/* ============================================================
   四季娃娃官网 · 站点样式
   配色依据：简简云润霜包装设计
   ============================================================ */

/* ============ 顶部导航 C01 ============ */
.nav{position:sticky;top:0;z-index:100;background:rgba(251,249,244,.93);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:32px;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text-strong);
  font-size:17px;letter-spacing:.5px;flex-shrink:0}
.logo img{width:36px;height:36px;border-radius:50%;object-fit:cover}
.nav-links{display:flex;gap:2px;margin-left:auto;align-items:center}
.nav-links a{position:relative;padding:8px 14px;border-radius:8px;font-size:15px;
  color:var(--text);transition:color var(--t-fast),background var(--t-fast)}
.nav-links a:hover{color:var(--text-strong);background:var(--primary-soft)}
.nav-links a.active{color:var(--primary-deep);background:var(--primary-soft);font-weight:600}
.nav-links a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;background:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:8px;margin-left:12px}
.nav-btn{height:38px;padding:0 16px;border-radius:8px;border:none;background:transparent;
  color:var(--text);font-size:14px;cursor:pointer;font-family:inherit;transition:background var(--t-fast)}
.nav-btn:hover{background:var(--primary-soft)}
.nav-btn-search{width:38px;padding:0}
@media(max-width:900px){
  .nav-in{height:64px;gap:12px}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:var(--bg);border-bottom:1px solid var(--line);padding:12px;gap:2px}
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:14px}
  .nav-actions{margin-left:auto}
}
.burger{display:none;width:40px;height:40px;border:none;background:transparent;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:var(--text-strong);border-radius:2px}
@media(max-width:900px){.burger{display:flex}}

/* ============ 页脚 C14 ============ */
.footer{background:var(--bg-soft);padding:56px 0 32px;margin-top:0;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer h4{font-size:14px;color:var(--text-strong);margin-bottom:16px;letter-spacing:1px}
.footer ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer a{font-size:14px;color:var(--text-mute);transition:color var(--t-fast)}
.footer a:hover{color:var(--primary-deep)}
.footer-brand p{font-size:14px;color:var(--text-mute);margin-top:12px;max-width:320px;line-height:1.8}
.footer-bottom{border-top:1px solid var(--line);padding-top:24px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{font-size:13px;color:var(--text-faint)}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}

/* ============ 首屏 Hero C02 ============ */
.hero{min-height:560px;display:flex;align-items:center;position:relative;overflow:hidden;
  padding:80px 0;background:linear-gradient(180deg,var(--bg) 0%,var(--bg-cream) 100%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.hero h1{margin-bottom:20px}
.hero p.lead{font-size:18px;color:var(--text-mute);margin-bottom:32px;max-width:520px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-arc{position:absolute;border-radius:50%;border:2px solid var(--primary);opacity:.45}
.hero-arc.a1{width:420px;height:420px;right:-120px;top:-40px}
.hero-arc.a2{width:300px;height:300px;right:-60px;top:20px;opacity:.28;border-color:var(--gold)}
.product-float{position:relative;z-index:2;display:flex;justify-content:center;align-items:center}
.product-float img{width:100%;max-width:420px;filter:drop-shadow(0 24px 40px rgba(35,37,39,.16))}
@media(max-width:900px){
  .hero{min-height:auto;padding:56px 0}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-arc{display:none}
}

/* ============ 价值卡片 C03 ============ */
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.value-card{transition:transform var(--t-mid),box-shadow var(--t-mid);
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-m);
  padding:32px 28px}
.value-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-pop);border-color:var(--primary-soft)}
.value-num{font-size:13px;color:var(--primary-deep);letter-spacing:2px;margin-bottom:12px;font-weight:700}
.value-card h3{margin-bottom:10px}
@media(max-width:768px){.value-grid{grid-template-columns:1fr}}

/* ============ 区块标题 ============ */
.sec-head{text-align:center;max-width:640px;margin:0 auto 48px}
.sec-head h2{margin-bottom:12px}
.sec-head p{color:var(--text-mute)}

/* ============ 信任信息区 C15 ============ */
.trust-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:32px}
.trust-item{display:flex;align-items:flex-start;gap:14px;padding:24px;border-radius:var(--r-m);
  background:var(--primary-pale);border:1px solid rgba(127,178,154,.18)}
.trust-item.gold{background:var(--gold-soft);border-color:rgba(184,146,46,.2)}
.trust-item .ic{width:44px;height:44px;border-radius:11px;background:var(--primary);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:19px;flex-shrink:0}
.trust-item.gold .ic{background:var(--gold)}
.trust-item h4{font-size:15px;margin-bottom:4px;color:var(--text-strong)}
.trust-item p{font-size:13px;color:var(--text-mute)}
@media(max-width:768px){.trust-row{grid-template-columns:1fr}}

/* ============ 面包屑 / 内页头部 ============ */
.page-head{padding:64px 0 40px;border-bottom:1px solid var(--line);margin-bottom:48px}
.crumb{display:flex;gap:8px;font-size:13px;color:var(--text-faint);margin-bottom:16px;flex-wrap:wrap}
.crumb a:hover{color:var(--text-strong)}
.crumb span{color:var(--text-faint)}
.page-head h1{margin-bottom:12px}
.page-head .desc{color:var(--text-mute);max-width:680px}

.split-2{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-2+.split-2{margin-top:80px}
@media(max-width:900px){.split-2{grid-template-columns:1fr;gap:32px}}

/* ============ 信息列表（键值对） ============ */
.info-list{list-style:none;display:flex;flex-direction:column;gap:0}
.info-list li{display:flex;justify-content:space-between;gap:16px;padding:16px 0;
  border-bottom:1px dashed var(--line);font-size:15px}
.info-list li:last-child{border-bottom:none}
.info-list dt{color:var(--text-mute);flex-shrink:0;width:120px}
.info-list dd{color:var(--text);text-align:right;flex:1}

/* ============ 时间轴 C10 ============ */
.timeline{list-style:none;position:relative;padding-left:32px}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;
  background:var(--line)}
.timeline li{position:relative;padding-bottom:28px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:-29px;top:6px;width:16px;height:16px;
  border-radius:50%;background:var(--primary);box-shadow:0 0 0 4px var(--bg)}
.timeline .t-when{font-size:13px;color:var(--primary-deep);margin-bottom:4px;font-weight:600}
.timeline .t-what{font-size:15px;color:var(--text-strong)}
.timeline .t-desc{font-size:14px;color:var(--text-mute);margin-top:4px}

/* ============ 问答 C09 ============ */
.qa-item{border-bottom:1px solid var(--line)}
.qa-q{width:100%;text-align:left;background:none;border:none;padding:24px 0;cursor:pointer;
  font-family:inherit;font-size:17px;font-weight:600;color:var(--text-strong);
  display:flex;justify-content:space-between;align-items:center;gap:16px}
.qa-q .sign{width:28px;height:28px;border-radius:50%;background:var(--primary-soft);
  color:var(--primary-deep);display:flex;align-items:center;justify-content:center;
  font-size:18px;flex-shrink:0;transition:transform var(--t-fast),background var(--t-fast)}
.qa-item.open .sign{background:var(--primary);color:#fff;transform:rotate(45deg)}
.qa-a{overflow:hidden;max-height:0;transition:max-height var(--t-mid)}
.qa-a-inner{padding:0 0 24px;color:var(--text-mute);font-size:15px;max-width:820px}

/* ============ 备案公示表格 ============ */
.public-table{width:100%;border-collapse:collapse;font-size:15px}
.public-table tr{border-bottom:1px solid var(--line)}
.public-table th{text-align:left;width:180px;padding:14px 16px 14px 0;color:var(--text-mute);
  font-weight:500;vertical-align:top;font-size:14px}
.public-table td{padding:14px 0;color:var(--text)}
.ingredient-table{width:100%;border-collapse:collapse;font-size:14px;margin-top:8px}
.ingredient-table th{background:var(--primary-pale);padding:12px 14px;text-align:left;
  font-size:13px;color:var(--primary-deep);font-weight:600}
.ingredient-table td{padding:12px 14px;border-bottom:1px solid var(--line);color:var(--text)}
.ingredient-table tr:nth-child(even) td{background:rgba(251,249,244,.7)}
.ingredient-table tr:hover td{background:var(--primary-soft)}

.notice-box{background:var(--gold-soft);border-left:3px solid var(--gold);padding:20px 24px;
  border-radius:0 var(--r-m) var(--r-m) 0;font-size:14px;color:#7A6532;margin-top:32px}

/* ============ 购买与服务页：小程序码区块 ============ */
.qrcode-block{display:flex;gap:40px;align-items:center;background:var(--bg-card);
  border:1px solid var(--line);border-radius:var(--r-l);padding:40px;flex-wrap:wrap}
.qrcode-block .qr-img{width:180px;height:180px;flex-shrink:0;border-radius:var(--r-m);
  border:1px solid var(--line);padding:12px;background:#fff}
.qrcode-block .qr-img img{width:100%;height:100%;object-fit:contain}
.qrcode-block .qr-text h3{margin-bottom:12px}
.qrcode-block .qr-text p{color:var(--text-mute);font-size:15px;max-width:420px}
.qrcode-block .qr-steps{display:flex;gap:24px;margin-top:20px}
.qrcode-block .qr-steps .step{text-align:center}
.qrcode-block .qr-steps .step .n{width:32px;height:32px;border-radius:50%;background:var(--primary);
  color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 8px;font-size:14px;font-weight:600}
@media(max-width:768px){.qrcode-block{padding:28px}.qrcode-block .qr-steps{flex-wrap:wrap;gap:12px}}

/* ============ 文章列表 ============ */
.article-list{display:flex;flex-direction:column;gap:0}
.article-item{padding:28px 0;border-bottom:1px solid var(--line)}
.article-item:first-child{padding-top:0}
.article-item h3{margin-bottom:8px}
.article-item .meta{font-size:13px;color:var(--text-faint);margin-bottom:10px}
.article-item p{color:var(--text-mute);font-size:15px}
.article-item a:hover h3{color:var(--primary-deep)}

/* ============ 交替区块底色 ============ */
.bg-cream{background:var(--bg-cream)}
.bg-soft{background:var(--bg-soft)}