/* ============================================================
   QIANHE — Design System v3
   Swiss International Style · typographic hierarchy
   ============================================================ */

:root{
  --black:#0f0f0f;
  --ink:#1a1a1a;
  --body:#4a4a4a;
  --faint:#9a9a9a;
  --line:#e5e3de;
  --line-dark:#2a2825;
  --bg:#ffffff;
  --bg-soft:#f7f6f2;
  --bg-warm:#fbf9f4;
  --gold:#b5892e;
  --gold-dark:#8f6c22;
  --max:1240px;
  --display:"Inter","Helvetica Neue",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --sans:var(--display);
  --serif:"Instrument Serif",Georgia,"Songti SC","Source Han Serif SC",serif;
  --dur:.3s;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0;}
html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth;}
body{
  font-family:var(--sans);color:var(--body);background:var(--bg);
  line-height:1.72;font-size:15.5px;
  font-weight:400;letter-spacing:-.003em;
  font-optical-sizing:auto;
}
img{max-width:100%;}
a{color:inherit;}
.wrap{max-width:var(--max);margin:0 auto;padding:0 44px;}
@media(max-width:740px){.wrap{padding:0 20px;}}

/* ---- 字重工具 ---- */
.w200{font-weight:200}.w300{font-weight:300}.w400{font-weight:400}
.w500{font-weight:500}.w600{font-weight:600}.w700{font-weight:700}
.serif{font-family:var(--serif);font-weight:400;letter-spacing:0;}

/* ---- 动效 ---- */
.rv{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease);}
.rv.in{opacity:1;transform:none;}
.rv.d1{transition-delay:.08s}.rv.d2{transition-delay:.16s}.rv.d3{transition-delay:.24s}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none;}html{scroll-behavior:auto;}}

/* ============================================================
   顶栏
   ============================================================ */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:40;
  background:rgba(255,255,255,.92);backdrop-filter:blur(14px) saturate(1.4);
  border-bottom:1px solid rgba(15,15,15,.1);
  transition:border-color var(--dur),background var(--dur);
}
.topbar.scrolled{border-bottom-color:var(--black);background:rgba(255,255,255,.97);}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:24px;}
.brand{display:flex;align-items:center;gap:13px;text-decoration:none;flex:none;}
.brand img{height:27px;width:auto;display:block;}
.brand .wordmark{font-size:15px;font-weight:400;letter-spacing:.05em;color:var(--black);line-height:1;white-space:nowrap;}
.brand .wordmark b{font-weight:800;}
.brand .wordmark::after{content:"";display:block;width:100%;height:2px;margin-top:3px;background:linear-gradient(90deg,var(--gold),rgba(181,137,46,.15));}
.brand span{font-size:13.5px;letter-spacing:.3em;color:var(--black);font-weight:600;}
.nav{display:flex;gap:30px;flex-wrap:wrap;}
.nav a{
  font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);
  text-decoration:none;transition:color .2s;white-space:nowrap;font-weight:500;
  padding-bottom:3px;position:relative;
}
.nav a:hover,.nav a.active{color:var(--black);}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;background:var(--gold);}
.lang{display:flex;border:1px solid rgba(15,15,15,.18);flex:none;}
.lang button{
  background:none;border:none;cursor:pointer;padding:7px 14px;font-size:10.5px;
  letter-spacing:.12em;color:var(--faint);font-family:var(--sans);font-weight:500;transition:.2s;
}
.lang button.on{background:var(--black);color:#fff;}
.nav a.nav-cta{color:var(--black);font-weight:700;}

/* ---- 产品下拉 ---- */
.nav-drop{position:relative;display:flex;align-items:center;}
.nav-drop > a{display:inline-flex;align-items:center;gap:5px;}
.nav-drop .caret{font-size:8px;transform:translateY(-1px);transition:transform .25s;}
.nav-drop:hover .caret{transform:translateY(-1px) rotate(180deg);}
.drop-panel{
  position:absolute;top:calc(100% + 24px);left:-26px;z-index:50;
  background:#fff;border:1px solid var(--black);padding:26px 30px 24px;
  display:grid;grid-template-columns:auto auto auto;gap:0 34px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  box-shadow:0 24px 60px -28px rgba(0,0,0,.3);
}
.nav-drop:hover .drop-panel{opacity:1;visibility:visible;transform:translateY(0);}
.drop-panel::before{content:"";position:absolute;top:-25px;left:0;right:0;height:25px;}
.dp-col{display:flex;flex-direction:column;min-width:132px;}
.dp-h{
  font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);
  font-weight:700;margin-bottom:12px;white-space:nowrap;
}
html[lang="zh-CN"] .dp-h{letter-spacing:.08em;}
.drop-panel a{
  font-size:12.5px;letter-spacing:0;text-transform:none;color:var(--ink);
  font-weight:500;padding:7px 0;white-space:nowrap;transition:color .18s;
}
.drop-panel a::after{display:none;}
.drop-panel a:hover{color:var(--gold);}
@media(max-width:1020px){.nav{display:none;}}

/* ============================================================
   首屏
   ============================================================ */
.hero{padding:150px 0 0;border-bottom:1px solid var(--black);overflow:hidden;}
.hero .meta{
  display:flex;justify-content:space-between;align-items:baseline;
  font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--faint);
  margin-bottom:52px;flex-wrap:wrap;gap:10px;font-weight:500;
}
.hero .meta b{color:var(--black);font-weight:600;}
.hero h1{
  font-weight:600;color:var(--black);
  font-size:clamp(44px,7.4vw,104px);
  line-height:.96;letter-spacing:-.045em;
  text-transform:uppercase;max-width:15ch;
}
.hero h1 .thin{font-weight:200;letter-spacing:-.03em;display:block;color:#2b2b2b;}
.hero h1 em{font-style:normal;color:var(--gold);font-weight:600;}
html[lang="zh-CN"] .hero h1{
  font-weight:600;text-transform:none;letter-spacing:-.01em;
  font-size:clamp(38px,6.2vw,86px);line-height:1.14;max-width:14ch;
}
html[lang="zh-CN"] .hero h1 .thin{font-weight:300;letter-spacing:0;}
html[lang="zh-CN"] .hero h1 em{font-weight:600;}

.hero .lede{
  margin-top:44px;max-width:700px;font-size:17.5px;line-height:1.72;
  color:var(--ink);font-weight:300;letter-spacing:0;
}
.hero .cta-row{margin-top:44px;display:flex;gap:28px;align-items:center;flex-wrap:wrap;}
.btn{
  display:inline-block;font-size:11.5px;letter-spacing:.17em;text-transform:uppercase;
  text-decoration:none;padding:17px 38px;transition:all var(--dur) var(--ease);
  font-weight:600;border:1px solid var(--black);
}
.btn-black{background:var(--black);color:#fff;}
.btn-black:hover{background:var(--gold);border-color:var(--gold);color:#fff;transform:translateY(-1px);}
.btn-line{
  color:var(--black);text-decoration:none;font-size:11.5px;letter-spacing:.17em;
  text-transform:uppercase;border-bottom:1px solid var(--black);padding:0 0 6px;
  font-weight:600;transition:color .2s,border-color .2s;
}
.btn-line:hover{color:var(--gold);border-color:var(--gold);}
.promise{
  margin-top:36px;display:flex;gap:30px;flex-wrap:wrap;
  font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--faint);font-weight:500;
}
.promise span b{color:var(--black);font-weight:600;}
.promise span i{font-style:normal;color:var(--gold);margin-right:7px;}

/* ---- KPI 条 ---- */
.kpi{
  margin-top:76px;display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--black);
}
.kpi .k{
  padding:32px 30px 34px 0;border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:10px;
}
.kpi .k:last-child{border-right:none;}
.kpi .k:not(:first-child){padding-left:30px;}
.kpi .n{
  font-size:clamp(38px,4.6vw,62px);font-weight:200;color:var(--black);
  line-height:.92;letter-spacing:-.05em;font-variant-numeric:tabular-nums;
}
html[lang="zh-CN"] .kpi .n{font-weight:300;letter-spacing:-.02em;}
.kpi .n.sm{font-size:clamp(28px,3.2vw,46px);white-space:nowrap;line-height:1.25;}
.kpi .l{
  font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);
  line-height:1.6;font-weight:500;max-width:200px;
}
html[lang="zh-CN"] .kpi .l{letter-spacing:.04em;text-transform:none;font-size:12px;}

/* ---- 门槛声明 ---- */
/* hero 需求入口 */
.brief-entry{display:flex;max-width:640px;margin-top:44px;background:var(--bg);
border:1px solid var(--line);border-radius:999px;padding:6px;transition:border-color .3s var(--ease),box-shadow .3s var(--ease);}
.brief-entry:focus-within{border-color:var(--gold);box-shadow:0 6px 24px rgba(181,137,46,.12);}
.brief-entry input{flex:1;min-width:0;border:0;background:transparent;outline:none;
padding:0 22px;font-size:15px;color:var(--black);font-family:var(--body);}
.brief-entry input::placeholder{color:#9b9b9b;}
.brief-entry button{flex:none;border:0;cursor:pointer;background:var(--black);color:#fff;
padding:15px 30px;border-radius:999px;font-size:14px;font-weight:600;letter-spacing:.02em;
font-family:var(--body);transition:background .3s var(--ease);}
.brief-entry button:hover{background:var(--gold);}
@media(max-width:640px){.brief-entry{flex-direction:column;border-radius:20px;padding:10px;}
.brief-entry input{padding:14px 14px;}.brief-entry button{border-radius:14px;}}

.gate{
  margin-top:0;padding:26px 0 30px;border-top:1px solid var(--black);
  display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:baseline;
}
.gate .gk{
  font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);
  font-weight:700;white-space:nowrap;
}
.gate .gt{font-size:13px;line-height:1.75;color:var(--body);max-width:720px;font-weight:400;}
html[lang="zh-CN"] .gate .gk{letter-spacing:.08em;}

@media(max-width:900px){
  .hero{padding:118px 0 0;}
  .kpi{grid-template-columns:1fr 1fr;margin-top:56px;}
  .kpi .k{padding:24px 20px 26px 0;border-bottom:1px solid var(--line);}
  .kpi .k:not(:first-child){padding-left:0;}
  .kpi .k:nth-child(2n){padding-left:20px;border-right:none;}
  .kpi .k:nth-child(2n+1){border-right:1px solid var(--line);}
  .kpi .k:nth-last-child(-n+2){border-bottom:none;}
  .gate{grid-template-columns:1fr;gap:10px;padding:22px 0 26px;}
  .gate .gk{white-space:normal;}
}
@media(max-width:740px){
  .hero .lede{font-size:16px;margin-top:32px;}
  .hero .cta-row{margin-top:34px;gap:20px;}
  .promise{gap:12px 20px;font-size:10px;}
  .kpi .n{font-size:34px;}
}

/* ============================================================
   章节通用
   ============================================================ */
section{padding:112px 0;border-bottom:1px solid var(--line);}
section.no-pad{padding:0;border-bottom:none;}
section#way{padding:0;border-bottom:none;}

.sec-head{display:grid;grid-template-columns:72px 1fr;gap:26px;margin-bottom:68px;}
.sec-head .no{
  font-size:11px;letter-spacing:.12em;color:var(--gold);font-weight:600;
  padding-top:14px;font-variant-numeric:tabular-nums;
}
.sec-head h2{
  font-weight:600;color:var(--black);
  font-size:clamp(29px,4.1vw,54px);line-height:1.04;letter-spacing:-.038em;
  text-transform:uppercase;max-width:22ch;
}
.sec-head h2 .thin{font-weight:200;color:#2b2b2b;}
.sec-head h2 em{font-style:normal;color:var(--gold);}
.sec-head .sub{grid-column:2;margin-top:22px;font-size:16px;line-height:1.78;color:var(--body);max-width:640px;font-weight:300;}
html[lang="zh-CN"] .sec-head h2{text-transform:none;letter-spacing:-.008em;line-height:1.24;font-weight:600;max-width:20ch;}
html[lang="zh-CN"] .sec-head h2 .thin{font-weight:300;}
html[lang="zh-CN"] .sec-head .sub{font-weight:400;}
@media(max-width:740px){
  section{padding:72px 0;}
  .sec-head{grid-template-columns:1fr;gap:10px;margin-bottom:42px;}
  .sec-head .sub{grid-column:1;}
}

.bandbtn{margin-top:52px;display:flex;gap:24px;align-items:center;flex-wrap:wrap;}

/* ============================================================
   痛点（五条，左序号 + 标题 + 描述）
   ============================================================ */
.pains{border-top:1px solid var(--black);}
.pains .p{
  display:grid;grid-template-columns:64px 1fr 1.15fr;gap:34px;align-items:baseline;
  padding:34px 0;border-bottom:1px solid var(--line);
  transition:padding-left .3s var(--ease),background .3s;
}
.pains .p:hover{padding-left:16px;background:var(--bg-soft);}
.pains .p .pn{
  font-size:11px;letter-spacing:.1em;color:var(--gold);font-weight:600;
  font-variant-numeric:tabular-nums;padding-top:4px;
}
.pains .p h4{
  font-size:clamp(19px,2vw,25px);font-weight:600;color:var(--black);
  line-height:1.24;letter-spacing:-.025em;
}
html[lang="zh-CN"] .pains .p h4{letter-spacing:-.005em;line-height:1.4;}
.pains .p p{font-size:14.5px;line-height:1.82;color:var(--body);font-weight:300;}
.pains .p p b{color:var(--ink);font-weight:600;}
html[lang="zh-CN"] .pains .p p{font-weight:400;}
@media(max-width:900px){
  .pains .p{grid-template-columns:44px 1fr;gap:14px 16px;padding:26px 0;}
  .pains .p p{grid-column:2;}
}

/* ============================================================
   「有更好的办法」条
   ============================================================ */
.wayband{
  background:var(--bg-warm);padding:76px 56px;border-top:1px solid var(--black);
  border-bottom:1px solid var(--black);margin-top:0;
}
.wayband .wk{
  font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);
  font-weight:700;display:block;margin-bottom:26px;
}
.wayband h3{
  font-size:clamp(24px,3.1vw,40px);font-weight:600;color:var(--black);
  line-height:1.12;letter-spacing:-.033em;text-transform:uppercase;max-width:26ch;
}
.wayband h3 em{font-style:normal;color:var(--gold);}
html[lang="zh-CN"] .wayband h3{text-transform:none;letter-spacing:-.01em;line-height:1.3;font-weight:600;}
.wayband p{margin-top:26px;font-size:16px;line-height:1.8;color:var(--body);max-width:720px;font-weight:300;}
html[lang="zh-CN"] .wayband p{font-weight:400;}
@media(max-width:740px){.wayband{padding:44px 24px;}section#way{padding:0;}}

/* ============================================================
   服务（两列大卡）
   ============================================================ */
.svc{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border-top:1px solid var(--black);}
.sv{
  background:var(--bg);padding:40px 38px 36px;display:flex;flex-direction:column;
  transition:transform .4s var(--ease);position:relative;
}
.sv::after{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--gold),rgba(181,137,46,0));
  transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease);
}
.sv:hover{transform:translateY(-4px);}
.sv:hover::after{transform:scaleX(1);}
.sv .svt{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.sv .sn{
  font-size:clamp(30px,3vw,40px);font-weight:200;color:var(--gold);
  line-height:1;letter-spacing:-.05em;font-variant-numeric:tabular-nums;
}
.sv .badge{
  font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;
  color:var(--black);background:var(--gold);padding:5px 11px;
}
html[lang="zh-CN"] .sv .badge{letter-spacing:.08em;}
.sv h4{
  font-size:clamp(19px,1.9vw,23px);font-weight:600;color:var(--black);
  line-height:1.26;letter-spacing:-.024em;margin-bottom:12px;
}
html[lang="zh-CN"] .sv h4{letter-spacing:-.005em;line-height:1.4;}
.sv > p{font-size:14.5px;line-height:1.78;color:var(--body);margin-bottom:22px;font-weight:300;}
html[lang="zh-CN"] .sv > p{font-weight:400;}
.sv ul{list-style:none;margin:0 0 26px;flex:1;}
.sv ul li{
  font-size:13.5px;line-height:1.72;color:var(--ink);padding-left:20px;
  position:relative;margin-bottom:11px;font-weight:400;
}
.sv ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--gold);
}
.sv .go{
  font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);
  text-decoration:none;font-weight:600;transition:color .25s;align-self:flex-start;
  border-bottom:1px solid transparent;padding-bottom:3px;
}
.sv:hover .go{color:var(--gold);border-bottom-color:var(--gold);}
@media(max-width:900px){.svc{grid-template-columns:1fr;}}
@media(max-width:520px){.sv{padding:30px 22px 28px;}}

/* ============================================================
   覆盖（采购起点 / 买家市场）
   ============================================================ */
.foot4{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--black);}
.fcol{padding:38px 40px 40px 0;border-right:1px solid var(--line);}
.fcol:last-child{border-right:none;padding-right:0;padding-left:40px;}
.fcol .fk{
  font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);
  font-weight:700;display:block;margin-bottom:14px;
}
html[lang="zh-CN"] .fcol .fk{letter-spacing:.1em;}
.fcol h4{
  font-size:clamp(22px,2.4vw,30px);font-weight:600;color:var(--black);
  letter-spacing:-.028em;margin-bottom:12px;line-height:1.15;
}
html[lang="zh-CN"] .fcol h4{letter-spacing:0;}
.fcol > p{font-size:14px;line-height:1.8;color:var(--body);max-width:420px;margin-bottom:26px;font-weight:300;}
html[lang="zh-CN"] .fcol > p{font-weight:400;}
.cities{border-top:1px solid var(--line);}
.cities a{
  display:block;padding:14px 0;border-bottom:1px solid var(--line);
  font-size:14.5px;font-weight:600;color:var(--black);text-decoration:none;
  transition:padding-left .25s var(--ease),color .2s;
}
.cities a i{
  display:block;font-style:normal;font-size:12.5px;font-weight:400;
  color:var(--faint);margin-top:3px;letter-spacing:0;
}
.cities a:hover{padding-left:10px;color:var(--gold);}
@media(max-width:820px){
  .foot4{grid-template-columns:1fr;}
  .fcol{border-right:none;border-bottom:1px solid var(--line);padding:30px 0 34px;}
  .fcol:last-child{padding-left:0;border-bottom:none;}
}

/* ============================================================
   人群三卡（引述 + 痛 + 解法）
   ============================================================ */
.who3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border-top:1px solid var(--black);border-bottom:1px solid var(--black);}
.who3 .sc{background:var(--bg);padding:38px 32px 40px;transition:background .3s;}
.who3 .sc:hover{background:var(--bg-soft);}
.who3 .k{
  font-size:11px;letter-spacing:.12em;color:var(--gold);font-weight:600;
  display:block;margin-bottom:20px;font-variant-numeric:tabular-nums;
}
.who3 h4{
  font-size:clamp(18px,1.8vw,21px);font-weight:600;color:var(--black);
  letter-spacing:-.022em;margin-bottom:16px;line-height:1.3;
}
html[lang="zh-CN"] .who3 h4{letter-spacing:0;}
.who3 .sc > p:first-of-type{
  font-family:var(--serif);font-size:18px;line-height:1.5;color:var(--ink);
  margin-bottom:26px;padding-left:16px;border-left:2px solid var(--gold);
}
html[lang="zh-CN"] .who3 .sc > p:first-of-type{
  font-family:var(--sans);font-size:15px;font-weight:500;line-height:1.7;letter-spacing:0;
}
.who3 .lbl{
  font-size:9.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);
  font-weight:700;margin-bottom:6px;
}
html[lang="zh-CN"] .who3 .lbl{letter-spacing:.1em;}
.who3 .pain-t{font-size:13.5px;line-height:1.78;color:var(--body);margin-bottom:22px;font-weight:300;}
.who3 .fix{font-size:13.5px;line-height:1.78;color:var(--ink);font-weight:400;}
html[lang="zh-CN"] .who3 .pain-t{font-weight:400;}
@media(max-width:940px){.who3{grid-template-columns:1fr;}}
@media(max-width:520px){.who3 .sc{padding:30px 22px 32px;}}

/* ============================================================
   三大类导航卡（首页）— 白底 / 渐变分隔线 / 悬停动效
   ============================================================ */
.cat3{display:grid;grid-template-columns:repeat(3,1fr);}
.cat3 .cg{
  background:transparent;padding:14px 44px 14px 0;position:relative;
  text-decoration:none;display:flex;flex-direction:column;cursor:pointer;
  transition:transform .4s var(--ease);
}
.cat3 .cg + .cg{padding-left:44px;}
.cat3 .cg + .cg::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:1px;
  background:linear-gradient(180deg,rgba(0,0,0,0),var(--line) 18%,var(--line) 82%,rgba(0,0,0,0));
}
/* 悬停：顶部金色光线从左划入 */
.cat3 .cg::after{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--gold),rgba(181,137,46,0));
  transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease);
}
.cat3 .cg:hover{transform:translateY(-4px);}
.cat3 .cg:hover::after{transform:scaleX(1);}
.cat3 .cg-n{
  font-size:clamp(30px,3vw,42px);font-weight:200;color:var(--gold);line-height:1;
  letter-spacing:-.05em;margin-bottom:18px;display:block;font-variant-numeric:tabular-nums;
  transition:letter-spacing .4s var(--ease);
}
.cat3 .cg:hover .cg-n{letter-spacing:-.02em;}
.cat3 .cg h4{
  font-size:clamp(20px,2vw,25px);font-weight:600;color:var(--black);
  letter-spacing:-.028em;line-height:1.2;margin-bottom:10px;
  transition:color .25s;
}
html[lang="zh-CN"] .cat3 .cg h4{letter-spacing:-.006em;}
.cat3 .cg-q{
  font-family:var(--serif);font-size:15px;line-height:1.45;color:var(--body);
  margin-bottom:22px;min-height:44px;
}
html[lang="zh-CN"] .cat3 .cg-q{font-family:var(--sans);font-size:13.5px;line-height:1.7;font-weight:400;}
.cat3 .cg ul{list-style:none;flex:1;border-top:1px solid var(--line);padding-top:4px;margin-bottom:20px;}
.cat3 .cg ul li{border-bottom:1px solid rgba(0,0,0,0);transition:border-color .3s;}
.cat3 .cg ul li a{
  display:flex;align-items:center;gap:0;padding:10px 0;font-size:13.5px;font-weight:500;
  color:var(--ink);text-decoration:none;
  transition:color .25s,padding-left .3s var(--ease);
}
/* 悬停时金色小箭头滑入 */
.cat3 .cg ul li a::before{
  content:"→";display:inline-block;width:0;overflow:hidden;opacity:0;
  color:var(--gold);font-weight:600;
  transition:width .3s var(--ease),opacity .25s,margin-right .3s var(--ease);
}
.cat3 .cg ul li a:hover{color:var(--gold);padding-left:2px;}
.cat3 .cg ul li a:hover::before{width:18px;opacity:1;margin-right:8px;}
.cat3 .cg ul li:hover{border-bottom-color:var(--line);}
.cat3 .cg-go{
  font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);
  font-weight:600;align-self:flex-start;text-decoration:none;
  border-bottom:1px solid var(--line);padding-bottom:3px;
  transition:color .3s,border-color .3s,letter-spacing .3s var(--ease);
}
.cat3 .cg:hover .cg-go{color:var(--gold);border-bottom-color:var(--gold);letter-spacing:.2em;}
@media(max-width:940px){
  .cat3{grid-template-columns:1fr;}
  .cat3 .cg{padding:22px 0 !important;}
  .cat3 .cg + .cg{border-top:1px solid var(--line);}
  .cat3 .cg + .cg::before{display:none;}
}
@media(max-width:520px){.cat3 .cg{padding:20px 0 !important;}.cat3 .cg-q{min-height:0;}}

/* ============================================================
   产品分类逻辑（三大类说明）
   ============================================================ */
.logic{border-top:1px solid var(--black);}
.lg-row{
  display:grid;grid-template-columns:300px 1fr;gap:56px;align-items:start;
  padding:40px 0;border-bottom:1px solid var(--line);
}
.lg-l{display:flex;align-items:baseline;gap:18px;}
.lg-n{
  font-size:11px;letter-spacing:.1em;color:var(--gold);font-weight:700;
  font-variant-numeric:tabular-nums;padding-top:6px;
}
.lg-l h3{
  font-size:clamp(22px,2.5vw,32px);font-weight:600;color:var(--black);
  letter-spacing:-.032em;line-height:1.16;text-transform:uppercase;
}
html[lang="zh-CN"] .lg-l h3{text-transform:none;letter-spacing:-.008em;}
.lg-r .lg-q{
  font-family:var(--serif);font-size:clamp(18px,1.9vw,23px);line-height:1.45;
  color:var(--black);margin-bottom:14px;
}
html[lang="zh-CN"] .lg-r .lg-q{font-family:var(--sans);font-weight:600;font-size:17px;line-height:1.55;}
.lg-r p:not(.lg-q){font-size:14.5px;line-height:1.85;color:var(--body);max-width:640px;font-weight:300;}
html[lang="zh-CN"] .lg-r p:not(.lg-q){font-weight:400;}
@media(max-width:900px){
  .lg-row{grid-template-columns:1fr;gap:18px;padding:30px 0;}
}

/* ============================================================
   产品线网格
   ============================================================ */
.group-label{
  font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);
  font-weight:700;padding:34px 0 14px;border-bottom:1px solid var(--black);
}
html[lang="zh-CN"] .group-label{letter-spacing:.08em;}
.group-label:first-of-type{padding-top:0;}
.linegrid{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;
  background:var(--line);border-bottom:1px solid var(--line);
}
.linegrid.one{grid-template-columns:1fr;}
.ln{
  background:var(--bg);padding:34px 32px 30px;text-decoration:none;
  display:flex;flex-direction:column;transition:transform .4s var(--ease);position:relative;
}
.ln::after{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--gold),rgba(181,137,46,0));
  transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease);
}
.ln:hover{transform:translateY(-4px);}
.ln:hover::after{transform:scaleX(1);}
.ln .ln-k{
  font-size:11px;letter-spacing:.1em;color:var(--gold);font-weight:700;
  font-variant-numeric:tabular-nums;margin-bottom:16px;display:block;
}
.ln h4{
  font-size:clamp(18px,1.9vw,23px);font-weight:600;color:var(--black);
  letter-spacing:-.026em;line-height:1.25;margin-bottom:12px;
}
html[lang="zh-CN"] .ln h4{letter-spacing:-.006em;line-height:1.35;}
.ln > p{font-size:13.5px;line-height:1.8;color:var(--body);flex:1;margin-bottom:20px;font-weight:300;}
html[lang="zh-CN"] .ln > p{font-weight:400;}
.ln-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px;}
.ln-tags i{
  font-style:normal;font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--faint);border:1px solid var(--line);padding:4px 9px;font-weight:600;
}
html[lang="zh-CN"] .ln-tags i{letter-spacing:.04em;}
.ln .ln-go{
  font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);
  font-weight:600;transition:color .25s;align-self:flex-start;
  border-bottom:1px solid transparent;padding-bottom:3px;
}
.ln:hover .ln-go{color:var(--gold);border-bottom-color:var(--gold);}
@media(max-width:820px){.linegrid{grid-template-columns:1fr;}}
@media(max-width:520px){.ln{padding:28px 22px 26px;}}

/* ============================================================
   流程
   ============================================================ */
.flow{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--black);border-left:1px solid var(--line);}
.step{border-right:1px solid var(--line);padding:0 26px 24px;transition:background .3s;}
.step:hover{background:var(--bg-soft);}
.step .num{
  font-size:clamp(42px,4.6vw,66px);font-weight:200;color:var(--black);
  line-height:1;padding:26px 0 28px;letter-spacing:-.055em;
  border-bottom:1px solid var(--black);margin-bottom:24px;font-variant-numeric:tabular-nums;
}
.step .num i{font-style:normal;color:var(--gold);font-weight:200;}
.step h4{
  font-size:15px;font-weight:600;color:var(--black);text-transform:uppercase;
  letter-spacing:.02em;margin-bottom:10px;line-height:1.35;
}
html[lang="zh-CN"] .step h4{text-transform:none;letter-spacing:0;font-size:15.5px;line-height:1.45;}
.step .when{
  display:block;font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gold);font-weight:700;margin-bottom:12px;
}
html[lang="zh-CN"] .step .when{letter-spacing:.06em;}
.step p{font-size:13.5px;line-height:1.78;color:var(--body);margin-bottom:14px;font-weight:300;}
html[lang="zh-CN"] .step p{font-weight:400;}
.step .out{
  font-size:12.5px;line-height:1.7;color:var(--ink);border-left:2px solid var(--gold);
  padding-left:13px;margin-bottom:6px;font-weight:400;
}
@media(max-width:940px){
  .flow{grid-template-columns:1fr 1fr;}
  .step{padding:0 20px 20px;}
  .step:nth-child(2n){border-right:none;}
}
@media(max-width:600px){
  .flow{grid-template-columns:1fr;border-left:none;}
  .step{border-right:none;border-bottom:1px solid var(--line);padding:0 0 20px;}
  .step:last-child{border-bottom:none;}
}

/* ============================================================
   差异化六条
   ============================================================ */
.diff{display:grid;grid-template-columns:repeat(2,1fr);gap:0 56px;border-top:1px solid var(--black);}
.diff .d{padding:30px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:44px 1fr;gap:16px;}
.diff .dn{
  font-size:10.5px;letter-spacing:.1em;color:var(--gold);font-weight:700;
  padding-top:5px;font-variant-numeric:tabular-nums;
}
.diff h4{
  font-size:17px;font-weight:600;color:var(--black);letter-spacing:-.02em;
  margin-bottom:8px;line-height:1.35;grid-column:2;
}
html[lang="zh-CN"] .diff h4{letter-spacing:0;line-height:1.5;}
.diff p{font-size:13.5px;line-height:1.78;color:var(--body);grid-column:2;font-weight:300;}
html[lang="zh-CN"] .diff p{font-weight:400;}
@media(max-width:820px){.diff{grid-template-columns:1fr;gap:0;}}

/* ============================================================
   对比表
   ============================================================ */
.compare{width:100%;border-top:1px solid var(--black);border-collapse:collapse;}
.compare th,.compare td{text-align:left;padding:20px 18px;border-bottom:1px solid var(--line);font-size:14px;line-height:1.6;}
.compare thead th{border-bottom:1px solid var(--black);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--faint);font-weight:700;padding-bottom:16px;}
.compare thead th.us{color:var(--black);}
.compare tbody th{font-weight:600;color:var(--black);font-size:14px;width:26%;}
.compare td.us{background:var(--bg-warm);color:var(--black);font-weight:500;}
.compare td.other{color:#8e8e8e;}
.compare td.us::before{content:"—";color:var(--gold);margin-right:10px;font-weight:700;}
.compare td.other::before{content:"—";color:#c8c8c8;margin-right:10px;}
@media(max-width:700px){
  .compare th,.compare td{padding:14px 10px;font-size:12.5px;}
  .compare tbody th{width:32%;}
  .compare thead th{font-size:9.5px;letter-spacing:.08em;}
}

/* ============================================================
   评价
   ============================================================ */
.quotes{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border-top:1px solid var(--black);}
.qt{background:var(--bg);padding:38px 34px;transition:background .3s;display:flex;flex-direction:column;}
.qt:hover{background:var(--bg-soft);}
.qt .mark{font-family:var(--serif);font-size:48px;line-height:.65;color:var(--gold);margin-bottom:20px;}
.qt p{font-size:15px;line-height:1.82;color:var(--ink);flex:1;margin-bottom:24px;font-weight:300;}
html[lang="zh-CN"] .qt p{font-weight:400;}
.qt .src{font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--faint);border-top:1px solid var(--line);padding-top:16px;font-weight:500;}
.qt .src b{display:block;color:var(--black);font-weight:600;font-size:11.5px;margin-bottom:4px;letter-spacing:.08em;}
@media(max-width:760px){.quotes{grid-template-columns:1fr;}.qt{padding:28px 22px;}}

/* ============================================================
   新即优势（黑底大字）
   ============================================================ */
.newband{background:var(--black);color:#fff;padding:104px 0;}
.newband .kick{font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--gold);font-weight:700;margin-bottom:34px;display:block;}
.newband h2{
  font-size:clamp(33px,5.2vw,70px);font-weight:600;line-height:1.02;
  letter-spacing:-.042em;text-transform:uppercase;color:#fff;max-width:16ch;
}
.newband h2 .thin{font-weight:200;display:block;color:rgba(255,255,255,.82);}
.newband h2 em{font-style:normal;color:var(--gold);}
html[lang="zh-CN"] .newband h2{text-transform:none;letter-spacing:-.012em;line-height:1.2;font-size:clamp(29px,4.4vw,58px);max-width:14ch;}
.newband .cols{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;margin-top:66px;padding-top:48px;border-top:1px solid var(--line-dark);}
.newband .cols .c .n{font-size:10.5px;letter-spacing:.16em;color:var(--gold);font-weight:700;display:block;margin-bottom:14px;}
.newband .cols .c h4{font-size:17px;font-weight:600;color:#fff;margin-bottom:10px;line-height:1.38;letter-spacing:-.015em;}
.newband .cols .c p{font-size:13.5px;line-height:1.82;color:rgba(255,255,255,.58);font-weight:300;}
html[lang="zh-CN"] .newband .cols .c p{font-weight:400;}
@media(max-width:820px){.newband{padding:68px 0;}.newband .cols{grid-template-columns:1fr;gap:32px;margin-top:44px;padding-top:36px;}}

/* ============================================================
   黑底三卡
   ============================================================ */
.assure{background:var(--black);color:#fff;padding:0;}
.assure-inner{
  max-width:var(--max);margin:0 auto;padding:88px 44px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-dark);
}
.acard{background:var(--black);padding:0 38px;transition:background .3s;}
.acard:first-child{padding-left:0;}
.acard:last-child{padding-right:0;}
.acard:hover{background:#171717;}
.acard .n{font-size:10px;letter-spacing:.18em;color:var(--gold);font-weight:700;margin-bottom:34px;display:block;}
.acard h4{
  font-size:clamp(19px,2vw,25px);font-weight:600;color:#fff;margin-bottom:14px;
  letter-spacing:-.028em;line-height:1.24;
}
html[lang="zh-CN"] .acard h4{letter-spacing:-.005em;line-height:1.35;}
.acard p{font-size:14px;line-height:1.82;color:rgba(255,255,255,.6);font-weight:300;}
html[lang="zh-CN"] .acard p{font-weight:400;}
@media(max-width:860px){
  .assure-inner{grid-template-columns:1fr;padding:52px 24px;}
  .acard{padding:30px 0;border-bottom:1px solid var(--line-dark);}
  .acard:last-child{border-bottom:none;}
  .acard .n{margin-bottom:20px;}
}

/* ============================================================
   关于
   ============================================================ */
.about{display:grid;grid-template-columns:7fr 4fr;gap:84px;}
.about .story p{font-size:16px;line-height:1.85;color:var(--ink);margin-bottom:22px;font-weight:300;}
html[lang="zh-CN"] .about .story p{font-weight:400;}
.about .story p strong{color:var(--black);font-weight:600;}
.about .story .q{
  font-family:var(--serif);font-size:clamp(20px,2.3vw,27px);line-height:1.45;
  color:var(--black);border-top:1px solid var(--black);border-bottom:1px solid var(--black);
  padding:28px 0;margin:40px 0;letter-spacing:0;
}
html[lang="zh-CN"] .about .story .q{font-family:var(--sans);font-weight:600;font-size:18px;line-height:1.65;letter-spacing:0;}
.about .story .q em{font-style:normal;color:var(--gold);}
.facts{border-top:1px solid var(--black);align-self:start;}
.fact{padding:18px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:105px 1fr;gap:18px;align-items:baseline;transition:padding-left .25s;}
.fact:hover{padding-left:10px;}
.fact dt{font-size:10px;letter-spacing:.17em;text-transform:uppercase;color:var(--faint);font-weight:600;}
html[lang="zh-CN"] .fact dt{letter-spacing:.08em;}
.fact dd{font-size:14px;color:var(--black);font-weight:500;}
@media(max-width:860px){.about{grid-template-columns:1fr;gap:44px;}}

/* ============================================================
   FAQ
   ============================================================ */
.faq{border-top:1px solid var(--black);}
.qa{
  border-bottom:1px solid var(--line);padding:24px 6px;display:grid;
  grid-template-columns:1fr 30px;gap:20px;cursor:pointer;transition:background .25s;
}
.qa:hover{background:var(--bg-soft);}
.qa h4{font-size:16px;font-weight:600;color:var(--black);line-height:1.5;letter-spacing:-.014em;}
html[lang="zh-CN"] .qa h4{letter-spacing:0;font-size:16px;}
.qa .pm{font-size:19px;color:var(--gold);font-weight:300;text-align:right;line-height:1.4;transition:transform .3s;}
.qa .ans{grid-column:1/-1;max-height:0;overflow:hidden;opacity:0;transition:max-height .45s var(--ease),opacity .35s;}
.qa.open .ans{max-height:460px;opacity:1;padding-top:8px;}
.qa .ans p{font-size:14.5px;line-height:1.85;color:var(--body);max-width:760px;font-weight:300;}
html[lang="zh-CN"] .qa .ans p{font-weight:400;}
.qa.open .pm{transform:rotate(45deg);}

.split{display:grid;grid-template-columns:7fr 3.4fr;gap:80px;}
.split .side{border-top:1px solid var(--black);align-self:start;}
.split .side .si{padding:18px 0;border-bottom:1px solid var(--line);}
.split .side .si dt{font-size:10px;letter-spacing:.17em;text-transform:uppercase;color:var(--gold);font-weight:700;margin-bottom:8px;}
html[lang="zh-CN"] .split .side .si dt{letter-spacing:.08em;}
.split .side .si dd{font-size:13.5px;color:var(--ink);line-height:1.75;font-weight:400;}
.split img{width:100%;display:block;aspect-ratio:16/10;object-fit:cover;filter:grayscale(.12);}
@media(max-width:860px){.split{grid-template-columns:1fr;gap:40px;}}

/* ============================================================
   占位标注
   ============================================================ */
.ph{
  border:1px dashed #cfc7b5;background:var(--bg-warm);padding:30px 30px;
  color:#7d7666;font-size:13.5px;line-height:1.85;font-weight:400;
}
.ph b{
  display:block;font-size:10px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--gold-dark);margin-bottom:12px;font-weight:700;
}
html[lang="zh-CN"] .ph b{letter-spacing:.1em;}

/* ============================================================
   CTA 条
   ============================================================ */
.cta-band{background:var(--bg-soft);border-top:1px solid var(--black);border-bottom:1px solid var(--black);padding:72px 0;}
.cta-band .in{display:flex;justify-content:space-between;align-items:center;gap:40px;flex-wrap:wrap;}
.cta-band h3{
  font-size:clamp(24px,3vw,38px);font-weight:600;color:var(--black);line-height:1.12;
  letter-spacing:-.033em;text-transform:uppercase;max-width:640px;
}
.cta-band h3 em{font-style:normal;color:var(--gold);}
html[lang="zh-CN"] .cta-band h3{text-transform:none;letter-spacing:-.01em;line-height:1.3;}
.cta-band .btn{flex:none;}

/* ============================================================
   联系（黑底大字）
   ============================================================ */
.contact{background:var(--black);color:#fff;padding:132px 0;border-bottom:none;}
.contact .no{font-size:10.5px;letter-spacing:.18em;color:var(--gold);font-weight:700;margin-bottom:38px;display:block;}
.contact h2{
  font-weight:600;font-size:clamp(38px,6vw,86px);line-height:.99;letter-spacing:-.045em;
  text-transform:uppercase;margin-bottom:42px;max-width:16ch;
}
.contact h2 em{font-style:normal;color:var(--gold);}
html[lang="zh-CN"] .contact h2{text-transform:none;letter-spacing:-.015em;line-height:1.16;max-width:14ch;}
.contact .note{font-size:16px;line-height:1.85;color:rgba(255,255,255,.58);max-width:580px;font-weight:300;}
.mailbtn{
  display:inline-flex;align-items:center;gap:14px;
  margin-top:50px;padding:18px 40px;
  background:var(--gold);color:var(--black);text-decoration:none;
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:all var(--dur) var(--ease);
}
.mailbtn:hover{background:#fff;transform:translateY(-2px);}
.mailbtn svg{width:17px;height:17px;flex:none;}
.contact-meta{
  margin-top:80px;padding-top:32px;border-top:1px solid var(--line-dark);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;
  font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.38);
  font-weight:500;
}
.contact-meta b{color:rgba(255,255,255,.85);font-weight:600;margin-left:12px;letter-spacing:.06em;}
@media(max-width:640px){.contact{padding:88px 0;}.contact-meta{flex-direction:column;gap:12px;}}

/* ============================================================
   内容页
   ============================================================ */
.page-hero{padding:158px 0 78px;border-bottom:1px solid var(--black);}
.page-hero .crumb{font-size:10.5px;letter-spacing:.17em;text-transform:uppercase;color:var(--faint);margin-bottom:34px;font-weight:500;}
.page-hero .crumb a{text-decoration:none;transition:color .2s;}
.page-hero .crumb a:hover{color:var(--gold);}
.page-hero h1{
  font-weight:600;color:var(--black);font-size:clamp(34px,5.4vw,76px);
  line-height:1.02;letter-spacing:-.042em;text-transform:uppercase;max-width:18ch;
}
.page-hero h1 .thin{font-weight:200;display:block;color:#2b2b2b;}
.page-hero h1 em{font-style:normal;color:var(--gold);}
html[lang="zh-CN"] .page-hero h1{text-transform:none;letter-spacing:-.012em;line-height:1.2;font-size:clamp(30px,4.6vw,64px);max-width:16ch;}
html[lang="zh-CN"] .page-hero h1 .thin{font-weight:300;}
.page-hero .sub{margin-top:34px;font-size:17.5px;line-height:1.76;color:var(--ink);max-width:660px;font-weight:300;}
html[lang="zh-CN"] .page-hero .sub{font-weight:400;}
@media(max-width:740px){.page-hero{padding:112px 0 50px;}.page-hero .sub{font-size:16px;}}

.prose{max-width:740px;}
.prose h3{
  font-size:clamp(21px,2.4vw,28px);font-weight:600;color:var(--black);
  line-height:1.28;letter-spacing:-.028em;margin:0 0 18px;
}
html[lang="zh-CN"] .prose h3{letter-spacing:-.008em;}
.prose p{font-size:16px;line-height:1.88;color:var(--ink);margin-bottom:22px;font-weight:300;}
html[lang="zh-CN"] .prose p{font-weight:400;}
.prose p strong{color:var(--black);font-weight:600;}
.prose ul{margin:0 0 26px;padding-left:0;list-style:none;}
.prose ul li{font-size:15.5px;line-height:1.85;color:var(--ink);padding-left:26px;position:relative;margin-bottom:12px;font-weight:400;}
.prose ul li::before{content:"—";position:absolute;left:0;color:var(--gold);font-weight:700;}
.prose .q{
  font-family:var(--serif);font-size:clamp(19px,2.1vw,25px);line-height:1.42;
  color:var(--black);border-top:1px solid var(--black);border-bottom:1px solid var(--black);
  padding:26px 0;margin:40px 0;
}
html[lang="zh-CN"] .prose .q{font-family:var(--sans);font-weight:600;font-size:18px;line-height:1.6;}
.prose .q em{font-style:normal;color:var(--gold);}

/* 卡片网格（内页仍用） */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border-top:1px solid var(--black);border-bottom:1px solid var(--black);}
.card{background:var(--bg);padding:38px 30px 34px;text-decoration:none;display:flex;flex-direction:column;transition:background .3s;min-height:230px;}
.card:hover{background:var(--bg-soft);}
.card .cn{font-size:11px;letter-spacing:.14em;color:var(--gold);font-weight:600;display:block;margin-bottom:22px;font-variant-numeric:tabular-nums;}
.card h4{font-size:clamp(17px,1.7vw,20px);font-weight:600;color:var(--black);line-height:1.34;letter-spacing:-.02em;margin-bottom:12px;}
.card p{font-size:13.5px;line-height:1.8;color:var(--body);flex:1;font-weight:300;}
html[lang="zh-CN"] .card p{font-weight:400;}
.card .go{margin-top:22px;font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--faint);transition:color .25s;font-weight:600;}
.card:hover .go{color:var(--gold);}
@media(max-width:900px){.cards{grid-template-columns:1fr 1fr;}}
@media(max-width:600px){.cards{grid-template-columns:1fr;}}

/* 编号行 + 展开 */
.rows{border-top:1px solid var(--black);}
.row{
  display:grid;grid-template-columns:66px 1fr auto;gap:24px;align-items:baseline;
  padding:32px 8px;border-bottom:1px solid var(--line);
  cursor:pointer;position:relative;transition:background .25s,padding .25s var(--ease);
}
.row:hover{background:var(--bg-soft);padding-left:20px;}
.row .no{font-size:12px;color:var(--faint);font-weight:600;font-variant-numeric:tabular-nums;transition:color .25s;}
.row:hover .no{color:var(--gold);}
.row h3{font-size:clamp(20px,2.4vw,30px);font-weight:600;color:var(--black);letter-spacing:-.028em;text-transform:uppercase;}
html[lang="zh-CN"] .row h3{text-transform:none;letter-spacing:-.008em;}
.row .arrow{font-size:18px;color:var(--faint);transition:transform .25s,color .25s;transform:rotate(-45deg);}
.row.open .arrow{transform:rotate(0);color:var(--gold);}
.row .detail{grid-column:2/-1;overflow:hidden;max-height:0;transition:max-height .5s var(--ease),opacity .4s;opacity:0;}
.row.open .detail{max-height:560px;opacity:1;}
.row .detail-inner{display:grid;grid-template-columns:1fr 1fr;gap:32px;padding:26px 0 10px;}
.row .detail p{font-size:14.5px;line-height:1.85;color:var(--body);font-weight:300;}
html[lang="zh-CN"] .row .detail p{font-weight:400;}
.row .detail .note{font-size:13px;color:var(--gold-dark);border-left:2px solid var(--gold);padding-left:14px;line-height:1.8;}
.row .detail img{width:100%;display:block;filter:grayscale(.15) contrast(1.02);aspect-ratio:3/2;object-fit:cover;}
.toggle-hint{font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--faint);margin-top:18px;text-align:right;font-weight:500;}
@media(max-width:820px){
  .row{grid-template-columns:46px 1fr auto;}
  .row .detail-inner{grid-template-columns:1fr;}
  .row h3{font-size:19px;}
}

/* 四宫格 */
.pain{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--black);border-left:1px solid var(--line);}
.pain .p{border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:34px 30px 38px;transition:background .3s;}
.pain .p:hover{background:var(--bg-soft);}
.pain .p .pn{font-size:11px;letter-spacing:.13em;color:var(--gold);font-weight:600;display:block;margin-bottom:20px;font-variant-numeric:tabular-nums;}
.pain .p h4{font-size:clamp(17px,1.8vw,21px);font-weight:600;color:var(--black);line-height:1.36;letter-spacing:-.022em;margin-bottom:12px;}
.pain .p p{font-size:13.5px;line-height:1.8;color:var(--body);font-weight:300;}
html[lang="zh-CN"] .pain .p p{font-weight:400;}
.pain .p p b{color:var(--ink);font-weight:600;}
@media(max-width:820px){.pain{grid-template-columns:1fr;}.pain .p{padding:28px 20px;}}

/* 受众四列（内页） */
.who{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border-top:1px solid var(--black);}
.who .w{background:var(--bg);padding:32px 26px 36px;transition:background .3s;}
.who .w:hover{background:var(--bg-soft);}
.who .w .wn{font-size:11px;letter-spacing:.13em;color:var(--gold);font-weight:600;display:block;margin-bottom:18px;font-variant-numeric:tabular-nums;}
.who .w h4{font-size:14.5px;font-weight:600;color:var(--black);text-transform:uppercase;letter-spacing:.02em;margin-bottom:10px;}
html[lang="zh-CN"] .who .w h4{text-transform:none;letter-spacing:0;}
.who .w p{font-size:13px;line-height:1.8;color:var(--body);font-weight:300;}
html[lang="zh-CN"] .who .w p{font-weight:400;}
@media(max-width:860px){.who{grid-template-columns:1fr 1fr;}}
@media(max-width:560px){.who{grid-template-columns:1fr;}}

/* 解决方案六宫格 */
.sol{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--black);border-left:1px solid var(--line);}
.sol .s{border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:34px 28px 32px;transition:background .3s;}
.sol .s:hover{background:var(--bg-soft);}
.sol .s .sn{font-size:10.5px;letter-spacing:.14em;color:var(--gold);font-weight:600;display:block;margin-bottom:16px;}
.sol .s h4{font-size:18px;font-weight:600;color:var(--black);margin-bottom:10px;line-height:1.3;letter-spacing:-.02em;}
.sol .s p{font-size:13.5px;line-height:1.8;color:var(--body);margin-bottom:16px;font-weight:300;}
html[lang="zh-CN"] .sol .s p{font-weight:400;}
.sol .s .go{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);text-decoration:none;transition:color .25s;font-weight:600;}
.sol .s:hover .go{color:var(--gold);}
@media(max-width:860px){.sol{grid-template-columns:1fr 1fr;}}
@media(max-width:560px){.sol{grid-template-columns:1fr;}}

/* ============================================================
   页脚
   ============================================================ */
footer{background:var(--black);border-top:1px solid var(--line-dark);padding:70px 0 26px;}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding-bottom:52px;border-bottom:1px solid var(--line-dark);}
.foot-brand .fbrand{display:flex;align-items:center;gap:12px;margin-bottom:20px;}
.foot-brand .fbrand img{height:24px;width:auto;display:block;opacity:.85;}
.foot-brand .wordmark{font-size:14px;font-weight:400;letter-spacing:.05em;color:#fff;line-height:1;}
.foot-brand .wordmark b{font-weight:800;}
.foot-brand .fbrand span{font-size:12.5px;letter-spacing:.28em;color:rgba(255,255,255,.7);font-weight:600;}
.foot-brand p{font-size:13px;line-height:1.8;color:rgba(255,255,255,.4);max-width:290px;font-weight:300;}
.foot-col h5{font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:rgba(255,255,255,.32);font-weight:700;margin-bottom:18px;}
.foot-col a{display:block;font-size:13px;color:rgba(255,255,255,.6);text-decoration:none;margin-bottom:11px;transition:color .2s;font-weight:400;}
.foot-col a:hover{color:var(--gold);}
.foot-bottom{
  display:flex;justify-content:space-between;align-items:center;padding-top:26px;
  font-size:10.5px;letter-spacing:.12em;color:rgba(255,255,255,.28);text-transform:uppercase;
  flex-wrap:wrap;gap:12px;font-weight:500;
}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr 1fr;gap:36px;}}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr;}.foot-bottom{flex-direction:column;text-align:center;}}

[hidden]{display:none !important;}