/* ============================================================
   南京才大工程有限公司 — 站点样式
   纯静态、无外部依赖（不加载任何 CDN 字体或脚本）
   ============================================================ */

:root{
  --ink:        #16222e;
  --ink-2:      #46545f;
  --ink-3:      #6d7a85;
  --line:       #e5e0d7;
  --line-soft:  #efeae2;
  --paper:      #faf8f4;
  --paper-2:    #ffffff;
  --deep:       #0f2436;
  --deep-2:     #0a1a28;
  --accent:     #b07d3f;
  --accent-2:   #8c5f28;
  --radius:     3px;
  --shadow:     0 1px 2px rgba(22,34,46,.05), 0 12px 32px -18px rgba(22,34,46,.25);
  --maxw:       1180px;
}

*,*::before,*::after{ box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{ margin:0; font-weight:600; letter-spacing:-.01em; line-height:1.28; }
p{ margin:0; }
a{ color:inherit; text-decoration:none; }
.mono{ font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace; font-size:.94em; letter-spacing:.02em; }

.container{ width:min(var(--maxw), calc(100% - 48px)); margin-inline:auto; }

/* ---------------- 顶栏 ---------------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(250,248,244,.86);
  backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{ display:flex; align-items:center; gap:40px; height:78px; }

.brand{ display:flex; align-items:center; gap:12px; margin-right:auto; min-width:0; }
.brand-mark{
  width:38px; height:38px; flex:0 0 38px;
  display:grid; place-items:center;
  background:var(--deep); color:var(--accent);
  font-family:"Songti SC","SimSun",serif;
  font-size:20px; line-height:1; border-radius:2px;
}
.brand-text{ display:flex; flex-direction:column; min-width:0; }
.brand-text strong{ font-size:15.5px; font-weight:600; letter-spacing:.01em; white-space:nowrap; }
.brand-text small{ font-size:9.5px; letter-spacing:.16em; color:var(--ink-3); white-space:nowrap; }

.nav{ display:flex; gap:30px; }
.nav a{
  font-size:14px; color:var(--ink-2);
  padding:6px 0; position:relative; white-space:nowrap;
  transition:color .18s ease;
}
.nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:1px;
  background:var(--accent); transform:scaleX(0); transform-origin:left;
  transition:transform .22s ease;
}
.nav a:hover{ color:var(--ink); }
.nav a:hover::after{ transform:scaleX(1); }

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  height:46px; padding:0 26px;
  font-size:14px; font-weight:500; letter-spacing:.03em;
  border:1px solid transparent; border-radius:13px;
  transition:background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
  white-space:nowrap;
}
.btn-sm{ height:38px; padding:0 18px; font-size:13px; border-radius:11px; }
.btn-primary{ background:var(--deep); color:#fff; }
.btn-primary:hover{ background:#17334a; transform:translateY(-1px); }
.btn-ghost{ border-color:var(--line); color:var(--ink-2); background:transparent; }
.btn-ghost:hover{ border-color:var(--ink); color:var(--ink); }
.header-inner > .btn{ background:var(--deep); color:#fff; }
.header-inner > .btn:hover{ background:#17334a; }

/* ---------------- HERO ---------------- */
.hero{
  position:relative;
  padding:88px 0 76px;
  background:
    radial-gradient(900px 420px at 82% -10%, rgba(176,125,63,.10), transparent 70%),
    linear-gradient(180deg, #fdfbf7 0%, var(--paper) 100%);
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.hero::before{
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(to right, rgba(22,34,46,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22,34,46,.045) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg, rgba(0,0,0,.55), transparent 72%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid; grid-template-columns:1.12fr .88fr; gap:72px; align-items:start;
}

.eyebrow{
  font-size:11.5px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--accent-2); font-weight:600; margin-bottom:18px;
}

.hero h1{
  font-size:clamp(32px, 4.2vw, 56px);
  line-height:1.18;
  letter-spacing:-.02em;
  margin-bottom:26px;
  text-wrap:balance;
}
.lede{
  font-size:16.5px; line-height:1.95; color:var(--ink-2);
  max-width:36em;
}
.hero-actions{ display:flex; flex-wrap:wrap; gap:14px; margin-top:38px; }

.hero-card{
  position:relative;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:30px 30px 26px;
  box-shadow:var(--shadow);
}
.hero-card::before{
  content:""; position:absolute; left:0; right:0; top:-1px; height:2px;
  background:linear-gradient(90deg, var(--accent), rgba(176,125,63,0));
}
.hero-card-head{
  display:flex; align-items:center; justify-content:space-between;
  font-size:12px; letter-spacing:.16em; color:var(--ink-3);
  padding-bottom:16px; border-bottom:1px solid var(--line-soft); margin-bottom:6px;
}
.hero-card-head .dot{ width:7px; height:7px; border-radius:50%; background:var(--accent); }

.facts{ margin:0; }
.facts > div{
  display:flex; justify-content:space-between; align-items:baseline; gap:18px;
  padding:13px 0; border-bottom:1px dashed var(--line-soft);
}
.facts > div:last-child{ border-bottom:0; padding-bottom:2px; }
.facts dt{ font-size:12.5px; color:var(--ink-3); letter-spacing:.04em; flex:0 0 auto; }
.facts dd{ margin:0; font-size:14px; color:var(--ink); text-align:right; }
.facts .wide dd{ font-size:13.5px; }

/* ---------------- 关键词条 ---------------- */
.strip{ background:var(--paper-2); border-bottom:1px solid var(--line); }
.strip-inner{
  display:flex; flex-wrap:wrap; gap:12px 30px;
  padding:17px 0; justify-content:space-between;
  font-size:12.5px; letter-spacing:.1em; color:var(--ink-3);
}
.strip-inner span{ position:relative; padding-left:14px; }
.strip-inner span::before{
  content:""; position:absolute; left:0; top:50%; width:4px; height:4px;
  background:var(--accent); transform:translateY(-50%) rotate(45deg);
}

/* ---------------- 通用 section ---------------- */
.section{ padding:92px 0; }
.section-alt{ background:var(--paper-2); border-block:1px solid var(--line); }

.section-head{ margin-bottom:52px; }
.section-head h2{
  font-size:clamp(25px, 2.7vw, 34px);
  line-height:1.34; letter-spacing:-.015em;
  max-width:22em;
}

/* ---------------- 关于我们 ---------------- */
.about-grid{ display:grid; grid-template-columns:1.35fr .65fr; gap:72px; }
.prose p{ color:var(--ink-2); font-size:15.5px; line-height:2; }
.prose p + p{ margin-top:20px; }
.prose p:first-child{ color:var(--ink); font-size:16px; }

.value-list{ list-style:none; margin:0; padding:0; }
.value-list li{
  padding:22px 0; border-top:1px solid var(--line);
}
.value-list li:last-child{ border-bottom:1px solid var(--line); }
.value-list h3{ font-size:15px; margin-bottom:6px; }
.value-list p{ font-size:13.5px; color:var(--ink-3); line-height:1.85; }

/* ---------------- 业务卡片 ---------------- */
.cards{
  display:grid; grid-template-columns:repeat(4, 1fr); gap:18px;
}
.card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px 24px 26px;
  transition:transform .22s ease, border-color .22s ease, box-shadow .22s ease, background .22s ease;
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(176,125,63,.55);
  box-shadow:var(--shadow);
  background:#fff;
}
.card-no{
  font-size:11px; letter-spacing:.2em; color:var(--accent);
  margin-bottom:16px; font-variant-numeric:tabular-nums;
}
.card h3{ font-size:16.5px; margin-bottom:10px; }
.card p{ font-size:13.5px; line-height:1.85; color:var(--ink-2); }

/* ---------------- 企业登记 ---------------- */
.profile-grid{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:start; }

.info-table{ margin:0; }
.info-table > div{
  display:grid; grid-template-columns:132px 1fr; gap:18px;
  padding:15px 0; border-top:1px solid var(--line-soft);
}
.info-table > div:first-child{ border-top:1px solid var(--line); }
.info-table > div:last-child{ border-bottom:1px solid var(--line); }
.info-table dt{ font-size:13px; color:var(--ink-3); letter-spacing:.04em; }
.info-table dd{ margin:0; font-size:14.5px; line-height:1.7; }

.scope{
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:32px 30px;
}
.scope h3{ font-size:14px; letter-spacing:.1em; color:var(--ink-3); font-weight:600; margin-bottom:18px; }
.scope-label{
  font-size:12px; letter-spacing:.12em; color:var(--accent-2);
  font-weight:600; margin-bottom:8px;
}
.scope-label + p{ font-size:13.5px; line-height:1.95; color:var(--ink-2); }
.scope p + .scope-label{ margin-top:22px; }

/* ---------------- 联系 ---------------- */
.contact{
  background:var(--deep);
  color:#fff;
  padding:88px 0 92px;
  position:relative;
  overflow:hidden;
}
.contact::before{
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(700px 320px at 78% 30%, rgba(0,0,0,.75), transparent 78%);
  pointer-events:none;
}
.contact-grid{
  position:relative;
  display:grid; grid-template-columns:1fr 1fr; gap:72px; align-items:center;
}
.contact .eyebrow{ color:var(--accent); }
.contact h2{ font-size:clamp(25px, 2.8vw, 34px); color:#fff; }
.contact-lede{ margin-top:18px; color:rgba(255,255,255,.62); font-size:15px; max-width:30em; line-height:1.95; }

.contact-card{
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.035);
  border-radius:var(--radius);
  padding:8px 30px;
}
.contact-row{
  display:grid; grid-template-columns:104px 1fr; gap:20px;
  padding:20px 0; border-bottom:1px solid rgba(255,255,255,.09);
  align-items:baseline;
}
.contact-row:last-child{ border-bottom:0; }
.contact-row .label{ font-size:12px; letter-spacing:.1em; color:rgba(255,255,255,.42); }
.contact-row .value{ font-size:14.5px; color:#fff; line-height:1.7; word-break:break-all; }
.contact-row a.value{ border-bottom:1px solid rgba(176,125,63,.5); padding-bottom:1px; transition:border-color .2s ease, color .2s ease; }
.contact-row a.value:hover{ color:var(--accent); border-color:var(--accent); }

/* ---------------- 页脚 ---------------- */
.site-footer{
  background:var(--deep-2);
  color:rgba(255,255,255,.55);
  padding:44px 0 40px;
  font-size:13px;
}
.footer-grid{
  display:grid; grid-template-columns:1.4fr 1fr auto; gap:40px; align-items:start;
}
.footer-brand{ display:flex; gap:14px; align-items:flex-start; }
.footer-brand .brand-mark{ width:34px; height:34px; flex:0 0 34px; font-size:18px; }
.footer-brand strong{ color:rgba(255,255,255,.9); font-size:14px; font-weight:600; display:block; }
.footer-brand p{ margin-top:6px; font-size:12px; color:rgba(255,255,255,.4); letter-spacing:.04em; }

.footer-links{ display:flex; flex-wrap:wrap; gap:10px 24px; }
.footer-links a{ color:rgba(255,255,255,.55); transition:color .18s ease; }
.footer-links a:hover{ color:#fff; }

.footer-legal{ text-align:right; display:flex; flex-direction:column; gap:6px; }
.footer-legal .mono{ font-size:11.5px; color:rgba(255,255,255,.35); }

/* ---------------- 隐私政策页 ---------------- */
.doc-header{ border-bottom:1px solid var(--line); background:var(--paper-2); }
.doc-wrap{ padding:64px 0 96px; }
.doc{
  max-width:820px; margin-inline:auto;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:56px 64px;
}
.doc h1{ font-size:clamp(24px, 3vw, 32px); margin-bottom:10px; }
.doc .doc-meta{ font-size:12.5px; color:var(--ink-3); letter-spacing:.04em; padding-bottom:26px; border-bottom:1px solid var(--line-soft); }
.doc h2{ font-size:16.5px; margin:36px 0 12px; }
.doc p, .doc li{ font-size:14.5px; line-height:2; color:var(--ink-2); }
.doc p + p{ margin-top:12px; }
.doc ul{ padding-left:20px; margin:10px 0 0; }
.doc li + li{ margin-top:6px; }
.doc a{ color:var(--accent-2); border-bottom:1px solid rgba(176,125,63,.35); }
.doc .back{ display:inline-block; margin-bottom:26px; font-size:13px; color:var(--ink-3); }
.doc .back:hover{ color:var(--ink); }

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .hero-grid{ gap:48px; }
  .cards{ grid-template-columns:repeat(2, 1fr); }
  .about-grid, .profile-grid, .contact-grid{ gap:44px; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .footer-legal{ grid-column:1 / -1; text-align:left; }
}

@media (max-width:860px){
  .nav{ display:none; }
  .hero{ padding:56px 0 52px; }
  .hero-grid{ grid-template-columns:1fr; gap:40px; }
  .about-grid, .profile-grid, .contact-grid{ grid-template-columns:1fr; gap:36px; }
  .section{ padding:64px 0; }
  .section-head{ margin-bottom:34px; }
  .info-table > div{ grid-template-columns:110px 1fr; gap:14px; }
  .doc{ padding:36px 24px; }
  .doc-wrap{ padding:38px 0 64px; }
}

@media (max-width:560px){
  .container{ width:calc(100% - 36px); }
  .header-inner{ height:64px; gap:12px; }
  .brand-text small{ display:none; }
  .brand-text strong{ font-size:14px; }
  .header-inner > .btn{ height:34px; padding:0 14px; font-size:12.5px; }
  .cards{ grid-template-columns:1fr; }
  .facts > div{ flex-direction:column; gap:2px; }
  .facts dd{ text-align:left; }
  .hero-card{ padding:24px 22px; }
  .contact{ padding:60px 0 64px; }
  .contact-card{ padding:4px 20px; }
  .contact-row{ grid-template-columns:1fr; gap:4px; }
  .strip-inner{ gap:8px 20px; font-size:11.5px; }
  .prose p{ font-size:14.5px; }
  .footer-grid{ grid-template-columns:1fr; gap:26px; }
}

@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; scroll-behavior:auto !important; }
}

/* ======== 新增：服务品类 / 服务流程 / 服务优势 ======== */
.category-block{
  margin-top:56px; padding-top:38px; border-top:1px solid var(--line);
}
.category-head{
  display:flex; align-items:baseline; gap:20px; flex-wrap:wrap; margin-bottom:22px;
}
.category-head h3{ font-size:13px; letter-spacing:.16em; color:var(--ink-3); font-weight:600; }
.category-head p{ font-size:13.5px; color:var(--ink-3); }

.chips{ display:flex; flex-wrap:wrap; gap:10px; }
.chip{
  border:1px solid var(--line); background:var(--paper);
  padding:9px 16px; font-size:13px; color:var(--ink-2); border-radius:2px;
  transition:border-color .2s ease, color .2s ease, background .2s ease;
}
.chip:hover{ border-color:rgba(176,125,63,.6); color:var(--ink); background:#fff; }

.steps{ display:grid; grid-template-columns:repeat(5,1fr); gap:24px; }
.step{ border-top:2px solid var(--ink); padding-top:20px; }
.step p:not(.step-no){ font-size:13.5px; color:var(--ink-2); line-height:1.85; }
.step h3{ font-size:16px; margin-bottom:8px; }
.step-no{ font-size:11px; letter-spacing:.2em; color:var(--accent); margin-bottom:14px; }

.adv{ display:grid; grid-template-columns:repeat(2,1fr); gap:30px 56px; }
.adv-item{ border-top:1px solid var(--line); padding-top:22px; }
.adv-item h3{ font-size:16.5px; margin-bottom:8px; }
.adv-item p{ font-size:14px; color:var(--ink-2); line-height:1.9; }

.info-table-narrow{ max-width:760px; }

@media (max-width:1080px){
  .steps{ grid-template-columns:repeat(3,1fr); }
}
@media (max-width:860px){
  .steps{ grid-template-columns:1fr; gap:20px; }
  .adv{ grid-template-columns:1fr; gap:24px; }
  .category-block{ margin-top:40px; padding-top:28px; }
}

/* 主营业务 6 张卡片：3 列布局 */
#business .cards{ grid-template-columns:repeat(3,1fr); }
@media (max-width:1080px){ #business .cards{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:560px){ #business .cards{ grid-template-columns:1fr; } }