/* ============================================================
   HKSafran Chemicals - B2B 化学品外贸独立站
   风格：黑白冷色系 | 简洁专业 | 全站响应式
   配色：炭黑 #111 / 冷蓝强调 #2978b5 / 浅灰 #f4f6f8
   ============================================================ */
*{margin:0;padding:0;box-sizing:border-box;}
:root{
    --black:#111111;
    --dark:#1d1f21;
    --text:#3d434a;
    --muted:#6b7280;
    --light:#f4f6f8;
    --line:#e5e9ed;
    --white:#ffffff;
    --accent:#2978b5;
    --accent-dark:#1f5e8c;
    --wa:#25D366;
}
html{scroll-behavior:smooth;}
body{
    font-family:'Segoe UI',Roboto,'Helvetica Neue',Arial,'PingFang SC','Microsoft YaHei',sans-serif;
    color:var(--text);
    background:var(--white);
    line-height:1.65;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
img{max-width:100%;display:block;}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--black);color:#cfd4da;font-size:13px;}
.topbar .container{display:flex;justify-content:space-between;align-items:center;padding:7px 20px;}
.topbar a{color:#cfd4da;transition:.2s;}
.topbar a:hover{color:#fff;}
.topbar .lang-switch{display:flex;gap:8px;align-items:center;}

/* ---------- 导航栏 ---------- */
.site-header{
    background:var(--white);
    border-bottom:1px solid var(--line);
    position:sticky;top:0;z-index:999;
    box-shadow:0 1px 6px rgba(0,0,0,.04);
}
.header-wrap{display:flex;justify-content:space-between;align-items:center;height:72px;}
.logo{font-size:1.45rem;font-weight:700;color:var(--black);letter-spacing:.3px;}
.logo span{color:var(--accent);}
.nav-links{display:flex;gap:30px;align-items:center;}
.nav-links a{color:var(--text);font-weight:500;position:relative;padding:6px 0;transition:.2s;}
.nav-links a:hover,.nav-links a.active{color:var(--accent);}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--accent);transition:.25s;}
.nav-links a:hover::after,.nav-links a.active::after{width:100%;}
.nav-cta{padding:9px 18px;background:var(--accent);color:#fff!important;border-radius:4px;font-weight:600;}
.nav-cta:hover{background:var(--accent-dark);}
.nav-cta::after{display:none;}
.nav-toggle{display:none;font-size:26px;color:var(--black);cursor:pointer;}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:12px 28px;background:var(--accent);color:#fff;border:none;border-radius:4px;font-weight:600;font-size:15px;cursor:pointer;transition:.25s;text-align:center;}
.btn:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(41,120,181,.25);}
.btn-outline{background:transparent;color:var(--accent);border:1.5px solid var(--accent);}
.btn-outline:hover{background:var(--accent);color:#fff;}
.btn-wa{background:var(--wa);}
.btn-wa:hover{background:#1eb958;box-shadow:0 4px 12px rgba(37,211,102,.3);}
.btn-lg{padding:14px 34px;font-size:16px;}

/* ---------- 轮播/Hero ---------- */
.hero{
    position:relative;height:560px;color:#fff;
    background:linear-gradient(rgba(0,0,0,.72),rgba(0,0,0,.55)),url('../assets/hero.jpg') center/cover;
    display:flex;align-items:center;text-align:center;
}
.hero-content{width:100%;}
.hero-badge{display:inline-block;background:rgba(41,120,181,.9);color:#fff;font-size:13px;letter-spacing:1px;padding:6px 14px;border-radius:20px;margin-bottom:18px;text-transform:uppercase;}
.hero h1{font-size:2.9rem;font-weight:700;margin-bottom:16px;line-height:1.2;}
.hero p{font-size:1.15rem;max-width:720px;margin:0 auto 30px;color:#e7eaee;}
.hero .btn-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.hero-dots{position:absolute;bottom:24px;left:0;right:0;display:flex;justify-content:center;gap:8px;}
.hero-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;}
.hero-dots span.on{background:var(--accent);}

/* ---------- 区块通用 ---------- */
.section{padding:78px 0;}
.section--gray{background:var(--light);}
.section--dark{background:var(--dark);color:#fff;}
.section-title{text-align:center;margin-bottom:52px;}
.section-title .tag{display:inline-block;color:var(--accent);font-weight:700;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:10px;}
.section-title h2{font-size:2rem;color:var(--black);font-weight:700;}
.section--dark .section-title h2{color:#fff;}
.section-title p{color:var(--muted);max-width:640px;margin:12px auto 0;font-size:15px;}
.section--dark .section-title p{color:#b9bfc6;}

/* ---------- 三大优势 ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;}
.adv-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:34px 26px;text-align:center;transition:.25s;}
.adv-card:hover{transform:translateY(-4px);box-shadow:0 8px 22px rgba(0,0,0,.07);border-color:var(--accent);}
.adv-icon{width:64px;height:64px;margin:0 auto 18px;border-radius:50%;background:var(--light);display:flex;align-items:center;justify-content:center;font-size:28px;color:var(--accent);}
.adv-card h3{color:var(--black);font-size:1.15rem;margin-bottom:10px;}
.adv-card p{color:var(--muted);font-size:14.5px;}

/* ---------- 产品网格/卡片 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:center;margin-bottom:38px;background:#fff;border:1px solid var(--line);padding:16px 20px;border-radius:8px;}
.filter-bar select,.filter-bar input{padding:10px 14px;border:1px solid var(--line);border-radius:4px;font-size:14.5px;background:#fff;color:var(--text);}
.filter-bar input{width:240px;}
.filter-bar label{font-size:14px;color:var(--text);font-weight:600;}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:26px;}
.proc-overview{background:var(--dark);color:#fff;border-radius:10px;padding:30px 30px 26px;margin-bottom:38px;}
.proc-overview .tag{color:var(--accent);}
.proc-overview h3{color:#fff;font-size:1.5rem;margin-bottom:6px;}
.proc-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:20px;}
.proc-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:18px;transition:.2s;}
.proc-card:hover{background:rgba(255,255,255,.12);transform:translateY(-2px);}
.proc-card h4{font-size:15px;color:#fff;margin:0 0 8px;}
.proc-card p{font-size:12.5px;color:#b9bfc6;line-height:1.6;margin:0;}
@media(max-width:900px){.proc-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:560px){.proc-grid{grid-template-columns:1fr;}}
.product-card{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;transition:.25s;display:flex;flex-direction:column;}
.product-card:hover{box-shadow:0 8px 22px rgba(0,0,0,.08);transform:translateY(-3px);border-color:#cfd8e0;}
.product-card .img-wrap{height:200px;overflow:hidden;background:var(--light);}
.product-card .img-wrap img{width:100%;height:100%;object-fit:cover;transition:.4s;}
.product-card:hover .img-wrap img{transform:scale(1.05);}
.product-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.product-body .cat-tag{font-size:12px;color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px;}
.product-body .proc-tag{display:inline-block;font-size:11px;font-weight:600;color:#1f5e8c;background:#e8f1f8;border:1px solid #cfe0ee;padding:3px 9px;border-radius:20px;margin-bottom:8px;letter-spacing:.3px;}
.product-body h3{color:var(--black);font-size:1.1rem;margin-bottom:8px;}
.product-body .spec{color:var(--muted);font-size:13.5px;margin-bottom:14px;flex:1;}
.product-body .row{display:flex;gap:10px;}
.product-body .btn{flex:1;padding:10px 12px;font-size:14px;}

/* ---------- 关于 ---------- */
.about-wrap{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;align-items:center;}
.about-img{border-radius:8px;overflow:hidden;box-shadow:0 10px 30px rgba(0,0,0,.1);}
.about-img img{width:100%;height:100%;object-fit:cover;}
.about-text h3{color:var(--black);font-size:1.4rem;margin-bottom:14px;}
.about-text p{color:var(--muted);margin-bottom:14px;}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:22px 0;}
.stat{text-align:center;background:var(--light);border-radius:8px;padding:18px 10px;}
.stat b{display:block;font-size:1.6rem;color:var(--accent);}
.stat span{font-size:13px;color:var(--muted);}
.cert-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.cert-tag{padding:7px 14px;background:#eef3f7;color:var(--accent);border:1px solid #d7e4ee;border-radius:4px;font-size:13px;font-weight:600;}

/* ---------- 客户见证 ---------- */
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.testimonial-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:28px;position:relative;}
.testimonial-card::before{content:"\201C";font-size:52px;color:var(--accent);position:absolute;top:6px;left:22px;opacity:.5;line-height:1;}
.testimonial-card p:first-of-type{color:var(--text);font-size:14.5px;margin:18px 0 16px;font-style:italic;}
.testimonial-card .who{display:flex;align-items:center;gap:12px;}
.testimonial-card .who .avatar{width:42px;height:42px;border-radius:50%;background:var(--light);display:flex;align-items:center;justify-content:center;color:var(--accent);font-weight:700;}
.testimonial-card .who b{display:block;color:var(--black);font-size:14px;}
.testimonial-card .who span{font-size:12.5px;color:var(--muted);}

/* ---------- 报价CTA ---------- */
.cta{background:linear-gradient(120deg,var(--dark),#0d1117);color:#fff;text-align:center;}
.cta h2{font-size:1.9rem;margin-bottom:14px;}
.cta p{color:#b9bfc6;max-width:620px;margin:0 auto 30px;}
.cta .btn-row{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;}

/* ---------- 表单 ---------- */
.form-panel{background:#fff;border:1px solid var(--line);border-radius:10px;padding:38px;box-shadow:0 10px 30px rgba(0,0,0,.05);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.form-group{margin-bottom:20px;}
.form-group label{display:block;margin-bottom:7px;color:var(--black);font-weight:600;font-size:14px;}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:5px;font-size:15px;font-family:inherit;color:var(--text);background:#fbfcfd;transition:.2s;}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(41,120,181,.12);}
.form-group textarea{min-height:130px;resize:vertical;}
.form-group .hint{font-size:12.5px;color:var(--muted);margin-top:6px;}
.form-file{border:2px dashed var(--line);border-radius:6px;padding:22px;text-align:center;color:var(--muted);cursor:pointer;transition:.2s;background:#fbfcfd;}
.form-file:hover{border-color:var(--accent);color:var(--accent);}
.form-file input{display:none;}

/* ---------- 联系信息 ---------- */
.contact-info-card{background:var(--dark);color:#fff;border-radius:10px;padding:34px;height:100%;}
.contact-info-card h3{font-size:1.3rem;margin-bottom:20px;}
.contact-info-card .item{display:flex;gap:14px;margin-bottom:18px;align-items:flex-start;}
.contact-info-card .item .ic{width:40px;height:40px;flex-shrink:0;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;font-size:18px;}
.contact-info-card .item b{display:block;font-size:14px;color:#aeb4bb;font-weight:500;}
.contact-info-card .item a,.contact-info-card .item span{color:#fff;font-size:15px;font-weight:600;}
.promise-box{background:var(--accent);color:#fff;border-radius:8px;padding:18px 22px;margin-top:8px;display:flex;align-items:center;gap:12px;font-size:14.5px;}

/* ---------- 地图 ---------- */
.map-box{border-radius:10px;overflow:hidden;border:1px solid var(--line);min-height:320px;background:var(--light);}

/* ---------- WhatsApp 悬浮 ---------- */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:998;background:#0f1220;color:#fff;width:56px;height:56px;border-radius:50%;overflow:hidden;display:flex;align-items:center;justify-content:center;font-size:28px;box-shadow:0 6px 18px rgba(0,0,0,.25);transition:.25s;}
.wa-float:hover{transform:scale(1.08);}
.wa-float span{display:none;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--black);color:#aeb4bb;padding:56px 0 0;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:36px;padding-bottom:40px;}
.footer-grid h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer-grid .brand{font-size:1.2rem;color:#fff;font-weight:700;margin-bottom:12px;}
.footer-grid p{line-height:1.7;}
.footer-grid ul li{margin-bottom:9px;}
.footer-grid ul a{color:#aeb4bb;transition:.2s;}
.footer-grid ul a:hover{color:var(--accent);}
.footer-bottom{border-top:1px solid #2a2d31;padding:18px 0;text-align:center;font-size:12.5px;color:#7d848c;}

/* ---------- 响应式 ---------- */
@media(max-width:992px){
    .footer-grid{grid-template-columns:1fr 1fr;}
    .about-wrap{grid-template-columns:1fr;gap:36px;}
}
@media(max-width:768px){
    .hero{height:480px;}
    .hero h1{font-size:2.1rem;}
    .hero p{font-size:1rem;}
    .nav-toggle{display:block;}
    .nav-links{
        position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;
        gap:0;padding:0 20px;box-shadow:0 10px 20px rgba(0,0,0,.1);max-height:0;overflow:hidden;transition:max-height .3s;
    }
    .nav-links.open{max-height:420px;padding:12px 20px;}
    .nav-links a{padding:13px 0;border-bottom:1px solid var(--line);width:100%;}
    .nav-cta{width:100%;text-align:center;margin-top:8px;}
    .adv-grid,.testimonial-grid{grid-template-columns:1fr;}
    .form-row{grid-template-columns:1fr;}
    .filter-bar input{width:100%;}
    .stats{grid-template-columns:repeat(3,1fr);}
    .topbar .container{flex-direction:column;gap:4px;}
    .section{padding:56px 0;}
    .section-title h2{font-size:1.6rem;}
}
@media(max-width:480px){
    .hero h1{font-size:1.7rem;}
    .footer-grid{grid-template-columns:1fr;}
}

/* ============ 排版整齐优化 ============ */
.adv-card,.testimonial-card{display:flex;flex-direction:column;}
.testimonial-card .who{margin-top:auto;}
.product-body .row{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.stat{display:flex;flex-direction:column;justify-content:center;}
.adv-card p,.testimonial-card p:first-of-type{flex:1;}
/* 统一表单输入框高度与间距 */
.form-group label{display:block;text-align:left;}
/* 页脚链接行高统一 */
.footer-grid ul li{line-height:1.5;}
/* 内联SVG图标尺寸：跟随容器字体大小 */
.adv-icon svg,.ic svg,.wa-float svg,.nav-toggle svg,.promise-box svg,.doc-ok svg,.map-note svg{width:1em;height:1em;fill:currentColor;flex-shrink:0;}
.nav-toggle svg{width:1.2em;height:1.2em;}
.wa-float svg{width:1.4em;height:1.4em;}
.doc-ok{display:inline-flex;align-items:center;gap:8px;}
.promise-box svg{width:1.3em;height:1.3em;}
.map-note{display:inline-flex;align-items:center;gap:6px;}

/* ============ 手机端比例与打开速度优化 ============ */
html,body{overflow-x:hidden;}
img{height:auto;}
.container{padding-left:16px;padding-right:16px;}
@media(max-width:480px){
    .hero{height:380px;}
    .hero h1{font-size:1.55rem;}
    .hero p{font-size:.95rem;padding:0 12px;}
    .section{padding:46px 0;}
    .section-title{margin-bottom:34px;}
    .product-card .img-wrap{height:170px;}
    .form-panel{padding:26px 18px;}
    .contact-info-card{padding:26px 18px;}
    .filter-bar{padding:14px 12px;}
    .wa-float{right:16px;bottom:16px;width:50px;height:50px;}
    .footer-grid{gap:24px;}
    .topbar{font-size:12px;}
    .btn-lg{padding:12px 24px;font-size:15px;}
}

/* ============================================================
   Headless / Supabase 新增样式（不改动既有规则）
   ============================================================ */

/* 状态占位：加载中 / 错误 / 空态 / 未找到 */
.state-box{
    background:#fff;border:1px dashed var(--line);border-radius:10px;
    padding:46px 24px;text-align:center;color:var(--muted);font-size:15px;
    grid-column:1 / -1;
}
.state-box p{margin:0;}
.state-loading{color:var(--accent);}
.state-loading::before{
    content:"";display:block;width:26px;height:26px;margin:0 auto 14px;
    border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;
    animation:hksSpin .9s linear infinite;
}
@keyframes hksSpin{to{transform:rotate(360deg);}}
.state-error{border-color:#f0c6c6;color:#a24343;background:#fdf6f6;}
.state-empty{border-style:dotted;}
.state-notfound{padding:60px 24px;}
.state-notfound h2{color:var(--black);margin-bottom:10px;}
.state-notfound p{margin-bottom:20px;}

/* 悬浮球改为公司 logo 图片 */
.wa-float img{width:100%;height:100%;object-fit:cover;display:block;}

/* 博客卡片网格 */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.blog-card{
    background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;
    display:flex;flex-direction:column;transition:.25s;color:inherit;
}
.blog-card:hover{box-shadow:0 8px 22px rgba(0,0,0,.08);transform:translateY(-3px);border-color:#cfd8e0;}
.blog-card-img{height:180px;overflow:hidden;background:var(--light);}
.blog-card-img img{width:100%;height:100%;object-fit:cover;transition:.4s;}
.blog-card:hover .blog-card-img img{transform:scale(1.05);}
.blog-card-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.blog-date{font-size:12px;color:var(--accent);font-weight:600;letter-spacing:.3px;margin-bottom:8px;text-transform:uppercase;}
.blog-card-body h3{color:var(--black);font-size:1.1rem;margin-bottom:8px;line-height:1.4;}
.blog-card-body p{color:var(--muted);font-size:13.5px;margin-bottom:14px;flex:1;}
.blog-more{color:var(--accent);font-weight:600;font-size:14px;}

/* 报价表单（深色 CTA 区内白色卡片） */
.quote-form-wrap{margin-top:46px;display:flex;justify-content:center;}
.quote-form-wrap .form-panel{max-width:680px;width:100%;text-align:left;}
.quote-form-title{color:var(--black);font-size:1.4rem;margin-bottom:6px;}
.quote-form-sub{color:var(--muted);font-size:14.5px;margin-bottom:22px;}

/* 博客文章阅读页 */
.container-narrow{max-width:820px;}
.blog-article h1{color:var(--black);font-size:2rem;line-height:1.3;margin:8px 0 18px;}
.blog-cover{border-radius:10px;overflow:hidden;margin:18px 0 26px;border:1px solid var(--line);}
.blog-cover img{width:100%;}
.blog-content{color:var(--text);font-size:16px;line-height:1.85;}
.blog-content p{margin-bottom:16px;}
.blog-content h2,.blog-content h3{color:var(--black);margin:26px 0 12px;}
.blog-content img{border-radius:8px;margin:14px 0;}
.blog-content a{color:var(--accent);text-decoration:underline;}

/* 多工艺标签自动换行 */
.product-body .proc-tag{margin-right:6px;margin-bottom:6px;}

@media(max-width:900px){
    .blog-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:560px){
    .blog-grid{grid-template-columns:1fr;}
    .blog-article h1{font-size:1.5rem;}
    .quote-form-wrap{margin-top:34px;}
}