/* ============================================================
   九本书餐饮咨询 · V1 视觉系统
   GEO 约束：所有正文在 HTML 中，动效只用 CSS，不依赖 JS
   ============================================================ */

:root{
  /* 色板 */
  --ink:#111318;
  --ink-2:#2A2E36;
  --ink-3:#4B5058;
  --paper:#FBFAF7;
  --paper-2:#F3F1EB;
  --card:#FFFFFF;
  --accent:#A93A16;
  --accent-2:#C9552B;
  --accent-soft:#F7EAE3;
  --green:#0E6350;
  --green-soft:#E6F0EC;
  --line:#E3E0D7;
  --line-2:#CFCBBF;
  --muted:#6E727A;
  --dark:#14161B;
  --dark-2:#1E222A;

  /* 版式 */
  --max:1120px;
  --r:3px;
  --shadow-s:0 1px 2px rgba(17,19,24,.05);
  --shadow-m:0 2px 12px rgba(17,19,24,.07);
  --shadow-l:0 12px 40px rgba(17,19,24,.10);
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:400 17px/1.85 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--accent);text-decoration:none;transition:color .18s;}
a:hover{color:var(--accent-2);text-decoration:underline;text-underline-offset:3px;}
img{max-width:100%;height:auto;display:block;}
.wrap{max-width:var(--max);margin:0 auto;padding:0 30px;}
.num-t{font-variant-numeric:tabular-nums;}

/* ---------------- 顶部导航 ---------------- */
.site-head{
  background:rgba(251,250,247,.92);
  backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:50;
}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:28px;}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:.08em;color:var(--ink);}
.logo:hover{text-decoration:none;color:var(--ink);}
.logo .mark{
  width:26px;height:26px;background:var(--ink);color:#fff;border-radius:3px;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;letter-spacing:0;flex:0 0 auto;
}
.nav{display:flex;align-items:center;gap:4px;font-size:15px;}
.nav a{color:var(--ink-2);padding:8px 13px;border-radius:var(--r);}
.nav a:hover{background:var(--paper-2);color:var(--ink);text-decoration:none;}
.nav a.cta{background:var(--ink);color:#fff;margin-left:8px;padding:9px 18px;}
.nav a.cta:hover{background:var(--accent);color:#fff;}

/* ---------------- Hero ---------------- */
.hero-dark{background:var(--dark);color:#EDEAE4;padding:88px 0 0;position:relative;overflow:hidden;}
.hero-dark::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;background:rgba(255,255,255,.08);
}
.hero-dark .eyebrow{color:#8F8B82;}
.hero-dark h1{color:#fff;font-size:46px;line-height:1.3;letter-spacing:-.015em;font-weight:800;margin:0 0 24px;max-width:900px;}
.hero-dark .lede{color:#B6B2A9;font-size:19px;max-width:700px;margin:0 0 40px;line-height:1.8;}
.hero-dark a{color:#F0B396;}

.hero-plain{padding:80px 0 60px;border-bottom:1px solid var(--line);}
.hero-plain h1{font-size:40px;line-height:1.35;letter-spacing:-.015em;font-weight:800;margin:0 0 22px;max-width:880px;}
.hero-plain .lede{font-size:18.5px;color:var(--ink-2);max-width:720px;margin:0 0 0;line-height:1.8;}
.eyebrow{font-size:12.5px;letter-spacing:.18em;color:var(--muted);margin:0 0 18px;font-weight:600;}

/* 首页数字条（深色 hero 底部） */
.stat-band{
  display:grid;grid-template-columns:repeat(3,1fr);
  border-top:1px solid rgba(255,255,255,.10);
  margin-top:56px;
}
.stat-band > div{padding:32px 28px 36px;border-right:1px solid rgba(255,255,255,.08);}
.stat-band > div:last-child{border-right:0;}
.stat-band .n{font-size:38px;font-weight:800;letter-spacing:-.02em;color:#fff;line-height:1.15;font-variant-numeric:tabular-nums;}
.stat-band .n em{font-style:normal;color:var(--accent-2);}
.stat-band .n small{font-size:17px;font-weight:700;color:#CFCBC2;}
.stat-band .d{font-size:14.5px;color:#9A968D;margin-top:12px;line-height:1.65;}
.stat-band .s{font-size:12.5px;color:#6E6A62;margin-top:9px;}

/* ---------------- 区块 ---------------- */
section{padding:76px 0;border-bottom:1px solid var(--line);}
section.tight{padding:56px 0;}
section.dark{background:var(--dark);color:#EDEAE4;border-bottom:0;}
section.dark h2{color:#fff;}
section.dark p{color:#B6B2A9;}
section.dark a{color:#F0B396;}
section:last-of-type{border-bottom:0;}

h2{font-size:29px;line-height:1.42;margin:0 0 16px;font-weight:800;letter-spacing:-.012em;}
h3{font-size:19.5px;margin:38px 0 12px;font-weight:700;letter-spacing:-.005em;}
h4{font-size:16px;margin:24px 0 8px;font-weight:700;color:var(--ink-2);}
p{margin:0 0 18px;}
.lead-p{font-size:18.5px;color:var(--ink-2);max-width:760px;margin-bottom:34px;line-height:1.8;}
.muted{color:var(--muted);}
.small{font-size:14px;line-height:1.7;}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-head .eyebrow{margin-bottom:12px;}

/* ---------------- 卡片 ---------------- */
.grid{display:grid;gap:20px;}
.g2{grid-template-columns:repeat(2,1fr);}
.g3{grid-template-columns:repeat(3,1fr);}
.g4{grid-template-columns:repeat(4,1fr);}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:28px 26px;transition:box-shadow .2s,border-color .2s,transform .2s;
}
.card h3{margin-top:0;font-size:18.5px;}
.card p{font-size:15.5px;color:var(--ink-3);margin-bottom:0;line-height:1.75;}
a.card{display:block;color:inherit;}
a.card:hover{text-decoration:none;border-color:var(--line-2);box-shadow:var(--shadow-m);transform:translateY(-2px);}
a.card:hover h3{color:var(--accent);}

.tag{
  display:inline-block;font-size:12px;font-weight:600;color:var(--accent);
  background:var(--accent-soft);padding:3px 10px;border-radius:2px;margin-bottom:12px;letter-spacing:.02em;
}
.tag.green{color:var(--green);background:var(--green-soft);}
.tag.grey{color:var(--ink-3);background:var(--paper-2);}

/* 案例卡：改前改后对比 */
.case-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:0;overflow:hidden;transition:box-shadow .2s,transform .2s,border-color .2s;}
a.case-card{display:block;color:inherit;}
a.case-card:hover{text-decoration:none;box-shadow:var(--shadow-m);transform:translateY(-2px);border-color:var(--line-2);}
.case-card .top{padding:24px 26px 20px;border-bottom:1px solid var(--line);}
.case-card .top h3{margin:0 0 8px;font-size:18.5px;}
.case-card .top .place{font-size:13px;color:var(--muted);}
.case-card .delta{
  display:flex;align-items:baseline;gap:12px;padding:20px 26px;background:var(--paper-2);
  font-variant-numeric:tabular-nums;flex-wrap:nowrap;
}
.case-card .delta .from,.case-card .delta .to,.case-card .delta .unit{white-space:nowrap;}
.case-card .delta .from{font-size:19px;font-weight:700;color:var(--ink-3);}
.case-card .delta .arrow{color:var(--line-2);font-size:16px;}
.case-card .delta .to{font-size:26px;font-weight:800;color:var(--accent);letter-spacing:-.02em;}
.case-card .delta .unit{font-size:14px;color:var(--muted);font-weight:600;}
.case-card .body{padding:20px 26px 24px;}
.case-card .body p{font-size:15px;color:var(--ink-3);margin:0 0 12px;line-height:1.72;}
.case-card .body p:last-child{margin-bottom:0;}
.case-card .foot{padding:0 26px 22px;font-size:13px;color:var(--muted);}

/* ---------------- 表格 ---------------- */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:22px 0 24px;}
table{width:100%;border-collapse:collapse;font-size:15.5px;background:var(--card);border:1px solid var(--line);}
caption{text-align:left;font-size:13px;color:var(--muted);padding:0 0 10px;}
th,td{border-bottom:1px solid var(--line);padding:12px 15px;text-align:left;vertical-align:top;}
th{background:var(--paper-2);font-weight:700;font-size:13.5px;letter-spacing:.02em;color:var(--ink-2);border-bottom:1px solid var(--line-2);}
tbody tr:last-child td{border-bottom:0;}
tbody tr:hover{background:#FCFBF8;}
td.n,th.n{font-variant-numeric:tabular-nums;white-space:nowrap;}
td strong{font-weight:700;color:var(--ink);}
td .up{color:var(--green);font-weight:700;}

/* ---------------- 案例详情 ---------------- */
.crumb{font-size:13.5px;color:var(--muted);padding:24px 0 0;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--accent);}
.case-meta{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin:0 0 8px;}
.case-meta > div{background:var(--card);padding:18px 20px;}
.case-meta dt{font-size:12px;color:var(--muted);margin-bottom:6px;letter-spacing:.04em;}
.case-meta dd{margin:0;font-size:17px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.case-body{max-width:790px;}
.case-body h2{margin-top:52px;font-size:26px;padding-top:4px;border-top:1px solid var(--line);padding-top:30px;}
.case-body h2:first-of-type{border-top:0;padding-top:0;margin-top:40px;}
.case-body ul{padding-left:22px;margin:0 0 20px;}
.case-body li{margin-bottom:9px;}

/* 步骤 */
.step{border-left:2px solid var(--accent);padding:2px 0 2px 20px;margin:0 0 30px;}
.step h4{margin-top:0;font-size:16.5px;color:var(--ink);margin-bottom:6px;}
.step p{margin-bottom:10px;}
.step p:last-child{margin-bottom:0;}

/* 结果表 */
.result-table th:first-child{width:32%;}
.result-table td.n{font-weight:700;}

/* ---------------- FAQ ---------------- */
.faq-item{border-top:1px solid var(--line);padding:26px 0;}
.faq-item:first-of-type{border-top:0;padding-top:0;}
.faq-item h3{margin:0 0 12px;font-size:17.5px;line-height:1.55;}
.faq-item p{margin:0 0 12px;color:var(--ink-3);font-size:16px;}
.faq-item p:last-child{margin-bottom:0;}
.faq-item .note{font-size:14.5px;color:var(--muted);padding-left:14px;border-left:2px solid var(--line-2);}

/* ---------------- 联系 ---------------- */
.contact{background:var(--dark);color:#EDEAE4;padding:68px 0;}
.contact h2{color:#fff;font-size:26px;}
.contact .lede{color:#9A968D;margin-bottom:28px;}
.contact dl{display:grid;grid-template-columns:110px 1fr;gap:13px 22px;margin:0;font-size:16px;max-width:720px;}
.contact dt{color:#7C786F;font-size:14.5px;}
.contact dd{margin:0;color:#fff;}
.contact a{color:#F0B396;}
.contact a:hover{color:#fff;}

/* ---------------- 页脚 ---------------- */
.site-foot{background:var(--dark-2);color:#8C887F;padding:52px 0 40px;font-size:14px;}
.site-foot .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px;}
.site-foot h4{color:#D8D4CB;font-size:13px;letter-spacing:.1em;margin:0 0 14px;font-weight:700;}
.site-foot ul{list-style:none;padding:0;margin:0;}
.site-foot li{margin-bottom:9px;}
.site-foot a{color:#8C887F;}
.site-foot a:hover{color:#fff;}
.site-foot .brand{color:#D8D4CB;font-weight:600;margin-bottom:10px;}
.site-foot .bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:13px;color:#66625A;}

/* ---------------- 其他 ---------------- */
.hl{background:linear-gradient(transparent 60%,#F6D8C6 60%);font-weight:600;}
.kv{font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;}
.todo{display:inline-block;background:#FFF4D6;border:1px dashed #C79A00;color:#7A5B00;font-size:12.5px;padding:1px 8px;border-radius:2px;font-weight:600;}
.note-box{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:var(--r);padding:22px 26px;margin:26px 0;}
.note-box p:last-child{margin-bottom:0;}
.note-box h4{margin-top:0;}
.btn{display:inline-block;background:var(--ink);color:#fff;padding:13px 26px;border-radius:var(--r);font-size:15.5px;font-weight:600;transition:background .18s;}
.btn:hover{background:var(--accent);color:#fff;text-decoration:none;}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line-2);}
.btn.ghost:hover{background:var(--paper-2);color:var(--ink);border-color:var(--ink);}
.kicker{font-size:13px;color:var(--muted);letter-spacing:.1em;margin-bottom:10px;font-weight:600;}

/* 数字清单 */
.fact-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 30px;margin:26px 0;}
.fact-list > div{border-top:1px solid var(--line);padding-top:14px;}
.fact-list .k{font-size:13px;color:var(--muted);margin-bottom:5px;}
.fact-list .v{font-size:17px;font-weight:700;}

/* ---------------- 响应式 ---------------- */
@media (max-width:960px){
  .g3,.g4,.stat-band,.case-meta,.fact-list{grid-template-columns:1fr 1fr;}
  .stat-band > div{border-right:0;border-bottom:1px solid rgba(255,255,255,.08);}
  .site-foot .cols{grid-template-columns:1fr 1fr;}
  .hero-dark h1{font-size:34px;}
  .hero-plain h1{font-size:30px;}
  h2{font-size:25px;}
}
@media (max-width:680px){
  .wrap{padding:0 20px;}
  .g2,.g3,.g4,.stat-band,.case-meta,.fact-list{grid-template-columns:1fr;}
  .nav{display:none;}
  .hero-dark{padding:56px 0 0;}
  .hero-dark h1{font-size:28px;}
  .hero-dark .lede{font-size:16.5px;}
  .hero-plain{padding:52px 0 40px;}
  .hero-plain h1{font-size:25px;}
  section{padding:52px 0;}
  .stat-band .n{font-size:30px;}
  .contact dl{grid-template-columns:1fr;gap:6px;}
  .contact dt{margin-top:12px;}
  table{font-size:14px;}
  th,td{padding:10px 11px;}
  .site-foot .cols{grid-template-columns:1fr;gap:26px;}
}

@media print{
  .site-head,.site-foot,.contact{display:none;}
  body{background:#fff;}
}

/* ---------------- 规模条（P0-2 修复） ---------------- */
.scale-bar{background:var(--paper-2);border-bottom:1px solid var(--line);}
.scale-bar .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;}
.scale-bar > .wrap > div{
  padding:22px 24px;border-right:1px solid var(--line);
}
.scale-bar > .wrap > div:first-child{padding-left:0;}
.scale-bar > .wrap > div:last-child{border-right:0;}
.scale-bar .k{display:block;font-size:12.5px;color:var(--muted);letter-spacing:.06em;margin-bottom:5px;}
.scale-bar .v{display:block;font-size:22px;font-weight:800;letter-spacing:-.01em;font-variant-numeric:tabular-nums;}
@media (max-width:760px){
  .scale-bar .wrap{grid-template-columns:1fr 1fr;}
  .scale-bar > .wrap > div{border-right:0;border-bottom:1px solid var(--line);padding:16px 18px;}
  .scale-bar > .wrap > div:first-child{padding-left:18px;}
  .scale-bar .v{font-size:18px;}
}

/* 规矩清单 */
.rules{counter-reset:r;list-style:none;padding:0;margin:0;}
.rules li{
  counter-increment:r;position:relative;padding:20px 0 20px 62px;
  border-top:1px solid var(--line);
}
.rules li:first-child{border-top:0;}
.rules li::before{
  content:counter(r,decimal-leading-zero);position:absolute;left:0;top:20px;
  font-size:15px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;
}
.rules li h3{margin:0 0 6px;font-size:18px;}
.rules li p{margin:0;font-size:15.5px;color:var(--ink-3);}