/* =========================================================
   怡莹卫生用品 · 共享样式
   风格：清新淡绿 · 自然舒适
   ========================================================= */
:root{
  --green:#6fae7f;          /* 主绿，柔和自然 */
  --green-deep:#4d8a60;     /* 深绿，强调 */
  --green-dark:#3a6b49;     /* 更深，文字/页脚 */
  --green-soft:#eaf4ec;     /* 浅绿背景 */
  --green-mist:#f2f8f2;     /* 更浅 */
  --cream:#f8fbf6;          /* 米白偏绿 */
  --ink:#2c3a31;            /* 深绿灰主文字 */
  --muted:#748179;          /* 次要文字 */
  --line:#e2ece3;           /* 边框 */
  --white:#ffffff;
  --radius:16px;
  --radius-sm:10px;
  --maxw:1180px;
  --shadow:0 12px 32px rgba(77,138,96,.10);
  --shadow-sm:0 4px 14px rgba(77,138,96,.07);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--cream);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:76px 0}
.section-tight{padding:52px 0}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:999px;
  font-weight:600;font-size:15px;transition:.25s ease;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 6px 16px rgba(111,174,127,.28)}
.btn-primary:hover{background:var(--green-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(77,138,96,.32)}
.btn-outline{background:#fff;color:var(--green-deep);border-color:var(--green)}
.btn-outline:hover{background:var(--green-soft)}

/* 段落标题 */
.eyebrow{display:inline-block;color:var(--green-deep);font-weight:700;font-size:13px;
  letter-spacing:3px;text-transform:uppercase;margin-bottom:12px}
.title{font-size:30px;font-weight:800;letter-spacing:-.3px;line-height:1.3}
.subtitle{color:var(--muted);font-size:16px;margin-top:12px;max-width:660px}
.center{text-align:center}
.center .subtitle{margin-left:auto;margin-right:auto}
.sec-head{margin-bottom:46px}

/* ============ 顶栏 ============ */
.site-header{position:sticky;top:0;z-index:60;background:rgba(248,251,246,.88);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:17px;color:var(--green-dark)}
.brand img{height:40px;width:auto}
.nav-menu{display:flex;gap:30px;font-size:15px}
.nav-menu a{color:var(--ink);position:relative;padding:4px 0;transition:.2s}
.nav-menu a:hover,.nav-menu a.active{color:var(--green-deep)}
.nav-menu a.active::after{content:"";position:absolute;left:0;bottom:-4px;width:100%;height:2px;
  background:var(--green);border-radius:2px}
.nav-cta .btn{padding:9px 20px;font-size:14px}
.nav-toggle{display:none;background:none;border:0;font-size:26px;color:var(--green-dark);cursor:pointer}

/* ============ 页面小头图（子页） ============ */
.page-hero{background:linear-gradient(180deg,var(--green-soft),var(--cream));
  padding:60px 0 54px;border-bottom:1px solid var(--line)}
.page-hero .crumb{color:var(--muted);font-size:14px;margin-bottom:14px}
.page-hero .crumb a:hover{color:var(--green-deep)}
.page-hero h1{font-size:34px;font-weight:800;letter-spacing:-.3px}
.page-hero p{color:var(--muted);font-size:16px;margin-top:12px;max-width:640px}

/* ============ Footer ============ */
.site-footer{background:#1f2320;color:#d5dcd8;padding:60px 0 26px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.6fr 2fr 1.5fr;gap:48px}
.site-footer .brand{color:#fff;margin-bottom:16px}
.site-footer .brand img{filter:brightness(0) invert(1);opacity:.95}
.site-footer p.desc{color:#9aa39e;font-size:14px;max-width:300px;line-height:1.75}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:18px;font-weight:700;position:relative;padding-bottom:10px}
.site-footer h4::after{content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;background:var(--green);border-radius:2px}
/* 快捷导航：分两列排布，整齐紧凑 */
.site-footer ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:11px 22px}
.site-footer ul a,.site-footer ul li{color:#aeb6b2;font-size:14px;transition:.2s}
.site-footer ul:not(.footer-contact) a{display:inline-flex;align-items:center;gap:7px}
.site-footer ul:not(.footer-contact) a::before{content:"›";color:var(--green);font-size:14px;line-height:1}
.site-footer ul a:hover{color:#fff}
/* 联系方式：单列显示 */
.site-footer .footer-contact{grid-template-columns:1fr;gap:13px}
.footer-contact li{display:flex;gap:9px;align-items:flex-start;line-height:1.65}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:42px;padding-top:22px;
  text-align:center;font-size:13px;color:#828b86}
.footer-bottom a{color:#8fae9b}
.footer-bottom a:hover{color:#fff}

/* ============ 返回顶部 ============ */
.to-top{position:fixed;right:22px;bottom:26px;width:46px;height:46px;border:none;border-radius:50%;
  background:var(--green);color:#fff;font-size:20px;line-height:1;cursor:pointer;z-index:70;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 20px rgba(77,138,96,.35);
  opacity:0;visibility:hidden;transform:translateY(12px);transition:.3s ease}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--green-deep)}
@media(max-width:560px){.to-top{right:16px;bottom:18px;width:42px;height:42px;font-size:18px}}

/* ============ 通用卡片网格 ============ */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}

/* 产品卡 */
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:.28s ease;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#cfe4d5}
.pcard .thumb{aspect-ratio:1/1;overflow:hidden;background:var(--green-mist)}
.pcard .thumb img{width:100%;height:100%;object-fit:cover;transition:.4s ease}
.pcard:hover .thumb img{transform:scale(1.05)}
.pcard .body{padding:18px 18px 20px}
.pcard .cat{font-size:12px;color:var(--green-deep);font-weight:600;margin-bottom:6px;
  background:var(--green-soft);display:inline-block;padding:3px 10px;border-radius:6px}
.pcard h3{font-size:16px;font-weight:700;line-height:1.5}
.pcard p{color:var(--muted);font-size:13px;margin-top:6px}

/* 特性卡 */
.fcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;
  transition:.28s ease}
.fcard:hover{box-shadow:var(--shadow-sm);border-color:#cfe4d5}
.fcard .fnum{font-size:14px;font-weight:800;color:var(--green);letter-spacing:1px}
.fcard h3{font-size:18px;margin:14px 0 8px;font-weight:700}
.fcard p{color:var(--muted);font-size:14px}

/* 相册 */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.gallery figure{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#fff;
  box-shadow:var(--shadow-sm)}
.gallery figure img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:.4s ease}
.gallery figure:hover img{transform:scale(1.05)}
.gallery figcaption{padding:12px 14px;font-size:14px;font-weight:600;color:var(--green-dark);text-align:center}

/* 徽标条 */
.badges{display:flex;gap:12px;flex-wrap:wrap}
.badges span{font-size:13px;background:var(--green-soft);color:var(--green-dark);
  padding:7px 15px;border-radius:8px;font-weight:600}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 20px;box-shadow:var(--shadow-sm)}
.stats .s{text-align:center}
.stats .s b{display:block;font-size:28px;color:var(--green-deep);font-weight:800}
.stats .s span{font-size:13px;color:var(--muted)}

/* 能力清单 */
.why-list{display:grid;gap:16px;margin-top:8px}
.why-list .it{display:flex;gap:14px;align-items:flex-start}
.why-list .it .ck{flex:0 0 auto;width:28px;height:28px;border-radius:8px;background:var(--green-soft);
  color:var(--green-deep);display:grid;place-items:center;font-weight:800;font-size:14px}
.why-list .it h4{font-size:16px;margin-bottom:2px}
.why-list .it p{color:var(--muted);font-size:14px}

/* 图文分栏 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split .media img{border-radius:var(--radius);box-shadow:var(--shadow-sm);width:100%;
  aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line)}

/* ============ 产品详情页 ============ */
.pd-hero{background:linear-gradient(180deg,var(--green-soft),var(--cream));padding:54px 0 46px;border-bottom:1px solid var(--line)}
.pd-hero .crumb{color:var(--muted);font-size:14px;margin-bottom:12px}
.pd-hero .crumb a:hover{color:var(--green-deep)}
.pd-hero h1{font-size:34px;font-weight:800;letter-spacing:-.3px}
.pd-hero .tag{display:inline-block;margin-top:12px;background:var(--green-soft);color:var(--green-deep);
  font-size:13px;font-weight:600;padding:5px 14px;border-radius:999px}
.pd-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:48px;align-items:start}
.pd-media img{width:100%;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-sm);background:#fff}
.pd-media .thumb-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
.pd-media .thumb-row img{border-radius:var(--radius-sm);aspect-ratio:1/1;object-fit:cover}
.pd-info h2{font-size:22px;margin:6px 0 14px}
.pd-info .lead{color:var(--muted);font-size:15px;line-height:1.8}
.pd-info .badges{margin:18px 0}
.pd-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.spec-table{width:100%;border-collapse:collapse;margin-top:10px;font-size:14px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.spec-table th,.spec-table td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:0}
.spec-table th{width:120px;background:var(--green-mist);color:var(--green-dark);font-weight:700}
.spec-table td{color:var(--ink)}
.app-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:8px}
.app-grid .it{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:16px 18px}
.app-grid .it .ck{flex:0 0 auto;width:26px;height:26px;border-radius:8px;background:var(--green-soft);
  color:var(--green-deep);display:grid;place-items:center;font-weight:800;font-size:13px}
.app-grid .it p{font-size:14px;color:var(--ink);line-height:1.6}
.related .grid-4 .pcard .body{padding:14px 16px}
.related .pcard h3{font-size:15px}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px;max-width:860px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.faq-item summary{padding:18px 22px;font-size:16px;font-weight:700;cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:14px;color:var(--green-dark)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .ar{transition:.25s;color:var(--green);font-size:20px;font-weight:700}
.faq-item[open] summary .ar{transform:rotate(45deg)}
.faq-item .ans{padding:0 22px 20px;color:var(--muted);font-size:15px;line-height:1.8}
.faq-cat{font-size:15px;font-weight:800;color:var(--green-deep);margin:34px 0 6px}

/* ============ 系列落地页 ============ */
.series-hero{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.series-hero .pic img{border-radius:var(--radius);box-shadow:var(--shadow-sm);width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line)}
.series-hero h1{font-size:36px;font-weight:800;letter-spacing:-.3px}
.series-hero .lead{color:var(--muted);font-size:16px;margin:16px 0 22px;line-height:1.8}
.pros{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:10px}
.pros .p{background:var(--green-mist);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px}
.pros .p b{display:block;color:var(--green-deep);font-size:15px;margin-bottom:4px}
.pros .p span{font-size:13px;color:var(--muted)}

/* ============ 响应式 ============ */
@media(max-width:900px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .nav-menu{position:fixed;inset:70px 0 auto 0;background:var(--cream);flex-direction:column;
    gap:0;padding:8px 22px 18px;border-bottom:1px solid var(--line);display:none;box-shadow:var(--shadow-sm)}
  .nav-menu.open{display:flex}
  .nav-menu a{padding:13px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .title{font-size:26px}
  .page-hero h1{font-size:28px}
  .stats{grid-template-columns:repeat(2,1fr);gap:22px}
  .pd-grid,.series-hero,.split{grid-template-columns:1fr;gap:30px}
  .app-grid,.pros{grid-template-columns:1fr}
  .pd-hero h1{font-size:28px}
  .series-hero h1{font-size:30px}
}
@media(max-width:560px){
  .grid-2,.grid-3,.grid-4,.gallery{grid-template-columns:1fr}
  .section{padding:56px 0}
  .pd-media .thumb-row{grid-template-columns:repeat(3,1fr)}
}