,.stat-n{font-family:var(--mono);font-size:clamp(28px,2.8vw,42px);font-weight:400;line-height:1;letter-spacing:-.02em;color:var(--ink);display:flex;align-items:baseline;gap:6px}
.kpi .n em,.stat-n em{font-style:normal;font-size:13px;color:var(--amber);letter-spacing:.06em}
.kpi .l,.stat-l{font-size:13px;color:var(--tx-2);margin-top:12px;letter-spacing:.05em}
.kpi .s,.stat-s{font-family:var(--mono);font-size:9.5px;color:var(--tx-3);margin-top:4px;letter-spacing:.12em}
.stats{background:var(--paper-dim);color:var(--tx)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{padding:30px 24px 28px;border-left:1px solid var(--line)}

/* ---------- 11. 场景卡（真影像 + 揭示） ---------- */
.sc-grid{display:grid;grid-template-columns:7fr 5fr;grid-template-rows:auto auto;gap:18px}
.scene-card{position:relative;overflow:hidden;background:var(--ink);min-height:300px;display:flex;align-items:flex-end;border:1px solid var(--line)}
.scene-card.big{grid-row:span 2;min-height:600px}
.scene-card .ph{position:absolute;inset:0}
.scene-card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease);filter:saturate(.92)}
.scene-card:hover .ph img{transform:scale(1.045)}
.scene-card .veil{position:absolute;inset:0;background:linear-gradient(to top,rgba(6,24,19,.88) 0%,rgba(6,24,19,.2) 46%,transparent 70%)}
.scene-card .scene-body{position:relative;z-index:1;padding:26px 28px;color:var(--canvas);width:100%}
.scene-card .scene-body .idx{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--amber-bright);display:block;margin-bottom:10px}
.scene-card .scene-body h3{font-size:19px;font-weight:700;letter-spacing:.03em;line-height:1.5;color:var(--canvas);margin:0}
.scene-card .scene-body dl{display:grid;grid-template-columns:64px 1fr;gap:3px 12px;font-size:12.5px;line-height:1.9;margin-top:12px;color:rgba(244,241,232,.78)}
.scene-card .scene-body dt{color:rgba(244,241,232,.45);letter-spacing:.06em}
.scene-card .scene-body dd{margin:0}
.scene-card:hover .scene-body dl{max-height:220px;opacity:1}
.scene-card .scene-body dl{max-height:0;overflow:hidden;transition:max-height .5s var(--ease)}
.scene-card.open .scene-body dl{max-height:220px}
.scene-corner{
  position:absolute;top:14px;right:14px;font-family:var(--mono);font-size:9px;letter-spacing:.16em;
  color:rgba(244,241,232,.88);background:rgba(10,38,32,.72);border:1px solid var(--line-inv);padding:4px 10px;z-index:1;
}
.scene-more{
  display:flex;flex-direction:column;justify-content:space-between;padding:26px 28px;
  border:1px solid var(--line);background:var(--paper);min-height:220px;
}
.scene-more .idx{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--amber);margin-bottom:12px}
.scene-more h3{font-size:18px;font-weight:800;color:var(--ink);letter-spacing:.03em;line-height:1.5}
.scene-more p{font-size:12.5px;color:var(--tx-2);line-height:1.9;margin-top:10px}
.scene-more a{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;color:var(--amber);margin-top:18px;display:inline-block}
.scene-more a:hover{color:var(--ink)}
.scene-foot{margin-top:40px;display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:24px;border-top:1px solid var(--line);flex-wrap:wrap}
.scene-foot p{font-size:12.5px;color:var(--tx-3);max-width:680px;line-height:1.9}
@media (hover:none){
  .scene-body dl{max-height:220px}
}

/* ---------- 12. 流程（六环节） ---------- */
.flow{display:grid;grid-template-columns:repeat(6,1fr);gap:0;position:relative;border-top:1px solid var(--line-strong);padding-top:0}
.step{position:relative;padding:24px 18px 0 0;border-left:1px solid var(--line);padding-left:18px}
.step:first-child{border-left:0;padding-left:0}
.step-dot{
  position:absolute;top:-5px;left:0;width:9px;height:9px;border-radius:50%;
  background:var(--canvas);border:1px solid var(--line-strong);transition:background .2s ease,border-color .2s ease;
}
.step:first-child .step-dot{left:0}
.step:hover .step-dot{background:var(--amber);border-color:var(--amber)}
.step-num{font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--amber);margin-bottom:10px}
.step h4{font-size:14.5px;font-weight:700;letter-spacing:.04em;color:var(--ink);margin-bottom:8px}
.step p{font-size:12.5px;line-height:1.8;color:var(--tx-2);padding-right:6px}

/* ---------- 13. 中标记录（编辑列表） ---------- */
.deals{border-top:1px solid var(--line-strong);display:grid;grid-template-columns:1fr 1fr;gap:0 56px}
.deal{
  display:grid;grid-template-columns:104px 1fr;gap:18px;align-items:baseline;
  padding:18px 6px;border-bottom:1px solid var(--line);transition:background .2s ease;
}
.deal:hover{background:rgba(10,38,32,.04)}
.deal .d{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--tx-3);line-height:1.9}
.deal .d b{display:block;color:var(--amber);font-weight:400;font-size:12.5px}
.deal h4{font-size:14.5px;font-weight:600;line-height:1.65;color:var(--ink);margin:0;letter-spacing:.01em}
.deal:hover h4{color:var(--amber)}
.deal .m{font-size:12px;color:var(--tx-3);margin-top:4px;display:flex;gap:14px;flex-wrap:wrap}
.deal .m span{line-height:1.7}

/* ---------- 14. 新闻与公示 ---------- */
.dual-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,72px);align-items:start}
.col-head{display:flex;justify-content:space-between;align-items:baseline;padding-bottom:14px;border-bottom:2px solid var(--ink);margin-bottom:2px}
.col-head h3{font-size:18px;font-weight:800;letter-spacing:.08em;color:var(--ink);margin:0}
.col-head a{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--amber)}
.col-head a:hover{color:var(--ink)}
.item{display:grid;grid-template-columns:96px 1fr;gap:18px;padding:18px 4px;border-bottom:1px solid var(--line);transition:background .2s ease}
.item:hover{background:rgba(10,38,32,.04)}
.item-date{display:block;font-family:var(--mono);font-size:11px;color:var(--tx-3);letter-spacing:.06em;line-height:1.9}
.item-date b,.item-date>span:first-child{display:block;color:var(--amber);font-weight:400;font-size:12.5px;margin-bottom:3px}
.item h4{font-size:15px;font-weight:600;line-height:1.7;color:var(--ink);margin:0;letter-spacing:.01em}
.item:hover h4{color:var(--amber)}
.item p{font-size:12.5px;color:var(--tx-2);margin-top:4px;line-height:1.85}
.badge{font-size:10px;padding:1px 8px;border:1px solid var(--line);color:var(--tx-3);letter-spacing:.08em;background:transparent;flex:none}
.badge.on{color:var(--amber);border-color:rgba(186,117,23,.5);background:rgba(186,117,23,.07)}
.pub-note{font-size:12px;color:var(--tx-3);line-height:1.95;margin-top:18px;padding-top:14px;border-top:1px dashed var(--line)}

/* ---------- 15. CTA ---------- */
.cta{background:var(--ink-2);color:var(--canvas);padding:60px 0;position:relative;overflow:hidden}
.cta::before{
  content:"";position:absolute;inset:0;opacity:.12;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='560' height='420' viewBox='0 0 560 420'%3E%3Cg fill='none' stroke='%235FBF9F' stroke-width='1'%3E%3Cpath d='M-20 300C120 260 200 180 340 190S520 120 600 90'/%3E%3Cpath d='M-20 240C110 210 210 130 350 135S555 70 600 40'/%3E%3C/g%3E%3C/svg%3E");
}
.cta .wrap{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;position:relative;z-index:1}
.cta h3{font-size:clamp(22px,2.4vw,30px);font-weight:800;letter-spacing:.04em;margin:0}
.cta p{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:rgba(244,241,232,.58);margin-top:10px}

/* ---------- 16. 页脚 + 图签收尾 ---------- */
.site-footer{
  background:var(--ink);color:rgba(244,241,232,.66);padding:52px 0 0;
  border-top:0;
}
.site-footer .wrap{padding-left:var(--pad);padding-right:var(--pad)}
.foot-top,.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid var(--line-inv);max-width:calc(var(--max) - var(--pad)*2);margin:0 auto}
.foot-logo{height:40px;width:auto;display:block;margin-bottom:0}
.foot-brand .brand-cn{color:var(--canvas);font-size:19px}
.foot-desc{font-size:12.5px;line-height:2;margin-top:16px;color:rgba(244,241,232,.45);max-width:300px}
.foot-col h5{font-size:12px;font-weight:600;letter-spacing:.18em;color:var(--canvas);margin-bottom:14px}
.foot-col a,.foot-col p{display:block;font-size:13px;line-height:2.2;color:rgba(244,241,232,.55);letter-spacing:.02em}
.foot-col a:hover{color:var(--amber-bright)}
.foot-tel{font-family:var(--mono);font-size:20px;color:var(--canvas);letter-spacing:.04em;margin-top:4px}
.foot-mail{font-family:var(--mono);font-size:12px;color:rgba(244,241,232,.5);margin-top:6px}
.foot-addr{font-size:13px;line-height:2.1;color:rgba(244,241,232,.55)}
.foot-bottom{
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:16px 0;font-size:11px;color:rgba(244,241,232,.36);letter-spacing:.04em;
  max-width:calc(var(--max) - var(--pad)*2);margin:0 auto;
}
.foot-bottom a{border-bottom:1px solid rgba(244,241,232,.2)}
.foot-bottom a:hover{color:var(--canvas)}
.foot-bottom .mono{font-size:11px}
.foot-legal{max-width:720px;line-height:1.9}
.foot-legal b{color:rgba(244,241,232,.5);font-weight:400}
.sheet-bar{
  border-top:1px solid var(--line-inv);display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr 1.4fr;font-family:var(--mono);
  max-width:100%;padding:0 var(--pad);
}
.sheet-bar .tb{padding:12px 18px;border-left:1px solid var(--line-inv)}
.sheet-bar .tb:first-child{border-left:0;padding-left:0}
.sheet-bar .k{display:block;font-size:8.5px;letter-spacing:.24em;color:var(--amber-bright);margin-bottom:2px}
.sheet-bar .v{font-size:11px;letter-spacing:.1em;color:rgba(244,241,232,.8)}

/* ---------- 17. 返回顶部 ---------- */
.to-top{
  position:fixed;right:26px;bottom:28px;width:44px;height:44px;
  border:1px solid var(--line-strong);background:rgba(251,248,240,.95);color:var(--tx-2);
  font-family:var(--mono);font-size:16px;line-height:1;cursor:pointer;
  display:grid;place-items:center;opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease,border-color .2s ease,color .2s ease;
  z-index:80;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--amber);color:var(--amber)}

/* ---------- 18. 入场编排 ---------- */
@keyframes rvIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion: no-preference){
  /* 仅在 JS 可用（html.js）时才初始隐藏：无脚本环境与爬虫直接看到完整内容 */
  .js .rv,.js .reveal{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
  .js .rv.in,.js .reveal.in{opacity:1;transform:none}
  .rv-1{transition-delay:60ms}.rv-2{transition-delay:150ms}.rv-3{transition-delay:240ms}
  .js .hero-visual .ph img{transform:scale(1.06);transition:transform 1.2s var(--ease)}
  .js .hero-visual.in .ph img{transform:scale(1)}
}
@media (prefers-reduced-motion: reduce){
  .rv,.reveal{opacity:1;transform:none;transition:none}
  .scene-card .ph img,.hero-visual .ph img{transition:none}
}

/* ============================================================
   19. 内页覆盖层（作用于 style.css 的旧类名）
   ============================================================ */
.page-hero{
  color:var(--canvas);padding:52px 0 46px;position:relative;overflow:hidden;
  border-bottom:0;
  background:
    radial-gradient(640px 320px at 6% -20%, rgba(216,155,61,.08), transparent 62%),
    linear-gradient(118deg,#0E2F28 0%,#10362E 52%,#12402F 100%);
  background-repeat:no-repeat;
}
.page-hero::before{
  content:"";position:absolute;right:-40px;bottom:-30px;width:760px;height:520px;pointer-events:none;opacity:.8;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='760' height='520' viewBox='0 0 760 520'%3E%3Cg fill='none' stroke='%23D89B3D' stroke-opacity='0.22' stroke-width='1'%3E%3Cpath d='M-20 470C160 425 235 320 385 330S665 235 780 195'/%3E%3Cpath d='M-20 410C150 370 250 268 400 275S700 175 780 130'/%3E%3Cpath d='M-20 350C140 312 260 210 415 215S715 118 780 68'/%3E%3Cpath d='M-20 290C130 255 270 150 430 152S730 48 780 -6'/%3E%3C/g%3E%3C/svg%3E");
  background-size:cover;animation:none;
}
/* 图廓式底部刻度尺 */
.page-hero .page-hero-ruler,.page-hero .wrap::before{
  content:"";position:absolute;left:0;right:0;bottom:0;height:9px;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(244,241,232,.16) 0 1px,transparent 1px 64px);
  opacity:.9;
}
/* 右下角图幅注记 */
.page-hero .wrap{position:relative}
.page-hero .wrap::after{
  content:"N 33°46′ E 120°15′ · 图幅 K51E 001002 · 瑞地勘测";
  position:absolute;right:0;bottom:14px;font-family:var(--mono);
  font-size:10.5px;letter-spacing:.2em;color:rgba(244,241,232,.38);pointer-events:none;
}
.page-hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24'%3E%3Cpath d='M24 0H0v24' fill='none' stroke='%23ffffff' stroke-opacity='0.05' stroke-width='0.5'/%3E%3C/svg%3E");}
.crumb{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:rgba(244,241,232,.45);margin-bottom:16px}
.crumb a{color:rgba(244,241,232,.62)}
.crumb a:hover{color:var(--canvas)}
h1.page-title{font-size:clamp(28px,3vw,40px);font-weight:900;letter-spacing:-.01em;line-height:1.28}
h1.page-title::after{content:"";display:block;width:54px;height:3px;background:var(--amber);margin-top:16px}
.page-sub{font-size:13.5px;color:rgba(244,241,232,.62);margin-top:12px;letter-spacing:.03em;max-width:720px;line-height:1.95}
@media (max-width:760px){
  .page-hero .wrap::after{display:none}
  .page-hero .wrap::before{background-image:repeating-linear-gradient(90deg,rgba(244,241,232,.13) 0 1px,transparent 1px 40px)}
}

/* 内页卡片：去阴影、去上浮、改纸色 */
.biz,.scene,.value,.cert,.qc,.news,.equip{
  background:var(--paper);border-color:var(--line);
  transform:none!important;box-shadow:none!important;
}
.biz:hover,.scene:hover,.value:hover,.cert:hover,.qc:hover,.news:hover{
  transform:none!important;box-shadow:none!important;background:var(--paper);
  border-color:var(--line-strong);
}
.biz-line{display:none}
.biz-grid,.equip-grid,.qc-grid,.news-grid{background:var(--line);border-color:var(--line)}
.biz:hover .biz-num{color:var(--amber)}
.biz h3,.value-cn,.qc h4,.cert-body h4,.news h4{font-weight:800;letter-spacing:.02em}

/* 内页小标题与正文 */
.prose p{color:var(--tx-2)}
.prose p b{color:var(--ink);font-weight:600}
.sec-index{color:var(--amber)}
.sec-index::after{background:var(--line-strong)}
.sec-title small{color:var(--tx-2)}

/* 内页强调色硬编码替换 */
.news-tag{color:var(--amber);border-color:rgba(186,117,23,.36)}
.legal-note{
  background:rgba(186,117,23,.06);border:1px solid rgba(186,117,23,.28);
  border-left:3px solid var(--amber);color:var(--tx-2);border-radius:0;
}
.legal-note b{color:var(--ink);font-weight:600}
.svc::before{background:var(--amber)}
.ci-ic{border-color:var(--amber)}
.ci-ic::before{background:var(--amber)}
.tab.on{background:var(--ink);color:var(--canvas)}
.tab:hover{color:var(--amber)}
.pg:hover{border-color:var(--amber);color:var(--amber)}
.pg.on{background:var(--ink);border-color:var(--ink);color:var(--canvas)}
.pitem:hover .pbody h3,.pitem:hover .pgo,.item:hover h4{color:var(--amber)}
.attach:hover{border-color:var(--amber)}
.attach-ic span{color:var(--amber)}
.attach:hover .attach-btn{border-color:var(--amber);color:var(--amber)}
.side-card h3::before,.doc-body h2::before{background:var(--amber)}
.progress i{background:var(--amber)}
.tl-year{color:var(--amber)}
.tl-dot::before{border-color:var(--amber);background:var(--canvas)}
.value-en{color:var(--amber)}
.biz-side{background:var(--ink)}
.biz-side .bnum{color:var(--amber-bright)}
.cta-band{
  background:var(--ink-2);color:var(--canvas);padding:52px 0;
}
.cta-band h3{font-weight:800}
.cta-band p{color:rgba(244,241,232,.6)}
/* 深绿 CTA 带内的描边按钮必须是反白（.btn-ghost 默认为米白底墨字） */
.cta-band .btn-ghost{border-color:rgba(244,241,232,.5);color:var(--canvas);background:transparent}
.cta-band .btn-ghost:hover{border-color:var(--canvas);background:var(--canvas);color:var(--ink-2)}
.field input,.field select,.field textarea{background:var(--paper);border-color:var(--line)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--amber)}
.map-ph,.plate{background:var(--paper-dim)}
.paper-card,.side-card,.kv-card,.biz-block,.plist,.tabs{background:var(--paper);border-color:var(--line)}
.info-table .k,.badge{background:var(--paper-dim)}
.pitem:hover,.news:hover{background:rgba(10,38,32,.03)}
.year select{background:var(--paper);border-color:var(--line)}

/* 导航高亮：内页当前项 */
.nav a.active{color:var(--ink)}
.nav a.active::after{width:100%;background:var(--amber)}

/* ============================================================
   20. 响应式
   ============================================================ */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{min-height:400px;order:-1}
  .biz-row{grid-template-columns:52px 1fr;gap:10px 18px}
  .biz-row p,.biz-desc{grid-column:2}
  .biz-tags{grid-column:2;justify-content:flex-start}
  .stat-strip,.equip-grid{grid-template-columns:1fr 1fr}
  .dark-band .stat-cell,.dark-band .equip-cell{padding:30px 22px}
  .dark-band .stat-cell:nth-child(3),.dark-band .equip-cell:nth-child(3){border-left:0;padding-left:0}
  .dark-band .stat-cell:nth-child(n+3),.dark-band .equip-cell:nth-child(n+3){border-top:1px solid var(--line-inv)}
  .kpi-strip .wrap{grid-template-columns:1fr 1fr}
  .kpi:nth-child(3){border-left:0;padding-left:0}
  .kpi:nth-child(n+3){border-top:1px solid var(--line)}
  .sc-grid{grid-template-columns:1fr}
  .scene-card.big{grid-row:auto;min-height:420px}
  .flow{grid-template-columns:repeat(3,1fr);gap:32px 0}
  .step:nth-child(4){border-left:0;padding-left:0}
  .deals{grid-template-columns:1fr;gap:0}
  .foot-top,.foot-grid{grid-template-columns:1fr 1fr;gap:36px}
  .sheet-bar{grid-template-columns:1fr 1fr}
  .sheet-bar .tb{border-top:1px solid var(--line-inv)}
  .sheet-bar .tb:nth-child(-n+2){border-top:0}
  .sec-head{grid-template-columns:1fr;gap:14px}
  .sec-note,.sec-side{max-width:none;justify-self:start}
  .section-head.split{grid-template-columns:1fr;gap:18px}
}
@media (max-width:820px){
  :root{--pad:20px}
  .nav{
    position:fixed;inset:70px 0 auto 0;background:var(--canvas);color:var(--tx);
    flex-direction:column;align-items:stretch;gap:0;padding:8px 20px 20px;
    border-bottom:1px solid var(--line);transform:translateY(-12px);
    opacity:0;pointer-events:none;transition:opacity .22s ease,transform .22s ease;
    box-shadow:0 14px 26px rgba(10,38,32,.08);z-index:59;
  }
  .nav.open{opacity:1;transform:none;pointer-events:auto}
  .nav a{padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
  .nav a:last-child{border-bottom:0}
  .menu-btn{display:block}
  .header-tel{display:none}
  .platform-btn{height:32px;padding:0 11px;font-size:11.5px}
  .section{padding:56px 0}
  .dual-grid{grid-template-columns:1fr;gap:40px}
  .flow{grid-template-columns:1fr 1fr;gap:26px 0}
  .step:nth-child(odd){border-left:0;padding-left:0}
  .cred-bar .wrap{grid-template-columns:1fr 1fr}
  .cred{padding:20px 16px}
  .cred:nth-child(odd){padding-left:0;border-left:0}
  .cred:nth-child(even){border-left:1px solid var(--line)}
  .cred:nth-child(n+3){border-top:1px solid var(--line)}
  .foot-top,.foot-grid{grid-template-columns:1fr;gap:30px}
  .foot-bottom{flex-direction:column;gap:8px}
  .sheet-bar{grid-template-columns:1fr 1fr}  .geo-tag{display:none}
  .scene-body dl{max-height:220px}
  /* 移动端首屏：图收窄让标题与 CTA 进入首屏 */
  .hero-visual{min-height:280px}
  .hero-copy{padding:30px var(--pad) 30px}
  .hero-foot{gap:18px;font-size:9.5px}
}