@charset "utf-8";
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f4f3;
  --text: #18212a;
  --muted: #65717e;
  --line: #dfe5e8;
  --brand: #10372f;
  --brand-2: #0f6b5a;
  --accent: #d75c37;
  --amber: #c9922e;
  --green: #0f8062;
  --shadow: 0 18px 50px rgba(22, 33, 42, .12);
  --radius: 8px;
  --max: 1200px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: linear-gradient(180deg, #f7f9fa, var(--bg)); color: var(--text); font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif; font-size: 15px; line-height: 1.65; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; }
button, .btn, .pill-link, .nav a, .app-tab { -webkit-tap-highlight-color: transparent; }
.page { min-height: 100vh; overflow: clip; }
.container { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 40; background: rgba(255,255,255,.92); color: var(--text); border-bottom: 1px solid rgba(223,229,232,.86); box-shadow: 0 10px 30px rgba(24,33,42,.07); backdrop-filter: blur(18px); }
.header-inner { min-height: 78px; display: grid; grid-template-columns: 300px minmax(0, 1fr) auto; gap: 10px 18px; align-items: center; padding: 12px 0; }
.brand { display: inline-grid; grid-template-columns: 48px minmax(0, 1fr); grid-template-rows: auto auto; column-gap: 11px; row-gap: 4px; align-items: center; min-width: 0; }
.brand-logo { grid-row: 1 / 3; width: 48px; height: 48px; display: block; object-fit: cover; border-radius: 12px; background: #fff; box-shadow: 0 8px 18px rgba(16,55,47,.12); }
.brand-title { grid-column: 2; font-size: 21px; line-height: 1.05; font-weight: 800; letter-spacing: 0; }
.brand-subtitle { grid-column: 2; color: var(--muted); font-size: 12px; line-height: 1.35; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.pill-link, .menu-toggle { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 13px; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: var(--brand); cursor: pointer; white-space: nowrap; }
.pill-link:hover, .menu-toggle:hover { border-color: rgba(15,107,90,.35); box-shadow: 0 8px 22px rgba(16,55,47,.08); }
.menu-toggle { display: none; width: 44px; padding: 0; font-size: 0; }
.menu-toggle::before { content: ""; width: 18px; height: 14px; background: linear-gradient(var(--brand), var(--brand)) 0 0 / 100% 2px no-repeat, linear-gradient(var(--brand), var(--brand)) 0 6px / 100% 2px no-repeat, linear-gradient(var(--brand), var(--brand)) 0 12px / 100% 2px no-repeat; }
.nav { grid-column: 2 / 3; grid-row: 1; display: flex; justify-content: center; flex-wrap: nowrap; gap: 4px; align-items: center; min-width: 0; }
.nav a { min-height: 36px; display: inline-flex; align-items: center; padding: 0 10px; border-radius: 999px; color: #3c4651; font-size: 14px; white-space: nowrap; }
.nav a:hover, .nav a.active { background: var(--surface-2); color: var(--brand); }
.search { grid-column: 2 / 3; grid-row: 2; display: flex; align-items: center; gap: 8px; width: min(100%, 480px); justify-self: center; padding: 5px; border-radius: 999px; background: #fff; border: 1px solid var(--line); box-shadow: 0 8px 20px rgba(24,33,42,.04); }
.search input { flex: 1; min-width: 0; height: 38px; padding: 0 12px; color: var(--text); background: transparent; border: 0; outline: 0; }
.search input::placeholder { color: #96a0aa; }
.search button { width: 42px; height: 38px; border: 0; border-radius: 999px; background: var(--brand); color: #fff; cursor: pointer; }
.hero { position: relative; isolation: isolate; min-height: clamp(500px, 72vh, 700px); display: grid; align-items: end; background: #121a21; color: #fff; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(10,18,24,.84), rgba(10,18,24,.55) 46%, rgba(10,18,24,.18)); }
.hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 160px; z-index: -1; background: linear-gradient(0deg, rgba(10,18,24,.82), rgba(10,18,24,0)); }
.hero-grid { min-height: inherit; display: grid; align-items: end; padding: 80px 0 56px; }
.hero-copy { max-width: 720px; }
.hero-copy h1 { margin: 0; font-size: clamp(40px, 5.4vw, 68px); line-height: 1.04; letter-spacing: 0; text-wrap: balance; }
.hero-copy p { max-width: 680px; margin: 18px 0 0; color: rgba(255,255,255,.84); font-size: 18px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-media { position: absolute; inset: 0; z-index: -2; overflow: hidden; background: #172027; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.btn { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 0 18px; border-radius: 6px; background: var(--brand); color: #fff; border: 1px solid transparent; cursor: pointer; font-weight: 700; }
.btn:hover { background: var(--brand-2); }
.btn.secondary { background: #fff; color: var(--brand); border-color: var(--line); }
.btn:disabled,
button:disabled,
input[type="submit"]:disabled {
  cursor: wait;
  opacity: .68;
}
.hero .btn.secondary { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.28); backdrop-filter: blur(10px); }
.section { padding: 50px 0; }
.section.compact { padding-top: 26px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 24px; }
.section-head h2, .page-title { margin: 0; font-size: clamp(27px, 3vw, 40px); line-height: 1.15; letter-spacing: 0; }
.section-head p { margin: 7px 0 0; color: var(--muted); }
.metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: -34px; position: relative; z-index: 2; }
.metric { min-width: 0; padding: 18px; border: 1px solid rgba(223,229,232,.86); border-radius: var(--radius); background: rgba(255,255,255,.96); box-shadow: 0 16px 40px rgba(24,33,42,.12); }
.metric strong { display: block; color: var(--brand); font-size: 26px; line-height: 1.1; }
.metric span { display: block; margin-top: 5px; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.feature-card { min-width: 0; padding: 20px; border: 1px solid var(--line); border-top: 3px solid rgba(15,107,90,.36); border-radius: var(--radius); background: #fff; box-shadow: 0 12px 30px rgba(24,33,42,.07); }
.feature-card .mark { display: grid; place-items: center; width: 42px; height: 42px; margin-bottom: 14px; border-radius: 8px; background: var(--surface-2); color: var(--brand); font-weight: 900; }
.feature-card h3 { margin: 0 0 8px; font-size: 18px; line-height: 1.3; }
.feature-card p { margin: 0; color: var(--muted); }
.process-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--line); }
.process-step { min-width: 0; padding: 22px; background: #fff; }
.process-step strong { display: inline-grid; place-items: center; min-width: 34px; height: 34px; margin-bottom: 14px; border-radius: 999px; background: var(--brand); color: #fff; }
.process-step h3 { margin: 0 0 8px; font-size: 18px; }
.process-step p { margin: 0; color: var(--muted); }
.layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 28px; align-items: start; }
.content { min-width: 0; }
.sidebar { position: sticky; top: 118px; padding: 18px; background: rgba(255,255,255,.86); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 28px rgba(24,33,42,.05); }
.sidebar h2 { margin: 0 0 14px; font-size: 20px; }
.sidebar .meta { margin-bottom: 14px; }
.category-list { display: grid; gap: 5px; margin: 0; padding: 0; list-style: none; }
.category-list a { display: flex; align-items: center; min-height: 36px; padding: 0 10px; border-radius: 6px; color: #4c5966; }
.category-list a:hover, .category-list a.active { color: var(--brand); background: var(--surface-2); }
.shop-summary { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.summary-chip { display: inline-flex; align-items: center; min-height: 30px; padding: 0 10px; border-radius: 999px; background: var(--surface-2); color: var(--brand); font-size: 13px; font-weight: 700; }
.shop-tools { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 12px; margin-bottom: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 10px 24px rgba(24,33,42,.05); }
.shop-tools input { min-width: 0; min-height: 42px; padding: 0 12px; border: 1px solid var(--line); border-radius: 6px; outline: none; }
.shop-tools input:focus { border-color: var(--brand-2); box-shadow: 0 0 0 3px rgba(15,107,90,.12); }
.shop-tools .btn { min-height: 42px; }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(236px, 1fr)); gap: 18px; margin: 0; padding: 0; list-style: none; }
.product-card { min-width: 0; display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 12px 30px rgba(24,33,42,.07); overflow: hidden; transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: rgba(15,107,90,.26); }
.product-card .card-link { display: flex; flex: 1; flex-direction: column; min-width: 0; }
.product-card .media { position: relative; display: grid; place-items: center; min-height: 236px; padding: 20px; background: linear-gradient(180deg, #fff 0%, #fbfcfc 54%, #f3f7f6 100%); border-bottom: 1px solid #edf1f2; }
.product-card .media::after { content: ""; position: absolute; left: 18%; right: 18%; bottom: 16px; height: 18px; border-radius: 999px; background: radial-gradient(ellipse at center, rgba(24,33,42,.13), rgba(24,33,42,0) 70%); pointer-events: none; }
.product-card img { position: relative; z-index: 1; width: 100%; height: 196px; object-fit: contain; border: 0; border-radius: 7px; background: transparent; transition: transform .2s ease; }
.product-card:hover img { transform: scale(1.025); }
.product-tag { position: absolute; top: 12px; left: 12px; z-index: 2; display: inline-flex; align-items: center; min-height: 26px; padding: 0 9px; border-radius: 999px; background: rgba(240,244,243,.94); color: var(--brand); font-size: 12px; font-weight: 800; }
.product-card .body { display: flex; flex: 1; flex-direction: column; min-width: 0; padding: 16px 16px 14px; }
.product-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.product-meta span { display: inline-flex; align-items: center; min-height: 24px; padding: 0 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); font-size: 12px; font-weight: 700; }
.product-card h3 { min-height: 42px; margin: 0; font-size: 17px; line-height: 1.35; overflow-wrap: anywhere; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-code { margin-top: 6px; color: var(--muted); font-size: 12px; line-height: 1.3; overflow-wrap: anywhere; }
.price { display: flex; align-items: baseline; gap: 8px; margin: auto 0 0; padding-top: 14px; color: var(--green); font-weight: 900; }
.price::before { content: "\53C2\8003\4EF7"; color: var(--muted); font-size: 12px; font-weight: 700; }
.price span { font-size: 20px; line-height: 1; }
.price del { color: #9ba5af; font-weight: 400; font-size: 14px; }
.card-actions { display: grid; grid-template-columns: .9fr 1.1fr; gap: 9px; padding: 0 16px 16px; }
.card-actions .btn { min-height: 42px; padding: 0 10px; border-radius: 7px; font-size: 14px; }
.card-actions .btn::after { content: "\203A"; font-size: 18px; line-height: 1; }
.card-actions .btn.secondary { background: var(--accent); color: #fff; border-color: var(--accent); }
.card-actions .btn.secondary::after { content: "+"; font-size: 17px; font-weight: 900; }
.product-detail { display: grid; grid-template-columns: minmax(320px, .84fr) minmax(0, 1.16fr); gap: 32px; align-items: start; }
.detail-media { position: sticky; top: 132px; display: grid; place-items: center; min-height: min(620px, calc(100vh - 168px)); max-height: calc(100vh - 160px); padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 14px 34px rgba(24,33,42,.08); overflow: hidden; }
.detail-media img { width: 100%; max-height: calc(100vh - 204px); object-fit: contain; }
.detail-copy { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: 0 14px 34px rgba(24,33,42,.06); }
.detail-copy h1 { margin: 0; font-size: clamp(28px, 3vw, 44px); line-height: 1.15; letter-spacing: 0; }
.detail-badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 16px; }
.detail-badge { display: inline-flex; align-items: center; min-height: 30px; padding: 0 10px; border-radius: 999px; background: var(--surface-2); color: var(--brand); font-size: 13px; font-weight: 800; }
.detail-price-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; padding: 14px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.detail-price-row .price { margin: 0; font-size: 22px; }
.detail-specs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 18px 0; }
.spec-item { min-width: 0; padding: 12px; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
.spec-item span { display: block; color: var(--muted); font-size: 12px; }
.spec-item strong { display: block; margin-top: 3px; color: var(--text); overflow-wrap: anywhere; }
.procurement-panel { margin-top: 18px; padding: 16px; border-radius: var(--radius); background: linear-gradient(135deg, #f0f7f5, #fff); border: 1px solid rgba(15,107,90,.18); }
.procurement-panel h2 { margin: 0 0 10px; font-size: 18px; }
.procurement-steps { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; color: #41505a; }
.procurement-steps li { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 8px; align-items: start; }
.procurement-steps strong { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 999px; background: var(--brand); color: #fff; font-size: 12px; }
.detail-support { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 18px; }
.support-card { min-width: 0; padding: 12px; border: 1px solid var(--line); border-radius: 7px; background: #fff; color: var(--muted); }
.support-card strong { display: block; color: var(--brand); margin-bottom: 2px; }
.mobile-purchase-bar { display: none; }
.meta { color: var(--muted); margin: 8px 0 18px; }
.description { color: #394550; white-space: normal; }
.toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.breadcrumb { color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.notice { padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; color: var(--muted); }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 12px 30px rgba(24,33,42,.07); padding: 22px; }
.panel h1, .panel h2, .panel h3 { margin-top: 0; line-height: 1.2; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-weight: 700; color: #34414d; }
.field input, .field textarea, .field select { width: 100%; min-height: 46px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--text); outline: none; }
.field textarea { min-height: 138px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--brand-2); box-shadow: 0 0 0 3px rgba(15,107,90,.12); }
.action-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 18px; }
.box, .status-box { padding: 12px 14px; border-radius: 6px; margin: 0 0 16px; border: 1px solid var(--line); background: #fff7e8; color: #6e4813; }
.success-box { background: #ecf8f3; border-color: #c9eadc; color: #14614b; }
.alert-box { background: #fff1ed; border-color: #f1c9bd; color: #8a301c; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.data-table { width: 100%; min-width: 720px; border-collapse: collapse; }
.data-table th, .data-table td { padding: 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.data-table th { color: #4b5563; background: var(--surface-2); white-space: nowrap; }
.data-table tr:last-child td { border-bottom: 0; }
.cart-item { display: flex; align-items: center; gap: 10px; min-width: 240px; }
.cart-item img { width: 56px; height: 56px; object-fit: contain; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.qty-input { width: 88px; min-height: 40px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; }
.summary-bar { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; padding: 16px 0 0; }
.cart-flow { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-bottom: 18px; }
.cart-step { min-width: 0; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 10px 24px rgba(24,33,42,.05); }
.cart-step strong { display: inline-grid; place-items: center; width: 30px; height: 30px; margin-bottom: 10px; border-radius: 999px; background: var(--brand); color: #fff; }
.cart-step h2, .cart-step h3 { margin: 0 0 5px; font-size: 17px; line-height: 1.3; }
.cart-step p { margin: 0; color: var(--muted); }
.cart-panel { display: grid; gap: 16px; }
.quote-box { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; align-items: center; padding: 16px; border: 1px solid rgba(15,107,90,.18); border-radius: var(--radius); background: linear-gradient(135deg, #f0f7f5, #fff); }
.quote-box h2, .quote-box h3 { margin: 0 0 4px; font-size: 18px; }
.quote-box p { margin: 0; color: var(--muted); }
.quote-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }
.checkout-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(320px, 1.1fr); gap: 18px; align-items: start; }
.checkout-summary { display: grid; gap: 12px; }
.total-card { padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.total-card span { display: block; color: var(--muted); }
.total-card strong { display: block; margin-top: 4px; font-size: 24px; color: var(--brand); }
.checkout-note { padding: 14px; border-radius: var(--radius); background: var(--surface-2); color: #40505b; }
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.info-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; color: var(--muted); }
.info-list strong { color: var(--text); }
.article-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 18px; }
.article-card { display: grid; min-width: 0; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 12px 30px rgba(24,33,42,.07); }
.article-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background: #e8eef0; }
.article-card .body { padding: 16px; }
.article-card h2, .article-card h3 { margin: 0 0 8px; font-size: 19px; line-height: 1.35; }
.article-card p { margin: 0; color: var(--muted); }
.article-page { padding-top: 54px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 820px) 320px; gap: 36px; align-items: start; }
.article-main { min-width: 0; }
.article-hero-panel { min-width: 0; }
.article-content h1 { max-width: 780px; margin: 16px 0 12px; font-size: clamp(38px, 4.4vw, 62px); line-height: 1.06; letter-spacing: 0; text-wrap: balance; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 18px; color: var(--muted); font-size: 14px; }
.article-meta span { display: inline-flex; align-items: center; min-height: 30px; padding: 0 10px; border-radius: 999px; background: var(--surface-2); }
.article-intro { max-width: 760px; margin: 0 0 22px; color: #40505b; font-size: 18px; line-height: 1.75; }
.article-content .hero-image { width: 100%; max-height: 500px; object-fit: cover; border-radius: var(--radius); margin: 0 0 24px; border: 1px solid var(--line); background: #fff; }
.article-body { padding: 34px 42px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 16px 42px rgba(24,33,42,.08); }
.rich-text { color: #26333f; overflow-wrap: anywhere; font-size: 18px; line-height: 1.95; }
.rich-text p { margin: 0 0 1.05em; }
.rich-text h2, .rich-text h3, .rich-text h4 { margin: 1.6em 0 .65em; line-height: 1.3; color: var(--text); }
.rich-text img { max-width: 100%; height: auto; margin: 14px auto 24px; border-radius: 7px; }
.article-sidebar { position: sticky; top: 126px; min-width: 0; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.92); box-shadow: 0 16px 42px rgba(24,33,42,.08); }
.article-sidebar h2 { margin: 0 0 14px; font-size: 20px; line-height: 1.25; }
.article-links { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.article-links a { display: block; padding: 11px 12px; border-radius: 7px; color: #40505b; line-height: 1.5; }
.article-links a:hover { background: var(--surface-2); color: var(--brand); }
.eyebrow { display: inline-flex; align-items: center; min-height: 28px; margin-bottom: 10px; padding: 0 10px; border-radius: 999px; background: var(--surface-2); color: var(--brand); font-size: 12px; font-weight: 800; }
.faq-page { padding-top: 36px; }
.faq-hero { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; align-items: end; margin-bottom: 26px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(135deg, #fff, #f0f7f5); box-shadow: 0 16px 42px rgba(24,33,42,.07); }
.faq-hero p { max-width: 720px; margin: 10px 0 0; color: var(--muted); font-size: 17px; line-height: 1.75; }
.faq-help-card { display: grid; gap: 10px; padding: 18px; border: 1px solid rgba(15,107,90,.18); border-radius: var(--radius); background: rgba(255,255,255,.84); }
.faq-help-card strong { font-size: 19px; line-height: 1.25; }
.faq-help-card span { color: var(--muted); }
.faq-help-card a { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 0 12px; border-radius: 6px; background: var(--brand); color: #fff; font-weight: 800; }
.faq-shell { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 24px; align-items: start; }
.faq-nav { position: sticky; top: 112px; display: grid; gap: 8px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.92); box-shadow: 0 12px 30px rgba(24,33,42,.06); }
.faq-nav strong { font-size: 17px; }
.faq-nav a { display: flex; align-items: center; min-height: 38px; padding: 0 11px; border-radius: 7px; color: #40505b; }
.faq-nav a:hover { background: var(--surface-2); color: var(--brand); }
.faq-nav span { margin-top: 6px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.faq-groups { display: grid; gap: 24px; min-width: 0; }
.faq-group { min-width: 0; scroll-margin-top: 120px; }
.faq-group-head { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 12px; }
.faq-group-head h2 { margin: 0; font-size: clamp(22px, 2.5vw, 30px); line-height: 1.2; }
.faq-group-head p { max-width: 620px; margin: 0; color: var(--muted); }
.faq-list { display: grid; gap: 10px; }
.faq-item { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 10px 28px rgba(24,33,42,.05); overflow: hidden; }
.faq-item[open] { border-color: rgba(15,107,90,.25); box-shadow: 0 16px 36px rgba(24,33,42,.08); }
.faq-item summary { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 14px; align-items: center; min-height: 58px; padding: 15px 18px; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary span { min-width: 0; color: var(--text); font-size: 18px; font-weight: 800; line-height: 1.35; overflow-wrap: anywhere; }
.faq-item summary em { min-width: 48px; min-height: 28px; display: inline-grid; place-items: center; border-radius: 999px; background: var(--surface-2); color: var(--brand); font-size: 0; font-style: normal; font-weight: 800; }
.faq-item summary em::before { content: "\5C55\5F00"; font-size: 13px; }
.faq-item[open] summary em::before { content: "\6536\8D77"; }
.faq-answer { padding: 18px 22px 22px; border-top: 1px solid var(--line); background: #fbfcfc; font-size: 16px; line-height: 1.85; }
.faq-answer * { max-width: 100% !important; }
.faq-answer p { margin: 0 0 1em; }
.faq-answer-block { display: grid; gap: 12px; }
.faq-answer-block p { margin: 0; }
.faq-answer-block ul,
.faq-answer-block ol { margin: 0; padding-left: 1.25em; }
.faq-answer-block li { margin: .4em 0; padding-left: .1em; }
.faq-answer-block strong { color: var(--text); font-weight: 900; }
.faq-contact-note { margin-top: 4px !important; padding: 12px 14px; border: 1px solid rgba(15,107,90,.18); border-radius: 8px; background: #f0f7f5; color: var(--brand); font-weight: 900; line-height: 1.65; }
.faq-answer img { width: auto !important; max-height: 360px; object-fit: contain; background: #fff; }
.faq-answer table { display: block; width: 100% !important; overflow-x: auto; border-collapse: collapse; }
.faq-answer td, .faq-answer th { min-width: 0; }
.account-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.account-nav a { min-height: 38px; display: inline-flex; align-items: center; padding: 0 12px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--brand); }
.site-footer { padding: 38px 0 calc(38px + env(safe-area-inset-bottom)); background: #101820; color: rgba(255,255,255,.78); }
.footer-grid { display: grid; grid-template-columns: 1.2fr repeat(3, 1fr); gap: 24px; }
.site-footer h2, .site-footer h3 { margin: 0 0 10px; color: #fff; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.copyright { border-top: 1px solid rgba(255,255,255,.12); margin-top: 24px; padding-top: 18px; color: rgba(255,255,255,.58); font-size: 13px; }
.app-bottom-nav { display: none; }
@media (max-width: 1020px) {
  .header-inner { grid-template-columns: 1fr auto; }
  .nav { grid-column: 1 / -1; grid-row: auto; justify-content: flex-start; }
  .search { grid-column: 1 / -1; width: 100%; justify-self: stretch; }
}
@media (max-width: 900px) {
  .container { width: min(100% - 28px, var(--max)); }
  .site-header { position: sticky; }
  .header-inner { min-height: 76px; gap: 12px; }
  .brand { grid-template-columns: 42px minmax(0, 1fr); }
  .brand-logo { width: 42px; height: 42px; border-radius: 10px; }
  .brand-title { font-size: 19px; }
  .menu-toggle { display: inline-flex; min-height: 46px; width: 46px; }
  .header-actions .pill-link { display: none; }
  .nav { display: none; }
  body.nav-open .nav { display: grid; grid-template-columns: 1fr; padding: 8px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
  .nav a { width: 100%; justify-content: space-between; min-height: 46px; padding: 0 12px; }
  .search { width: 100%; justify-self: stretch; }
  .hero { min-height: 560px; align-items: end; }
  .hero::before { background: linear-gradient(180deg, rgba(10,18,24,.3), rgba(10,18,24,.86)); }
  .hero-grid, .layout, .product-detail, .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .detail-media { position: static; min-height: 0; max-height: none; }
  .detail-media img { max-height: 560px; }
  .faq-hero { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .faq-shell { grid-template-columns: minmax(0, 1fr); }
  .faq-nav { position: static; grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .faq-nav strong, .faq-nav span { grid-column: 1 / -1; }
  .article-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .article-sidebar { position: static; }
  .hero-grid { padding: 130px 0 36px; }
  .metric-strip, .feature-grid, .process-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cart-flow, .checkout-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; order: 1; }
  .content { order: 2; }
  .category-list { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 3px; scrollbar-width: none; }
  .category-list::-webkit-scrollbar { display: none; }
  .category-list li { flex: 0 0 auto; }
  .category-list a { white-space: nowrap; min-height: 42px; padding: 0 12px; background: #fff; border: 1px solid var(--line); }
}
@media (max-width: 760px) {
  body { padding-bottom: calc(76px + env(safe-area-inset-bottom)); }
  body:has(.mobile-purchase-bar) { padding-bottom: calc(150px + env(safe-area-inset-bottom)); }
  .app-bottom-nav { position: fixed; left: 12px; right: 12px; bottom: max(10px, env(safe-area-inset-bottom)); z-index: 60; display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; width: auto; margin: 0; padding: 5px; border: 1px solid rgba(223,229,232,.9); border-radius: 16px; background: rgba(255,255,255,.96); box-shadow: 0 14px 34px rgba(24,33,42,.15); backdrop-filter: blur(18px); transition: transform .18s ease, opacity .18s ease; }
  .app-tab { min-width: 0; min-height: 44px; display: grid; place-items: center; align-content: center; gap: 1px; border-radius: 12px; color: #5a6672; font-size: 12px; line-height: 1.1; }
  .app-tab strong { position: relative; display: block; width: 22px; height: 22px; font-size: 0; line-height: 1; color: var(--brand); }
  .app-tab strong::before { position: absolute; inset: 0; display: grid; place-items: center; font-size: 20px; font-weight: 900; }
  .app-tab:nth-child(1) strong::before { content: "\2302"; }
  .app-tab:nth-child(2) strong::before { content: "\25a6"; font-size: 18px; }
  .app-tab:nth-child(3) strong::before { content: "\2630"; font-size: 18px; }
  .app-tab:nth-child(4) strong::before { content: "\260e"; font-size: 18px; }
  .app-tab.active, .app-tab:hover { background: var(--surface-2); color: var(--brand); }
  .mobile-purchase-bar { position: fixed; left: 12px; right: 12px; bottom: calc(78px + env(safe-area-inset-bottom)); z-index: 59; display: grid; grid-template-columns: .75fr 1.25fr; gap: 8px; padding: 8px; border: 1px solid rgba(223,229,232,.92); border-radius: 16px; background: rgba(255,255,255,.95); box-shadow: 0 16px 38px rgba(24,33,42,.18); backdrop-filter: blur(18px); transition: transform .18s ease, opacity .18s ease; }
  .mobile-purchase-bar .btn { min-height: 46px; border-radius: 12px; }
  body.form-focus .app-bottom-nav,
  body.form-focus .mobile-purchase-bar { transform: translateY(calc(100% + 32px)); opacity: 0; pointer-events: none; }
}
@media (max-width: 560px) {
  body { font-size: 15px; }
  .brand-subtitle { max-width: 230px; font-size: 11px; }
  .search input { height: 44px; }
  .search button { width: 44px; height: 44px; }
  .hero-grid { padding: 120px 6px 36px; }
  .hero-copy h1 { font-size: 34px; line-height: 1.08; }
  .hero-copy p { font-size: 15px; }
  .hero-cta .btn { width: 100%; }
  .section { padding: 30px 0; }
  .article-page { padding-top: 28px; }
  .article-content h1 { font-size: 34px; line-height: 1.12; }
  .article-intro { font-size: 16px; }
  .article-body { padding: 22px 18px; }
  .rich-text { font-size: 16px; line-height: 1.9; }
  .article-sidebar { padding: 18px; }
  .faq-page { padding-top: 24px; }
  .faq-hero { padding: 20px; }
  .faq-hero p { font-size: 15px; }
  .faq-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 12px; }
  .faq-nav a { justify-content: center; min-height: 40px; border: 1px solid var(--line); background: #fff; }
  .faq-group-head { display: block; }
  .faq-group-head p { margin-top: 5px; }
  .faq-item summary { min-height: 54px; padding: 14px; }
  .faq-item summary span { font-size: 16px; }
  .faq-answer { padding: 15px 14px 18px; font-size: 15px; }
  .section-head { display: block; }
  .shop-tools { grid-template-columns: 1fr; }
  .shop-tools .btn { width: 100%; min-height: 44px; }
  .quote-box { grid-template-columns: 1fr; }
  .quote-actions { justify-content: stretch; }
  .quote-actions .btn { width: 100%; }
  .metric-strip { grid-template-columns: 1fr 1fr; margin-top: -22px; }
  .metric { padding: 14px; }
  .metric strong { font-size: 21px; }
  .feature-grid, .process-list { grid-template-columns: 1fr; }
  .process-step { padding: 18px; }
  .form-grid { grid-template-columns: 1fr; }
  .panel { padding: 16px; }
  .cards-grid, .article-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .product-card .media { min-height: 150px; padding: 14px; }
  .product-card .media::after { bottom: 10px; height: 12px; }
  .product-card img { height: 126px; }
  .product-tag { top: 8px; left: 8px; min-height: 22px; padding: 0 7px; font-size: 11px; }
  .product-card .body { padding: 12px 10px 10px; }
  .product-meta { gap: 4px; margin-bottom: 8px; }
  .product-meta span { min-height: 21px; padding: 0 6px; font-size: 11px; }
  .product-card h3 { font-size: 14px; min-height: 38px; }
  .product-code { font-size: 11px; }
  .price { flex-wrap: wrap; gap: 5px 7px; padding-top: 10px; }
  .price span { font-size: 17px; }
  .price del { font-size: 12px; }
  .price::before { width: 100%; font-size: 11px; }
  .card-actions { grid-template-columns: 1fr; }
  .card-actions { padding: 0 10px 10px; gap: 7px; }
  .card-actions .btn { min-height: 44px; font-size: 13px; }
  .detail-copy { padding: 18px; }
  .detail-specs, .detail-support { grid-template-columns: 1fr; }
  .detail-price-row .price { font-size: 20px; }
  .cart-panel .table-wrap, .checkout-summary .table-wrap { overflow: visible; }
  .cart-panel .data-table, .cart-panel .data-table thead, .cart-panel .data-table tbody, .cart-panel .data-table tr, .cart-panel .data-table td,
  .checkout-summary .data-table, .checkout-summary .data-table thead, .checkout-summary .data-table tbody, .checkout-summary .data-table tr, .checkout-summary .data-table td { display: block; width: 100%; min-width: 0; }
  .cart-panel .data-table thead, .checkout-summary .data-table thead { display: none; }
  .cart-panel .data-table tr, .checkout-summary .data-table tr { padding: 12px; border-bottom: 1px solid var(--line); }
  .cart-panel .data-table tr:last-child, .checkout-summary .data-table tr:last-child { border-bottom: 0; }
  .cart-panel .data-table td, .checkout-summary .data-table td { padding: 7px 0; border-bottom: 0; }
  .cart-panel .data-table td:nth-child(n+2), .checkout-summary .data-table td:nth-child(n+2) { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
  .cart-panel .data-table td:nth-child(2)::before, .checkout-summary .data-table td:nth-child(2)::before { content: "\6570\91CF"; color: var(--muted); font-weight: 700; }
  .cart-panel .data-table td:nth-child(3)::before, .checkout-summary .data-table td:nth-child(3)::before { content: "\53C2\8003\5355\4EF7"; color: var(--muted); font-weight: 700; }
  .cart-panel .data-table td:nth-child(4)::before { content: "\6838\7B97\65B9\5F0F"; color: var(--muted); font-weight: 700; }
  .checkout-summary .data-table td:nth-child(4)::before { content: "\53C2\8003\5C0F\8BA1"; color: var(--muted); font-weight: 700; }
  .cart-panel .data-table td:nth-child(5)::before { content: "\64CD\4F5C"; color: var(--muted); font-weight: 700; }
  .cart-panel .cart-item, .checkout-summary .cart-item { min-width: 0; align-items: center; }
  .cart-panel .cart-item a, .checkout-summary .cart-item a { min-width: 0; overflow-wrap: anywhere; }
  .table-wrap > .data-table { min-width: 640px; }
  .cart-panel .table-wrap > .data-table,
  .checkout-summary .table-wrap > .data-table { min-width: 0; }
}