/* ===== 康瑞健 × 0号·太合汤 设计系统 v2（贴合产品金棕色调 #A16207） ===== */
:root{
  --c-brown:#3a2418;
  --c-brown-dark:#271710;
  --c-cream:#FFFDF8;
  --c-cream-2:#F4ECDC;
  --c-gold:#A16207;
  --c-gold-light:#C98A2E;
  --c-gold-soft:#E7CBA0;
  --c-text:#2B2018;
  --c-muted:#6E6356;
  --c-white:#fffdfa;
  --shadow:0 10px 30px rgba(58,36,24,.12);
  --radius:14px;
  --maxw:1160px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,"Segoe UI",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--c-text);background:var(--c-cream);line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{padding:74px 0}

/* ===== 导航 ===== */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;transition:all .3s ease;background:transparent}
.navbar.scrolled{background:rgba(39,23,16,.96);box-shadow:0 4px 20px rgba(0,0,0,.18)}
.navbar__inner{max-width:var(--maxw);margin:0 auto;padding:10px 22px;display:flex;align-items:center;justify-content:space-between}
.navbar__logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--c-white);letter-spacing:.5px}
.navbar__logo-icon{display:inline-flex;width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--c-gold),var(--c-gold-light));color:#fffdfa;align-items:center;justify-content:center;font-weight:900}
.navbar__logo-img{height:34px;width:34px;border-radius:9px;display:block;flex-shrink:0;box-shadow:0 2px 8px rgba(161,98,7,.35)}
.footer__logo-img{height:32px;width:32px;border-radius:8px;display:block;flex-shrink:0}
.navbar__menu{display:flex;gap:24px;list-style:none;align-items:center}
.navbar__link{color:var(--c-cream);font-size:15px;font-weight:500;position:relative;padding:6px 0;transition:color .2s}
.navbar.scrolled .navbar__link{color:#f3e9d8}
.navbar__link:hover{color:var(--c-gold-light)}
.navbar__link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--c-gold);transition:width .25s}
.navbar__link:hover::after{width:100%}
.navbar__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.navbar__toggle span{width:26px;height:2px;background:var(--c-white);border-radius:2px;transition:.3s}

/* ===== 导航下拉菜单 ===== */
.navbar__dropdown{position:relative}
.navbar__dropbtn{display:inline-flex;align-items:center;gap:3px;cursor:pointer}
.navbar__dropbtn::after{content:"";display:inline-block;width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;vertical-align:middle;transition:transform .25s;margin-top:2px}
.navbar__dropdown:hover .navbar__dropbtn::after{transform:rotate(180deg)}
.navbar__dropdown-menu{display:none !important;position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%);min-width:140px;background:rgba(39,23,16,.97);border-radius:10px;box-shadow:0 8px 28px rgba(0,0,0,.35);padding:6px 0;z-index:1001;border:1px solid rgba(161,98,7,.25);opacity:0;pointer-events:none;transition:opacity .18s, visibility .18s}
.navbar__dropdown:hover .navbar__dropdown-menu{display:block !important;animation:navDropIn .18s ease forwards;opacity:1;pointer-events:auto;visibility:visible}
.navbar__dropdown-menu a{display:block;padding:9px 22px;color:#f3e9d8;font-size:14px;font-weight:400;transition:background .15s,color .15s;text-decoration:none;white-space:nowrap}
.navbar__dropdown-menu a:hover{background:rgba(161,98,7,.2);color:var(--c-gold-light)}

@keyframes navDropIn{from{opacity:0;transform:translateX(-50%) translateY(-6px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}

/* ===== 移动端下拉适配 ===== */
@media(max-width:768px){
  .navbar__dropdown-menu{display:none !important;position:static;background:rgba(255,253,248,.06);box-shadow:none;border-radius:0;border:none;border-top:1px solid rgba(161,98,7,.15);padding:4px 0 4px 20px;transform:none;opacity:1;pointer-events:auto;visibility:visible}
  .navbar__dropdown.active .navbar__dropdown-menu{display:block !important;animation:none}
  .navbar__dropdown-menu a{color:#f3e9d8;padding:8px 12px 8px 0;font-size:14px}
}

/* ===== Hero ===== */
.hero{position:relative;min-height:560px;display:flex;align-items:center;color:var(--c-white);
  background:radial-gradient(120% 120% at 80% 0%,#5a3220 0%,var(--c-brown) 45%,var(--c-brown-dark) 100%)}
.hero::after{content:"";position:absolute;inset:0;background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='40' height='40'><circle cx='2' cy='2' r='1' fill='%23ffffff' opacity='0.05'/></svg>") repeat}
.hero .container{position:relative;z-index:2;padding-top:90px}
.hero__badge{display:inline-block;padding:6px 16px;border:1px solid var(--c-gold-light);border-radius:999px;color:var(--c-gold-soft);font-size:13px;letter-spacing:2px;margin-bottom:20px}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;margin-bottom:18px}
.hero p{font-size:18px;max-width:640px;color:#ecdcc8;margin-bottom:30px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;transition:.25s;border:0}
.btn--gold{background:linear-gradient(135deg,var(--c-gold),var(--c-gold-light));color:#fffdfa}
.btn--gold:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(161,98,7,.4)}
.btn--ghost{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff}
.btn--ghost:hover{border-color:var(--c-gold-light);color:var(--c-gold-soft)}

/* ===== 通用区块 ===== */
.section--light{background:var(--c-cream)}
.section--dark{background:var(--c-brown);color:var(--c-cream)}
.section__head{text-align:center;max-width:760px;margin:0 auto 46px}
.section__eyebrow{color:var(--c-gold);font-weight:700;letter-spacing:3px;font-size:13px;text-transform:uppercase}
.section__title{font-size:34px;font-weight:800;margin:10px 0 14px;color:var(--c-brown)}
.section--dark .section__title{color:var(--c-white)}
.section__sub{color:var(--c-muted);font-size:16px}
.section--dark .section__sub{color:#d9c9b6}

/* ===== 卡片 ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:46px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:46px}
.grid-5{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin-top:46px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;margin-top:40px}
.card{background:var(--c-white);border-radius:var(--radius);padding:32px 28px;box-shadow:var(--shadow);border:1px solid var(--c-cream-2)}
.card__icon{width:52px;height:52px;border-radius:12px;background:linear-gradient(135deg,var(--c-gold),var(--c-gold-light));color:#fffdfa;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:18px}
.card h3{font-size:20px;margin-bottom:10px;color:var(--c-brown)}
.card p{color:var(--c-muted);font-size:15px}
.card--gold{background:linear-gradient(160deg,var(--c-brown),var(--c-brown-dark));color:#f3e9d8;border:0}
.card--gold h3{color:#fff}
.card--gold p{color:#d9c9b6}
.card--gold .card__icon{background:linear-gradient(135deg,var(--c-gold-light),var(--c-gold-soft));color:var(--c-brown-dark)}

/* ===== 参数条 ===== */
.band{background:linear-gradient(135deg,var(--c-gold),var(--c-gold-light));color:#fffdfa;border-radius:var(--radius);padding:34px 30px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;margin-top:40px}
.band__num{font-size:38px;font-weight:800;line-height:1}
.band__label{font-size:14px;margin-top:8px;opacity:.95}

/* ===== 引言 ===== */
.lead{font-size:19px;line-height:1.9;color:var(--c-text);max-width:880px;margin:0 auto;text-align:center}
.lead strong{color:var(--c-gold)}

/* ===== 配方模块 ===== */
.module{background:var(--c-white);border:1px solid var(--c-cream-2);border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow);margin-bottom:22px}
.module__tag{display:inline-block;padding:4px 14px;border-radius:999px;background:var(--c-cream-2);color:var(--c-gold);font-weight:700;font-size:13px;margin-bottom:12px}
.module h3{font-size:22px;color:var(--c-brown);margin-bottom:8px}
.module > p{color:var(--c-muted);font-size:15px;margin-bottom:16px}
.herb{display:flex;gap:14px;padding:12px 0;border-top:1px dashed var(--c-cream-2)}
.herb__name{font-weight:700;color:var(--c-brown);min-width:88px;flex-shrink:0}
.herb__name small{display:block;font-weight:500;color:var(--c-gold);font-size:12px}
.herb__desc{color:var(--c-muted);font-size:14px}

/* ===== 专利 ===== */
.patent{background:var(--c-cream-2);border-left:4px solid var(--c-gold);border-radius:10px;padding:20px 22px;margin-bottom:16px}
.patent b{color:var(--c-brown)}
.patent .no{color:var(--c-gold);font-weight:700;font-size:14px}

/* ===== 联系 ===== */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.contact-list{list-style:none;display:flex;flex-direction:column;gap:18px}
.contact-list li{display:flex;align-items:flex-start;gap:14px;font-size:16px}
.contact-list .ic{width:42px;height:42px;border-radius:10px;background:var(--c-cream-2);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.contact-list b{display:block;color:var(--c-brown);font-size:14px;margin-bottom:2px}
.contact-list a:hover{color:var(--c-gold)}
.map-box{height:300px;border-radius:var(--radius);background:var(--c-cream-2);display:flex;align-items:center;justify-content:center;color:var(--c-muted);font-size:14px;border:1px dashed var(--c-gold)}

/* ===== 列表 ===== */
.tick{list-style:none;display:flex;flex-direction:column;gap:12px}
.tick li{padding-left:26px;position:relative;color:var(--c-muted);font-size:15px}
.tick li::before{content:"✓";position:absolute;left:0;top:0;color:var(--c-gold);font-weight:800}

/* ===== 页脚 ===== */
.footer{background:var(--c-brown-dark);color:#e9dccb;padding:54px 0 26px}
.footer__grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}
.footer__brand{font-size:22px;font-weight:800;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer__brand .navbar__logo-icon{background:linear-gradient(135deg,var(--c-gold),var(--c-gold-light));color:#fffdfa}
.footer p{font-size:14px;color:#cbb9a6;line-height:1.8}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:1px}
.footer ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer ul a{color:#cbb9a6;font-size:14px}
.footer ul a:hover{color:var(--c-gold-light)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:20px;text-align:center;font-size:13px;color:#a8907d}

/* ===== 页脚微信二维码 ===== */
.footer__qrcode{margin-top:14px;padding:12px;background:rgba(255,253,248,.06);border-radius:10px;text-align:center;border:1px solid rgba(161,98,7,.15)}
.footer__qrcode img{width:100px;height:100px;border-radius:6px;display:block;margin:0 auto 6px}
.footer__qrcode span{display:block;font-size:12px;color:var(--c-gold-light);letter-spacing:.5px}

/* ===== 右侧悬浮微信按钮 ===== */
.wechat-float{position:fixed;right:24px;bottom:32px;z-index:999}
.wechat-float__btn{width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,#07C160,#06AD56);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 16px rgba(7,193,96,.35);transition:transform .2s,box-shadow .2s}
.wechat-float__btn:hover{transform:scale(1.08);box-shadow:0 6px 22px rgba(7,193,96,.45)}
.wechat-float__popup{position:absolute;right:64px;bottom:4px;width:156px;background:#fff;border-radius:12px;padding:14px;text-align:center;box-shadow:0 8px 30px rgba(0,0,0,.16);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(8px) scale(.96);transition:all .22s ease;border:1px solid #f0f0f0}
.wechat-float__popup::after{content:'';position:absolute;right:-8px;bottom:20px;width:0;height:0;border-left:8px solid #fff;border-top:8px solid transparent;border-bottom:8px solid transparent}
.wechat-float:hover .wechat-float__popup,
.wechat-float__btn:focus+.wechat-float__popup{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0) scale(1)}
.wechat-float__popup img{width:120px;height:120px;border-radius:8px;display:block;margin:0 auto 8px}
.wechat-float__popup span{font-size:12px;color:#666;font-weight:500}

/* ===== FAQ 手风琴 ===== */
.faq{background:var(--c-white);border:1px solid var(--c-cream-2);border-radius:12px;padding:0 22px;margin-bottom:14px;box-shadow:var(--shadow)}
.faq summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:700;font-size:17px;color:var(--c-brown);display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--c-gold);font-weight:700}
.faq[open] summary::after{content:"\2212"}
.faq__a{padding:0 0 20px;color:var(--c-muted);font-size:15px;line-height:1.85}

/* ===== 文章卡 ===== */
.article-meta{color:var(--c-gold);font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:8px}
.article-card p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ===== 响应式 ===== */
@media (max-width:860px){
  .navbar__menu{position:fixed;top:64px;right:0;flex-direction:column;background:var(--c-brown);width:220px;padding:18px 22px;gap:14px;transform:translateX(120%);transition:transform .3s;box-shadow:-10px 10px 30px rgba(0,0,0,.3)}
  .navbar__menu.open{transform:translateX(0)}
  .navbar__toggle{display:flex}
  .hero h1{font-size:34px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .band{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .contact-wrap{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr}
  section{padding:54px 0}
  .wechat-float{right:16px;bottom:20px}
  .wechat-float__btn{width:46px;height:46px}
  .wechat-float__popup{right:56px;bottom:-4px;width:140px;padding:10px}
  .wechat-float__popup img{width:100px;height:100px}
}