:root{
    --paper:#F7F4EE;--paper-pure:#FCFBF7;--surface:#FFFFFF;--ink:#172741;
    --navy:#1F3A5F;--navy-2:#34527A;--gold:#A87C1A;--gold-bright:#C9961F;
    --muted:#5C6A80;--line:rgba(23,39,65,.12);--line-strong:rgba(23,39,65,.22);
    --maxw:1200px;--serif-en:'Fraunces',serif;--serif-zh:'Noto Serif SC',serif;
    --sans:'Manrope','Noto Sans SC',sans-serif;--sans-zh:'Noto Sans SC',sans-serif;
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{font-family:var(--sans);background:var(--paper);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
  html[lang="zh-CN"] body{font-family:var(--sans-zh)}
  ::selection{background:var(--gold-bright);color:#fff}
  [data-en]{display:none}
  html[lang="en"] [data-zh]{display:none}
  html[lang="en"] [data-en]{display:inline}
  html[lang="en"] [data-en].block{display:block}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px}
  .eyebrow{display:inline-flex;align-items:center;gap:12px;font-family:var(--sans);font-size:12.5px;font-weight:600;letter-spacing:2.5px;text-transform:uppercase;color:var(--gold)}
  .eyebrow::before{content:"";width:32px;height:1px;background:var(--gold)}
  .serif{font-family:var(--serif-en)}
  html[lang="zh-CN"] .serif{font-family:var(--serif-zh)}

  /* 导航 */
  header{position:fixed;top:0;left:0;right:0;z-index:100;transition:.4s}
  header.scrolled{background:rgba(247,244,238,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;justify-content:space-between;height:84px}
  .nav-logo{display:flex;align-items:center;cursor:pointer;text-decoration:none}
  .nav-logo img{height:32px;width:auto}
  .nav-menu{display:flex;gap:42px;list-style:none}
  .nav-menu a{color:var(--ink);text-decoration:none;font-size:14.5px;font-weight:500;letter-spacing:.2px;position:relative;transition:.25s;opacity:.78}
  .nav-menu a::after{content:"";position:absolute;left:0;bottom:-7px;width:0;height:1.5px;background:var(--gold);transition:.3s}
  .nav-menu a:hover{opacity:1}
  .nav-menu a:hover::after,.nav-menu a.active::after{width:100%}
  .nav-menu a.active{opacity:1}
  .nav-right{display:flex;align-items:center;gap:24px}
  .lang-toggle{display:flex;align-items:center;font-family:var(--sans);font-size:13px;font-weight:600;gap:2px}
  .lang-toggle button{background:none;border:none;color:var(--muted);cursor:pointer;padding:4px 8px;transition:.25s;font-family:inherit;font-weight:600;border-radius:4px}
  .lang-toggle button.active{color:var(--navy);background:rgba(31,58,95,.08)}
  .lang-toggle .sep{color:var(--line-strong)}
  .btn-primary{background:var(--navy);color:#fff;text-decoration:none;padding:12px 24px;font-weight:600;font-size:14px;transition:.3s;border:1px solid var(--navy);letter-spacing:.2px;cursor:pointer;display:inline-block}
  .btn-primary:hover{background:transparent;color:var(--navy)}
  .menu-btn{display:none;background:none;border:none;color:var(--ink);font-size:24px;cursor:pointer}

  /* Hero（首页） */
  .hero{padding:190px 0 110px;position:relative}
  .hero-inner{max-width:920px}
  .hero .eyebrow{margin-bottom:34px}
  .hero h1{font-weight:500;font-size:clamp(44px,6.5vw,82px);line-height:1.06;letter-spacing:-1.5px;margin-bottom:36px;color:var(--ink)}
  html[lang="zh-CN"] .hero h1{font-weight:700;line-height:1.2;letter-spacing:0}
  .hero h1 em{font-style:italic;color:var(--navy)}
  html[lang="zh-CN"] .hero h1 em{font-style:normal;color:var(--navy);position:relative}
  html[lang="zh-CN"] .hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:10px;background:rgba(201,150,31,.28);z-index:-1}
  .hero p.lead{font-size:clamp(17px,2vw,20px);color:var(--muted);max-width:60ch;line-height:1.75;margin-bottom:46px}
  .hero-cta{display:flex;gap:28px;align-items:center;flex-wrap:wrap}
  .btn-text{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:600;font-size:15px;border-bottom:1.5px solid var(--gold);padding-bottom:4px;transition:.3s}
  .btn-text:hover{gap:16px;color:var(--navy)}
  .btn-lg{padding:15px 32px;font-size:15px}
  .hero-tags{margin-top:80px;padding-top:30px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:14px 40px}
  .hero-tags span{font-size:14px;color:var(--muted);font-weight:500;display:flex;align-items:center;gap:10px}
  .hero-tags span::before{content:"";width:5px;height:5px;background:var(--gold);border-radius:50%}

  /* 数据条 */
  .stats{padding:70px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px}
  .stat .num{font-family:var(--serif-en);font-size:56px;font-weight:500;color:var(--navy);line-height:1;letter-spacing:-1px}
  .stat .num .suffix{color:var(--gold-bright);font-size:38px}
  .stat .lbl{font-size:14.5px;color:var(--muted);margin-top:14px;font-weight:500}

  /* 通用 section */
  section.block{padding:130px 0}
  .sec-head{max-width:760px;margin-bottom:74px}
  .sec-head .eyebrow{margin-bottom:24px}
  .sec-title{font-family:var(--serif-en);font-size:clamp(34px,4.5vw,54px);font-weight:500;letter-spacing:-1px;line-height:1.12;color:var(--ink)}
  html[lang="zh-CN"] .sec-title{font-family:var(--serif-zh);font-weight:700;letter-spacing:0;line-height:1.3}
  .sec-desc{font-size:18px;color:var(--muted);line-height:1.75;margin-top:22px}

  /* 服务列表（首页） */
  .svc-list{border-top:1px solid var(--line)}
  .svc-row{display:grid;grid-template-columns:84px 1.05fr 1.5fr 50px;gap:28px;align-items:center;padding:36px 16px;border-bottom:1px solid var(--line);text-decoration:none;color:inherit;transition:.4s;position:relative}
  .svc-row::before{content:"";position:absolute;left:0;top:0;bottom:0;width:0;background:var(--paper-pure);z-index:-1;transition:.4s}
  .svc-row:hover{padding-left:32px}
  .svc-row:hover::before{width:100%}
  .svc-num{font-family:var(--serif-en);font-size:24px;color:var(--gold);font-weight:500}
  .svc-meta{display:flex;flex-direction:column;gap:11px}
  .svc-meta h3{font-family:var(--serif-en);font-size:25px;font-weight:500;letter-spacing:-.3px;color:var(--ink);line-height:1.25}
  html[lang="zh-CN"] .svc-meta h3{font-family:var(--serif-zh);font-weight:700}
  .svc-tag{align-self:flex-start;font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;padding:4px 11px;border-radius:3px}
  html[lang="zh-CN"] .svc-tag{font-family:var(--sans-zh);letter-spacing:1px}
  .svc-tag.t-core{background:rgba(31,58,95,.12);color:var(--navy)}
  .svc-tag.t-sig{background:rgba(201,150,31,.16);color:var(--gold)}
  .svc-tag.t-assure{background:rgba(31,58,95,.08);color:var(--navy-2)}
  .svc-tag.t-support{background:rgba(23,39,65,.05);color:var(--muted)}
  .svc-sub{font-size:15px;color:var(--muted);line-height:1.7}
  .svc-arrow{justify-self:end;color:var(--line-strong);transition:.4s}
  .svc-row:hover .svc-arrow{color:var(--gold);transform:translateX(6px)}

  /* 方法论 */
  .method{background:var(--paper-pure)}
  .method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0 44px;margin-top:6px}
  .mcol{padding:38px 24px 38px 0;border-top:2px solid var(--ink)}
  .mletter{font-family:var(--serif-en);font-size:46px;font-weight:600;color:var(--gold);line-height:1;margin-bottom:4px}
  .mcol .mstep{font-family:var(--sans);font-size:12px;letter-spacing:1.5px;color:var(--muted);margin-bottom:20px;font-weight:600;text-transform:uppercase}
  .mcol h4{font-family:var(--serif-en);font-size:23px;font-weight:500;margin-bottom:13px;color:var(--ink)}
  html[lang="zh-CN"] .mcol h4{font-family:var(--serif-zh);font-weight:700}
  .mcol p{font-size:14.5px;color:var(--muted);line-height:1.7}
  .method-loop{margin-top:38px;display:flex;align-items:center;gap:14px;font-size:15px;color:var(--ink);padding:22px 28px;background:rgba(31,58,95,.05);border-left:2px solid var(--gold)}
  .method-loop svg{color:var(--gold);flex-shrink:0}

  /* 案例 */
  .cases{display:grid;grid-template-columns:repeat(3,1fr);gap:34px 30px}
  .case-card{text-decoration:none;color:inherit;transition:.4s;display:block}
  .case-thumb{height:210px;position:relative;overflow:hidden;display:flex;align-items:flex-end;padding:24px;margin-bottom:22px}
  .case-thumb.c1{background:linear-gradient(155deg,#24405F,#16263F)}
  .case-thumb.c2{background:linear-gradient(155deg,#34527A,#1F3A5F)}
  .case-thumb.c3{background:linear-gradient(155deg,#9A7016,#5C4309)}
  .case-thumb.c4{background:linear-gradient(155deg,#1E4A52,#16263F)}
  .case-thumb.c5{background:linear-gradient(155deg,#7E5C13,#3D2D08)}
  .case-thumb.c6{background:linear-gradient(155deg,#2C3E66,#16263F)}
  .case-thumb .ctag{position:relative;z-index:2;font-size:11.5px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:#fff;opacity:.92}
  .case-thumb::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:30px 30px}
  .case-card h4{font-family:var(--serif-en);font-size:21px;font-weight:500;margin-bottom:9px;line-height:1.3;transition:.3s}
  html[lang="zh-CN"] .case-card h4{font-family:var(--serif-zh);font-weight:700}
  .case-card:hover h4{color:var(--navy)}
  .case-card p{font-size:14.5px;color:var(--muted);margin-bottom:18px;line-height:1.6}
  .case-metric{display:flex;align-items:baseline;gap:10px;padding-top:16px;border-top:1px solid var(--line)}
  .case-metric .cm-num{font-family:var(--serif-en);font-size:28px;font-weight:500;color:var(--gold-bright)}
  .case-metric .cm-lbl{font-size:13.5px;color:var(--muted)}

  /* CTA */
  .cta-band{background:var(--navy);color:#fff;padding:90px 64px;text-align:center;position:relative;overflow:hidden}
  .cta-band::after{content:"";position:absolute;left:0;right:0;bottom:0;height:4px;background:linear-gradient(90deg,var(--gold-bright),transparent)}
  .cta-band .eyebrow{color:var(--gold-bright);margin-bottom:26px}
  .cta-band .eyebrow::before{background:var(--gold-bright)}
  .cta-band h2{font-family:var(--serif-en);font-size:clamp(32px,4.5vw,50px);font-weight:500;margin-bottom:22px;letter-spacing:-.5px}
  html[lang="zh-CN"] .cta-band h2{font-family:var(--serif-zh);font-weight:700}
  .cta-band p{font-size:18px;color:rgba(255,255,255,.72);max-width:52ch;margin:0 auto 40px;line-height:1.7}
  .cta-band .btn-primary{background:var(--gold-bright);border-color:var(--gold-bright);color:var(--ink)}
  .cta-band .btn-primary:hover{background:#fff;border-color:#fff;color:var(--navy)}

  /* Footer */
  footer{background:var(--ink);color:rgba(255,255,255,.7);padding:80px 0 40px}
  .foot-grid{display:grid;grid-template-columns:1.8fr 1fr 1fr 1.1fr;gap:48px;margin-bottom:56px}
  .foot-logo img{height:30px;margin-bottom:22px;filter:brightness(0) invert(1);opacity:.92}
  .foot-brand p{font-size:15px;color:rgba(255,255,255,.55);max-width:36ch;line-height:1.7}
  .foot-social{display:flex;align-items:center;gap:26px;margin-top:30px;flex-wrap:wrap}
  .social-link{width:42px;height:42px;border:1px solid rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.7);border-radius:6px;transition:.3s}
  .social-link:hover{border-color:var(--gold-bright);color:var(--gold-bright)}
  .wechat-qr{display:flex;align-items:center;gap:14px}
  .qr-box{width:64px;height:64px;border:1px dashed rgba(255,255,255,.28);display:flex;align-items:center;justify-content:center;text-align:center;font-size:9.5px;color:rgba(255,255,255,.4);line-height:1.4;border-radius:4px}
  .wechat-qr span{font-size:13px;color:rgba(255,255,255,.6)}
  .foot-col h5{font-size:12px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:rgba(255,255,255,.9);margin-bottom:22px;font-family:var(--sans)}
  .foot-col a{display:block;color:rgba(255,255,255,.6);text-decoration:none;font-size:15px;margin-bottom:13px;transition:.2s}
  .foot-col a:hover{color:var(--gold-bright)}
  .foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:32px;display:flex;justify-content:space-between;align-items:center;font-size:13.5px;color:rgba(255,255,255,.45);flex-wrap:wrap;gap:12px}

  /* 滚动入场 */
  .reveal{opacity:0;transform:translateY(24px);transition:.9s cubic-bezier(.2,.7,.2,1)}
  .reveal.in{opacity:1;transform:none}

  /* ===== 内页：页面横幅 ===== */
  .page-hero{padding:172px 0 70px;border-bottom:1px solid var(--line)}
  .page-hero .eyebrow{margin-bottom:24px}
  .page-hero h1{font-family:var(--serif-en);font-size:clamp(40px,5.5vw,68px);font-weight:500;letter-spacing:-1px;line-height:1.1;color:var(--ink)}
  html[lang="zh-CN"] .page-hero h1{font-family:var(--serif-zh);font-weight:700;letter-spacing:0}
  .page-hero p{font-size:19px;color:var(--muted);max-width:62ch;margin-top:24px;line-height:1.7}

  /* ===== 服务详情 ===== */
  .svc-detail{padding:78px 0;border-bottom:1px solid var(--line)}
  .svc-detail-grid{display:grid;grid-template-columns:.9fr 1.25fr;gap:64px;align-items:start}
  .sd-num{font-family:var(--serif-en);font-size:20px;color:var(--gold);font-weight:500;margin-bottom:16px}
  .svc-detail h2{font-family:var(--serif-en);font-size:clamp(28px,3.6vw,40px);font-weight:500;color:var(--ink);margin-bottom:14px;letter-spacing:-.5px;line-height:1.15}
  html[lang="zh-CN"] .svc-detail h2{font-family:var(--serif-zh);font-weight:700}
  .sd-tag{display:inline-block;font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;padding:4px 11px;border-radius:3px;margin-bottom:22px}
  html[lang="zh-CN"] .sd-tag{font-family:var(--sans-zh);letter-spacing:1px}
  .sd-desc{font-size:16.5px;color:var(--muted);line-height:1.8}
  .cap-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .cap-card{background:var(--paper-pure);border:1px solid var(--line);padding:24px;transition:.3s}
  .cap-card:hover{border-color:var(--gold);transform:translateY(-3px)}
  .cap-name{font-family:var(--serif-en);font-size:18px;color:var(--ink);margin-bottom:8px;line-height:1.3}
  html[lang="zh-CN"] .cap-name{font-family:var(--serif-zh);font-weight:700}
  .cap-desc{font-size:13.5px;color:var(--muted);line-height:1.6}

  /* ===== 关于 ===== */
  .about-intro{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:start}
  .about-lead{font-family:var(--serif-en);font-size:clamp(22px,2.6vw,30px);line-height:1.5;color:var(--ink);font-weight:500}
  html[lang="zh-CN"] .about-lead{font-family:var(--serif-zh);font-weight:700;line-height:1.55}
  .about-body p{font-size:16px;color:var(--muted);line-height:1.8;margin-bottom:18px}
  .values{display:grid;grid-template-columns:repeat(3,1fr);gap:44px}
  .value-item{border-top:2px solid var(--ink);padding-top:26px}
  .value-item .vnum{font-family:var(--serif-en);color:var(--gold);font-size:16px;margin-bottom:18px;font-weight:600}
  .value-item h3{font-family:var(--serif-en);font-size:23px;margin-bottom:12px;color:var(--ink);font-weight:500}
  html[lang="zh-CN"] .value-item h3{font-family:var(--serif-zh);font-weight:700}
  .value-item p{font-size:14.5px;color:var(--muted);line-height:1.7}
  .offices{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
  .office-card{padding:34px;background:var(--paper-pure);border:1px solid var(--line);transition:.3s}
  .office-card:hover{border-color:var(--gold)}
  .office-card .ocity{font-family:var(--serif-en);font-size:24px;color:var(--ink);margin-bottom:10px}
  html[lang="zh-CN"] .office-card .ocity{font-family:var(--serif-zh);font-weight:700}
  .office-card .orole{font-size:12.5px;letter-spacing:1.5px;text-transform:uppercase;color:var(--gold);font-weight:600;margin-bottom:16px}
  .office-card p{font-size:14px;color:var(--muted);line-height:1.7}

  /* ===== 联系 ===== */
  .contact-grid{display:grid;grid-template-columns:.95fr 1.25fr;gap:70px;align-items:start}
  .contact-info h2{font-family:var(--serif-en);font-size:26px;font-weight:500;margin-bottom:26px;color:var(--ink)}
  html[lang="zh-CN"] .contact-info h2{font-family:var(--serif-zh);font-weight:700}
  .ci-item{margin-bottom:26px}
  .ci-item .ci-label{font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:var(--gold);font-weight:700;margin-bottom:8px}
  .ci-item a,.ci-item p{font-size:16px;color:var(--ink);text-decoration:none;line-height:1.6}
  .ci-item a:hover{color:var(--navy)}
  .contact-qr{display:flex;align-items:center;gap:16px;margin-top:34px;padding-top:30px;border-top:1px solid var(--line)}
  .contact-qr .qr-box-light{width:88px;height:88px;border:1px dashed var(--line-strong);display:flex;align-items:center;justify-content:center;text-align:center;font-size:11px;color:var(--muted);line-height:1.5;border-radius:4px;flex-shrink:0}
  .contact-form{background:var(--surface);border:1px solid var(--line);padding:44px}
  .form-field{margin-bottom:22px}
  .form-field label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:8px;letter-spacing:.3px}
  .form-field label .req{color:var(--gold-bright)}
  .form-field input,.form-field select,.form-field textarea{width:100%;padding:13px 15px;border:1px solid var(--line-strong);background:var(--paper-pure);font-family:var(--sans);font-size:15px;color:var(--ink);transition:.25s;border-radius:0}
  html[lang="zh-CN"] .form-field input,html[lang="zh-CN"] .form-field select,html[lang="zh-CN"] .form-field textarea{font-family:var(--sans-zh)}
  .form-field input:focus,.form-field select:focus,.form-field textarea:focus{outline:none;border-color:var(--navy);background:var(--surface)}
  .form-field textarea{resize:vertical;min-height:130px}
  .form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
  .form-note{font-size:13px;color:var(--muted);margin-top:6px}
  .form-success{display:none;padding:18px 22px;background:rgba(31,58,95,.06);border-left:2px solid var(--gold);font-size:15px;color:var(--ink);margin-bottom:24px;line-height:1.6}
  .form-success.show{display:block}

  @media(max-width:980px){
    .method-grid{grid-template-columns:1fr 1fr;gap:0 30px}
    .cases{grid-template-columns:1fr 1fr}
    .stats-grid{grid-template-columns:1fr 1fr;gap:48px 40px}
    .foot-grid{grid-template-columns:1fr 1fr}
    .svc-detail-grid,.about-intro,.contact-grid{grid-template-columns:1fr;gap:36px}
    .values,.offices{grid-template-columns:1fr 1fr;gap:32px}
  }
  @media(max-width:680px){
    .wrap{padding:0 24px}
    .nav-menu{display:none}.menu-btn{display:block}.nav-right .btn-primary{display:none}
    .hero{padding:140px 0 80px}
    section.block{padding:90px 0}
    .svc-row{grid-template-columns:48px 1fr;gap:14px;padding:26px 0}
    .svc-sub,.svc-arrow{display:none}
    .cases,.method-grid,.values,.offices,.cap-grid,.form-row{grid-template-columns:1fr}
    .cta-band{padding:60px 28px}
    .page-hero{padding:130px 0 56px}
    .contact-form{padding:28px 22px}
  }