/* ==========================================================================
   小荷 Xiaohe — Tile export site (Monalisa-style)
   配色：品牌金 #B89768 + 暖白 + 炭黑；Outfit 无衬线 + 等宽数字
   ========================================================================== */

:root{
  --gold:#B89768;
  --gold-dark:#a0835a;
  --gold-deep:#8a6f4a;
  --gold-soft:#f3ece0;
  --cream:#f7f4ee;
  --white:#ffffff;
  --ink:#1a1a1a;
  --ink-2:#5a5a5a;
  --line:#e6e1d7;
  --dark:#141414;
  --dark-2:#1e1e1e;

  --disp:'Outfit',system-ui,-apple-system,'Segoe UI',sans-serif;
  --body:'Outfit',system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SF Mono',monospace;

  --radius:6px;
  --shadow:0 10px 40px -18px rgba(0,0,0,.45);
  --maxw:1200px;
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--body);
  color:var(--ink);
  background:var(--white);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
section{padding:72px 0;}

/* 按钮 */
.btn{
  display:inline-block;font-family:var(--body);font-weight:600;font-size:14px;
  letter-spacing:.06em;text-transform:uppercase;padding:14px 30px;border-radius:2px;
  cursor:pointer;transition:all .2s ease;border:1px solid transparent;
}
.btn-gold{background:var(--gold);color:#fff;}
.btn-gold:hover{background:var(--gold-dark);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:#000;}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-outline:hover{background:var(--ink);color:#fff;}

/* 通用小元素 */
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin-bottom:14px;}
.eyebrow.light{color:var(--gold);}
h1,h2,h3{font-family:var(--disp);font-weight:600;line-height:1.15;letter-spacing:-.01em;text-wrap:balance;}
.section-title{font-size:clamp(26px,3.2vw,38px);font-weight:600;text-transform:uppercase;letter-spacing:.04em;margin-bottom:14px;}
.section-sub{color:var(--ink-2);max-width:60ch;margin-bottom:40px;}
.text-gold{color:var(--gold);}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* 标语条（Elevate Your Vision） */
.lead-band{background:var(--cream);padding:38px 0;text-align:center;}
.lead-band p{font-size:clamp(18px,2.6vw,24px);color:var(--ink);max-width:66ch;margin:0 auto;font-weight:300;}
.lead-band b{color:var(--gold-deep);font-weight:600;}

/* ============ 头部 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .3s ease,box-shadow .3s ease;
}
.topbar{background:#0d0d0d;color:rgba(255,255,255,.62);font-size:12px;letter-spacing:.04em;border-bottom:1px solid rgba(255,255,255,.08);}
.topbar .container{padding-top:8px;padding-bottom:8px;text-align:center;}
.site-header > .container{display:flex;align-items:center;justify-content:space-between;height:76px;}
.site-header.scrolled{background:rgba(20,20,20,.92);backdrop-filter:blur(10px);box-shadow:0 2px 20px rgba(0,0,0,.25);}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-family:var(--disp);font-size:21px;font-weight:600;letter-spacing:.02em;}
.logo .logo-mark{flex:0 0 auto;display:block;}
.logo b{font-weight:300;color:rgba(255,255,255,.62);font-size:.6em;letter-spacing:.06em;margin-left:2px;}
.nav{display:flex;align-items:center;gap:30px;}
.nav a{color:rgba(255,255,255,.82);font-size:15px;font-weight:500;transition:color .2s;}
.nav a:hover,.nav a.active{color:#fff;}
.nav .nav-cta{display:none;}
.menu-toggle{display:none;background:none;border:none;color:#fff;font-size:26px;cursor:pointer;}

/* 移动端菜单 */
.mobile-menu{position:fixed;inset:0;background:var(--dark);z-index:99;display:none;flex-direction:column;padding:100px 32px 40px;gap:6px;}
.mobile-menu.open{display:flex;}
.mobile-menu a{color:#fff;font-size:20px;font-family:var(--disp);padding:12px 0;border-bottom:1px solid rgba(255,255,255,.1);}
.mobile-menu a:hover{color:var(--gold);}

/* ============ 首页 Hero ============ */
.hero{position:relative;height:92vh;min-height:560px;display:flex;align-items:center;justify-content:center;color:#fff;overflow:hidden;}
.hero-bg{position:absolute;inset:0;z-index:-2;}
.hero-bg img{width:100%;height:100%;object-fit:cover;}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(ellipse at center,rgba(10,10,10,.72) 0%,rgba(10,10,10,.45) 60%,rgba(10,10,10,.3) 100%);}
.hero-content{max-width:820px;text-align:center;}
.hero h1{font-size:clamp(36px,5.6vw,62px);color:#fff;margin:0 auto 20px;}
.hero p{font-size:18px;color:rgba(255,255,255,.88);max-width:60ch;margin:0 auto 34px;}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;}

/* 数据条 */
.stats{background:var(--dark);color:#fff;padding:44px 0;}
.stats-note{grid-column:1/-1;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);text-align:center;}
.stats .container{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center;}
.stat .num{font-family:var(--disp);font-size:clamp(28px,3.4vw,44px);color:var(--gold);line-height:1;}
.stat .lbl{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.6);margin-top:10px;}

/* ============ 分类卡片 ============ */
.cats{background:var(--cream);}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cat-card{position:relative;height:300px;overflow:hidden;border-radius:var(--radius);display:block;}
.cat-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.cat-card:hover img{transform:scale(1.06);}
.cat-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(0,0,0,.78));}
.cat-card .info{position:absolute;left:22px;bottom:20px;right:22px;color:#fff;z-index:1;}
.cat-card .info h3{font-size:22px;color:#fff;}
.cat-card .info span{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);}

/* ============ 产品网格 ============ */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.prod-card{background:#fff;}
.prod-card .ph{position:relative;aspect-ratio:1;overflow:hidden;background:var(--cream);}
.prod-card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.prod-card:hover .ph img{transform:scale(1.05);}
.prod-card .tag{position:absolute;top:12px;left:12px;background:var(--gold);color:#fff;font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:5px 10px;}
.prod-card .meta{padding:16px 2px 0;}
.prod-card .meta h3{font-size:17px;margin-bottom:4px;}
.prod-card .meta .series{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--gold);}
.prod-card .meta .size{font-family:var(--mono);font-size:12px;color:var(--ink-2);margin-top:4px;}
.section-cta{text-align:center;margin-top:40px;}

/* ============ 关于 / 品牌块 ============ */
.about-split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
.about-split .img{aspect-ratio:4/3;overflow:hidden;border-radius:var(--radius);}
.about-split .img img{width:100%;height:100%;object-fit:cover;}
.about-split h2{margin-bottom:18px;}
.about-split p{color:var(--ink-2);margin-bottom:16px;}
.checks{margin-top:18px;display:grid;gap:10px;}
.checks li{display:flex;gap:10px;align-items:flex-start;color:var(--ink-2);}
.checks li::before{content:"✓";color:var(--gold);font-weight:700;}

/* 认证卡片 */
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cert{background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);padding:28px;}
.cert h3{font-size:18px;margin-bottom:10px;}
.cert p{color:var(--ink-2);font-size:14.5px;}

/* ============ CTA 横幅 ============ */
.cta-band{background:linear-gradient(120deg,var(--gold-deep),var(--gold));color:#fff;text-align:center;}
.cta-band h2{color:#fff;margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.9);margin-bottom:28px;}
.cta-band .btn{background:#fff;color:var(--gold-deep);}
.cta-band .btn:hover{background:var(--cream);}

/* ============ 页脚 ============ */
.site-footer{background:#0d0d0d;color:rgba(255,255,255,.6);padding:60px 0 30px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;margin-bottom:40px;}
.site-footer h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:#fff;margin-bottom:16px;}
.site-footer a{display:block;padding:4px 0;color:rgba(255,255,255,.55);font-size:14px;}
.site-footer a:hover{color:var(--gold);}
.site-footer .logo{color:#fff;margin-bottom:14px;}
.site-footer p{font-size:14px;max-width:34ch;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;font-size:12.5px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;}

/* ============ 内页头部 ============ */
.page-hero{position:relative;padding:214px 0 90px;color:#fff;overflow:hidden;}
.page-hero .bg{position:absolute;inset:0;z-index:-2;}
.page-hero .bg img{width:100%;height:100%;object-fit:cover;}
.page-hero::after{content:"";position:absolute;inset:0;z-index:-1;background:rgba(10,10,10,.72);}
.page-hero h1{font-size:clamp(34px,5vw,54px);color:#fff;margin-bottom:12px;}
.page-hero p{color:rgba(255,255,255,.8);max-width:60ch;}
.breadcrumb{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:18px;letter-spacing:.04em;}
.breadcrumb a:hover{color:var(--gold);}

/* ============ 产品筛选 tab ============ */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:36px;}
.tab{padding:10px 20px;border:1px solid var(--line);border-radius:999px;font-size:14px;font-weight:500;cursor:pointer;background:#fff;color:var(--ink);transition:all .2s;}
.tab:hover{border-color:var(--gold);color:var(--gold-dark);}
.tab.active{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ============ 产品详情 ============ */
.detail{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.gallery .main{aspect-ratio:1;overflow:hidden;border-radius:var(--radius);background:var(--cream);}
.gallery .main img{width:100%;height:100%;object-fit:cover;}
.gallery .thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:10px;}
.gallery .thumbs img{aspect-ratio:1;object-fit:cover;border-radius:4px;cursor:pointer;opacity:.7;transition:opacity .2s;}
.gallery .thumbs img:hover{opacity:1;}
.detail-info h1{font-size:clamp(26px,3.4vw,36px);margin-bottom:6px;}
.detail-info .series{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:18px;}
.detail-info .desc{color:var(--ink-2);margin-bottom:24px;}
.specs{width:100%;border-collapse:collapse;margin-bottom:28px;font-size:14.5px;}
.specs td{padding:11px 0;border-bottom:1px solid var(--line);}
.specs td:first-child{color:var(--ink-2);width:42%;}
.specs td:last-child{font-family:var(--mono);font-variant-numeric:tabular-nums;}
.detail-ctas{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 询盘表单 ============ */
.contact-layout{display:grid;grid-template-columns:1fr 1.2fr;gap:56px;align-items:start;}
.contact-info h2{margin-bottom:16px;}
.contact-info p{color:var(--ink-2);margin-bottom:22px;}
.contact-info .row{display:flex;gap:12px;margin-bottom:16px;color:var(--ink-2);}
.contact-info .row b{color:var(--ink);display:block;}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);}
.form-card h3{margin-bottom:22px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:7px;}
.field input,.field select,.field textarea{
  width:100%;font-family:var(--body);font-size:15px;color:var(--ink);
  padding:12px 14px;border:1px solid var(--line);border-radius:4px;background:var(--white);
}
.field textarea{min-height:110px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px var(--gold-soft);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.form-note{font-size:13px;color:var(--ink-2);margin-top:14px;}
.form-success{display:none;background:#eef6ef;border:1px solid #bfe0c8;color:#1f5e36;padding:16px;border-radius:4px;margin-top:16px;font-size:14.5px;}
.form-success.show{display:block;}

/* ============ 响应式 ============ */
@media (max-width:960px){
  .cat-grid,.cert-grid{grid-template-columns:repeat(2,1fr);}
  .prod-grid{grid-template-columns:repeat(2,1fr);}
  .stats .container{grid-template-columns:repeat(2,1fr);}
  .about-split,.detail,.contact-layout{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:680px){
  .nav{display:none;}
  .menu-toggle{display:block;}
  .cat-grid,.prod-grid,.cert-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .hero{min-height:520px;}
  .footer-grid{grid-template-columns:1fr;}
  section{padding:52px 0;}
}

/* ==========================================================================
   交互增强：首屏 Ken Burns、导航下划线、产品 hover 交叉淡入、滚动淡入、
   WhatsApp 悬浮、回到顶部
   ========================================================================== */

/* 首屏缓慢缩放 */
.hero-bg img{animation:kenburns 20s ease-in-out infinite alternate;}
@keyframes kenburns{from{transform:scale(1);}to{transform:scale(1.1) translateY(-1.5%);}}

/* 导航下划线 */
.nav > a:not(.btn){position:relative;}
.nav > a:not(.btn)::after{content:"";position:absolute;left:0;bottom:-8px;width:0;height:2px;background:var(--gold);transition:width .25s ease;}
.nav > a:not(.btn):hover::after,.nav > a:not(.btn).active::after{width:100%;}

/* 产品卡片：hover 抬升 + 第二张图交叉淡入 */
.prod-card{transition:transform .35s ease,box-shadow .35s ease;}
.prod-card:hover{transform:translateY(-6px);box-shadow:0 22px 44px -22px rgba(0,0,0,.35);}
.prod-card .ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.prod-card .ph img.alt{opacity:0;transition:opacity .45s ease;}
.prod-card .ph img:first-child{transition:transform .6s ease;}
.prod-card:hover .ph img.alt{opacity:1;}
.prod-card:hover .ph img:first-child{transform:scale(1.06);}

/* 进入视口淡入（main.js 自动添加 .reveal/.in，无 JS 时保持可见） */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.6,.2,1),transform .7s cubic-bezier(.2,.6,.2,1);}
.reveal.in{opacity:1;transform:none;}

/* 统计数字：等宽数字 */
.stat .num{font-variant-numeric:tabular-nums;}

/* WhatsApp 悬浮按钮 */
.wa-float{
  position:fixed;right:22px;bottom:22px;z-index:90;width:56px;height:56px;border-radius:50%;
  background:#25d366;color:#fff;display:grid;place-items:center;box-shadow:0 8px 24px -8px rgba(37,211,102,.6);
  transition:transform .2s ease,box-shadow .2s ease;
}
.wa-float:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 12px 30px -8px rgba(37,211,102,.7);}

/* 回到顶部按钮 */
.to-top{
  position:fixed;right:26px;bottom:92px;z-index:90;width:44px;height:44px;border-radius:50%;
  background:var(--ink);color:#fff;border:1px solid rgba(255,255,255,.18);font-size:18px;line-height:1;
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .3s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:var(--gold);}

@media (prefers-reduced-motion:reduce){
  .hero-bg img{animation:none;}
  .reveal{opacity:1;transform:none;transition:none;}
  .prod-card,.prod-card .ph img{transition:none;}
}