/* ============================================
   桑乐屋 SANGLEWU · 品牌官网样式
   配色：暖木棕 + 琥珀金 + 热气橙（桑拿木质暖调）
============================================ */

:root{
  --wood-900:#2a1810;      /* 深木棕 */
  --wood-800:#3d2417;      /* 桑拿木深色 */
  --wood-700:#5c3a24;      /* 桑拿木 */
  --wood-600:#7a4e30;      /* 中木色 */
  --amber:#c8851a;         /* 琥珀金 */
  --amber-bright:#e6a82e;  /* 亮琥珀 */
  --amber-deep:#a06a0f;    /* 深琥珀 */
  --ember:#e8632a;         /* 热气橙（点缀） */
  --ember-soft:#f08a52;    /* 柔橙 */
  --ink:#2a1810;
  --slate-700:#4a3a2e;
  --slate-500:#76695d;
  --slate-400:#a09489;
  --line:#ece3da;
  --line-soft:#f4ede4;
  --bg-soft:#faf6f0;
  --bg-paper:#fdfaf5;
  --white:#ffffff;
  --cream:#f5ede0;

  --font-sans:'Inter','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --font-cn:'Noto Sans SC','Inter',sans-serif;
  --font-serif:'Noto Serif SC','Noto Sans SC',serif;

  --container:1240px;
  --radius:4px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-cn);
  color:var(--ink);
  background:var(--white);
  line-height:1.7;
  font-weight:400;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
::selection{background:var(--amber);color:#fff}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}

/* ============ 顶部公告条 ============ */
.topbar{
  background:var(--wood-900);
  color:rgba(255,255,255,.72);
  font-size:12.5px;
  letter-spacing:.03em;
}
.topbar__inner{
  display:flex;justify-content:space-between;align-items:center;
  height:38px;font-family:var(--font-cn);font-weight:400;
}
.topbar__location{display:inline-flex;align-items:center;gap:6px}
.topbar__contact a{transition:color .2s}
.topbar__contact a:hover{color:var(--amber-bright)}
.topbar__contact .dot{margin:0 8px;opacity:.4}

/* ============ 导航 ============ */
.nav{
  position:fixed;top:38px;left:0;right:0;z-index:100;
  transition:all .4s var(--ease);
  background:rgba(255,253,250,.88);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  top:0;
  background:rgba(255,253,250,.95);
  border-bottom-color:var(--line);
  box-shadow:0 6px 30px -18px rgba(42,24,16,.25);
}
.nav__inner{
  display:flex;align-items:center;justify-content:space-between;
  height:74px;
}

.logo{display:flex;align-items:center;gap:12px;color:var(--wood-900)}
.logo__mark{
  width:36px;height:36px;border-radius:8px;position:relative;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--amber-bright) 0%,var(--ember) 100%);
  box-shadow:0 4px 14px -4px rgba(232,99,42,.5);
  color:#fff;
}
.logo__mark::after{
  content:"";position:absolute;inset:0;border-radius:8px;
  background:linear-gradient(135deg,rgba(255,255,255,.35),transparent 60%);
  pointer-events:none;
}
.logo__text{display:flex;flex-direction:column;line-height:1}
.logo__cn{
  font-family:var(--font-serif);font-weight:700;font-size:20px;letter-spacing:.08em;
  color:var(--wood-900);
}
.logo__en{
  font-family:var(--font-sans);font-size:9.5px;letter-spacing:.32em;color:var(--slate-500);
  margin-top:4px;font-weight:600;
}
.logo--light .logo__cn{color:#fff}
.logo--light .logo__en{color:rgba(255,255,255,.5)}

.nav__links{display:flex;align-items:center;gap:4px}
.nav__link{
  position:relative;font-size:15px;color:var(--slate-700);font-weight:500;
  padding:10px 15px;transition:color .25s;
}
.nav__link::after{
  content:"";position:absolute;left:15px;right:15px;bottom:4px;height:1.5px;
  background:var(--amber);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav__link:hover,.nav__link.active{color:var(--wood-900)}
.nav__link:hover::after,.nav__link.active::after{transform:scaleX(1)}
.nav__link--cta{
  margin-left:10px;padding:10px 22px;border-radius:var(--radius);
  background:linear-gradient(135deg,var(--amber-bright),var(--amber-deep));color:#fff!important;
  box-shadow:0 6px 18px -8px rgba(200,133,26,.7);
}
.nav__link--cta::after{display:none}
.nav__link--cta:hover{background:linear-gradient(135deg,var(--ember-soft),var(--amber-deep));transform:translateY(-1px)}

.nav__toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav__toggle span{width:24px;height:2px;background:var(--wood-900);border-radius:2px;transition:.3s}
.nav__toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__toggle.open span:nth-child(2){opacity:0}
.nav__toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:15px 30px;font-size:15px;font-weight:500;letter-spacing:.02em;
  border-radius:var(--radius);transition:all .3s var(--ease);
  font-family:var(--font-cn);
}
.btn--primary{background:linear-gradient(135deg,var(--amber-bright),var(--ember));color:#fff;box-shadow:0 10px 26px -10px rgba(232,99,42,.65)}
.btn--primary:hover{background:linear-gradient(135deg,var(--amber-bright),var(--amber-deep));transform:translateY(-2px);box-shadow:0 14px 30px -10px rgba(232,99,42,.75)}
.btn--ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.45)}
.btn--ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn--outline{background:transparent;color:var(--wood-800);border:1.5px solid var(--wood-700)}
.btn--outline:hover{background:var(--wood-800);color:#fff;border-color:var(--wood-800)}
.btn__arrow{transition:transform .3s var(--ease)}
.btn:hover .btn__arrow{transform:translateX(4px)}

/* ============ Hero ============ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;padding:160px 0 90px}
.hero__bg{
  position:absolute;inset:0;
  background:url('https://images.unsplash.com/photo-1540555700478-4be289aedcef?auto=format&fit=crop&w=2000&q=85') center/cover no-repeat;
  transform:scale(1.05);
  animation:heroZoom 18s ease-in-out infinite alternate;
}
@keyframes heroZoom{to{transform:scale(1.14)}}
.hero__overlay{
  position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(28,14,6,.9) 0%,rgba(58,30,18,.82) 40%,rgba(92,58,36,.55) 100%);
}
.hero__steam{
  position:absolute;left:0;right:0;bottom:0;height:40%;z-index:1;pointer-events:none;
  background:linear-gradient(to top,rgba(230,168,46,.12),transparent);
}
.hero__inner{position:relative;z-index:2;color:#fff;max-width:880px}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:14px;
  font-family:var(--font-cn);font-size:13px;letter-spacing:.16em;
  color:var(--amber-bright);font-weight:500;margin-bottom:30px;
}
.hero__eyebrow-line{width:38px;height:1.5px;background:var(--amber-bright)}
.hero__title{
  font-family:var(--font-serif);
  font-size:clamp(40px,6.4vw,80px);font-weight:900;line-height:1.08;letter-spacing:-.01em;
  margin-bottom:30px;
}
.hero__title span{
  background:linear-gradient(90deg,var(--amber-bright),var(--ember-soft));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero__desc{
  font-size:clamp(15px,1.4vw,18px);color:rgba(255,255,255,.8);
  font-weight:300;line-height:1.9;max-width:660px;margin-bottom:44px;
}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:80px}

.hero__stats{display:flex;gap:48px;flex-wrap:wrap;padding-top:42px;border-top:1px solid rgba(255,255,255,.16)}
.hero__stat-num{
  font-family:var(--font-sans);font-size:clamp(32px,3.6vw,46px);font-weight:700;
  color:#fff;line-height:1;letter-spacing:-.02em;
}
.hero__stat-num span{color:var(--amber-bright);font-size:.5em;margin-left:2px;font-weight:600}
.hero__stat-label{margin-top:10px;font-size:13px;color:rgba(255,255,255,.62);letter-spacing:.04em}

.hero__scroll{
  position:absolute;bottom:32px;left:50%;transform:translateX(-50%);z-index:3;
  width:22px;height:42px;border:1.5px solid rgba(255,255,255,.4);border-radius:14px;
  display:flex;justify-content:center;padding-top:8px;
}
.hero__scroll-line{width:2px;height:8px;background:var(--amber-bright);border-radius:2px;animation:scrollDot 1.8s var(--ease) infinite}
@keyframes scrollDot{0%{opacity:0;transform:translateY(-4px)}40%{opacity:1}100%{opacity:0;transform:translateY(14px)}}

/* ============ 通用章节头 ============ */
.section-head{max-width:760px;margin:0 auto 70px;text-align:center}
.section-head__eyebrow{
  display:inline-block;font-family:var(--font-sans);font-size:13px;letter-spacing:.22em;
  color:var(--amber-deep);font-weight:600;margin-bottom:22px;
}
.section-head__eyebrow--light{color:var(--amber-bright)}
.section-head__title{
  font-family:var(--font-serif);
  font-size:clamp(30px,4vw,50px);font-weight:700;line-height:1.2;letter-spacing:-.01em;color:var(--wood-900);
}
.section-head__title--light{color:#fff}
.section-head__desc{margin-top:24px;font-size:16.5px;color:var(--slate-500);line-height:1.9;font-weight:400}
.section-head__desc--light{color:rgba(255,255,255,.72)}

/* ============ 一句话价值主张 ============ */
.advantage{padding:80px 0;background:var(--cream);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.advantage__text{
  font-size:clamp(20px,2.1vw,28px);line-height:1.85;font-weight:300;color:var(--slate-700);
  text-align:center;max-width:1000px;margin:0 auto;
}
.advantage__text strong{color:var(--wood-800);font-weight:600}
.advantage__text span{color:var(--amber-deep);font-weight:600}
.advantage__brand{font-family:var(--font-serif);font-weight:700;color:var(--wood-900);letter-spacing:.04em}

/* ============ 产品系列 ============ */
.products{padding:120px 0}
.products__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.product{
  background:var(--white);border:1px solid var(--line);border-radius:10px;
  padding:42px 34px 38px;transition:all .4s var(--ease);position:relative;overflow:hidden;
}
.product::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--amber-bright),var(--ember));
  transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease);
}
.product:hover{transform:translateY(-6px);border-color:transparent;box-shadow:0 26px 50px -22px rgba(58,30,18,.28)}
.product:hover::before{transform:scaleX(1)}
.product--featured{background:linear-gradient(180deg,var(--bg-paper),var(--white));border-color:var(--amber)}
.product--featured::before{transform:scaleX(1)}
.product__media{
  width:84px;height:84px;border-radius:16px;margin-bottom:28px;
  display:flex;align-items:center;justify-content:center;position:relative;
  background:linear-gradient(135deg,var(--cream),#f0e2cc);color:var(--amber-deep);
  transition:all .4s var(--ease);
}
.product:hover .product__media{background:linear-gradient(135deg,var(--amber-bright),var(--ember));color:#fff;transform:rotate(-4deg)}
.product__iconbox{display:flex;align-items:center;justify-content:center}
.product__icon{width:48px;height:48px}
.product__tag{
  position:absolute;top:24px;right:28px;
  font-family:var(--font-sans);font-size:13px;font-weight:700;letter-spacing:.1em;
  color:var(--line);transition:color .3s;
}
.product:hover .product__tag{color:var(--amber)}
.product__badge{
  position:absolute;top:22px;left:24px;z-index:2;
  font-size:11px;font-weight:700;color:#fff;background:var(--ember);
  padding:4px 10px;border-radius:20px;letter-spacing:.05em;
}
.product__title{font-family:var(--font-serif);font-size:23px;font-weight:700;color:var(--wood-900);margin-bottom:4px}
.product__en{font-family:var(--font-sans);font-size:12.5px;color:var(--slate-400);letter-spacing:.06em;margin-bottom:18px}
.product__desc{font-size:14.5px;color:var(--slate-500);line-height:1.85;margin-bottom:24px}
.product__feats{display:flex;flex-wrap:wrap;gap:8px}
.product__feats li{
  font-size:12.5px;color:var(--wood-700);background:var(--bg-soft);
  padding:6px 12px;border-radius:20px;font-weight:500;
}

.products__more{margin-top:60px;text-align:center;padding-top:44px;border-top:1px dashed var(--line)}
.products__more-label{
  display:block;font-family:var(--font-sans);font-size:13px;letter-spacing:.2em;
  color:var(--slate-400);font-weight:600;margin-bottom:20px;
}
.products__more-tags{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.products__more-tags span{
  font-size:14px;color:var(--wood-700);padding:10px 20px;
  background:var(--white);border:1px solid var(--line);border-radius:30px;
  transition:all .3s;
}
.products__more-tags span:hover{border-color:var(--amber);color:var(--amber-deep);transform:translateY(-2px)}

/* ============ 核心优势（深色） ============ */
.advantages{
  position:relative;padding:120px 0;color:#fff;overflow:hidden;
  background:linear-gradient(160deg,var(--wood-900) 0%,var(--wood-800) 50%,var(--wood-700) 100%);
}
.advantages::before{
  content:"";position:absolute;top:-200px;right:-200px;width:600px;height:600px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,99,42,.2),transparent 70%);
}
.advantages::after{
  content:"";position:absolute;bottom:-150px;left:-150px;width:500px;height:500px;border-radius:50%;
  background:radial-gradient(circle,rgba(230,168,46,.12),transparent 70%);
}
.advantages__inner{position:relative;z-index:2}
.advantages__head{max-width:760px;margin-bottom:70px}
.advantages__head .section-head__title,
.advantages__head .section-head__desc{text-align:left}
.advantages__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.08);border-radius:10px;overflow:hidden}
.adv-item{background:rgba(255,255,255,.02);padding:42px 32px;transition:background .4s}
.adv-item:hover{background:rgba(232,99,42,.08)}
.adv-item__num{
  font-family:var(--font-sans);font-size:13px;font-weight:700;color:var(--amber-bright);
  letter-spacing:.1em;margin-bottom:18px;
}
.adv-item__icon{
  width:56px;height:56px;color:var(--amber-bright);margin-bottom:22px;
  padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.12);
}
.adv-item__icon svg{width:100%;height:100%}
.adv-item__title{font-family:var(--font-serif);font-size:20px;font-weight:600;color:#fff;margin-bottom:14px}
.adv-item__desc{font-size:14.5px;color:rgba(255,255,255,.64);line-height:1.85;font-weight:300}

/* ============ 服务流程 ============ */
.process{padding:120px 0;background:var(--bg-paper)}
.process__grid{display:grid;grid-template-columns:repeat(5,1fr);gap:24px;position:relative}
.process__grid::before{
  content:"";position:absolute;top:38px;left:10%;right:10%;height:2px;
  background:repeating-linear-gradient(to right,var(--amber) 0 8px,transparent 8px 16px);
  z-index:0;
}
.process__step{text-align:center;position:relative;z-index:1}
.process__num{
  width:76px;height:76px;margin:0 auto 24px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-sans);font-size:28px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--amber-bright),var(--ember));
  box-shadow:0 10px 24px -10px rgba(232,99,42,.6);
  border:4px solid var(--bg-paper);
}
.process__title{font-family:var(--font-serif);font-size:19px;font-weight:700;color:var(--wood-900);margin-bottom:10px}
.process__desc{font-size:14px;color:var(--slate-500);line-height:1.8;padding:0 8px}

/* ============ 案例 / 应用场景 ============ */
.cases{padding:120px 0}
.cases__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.case{
  position:relative;min-height:340px;border-radius:12px;overflow:hidden;
  display:flex;align-items:flex-end;padding:38px;color:#fff;cursor:pointer;
  background-image:var(--img);background-size:cover;background-position:center;
  transition:transform .5s var(--ease);
}
.case__overlay{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(28,14,6,.92) 0%,rgba(58,30,18,.5) 50%,rgba(92,58,36,.2) 100%);
  transition:background .4s;
}
.case:hover{transform:scale(1.01)}
.case:hover .case__overlay{background:linear-gradient(to top,rgba(28,14,6,.94) 0%,rgba(232,99,42,.45) 100%)}
.case__content{position:relative;z-index:2}
.case__idx{
  font-family:var(--font-sans);font-size:13px;font-weight:700;letter-spacing:.15em;
  color:var(--amber-bright);display:block;margin-bottom:10px;
}
.case__title{font-family:var(--font-serif);font-size:26px;font-weight:700;margin-bottom:8px}
.case__desc{font-size:15px;color:rgba(255,255,255,.8);font-weight:300}

/* ============ 客户评价 ============ */
.testimonials{padding:120px 0;background:var(--bg-soft)}
.testimonials__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.quote{
  background:var(--white);border:1px solid var(--line);border-radius:12px;
  padding:38px 32px;position:relative;transition:all .3s;
}
.quote:hover{transform:translateY(-4px);box-shadow:0 20px 40px -22px rgba(58,30,18,.25)}
.quote__stars{color:var(--amber-bright);font-size:16px;letter-spacing:2px;margin-bottom:18px}
.quote blockquote{
  font-size:15.5px;color:var(--slate-700);line-height:1.9;font-weight:400;
  margin-bottom:26px;position:relative;
}
.quote figcaption{display:flex;align-items:center;gap:14px}
.quote__avatar{
  width:46px;height:46px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--amber-bright),var(--ember));color:#fff;
  font-family:var(--font-serif);font-size:18px;font-weight:700;
}
.quote__name{font-size:15px;font-weight:600;color:var(--wood-900)}
.quote__loc{font-size:13px;color:var(--slate-400);margin-top:2px}

/* ============ 服务区域 ============ */
.area{padding:120px 0;background:var(--white)}
.area__inner{display:grid;grid-template-columns:1.1fr 1fr;gap:70px;align-items:center}
.area__desc{margin-top:30px;font-size:16px;color:var(--slate-500);line-height:1.95}
.area__desc strong{color:var(--amber-deep);font-weight:600}
.area__cities{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.area__city{
  display:inline-block;text-decoration:none;
  font-size:14px;color:var(--wood-700);padding:9px 18px;
  background:var(--bg-soft);border:1px solid var(--line);border-radius:30px;
  transition:all .3s;
}
.area__city--main{
  background:linear-gradient(135deg,var(--amber-bright),var(--amber-deep));color:#fff;border-color:transparent;font-weight:600;
}
.area__city--main:hover{color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px -10px rgba(200,133,26,.5)}
.area__city:hover{border-color:var(--amber);color:var(--amber-deep);transform:translateY(-2px)}
.area__btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.area__btn{margin-top:0}
.area__visual{display:flex;flex-direction:column;gap:18px}
.area__card{
  background:linear-gradient(135deg,var(--cream),var(--bg-paper));
  border:1px solid var(--line);border-radius:12px;padding:24px 28px;
  display:flex;align-items:center;gap:20px;transition:all .3s;
}
.area__card:hover{transform:translateX(6px);box-shadow:0 14px 30px -18px rgba(58,30,18,.3)}
.area__card-icon{font-size:32px;flex-shrink:0}
.area__card-title{font-family:var(--font-serif);font-size:17px;font-weight:700;color:var(--wood-900)}
.area__card-text{font-size:14px;color:var(--slate-500);margin-top:4px}
.area__card-text strong{color:var(--amber-deep)}

/* ============ 关于 ============ */
.about{padding:120px 0;background:var(--cream)}
.about__inner{display:grid;grid-template-columns:1.1fr 1fr;gap:80px;align-items:center}
.about__body{margin-top:32px}
.about__body p{font-size:15.5px;color:var(--slate-500);line-height:1.95;margin-bottom:20px;font-weight:400}
.about__body p:last-child{margin-bottom:0}
.about__certs{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}
.about__cert{
  font-family:var(--font-sans);font-size:13px;font-weight:700;color:var(--wood-700);
  padding:10px 18px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--white);letter-spacing:.04em;transition:all .3s;
}
.about__cert:hover{border-color:var(--amber);color:var(--amber-deep)}
.about__visual{position:relative;height:480px}
.about__visual-bg{
  position:absolute;inset:0;border-radius:14px;
  background:linear-gradient(160deg,var(--wood-900),var(--wood-700));
  background-image:linear-gradient(160deg,rgba(28,14,6,.85),rgba(92,58,36,.7)),
    url('https://images.unsplash.com/photo-1571019613454-1cb2f99b2d8b?auto=format&fit=crop&w=900&q=80');
  background-size:cover;background-position:center;
  box-shadow:0 30px 60px -25px rgba(58,30,18,.5);
}
.about__badge{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:180px;height:180px;border-radius:50%;
  background:rgba(255,255,255,.08);backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.25);
  display:flex;align-items:center;justify-content:center;
  animation:badgeFloat 5s ease-in-out infinite;
}
@keyframes badgeFloat{50%{transform:translate(-50%,calc(-50% - 10px))}}
.about__badge-ring{position:absolute;inset:10px;border-radius:50%;border:1px dashed rgba(255,255,255,.3);animation:spin 22s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.about__badge-core{position:relative;text-align:center;color:#fff;font-family:var(--font-sans)}
.about__badge-top{display:block;font-size:11px;letter-spacing:.3em;color:var(--amber-bright);margin-bottom:6px}
.about__badge-year{display:block;font-size:36px;font-weight:700;letter-spacing:.02em}
.about__badge-bot{display:block;font-size:10px;letter-spacing:.28em;color:rgba(255,255,255,.6);margin-top:6px}
.about__stat{
  position:absolute;bottom:28px;right:28px;
  background:rgba(255,255,255,.95);backdrop-filter:blur(10px);
  padding:22px 28px;border-radius:10px;
  box-shadow:0 18px 40px -16px rgba(28,14,6,.4);
}
.about__stat-num{font-family:var(--font-sans);font-size:40px;font-weight:700;color:var(--wood-900);line-height:1}
.about__stat-num span{color:var(--amber);font-size:.45em;margin-left:2px}
.about__stat-label{font-size:13px;color:var(--slate-500);margin-top:8px;line-height:1.4}

/* ============ FAQ ============ */
.faq{padding:120px 0;background:var(--white)}
.faq__list{max-width:820px;margin:0 auto}
.faq__item{
  border:1px solid var(--line);border-radius:10px;margin-bottom:14px;
  background:var(--bg-paper);overflow:hidden;transition:border-color .3s;
}
.faq__item[open]{border-color:var(--amber)}
.faq__item summary{
  padding:22px 28px;font-family:var(--font-serif);font-size:17px;font-weight:600;color:var(--wood-900);
  cursor:pointer;list-style:none;position:relative;padding-right:60px;
  display:flex;align-items:center;
}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary::after{
  content:"+";position:absolute;right:28px;top:50%;transform:translateY(-50%);
  font-size:24px;color:var(--amber);font-weight:300;transition:transform .3s;
}
.faq__item[open] summary::after{content:"\2212";transform:translateY(-50%) rotate(180deg)}
.faq__answer{
  padding:0 28px 24px;font-size:15px;color:var(--slate-500);line-height:1.9;
}

/* ============ 联系 CTA ============ */
.contact{padding:120px 0;background:var(--bg-soft)}
.contact__card{
  background:linear-gradient(130deg,var(--wood-900) 0%,var(--wood-700) 100%);
  border-radius:16px;overflow:hidden;
  display:grid;grid-template-columns:1.2fr 1fr;position:relative;
  box-shadow:0 40px 70px -30px rgba(58,30,18,.5);
}
.contact__card::before{
  content:"";position:absolute;top:-100px;right:-100px;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,99,42,.28),transparent 70%);
}
.contact__left{padding:64px 56px;position:relative;z-index:2}
.contact__title{font-family:var(--font-serif);font-size:clamp(28px,3.2vw,42px);font-weight:700;color:#fff;line-height:1.2;margin:22px 0 18px}
.contact__desc{font-size:16px;color:rgba(255,255,255,.72);line-height:1.85;margin-bottom:34px;max-width:440px}
.contact__right{
  padding:64px 56px;background:rgba(0,0,0,.18);position:relative;z-index:2;
  display:flex;flex-direction:column;justify-content:center;gap:26px;
}
.contact__item{display:flex;flex-direction:column;gap:6px}
.contact__label{font-size:12.5px;color:var(--amber-bright);letter-spacing:.12em;text-transform:uppercase;font-family:var(--font-sans);font-weight:600}
.contact__value{font-size:18px;color:#fff;font-weight:500;transition:color .25s}
a.contact__value:hover{color:var(--amber-bright)}
.contact__value--static{color:rgba(255,255,255,.85);font-weight:400}

/* ============ 页脚 ============ */
.footer{background:var(--wood-900);color:rgba(255,255,255,.6);padding:72px 0 0}
.footer__inner{display:grid;grid-template-columns:1.3fr 2fr;gap:60px;padding-bottom:54px}
.footer__tagline{margin-top:22px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.5);font-weight:300}
.footer__cols{display:grid;grid-template-columns:repeat(4,1fr);gap:30px}
.footer__col{display:flex;flex-direction:column;gap:13px}
.footer__title{color:#fff;font-size:15px;font-weight:600;margin-bottom:6px;letter-spacing:.02em}
.footer__col a,.footer__static{font-size:14px;color:rgba(255,255,255,.55);transition:color .25s}
.footer__col a:hover{color:var(--amber-bright)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1)}
.footer__bottom-inner{
  display:flex;justify-content:space-between;align-items:center;height:60px;
  font-size:12.5px;color:rgba(255,255,255,.4);letter-spacing:.03em;
}

/* ============ 滚动渐显动画 ============ */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.visible{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media(max-width:1024px){
  .products__grid{grid-template-columns:repeat(2,1fr)}
  .advantages__grid{grid-template-columns:repeat(2,1fr)}
  .process__grid{grid-template-columns:repeat(3,1fr)}
  .process__grid::before{display:none}
  .testimonials__grid{grid-template-columns:1fr;max-width:600px;margin:0 auto}
  .about__inner,.area__inner{gap:50px}
  .footer__cols{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:820px){
  .container{padding:0 22px}
  .topbar{display:none}
  .nav{top:0}
  .nav__inner{height:64px}
  .nav__links{
    position:fixed;top:64px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;padding:14px 22px 28px;
    box-shadow:0 20px 40px -20px rgba(58,30,18,.3);
    transform:translateY(-130%);transition:transform .4s var(--ease);pointer-events:none;
    max-height:calc(100vh - 64px);overflow-y:auto;
  }
  .nav__links.open{transform:none;pointer-events:auto}
  .nav__link{padding:14px 4px;border-bottom:1px solid var(--line-soft);font-size:16px}
  .nav__link::after{display:none}
  .nav__link--cta{margin:14px 0 0;text-align:center}

  .hero{padding:130px 0 70px;min-height:auto}
  .hero__stats{gap:30px 40px}
  .hero__stat{flex:1 1 40%}

  .section-head{margin-bottom:50px}
  .products,.advantages,.process,.cases,.testimonials,.area,.about,.faq,.contact{padding:80px 0}
  .advantage{padding:60px 0}

  .products__grid,.advantages__grid,.cases__grid{grid-template-columns:1fr}
  .advantages__head .section-head__title,.advantages__head .section-head__desc{text-align:center}
  .advantages__head{max-width:760px;margin-left:auto;margin-right:auto}
  .process__grid{grid-template-columns:repeat(2,1fr)}

  .about__inner,.area__inner{grid-template-columns:1fr;gap:50px}
  .about__visual{height:380px}

  .contact__card{grid-template-columns:1fr}
  .contact__left,.contact__right{padding:44px 32px}
  .contact__right{border-top:1px solid rgba(255,255,255,.1)}

  .footer__inner{grid-template-columns:1fr;gap:40px}
  .footer__bottom-inner{flex-direction:column;gap:6px;height:auto;padding:18px 0;text-align:center}
}
@media(max-width:480px){
  .hero__stats{flex-direction:column;gap:24px}
  .hero__stat{flex:none}
  .btn{padding:13px 24px;font-size:14px}
  .process__grid{grid-template-columns:1fr}
  .footer__cols{grid-template-columns:1fr}
  .contact__left,.contact__right{padding:36px 24px}
}