:root {
  --catalog-blue: #0b4da2;
  --catalog-blue-dark: #082f68;
  --catalog-cyan: #12a8d7;
  --catalog-red: #d62f3a;
  --catalog-ink: #14233a;
  --catalog-muted: #65748a;
  --catalog-line: #dfe7f1;
  --catalog-bg: #f4f8fc;
  --catalog-shadow: 0 18px 48px rgba(13, 51, 94, .1);
}

.product-catalog-page,
.product-spec-page { color: var(--catalog-ink); background: #fff; }

.catalog-hero { position: relative; overflow: hidden; padding: 88px 0 72px; color: #fff; background: linear-gradient(125deg,#071c3d 0%,#0a3d79 57%,#0b5aa6 100%); }
.catalog-hero::before { content: ""; position: absolute; inset: -160px -80px auto auto; width: 440px; height: 440px; border: 76px solid rgba(255,255,255,.035); border-radius: 50%; }
.catalog-hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: linear-gradient(90deg,var(--catalog-red),var(--catalog-cyan)); }
.catalog-hero-inner { position: relative; z-index: 1; text-align: center; }
.catalog-breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; margin-bottom: 28px; color: rgba(255,255,255,.58); font-size: 13px; }
.catalog-breadcrumb a { color: inherit; }
.catalog-breadcrumb strong { color: rgba(255,255,255,.86); font-weight: 600; }
.catalog-eyebrow,
.catalog-section-heading > span { display: block; margin-bottom: 12px; color: #79d8f5; font-size: 12px; line-height: 1; font-weight: 800; letter-spacing: .2em; }
.catalog-eyebrow::before,
.catalog-section-heading > span::before { content: ""; display: inline-block; width: 6px; height: 6px; margin: 0 10px 1px 0; border-radius: 50%; background: var(--catalog-red); box-shadow: 0 0 0 4px rgba(214,47,58,.12); }
.catalog-hero h1 { max-width: 900px; margin: 0 auto; color: #fff; font-size: clamp(36px,4vw,56px); line-height: 1.2; font-weight: 760; }
.catalog-hero > .l-wrap > p { max-width: 850px; margin: 22px auto 0; color: rgba(255,255,255,.74); font-size: 17px; line-height: 1.9; }
.catalog-hero-stats { display: grid; grid-template-columns: repeat(4,1fr); max-width: 1040px; margin: 46px auto 0; overflow: hidden; border: 1px solid rgba(255,255,255,.15); border-radius: 16px; background: rgba(255,255,255,.06); backdrop-filter: blur(8px); }
.catalog-hero-stats div { padding: 23px 18px; border-right: 1px solid rgba(255,255,255,.12); }
.catalog-hero-stats div:last-child { border-right: 0; }
.catalog-hero-stats b { display: block; margin-bottom: 6px; color: #fff; font-size: 23px; }
.catalog-hero-stats span { color: rgba(255,255,255,.62); font-size: 13px; }

.catalog-filterbar { position: sticky; top: 82px; z-index: 50; border-bottom: 1px solid var(--catalog-line); background: rgba(255,255,255,.96); box-shadow: 0 8px 24px rgba(14,49,89,.06); backdrop-filter: blur(12px); }
.catalog-filter-inner { display: flex; align-items: center; gap: 8px; padding-top: 14px; padding-bottom: 14px; overflow-x: auto; scrollbar-width: none; }
.catalog-filter-inner::-webkit-scrollbar { display: none; }
.catalog-filter-inner button { flex: 0 0 auto; padding: 10px 15px; border: 1px solid transparent; border-radius: 8px; color: #53637a; background: transparent; font-size: 14px; font-weight: 650; cursor: pointer; transition: .2s ease; }
.catalog-filter-inner button:hover { color: var(--catalog-blue); background: #eef6fc; }
.catalog-filter-inner button.active { color: #fff; border-color: var(--catalog-blue); background: var(--catalog-blue); box-shadow: 0 8px 20px rgba(11,77,162,.18); }

.catalog-featured,
.catalog-all,
.catalog-guide { padding: 88px 0; }
.catalog-featured { background: linear-gradient(180deg,#fff 0%,#f6f9fc 100%); }
.catalog-all { background: var(--catalog-bg); }
.catalog-guide { background: #fff; }
.catalog-section-heading { max-width: 760px; margin: 0 auto 38px; text-align: center; }
.catalog-section-heading > span { color: #1479c9; }
.catalog-section-heading h2 { margin: 0; color: #0b2345; font-size: clamp(30px,3vw,42px); line-height: 1.2; font-weight: 750; }
.catalog-section-heading h2::after { content: ""; display: block; width: 58px; height: 4px; margin: 14px auto 0; border-radius: 5px; background: linear-gradient(90deg,var(--catalog-blue) 0 72%,var(--catalog-red) 72% 100%); }
.catalog-section-heading p { margin: 14px auto 0; color: var(--catalog-muted); font-size: 16px; line-height: 1.8; }
.catalog-section-heading.align-left { max-width: none; margin-right: 0; margin-left: 0; text-align: left; }
.catalog-section-heading.align-left h2::after { margin-left: 0; }

.catalog-featured-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; }
.catalog-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; }
.catalog-count { display: flex; align-items: baseline; justify-content: flex-end; gap: 7px; margin: -20px 0 20px; color: var(--catalog-muted); }
.catalog-count strong { color: var(--catalog-red); font-size: 27px; }
.catalog-count span { font-size: 13px; }
.catalog-card { display: flex; min-width: 0; overflow: hidden; flex-direction: column; border: 1px solid var(--catalog-line); border-radius: 18px; background: #fff; box-shadow: 0 13px 38px rgba(13,49,90,.08); transition: transform .28s ease,border-color .28s ease,box-shadow .28s ease; }
.catalog-card:hover { transform: translateY(-6px); border-color: rgba(11,77,162,.32); box-shadow: 0 22px 52px rgba(13,49,90,.14); }
.catalog-card[hidden] { display: none; }
.catalog-card-media { position: relative; display: flex; height: 238px; align-items: center; justify-content: center; overflow: hidden; background: radial-gradient(circle at 70% 25%,#fff 0,#edf4fa 58%,#e3edf6 100%); }
.catalog-card-media::after { content: ""; position: absolute; right: -38px; bottom: -58px; width: 150px; height: 150px; border: 24px solid rgba(18,168,215,.06); border-radius: 50%; }
.catalog-card-media img { position: relative; z-index: 1; width: 88%; height: 205px; object-fit: contain; transition: transform .3s ease; }
.catalog-card:hover .catalog-card-media img { transform: scale(1.035); }
.catalog-card-category { position: absolute; top: 17px; left: 17px; z-index: 3; padding: 6px 10px; border: 1px solid rgba(255,255,255,.75); border-radius: 99px; color: #0d63ad; background: rgba(255,255,255,.88); box-shadow: 0 5px 16px rgba(13,49,90,.1); font-size: 11px; font-weight: 750; }
.product-model-visual { position: relative; z-index: 1; display: flex; width: 84%; height: 76%; flex-direction: column; align-items: center; justify-content: center; border: 1px solid rgba(11,77,162,.13); border-radius: 14px; background: linear-gradient(140deg,#fff,#eef5fb); color: #0b376e; text-align: center; box-shadow: inset 0 0 0 7px rgba(255,255,255,.54); }
.product-model-visual::before { content: ""; width: 40px; height: 3px; margin-bottom: 17px; background: var(--catalog-red); }
.product-model-visual span { margin-bottom: 7px; color: #3f719f; font-size: 11px; font-weight: 700; letter-spacing: .1em; }
.product-model-visual strong { font-size: 31px; line-height: 1; letter-spacing: -.03em; }
.product-model-visual i { margin-top: 11px; color: #8191a5; font-size: 9px; font-style: normal; letter-spacing: .15em; }
.catalog-card-body { display: flex; flex: 1; flex-direction: column; padding: 24px 23px 25px; }
.catalog-card-model { color: #1479c9; font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.catalog-card h2 { min-height: 55px; margin: 8px 0 10px; font-size: 20px; line-height: 1.4; }
.catalog-card h2 a { color: #0b2345; }
.catalog-card-body > p { display: -webkit-box; min-height: 69px; margin: 0 0 18px; overflow: hidden; color: #67758a; font-size: 13px; line-height: 1.75; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }
.catalog-card-specs { display: grid; gap: 8px; margin: auto 0 0; }
.catalog-card-specs div { display: grid; grid-template-columns: 48px 1fr; gap: 8px; align-items: start; }
.catalog-card-specs dt { color: #8a96a7; font-size: 12px; }
.catalog-card-specs dd { margin: 0; color: #33455d; font-size: 12px; line-height: 1.55; font-weight: 650; }
.catalog-card-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 20px; padding-top: 18px; border-top: 1px solid #e7edf4; }
.catalog-card-actions a { color: var(--catalog-blue); font-size: 13px; font-weight: 750; }
.catalog-card-actions a:last-child { padding: 8px 11px; border: 1px solid rgba(214,47,58,.32); border-radius: 7px; color: var(--catalog-red); }
.catalog-card-actions b { display: inline-block; margin-left: 4px; transition: transform .2s ease; }
.catalog-card-actions a:hover b { transform: translateX(3px); }
.catalog-empty { padding: 50px 20px; border: 1px dashed #c9d6e4; border-radius: 14px; color: var(--catalog-muted); background: #fff; text-align: center; }

.catalog-guide-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.catalog-guide-grid article { position: relative; padding: 28px 25px 30px; overflow: hidden; border: 1px solid var(--catalog-line); border-top: 3px solid var(--catalog-red); border-radius: 16px; background: linear-gradient(145deg,#fff,#f7faff); box-shadow: 0 12px 34px rgba(15,49,88,.07); }
.catalog-guide-grid b { position: absolute; top: 20px; right: 20px; color: rgba(214,47,58,.18); font-size: 31px; }
.catalog-guide-grid h3 { margin: 18px 0 11px; color: #0b376e; font-size: 20px; }
.catalog-guide-grid p { margin: 0; color: var(--catalog-muted); font-size: 14px; line-height: 1.75; }

.catalog-cta { padding: 50px 0; color: #fff; background: linear-gradient(120deg,#0b4da2,#083b7d 65%,#082f68); }
.catalog-cta .l-wrap { display: flex; align-items: center; justify-content: space-between; gap: 42px; }
.catalog-cta span { display: block; margin-bottom: 9px; color: #84daf6; font-size: 11px; font-weight: 800; letter-spacing: .18em; }
.catalog-cta h2 { margin: 0; color: #fff; font-size: clamp(25px,2.7vw,36px); line-height: 1.3; }
.catalog-cta p { margin: 10px 0 0; color: rgba(255,255,255,.68); }
.catalog-cta .l-wrap > a { flex: 0 0 auto; padding: 14px 22px; border: 1px solid var(--catalog-red); border-radius: 9px; color: #fff; background: var(--catalog-red); font-weight: 750; transition: .2s ease; }
.catalog-cta .l-wrap > a:hover { transform: translateY(-2px); color: var(--catalog-blue-dark); border-color: #fff; background: #fff; }

/* Product detail */
.spec-hero { padding: 54px 0 74px; color: #fff; background: linear-gradient(135deg,#071b39,#0a376c 62%,#0a5297); }
.spec-hero-grid { display: grid; grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); gap: 58px; align-items: center; }
.spec-hero-media { display: flex; min-height: 460px; align-items: center; justify-content: center; padding: 32px; border: 1px solid rgba(255,255,255,.14); border-radius: 20px; background: rgba(255,255,255,.96); box-shadow: 0 24px 60px rgba(0,12,30,.28); }
.spec-hero-media img { width: 100%; height: 395px; object-fit: contain; }
.spec-hero-media .product-model-visual { width: 100%; height: 395px; background: linear-gradient(145deg,#fff,#eaf3fb); }
.spec-hero-content h1 { margin: 0; color: #fff; font-size: clamp(34px,3.6vw,50px); line-height: 1.25; }
.spec-hero-content > p { margin: 22px 0 0; color: rgba(255,255,255,.76); font-size: 16px; line-height: 1.9; }
.spec-quick-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin-top: 28px; }
.spec-quick-grid div { padding: 16px 17px; border: 1px solid rgba(255,255,255,.13); border-radius: 10px; background: rgba(255,255,255,.07); }
.spec-quick-grid span { display: block; margin-bottom: 7px; color: rgba(255,255,255,.55); font-size: 12px; }
.spec-quick-grid strong { color: #fff; font-size: 14px; line-height: 1.5; }
.spec-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.spec-hero-actions a { min-width: 150px; padding: 13px 18px; border: 1px solid rgba(255,255,255,.55); border-radius: 8px; color: #fff; text-align: center; font-weight: 700; }
.spec-hero-actions a:first-child { border-color: var(--catalog-red); background: var(--catalog-red); }
.spec-content { padding: 88px 0; background: var(--catalog-bg); }
.spec-content-grid { display: grid; grid-template-columns: minmax(0,1.45fr) minmax(300px,.55fr); gap: 34px; align-items: start; }
.spec-main,
.spec-side-card,
.spec-source-card { border: 1px solid var(--catalog-line); border-radius: 18px; background: #fff; box-shadow: var(--catalog-shadow); }
.spec-main { padding: 34px; }
.spec-table-wrap { overflow-x: auto; border: 1px solid var(--catalog-line); border-radius: 12px; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table tr:nth-child(even) { background: #f7f9fc; }
.spec-table th,
.spec-table td { padding: 14px 17px; border-bottom: 1px solid #e6edf4; text-align: left; vertical-align: top; font-size: 14px; line-height: 1.65; }
.spec-table tr:last-child th,
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table th { width: 30%; color: #34526f; font-weight: 750; }
.spec-table td { color: #5d6a7c; }
.spec-sidebar { display: grid; gap: 20px; }
.spec-side-card,
.spec-source-card { padding: 27px; }
.spec-side-card > span { color: #1479c9; font-size: 11px; font-weight: 800; letter-spacing: .15em; }
.spec-side-card h2 { margin: 9px 0 18px; color: #0b2345; font-size: 24px; }
.spec-side-card ul { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.spec-side-card li { position: relative; padding-left: 18px; color: #607086; font-size: 13px; line-height: 1.75; }
.spec-side-card li::before { content: ""; position: absolute; top: .72em; left: 0; width: 7px; height: 7px; border-radius: 50%; background: var(--catalog-red); }
.spec-source-card { display: grid; grid-template-columns: 76px 1fr; gap: 12px 11px; }
.spec-source-card b { color: #8a96a7; font-size: 12px; }
.spec-source-card span,
.spec-source-card a { color: #33485f; font-size: 12px; line-height: 1.65; overflow-wrap: anywhere; }

@media (max-width: 1024px) {
  .catalog-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .catalog-featured-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .catalog-featured-grid .featured-card:last-child { grid-column: 1 / -1; max-width: calc(50% - 11px); margin: auto; }
  .catalog-guide-grid { grid-template-columns: repeat(2,1fr); }
  .spec-hero-grid { gap: 34px; }
  .spec-content-grid { grid-template-columns: 1fr; }
  .spec-sidebar { grid-template-columns: 1.35fr .65fr; }
}

@media (max-width: 767px) {
  .catalog-hero { padding: 58px 0 48px; }
  .catalog-hero h1 { font-size: 32px; }
  .catalog-hero > .l-wrap > p { font-size: 15px; line-height: 1.75; }
  .catalog-breadcrumb { margin-bottom: 23px; }
  .catalog-hero-stats { grid-template-columns: repeat(2,1fr); margin-top: 32px; }
  .catalog-hero-stats div { padding: 17px 12px; border-bottom: 1px solid rgba(255,255,255,.12); }
  .catalog-hero-stats div:nth-child(2) { border-right: 0; }
  .catalog-hero-stats div:nth-child(n+3) { border-bottom: 0; }
  .catalog-hero-stats b { font-size: 18px; }
  .catalog-filterbar { top: 66px; }
  .catalog-featured,
  .catalog-all,
  .catalog-guide,
  .spec-content { padding: 56px 0; }
  .catalog-section-heading { margin-bottom: 28px; }
  .catalog-section-heading h2 { font-size: 29px; }
  .catalog-section-heading p { padding: 0 7px; font-size: 14px; line-height: 1.7; }
  .catalog-featured-grid,
  .catalog-grid,
  .catalog-guide-grid { grid-template-columns: 1fr; }
  .catalog-featured-grid .featured-card:last-child { grid-column: auto; max-width: none; }
  .catalog-card-media { height: 218px; }
  .catalog-card-media img { height: 187px; }
  .catalog-card h2 { min-height: 0; }
  .catalog-card-body > p { min-height: 0; -webkit-line-clamp: 2; }
  .catalog-count { margin-top: -12px; }
  .catalog-cta { padding: 42px 0; text-align: center; }
  .catalog-cta .l-wrap { flex-direction: column; gap: 23px; }
  .catalog-cta p { font-size: 14px; line-height: 1.7; }
  .catalog-cta .l-wrap > a { width: 100%; }
  .spec-hero { padding: 32px 0 56px; }
  .spec-hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .spec-hero-media { min-height: 310px; padding: 20px; }
  .spec-hero-media img,
  .spec-hero-media .product-model-visual { height: 275px; }
  .spec-hero-content h1 { font-size: 31px; }
  .spec-hero-content > p { font-size: 14px; line-height: 1.8; }
  .spec-quick-grid { gap: 9px; }
  .spec-quick-grid div { padding: 13px; }
  .spec-hero-actions a { flex: 1; min-width: 0; }
  .spec-main { padding: 23px 18px; }
  .spec-table th,
  .spec-table td { padding: 12px 13px; font-size: 13px; }
  .spec-table th { width: 35%; }
  .spec-sidebar { grid-template-columns: 1fr; }
}