:root {
    --bg: #0b0b0d;
    --bg-soft: #131316;
    --bg-card: #17171a;
    --line: #2a2a2e;
    --text: #f2efe9;
    --text-dim: #9a978f;
    --text-faint: #6b6962;
    --accent: #a8825a;
    --accent-soft: rgba(168, 130, 90, 0.12);
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }
  .wrap { max-width: 1200px; margin: 0 auto; padding: 0 48px; }

  /* ---------- 顶部导航 ---------- */
  header {
    position: sticky; top: 0; z-index: 10;
    background: rgba(11,11,13,0.88);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
  }
  .nav {
    display: flex; align-items: center; justify-content: space-between;
    height: 72px;
  }
  .logo { display: flex; align-items: baseline; gap: 10px; }
  .logo .mark { font-size: 20px; font-weight: 700; letter-spacing: 2px; }
  .logo .mark span { color: var(--accent); }
  .logo .sub { font-size: 12px; color: var(--text-faint); letter-spacing: 1px; }
  nav ul { display: flex; gap: 36px; list-style: none; }
  nav a { font-size: 14px; color: var(--text-dim); transition: color .2s; }
  nav a:hover, nav a.on { color: var(--text); }
  .nav-cta {
    border: 1px solid var(--accent); color: var(--accent);
    padding: 9px 22px; font-size: 14px; border-radius: 2px;
    transition: all .2s;
  }
  .nav-cta:hover { background: var(--accent); color: #0b0b0d; }

  /* ---------- Hero（首页） ---------- */
  .hero {
    position: relative; overflow: hidden;
    padding: 170px 0 160px;
    border-bottom: 1px solid var(--line);
  }
  .hero::before {
    content: ""; position: absolute; top: -260px; left: 50%;
    transform: translateX(-50%);
    width: 900px; height: 620px;
    background: radial-gradient(ellipse at center,
      rgba(168,130,90,0.20) 0%,
      rgba(168,130,90,0.06) 42%,
      transparent 70%);
    pointer-events: none;
  }
  .hero::after {
    content: ""; position: absolute; bottom: -180px; right: -120px;
    width: 560px; height: 480px;
    background: radial-gradient(ellipse at center,
      rgba(168,130,90,0.08) 0%, transparent 65%);
    pointer-events: none;
  }
  .hero-bg {
    position: absolute; inset: 0; width: 100%; height: 100%;
    object-fit: cover; object-position: center; opacity: .5;
  }
  .hero-shade {
    position: absolute; inset: 0;
    background: linear-gradient(90deg,
      rgba(11,11,13,.94) 0%,
      rgba(11,11,13,.72) 48%,
      rgba(11,11,13,.30) 100%);
  }
  .hero-inner { position: relative; z-index: 2; }
  .kicker {
    font-size: 13px; letter-spacing: 4px; color: var(--accent);
    margin-bottom: 26px;
  }
  h1 {
    font-size: 56px; font-weight: 700; line-height: 1.25;
    letter-spacing: 1px; max-width: 760px;
  }
  h1 em { font-style: normal; color: var(--accent); }
  .hero p.lead {
    margin-top: 28px; font-size: 18px; color: var(--text-dim);
    max-width: 620px;
  }
  .hero-actions { margin-top: 46px; display: flex; gap: 18px; }
  .btn-primary {
    background: var(--accent); color: #0b0b0d;
    padding: 14px 34px; font-size: 15px; font-weight: 600; border-radius: 2px;
    display: inline-block;
  }
  .btn-ghost {
    border: 1px solid var(--line); color: var(--text);
    padding: 14px 34px; font-size: 15px; border-radius: 2px;
    transition: border-color .2s; display: inline-block;
  }
  .btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
  .hero-meta {
    margin-top: 70px; display: flex; gap: 64px;
    font-size: 13px; color: var(--text-faint);
  }
  .hero-meta b { display: block; font-size: 26px; font-weight: 600; color: var(--text); letter-spacing: 1px; }
  .hero-meta b i { font-style: normal; color: var(--accent); font-size: 16px; }

  /* ---------- 子页页眉 page-hero ---------- */
  .page-hero {
    padding: 150px 0 64px;
    border-bottom: 1px solid var(--line);
    position: relative; overflow: hidden;
  }
  .page-hero::before {
    content: ""; position: absolute; top: -200px; left: -120px;
    width: 620px; height: 460px;
    background: radial-gradient(ellipse at center,
      rgba(168,130,90,0.14) 0%, transparent 62%);
    pointer-events: none;
  }
  .page-hero .no { font-size: 12px; letter-spacing: 4px; color: var(--accent); display: block; margin-bottom: 18px; position: relative; }
  .page-hero h1 { position: relative; font-size: 46px; }
  .page-hero p { position: relative; margin-top: 20px; font-size: 17px; color: var(--text-dim); max-width: 640px; }

  /* ---------- 通用段头 ---------- */
  section { padding: 130px 0; }
  .sec-head { margin-bottom: 60px; }
  .sec-head .no { font-size: 12px; letter-spacing: 4px; color: var(--accent); display: block; margin-bottom: 14px; }
  .sec-head h2 { font-size: 34px; font-weight: 700; letter-spacing: 1px; }
  .sec-head p { margin-top: 14px; color: var(--text-dim); max-width: 560px; }
  .sec-head .lead2 { margin-top: 16px; color: var(--text-dim); max-width: 640px; font-size: 16px; }

  /* ---------- 服务 ---------- */
  .services { border-bottom: 1px solid var(--line); }
  .svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .svc {
    background: var(--bg-soft); padding: 44px 38px;
  }
  .svc .icon { width: 36px; height: 36px; color: var(--accent); }
  .svc .icon svg { width: 100%; height: 100%; display: block; }
  .svc .num { font-size: 13px; color: var(--accent); letter-spacing: 2px; }
  .svc h3 { margin-top: 18px; font-size: 21px; font-weight: 600; }
  .svc p { margin-top: 14px; font-size: 14px; color: var(--text-dim); }
  .svc .tags { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 8px; }
  .svc .tags span {
    font-size: 12px; color: var(--text-faint);
    border: 1px solid var(--line); padding: 3px 10px; border-radius: 2px;
  }

  /* ---------- 方法论 / 差异化 ---------- */
  .method { border-bottom: 1px solid var(--line); }
  .method-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .m-card {
    border: 1px solid var(--line); border-left: 2px solid var(--accent);
    padding: 30px 34px; background: var(--bg-soft);
  }
  .m-card h3 { font-size: 18px; font-weight: 600; }
  .m-card p { margin-top: 10px; font-size: 14px; color: var(--text-dim); }

  /* ---------- 案例 ---------- */
  .works { border-bottom: 1px solid var(--line); }
  .work-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
  .work-card { border: 1px solid var(--line); background: var(--bg-soft); }
  .work-thumb {
    height: 200px; position: relative; overflow: hidden;
    background: #0e0e10;
    display: flex; align-items: flex-end;
  }
  .work-thumb img {
    position: absolute; inset: 0; width: 100%; height: 100%;
    object-fit: cover; filter: brightness(.82) saturate(.9);
  }
  .work-thumb .glow {
    position: absolute; inset: 0;
    background: linear-gradient(180deg,
      rgba(11,11,13,.12) 0%, rgba(11,11,13,0) 40%,
      rgba(11,11,13,.55) 100%);
  }
  .work-thumb .cat {
    position: relative; margin: 0 0 14px 20px;
    font-size: 12px; letter-spacing: 2px; color: var(--accent);
  }
  .work-info { padding: 22px 20px; border-top: 1px solid var(--line); }
  .work-info h3 { font-size: 16px; font-weight: 600; }
  .work-info p { margin-top: 8px; font-size: 13px; color: var(--text-faint); }
  .work-note {
    margin-top: 26px; font-size: 13px; color: var(--text-faint);
    border-top: 1px solid var(--line); padding-top: 18px;
  }

  /* ---------- 品牌 ---------- */
  .brands { border-bottom: 1px solid var(--line); }
  .brand-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .brand {
    border: 1px solid var(--line); padding: 44px 40px; background: var(--bg-soft);
    display: flex; flex-direction: column; gap: 12px;
  }
  .brand .en { font-size: 24px; font-weight: 700; letter-spacing: 2px; }
  .brand .cn { font-size: 14px; color: var(--accent); letter-spacing: 2px; }
  .brand p { font-size: 14px; color: var(--text-dim); }

  /* ---------- 关于页 数据条 ---------- */
  .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .stat { background: var(--bg-soft); padding: 38px 32px; }
  .stat b { display: block; font-size: 34px; font-weight: 700; color: var(--accent); letter-spacing: 1px; }
  .stat span { display: block; margin-top: 10px; font-size: 13px; color: var(--text-dim); }

  /* ---------- 适老化 痛点/方案卡（复用 m-card 视觉） ---------- */
  .care-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

  /* ---------- 联系 ---------- */
  .contact { text-align: left; }
  .contact-box {
    border: 1px solid var(--line); padding: 70px 64px;
    background: linear-gradient(135deg, var(--bg-soft) 0%, #15130e 100%);
    position: relative; overflow: hidden;
  }
  .contact-box::before {
    content: ""; position: absolute; top: -140px; right: -80px;
    width: 460px; height: 360px;
    background: radial-gradient(ellipse at center, rgba(168,130,90,0.14) 0%, transparent 65%);
  }
  .contact-box h2 { font-size: 30px; font-weight: 700; }
  .contact-box p { margin-top: 16px; color: var(--text-dim); max-width: 560px; }
  .contact-actions { margin-top: 36px; display: flex; gap: 18px; position: relative; }
  .contact-flex {
    margin-top: 44px; display: flex; justify-content: space-between;
    align-items: flex-end; gap: 48px; position: relative; flex-wrap: wrap;
  }
  .contact-list {
    display: grid; grid-template-columns: repeat(2, minmax(200px, 1fr));
    gap: 28px 48px; font-size: 15px; color: var(--text-dim);
  }
  .contact-list b {
    color: var(--accent); font-weight: 500; display: block; margin-bottom: 6px;
    font-size: 12px; letter-spacing: 3px;
  }
  .contact-list a:hover { color: var(--accent); }
  .qr { text-align: center; flex-shrink: 0; }
  .qr img { width: 150px; height: 150px; display: block; background: #f5f2ec; padding: 6px; }
  .qr .cap { margin-top: 12px; font-size: 11px; letter-spacing: 4px; color: var(--text-faint); }

  /* ---------- 页脚（备案悬挂位） ---------- */
  footer { border-top: 1px solid var(--line); padding: 36px 0 44px; }
  .foot { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; }
  .foot .copy { font-size: 13px; color: var(--text-faint); }
  .foot .vtext {
    writing-mode: vertical-rl; font-size: 11px; letter-spacing: 5px;
    color: var(--text-faint); height: 120px; text-align: left;
  }
  .foot .beian { font-size: 12px; color: var(--text-faint); margin-top: 10px; display: flex; flex-direction: column; gap: 6px; }
  .foot .beian a { border-bottom: 1px dotted var(--text-faint); }

  /* ---------- 响应式 ---------- */
  @media (max-width: 860px) {
    .wrap { padding: 0 22px; }
    h1 { font-size: 38px; }
    .page-hero h1 { font-size: 32px; }
    nav ul { gap: 18px; }
    nav a { font-size: 13px; }
    .nav-cta { display: none; }
    .hero { padding: 120px 0 100px; }
    section { padding: 80px 0; }
    .svc-grid, .method-grid, .work-grid, .brand-grid, .stats, .care-flow { grid-template-columns: 1fr; }
    .hero-meta { flex-wrap: wrap; gap: 32px; }
    .contact-flex { flex-direction: column; align-items: flex-start; }
  }

  /* ---------- 案例详情页 ---------- */
  .work-card { display: block; transition: border-color .2s, transform .2s; }
  .work-card:hover { border-color: var(--accent); }
  .work-thumb img { transition: transform .4s ease; }
  .work-card:hover .work-thumb img { transform: scale(1.05); }
  .work-card .more { display: block; margin-top: 14px; font-size: 13px; color: var(--accent); letter-spacing: 1px; }

  .case-hero {
    position: relative; overflow: hidden;
    padding: 168px 0 70px;
    border-bottom: 1px solid var(--line);
  }
  .case-cover {
    position: absolute; inset: 0; width: 100%; height: 100%;
    object-fit: cover; object-position: center; opacity: .42;
    filter: brightness(.7) saturate(.9);
  }
  .case-shade {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(11,11,13,.80) 0%, rgba(11,11,13,.62) 55%, rgba(11,11,13,.92) 100%);
  }
  .case-head { position: relative; z-index: 2; }
  .case-head .cat { font-size: 12px; letter-spacing: 3px; color: var(--accent); display: block; margin-bottom: 16px; }
  .case-head h1 { font-size: 44px; max-width: 820px; }
  .case-head .sub { margin-top: 18px; font-size: 17px; color: var(--text-dim); max-width: 640px; }

  .case-ov { border-bottom: 1px solid var(--line); padding: 56px 0; }
  .ov-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .ov-item { background: var(--bg-soft); padding: 24px 22px; display: flex; flex-direction: column; gap: 8px; }
  .ov-k { font-size: 11px; letter-spacing: 2px; color: var(--text-faint); }
  .ov-v { font-size: 15px; color: var(--text); font-weight: 500; }

  .case-prose { max-width: 800px; font-size: 16px; color: var(--text-dim); line-height: 1.95; }

  .case-gal { border-top: 1px solid var(--line); }
  .case-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
  .g-item { border: 1px solid var(--line); overflow: hidden; background: #0e0e10; aspect-ratio: 16/10; }
  .g-item img { width: 100%; height: 100%; object-fit: cover; }

  @media (max-width: 860px) {
    .case-head h1 { font-size: 30px; }
    .ov-grid { grid-template-columns: repeat(2, 1fr); }
    .case-gallery { grid-template-columns: 1fr; }
  }