/* 标题字体：思源宋体 Medium 500 子集（仅标题用字，81KB）
   自带而不依赖访客系统字体——否则普通 Windows 会落到 SimSun，大字号发虚 */
@font-face{
  font-family:"ChutuSerif";
  src:url("../font/chutu-serif-500.woff2") format("woff2");
  font-weight:500;
  font-style:normal;
  font-display:swap;
}
:root{
  --bg:#F4F3F0;          /* 石灰白 —— 页面主背景 */
  --surface:#ffffff;     /* 卡片 / 面板 */
  --text:#1B1B19;        /* 石墨黑 —— 正文标准文字 */
  --muted:#6B6862;       /* 石墨淡化 —— 次要文字 */
  --line:#E3E0D9;        /* 石灰白加深 —— 分隔线 */
  --accent:#3F4A42;      /* 墨绿 —— 强调主色 */
  --accent-soft:#EDF0EC; /* 墨绿淡化 —— 浅底 / 提示条 */
  --cta:#96682F;         /* 黄铜 —— 转化按钮色 */
  --gold:#C9A96A;        /* 浅铜 —— 辅助提亮 */
  --radius:2px;
  --maxw:1160px;
}
*{box-sizing:border-box}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  line-height:1.8;
  font-size:16px;
}
a{color:inherit;text-decoration:none}
/* 字体层级（来源：架构方案 5.3）：标题宋体系显东方调性，正文黑体系易读，参数数字用等宽科技感字体 */
h1,h2,h3,h4,.section-title,.brand,.band-dark h2,.entry-item h3,.biz-card .bc-n{
  font-family:"ChutuSerif","Source Han Serif SC","Noto Serif SC","Songti SC","STSong","SimSun",serif;
}
.series-no,.entry-item .idx,.ld-spec b,.cost td,.cost th,.sw-pick,.tint-hex,
.chroma-no,.art-row .ar-s,.opt-summary b,table td,table th{
  font-family:"DIN Alternate","Inter","Helvetica Neue",Arial,sans-serif;
  font-variant-numeric:tabular-nums;letter-spacing:.5px;
}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(244,243,240,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:20px}
.brand{font-size:19px;font-weight:700;letter-spacing:1px;line-height:1.2}
.brand span{display:block;font-size:10px;color:var(--muted);letter-spacing:4px;font-weight:400}
.nav{display:flex;gap:24px;font-size:15px;flex-wrap:wrap}
.nav a{padding:4px 0;border-bottom:2px solid transparent;white-space:nowrap}
.nav a:hover,.nav a.active{color:var(--accent);border-color:var(--accent)}

/* ---------- 首屏 ---------- */
.hero{padding:72px 0 60px;background:linear-gradient(180deg,var(--accent-soft),var(--bg));border-bottom:1px solid var(--line)}
.hero h1{font-size:38px;margin:0 0 14px;line-height:1.35;font-weight:700}
.hero .lead{font-size:17px;color:var(--muted);max-width:760px;margin:0 0 12px}
.hero .note{font-size:14px;color:var(--muted)}

/* ---------- 通用区块 ---------- */
.section{padding:104px 0}
.section:last-of-type{border-bottom:none}
.section-title{font-size:26px;margin:0 0 6px;font-weight:700}
.section-sub{color:var(--muted);margin:0 0 32px;font-size:15px}
h3{font-size:19px;margin:0 0 10px}
p{margin:0 0 14px}

/* ---------- 卡片 ---------- */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--surface);
  
  border-radius:var(--radius);
  padding:26px;
  transition:transform .15s ease,box-shadow .15s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.06)}
.card .tag{
  display:inline-block;font-size:12px;color:var(--accent);
  background:var(--accent-soft);border-radius:4px;padding:2px 8px;margin-bottom:10px;
}
.card p{color:var(--muted);font-size:15px;margin:0}
.card ul{color:var(--muted);font-size:15px;margin:10px 0 0;padding-left:18px}

/* ---------- 人群入口 ---------- */
.audience{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:32px}
.audience .card{border-top:3px solid var(--accent)}
.audience .card h3{margin-bottom:6px}
.audience .card .who{font-size:13px;color:var(--accent);margin-bottom:10px}

/* ---------- 占位图 ---------- */
.ph{
  border:1px dashed #D5D0C6;
  border-radius:8px;
  background:repeating-linear-gradient(45deg,#F7F5F1,#F7F5F1 10px,#F0EEE9 10px,#F0EEE9 20px);
  color:#8A857D;
  display:flex;align-items:center;justify-content:center;
  text-align:center;font-size:13px;line-height:1.6;
  padding:16px;
}
.ph-h{height:180px}
.ph-h-lg{height:320px}
.ph-h-sm{height:120px}

/* ---------- 实际图片 ---------- */
.shot{width:100%;object-fit:cover;border-radius:8px;display:block;background:#F0EEE9}
.shot-sm{height:120px}
.shot-lg{height:180px}
.shot-note{font-size:12px;color:#8A857D;margin:8px 0 0}

/* ---------- 列表 ---------- */
.steps{counter-reset:s;list-style:none;padding:0;margin:0}
.steps li{
  position:relative;padding:0 0 22px 46px;counter-increment:s;
  border-left:1px solid var(--line);margin-left:15px;
}
.steps li:last-child{border-left-color:transparent;padding-bottom:0}
.steps li::before{
  content:counter(s);position:absolute;left:-15px;top:0;
  width:30px;height:30px;border-radius:50%;
  background:var(--accent);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:14px;
}
.steps li b{display:block;margin-bottom:2px}
.steps li span{color:var(--muted);font-size:15px}

.faq details{
  background:var(--surface);border:1px solid var(--line);
  border-radius:8px;padding:14px 18px;margin-bottom:12px;
}
.faq summary{cursor:pointer;font-weight:600;outline:none}
.faq details p{color:var(--muted);font-size:15px;margin:10px 0 0}

/* ---------- 表格 ---------- */
table{width:100%;border-collapse:collapse;background:var(--surface);font-size:15px}
th,td{border:1px solid var(--line);padding:12px 14px;text-align:left}
th{background:var(--accent-soft);font-weight:600}
td.muted{color:var(--muted)}

/* ---------- 表单 ---------- */
.form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:16px}
.field label{display:block;font-size:14px;margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;padding:11px 12px;font-size:15px;font-family:inherit;
  border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--text);
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.field textarea{min-height:110px;resize:vertical}
button,.btn{
  display:inline-block;background:var(--cta);color:#fff;border:none;
  padding:12px 30px;font-size:16px;border-radius:6px;cursor:pointer;font-family:inherit;
}
.btn:hover{opacity:.9}
.btn-ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}

/* ---------- 提示条 ---------- */
.notice{
  background:var(--accent-soft);border:none;
  padding:16px 20px;border-radius:2px;font-size:13px;color:#6B6862;margin:20px 0;
}

/* ---------- 页脚 ---------- */
.site-footer{background:#1B1B19;color:#C8C3BA;padding:48px 0 24px;font-size:14px}
.site-footer a{color:#C8C3BA}
.site-footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px;margin-bottom:28px}
.site-footer h4{color:#fff;font-size:15px;margin:0 0 12px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:7px}
.footer-bottom{border-top:1px solid #2A332C;padding-top:18px;color:#8A857D;font-size:13px}

@media (max-width:900px){
  .grid-3,.grid-4,.audience,.footer-grid,.form-row{grid-template-columns:1fr 1fr}
  .hero h1{font-size:29px}
  .grid-2{grid-template-columns:1fr}
}
@media (max-width:600px){
  .grid-3,.grid-4,.audience,.footer-grid,.form-row{grid-template-columns:1fr}
}

/* ==========================================================
   首页「简约大气」版式（只作用于 .page-home）
   ========================================================== */

/* ---- 全幅首屏：大图铺满，文字压在图上（华硕式 hero 骨架，但用暖调做） ---- */
.home-hero{
  position:relative;min-height:80vh;display:flex;align-items:center;
  overflow:hidden;background:#1B1B19;border-bottom:1px solid var(--line);
}
.home-hero-bg{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center;display:block;
}
.home-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(20,17,15,.88) 0%,rgba(20,17,15,.66) 42%,rgba(20,17,15,.12) 78%);
}
.home-hero-inner{
  position:relative;z-index:2;
  max-width:var(--maxw);margin:0 auto;width:100%;
  padding:0 24px;
}
.home-hero-copy{max-width:600px;padding:96px 0}
.home-hero-copy .eyebrow{
  font-size:12px;letter-spacing:5px;color:#DCCBA4;
  text-transform:uppercase;margin-bottom:22px;
}
.home-hero-copy h1{
  font-size:clamp(30px,4.4vw,54px);line-height:1.28;margin:0 0 22px;
  font-weight:700;letter-spacing:2px;color:#fff;
}
.home-hero-copy .lead{
  font-size:16px;color:rgba(255,255,255,.86);max-width:520px;
  margin:0 0 34px;line-height:1.95;
}
.home-hero-copy .hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.home-hero-copy .btn-ghost{color:#fff;border-color:rgba(255,255,255,.72)}
.home-hero-copy .btn-ghost:hover{background:rgba(255,255,255,.1)}

/* ---- 通栏重击块（深浅节奏切换，撑住"大厂感"） ---- */
.band-dark{
  background:#2A332C;color:#fff;text-align:center;padding:100px 24px;
  border-top:1px solid var(--line);
}
.band-dark .k{font-size:12px;letter-spacing:5px;color:var(--gold);margin-bottom:20px}
.band-dark h2{
  font-size:clamp(21px,2.8vw,32px);letter-spacing:1.5px;margin:0 auto 24px;
  font-weight:700;line-height:1.6;max-width:760px;
}
.band-dark .go{
  display:inline-block;color:#fff;font-size:15px;
  border-bottom:1px solid rgba(255,255,255,.55);padding-bottom:4px;
}
.band-dark .go:hover{border-color:#fff}

/* ---- 卡片：图占主导 + hover 微动（电商卡片规范，但只有 3 张不堆墙） ---- */
.card{overflow:hidden}
.card .shot{transition:transform .55s ease}
.card:hover .shot{transform:scale(1.045)}

/* ---- 三入口：去卡片化，改用细线分隔的大号文字块 ---- */
.entry-list{border-top:1px solid var(--line)}
.entry-item{
  display:grid;grid-template-columns:56px 1fr auto;align-items:center;gap:28px;
  padding:34px 8px;border-bottom:1px solid var(--line);
  transition:padding-left .18s ease;
}
.entry-item:hover{padding-left:20px}
.entry-item .idx{font-size:13px;color:var(--accent);letter-spacing:1px}
.entry-item h3{margin:0 0 6px;font-size:21px;letter-spacing:.5px}
.entry-item p{margin:0;color:var(--muted);font-size:15px;line-height:1.7}
.entry-item .go{font-size:14px;color:var(--accent);white-space:nowrap}

/* ---- 通栏大图区 ---- */
.band{width:100%;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band img{width:100%;height:52vh;min-height:320px;object-fit:cover;display:block}
.band-caption{
  max-width:var(--maxw);margin:0 auto;padding:14px 24px;
  font-size:12px;color:#8A857D;
}

/* ---- 双业务：大型图文块 ---- */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:0}
.duo-item{position:relative;display:block;min-height:400px;overflow:hidden;background:#EDEAE3}
.duo-item img{width:100%;height:100%;min-height:400px;object-fit:cover;display:block;
  transition:transform .5s ease}
.duo-item:hover img{transform:scale(1.03)}
.duo-overlay{
  position:absolute;inset:auto 0 0 0;padding:34px 32px;
  background:linear-gradient(0deg,rgba(24,21,19,.72),rgba(24,21,19,0));
  color:#fff;
}
.duo-overlay h3{color:#fff;font-size:24px;margin:0 0 8px;letter-spacing:1px}
.duo-overlay p{color:rgba(255,255,255,.82);font-size:14px;margin:0 0 10px;max-width:420px}
.duo-overlay .go{font-size:13px;color:#fff;border-bottom:1px solid rgba(255,255,255,.6);padding-bottom:2px}

/* ---- 极简数据/能力条 ---- */
.mini-facts{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.mini-facts div{padding:30px 24px;border-right:1px solid var(--line)}
.mini-facts div:last-child{border-right:none}
.mini-facts b{display:block;font-size:15px;margin-bottom:6px;letter-spacing:.5px}
.mini-facts span{font-size:14px;color:var(--muted);line-height:1.7}

/* ---- 首页顶栏：首屏透明压图，滚动后转实体 ---- */
.page-home .site-header{
  background:transparent;border-bottom-color:rgba(255,255,255,.16);backdrop-filter:none;
  transition:background .25s ease,border-color .25s ease;
}
.page-home .site-header .brand{color:#fff}
.page-home .site-header .brand span{color:rgba(255,255,255,.62)}
.page-home .site-header .nav a{color:rgba(255,255,255,.86)}
.page-home .site-header .nav a:hover,
.page-home .site-header .nav a.active{color:#fff;border-color:#DCCBA4}
.page-home .site-header.is-solid{
  background:rgba(244,243,240,.96);border-bottom-color:var(--line);backdrop-filter:blur(8px);
}
.page-home .site-header.is-solid .brand{color:var(--text)}
.page-home .site-header.is-solid .brand span{color:var(--muted)}
.page-home .site-header.is-solid .nav a{color:var(--text)}
.page-home .site-header.is-solid .nav a:hover,
.page-home .site-header.is-solid .nav a.active{color:var(--accent);border-color:var(--accent)}

/* ---- 首屏底部小字说明 ---- */
.hero-note{
  position:absolute;z-index:2;right:24px;bottom:20px;
  font-size:11px;color:rgba(255,255,255,.55);letter-spacing:.5px;
}

/* ---- 服务区域（深色通栏，节奏切换） ---- */
.band-dark .sub{font-size:14px;color:rgba(255,255,255,.66);margin-bottom:26px;line-height:1.9}

/* ---- 区块标题行：标题左、更多右 ---- */
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:28px}
.sec-head .section-title{margin:0}
.sec-more{font-size:14px;color:var(--accent);white-space:nowrap}

/* ---- 案例卡：图占主导，文字极简（无框、无阴影） ---- */
.case-card{padding:0;border:none;background:transparent;border-radius:0}
.case-card:hover{transform:none;box-shadow:none}
.case-card .shot{height:250px;object-fit:cover;border-radius:4px}
.case-card h3{margin:16px 0 4px;font-size:18px;letter-spacing:.5px}
.case-card:hover h3{color:var(--accent)}

/* ---- 大留白收尾 CTA ---- */
.cta-quiet{
  text-align:center;padding:104px 24px;
  background:linear-gradient(180deg,var(--bg),#F0EEE9);
}
.cta-quiet h2{font-size:clamp(24px,3vw,36px);margin:0 0 16px;letter-spacing:2px;font-weight:700}
.cta-quiet p{color:var(--muted);max-width:560px;margin:0 auto 34px;line-height:1.95}

/* ==========================================================
   全站组件 v2（11 页站点）
   ========================================================== */

/* ---- 顶部导航：支持二级下拉 ---- */
.nav{display:flex;gap:26px;font-size:15px;align-items:center}
.nav-item{position:relative}
.nav-item > a{display:inline-block;padding:22px 0;border-bottom:2px solid transparent}
.nav-item > a:hover,.nav-item > a.active{color:var(--accent);border-color:var(--accent)}
.subnav{
  position:absolute;left:-18px;top:100%;min-width:190px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:8px;box-shadow:0 10px 30px rgba(0,0,0,.08);
  padding:8px 0;opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s;
  z-index:60;
}
.nav-item:hover .subnav{opacity:1;visibility:visible;transform:translateY(0)}
/* 桌面端不显示展开箭头（靠 hover），移动端由脚本生成并显示 */
.nav-toggle{display:none}
/* ---- 手机端汉堡菜单：≤1000px 导航收进下拉面板 ---- */
.menu-btn{display:none;flex-direction:column;justify-content:center;gap:4px;
  width:40px;height:38px;padding:10px 11px;background:none;
  border:1px solid var(--line);border-radius:8px;cursor:pointer;flex:none}
.menu-btn span{display:block;height:2px;background:var(--text);border-radius:1px}
.page-home .site-header:not(.is-solid) .menu-btn{border-color:rgba(255,255,255,.4)}
.page-home .site-header:not(.is-solid) .menu-btn span{background:#fff}

@media (max-width:1000px){
  .nav-toggle{
    display:inline-block;width:22px;height:22px;margin-left:2px;
    background:none;border:none;cursor:pointer;vertical-align:middle;
  }
  .nav-toggle i{
    display:block;width:7px;height:7px;margin:6px auto;
    border-right:1.5px solid var(--text);border-bottom:1.5px solid var(--text);
    transform:rotate(45deg);transition:transform .18s ease;
  }
  .nav-item.open .nav-toggle i{transform:rotate(-135deg)}
}
.subnav a{display:block;padding:9px 20px;font-size:14px;color:var(--text);border:none}
.subnav a:hover{background:var(--accent-soft);color:var(--accent)}
.subnav .sub-desc{display:block;font-size:12px;color:var(--muted);margin-top:2px}
.header-cta{
  display:inline-block;background:var(--accent);color:#fff;
  padding:9px 20px;border-radius:6px;font-size:14px;white-space:nowrap;
}
.header-cta:hover{opacity:.9}
@media (max-width:1000px){
  .header-cta{display:none}
  .nav{gap:16px;font-size:14px}
}

/* ---- 内页页头 ---- */
.page-head{
  background:linear-gradient(180deg,var(--accent-soft),var(--bg));
  border-bottom:1px solid var(--line);padding:56px 0 48px;
}
.page-head .eyebrow{font-size:12px;letter-spacing:4px;color:var(--accent);margin-bottom:14px}
.page-head h1{font-size:clamp(26px,3.4vw,40px);margin:0 0 14px;letter-spacing:1px;font-weight:700;line-height:1.4}
.page-head .lead{color:var(--muted);max-width:700px;margin:0;font-size:16px;line-height:1.95}
.page-head .hero-actions{margin-top:26px}

/* ---- 系列展示块：图 / 文交替 ---- */
.series{padding:0}
.series-item{
  display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:0;
  border-bottom:1px solid var(--line);
}
.series-item:nth-child(even) .series-media{order:2}
.series-media{position:relative;overflow:hidden;min-height:340px;background:#EDEAE3}
.series-media img{width:100%;height:100%;min-height:340px;object-fit:cover;display:block;
  transition:transform .6s ease}
.series-item:hover .series-media img{transform:scale(1.04)}
.series-copy{padding:52px 56px}
.series-no{font-size:12px;letter-spacing:3px;color:var(--accent);margin-bottom:12px}
.series-copy h2{font-size:28px;margin:0 0 6px;font-weight:700;letter-spacing:1px}
.series-en{font-size:12px;letter-spacing:3px;color:#6B6862;margin-bottom:18px}
.series-copy p{color:var(--muted);line-height:1.95;margin:0 0 20px}
.series-meta{display:grid;grid-template-columns:1fr 1fr;gap:14px 22px;margin-bottom:22px}
.series-meta div{border-top:1px solid var(--line);padding-top:10px}
.series-meta b{display:block;font-size:12px;color:#6B6862;font-weight:400;margin-bottom:3px}
.series-meta span{font-size:14px}

/* ---- 系列就近试色（点色在该系列肌理图上换色，零流量） ---- */
.series-media{isolation:isolate}
.series-media .fx-layer,.series-media .fx-shade{position:absolute;inset:0;pointer-events:none}
.series-media .fx-layer{background:var(--fx-tint,#9A948B);mix-blend-mode:multiply;opacity:.66}
.series-media .fx-shade{background:var(--fx-tint,#9A948B);mix-blend-mode:screen;opacity:.14}
.series-media.off .fx-layer,.series-media.off .fx-shade{display:none}
.series-media.tinting img{filter:grayscale(.5) saturate(.62) contrast(1.02)}
.fx-try{margin:0 0 20px;padding:14px 16px;border:1px solid var(--line);border-radius:8px;background:#F7F5F1}
.fx-try-t{font-size:12px;letter-spacing:1px;color:#6B6862;margin-bottom:10px}
.fx-picks{display:flex;flex-wrap:wrap;gap:8px}
.fx-pick{
  width:26px;height:26px;border-radius:50%;border:2px solid transparent;
  box-shadow:0 0 0 1px var(--line) inset;cursor:pointer;padding:0;
  transition:transform .15s ease,border-color .15s ease;
}
.fx-pick:hover{transform:scale(1.12)}
.fx-pick.on{border-color:var(--accent);transform:scale(1.14)}
.fx-now{margin-top:11px;font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.fx-now b{color:var(--ink);font-weight:600}
.fx-now i{font-style:normal;color:#6B6862;font-size:12px}
.fx-reset{background:none;border:none;padding:0;font-size:12px;color:var(--accent);cursor:pointer;text-decoration:underline}
.fx-now a{font-size:12px;color:var(--accent);text-decoration:underline}
/* 光泽档位：哑光吃色重、高光要提亮，否则鎏金叠色会发闷 */
.series-media[data-gl="matte"] .fx-layer{opacity:.70}
.series-media[data-gl="matte"] .fx-shade{opacity:.08}
.series-media[data-gl="matte"].tinting img{filter:grayscale(.58) saturate(.5) contrast(1.02)}
.series-media[data-gl="semi"] .fx-shade{opacity:.20}
.series-media[data-gl="semi"].tinting img{filter:grayscale(.5) saturate(.6) contrast(1.04)}
.series-media[data-gl="high"] .fx-layer{opacity:.46}
.series-media[data-gl="high"] .fx-shade{opacity:.40}
.series-media[data-gl="high"].tinting img{filter:grayscale(.38) saturate(.48) contrast(1.10) brightness(1.06)}

/* ---- 四业务入口卡 ---- */
.biz-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.biz-card{background:var(--surface);padding:34px 26px;transition:background .2s ease}
.biz-card:hover{background:#fff}
.biz-card .bc-n{font-size:26px;font-weight:700;letter-spacing:2px;margin-bottom:4px}
.biz-card .bc-sub{font-size:13px;color:var(--accent);margin-bottom:12px}
.biz-card p{font-size:13px;color:var(--muted);line-height:1.8;min-height:70px}
.biz-card .go{font-size:13px;color:var(--accent)}
@media (max-width:900px){.biz-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.biz-grid{grid-template-columns:1fr}.biz-card p{min-height:auto}}

/* ---- 潮壁：五层交互剖面 ---- */
.wall{display:grid;grid-template-columns:270px 1fr;gap:26px;align-items:start}
.wall-stack{display:flex;flex-direction:column;gap:6px}
.layer-bar{
  display:flex;align-items:center;gap:12px;width:100%;
  padding:16px 18px;background:var(--surface);border:1px solid var(--line);
  border-radius:6px;cursor:pointer;text-align:left;
  transition:border-color .18s ease,background .18s ease;
}
.layer-bar:hover{border-color:var(--accent)}
.layer-bar.on{border-color:var(--accent);background:#fff;box-shadow:0 1px 0 var(--accent) inset}
.layer-bar .lb-no{font-size:12px;letter-spacing:2px;color:var(--accent);min-width:26px}
.layer-bar .lb-cn{font-size:15px;font-weight:600}
.wall-details{position:relative}
.layer-detail{display:none;padding:26px 28px;background:var(--surface);border:1px solid var(--line);border-radius:8px}
.layer-detail.on{display:block}
.layer-detail .ld-code{font-size:12px;letter-spacing:3px;color:var(--accent);margin-bottom:8px}
.layer-detail h3{font-size:22px;margin:0 0 12px}
.layer-detail .ld-plain{font-size:15px;line-height:1.9;color:var(--muted);margin:0 0 16px}
.layer-detail .ld-spec{border-top:1px solid var(--line);padding-top:12px}
.layer-detail .ld-spec b{display:block;font-size:12px;color:#6B6862;font-weight:400;margin-bottom:4px}
.layer-detail .ld-spec span{font-size:14px}
@media (max-width:900px){.wall{grid-template-columns:1fr}}

/* ---- 矿物色谱色块 ---- */
.chroma-chip{height:110px;border-radius:6px;margin-bottom:14px;border:1px solid var(--line)}

/* ---- 七种肌理 ---- */
.tex-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.tex-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden;
  padding:0;cursor:pointer;text-align:left;position:relative;transition:border-color .18s ease}
.tex-card:hover{border-color:var(--accent)}
.tex-card img{width:100%;height:170px;object-fit:cover;display:block}
.tex-card .tc-body{padding:14px 16px 18px}
.tex-card h3{font-size:16px;margin:0 0 6px}
.tex-card p{font-size:13px;color:var(--muted);margin:0 0 8px;line-height:1.7}
.tex-card .tc-body span{font-size:12px;color:#6B6862}
.tex-card .tc-zoom{position:absolute;right:12px;top:12px;background:rgba(0,0,0,.55);color:#fff;
  font-size:12px;padding:4px 10px;border-radius:20px;opacity:0;transition:opacity .18s ease}
.tex-card:hover .tc-zoom{opacity:1}
@media (max-width:900px){.tex-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.tex-grid{grid-template-columns:1fr}}
.lightbox{position:fixed;inset:0;z-index:120;background:rgba(20,18,16,.92);
  display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px}
.lightbox[hidden]{display:none}
.lightbox img{max-width:min(920px,92vw);max-height:72vh;object-fit:contain;border-radius:6px}
.lightbox .lb-close{position:absolute;top:20px;right:26px;background:none;border:none;
  color:#fff;font-size:36px;line-height:1;cursor:pointer}
.lightbox .lb-cap{margin-top:18px;text-align:center;color:#fff}
.lightbox .lb-cap b{display:block;font-size:18px;margin-bottom:6px}
.lightbox .lb-cap span{display:block;font-size:13px;color:#C8C3BA}
.lightbox .lb-cap i{display:block;font-style:normal;font-size:12px;color:#6B6862;margin-top:4px}
.qr-ph{border:1px dashed var(--line);border-radius:8px;padding:34px;text-align:center;
  color:#6B6862;font-size:13px;margin:12px 0}

/* ---- 选配功能 ---- */
.opt-wrap{display:grid;grid-template-columns:1.5fr 1fr;gap:24px;align-items:start}
.opt-groups{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.opt-group{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px 18px}
.opt-group .og-head{font-size:13px;letter-spacing:2px;color:var(--accent);margin-bottom:12px}
.opt-item{display:flex;gap:10px;align-items:flex-start;padding:8px 0;cursor:pointer}
.opt-item input{position:absolute;opacity:0;width:0;height:0}
.opt-item .oi-box{flex:0 0 18px;width:18px;height:18px;border:1px solid var(--line);border-radius:4px;
  background:#fff;margin-top:2px;position:relative}
.opt-item input:checked + .oi-box{background:var(--accent);border-color:var(--accent)}
.opt-item input:checked + .oi-box::after{content:"";position:absolute;left:5px;top:2px;
  width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}
.opt-item .oi-txt b{display:block;font-size:14px;font-weight:600}
.opt-item .oi-txt i{font-style:normal;font-size:12px;color:#6B6862;line-height:1.7}
.opt-summary{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:22px}
.opt-summary .os-count{font-size:14px;color:var(--muted);margin-bottom:12px}
.opt-summary .os-count b{font-size:24px;color:var(--accent);margin:0 4px}
.opt-summary .os-list{list-style:none;margin:0 0 18px;padding:0;min-height:52px}
.opt-summary .os-list li{font-size:13px;padding:5px 0;border-bottom:1px dashed var(--line)}
.opt-summary .os-list .os-empty{color:#6B6862;border:none}
.opt-summary .btn{display:block;text-align:center}
@media (max-width:900px){.opt-wrap{grid-template-columns:1fr}.opt-groups{grid-template-columns:1fr}}

/* ---- 潮改：前后对比滑动 ---- */
.cmp{position:relative;overflow:hidden;border-radius:8px;background:#E3E0D9;line-height:0}
.cmp .cmp-img{width:100%;height:auto;display:block;max-height:520px;object-fit:cover}
.cmp .cmp-clip{position:absolute;inset:0;width:50%;overflow:hidden}
.cmp .cmp-clip .cmp-img{height:100%;max-height:none;object-fit:cover}
.cmp .cmp-tag{position:absolute;top:14px;font-size:12px;background:rgba(0,0,0,.5);color:#fff;
  padding:4px 12px;border-radius:20px;line-height:1.6}
.cmp .cmp-tag-l{left:14px}
.cmp .cmp-tag-r{right:14px}
.cmp .cmp-range{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);
  width:62%;z-index:3;accent-color:var(--accent)}
.sell-pre{margin-top:12px;border-top:1px solid var(--line);padding-top:10px}
.sell-pre b{display:block;font-size:12px;color:#6B6862;font-weight:400;margin-bottom:3px}
.sell-pre span{font-size:12.5px;color:var(--muted);line-height:1.75}
.scene-card .sc-body{padding:16px 18px 20px}
.scene-card .sc-who{font-size:12px;color:var(--accent);margin:2px 0 8px}

/* ---- 作品库：三维筛选 ---- */
.filter-row{display:flex;align-items:center;gap:14px;margin-bottom:12px;flex-wrap:wrap}
.fl-label{font-size:13px;color:#6B6862;min-width:52px}
.filters{display:flex;flex-wrap:wrap;gap:8px}
.filter{border:1px solid var(--line);background:#fff;border-radius:20px;padding:5px 15px;
  font-size:13px;cursor:pointer;color:var(--muted);transition:border-color .15s ease,color .15s ease}
.filter:hover{border-color:var(--accent);color:var(--accent)}
.filter.on{border-color:var(--accent);color:var(--accent);font-weight:600}
.filter-count{font-size:13px;color:var(--muted);margin:16px 0}
.filter-count b{color:var(--accent)}
.work-card .wc-tags{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.work-card .wc-tags span{font-size:11px;color:var(--muted);border:1px solid var(--line);
  border-radius:12px;padding:2px 9px}
.work-card .wc-tags .wt-biz{border-color:var(--accent);color:var(--accent)}

/* ---- 矿物志栏目 ---- */
.col-card .cc-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px}
.col-card .cc-head h3{font-size:19px;margin:0}
.col-card .cc-freq{font-size:12px;color:var(--accent)}
.col-card .cc-desc{font-size:13px;color:var(--muted);margin:8px 0 14px;line-height:1.8}
.art-row{display:flex;justify-content:space-between;gap:12px;padding:10px 0;
  border-top:1px dashed var(--line);font-size:13.5px}
.art-row .ar-s{color:#6B6862;font-size:12px;white-space:nowrap}

/* ---- FAQ ---- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{padding:18px 4px;cursor:pointer;font-size:16px;list-style:none;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:8px;color:var(--accent);font-size:20px}
.faq-item[open] summary::after{content:"–"}
.faq-item .faq-a{padding:0 4px 20px;font-size:14.5px;line-height:1.95;color:var(--muted)}

/* ---- 色卡 ---- */
.swatches{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.swatch{border-radius:6px;overflow:hidden;border:1px solid var(--line);background:var(--surface)}
.swatch .chip{height:96px}
.swatch .cap{padding:10px 12px;font-size:13px}
.swatch .cap span{display:block;color:#6B6862;font-size:11px;margin-top:2px}

/* ---- 配色预览器：底图去色后叠色，零额外流量，切换即时 ---- */
.tinter{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--surface)}
.tinter-views{display:grid;grid-template-columns:1fr 1.2fr;gap:2px;background:var(--line)}
.tint-view{position:relative;isolation:isolate;margin:0;background:#E3E0D9;overflow:hidden}
.tint-view img{width:100%;height:100%;min-height:260px;object-fit:cover;display:block;
  filter:grayscale(1) brightness(1.06) contrast(1.02)}
.tint-view .tint-ser{
  position:absolute;inset:0;width:100%;height:100%;min-height:260px;
  object-fit:cover;display:none;
  filter:grayscale(1) brightness(1.06) contrast(1.06);
}
.tint-view.has-ser .tint-ser{display:block}
.tint-view.has-ser>img.tint-base{visibility:hidden}
.tint-view .tint-ser-soft{
  position:absolute;inset:0;width:100%;height:100%;min-height:260px;
  object-fit:cover;display:none;mix-blend-mode:soft-light;opacity:.55;
  filter:grayscale(1) contrast(1.05);
}
.tint-view .tint-layer{position:absolute;inset:0;background:var(--tint,#9A948B);
  mix-blend-mode:color;opacity:.96;transition:background .28s ease}
.tint-view .tint-shade{position:absolute;inset:0;background:var(--tint,#9A948B);
  mix-blend-mode:multiply;opacity:.1;transition:background .28s ease}
.tint-view.off .tint-layer,.tint-view.off .tint-shade{display:none}
/* 上墙效果：只给墙面区域上色（上部约六成），沙发与地面保留原色，更像真实刷墙 */
.tint-room .tint-layer,.tint-room .tint-ser-soft{
  -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 50%,rgba(0,0,0,.55) 64%,rgba(0,0,0,.18) 82%,rgba(0,0,0,.12) 100%);
  mask-image:linear-gradient(180deg,#000 0%,#000 50%,rgba(0,0,0,.55) 64%,rgba(0,0,0,.18) 82%,rgba(0,0,0,.12) 100%);
}
.tint-room .tint-layer{opacity:.9}
.tint-room .tint-shade{
  -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 52%,rgba(0,0,0,.3) 75%,rgba(0,0,0,.1) 100%);
  mask-image:linear-gradient(180deg,#000 0%,#000 52%,rgba(0,0,0,.3) 75%,rgba(0,0,0,.1) 100%);
}
.tint-view figcaption{
  position:absolute;left:0;bottom:0;z-index:2;
  background:linear-gradient(0deg,rgba(0,0,0,.5),rgba(0,0,0,0));
  color:#fff;font-size:13px;padding:22px 16px 12px;width:100%;
}
.tinter-bar{padding:20px 22px;border-top:1px solid var(--line)}
.tinter-info{display:flex;align-items:baseline;gap:10px;margin-bottom:14px}
.tinter-info b{font-size:20px}
.tinter-info span{font-size:12px;letter-spacing:2px;color:var(--muted)}
.tinter-bar .note{margin-top:12px}
.ser-picks{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.ser-pick{
  border:1px solid var(--line);background:#fff;border-radius:20px;
  padding:5px 14px;font-size:13px;cursor:pointer;color:var(--muted);
  transition:border-color .15s ease,color .15s ease;
}
.ser-pick:hover{border-color:var(--accent);color:var(--accent)}
.ser-pick.on{border-color:var(--accent);color:var(--accent);font-weight:600}
.ser-tip{font-size:12px;color:#6B6862;margin:-6px 0 12px}
.sw-picks{display:flex;flex-wrap:wrap;gap:10px}
.sw-pick{
  width:44px;height:44px;border-radius:50%;border:2px solid transparent;
  box-shadow:0 0 0 1px var(--line) inset;cursor:pointer;padding:0;
  transition:transform .15s ease,border-color .15s ease;
}
.sw-pick:hover{transform:scale(1.08)}
.sw-pick.on{border-color:var(--accent);transform:scale(1.1)}
.tint-reset{
  margin-top:14px;background:none;border:1px solid var(--line);border-radius:6px;
  padding:7px 16px;font-size:13px;color:var(--muted);cursor:pointer;
}
.tint-reset:hover{border-color:var(--accent);color:var(--accent)}
@media (max-width:900px){
  .tinter-views{grid-template-columns:1fr}
  .tint-view img{min-height:200px}
}
.palette-row{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-radius:8px;overflow:hidden;border:1px solid var(--line)}
.palette-row div{height:110px;display:flex;align-items:flex-end;padding:10px 12px;font-size:12px}

/* ---- 案例筛选 ---- */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.filter{
  padding:8px 18px;border:1px solid var(--line);border-radius:20px;
  font-size:14px;cursor:pointer;background:var(--surface);color:var(--muted);
}
.filter.on{background:var(--accent);border-color:var(--accent);color:#fff}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}

/* ---- 客户 / 背书 logo 墙（占位） ---- */
.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.logo-wall div{
  background:var(--surface);height:96px;display:flex;align-items:center;justify-content:center;
  color:#8A857D;font-size:13px;text-align:center;padding:8px;
}

/* ---- 数据条 ---- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats div{padding:34px 24px;border-right:1px solid var(--line);text-align:center}
.stats div:last-child{border-right:none}
.stats b{display:block;font-size:32px;color:var(--accent);margin-bottom:8px;font-weight:700}
.stats span{font-size:13px;color:var(--muted)}

/* ---- 图文分栏 ---- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:0;align-items:center}
.split-media{min-height:320px;background:#EDEAE3}
.split-media img{width:100%;height:100%;min-height:320px;object-fit:cover;display:block}
.split-copy{padding:52px 48px}

/* ---- 表单卡片 ---- */
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:32px}
.form-note{font-size:12px;color:#6B6862;margin-top:12px}
.field label em{color:#c0392b;font-style:normal;margin-left:2px}
.form-card .field input,.form-card .field select,.form-card .field textarea{width:100%}
.form-card button[type=submit]{cursor:pointer}
.form-card button[type=submit]:disabled{opacity:.6;cursor:default}
.form-msg{
  display:block;margin-top:14px;padding:10px 14px;border-radius:6px;
  font-size:14px;background:#fdf1ef;color:#a33;border:1px solid #f0d9d4;
}
.form-msg.ok{background:#f0f7f1;color:#2f6b3c;border-color:#d6e8d9}

/* ---- 联系卡片 ---- */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:28px}
.contact-card h3{margin-bottom:8px}
.contact-card .for{font-size:12px;color:var(--accent);margin-bottom:14px}
.contact-card p{color:var(--muted);font-size:14px}

/* ---- 社交入口 ---- */
.social-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.social-card{
  background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:28px 20px;text-align:center;display:block;
  transition:transform .15s ease,box-shadow .15s ease;
}
.social-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.06)}
.social-card.off,.social-card.wait{background:#F0EEE9;opacity:.6;cursor:default}
.social-card.off:hover,.social-card.wait:hover{transform:none;box-shadow:none}
.ico{width:46px;height:46px;border-radius:10px;margin:0 auto 14px}
.ico-wechat{background:#dfe9d8}
.ico-douyin{background:#e7e2ec}
.ico-xiaohongshu{background:#f2e0e0}
.ico-bili{background:#dde7ef}
.social-card h3{font-size:16px;margin-bottom:6px}
.social-card p{font-size:13px;color:var(--muted);margin:0 0 8px}
.pending{font-size:13px;color:#6B6862}
.social-card .pending{font-size:12px;color:#6B6862}
.social-section .section-sub{margin-bottom:26px}
.social-line{border-top:1px solid #2A332C;padding-top:16px;margin-bottom:18px;color:#8A857D;font-size:13px}
.social-line a{color:#C8C3BA;margin-right:14px}
.social-line a:hover{color:#fff}
.social-line .off{color:#8A857D;margin-right:14px}

/* ---- 历程（占位） ---- */
.timeline{border-left:1px solid var(--line);padding-left:28px;margin-left:8px}
.timeline div{position:relative;padding-bottom:26px}
.timeline div::before{
  content:"";position:absolute;left:-33px;top:8px;width:9px;height:9px;
  border-radius:50%;background:var(--accent);
}
.timeline b{display:block;font-size:15px;margin-bottom:4px}
.timeline span{color:var(--muted);font-size:14px}

@media (max-width:900px){
  .series-item,.split{grid-template-columns:1fr}
  .series-item:nth-child(even) .series-media{order:0}
  .series-copy,.split-copy{padding:36px 24px}
  .swatches{grid-template-columns:repeat(3,1fr)}
  .palette-row{grid-template-columns:repeat(3,1fr)}
  .case-grid{grid-template-columns:1fr 1fr}
  .logo-wall{grid-template-columns:repeat(3,1fr)}
  .stats{grid-template-columns:1fr 1fr}
  .stats div:nth-child(2n){border-right:none}
  .contact-grid{grid-template-columns:1fr}
  .social-grid{grid-template-columns:1fr 1fr}
  .nav-item .subnav{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;padding:0 0 0 12px;display:none}
  /* 手机没有 hover，改成点箭头开合（脚本给 .nav-item 加 .open） */
  .nav-item.open .subnav{display:block}
}
@media (max-width:600px){
  .case-grid{grid-template-columns:1fr}
  .swatches{grid-template-columns:repeat(2,1fr)}
  .palette-row{grid-template-columns:repeat(2,1fr)}
}

/* ---- 服务区域（极简一行） ---- */
.region-line{
  text-align:center;padding:78px 24px;border-top:1px solid var(--line);
}
.region-line .k{font-size:12px;letter-spacing:5px;color:var(--accent);margin-bottom:18px}
.region-line .v{font-size:clamp(18px,2.2vw,26px);letter-spacing:2px;line-height:2}
.region-line .sub{font-size:14px;color:var(--muted);margin-top:16px}

@media (max-width:900px){
  .hide-sm{display:none}
  .home-hero{min-height:70vh}
  .home-hero::after{background:linear-gradient(0deg,rgba(20,17,15,.92) 0%,rgba(20,17,15,.62) 55%,rgba(20,17,15,.25) 100%)}
  .home-hero-copy{padding:64px 0 72px;max-width:none}
  .home-hero-copy h1{font-size:30px}
  .hero-note{display:none}
  .duo{grid-template-columns:1fr}
  .mini-facts{grid-template-columns:1fr 1fr}
  .mini-facts div:nth-child(2n){border-right:none}
  .entry-item{grid-template-columns:36px 1fr;gap:14px}
  .entry-item .go{display:none}
  .band img{height:34vh}
}

/* ---- 首屏双图层：矿物原石随滚动渐变成墙面（替代视频，省流量） ---- */
.hh-media{position:absolute;inset:0;overflow:hidden}
.hh-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.hh-main{transform-origin:center;transition:transform .12s linear}
.hh-sub{opacity:0}

/* ---- 东方矿物原产地卡片 ---- */
.ori-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.ori-card{display:block;background:var(--surface);border:none;padding:26px 18px;text-align:left;cursor:pointer;font:inherit;color:inherit}
.ori-card:hover{background:#fff}
.ori-chip{display:block;height:64px;border-radius:4px;margin-bottom:14px;border:1px solid rgba(0,0,0,.08)}
.ori-name{display:block;font-size:17px;font-weight:500;margin-bottom:4px}
.ori-mn{display:block;font-size:12px;color:var(--muted);line-height:1.6;min-height:38px}
.ori-more{display:block;font-size:12px;color:var(--accent);margin-top:8px}
@media (max-width:900px){.ori-grid{grid-template-columns:repeat(2,1fr)}}
.ori-modal{position:fixed;inset:0;z-index:120;background:rgba(28,26,24,.72);display:flex;align-items:center;justify-content:center;padding:24px}
.ori-modal[hidden]{display:none}
.ori-modal-in{position:relative;background:var(--surface);border-radius:12px;max-width:560px;width:100%;padding:34px;display:grid;grid-template-columns:120px 1fr;gap:26px}
.ori-modal-in .lb-close{position:absolute;right:14px;top:8px;background:none;border:none;font-size:26px;color:var(--muted);cursor:pointer}
.om-chip{height:120px;border-radius:6px;border:1px solid rgba(0,0,0,.08)}
.om-copy b{font-size:22px;font-weight:500}
.om-copy i{display:block;font-style:normal;font-size:12px;letter-spacing:2px;color:var(--muted);margin:4px 0 14px}
.om-copy p{font-size:14px;color:var(--muted);line-height:1.9;margin:0 0 6px}
@media (max-width:600px){.ori-modal-in{grid-template-columns:1fr;padding:26px}.om-chip{height:80px}}

/* ---- 品牌叙事四步 ---- */
.story-steps{list-style:none;margin:30px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.story-steps li{background:var(--surface);padding:30px 24px}
.story-steps b{display:block;font-size:16px;font-weight:500;margin-bottom:8px;color:var(--cta)}
.story-steps span{font-size:13px;color:var(--muted);line-height:1.8}
@media (max-width:900px){.story-steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.story-steps{grid-template-columns:1fr}}

/* ---- 精品案例轮播 ---- */
.case-slider{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;margin-top:22px}
.cs-view{overflow:hidden;border-radius:8px}
.cs-track{display:flex;transition:transform .45s ease}
.cs-slide{flex:0 0 100%;margin:0;position:relative;cursor:pointer}
.cs-slide img{width:100%;height:58vh;min-height:340px;object-fit:cover;display:block}
.cs-slide figcaption{position:absolute;left:0;bottom:0;width:100%;padding:34px 22px 16px;
  background:linear-gradient(0deg,rgba(24,21,19,.74),rgba(24,21,19,0));color:#fff}
.cs-slide figcaption b{font-size:20px;font-weight:500;margin-right:12px}
.cs-slide figcaption span{font-size:13px;color:rgba(255,255,255,.8)}
.cs-nav{background:var(--surface);border:1px solid var(--line);border-radius:50%;
  width:44px;height:44px;font-size:20px;color:var(--accent);cursor:pointer;line-height:1}
.cs-nav:hover{border-color:var(--accent)}
.cs-dots{display:flex;justify-content:center;gap:8px;margin-top:14px}
.cs-dot{width:8px;height:8px;padding:0;border-radius:50%;border:1px solid var(--accent);background:transparent;cursor:pointer}
.cs-dot.on{background:var(--cta);border-color:var(--cta)}
@media (max-width:600px){.cs-slide img{height:42vh;min-height:240px}.cs-nav{width:36px;height:36px}}


/* ---- 手机端汉堡菜单面板（放文件末尾以覆盖全部旧导航规则） ---- */
@media (max-width:1000px){
  .menu-btn{display:flex}
  .header-inner{height:58px;gap:12px}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;font-size:15px;text-align:left;
    background:var(--bg);border-bottom:1px solid var(--line);
    padding:4px 24px 14px;box-shadow:none}
  .nav.open{display:flex}
  .nav a{padding:12px 0;border-bottom:none}
  .nav-item{display:flex;align-items:center;flex-wrap:wrap;border-bottom:1px solid var(--line)}
  .nav-item:last-child{border-bottom:none}
  .nav-item > a{flex:1;display:block;padding:12px 0;border-bottom:none}
  .nav-item .nav-toggle{flex:none}
  .nav-item .subnav{width:100%}
  .page-home .site-header .nav a{color:var(--text)}
  .page-home .site-header .nav a:hover,
  .page-home .site-header .nav a.active{color:var(--accent);border-color:transparent}
}

/* ============================================================
   简约化改造（追加于末尾以稳定覆盖）
   核心思路：细宋体标题治"糊"；去线去框治"碎"；大留白出"大气"
   ============================================================ */

/* 1) 标题一律 Medium 500——自带思源宋体的真字重，不是合成粗体（不再会发糊） */
h1, h2, h3, .section-title, .brand,
.entry-item h3, .biz-card .bc-n, .series-copy h2,
.band-dark h2, .cta-quiet h2, .hero h1, .page-head h1,
.home-hero h1, .home-hero-copy h1{
  font-weight:500;
}
.brand{letter-spacing:3px}
.section-title{font-size:28px;letter-spacing:3px;line-height:1.7}
.sec-head{margin-bottom:40px}
h2{letter-spacing:2px;line-height:1.6}
h3{letter-spacing:1px;font-weight:400}
.band-dark h2{color:#fff}
.cta-quiet h2{color:var(--text)}
.page-head h1{letter-spacing:2px;line-height:1.5}

/* 2) 首屏 hero：只留一句话，字更舒展 */
.home-hero-copy h1{letter-spacing:5px;line-height:1.45;margin:0 0 26px}
.home-hero-copy .lead{font-size:17px;max-width:560px;line-height:2}

/* 3) 展厅式留白：区块之间只用空间分隔 */
.section{padding:104px 0}
.section + .section{padding-top:0}

/* 4) 深色带与 CTA：同样去装饰 */
.band-dark{border:none}
.cta-quiet h2{letter-spacing:3px}

/* 5) 身份入口列表：线更淡、悬停更轻 */
.entry-item{border-bottom:1px solid var(--line)}
.entry-item h3{font-size:20px}

/* 6) 案例轮播标题更细 */
.cs-slide figcaption b{font-weight:400;letter-spacing:2px}

/* ============================================================
   精装修 v3：深色收尾 + 眉标体系 + 卡片物料感
   节奏：首屏(深) → 内容(浅) → 收尾CTA(深)，一头一尾压得住
   ============================================================ */

/* 1) 区块眉标：标题上方的小字排版层，出"被设计过"的精致感 */
.kicker{
  font-size:11px;letter-spacing:4px;color:var(--muted);
  text-transform:uppercase;margin-bottom:14px;
}
.kicker-gold{color:var(--gold)}
.sec-tw{min-width:0}

/* 2) CTA 深色收尾（全站统一）：墨绿黑压轴，黄铜按钮在深底上正好 */
.cta-quiet{
  background:#262B27;
  border-top:1px solid rgba(255,255,255,.05);
  padding:120px 24px;
}
.cta-quiet .kicker{margin-bottom:20px}
.cta-quiet h2{color:#fff;letter-spacing:3px}
.cta-quiet p{color:rgba(255,255,255,.62)}
.cta-quiet .btn-ghost{color:#fff;border-color:rgba(255,255,255,.45)}
.cta-quiet .btn-ghost:hover{background:rgba(255,255,255,.08);opacity:1}

/* 3) 业务四卡：编号眉标 + 悬停微动，治"平" */
.bc-idx{
  font-family:"DIN Alternate","Inter","Helvetica Neue",Arial,sans-serif;
  font-size:12px;letter-spacing:2px;color:var(--muted);margin-bottom:20px;
}
.biz-card .bc-n{transition:color .18s ease}
.biz-card:hover .bc-n{color:var(--accent)}
.biz-card .go{display:inline-block;transition:transform .18s ease}
.biz-card:hover .go{transform:translateX(6px)}

/* 4) 五色卡：色票化——大色块通栏到边 + 色号小字，去模板感 */
.ori-card{padding:0;transition:box-shadow .2s ease,transform .2s ease}
.ori-card:hover{box-shadow:0 12px 32px rgba(0,0,0,.09);transform:translateY(-2px)}
.ori-chip{height:112px;border-radius:0;border:none;margin:0 0 16px}
.ori-card .ori-name{
  font-family:"ChutuSerif","Source Han Serif SC","Noto Serif SC","Songti SC","STSong","SimSun",serif;
  font-size:19px;letter-spacing:2px;padding:0 18px;
}
.ori-card .ori-hex{
  display:block;font-family:"DIN Alternate","Inter","Helvetica Neue",Arial,sans-serif;
  font-size:11px;letter-spacing:1.5px;color:var(--muted);
  padding:0 18px;margin:3px 0 10px;
}
.ori-card .ori-mn{padding:0 18px;min-height:38px}
.ori-card .ori-more{padding:0 18px;margin-top:10px}
@media (max-width:600px){.ori-chip{height:84px}}

/* 5) 首屏标题再撑一档：字号大一点、字距收一点，更有力 */
.home-hero-copy h1{font-size:clamp(32px,4.8vw,58px);letter-spacing:4px}

/* 6) 眉标在手机端收紧 */
@media (max-width:600px){
  .kicker{letter-spacing:3px;margin-bottom:10px}
  .cta-quiet{padding:88px 24px}
}

/* ============================================================
   v4 精修：图文化 / 墨绿进场 / 首屏可读性 / 滚动揭示 / 标志性大字屏
   ============================================================ */

/* A) 业务四卡：图 + 文，卡片内不再有大片空白 */
.biz-card{display:block;padding:0;overflow:hidden;background:var(--surface)}
.biz-card:hover{background:#fff}
.bc-shot{display:block;overflow:hidden;background:#E7E3DB}
.bc-shot img{
  display:block;width:100%;height:168px;object-fit:cover;
  transition:transform .6s cubic-bezier(.22,.61,.36,1);
}
.biz-card:hover .bc-shot img{transform:scale(1.055)}
.bc-body{display:block;padding:24px 24px 26px}
.bc-desc{display:block;font-size:13px;color:var(--muted);line-height:1.85;margin-top:10px}
.biz-card .go{margin-top:16px}
@media (max-width:1000px){.bc-shot img{height:140px}}
@media (max-width:600px){.bc-shot img{height:190px}}

/* B) 墨绿进场：眉标、编号、悬停、分隔线都用品牌墨绿，建立色彩记忆 */
.kicker{color:var(--accent);font-weight:600}
.bc-idx{color:var(--accent);font-weight:600}
.sec-tw{border-left:2px solid var(--accent);padding-left:16px}
.entry-item .idx{color:var(--accent);font-weight:600}
.ori-card:hover .ori-name{color:var(--accent)}
.ori-card .ori-more{color:var(--accent)}
.ori-card:hover{outline:1px solid var(--accent);outline-offset:-1px}
.footer a:hover{color:var(--accent)}
@media (max-width:600px){.sec-tw{border-left-width:2px;padding-left:12px}}

/* C) 首屏顶到页面最上方：让透明顶栏真正压在暗部图上（否则露出的是浅色页面底） */
.home-hero{margin-top:-68px}
.home-hero::before{
  content:"";position:absolute;left:0;right:0;top:0;height:220px;z-index:1;
  background:linear-gradient(180deg,rgba(16,14,12,.72) 0%,rgba(16,14,12,.42) 40%,rgba(16,14,12,0) 100%);
  pointer-events:none;
}
.home-hero::after{z-index:1}
.home-hero-copy{padding:112px 0 104px}
.page-home .site-header .nav a{color:rgba(255,255,255,.94)}
@media (max-width:600px){.home-hero-copy{padding:92px 0 84px}}

/* D) 滚动揭示：内容随滚动缓缓浮现（无 JS 时自动不启用） */
html.js .reveal{
  opacity:0;transform:translateY(18px);
  transition:opacity .8s cubic-bezier(.22,.61,.36,1),transform .8s cubic-bezier(.22,.61,.36,1);
}
html.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html.js .reveal{opacity:1;transform:none;transition:none}
}

/* E-2) 内页页头改深色锚点：与首页 hero / 大字屏 / CTA 形成全站统一的深-浅-深节奏 */
.page-head{
  background:#2A332C;border-bottom:none;padding:84px 0 72px;
}
.page-head .eyebrow{color:var(--gold);letter-spacing:5px;font-size:12px}
.page-head h1{color:#fff;font-weight:500;letter-spacing:2px}
.page-head .lead{color:rgba(255,255,255,.7)}
.page-head .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.page-head .btn-ghost:hover{background:rgba(255,255,255,.1);opacity:1}
@media (max-width:600px){.page-head{padding:58px 0 50px}}

/* F) 无障碍与细节：键盘焦点、文字选中态 */
a:focus-visible,button:focus-visible,input:focus-visible,
textarea:focus-visible,select:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--accent);outline-offset:3px;border-radius:2px;
}
.band-dark a:focus-visible,.cta-quiet a:focus-visible,.sig a:focus-visible,
.page-head a:focus-visible{outline-color:var(--gold)}
::selection{background:var(--accent);color:#fff}

/* G) 打印：去掉导航/按钮/深色块反白，保证打印可读 */
@media print{
  .site-header,.menu-btn,.hero-actions,.cs-nav,.cta-quiet,.site-footer,.sig{display:none!important}
  .home-hero{min-height:auto;background:none!important}
  .home-hero::before,.home-hero::after{display:none}
  .home-hero-copy{padding:0!important}
  .home-hero-copy h1,.page-head h1,.page-head .lead{color:#000!important}
  .page-head{background:none!important;padding:0 0 16px!important}
  .reveal{opacity:1!important;transform:none!important}
  a::after{content:"";}
}

/* E) 标志性大字屏：全页唯一一次"敢放大"，做记忆点 */
.sig{
  background:var(--accent);color:#fff;padding:120px 24px;text-align:center;
  border-top:1px solid rgba(255,255,255,.06);
}
.sig .sig-k{
  font-size:11px;letter-spacing:5px;color:var(--gold);text-transform:uppercase;
  margin-bottom:26px;
}
.sig h2{
  font-family:"ChutuSerif","Source Han Serif SC","Noto Serif SC","Songti SC","STSong","SimSun",serif;
  font-size:clamp(26px,4.6vw,52px);font-weight:500;line-height:1.62;letter-spacing:5px;
  margin:0 auto 22px;max-width:900px;color:#fff;
}
.sig p{color:rgba(255,255,255,.66);font-size:14px;margin:0;letter-spacing:1px}
@media (max-width:600px){
  .sig{padding:80px 22px}
  .sig h2{letter-spacing:3px}
}

/* ============================================================
   v6 收尾：跳转链接 / 语义地标 / 打印微调
   ============================================================ */
/* A) 跳转到主内容：平时移出屏幕，键盘 Tab 聚焦时才出现在顶部 */
.skip-link{
  position:fixed;top:-60px;left:50%;transform:translateX(-50%);
  z-index:9999;padding:12px 26px;background:var(--cta);color:#fff;
  font-size:14px;letter-spacing:2px;text-decoration:none;border-radius:0 0 2px 2px;
  transition:top .18s ease;
}
.skip-link:focus{top:0;outline:2px solid var(--gold);outline-offset:2px}
/* B) main 语义地标不影响布局 */
main{display:block}

/* ============================================================
   社交图标：品牌色底 + 白色 SVG 图形（内联，无外部请求）
   ============================================================ */
.ico{display:flex;align-items:center;justify-content:center}
.ico svg{display:block}
/* 企业微信：微信系蓝绿；抖音：黑底（图形自带青红错位）；小红书：品牌红 */
.ico-wechat{background:#2AAE67}
.ico-douyin{background:#161823}
.ico-xiaohongshu{background:#FF2442}
.ico-bili{background:#FB7299}
/* 6 个平台：3 列两行，避免 4 列留空格 */
.social-grid{grid-template-columns:repeat(3,1fr)}
.ico-shipinhao{background:none}          /* 视频号图形本身是整圆渐变 */
.ico-zhihu{background:#0084FF}
.ico-baijiahao{background:#2932E1}
@media (max-width:600px){
  .social-grid{grid-template-columns:1fr 1fr}
}
/* 页脚社交行：小图标 + 平台名；未开通的图标降为灰度 */
.social-line a,.social-line .off{display:inline-flex;align-items:center;gap:5px;margin-right:16px}
.social-line .sl-ico{display:inline-flex;width:16px;height:16px}
.social-line .sl-ico svg{width:16px;height:16px;display:block}
.social-line .off .sl-ico{opacity:.38;filter:grayscale(1)}
.social-line .off{cursor:default}
/* 二维码卡片（视频号）：卡片内嵌二维码图 */
.card-qr{display:block;width:150px;height:auto;margin:10px auto 4px;
  background:#fff;border:1px solid var(--line);border-radius:6px;padding:6px}

/* ============================================================
   二维码浮层（点“扫码关注”弹出，不再直接杵在卡片里）
   ============================================================ */
.qr-modal{
  position:fixed;inset:0;z-index:9998;background:rgba(16,20,17,.72);
  display:flex;align-items:center;justify-content:center;padding:24px;
  animation:qrFade .18s ease;
}
@keyframes qrFade{from{opacity:0}to{opacity:1}}
.qr-panel{
  background:#fff;border-radius:4px;padding:28px 28px 22px;text-align:center;
  max-width:340px;width:100%;position:relative;box-shadow:0 18px 48px rgba(0,0,0,.3);
}
.qr-panel h4{
  font-family:"ChutuSerif","Source Han Serif SC","Noto Serif SC",serif;
  font-weight:500;font-size:19px;letter-spacing:2px;color:var(--text);margin:0 0 16px;
}
.qr-panel img{
  width:230px;height:auto;display:block;margin:0 auto 14px;
  border:1px solid var(--line);border-radius:4px;padding:6px;background:#fff;
}
.qr-panel p{margin:0;font-size:13px;color:var(--muted)}
.qr-close{
  position:absolute;top:8px;right:12px;width:34px;height:34px;line-height:1;
  background:none;border:none;font-size:26px;color:#8A857D;cursor:pointer;
}
.qr-close:hover,.qr-close:focus{color:var(--text)}
.qr-close:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:600px){
  .qr-panel{padding:24px 20px 18px}
  .qr-panel img{width:200px}
}
@media (prefers-reduced-motion:reduce){
  .qr-modal{animation:none}
}
/* 资质分组标题：品牌名宋体 + 说明小字 */
.q-group{
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  margin:34px 0 16px;font-weight:500;
}
.q-group:first-of-type{margin-top:6px}
.q-group span{font-family:"Microsoft YaHei",sans-serif;font-weight:400;font-size:13px;color:var(--muted)}
/* 锚点跳转时给顶栏留位，避免标题被固定导航遮住 */
[id]{scroll-margin-top:84px}