/* ============================================================
   SHUNYICHENG 顺意诚 — B2B 包装外贸独立站前台样式
   简洁专业 / 牛皮纸棕主色 / 响应式 / 逻辑属性自动适配阿语 RTL
   ============================================================ */
:root{
  --brand:#8a5a2b; --brand-dark:#6e4720; --brand-deep:#553717; --brand-light:#b98a55;
  --kraft:#8a5a2b; --whitecat:#2f6f8f; --nonwoven:#3f8f5b;
  --ink:#241f18; --muted:#6f675b; --line:#e7e0d4;
  --bg:#fbf8f2; --bg-alt:#f4ede1; --card:#ffffff;
  --ok:#2f7d4f; --ok-bg:#eaf6ee; --err:#c0392b; --err-bg:#fdecea;
  --wa:#25d366; --wa-dark:#1da851;
  --radius:14px; --radius-sm:10px; --shadow:0 10px 30px rgba(90,64,30,.08); --shadow-sm:0 4px 14px rgba(90,64,30,.07);
  --container:1180px; --header-h:72px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; color:var(--ink); background:var(--bg);
  font-family:"Inter","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,
    "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",
    "Noto Sans Arabic","Noto Sans KR","Noto Sans JP",sans-serif;
  font-size:16px; line-height:1.65; -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block}
a{color:var(--brand); text-decoration:none}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4{line-height:1.25; color:var(--brand-deep); margin:0 0 .5em; font-weight:700}
p{margin:0 0 1em}
.container{width:100%; max-width:var(--container); margin-inline:auto; padding-inline:22px}
.narrow{max-width:860px}
.center{text-align:center}
ul{margin:0; padding:0; list-style:none}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 26px; border-radius:999px; font-weight:600; font-size:15px;
  border:1.5px solid transparent; cursor:pointer; transition:.2s; white-space:nowrap; line-height:1.2}
.btn-primary{background:var(--brand); color:#fff}
.btn-primary:hover{background:var(--brand-dark); color:#fff; transform:translateY(-1px)}
.btn-outline{background:transparent; color:var(--brand); border-color:var(--brand)}
.btn-outline:hover{background:var(--brand); color:#fff}
.btn-light{background:#fff; color:var(--brand-dark)}
.btn-light:hover{background:var(--bg-alt); color:var(--brand-deep)}
.btn-whatsapp{background:var(--wa); color:#fff}
.btn-whatsapp:hover{background:var(--wa-dark); color:#fff}
.btn-sm{padding:9px 18px; font-size:14px}
.btn-lg{padding:15px 34px; font-size:16px}
.btn-block{width:100%; display:flex}
.link-arrow{font-weight:600; font-size:14px; display:inline-block; margin-top:6px}
[dir="rtl"] .link-arrow::after{content:" ←"}
[dir="ltr"] .link-arrow::after{content:" →"}

/* ---------- 头部 ---------- */
.site-header{position:sticky; top:0; z-index:60; background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px); border-bottom:1px solid var(--line); height:var(--header-h)}
.header-inner{display:flex; align-items:center; gap:22px; height:var(--header-h)}
.brand{display:flex; align-items:center; gap:10px; color:var(--brand-deep)}
.brand-logo{flex:none}
.brand-text{display:flex; flex-direction:column; line-height:1.1}
.brand-text strong{font-size:19px; letter-spacing:.5px; color:var(--brand-deep)}
.brand-text small{font-size:11px; color:var(--muted); letter-spacing:2px}
.main-nav{display:flex; gap:6px; margin-inline-start:auto}
.main-nav a{padding:9px 14px; border-radius:8px; color:var(--ink); font-weight:500; font-size:15px}
.main-nav a:hover{background:var(--bg-alt); color:var(--brand-dark)}
.main-nav a.active{color:var(--brand); font-weight:700; background:#f3e9d9}
.header-actions{display:flex; align-items:center; gap:12px}
.lang-menu{position:relative}
.lang-menu summary{display:flex; align-items:center; gap:6px; cursor:pointer; list-style:none;
  padding:8px 10px; border-radius:8px; color:var(--ink); font-size:14px}
.lang-menu summary::-webkit-details-marker{display:none}
.lang-menu summary:hover{background:var(--bg-alt)}
.lang-menu .caret{transition:.2s} .lang-menu[open] .caret{transform:rotate(180deg)}
.lang-dropdown{position:absolute; inset-inline-end:0; top:calc(100% + 8px); background:#fff;
  border:1px solid var(--line); border-radius:12px; box-shadow:var(--shadow); padding:6px;
  min-width:190px; max-height:70vh; overflow:auto; z-index:80}
.lang-dropdown a{display:flex; justify-content:space-between; gap:12px; padding:8px 12px;
  border-radius:8px; color:var(--ink); font-size:14px}
.lang-dropdown a small{color:var(--muted)}
.lang-dropdown a:hover{background:var(--bg-alt)}
.lang-dropdown a.sel{background:#f3e9d9; color:var(--brand-dark); font-weight:700}
.nav-toggle{display:none; flex-direction:column; gap:5px; background:none; border:0; cursor:pointer; padding:8px}
.nav-toggle span{width:24px; height:2px; background:var(--brand-deep); border-radius:2px; transition:.25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(160deg,#f7efe2 0%,#fbf8f2 55%,#f3e9d8 100%);
  border-bottom:1px solid var(--line); overflow:hidden}
.hero-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:40px; align-items:center;
  padding-block:64px}
.badge{display:inline-block; background:#fff; border:1px solid var(--brand-light);
  color:var(--brand-dark); font-size:13px; font-weight:600; padding:6px 14px; border-radius:999px; margin-bottom:18px}
.hero h1{font-size:clamp(30px,4.4vw,48px); letter-spacing:-.5px; margin-bottom:16px}
.hero-sub{font-size:18px; color:var(--muted); max-width:520px}
.hero-actions{display:flex; flex-wrap:wrap; gap:14px; margin:26px 0 20px}
.hero-tags{display:flex; flex-wrap:wrap; gap:10px 22px; color:var(--brand-dark); font-weight:500; font-size:14px}
.hero-visual{display:flex; justify-content:center}
.hero-visual img{width:100%; max-width:520px; filter:drop-shadow(0 24px 40px rgba(90,64,30,.18))}

/* ---------- Stats ---------- */
.stats{background:var(--brand-deep); color:#fff}
.stats-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:20px; padding-block:40px; text-align:center}
.stats-grid strong{display:block; font-size:clamp(26px,3.4vw,40px); color:#fff; font-weight:800}
.stats-grid span{color:#e7d6bd; font-size:14px}

/* ---------- 通用 section ---------- */
.section{padding-block:66px}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center; max-width:680px; margin:0 auto 44px}
.kicker{display:inline-block; color:var(--brand); font-weight:700; font-size:13px;
  letter-spacing:2.5px; text-transform:uppercase; margin-bottom:10px}
.section-head h2{font-size:clamp(24px,3vw,34px)}
.section-head p{color:var(--muted)}
.page-head{background:linear-gradient(160deg,#f7efe2,#fbf8f2); border-bottom:1px solid var(--line); padding-block:52px}
.page-head h1{font-size:clamp(26px,3.4vw,38px)}
.page-head p{color:var(--muted); max-width:680px; margin-bottom:0}

/* ---------- 产品卡 ---------- */
.product-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(250px,1fr)); gap:26px}
.product-card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden; display:flex; flex-direction:column; transition:.25s; box-shadow:var(--shadow-sm)}
.product-card:hover{transform:translateY(-5px); box-shadow:var(--shadow)}
.product-media{position:relative; display:block; background:color-mix(in srgb,var(--cat) 12%,#fff);
  padding:24px; aspect-ratio:4/3; display:flex; align-items:center; justify-content:center}
.product-media img{width:78%; height:auto; transition:.3s}
.product-card:hover .product-media img{transform:scale(1.05)}
.product-cat{position:absolute; inset-block-start:12px; inset-inline-start:12px; background:rgba(255,255,255,.92);
  color:var(--cat,var(--brand)); font-size:12px; font-weight:600; padding:4px 11px; border-radius:999px}
.product-body{padding:18px 18px 20px; display:flex; flex-direction:column; flex:1}
.product-body h3{font-size:17px; margin-bottom:6px}
.product-body h3 a{color:var(--brand-deep)}
.product-tag{color:var(--muted); font-size:14px; min-height:42px; margin-bottom:10px}
.product-meta{font-size:13px; color:var(--brand-dark); font-weight:600; margin-bottom:8px}
.product-body .link-arrow{margin-top:auto}

/* ---------- 筛选 ---------- */
.filter-bar{display:flex; flex-wrap:wrap; align-items:center; gap:10px; margin-bottom:32px}
.chip{border:1.5px solid var(--line); background:#fff; color:var(--ink); padding:8px 18px;
  border-radius:999px; cursor:pointer; font-size:14px; font-weight:500; transition:.2s}
.chip:hover{border-color:var(--brand-light)}
.chip.active{background:var(--brand); border-color:var(--brand); color:#fff}
.filter-count{margin-inline-start:auto; color:var(--muted); font-size:14px}
.filter-count b{color:var(--brand-dark); font-size:17px}
.product-card.is-hidden{display:none}

/* ---------- 特性 / 流程 ---------- */
.feature-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:22px}
.feature-grid-3{grid-template-columns:repeat(3,1fr)}
.feature-card{background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  padding:26px 22px; box-shadow:var(--shadow-sm)}
.feature-num{display:inline-flex; width:42px; height:42px; align-items:center; justify-content:center;
  background:#f3e9d9; color:var(--brand); border-radius:11px; font-weight:800; margin-bottom:14px}
.feature-card h3{font-size:18px}
.feature-card p{color:var(--muted); font-size:14.5px; margin:0}
.process-grid{display:grid; grid-template-columns:repeat(6,1fr); gap:18px; list-style:none; counter-reset:step}
.process-grid li{background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  padding:22px 16px; text-align:center; position:relative}
.step-num{display:inline-flex; width:38px; height:38px; border-radius:50%; background:var(--brand);
  color:#fff; align-items:center; justify-content:center; font-weight:700; margin-bottom:12px}
.process-grid h4{font-size:15px} .process-grid p{font-size:13px; color:var(--muted); margin:0}

/* ---------- CTA ---------- */
.cta-band{background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%); color:#fff; padding-block:60px}
.cta-inner{text-align:center}
.cta-inner h2{color:#fff; font-size:clamp(24px,3vw,32px)}
.cta-inner p{color:#f0e4d0; max-width:620px; margin:0 auto 24px}

/* ---------- 产品详情 ---------- */
.breadcrumb{background:var(--bg-alt); border-bottom:1px solid var(--line); font-size:13.5px; padding-block:12px; color:var(--muted)}
.breadcrumb a{color:var(--muted)} .breadcrumb a:hover{color:var(--brand)}
.product-detail{padding-block:56px}
.detail-grid{display:grid; grid-template-columns:1fr 1.1fr; gap:46px; align-items:start}
.detail-media{background:color-mix(in srgb,var(--cat,#8a5a2b) 12%,#fff); border:1px solid var(--line);
  border-radius:var(--radius); padding:36px; position:sticky; top:calc(var(--header-h) + 20px)}
.detail-media img{width:100%}
.badges{display:flex; gap:10px; margin-top:18px}
.pill{background:#fff; border:1px solid var(--line); color:var(--ok); font-size:13px;
  font-weight:600; padding:5px 13px; border-radius:999px}
.detail-info .product-cat{position:static; background:none; padding:0; font-size:13px; font-weight:700}
.detail-info h1{font-size:clamp(24px,3vw,34px); margin:8px 0 10px}
.lead{font-size:18px; color:var(--brand-dark); font-weight:500}
.desc{color:var(--muted)}
.spec-table{width:100%; border-collapse:collapse; margin:18px 0; font-size:14.5px}
.spec-table th,.spec-table td{text-align:start; padding:11px 14px; border-bottom:1px solid var(--line)}
.spec-table th{width:38%; color:var(--muted); font-weight:500; background:var(--bg)}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:0}
.detail-actions{display:flex; flex-wrap:wrap; gap:14px; margin-top:22px}
.detail-extra{display:grid; grid-template-columns:1fr 1fr; gap:40px; margin-top:56px}
.detail-col h2{font-size:21px} .detail-col h3{font-size:17px; margin-top:24px}
.check-list li{position:relative; padding-inline-start:30px; margin-bottom:12px}
.check-list li::before{content:"✓"; position:absolute; inset-inline-start:0; top:0; width:20px; height:20px;
  background:var(--ok-bg); color:var(--ok); border-radius:50%; font-size:12px; display:flex;
  align-items:center; justify-content:center; font-weight:700}
.usage{color:var(--muted)}

/* ---------- 工厂 / 关于 ---------- */
.intro-band{max-width:880px; text-align:center; margin-bottom:40px}
.intro-band h2{font-size:clamp(22px,2.6vw,30px)}
.intro-band p{color:var(--muted); font-size:17px}
.cert-grid{display:flex; flex-wrap:wrap; gap:18px; justify-content:center}
.cert-large{display:inline-flex; align-items:center; justify-content:center; min-width:150px; padding:26px 30px;
  background:#fff; border:2px solid var(--brand-light); border-radius:var(--radius);
  font-weight:800; font-size:20px; color:var(--brand-dark); letter-spacing:1px}
.cert-row{display:flex; flex-wrap:wrap; gap:8px; margin-top:14px}
.cert-badge{font-size:11px; font-weight:700; color:var(--brand-dark); border:1px solid var(--brand-light);
  padding:3px 9px; border-radius:6px; background:rgba(255,255,255,.6)}
.prose{font-size:16.5px} .prose p{color:var(--muted)}
.value-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:24px; margin-top:30px}
.value-card{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:28px; box-shadow:var(--shadow-sm)}
.value-card h3{font-size:19px} .value-card p{color:var(--muted); margin:0}

/* ---------- 询盘 ---------- */
.inquiry-grid{display:grid; grid-template-columns:1.7fr 1fr; gap:36px; align-items:start}
.inquiry-form-wrap,.inquiry-contact{background:#fff; border:1px solid var(--line);
  border-radius:var(--radius); padding:30px; box-shadow:var(--shadow-sm)}
.form-grid{display:grid; grid-template-columns:1fr 1fr; gap:16px}
.inquiry-form label,.admin-form label{display:flex; flex-direction:column; gap:6px; font-size:14px; font-weight:600; color:var(--brand-deep)}
.inquiry-form label.full{grid-column:1/-1}
.inquiry-form input,.inquiry-form select,.inquiry-form textarea{
  width:100%; padding:11px 13px; border:1.5px solid var(--line); border-radius:9px; font:inherit;
  font-weight:400; color:var(--ink); background:#fff}
.inquiry-form input:focus,.inquiry-form select:focus,.inquiry-form textarea:focus{
  outline:none; border-color:var(--brand-light); box-shadow:0 0 0 3px rgba(138,90,43,.12)}
.inquiry-form textarea{resize:vertical}
.inquiry-form .btn{margin-top:18px}
.form-note{margin:14px 0 0; font-size:14.5px; min-height:20px}
.form-note.ok{color:var(--ok)} .form-note.error{color:var(--err)}
.form-or{color:var(--muted); font-size:13px; text-align:center; margin-top:14px}
.inquiry-contact h2{font-size:20px}
.contact-list li{padding-block:11px; border-bottom:1px dashed var(--line); display:flex; flex-direction:column; gap:2px}
.contact-list small{color:var(--muted); font-size:12px; text-transform:uppercase; letter-spacing:.5px}
.inquiry-contact .btn-whatsapp{margin-top:18px}
.alert{padding:14px 18px; border-radius:10px; margin-bottom:20px; font-size:15px}
.alert-success{background:var(--ok-bg); color:var(--ok); border:1px solid #bfe3cc}
.alert-error{background:var(--err-bg); color:var(--err); border:1px solid #f3c6c0}

/* ---------- 404 ---------- */
.error-page{padding-block:60px}
.error-page h1{font-size:90px; color:var(--brand); margin-bottom:0}
.error-page p{font-size:18px; color:var(--muted)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-deep); color:#e9ddc8; margin-top:0}
.footer-grid{display:grid; grid-template-columns:1.6fr 1fr 1fr 1.4fr; gap:34px; padding-block:54px}
.footer-brand .brand-text strong{color:#fff} .footer-brand .brand-text small{color:#cdb795}
.footer-about p{color:#d8c7a8; font-size:14px; margin-top:14px}
.footer-col h4{color:#fff; font-size:15px; margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{color:#d8c7a8; font-size:14px}
.footer-col a:hover{color:#fff}
.footer-contact li{display:flex; flex-direction:column; gap:2px; margin-bottom:12px}
.footer-contact span{color:#b9a17e; font-size:12px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12); padding-block:18px; font-size:13px; color:#c6b18e}

/* ---------- 浮动按钮 ---------- */
.fab-whatsapp,.fab-top{position:fixed; inset-inline-end:22px; z-index:70; width:52px; height:52px;
  border-radius:50%; display:flex; align-items:center; justify-content:center; box-shadow:0 8px 22px rgba(0,0,0,.22)}
.fab-whatsapp{bottom:22px; background:var(--wa); color:#fff}
.fab-whatsapp:hover{background:var(--wa-dark); color:#fff}
.fab-top{bottom:84px; background:var(--brand); color:#fff; border:0; cursor:pointer;
  opacity:0; visibility:hidden; transform:translateY(10px); transition:.25s}
.fab-top.show{opacity:1; visibility:visible; transform:translateY(0)}
.fab-top:hover{background:var(--brand-dark); color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid-3{grid-template-columns:repeat(2,1fr)}
  .process-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr; gap:26px; padding-block:44px}
  .hero-visual{order:-1} .hero-visual img{max-width:340px}
  .detail-grid{grid-template-columns:1fr; gap:30px}
  .detail-media{position:static; max-width:440px; margin-inline:auto}
  .detail-extra{grid-template-columns:1fr; gap:30px}
  .inquiry-grid{grid-template-columns:1fr}
  .value-grid{grid-template-columns:1fr}
  .main-nav{position:fixed; inset-inline:0; top:var(--header-h); background:#fff; flex-direction:column;
    gap:0; padding:10px 18px 20px; border-bottom:1px solid var(--line); box-shadow:var(--shadow);
    transform:translateY(-130%); transition:.3s; z-index:55}
  .main-nav.open{transform:translateY(0)}
  .main-nav a{padding:13px 10px; border-bottom:1px solid var(--bg-alt); font-size:16px}
  .nav-toggle{display:flex}
  .header-quote{display:none}
}
@media (max-width:600px){
  body{font-size:15px}
  .section{padding-block:46px}
  .stats-grid{grid-template-columns:repeat(2,1fr); gap:26px 14px}
  .feature-grid,.feature-grid-3{grid-template-columns:1fr}
  .process-grid{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr; gap:26px}
  .inquiry-form-wrap,.inquiry-contact{padding:22px}
  .filter-count{margin-inline-start:0; width:100%}
  .fab-whatsapp,.fab-top{width:46px; height:46px; inset-inline-end:16px}
  .fab-top{bottom:74px} .fab-whatsapp{bottom:16px}
  .brand-text small{display:none}
}