:root{
  --red:#e01f2d; --red-d:#b3151f; --dark:#111418; --ink:#22262b;
  --muted:#6b7280; --line:#e5e7eb; --bg:#f6f7f9; --card:#ffffff;
  --radius:14px; --shadow:0 8px 28px rgba(17,20,24,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
h1,h2,h3,h4{line-height:1.25}
.section{padding:64px 0}
.section.alt{background:#fff}
.sec-head{text-align:center;max-width:760px;margin:0 auto 40px}
.sec-head h2{font-size:34px;color:var(--dark)}
.sec-head h2::after{content:"";display:block;width:64px;height:4px;background:var(--red);border-radius:2px;margin:14px auto 0}
.sec-head p{color:var(--muted);margin-top:10px}
.eyebrow{color:var(--red);font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-size:13px}

/* topbar */
.topbar{background:var(--dark);color:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 12px rgba(0,0,0,.25)}
.nav{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.02em}
.brand img{height:34px;border-radius:6px}
.brand em{font-style:normal;color:var(--red);font-weight:600;font-size:11px;letter-spacing:.28em;display:block;line-height:1}
.menu{display:flex;gap:24px;margin-left:auto}
.menu a{padding:6px 2px;font-size:15px;color:#d6d9de;border-bottom:2px solid transparent}
.menu a:hover,.menu a.on{color:#fff;border-color:var(--red)}
.nav-actions{display:flex;align-items:center;gap:14px;margin-left:8px}
.cart-link{position:relative;font-size:15px;color:#d6d9de}
.cart-link:hover{color:#fff}
.badge{display:inline-flex;align-items:center;justify-content:center;min-width:18px;height:18px;padding:0 5px;margin-left:4px;background:var(--red);border-radius:9px;font-size:12px;font-weight:700}
.burger{display:none;background:none;border:0;color:#fff;font-size:22px;cursor:pointer}
.flash{margin:14px 0;padding:12px 16px;background:#eef9f0;border:1px solid #bfe8c8;border-radius:10px;color:#14642b}

/* buttons */
.btn{display:inline-block;padding:11px 22px;border-radius:10px;font-weight:700;font-size:15px;border:0;cursor:pointer;transition:.15s}
.btn.primary{background:var(--red);color:#fff}
.btn.primary:hover{background:var(--red-d)}
.btn.dark{background:var(--dark);color:#fff}
.btn.ghost{border:1px solid #3a3f46;color:#e5e7eb;background:transparent}
.btn.ghost:hover{border-color:#fff;color:#fff}
.btn.sm{padding:7px 14px;font-size:13px;border-radius:8px}
.btn.block{display:block;width:100%;text-align:center}

/* hero carousel */
.hero{position:relative;overflow:hidden;background:var(--dark)}
.slides{display:flex;transition:transform .5s ease}
.slide{min-width:100%;position:relative}
.slide img{width:100%;height:520px;object-fit:cover;display:block}
.slide-text{position:absolute;left:120px;top:250px;max-width:760px;color:#fff}
.slide-text h2{font-size:56px;line-height:1.15;text-shadow:0 2px 14px rgba(0,0,0,.4)}
.slide-text p{font-size:22px;color:#dfe3e8;margin-top:14px;text-shadow:0 2px 10px rgba(0,0,0,.4)}
@media(max-width:960px){.slide-text{left:24px;top:140px}.slide-text h2{font-size:30px}.slide-text p{font-size:15px}}
.hero-dots{position:absolute;bottom:18px;left:0;right:0;display:flex;gap:10px;justify-content:center}
.hero-dots button{width:10px;height:10px;border-radius:50%;border:0;background:rgba(255,255,255,.45);cursor:pointer}
.hero-dots button.on{background:#fff;transform:scale(1.25)}
.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);background:rgba(0,0,0,.35);color:#fff;border:0;width:44px;height:44px;border-radius:50%;font-size:20px;cursor:pointer}
.hero-arrow.prev{left:16px}.hero-arrow.next{right:16px}

/* cards & grids */
.grid{display:grid;gap:24px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;transition:.18s}
.card:hover{transform:translateY(-3px)}
.card .thumb{aspect-ratio:4/3;object-fit:cover;width:100%;display:block;background:#10131a}
.card .body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.card h3{font-size:18px;color:var(--dark)}
.card .tag{color:var(--muted);font-size:13px;min-height:38px}
.price{font-size:20px;font-weight:800;color:var(--red)}
.chip{display:inline-block;background:#fdeef0;color:var(--red);font-size:12px;font-weight:700;padding:2px 10px;border-radius:999px;width:max-content}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}

/* feature tiles */
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.tile{background:#fff;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.tile .ico{font-size:30px}
.tile h3{font-size:16px;margin:10px 0 6px}
.tile p{font-size:14px;color:var(--muted)}

/* banner strip */
.strip{background:linear-gradient(120deg,var(--dark),#2b0a0e);color:#fff;text-align:center;padding:44px 20px}
.strip h2{font-size:30px}
.strip p{color:#c9ced6;margin-top:8px}

/* forms */
form.stack{display:flex;flex-direction:column;gap:14px;max-width:460px}
form.stack.wide{max-width:none}
label.f{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:600;color:#374151}
label.f input,label.f select,label.f textarea{padding:11px 12px;border:1px solid var(--line);border-radius:9px;font-size:15px;font-family:inherit}
label.f input:focus,label.f select:focus,label.f textarea:focus{outline:2px solid #f4b6bb;border-color:var(--red)}
.form-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}

/* table */
table.tbl{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.tbl th,.tbl td{padding:12px 14px;text-align:left;font-size:14px;border-bottom:1px solid var(--line)}
.tbl th{background:#f3f4f6;font-size:13px;color:#374151}
.st{font-weight:700;font-size:12px;padding:3px 10px;border-radius:999px}
.st-pending{background:#fef3c7;color:#92400e}.st-paid{background:#dbeafe;color:#1e40af}
.st-shipped{background:#e0e7ff;color:#3730a3}.st-delivered{background:#dcfce7;color:#166534}
.st-cancelled{background:#fee2e2;color:#991b1b}

/* cart */
.cartline{display:flex;gap:16px;align-items:center;background:#fff;border-radius:12px;padding:14px 18px;box-shadow:var(--shadow);margin-bottom:12px}
.cartline img{width:86px;height:64px;object-fit:cover;border-radius:8px}
.qty{display:flex;align-items:center;gap:8px}
.qty button{width:26px;height:26px;border-radius:6px;border:1px solid var(--line);background:#fff;cursor:pointer;font-weight:700}
.summary{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.summary .row{display:flex;justify-content:space-between;padding:6px 0;font-size:15px}
.summary .row.total{border-top:1px solid var(--line);margin-top:8px;padding-top:12px;font-size:19px;font-weight:800}

/* faq */
.faq{background:#fff;border-radius:12px;box-shadow:var(--shadow);margin-bottom:12px;overflow:hidden}
.faq>button{width:100%;text-align:left;padding:16px 20px;background:none;border:0;font-size:16px;font-weight:700;color:var(--dark);cursor:pointer;display:flex;justify-content:space-between}
.faq .ans{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 20px}
.faq.open .ans{max-height:1200px;padding:0 20px 18px}
.faq .ans p{color:#4b5563}
.faq .ans img,.faq .ans video{max-width:100%;border-radius:8px;margin:8px 0}

/* footer */
.footer{background:var(--dark);color:#b8bdc4;margin-top:70px;padding:50px 0 0}
.fgrid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;font-size:14px}
.fgrid h4{color:#fff;margin-bottom:12px;font-size:15px}
.fgrid a{display:block;margin-bottom:8px}
.fgrid a:hover{color:#fff}
.flogo{height:36px;border-radius:6px;margin-bottom:14px}
.copy{border-top:1px solid #2a2f36;margin-top:36px;padding:18px;text-align:center;font-size:13px}

/* hero small pages */
.page-hero{background:linear-gradient(120deg,var(--dark),#2b0a0e);color:#fff;padding:56px 0;text-align:center}
.page-hero h1{font-size:36px}
.page-hero p{color:#c9ced6;margin-top:10px}

/* admin */
.admin-shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}
.admin-side{background:var(--dark);color:#c9ced6;padding:22px 0}
.admin-side .brand2{padding:0 22px 18px;font-weight:800;color:#fff}
.admin-side a{display:block;padding:11px 22px;font-size:14px}
.admin-side a:hover,.admin-side a.on{background:#1c2128;color:#fff;border-left:3px solid var(--red)}
.admin-main{padding:34px;max-width:1200px}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:28px}
.stat{background:#fff;border-radius:12px;box-shadow:var(--shadow);padding:20px}
.stat .n{font-size:26px;font-weight:800;color:var(--dark)}
.stat .l{font-size:13px;color:var(--muted)}
.bars{display:flex;align-items:flex-end;gap:14px;height:180px;padding:10px;background:#fff;border-radius:12px;box-shadow:var(--shadow)}
.bars .b{flex:1;background:linear-gradient(180deg,var(--red),#ff6b5e);border-radius:6px 6px 0 0;position:relative;min-height:4px}
.bars .b span{position:absolute;bottom:-24px;left:0;right:0;text-align:center;font-size:11px;color:var(--muted)}
.panel{background:#fff;border-radius:12px;box-shadow:var(--shadow);padding:22px;margin-bottom:24px}
.panel h3{margin-bottom:14px}
.inline-actions{display:flex;gap:8px;flex-wrap:wrap}
.textarea-md{min-height:120px}
.muted{color:var(--muted);font-size:13px}

@media(max-width:960px){
  .g4,.tiles{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr 1fr}
  .menu{position:fixed;top:64px;left:0;right:0;background:var(--dark);flex-direction:column;padding:16px 24px;gap:14px;display:none}
  .menu.open{display:flex}
  .burger{display:block;margin-left:auto}
  .nav{gap:12px}
  .slide img{height:340px}
}
@media(max-width:620px){
  .g4,.tiles,.g3,.g2{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .fgrid{grid-template-columns:1fr}
  .admin-shell{grid-template-columns:1fr}
}

/* 解决方案配图 */
.solv{display:flex;align-items:center;justify-content:center;overflow:hidden;padding:18px;background:#fff}
.solv img{max-height:460px;max-width:100%;object-fit:contain;border-radius:14px}

/* ---------- 后台语言切换 / admin language switch ---------- */
.admin-side{display:flex;flex-direction:column}
.alang-switch{display:inline-flex;gap:2px;padding:2px;background:#f1f2f4;border:1px solid var(--line);border-radius:999px}
.admin-side .alang-switch{margin:10px 20px 0;background:rgba(255,255,255,.09);border-color:rgba(255,255,255,.16)}
.alang-switch a,.admin-side .alang-switch a{display:inline-block;padding:3px 11px;border-radius:999px;font-size:12px;line-height:1.7;color:#5b6470;text-decoration:none;border:0}
.admin-side .alang-switch a{color:#cfd6df}
.alang-switch a.on,.admin-side .alang-switch a.on{background:var(--red);color:#fff}
.admin-side .alang-switch a:hover{background:rgba(255,255,255,.14);color:#fff}
.admin-side .alang-switch a.on:hover{background:var(--red)}
.admin-side .aside-foot{margin-top:auto;padding-top:14px;border-top:1px solid rgba(255,255,255,.08)}
.admin-side .alang-switch a:hover{border-left:0!important}

/* ---------- FAQ 富文本排版 / rich text ---------- */
.rich{line-height:1.8}
.rich p{margin:0 0 10px}
.rich img{max-width:100%;height:auto;border-radius:12px;margin:12px 0;box-shadow:var(--shadow)}
.rich video{max-width:100%;width:100%;max-height:480px;border-radius:12px;margin:12px 0;background:#000}
.rich h3,.rich h4{margin:16px 0 8px}
.rich ul,.rich ol{padding-left:22px;margin:0 0 10px}
.rich a{color:var(--red)}
.rich table{border-collapse:collapse;margin:10px 0}
.rich table td,.rich table th{border:1px solid var(--line);padding:6px 10px}

/* V3: product detail long-image & gallery & options */
.detail-long{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:0 8px 30px rgba(16,19,26,.06)}
.detail-long img{width:100%;display:block;border-radius:8px}
.galthumb{transition:transform .15s}
.galthumb:hover{transform:scale(1.06)}
.opt-chip{display:inline-block;background:#fdeef0;color:var(--red);font-size:13px;font-weight:600;padding:5px 14px;border-radius:999px;border:1px solid #f6cdd2}

/* ---------- V4: 价格 / 数字实力 / 解决方案 / 商品媒体 ---------- */
.prices{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;margin:6px 0 2px}
.price-now{font-size:20px;font-weight:800;color:var(--red);letter-spacing:-.01em}
.price-was{font-size:13px;color:#9aa1ab;text-decoration:line-through}
.price-off{font-size:11px;font-weight:700;color:var(--red);background:#fdeef0;border:1px solid #f6cdd2;padding:1px 6px;border-radius:6px}
.price-tag{font-size:11px;font-weight:700;color:#fff;background:var(--red);padding:2px 8px;border-radius:6px}
.prices.lg{margin:14px 0 4px;gap:12px}
.prices.lg .price-now{font-size:34px}
.prices.lg .price-was{font-size:16px}
.stock{display:inline-block;font-size:13px;color:#14642b;background:#eef9f0;border:1px solid #bfe8c8;padding:3px 10px;border-radius:8px;margin-top:10px}
.vid-flag{position:absolute;right:10px;bottom:10px;width:30px;height:30px;border-radius:50%;background:rgba(0,0,0,.55);color:#fff;display:flex;align-items:center;justify-content:center;font-size:11px}

.strength{background:radial-gradient(1200px 520px at 50% -10%,#33090f 0%,#111418 62%);color:#fff;padding:70px 0}
.sec-head.light h2{color:#fff}
.sec-head.light p{color:#b9c0ca}
.counters{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:6px auto 42px;max-width:980px;text-align:center}
.counter{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);border-radius:16px;padding:22px 12px}
.counter .num{font-size:40px;font-weight:800;color:#fff;display:block;line-height:1.15;font-variant-numeric:tabular-nums}
.counter span{font-size:13px;color:#c9ced6}
.cases-h{font-size:18px;color:#fff;margin:0 0 16px}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.case{position:relative;border-radius:14px;overflow:hidden;display:block;aspect-ratio:16/10;box-shadow:0 10px 30px rgba(0,0,0,.35)}
.case img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.case:hover img{transform:scale(1.06)}
.case-cap{position:absolute;left:0;right:0;bottom:0;padding:28px 16px 12px;font-size:14px;font-weight:700;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.78))}

.sol-hero .sol-nav{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:24px}
.sol-nav a{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border:1px solid rgba(255,255,255,.24);border-radius:999px;font-size:13px;color:#e7eaee}
.sol-nav a:hover{background:#fff;color:var(--dark);border-color:#fff}
.sol-head{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.sol-head h2{font-size:32px;margin:8px 0 6px;color:var(--dark)}
.sol-sub{font-size:17px;color:var(--red);font-weight:600}
.sol-intro{color:#4b5563;font-size:15px;margin-top:12px;line-height:1.85}
.sol-dl-note{font-size:13px;color:var(--muted);margin-top:10px}
.sol-dl-list{margin-top:14px;display:grid;gap:8px;max-width:560px}
.sol-dl-item{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;font-size:13px;color:var(--dark);transition:border-color .15s,box-shadow .15s}
.sol-dl-item:hover{border-color:var(--red);box-shadow:0 6px 18px rgba(198,40,40,.12)}
.sol-dl-item .fi{font-size:16px}
.sol-dl-item .fn{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600}
.sol-dl-item .fs{color:var(--muted);font-size:12px;white-space:nowrap}
.sol-dl-item .fd{color:var(--red)}
.sol-cover img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:18px;box-shadow:0 18px 44px rgba(16,19,26,.16)}
.sol-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;background:linear-gradient(120deg,#111418,#2b0a0e);border-radius:18px;padding:22px;margin:34px 0 6px;text-align:center}
.sol-stats b{display:block;font-size:30px;color:#fff}
.sol-stats span{font-size:12px;color:#c9ced6}
.sol-block{margin-top:38px}
.sol-block h3{font-size:20px;display:flex;align-items:center;gap:10px;margin-bottom:16px;color:var(--dark)}
.sol-block h3 i{width:4px;height:18px;background:var(--red);border-radius:2px;display:inline-block}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.pain{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.pain b{display:block;margin-bottom:6px;color:var(--dark);font-size:15px}
.pain span{font-size:13px;color:var(--muted);line-height:1.7}
.arch-flow{display:grid;gap:12px}
.step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.step em{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;background:var(--red);color:#fff;font-style:normal;font-size:12px;font-weight:700;margin-bottom:8px}
.step b{display:block;font-size:15px;color:var(--dark);margin-bottom:5px}
.step span{font-size:13px;color:var(--muted);line-height:1.7}
.feat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:0 4px 14px rgba(16,19,26,.04)}
.feat b{display:block;margin-bottom:6px;color:var(--dark)}
.feat span{font-size:13px;color:var(--muted);line-height:1.7}
.feat-grid{gap:14px}
.sol-bottom{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.sol-scene{display:flex;gap:8px;flex-wrap:wrap}
.scene-chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13px;color:#374151}
.sol-prod{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.sol-prod a{font-size:13px;color:var(--red);background:#fdeef0;border-radius:999px;padding:6px 12px;font-weight:600}
.value{background:#fff;border-left:3px solid var(--red);border-radius:10px;padding:12px 16px;margin-bottom:10px}
.value b{display:block;color:var(--dark);font-size:15px}
.value span{font-size:13px;color:var(--muted)}
.sol-contact{background:#fff}
.sol-contact-box{display:flex;justify-content:space-between;align-items:center;gap:24px;background:linear-gradient(120deg,#111418,#2b0a0e);color:#fff;border-radius:20px;padding:34px 38px}
.sol-contact-box h2{font-size:26px}
.sol-contact-box p{color:#c9ced6;margin-top:6px}

.pdetail-media{background:#fff;border-radius:14px;box-shadow:var(--shadow);padding:18px}
.stage{background:#f6f7f9;border-radius:12px;display:flex;align-items:center;justify-content:center;min-height:360px;overflow:hidden}
.stage img{max-width:100%;max-height:520px;object-fit:contain;border-radius:10px;display:block}
.stage video{width:100%;max-height:520px;border-radius:10px;background:#000;display:block}
.galthumbs{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.galthumb{width:70px;height:70px;padding:0;border:2px solid var(--line);border-radius:10px;overflow:hidden;cursor:pointer;background:#f3f4f6;position:relative}
.galthumb.on{border-color:var(--red)}
.galthumb img,.galthumb video{width:100%;height:100%;object-fit:cover;display:block}
.galthumb .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#fff;background:rgba(0,0,0,.35);font-size:16px}
.spec-tbl{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.spec-tbl th,.spec-tbl td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec-tbl th{width:220px;background:#f7f8fa;font-weight:600;color:#374151}
.spec-tbl td.idx{width:56px;color:var(--muted)}
.detail-rich{background:#fff;border-radius:14px;box-shadow:var(--shadow);padding:26px}
@media(max-width:960px){
  .sol-head{grid-template-columns:1fr}
  .sol-bottom{grid-template-columns:1fr}
  .sol-contact-box{flex-direction:column;align-items:flex-start}
  .pain-grid,.counters,.sol-stats,.case-grid{grid-template-columns:repeat(2,1fr)}
  .arch-flow{grid-template-columns:1fr!important}
}
@media(max-width:620px){.pain-grid,.counters,.sol-stats,.case-grid{grid-template-columns:1fr}}

/* V5: 详情页顶部商品条 & 更多商品链接 */
.pd-strip{display:grid;grid-template-columns:1.25fr .75fr;gap:34px;align-items:center;background:#fff;border-radius:16px;box-shadow:var(--shadow);padding:26px 30px}
.pd-strip-buy{border-left:1px solid var(--line);padding-left:30px}
.more-link{position:absolute;right:0;bottom:6px;font-size:14px;font-weight:600;color:var(--red)}
.more-link:hover{text-decoration:underline}
.sec-head{position:relative}
@media(max-width:860px){.pd-strip{grid-template-columns:1fr}.pd-strip-buy{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:18px}}