/* yuai theme — inner page styles (Phase 4) */
.hero{position:relative;min-height:720px;display:flex;align-items:center;color:#fff;overflow:hidden;background:
radial-gradient(circle at 76% 42%,rgba(212,175,55,.22),transparent 34%),
linear-gradient(90deg,rgba(26,22,16,.98) 0%,rgba(26,22,16,.92) 52%,rgba(26,22,16,.76) 100%)}
.hero:before{content:"";position:absolute;inset:0;background:
linear-gradient(rgba(232,210,144,.045) 1px,transparent 1px),
linear-gradient(90deg,rgba(232,210,144,.045) 1px,transparent 1px);background-size:86px 86px}
.hero:after{content:"";position:absolute;right:-220px;top:120px;width:640px;height:640px;border-radius:50%;background:radial-gradient(circle,rgba(212,175,55,.14),transparent 66%)}
.yuai-main .hero-grid{position:relative;display:grid;grid-template-columns:1.03fr .97fr;gap:58px;align-items:center;z-index:1}
.yuai-main .hero .eyebrow{display:inline-flex;align-items:center;gap:10px;padding:8px 15px;border-radius:999px;background:rgba(212,175,55,.10);border:1px solid rgba(232,210,144,.26);color:#F7EBC0;font-size:14px}
.eyebrow i{width:8px;height:8px;border-radius:50%;background:var(--gold);box-shadow:0 0 18px var(--gold)}
.yuai-main .hero h1,.yuai-main .page-hero h1{font-size:clamp(44px,5.6vw,76px);line-height:1.05;margin:18px 0 24px;letter-spacing:-2px}
.yuai-main .hero h1 span,.yuai-main .page-hero h1 span{color:var(--champagne)}
.yuai-main .hero .hero-desc,.yuai-main .page-hero .hero-desc{font-size:18px;color:#E9DFC2;max-width:730px;margin:0 0 32px}
.yuai-main .hero .actions,.yuai-main .hero .btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:999px;font-weight:900;transition:.25s ease;border:1px solid transparent;cursor:pointer}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--gold),var(--champagne));color:#1A1610;box-shadow:0 18px 42px rgba(212,175,55,.22)}
.btn-ghost{background:rgba(255,255,255,.06);border-color:rgba(232,210,144,.28);color:#fff}
.btn-dark{background:var(--night);color:#F8E8A4;border-color:rgba(212,175,55,.24)}

.yuai-main .profit-panel{background:linear-gradient(180deg,rgba(248,248,250,.12),rgba(248,248,250,.05));border:1px solid rgba(232,210,144,.22);border-radius:34px;padding:26px;box-shadow:0 40px 100px rgba(0,0,0,.34);backdrop-filter:blur(12px)}
.yuai-main .panel-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;color:#F8E8A4;font-weight:900}
.panel-title span:last-child{font-size:13px;color:#D8CEB5}
.yuai-main .big-number{padding:24px;border-radius:26px;background:rgba(26,22,16,.52);border:1px solid rgba(232,210,144,.16);margin-bottom:14px}
.yuai-main .big-number b{display:block;font-size:42px;color:#F8E8A4;line-height:1}
.yuai-main .big-number span{color:#D8CEB5;font-size:14px}
.yuai-main .mini-stat{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:18px}
.yuai-main .mini-stat div{padding:16px;border-radius:20px;background:rgba(255,255,255,.06);border:1px solid rgba(232,210,144,.14)}
.yuai-main .mini-stat b{display:block;color:#F8E8A4;font-size:22px}
.yuai-main .mini-stat span{display:block;color:#D8CEB5;font-size:13px}
.yuai-main .chart{height:180px;display:flex;align-items:end;gap:9px;padding:18px;border-radius:24px;background:rgba(0,0,0,.20);border:1px solid rgba(232,210,144,.12)}
.yuai-main .bar{flex:1;border-radius:999px 999px 6px 6px;background:linear-gradient(180deg,#E8D290,#D4AF37);min-height:30px;box-shadow:0 0 20px rgba(212,175,55,.18)}
.bar:nth-child(2){height:56%}.bar:nth-child(3){height:42%}.bar:nth-child(4){height:68%}.bar:nth-child(5){height:50%}.bar:nth-child(6){height:76%}.bar:nth-child(7){height:62%}.bar:nth-child(8){height:84%}.bar:nth-child(9){height:58%}.bar:nth-child(10){height:70%}

section{padding:86px 0}
.bg-soft{background:var(--soft)}
.bg-dark{background:var(--night);color:#fff}
.bg-gradient{background:linear-gradient(180deg,#FFFEFA 0%,#F4E8C4 100%)}
.section-head{text-align:center;margin:0 auto 44px}
.yuai-main .section-head h2{font-size:clamp(30px,3.2vw,46px);line-height:1.18;margin:0 0 14px;color:var(--night);letter-spacing:-1px;white-space:nowrap}
.section-head[style*="text-align:left"] h2{white-space:normal}
.bg-dark .section-head h2{color:#F8E8A4}
.section-head p{margin:0 auto;max-width:780px;color:var(--muted);font-size:17px}
.bg-dark .section-head p{color:#D8CEB5}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:#fff;border:1px solid rgba(106,86,47,.12);border-radius:28px;padding:28px;box-shadow:0 18px 50px rgba(26,22,16,.07);transition:.25s ease}
.card:hover{transform:translateY(-5px);box-shadow:0 26px 70px rgba(26,22,16,.12)}
.icon{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--gold),var(--champagne));color:#1A1610;font-weight:900;margin-bottom:18px}
.card h3{font-size:22px;margin:0 0 10px;color:var(--night)}
.card p{margin:0;color:var(--muted)}
.gold-card{background:linear-gradient(180deg,#FFFDF8,#F8EBC1);border-color:rgba(212,175,55,.25)}
.gold-card h3{color:#6A562F}
.dark-card{background:rgba(255,255,255,.06);border-color:rgba(232,210,144,.16);box-shadow:none}
.dark-card h3{color:#F8E8A4}
.dark-card p{color:#D8CEB5}
.calc-wrap{display:grid;grid-template-columns:.95fr 1.05fr;gap:28px;align-items:stretch}
.calc-card{background:#fff;border-radius:34px;padding:34px;border:1px solid rgba(212,175,55,.16);box-shadow:0 24px 70px rgba(26,22,16,.10)}
.calc-card h3{font-size:30px;margin:0 0 18px;color:#1A1610}
.calc-item{display:flex;justify-content:space-between;gap:18px;padding:16px 0;border-bottom:1px solid rgba(106,86,47,.12);color:#554A38}
.calc-item:last-child{border-bottom:none}
.calc-item strong{color:#1A1610}
.result-box{background:linear-gradient(135deg,#1A1610,#3A2F1E 62%,#6A562F);color:#fff;border-radius:34px;padding:34px;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.result-box:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 25% 25%,rgba(212,175,55,.25),transparent 32%)}
.result-box>*{position:relative}
.result-box h3{font-size:30px;margin:0 0 22px;color:#F8E8A4}
.result-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.result-mini{padding:20px;border-radius:22px;background:rgba(255,255,255,.07);border:1px solid rgba(232,210,144,.18)}
.result-mini b{display:block;font-size:28px;color:#F8E8A4;line-height:1.2}
.result-mini span{display:block;font-size:13px;color:#D8CEB5;margin-top:5px}
.warn{margin-top:18px;padding:14px 16px;border-radius:18px;background:rgba(216,106,48,.10);border:1px solid rgba(216,106,48,.24);color:#F4D6C6;font-size:13px}
.yuai-main .table-wrap{overflow:auto;background:#fff;border-radius:30px;border:1px solid rgba(212,175,55,.16);box-shadow:0 24px 65px rgba(26,22,16,.08)}
.yuai-main .table-wrap table{width:100%;border-collapse:collapse;min-width:760px}
.yuai-main .table-wrap th,.yuai-main .table-wrap td{padding:20px 22px;text-align:left;border-bottom:1px solid rgba(106,86,47,.10)}
.yuai-main .table-wrap th{background:#F7F0D7;color:#6A562F;font-weight:900}
.yuai-main .table-wrap td{color:#554A38;background:#fff}
.yuai-main .table-wrap tr:last-child td{border-bottom:none}
.yuai-main .table-wrap td:first-child{font-weight:900;color:#1A1610}
.note-box{padding:22px;border-radius:26px;background:#FFFDF8;border:1px solid rgba(212,175,55,.18);color:#6F675B}
.note-box strong{color:#6A562F}

/* ---- shared extras ---- */
:root {
  --soft: #fbfaf6;
  --text: #1a1610;
  --muted: #6f675b;
}
.yuai-main section { padding: 86px 0; }
.yuai-main .bg-soft { background: var(--soft); }
.yuai-main .bg-dark { background: var(--night); color: #fff; }
.yuai-main .bg-gradient { background: linear-gradient(180deg, #fffefa 0%, #f4e8c4 100%); }
.yuai-main .section-head h2 { white-space: normal; }
.yuai-main {
  overflow-x: clip;
  max-width: 100%;
}

/* ---- hero 垂直间距 ---- */
.yuai-main .hero {
  padding: 24px 0 32px;
}
.yuai-main .hero .eyebrow,
.yuai-main .hero .tag {
  margin-bottom: 22px;
}
.yuai-main .hero h1,
.yuai-main .hero .hero-title {
  margin: 0 0 26px;
  line-height: 1.14;
  letter-spacing: -1px;
}
.yuai-main .hero .hero-subtitle {
  margin: 0 0 24px;
  line-height: 1.55;
}
.yuai-main .hero .hero-desc {
  margin: 0 0 36px;
  line-height: 1.85;
}
.yuai-main .hero .actions,
.yuai-main .hero .btns {
  margin: 0 0 40px;
  gap: 16px;
}
.yuai-main .hero-grid {
  padding: 16px 0 28px;
}
.yuai-main .hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 56px;
  align-items: center;
  padding: 92px 0 80px;
}
.yuai-main .hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 0;
  gap: 16px;
}
.yuai-main .hero .metric {
  padding: 18px 16px;
  line-height: 1.65;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(232, 210, 144, 0.16);
}
.yuai-main .hero .metric strong {
  display: block;
  margin-bottom: 8px;
  color: #f8e8a4;
}
.yuai-main .hero .metric span {
  color: #d8ceb5;
  font-size: 13px;
}

/* ---- product page ---- */
.yuai-main .hero-card {
  background: linear-gradient(180deg, rgba(248, 248, 250, 0.12), rgba(248, 248, 250, 0.05));
  border: 1px solid rgba(232, 210, 144, 0.22);
  border-radius: 34px;
  padding: 18px;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.34);
}
.yuai-main .device-show {
  height: 430px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    url("../images/product-1.jpg") center/cover no-repeat;
}
.yuai-main .device-info {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 14px;
}
.yuai-main .info-box {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(232, 210, 144, 0.14);
  color: #f8e8a4;
  font-size: 13px;
}
.yuai-main .info-box strong { display: block; margin-bottom: 4px; }
.yuai-main .split {
  display: grid;
  grid-template-columns: 0.96fr 1.04fr;
  gap: 42px;
  align-items: center;
}
.yuai-main .photo {
  min-height: 380px;
  border-radius: 30px;
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow);
}
.yuai-main .photo.factory {
  background-image: linear-gradient(180deg, rgba(23, 19, 14, 0.08), rgba(23, 19, 14, 0.18)),
    url("../images/product-2.jpg");
}
.yuai-main .photo.scene {
  background-image: linear-gradient(180deg, rgba(23, 19, 14, 0.06), rgba(23, 19, 14, 0.16)),
    url("../images/scenic.jpg");
}
.yuai-main .photo.hardware { background-image: url("../images/a2.png"); }
.yuai-main .photo.system { background-image: url("../images/a4.png"); }
.yuai-main .photo.backend { background-image: url("../images/a5.jpg"); }
.yuai-main .photo.scenic { background-image: url("../images/scenic.jpg"); }
.yuai-main .feature {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 14px;
  color: #554a38;
}
.yuai-main .feature b {
  flex: 0 0 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--gold), var(--champagne));
  color: #1a1610;
  display: grid;
  place-items: center;
  font-size: 13px;
}
.yuai-main .flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.yuai-main .flow--five { grid-template-columns: repeat(5, 1fr); gap: 14px; }
.yuai-main .flow--arrows {
  display: flex;
  align-items: stretch;
  gap: 0;
}
.yuai-main .flow--arrows .step {
  flex: 1 1 0;
  min-width: 0;
}
.yuai-main .flow-arrow {
  flex: 0 0 52px;
  align-self: center;
  display: grid;
  place-items: center;
  color: #b8943a;
  line-height: 1;
  user-select: none;
}
.yuai-main .flow-arrow::before {
  content: "";
  display: block;
  width: 16px;
  height: 16px;
  border-right: 5px solid #b8943a;
  border-top: 5px solid #b8943a;
  transform: rotate(45deg);
  margin-left: -8px;
}
.yuai-main .step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
  text-align: center;
}
.yuai-main .step b {
  display: block;
  color: #6a562f;
  font-size: 28px;
  line-height: 1;
  margin-bottom: 14px;
}
.yuai-main .step h3 { margin: 0 0 8px; font-size: 18px; color: #17130e; }
.yuai-main .step p { margin: 0; color: #70685c; font-size: 13px; }

/* ---- product param section ---- */
.yuai-main .param-simple .section-head {
  margin-bottom: 44px;
}
.yuai-main .param-layout {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 36px;
  align-items: stretch;
  margin-bottom: 52px;
}
.yuai-main .param-photo {
  border-radius: 28px;
  overflow: hidden;
  min-height: 100%;
  background: #f3e5b2;
  box-shadow: var(--shadow);
}
.yuai-main .param-photo img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  display: block;
}
.yuai-main .param-simple-table {
  overflow: hidden;
  border-radius: 28px;
  border: 1px solid rgba(212, 175, 55, 0.16);
  box-shadow: 0 20px 55px rgba(26, 22, 16, 0.07);
  background: #fff;
}
.yuai-main .param-simple-table table {
  width: 100%;
  min-width: 0;
  table-layout: fixed;
  border-collapse: collapse;
}
.yuai-main .param-simple-table th,
.yuai-main .param-simple-table td {
  padding: 17px 20px;
  text-align: left;
  border-bottom: 1px solid rgba(106, 86, 47, 0.1);
  vertical-align: middle;
  line-height: 1.6;
}
.yuai-main .param-simple-table th {
  background: #f3e5b2;
  color: #6a562f;
  font-weight: 900;
}
.yuai-main .param-simple-table td:first-child {
  width: 34%;
  font-weight: 900;
  color: #1a1610;
}
.yuai-main .param-simple-table td:nth-child(2) {
  color: #554a38;
}
.yuai-main .param-simple-table tr:last-child td {
  border-bottom: none;
}
.yuai-main .param-feature-simple {
  gap: 20px;
}

.yuai-main .scene-band {
  text-align: center;
  padding: 48px;
  border-radius: 32px;
  background: linear-gradient(135deg, #1a1610, #3a2f1e);
  color: #fff;
}
.yuai-main .scene-band h2 { color: #f8e8a4; margin: 0 0 12px; }
.yuai-main .scene-band p { color: #e9dfc2; max-width: 760px; margin: 0 auto; }
.yuai-main .scene-band .actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

/* ---- cases page ---- */
.yuai-main .hero--cases {
  background: linear-gradient(90deg, rgba(23, 19, 14, 0.95) 0%, rgba(23, 19, 14, 0.88) 42%, rgba(23, 19, 14, 0.45) 100%),
    url("../images/a8.jpg") center/cover no-repeat;
}
.yuai-main .hero-card-only .hero-img {
  height: 400px;
  border-radius: 22px;
  background: url("../images/dining.jpg") center/cover no-repeat;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}
.yuai-main .hero-card-only {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(232, 210, 144, 0.22);
  border-radius: 28px;
  padding: 12px;
  box-shadow: 0 30px 88px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(10px);
}
.yuai-main .cream { background: linear-gradient(180deg, #fbfaf6, #f2ead6); }
.yuai-main .sec-head { text-align: center; max-width: 780px; margin: 0 auto 40px; }
.yuai-main .sec-head h2 {
  font-size: clamp(30px, 3.4vw, 44px);
  line-height: 1.18;
  margin: 0 0 12px;
  color: #18130e;
  letter-spacing: -1px;
}
.yuai-main .sec-head p { margin: 0; color: #6e675e; font-size: 16px; }
.yuai-main .cream .grid4 { gap: 18px; }
.yuai-main .cream .card {
  padding: 24px;
  border-radius: 24px;
  box-shadow: 0 18px 55px rgba(26, 22, 16, 0.08);
}
.yuai-main .cream .card h3 { margin: 0 0 8px; font-size: 20px; color: #17130e; }
.yuai-main .cream .card p { margin: 0; color: #6e675e; font-size: 14px; }
.yuai-main .cream .icon {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  margin-bottom: 14px;
}
.yuai-main .dark { background: linear-gradient(180deg, #18130e, #241e15); color: #fff; }
.yuai-main .dark .sec-head h2 { color: #f4d46a; }
.yuai-main .dark .sec-head p { color: #d8ceb5; }
.yuai-main .dark .icon-img {
  width: 72px;
  height: 72px;
  margin-bottom: 18px;
  display: grid;
  place-items: center;
}
.yuai-main .dark .icon-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.yuai-main .case-grid-six { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.yuai-main .case-card-six {
  position: relative;
  min-height: 265px;
  border-radius: 26px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow);
}
.yuai-main .case-card-six::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 34%, rgba(23, 19, 14, 0.88));
}
.yuai-main .case-text {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 20px;
  z-index: 1;
  color: #fff;
}
.yuai-main .case-text b {
  display: inline-block;
  color: #17130e;
  background: linear-gradient(135deg, var(--gold), var(--gold2));
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  margin-bottom: 9px;
}
.yuai-main .case-text h3 { margin: 0 0 6px; font-size: 22px; }
.yuai-main .case-text p { margin: 0; color: #ede2c2; font-size: 14px; }
.yuai-main .case-layout {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 22px;
  align-items: stretch;
}
.yuai-main .list { display: grid; gap: 12px; }
.yuai-main .list-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 15px 16px;
}
.yuai-main .list-row em {
  font-style: normal;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  background: #f3e5b2;
  color: #6a562f;
  font-weight: 900;
  display: grid;
  place-items: center;
  font-size: 13px;
}
.yuai-main .list-row strong { display: block; color: #17130e; margin-bottom: 2px; }
.yuai-main .list-row span { display: block; color: #70685c; font-size: 14px; }
.yuai-main .table {
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid rgba(212, 175, 55, 0.22);
  background: #fff;
}
.yuai-main .table table { width: 100%; border-collapse: collapse; min-width: auto; }
.yuai-main .table th,
.yuai-main .table td { padding: 17px 20px; border-bottom: 1px solid rgba(106, 86, 47, 0.1); }
.yuai-main .table th { background: #f3e5b2; color: #6a562f; }

/* ---- inner-page hero shell (strength / cases / revenue) ---- */
.yuai-main .hero--strength,
.yuai-main .hero--cases,
.yuai-main .hero--revenue {
  position: relative;
  min-height: 600px;
  padding: 0;
  overflow: hidden;
  color: #fff;
  box-sizing: border-box;
}
.yuai-main .hero--strength .hero-inner,
.yuai-main .hero--cases .hero-inner,
.yuai-main .hero--revenue .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  align-items: center;
  padding: 86px 0 72px;
}
.yuai-main .hero--strength .hero-inner,
.yuai-main .hero--cases .hero-inner {
  grid-template-columns: 1fr;
  gap: 0;
}
.yuai-main .hero--revenue .hero-grid {
  grid-template-columns: 1.03fr 0.97fr;
  gap: 58px;
}
.yuai-main .hero--strength:before,
.yuai-main .hero--cases:before,
.yuai-main .hero--revenue:before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 22%, rgba(212, 175, 55, 0.16), transparent 28%),
    linear-gradient(90deg, rgba(232, 210, 144, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(232, 210, 144, 0.03) 1px, transparent 1px);
  background-size: auto, 78px 78px, 78px 78px;
  pointer-events: none;
}
.yuai-main .hero--strength:after,
.yuai-main .hero--cases:after,
.yuai-main .hero--revenue:after {
  display: none;
}

/* ---- strength page ---- */
.yuai-main .hero--strength {
  background: linear-gradient(90deg, rgba(23, 19, 14, 0.95) 0%, rgba(23, 19, 14, 0.88) 42%, rgba(23, 19, 14, 0.42) 100%),
    url("../images/a9.jpg") center/cover no-repeat;
}
.yuai-main .hero--revenue {
  background: linear-gradient(90deg, rgba(26, 22, 16, 0.98) 0%, rgba(26, 22, 16, 0.92) 52%, rgba(26, 22, 16, 0.76) 100%),
    url("../images/hero-bg.jpg") center/cover no-repeat;
}
.yuai-main .hero--strength .hero-copy,
.yuai-main .hero--cases .hero-copy,
.yuai-main .hero--revenue .hero-copy {
  max-width: 640px;
}
.yuai-main .hero--strength .tag,
.yuai-main .hero--cases .tag,
.yuai-main .hero--revenue .tag {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(232, 210, 144, 0.28);
  background: rgba(255, 255, 255, 0.06);
  color: #e8d290;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 18px;
}
.yuai-main .hero--strength .hero-title,
.yuai-main .hero--cases .hero-title,
.yuai-main .hero--revenue .hero-title {
  margin: 0 0 12px;
  font-size: clamp(46px, 5vw, 72px);
  line-height: 1.04;
  letter-spacing: -2px;
  color: #fff;
  font-weight: 900;
}
.yuai-main .hero--strength .hero-subtitle,
.yuai-main .hero--cases .hero-subtitle,
.yuai-main .hero--revenue .hero-subtitle {
  margin: 0 0 18px;
  font-size: clamp(24px, 2.5vw, 36px);
  line-height: 1.35;
  color: #e8d290;
  font-weight: 800;
}
.yuai-main .hero--strength .hero-desc,
.yuai-main .hero--cases .hero-desc,
.yuai-main .hero--revenue .hero-desc {
  margin: 0 0 28px;
  font-size: 17px;
  line-height: 1.75;
  color: #efe4cc;
  max-width: 650px;
}
.yuai-main .hero--strength .btns,
.yuai-main .hero--cases .btns,
.yuai-main .hero--revenue .btns {
  margin: 0;
  gap: 14px;
}
.yuai-main .hero--strength .btn-gold,
.yuai-main .hero--cases .btn-gold,
.yuai-main .hero--revenue .btn-gold {
  padding: 13px 24px;
  height: auto;
  font-size: 15px;
  border: 1px solid transparent;
  box-shadow: 0 14px 35px rgba(212, 175, 55, 0.24);
}
.yuai-main .hero--strength .hero-card {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(232, 210, 144, 0.22);
  border-radius: 28px;
  padding: 12px;
  box-shadow: 0 30px 88px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(10px);
}
.yuai-main .hero--strength .hero-img {
  height: 400px;
  border-radius: 22px;
  background: url("../images/strength-hero.jpg") center/cover no-repeat;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}
.yuai-main .tech-showcase-section {
  background: linear-gradient(180deg, #17130e, #241e15);
}
.yuai-main .tech-showcase-section .tech-head {
  margin-bottom: 42px;
}
.yuai-main .tech-showcase-section .tech-head h2 {
  color: #f4d46a;
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: -1px;
}
.yuai-main .tech-showcase-section .tech-head p {
  color: #f4e8c7;
  font-size: 17px;
}
.yuai-main .tech-two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  align-items: stretch;
}
.yuai-main .tech-showcase-section .tech-show-card {
  border: 1px solid rgba(232, 210, 144, 0.2);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 28px;
  padding: 14px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}
.yuai-main .tech-img-frame {
  height: 330px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid rgba(232, 210, 144, 0.16);
  background: #2a2116;
}
.yuai-main .tech-img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.yuai-main .tech-content {
  padding: 24px 10px 8px;
}
.yuai-main .tech-content h3 {
  margin: 0 0 12px;
  color: #f4d46a;
  font-size: 28px;
  line-height: 1.2;
}
.yuai-main .tech-content p {
  margin: 0 0 16px;
  color: #f4e8c7;
  font-size: 15px;
  line-height: 1.8;
}
.yuai-main .tech-list { display: grid; gap: 11px; }
.yuai-main .tech-list div {
  border: 1px solid rgba(232, 210, 144, 0.14);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.055);
  padding: 13px 15px;
}
.yuai-main .tech-list strong {
  display: block;
  color: #fff;
  font-size: 15px;
  margin-bottom: 3px;
}
.yuai-main .tech-list span {
  display: block;
  color: #cfc4a8;
  font-size: 13px;
  line-height: 1.65;
}

/* ---- index page ---- */
.yuai-main#home section:not(.hero):not(#compare) { padding: 92px 0; }
.yuai-main#home .grid4 { gap: 18px; }
.yuai-main#home .card {
  border-radius: 26px;
  padding: 26px;
  box-shadow: 0 20px 55px rgba(26, 22, 16, 0.07);
}
.yuai-main#home .icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: #fbf3d5;
  border: 1px solid rgba(212, 175, 55, 0.3);
  color: #8d6e12;
  margin-bottom: 16px;
}
.yuai-main#home .split {
  grid-template-columns: 0.95fr 1.05fr;
  gap: 38px;
}
.yuai-main#home .feature {
  gap: 16px;
  padding: 18px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 12px 35px rgba(26, 22, 16, 0.05);
}
.yuai-main#home .feature b {
  flex: 0 0 auto;
  width: auto;
  height: auto;
  padding: 0;
  background: none;
  border-radius: 0;
  color: #8d6e12;
  font-size: inherit;
}
.yuai-main#home .feature strong { color: var(--night); }
.yuai-main#home .feature span { color: var(--muted); }

.yuai-main .hero--home,
.yuai-main .hero--product {
  min-height: 780px;
  padding: 0;
  align-items: center;
  background: linear-gradient(90deg, rgba(26, 22, 16, 0.95) 0%, rgba(26, 22, 16, 0.88) 45%, rgba(26, 22, 16, 0.58) 100%),
    url("../images/109_527.jpg") center/cover no-repeat;
}
.yuai-main .hero--home:before,
.yuai-main .hero--product:before {
  background:
    radial-gradient(circle at 22% 35%, rgba(212, 175, 55, 0.2), transparent 34%),
    radial-gradient(circle at 84% 20%, rgba(54, 201, 167, 0.08), transparent 26%),
    linear-gradient(rgba(232, 210, 144, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 210, 144, 0.045) 1px, transparent 1px);
  background-size: auto, auto, 86px 86px, 86px 86px;
}
.yuai-main .hero--home:after,
.yuai-main .hero--product:after { display: none; }
.yuai-main .hero--home .hero-grid {
  grid-template-columns: 1.05fr 0.95fr;
  gap: 58px;
  padding: 82px 0;
}
.yuai-main .hero--product .hero-grid {
  position: relative;
  z-index: 1;
  padding: 82px 0;
}
.yuai-main .hero--home h1 {
  margin: 0 0 24px;
  font-size: clamp(44px, 5.6vw, 76px);
  line-height: 1.05;
  letter-spacing: -2px;
}
.yuai-main .hero--home .hero-desc {
  font-size: 19px;
  color: #d8ceb5;
  max-width: 650px;
  margin: 0 0 32px;
  line-height: 1.75;
}
.yuai-main .hero--home .metric {
  border-radius: 20px;
  backdrop-filter: blur(10px);
  border-color: rgba(232, 210, 144, 0.18);
}
.yuai-main .hero--home .metric strong {
  font-size: 23px;
  color: #fff;
  margin-bottom: 4px;
}
.yuai-main .showcase {
  position: relative;
  min-height: 660px;
  border-radius: 36px;
  padding: 20px;
  background: linear-gradient(180deg, rgba(232, 210, 144, 0.15), rgba(255, 255, 255, 0.045));
  border: 1px solid rgba(232, 210, 144, 0.22);
  backdrop-filter: blur(16px);
  box-shadow: 0 35px 100px rgba(0, 0, 0, 0.34);
}
.yuai-main .show-img {
  height: 370px;
  border-radius: 28px;
  background: url("../images/home-show.jpg") center/cover no-repeat;
}
.yuai-main .device-card {
  position: absolute;
  left: 34px;
  right: 34px;
  bottom: 30px;
  border-radius: 30px;
  background: rgba(26, 22, 16, 0.94);
  border: 1px solid rgba(232, 210, 144, 0.2);
  padding: 24px;
}
.yuai-main .device-card h3 {
  font-size: 25px;
  margin: 0 0 8px;
  color: #fff;
}
.yuai-main .device-card p {
  margin: 0;
  color: #d8ceb5;
  font-size: 14px;
}
.yuai-main .chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.yuai-main .chip {
  padding: 7px 10px;
  border: 1px solid rgba(232, 210, 144, 0.18);
  border-radius: 999px;
  color: #f4e8c1;
  background: rgba(255, 255, 255, 0.06);
  font-size: 13px;
}

.yuai-main .bg-dark {
  position: relative;
  overflow: hidden;
}
.yuai-main .bg-dark:before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 78% 18%, rgba(212, 175, 55, 0.14), transparent 28%),
    url("../images/products-dark-bg.jpg") center/cover;
  opacity: 0.12;
  pointer-events: none;
}
.yuai-main .bg-dark .container { position: relative; z-index: 1; }
.yuai-main .bg-dark .section-head h2 { color: #fff; }
.yuai-main .bg-dark .section-head p { color: #d8ceb5; }
.yuai-main .bg-dark .card.product-card.dark-card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(232, 210, 144, 0.14);
  box-shadow: none;
  border-radius: 26px;
}
.yuai-main .bg-dark .card.product-card.dark-card:hover {
  transform: none;
  box-shadow: none;
}
.yuai-main .bg-dark .dark-card h3 { color: #fff; }
.yuai-main .bg-dark .dark-card p { color: #d8ceb5; }

.yuai-main .scene-photo {
  min-height: 420px;
  border-radius: 34px;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.06), rgba(0, 0, 0, 0.18)),
    url("../images/scene.jpg") center/cover no-repeat;
  box-shadow: var(--shadow);
}
.yuai-main .product-card { overflow: hidden; padding: 0; }
.yuai-main .product-card .img {
  height: 238px;
  border-radius: 0;
  background-size: cover;
  background-position: center;
  filter: saturate(0.88) contrast(1.04);
}
.yuai-main .product-card .img.p1 { background-image: url("../images/product-1.jpg"); }
.yuai-main .product-card .img.p2 { background-image: url("../images/product-2.jpg"); }
.yuai-main .product-card .img.p3 { background-image: url("../images/product-3.jpg"); }
.yuai-main .product-body { padding: 24px; }

.yuai-main#home .bg-gradient {
  background: linear-gradient(180deg, #fbfaf6 0%, #f4eedc 100%);
}

/* ---- home compare section ---- */
.yuai-main#home #compare.comparison-section {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: 60px 4.2vw 70px;
  overflow-x: clip;
  background:
    radial-gradient(circle at 50% 10%, rgba(255, 244, 217, 0.92) 0, rgba(255, 255, 255, 0) 36%),
    linear-gradient(180deg, #fbfaf6 0%, #f6f1e6 100%);
}
.yuai-main#home #compare .section-title {
  text-align: center;
  font-size: clamp(34px, 4.4vw, 72px);
  line-height: 1.15;
  letter-spacing: -2px;
  font-weight: 900;
  color: #15110d;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.03);
  margin: 0;
  white-space: normal;
}
.yuai-main#home #compare .section-subtitle {
  margin: 18px auto 0;
  padding: 0 1vw;
  text-align: center;
  font-size: clamp(15px, 1.45vw, 23px);
  line-height: 1.6;
  color: #777069;
  font-weight: 500;
  max-width: 900px;
}
.yuai-main#home #compare .table-card {
  position: relative;
  width: 100%;
  max-width: min(1600px, 100%);
  margin: 58px auto 0;
  border-radius: 30px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.82);
  box-shadow:
    0 34px 70px rgba(104, 73, 20, 0.12),
    0 2px 0 rgba(255, 255, 255, 0.88) inset;
}
.yuai-main#home #compare .comparison-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr) minmax(0, 1.15fr);
  width: 100%;
  max-width: 100%;
  border: 2px solid rgba(255, 255, 255, 0.86);
  border-radius: 30px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.72);
}
.yuai-main#home #compare .cell {
  min-height: 104px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(98, 82, 48, 0.14);
}
.yuai-main#home #compare .head {
  min-height: 92px;
  justify-content: center;
  text-align: center;
  font-size: 21px;
  font-weight: 800;
}
.yuai-main#home #compare .dimension-head {
  background: rgba(255, 255, 255, 0.78);
  color: #211b12;
}
.yuai-main#home #compare .traditional-head {
  background: linear-gradient(90deg, #f5f5f4 0%, #f2f2f1 100%);
  color: #747474;
  border-left: 1px solid rgba(0, 0, 0, 0.06);
}
.yuai-main#home #compare .brand-head {
  position: relative;
  color: #fff;
  font-size: clamp(22px, 2vw, 32px);
  letter-spacing: 0.5px;
  text-align: center;
  padding: 0 28px;
  background: linear-gradient(180deg, #e5b03c 0%, #c98714 100%);
  border-left: 2px solid rgba(216, 153, 32, 0.68);
  box-shadow:
    0 0 0 1px rgba(222, 165, 58, 0.28) inset,
    0 14px 30px rgba(197, 126, 12, 0.16);
  text-shadow: 0 2px 10px rgba(75, 38, 0, 0.28);
}
.yuai-main#home #compare .brand-head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 45%;
  height: 3px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.95) 50%, rgba(255, 255, 255, 0) 100%);
  filter: blur(1px);
}
.yuai-main#home #compare .recommend-badge {
  position: absolute;
  right: 34px;
  top: -12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 0 0 18px 18px;
  background: #fffdfa;
  color: #c97d08;
  font-size: 16px;
  font-weight: 900;
  box-shadow: 0 8px 20px rgba(144, 89, 8, 0.18);
  border: 2px solid rgba(229, 171, 54, 0.8);
  z-index: 3;
  transform: skewX(-10deg);
}
.yuai-main#home #compare .recommend-badge span {
  display: inline-block;
  transform: skewX(10deg);
}
.yuai-main#home #compare .dimension-cell {
  justify-content: center;
  padding: 0 24px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 22px;
  font-weight: 800;
  color: #1d1711;
  text-align: center;
}
.yuai-main#home #compare .traditional-cell {
  position: relative;
  padding: 22px 46px;
  color: #9a9a9a;
  font-size: 20px;
  line-height: 1.5;
  font-weight: 500;
  background: linear-gradient(90deg, #f7f7f6 0%, #fbfbfa 100%);
  border-left: 1px solid rgba(0, 0, 0, 0.045);
}
.yuai-main#home #compare .traditional-cell::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, rgba(0, 0, 0, 0.012) 0 1px, transparent 1px 10px);
  pointer-events: none;
}
.yuai-main#home #compare .traditional-cell span {
  position: relative;
  z-index: 1;
}
.yuai-main#home #compare .brand-cell {
  position: relative;
  padding: 22px 58px;
  font-size: 20px;
  line-height: 1.55;
  font-weight: 800;
  color: #16120d;
  background: linear-gradient(90deg, rgba(255, 250, 237, 0.95) 0%, rgba(255, 251, 243, 0.98) 72%, rgba(255, 244, 220, 0.8) 100%);
  border-left: 2px solid rgba(216, 153, 32, 0.7);
  border-bottom-color: rgba(204, 144, 30, 0.25);
}
.yuai-main#home #compare .brand-cell span {
  position: relative;
  z-index: 1;
}
.yuai-main#home #compare .brand-label {
  display: none;
}
.yuai-main#home #compare .brand-cell::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(211, 148, 23, 0.35) 50%, rgba(255, 255, 255, 0) 100%);
}
.yuai-main#home #compare .em {
  color: #a56b06;
  font-size: inherit;
  font-weight: 900;
  margin: 0 2px;
  white-space: normal;
}
.yuai-main#home #compare .cell:nth-last-child(-n+3) {
  border-bottom: 0;
}
@media (max-width: 1024px) {
  .yuai-main#home #compare.comparison-section {
    padding: 44px 18px 48px;
  }
  .yuai-main#home #compare .comparison-grid {
    grid-template-columns: 1fr;
  }
  .yuai-main#home #compare .head,
  .yuai-main#home #compare .cell {
    min-height: auto;
  }
  .yuai-main#home #compare .dimension-head,
  .yuai-main#home #compare .traditional-head,
  .yuai-main#home #compare .brand-head {
    display: none;
  }
  .yuai-main#home #compare .dimension-cell,
  .yuai-main#home #compare .traditional-cell,
  .yuai-main#home #compare .brand-cell {
    border-left: 0;
  }
  .yuai-main#home #compare .dimension-cell {
    min-height: 78px;
    padding: 18px 22px;
    background: #fff9ec;
    border-bottom: 0;
    justify-content: flex-start;
    text-align: left;
  }
  .yuai-main#home #compare .traditional-cell {
    padding: 18px 24px;
    min-height: 70px;
    flex-wrap: wrap;
    align-items: baseline;
  }
  .yuai-main#home #compare .traditional-cell::before {
    content: "传统KTV：";
    font-weight: 800;
    color: #8e8e8e;
    flex-shrink: 0;
  }
  .yuai-main#home #compare .brand-cell {
    padding: 22px 24px;
    min-height: 80px;
    margin-bottom: 14px;
    border: 1px solid rgba(213, 154, 35, 0.35);
    border-radius: 18px;
    flex-wrap: wrap;
    align-items: baseline;
  }
  .yuai-main#home #compare .brand-label {
    display: inline;
    font-weight: 800;
    color: #a56b06;
  }
  .yuai-main#home #compare .table-card {
    overflow: hidden;
    border-radius: 24px;
  }
  .yuai-main#home #compare .recommend-badge {
    display: none;
  }
}
@media (max-width: 640px) {
  .yuai-main#home #compare .section-title {
    letter-spacing: -1px;
  }
  .yuai-main#home #compare .dimension-cell,
  .yuai-main#home #compare .traditional-cell,
  .yuai-main#home #compare .brand-cell {
    font-size: 16px;
  }
  .yuai-main#home #compare .em {
    font-size: 1.12em;
  }
}

.yuai-main .case-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 24px; }
.yuai-main .case-big,
.yuai-main .case-small {
  position: relative;
  border-radius: 34px;
  min-height: 470px;
  padding: 30px;
  display: flex;
  align-items: flex-end;
  color: #fff;
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.yuai-main .case-big {
  background-image: linear-gradient(180deg, transparent, rgba(26, 22, 16, 0.78)), url("../images/camp.jpg");
}
.yuai-main .case-small {
  min-height: 223px;
}
.yuai-main .case-small.one {
  background-image: linear-gradient(180deg, transparent, rgba(26, 22, 16, 0.78)), url("../images/night.jpg");
}
.yuai-main .case-small.two {
  background-image: linear-gradient(180deg, transparent, rgba(26, 22, 16, 0.78)), url("../images/dining.jpg");
}
.yuai-main .case-big h3,
.yuai-main .case-small h3 {
  font-size: 25px;
  margin: 0 0 8px;
}
.yuai-main .case-big p,
.yuai-main .case-small p {
  margin: 0;
  color: #f0e7c8;
}
.yuai-main .case-stack { display: grid; gap: 24px; }
.yuai-main .profit { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
.yuai-main .bars {
  height: 340px;
  padding: 30px;
  border-radius: 30px;
  background: #fff;
  border: 1px solid var(--line);
  display: flex;
  align-items: end;
  gap: 18px;
  box-shadow: 0 20px 55px rgba(26, 22, 16, 0.07);
}
.yuai-main .bars .bar {
  flex: 1;
  border-radius: 14px 14px 0 0;
  background: linear-gradient(180deg, var(--champagne), var(--gold));
  position: relative;
}
.yuai-main .bars .bar span {
  position: absolute;
  left: 50%;
  top: -34px;
  transform: translateX(-50%);
  font-weight: 900;
  color: var(--night);
  white-space: nowrap;
}
.yuai-main .bars .bar em {
  position: absolute;
  left: 50%;
  bottom: -31px;
  transform: translateX(-50%);
  font-style: normal;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}
.yuai-main .bars .bar:nth-child(1) { height: 28%; }
.yuai-main .bars .bar:nth-child(2) { height: 48%; }
.yuai-main .bars .bar:nth-child(3) { height: 68%; }
.yuai-main .bars .bar:nth-child(4) { height: 90%; }
.yuai-main#home .about-bg,
.yuai-main .about-bg {
  background-color: #1a1610;
  background-image: linear-gradient(
      180deg,
      rgba(26, 22, 16, 0.18) 0%,
      rgba(26, 22, 16, 0.42) 100%
    ),
    url("../images/a3.jpg");
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  color: #fff;
}
.yuai-main .num-card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.yuai-main .num-card {
  border-radius: 24px;
  background: linear-gradient(180deg, #f8ebc1 0%, #fffdf8 52%, #fffcf5 100%);
  border: 1px solid rgba(212, 175, 55, 0.14);
  padding: 34px 24px 28px;
  box-shadow: 0 16px 48px rgba(26, 22, 16, 0.06);
}
.yuai-main .num-card .num {
  font-size: clamp(42px, 4vw, 56px);
  font-weight: 900;
  color: #d4af37;
  line-height: 1;
  margin-bottom: 18px;
}
.yuai-main .num-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  color: #1a1610;
}
.yuai-main .num-card p {
  margin: 0;
  color: #554a38;
  font-size: 14px;
  line-height: 1.75;
}
.yuai-main .scene-table-wrap {
  display: grid;
  grid-template-columns: minmax(0, 58%) minmax(340px, 42%);
  grid-template-rows: repeat(6, auto);
  align-items: stretch;
  background: transparent;
  border: none;
  box-shadow: none;
  overflow: visible;
}
.yuai-main .scene-table-panel {
  display: grid;
  grid-template-rows: subgrid;
  grid-row: span 6;
  min-width: 0;
}
.yuai-main .scene-table-panel--left {
  grid-column: 1;
  background: #fff;
  border: 1px solid rgba(212, 175, 55, 0.16);
  border-radius: 28px 0 0 28px;
  overflow: hidden;
  box-shadow: 0 24px 65px rgba(26, 22, 16, 0.08);
}
.yuai-main .scene-table-panel--advice {
  grid-column: 2;
  background: linear-gradient(180deg, #fffdf8, #f8f0d8);
  border: 1px solid rgba(212, 175, 55, 0.28);
  border-left: none;
  border-radius: 0 28px 28px 0;
  overflow: hidden;
  box-shadow: 8px 16px 48px rgba(26, 22, 16, 0.1);
}
.yuai-main .scene-row {
  display: flex;
  align-items: center;
  min-height: 72px;
  border-bottom: 1px solid rgba(106, 86, 47, 0.1);
}
.yuai-main .scene-row:last-child {
  border-bottom: none;
}
.yuai-main .scene-row--head {
  min-height: 68px;
}
.yuai-main .scene-table-panel--left .scene-row--head {
  background: #f7f0d7;
}
.yuai-main .scene-table-panel--advice .scene-row--head {
  background: linear-gradient(135deg, #e8d290, #d4af37);
}
.yuai-main .scene-col {
  display: flex;
  align-items: center;
  padding: 20px 24px;
  line-height: 1.7;
  text-align: left;
}
.yuai-main .scene-col--scene {
  flex: 0 0 32%;
  min-width: 0;
  font-size: 16px;
  font-weight: 900;
  color: #1a1610;
}
.yuai-main .scene-col--feature {
  flex: 1;
  min-width: 0;
  font-size: 16px;
  color: #554a38;
}
.yuai-main .scene-col--advice {
  width: 100%;
  font-size: 17px;
  font-weight: 900;
  color: #1a1610;
}
.yuai-main .scene-row--head .scene-col {
  font-size: 18px;
  font-weight: 900;
  color: #6a562f;
  padding-top: 0;
  padding-bottom: 0;
  min-height: 68px;
}
.yuai-main .scene-table-panel--advice .scene-row--head .scene-col--advice {
  color: #1a1610;
}
.yuai-main .about-bg .section-head h2 { color: #fff; }
.yuai-main .about-bg .section-head p { color: #d8ceb5; }
.yuai-main .support-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 28px;
}
.yuai-main .statbox {
  text-align: center;
  padding: 22px;
  border-radius: 22px;
  background: #fff;
  border: 1px solid var(--line);
}
.yuai-main .statbox strong { display: block; font-size: 28px; color: #6a562f; }
.yuai-main .news-more { margin-top: 28px; text-align: center; }
.yuai-main .news-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.yuai-main .news-card {
  background: #fff;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 20px 55px rgba(26, 22, 16, 0.07);
}
.yuai-main .news-cover {
  height: 210px;
  background-size: cover;
  background-position: center;
  filter: saturate(0.9) contrast(1.04);
}
.yuai-main .news-tabs .news-card:nth-child(1) .news-cover:not([style]) {
  background-image: url("../images/hero-bg.jpg");
}
.yuai-main .news-tabs .news-card:nth-child(2) .news-cover:not([style]) {
  background-image: url("../images/scene.jpg");
}
.yuai-main .news-tabs .news-card:nth-child(3) .news-cover:not([style]) {
  background-image: url("../images/bg-c2ab1fe1.jpg");
}
.yuai-main .news-body { padding: 24px; }
.yuai-main .news-tag {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  background: #fbf3d5;
  color: #8d6e12;
  font-size: 13px;
  font-weight: 900;
}
.yuai-main .news-card h3 {
  font-size: 22px;
  line-height: 1.35;
  margin: 0 0 10px;
  color: var(--night);
}
.yuai-main .news-card h3 a {
  color: inherit;
  text-decoration: none;
}
.yuai-main .news-card p {
  margin: 0 0 18px;
  color: var(--muted);
}
.yuai-main .news-card .news-body > a {
  font-weight: 900;
  color: #8d6e12;
  text-decoration: none;
}

/* ---- news pages ---- */
.yuai-main .hero--news {
  min-height: 520px;
  padding: 0;
  background: linear-gradient(90deg, rgba(23, 19, 14, 0.94) 0%, rgba(23, 19, 14, 0.72) 48%, rgba(23, 19, 14, 0.35) 100%),
    url("../images/a10.jpg") center/cover no-repeat;
}
.yuai-main .hero--news .hero-inner {
  padding: 110px 0 92px;
}
.yuai-main .hero--news .hero-title {
  margin: 0 0 22px;
  font-size: clamp(42px, 5vw, 68px);
  color: #fff;
}
.yuai-main .hero--news .hero-desc {
  max-width: 640px;
  margin: 0 0 30px;
  color: #e9dfc2;
  font-size: 16px;
}
.yuai-main .hero--news .btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--champagne));
  color: #1a1610;
  font-weight: 900;
  border-radius: 999px;
  padding: 13px 24px;
}
.yuai-main .news-page-main {
  background: var(--ivory);
  padding: 72px 0 88px;
}
.yuai-main .news-cate-head {
  color: var(--night);
  font-size: 28px;
  font-weight: 900;
  margin-bottom: 18px;
}
.yuai-main .news-cate-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}
.yuai-main .news-cate-tabs a {
  color: var(--muted);
  font-size: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.yuai-main .news-cate-tabs a:hover,
.yuai-main .news-cate-tabs a.active {
  color: var(--night);
  border-bottom-color: var(--gold);
}
.yuai-main .news-list-panel {
  background: #fff;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.yuai-main .news-row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) 168px;
  gap: 24px;
  align-items: center;
  padding: 28px 32px;
  border-bottom: 1px solid rgba(106, 86, 47, 0.1);
  transition: background 0.2s ease;
}
.yuai-main .news-row:last-child {
  border-bottom: none;
}
.yuai-main .news-row:hover {
  background: #fffdf8;
}
.yuai-main .news-date {
  position: relative;
  color: #afa386;
  font-size: 18px;
  font-weight: 700;
  padding-right: 18px;
}
.yuai-main .news-date::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 28px;
  height: 1px;
  background: rgba(106, 86, 47, 0.22);
  transform: translateY(-50%);
}
.yuai-main .news-body h3 {
  margin: 0 0 8px;
  font-size: 20px;
  color: #1a1610;
  line-height: 1.4;
}
.yuai-main .news-body p {
  margin: 0;
  color: #6f675b;
  font-size: 14px;
  line-height: 1.75;
}
.yuai-main .news-thumb {
  width: 168px;
  height: 112px;
  border-radius: 14px;
  overflow: hidden;
  background: #f3ead6;
}
.yuai-main .news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.yuai-main .news-pagination {
  margin-top: 28px;
  display: flex;
  justify-content: center;
}
.yuai-main .news-pagination .pagination,
.yuai-main .news-pagination ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.yuai-main .news-pagination a,
.yuai-main .news-pagination span {
  display: inline-grid;
  place-items: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}
.yuai-main .news-pagination .active span,
.yuai-main .news-pagination .current,
.yuai-main .news-pagination a.active {
  background: linear-gradient(135deg, var(--gold), var(--champagne));
  color: #1a1610;
  border-color: transparent;
  font-weight: 900;
}
.yuai-main .page-hero {
  padding: 72px 0 48px;
  background: linear-gradient(90deg, rgba(26, 22, 16, 0.95), rgba(26, 22, 16, 0.7)),
    url("../images/hero-bg.jpg") center/cover;
  color: #fff;
}
.yuai-main .page-hero h1 { margin: 0; font-size: clamp(36px, 4vw, 52px); }
.yuai-main .news-article-main {
  background: var(--ivory);
  padding: 56px 0 80px;
}
.yuai-main .article-wrap {
  max-width: 820px;
  margin: 0 auto;
}
.yuai-main .article-head {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.yuai-main .article-title {
  margin: 0 0 18px;
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.35;
  color: var(--night);
  letter-spacing: -0.5px;
}
.yuai-main .article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}
.yuai-main .article-meta a {
  color: #8d6e12;
  font-weight: 700;
}
.yuai-main .article-cover {
  margin: 0 0 28px;
}
.yuai-main .article-cover img {
  width: 100%;
  border-radius: 20px;
  display: block;
}
.yuai-main .article-body { line-height: 1.85; color: #333; }
.yuai-main .article-body p { margin: 0 0 1em; }
.yuai-main .article-nav {
  display: grid;
  gap: 12px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

/* ---- compare / data tables ---- */
.yuai-main .table-wrap {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 20px 55px rgba(26, 22, 16, 0.07);
}
.yuai-main .table-wrap table {
  width: 100%;
  min-width: 0;
  table-layout: fixed;
  border-collapse: collapse;
}
.yuai-main .table-wrap thead th {
  background: #f3e5b2;
  color: #6a562f;
  font-weight: 900;
  padding: 17px 20px;
  text-align: left;
  border-bottom: 1px solid rgba(106, 86, 47, 0.1);
}
.yuai-main .table-wrap tbody td {
  padding: 17px 20px;
  text-align: left;
  border-bottom: 1px solid rgba(106, 86, 47, 0.1);
  color: #554a38;
  background: #fff;
  vertical-align: top;
  line-height: 1.7;
  word-break: break-word;
}
.yuai-main .table-wrap tbody td:first-child {
  font-weight: 900;
  color: #1a1610;
  width: 14%;
}
.yuai-main .table-wrap tr:last-child td {
  border-bottom: none;
}
/* 收益页多列表格：小屏横向滚动 */
.yuai-main .table-wrap.table-scroll {
  overflow-x: auto;
}
.yuai-main .table-wrap.table-scroll table {
  min-width: 760px;
  table-layout: auto;
}

@media (max-width: 980px) {
  .section-head h2 {
    white-space: normal;
  }
  .yuai-main .param-layout,
  .yuai-main .tech-two-col {
    grid-template-columns: 1fr;
  }
  .yuai-main .tech-img-frame {
    height: 280px;
  }
  .yuai-main .hero--strength .hero-inner,
  .yuai-main .hero--cases .hero-inner {
    grid-template-columns: 1fr;
  }
  .yuai-main .hero--strength .hero-img,
  .yuai-main .hero-card-only .hero-img {
    height: 280px;
  }
  .yuai-main .hero--strength,
  .yuai-main .hero--cases,
  .yuai-main .hero--revenue {
    min-height: auto;
  }
  .yuai-main .param-photo img {
    min-height: 280px;
  }
  .yuai-main .hero-grid,
  .yuai-main .hero-inner,
  .yuai-main .hero--revenue .hero-grid,
  .yuai-main .split,
  .yuai-main .calc-wrap,
  .yuai-main .profit,
  .yuai-main .case-grid,
  .yuai-main .case-layout {
    grid-template-columns: 1fr;
  }
  .yuai-main .hero--revenue {
    background: linear-gradient(180deg, rgba(26, 22, 16, 0.98) 0%, rgba(26, 22, 16, 0.9) 100%),
      url("../images/hero-bg.jpg") center/cover no-repeat;
  }
  .yuai-main .hero--revenue .hero-grid {
    gap: 32px;
    padding: 56px 0 64px;
  }
  .yuai-main .hero--revenue .hero-copy {
    max-width: none;
  }
  .yuai-main .hero--revenue .hero-title {
    font-size: clamp(36px, 8vw, 52px);
    letter-spacing: -1.5px;
  }
  .yuai-main .hero--revenue .hero-subtitle {
    font-size: clamp(20px, 5vw, 28px);
  }
  .yuai-main .hero--revenue .hero-desc {
    max-width: none;
    font-size: 16px;
  }
  .yuai-main .hero--revenue .btns {
    flex-direction: column;
    align-items: stretch;
  }
  .yuai-main .hero--revenue .btn-gold {
    width: 100%;
    justify-content: center;
  }
  .yuai-main .hero--revenue .profit-panel {
    width: 100%;
    max-width: 100%;
    padding: 20px;
    border-radius: 24px;
    box-sizing: border-box;
  }
  .yuai-main .hero--revenue .big-number b {
    font-size: clamp(32px, 9vw, 42px);
  }
  .yuai-main .hero--revenue .big-number span {
    font-size: 13px;
    line-height: 1.65;
  }
  .yuai-main .hero--home .hero-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 48px 0 56px;
  }
  .yuai-main .hero--home {
    min-height: auto;
  }
  .yuai-main .hero--home .hero-desc {
    max-width: none;
    font-size: 16px;
  }
  .yuai-main .showcase {
    min-height: auto;
    padding: 16px;
    width: 100%;
  }
  .yuai-main .show-img {
    height: clamp(220px, 42vw, 320px);
  }
  .yuai-main .device-card {
    position: static;
    left: auto;
    right: auto;
    bottom: auto;
    margin-top: 14px;
    width: 100%;
  }
  .yuai-main#home .split {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .yuai-main#home .scene-photo {
    min-height: clamp(220px, 48vw, 320px);
    width: 100%;
  }
  .yuai-main .grid4,
  .yuai-main .grid3,
  .yuai-main .num-card-grid,
  .yuai-main .flow,
  .yuai-main .flow--five,
  .yuai-main .flow--arrows,
  .yuai-main .case-grid-six,
  .yuai-main .hero-metrics,
  .yuai-main .support-stats,
  .yuai-main .news-grid,
  .yuai-main .news-tabs,
  .yuai-main .device-info {
    grid-template-columns: 1fr 1fr;
  }
  .yuai-main .flow--arrows {
    flex-wrap: wrap;
    gap: 12px;
  }
  .yuai-main .flow--arrows .flow-arrow {
    display: none;
  }
  .yuai-main .flow--arrows .step {
    flex: 1 1 calc(50% - 12px);
  }
  .yuai-main .scene-table-wrap {
    display: block;
    overflow-x: auto;
  }
  .yuai-main .scene-table-panel {
    display: block;
    grid-row: auto;
  }
  .yuai-main .scene-table-panel--left,
  .yuai-main .scene-table-panel--advice {
    min-width: 860px;
  }
  .yuai-main .scene-table-panel--left {
    border-radius: 28px 28px 0 0;
    border-bottom: none;
  }
  .yuai-main .scene-table-panel--advice {
    border-radius: 0 0 28px 28px;
    border-left: 1px solid rgba(212, 175, 55, 0.28);
    margin-top: -1px;
  }
  .yuai-main .news-row {
    grid-template-columns: 72px minmax(0, 1fr);
  }
  .yuai-main .news-thumb {
    display: none;
  }
}
@media (max-width: 640px) {
  .yuai-main section { padding: 56px 0; }
  .yuai-main#home section:not(.hero):not(#compare) { padding: 68px 0; }
  .yuai-main .hero--strength,
  .yuai-main .hero--cases,
  .yuai-main .hero--revenue {
    min-height: auto;
    padding: 0;
  }
  .yuai-main .hero--strength .hero-inner,
  .yuai-main .hero--cases .hero-inner,
  .yuai-main .hero--revenue .hero-grid {
    padding: 48px 0 56px;
    gap: 24px;
  }
  .yuai-main .hero--revenue .hero-title {
    font-size: clamp(32px, 9vw, 40px);
    letter-spacing: -1px;
  }
  .yuai-main .hero--revenue .hero-subtitle {
    font-size: clamp(18px, 5vw, 24px);
    margin-bottom: 14px;
  }
  .yuai-main .hero--revenue .hero-desc {
    font-size: 15px;
    margin-bottom: 22px;
  }
  .yuai-main .hero--revenue .tag {
    font-size: 12px;
    margin-bottom: 14px;
  }
  .yuai-main .hero--revenue .panel-title {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    margin-bottom: 16px;
  }
  .yuai-main .hero--revenue .profit-panel {
    padding: 16px;
    border-radius: 20px;
  }
  .yuai-main .hero--revenue .big-number {
    padding: 18px;
  }
  .yuai-main .hero--revenue .mini-stat {
    gap: 10px;
    margin-bottom: 14px;
  }
  .yuai-main .hero--revenue .mini-stat div {
    padding: 12px;
  }
  .yuai-main .hero--revenue .mini-stat b {
    font-size: 18px;
  }
  .yuai-main .hero--revenue .mini-stat span {
    font-size: 12px;
  }
  .yuai-main .hero--revenue .chart {
    height: 132px;
    padding: 12px;
    gap: 6px;
  }
  .yuai-main .grid4,
  .yuai-main .grid3,
  .yuai-main .num-card-grid,
  .yuai-main .flow,
  .yuai-main .flow--five,
  .yuai-main .flow--arrows,
  .yuai-main .case-grid-six,
  .yuai-main .hero-metrics,
  .yuai-main .support-stats,
  .yuai-main .news-grid,
  .yuai-main .news-tabs,
  .yuai-main .device-info {
    grid-template-columns: 1fr;
  }
  .yuai-main .flow--arrows .step {
    flex: 1 1 100%;
  }
  .yuai-main .news-row {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 22px 20px;
  }
  .yuai-main .news-date::after {
    display: none;
  }
  .yuai-main .hero--news .hero-inner {
    padding: 72px 0 64px;
  }
  .yuai-main .hero--home .hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 36px 0 48px;
  }
  .yuai-main .hero--home h1 {
    font-size: clamp(32px, 9vw, 44px);
    letter-spacing: -1px;
  }
  .yuai-main .hero--home .hero-desc {
    font-size: 15px;
    line-height: 1.8;
  }
  .yuai-main .hero--home .actions {
    flex-direction: column;
    align-items: stretch;
  }
  .yuai-main .hero--home .actions .btn {
    width: 100%;
    justify-content: center;
  }
  .yuai-main .showcase {
    min-height: auto;
    padding: 14px;
    border-radius: 24px;
  }
  .yuai-main .show-img {
    height: clamp(200px, 56vw, 280px);
    border-radius: 20px;
  }
  .yuai-main .device-card {
    position: static;
    left: auto;
    right: auto;
    bottom: auto;
    margin-top: 12px;
    padding: 16px;
    border-radius: 20px;
  }
  .yuai-main .device-card h3 {
    font-size: 20px;
  }
  .yuai-main#home .split {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .yuai-main#home .scene-photo {
    min-height: clamp(200px, 56vw, 280px);
    border-radius: 24px;
  }
  .yuai-main#home .feature {
    padding: 16px;
  }
  .yuai-main .device-show { height: 280px; }
}