/*
Theme Name: Rui Shi Industrial
Theme URI: https://ruishileather.com
Author: Rui Shi Leather Co., Ltd.
Description: A custom B2B manufacturing theme for Rui Shi Leather.
Version: 1.2.0
Text Domain: ruishi
*/

:root {
  --ink: #141719;
  --paper: #f7f7f5;
  --white: #ffffff;
  --forest: #1f3a32;
  --forest-2: #2d5147;
  --leather: #9c5a2e;
  --oxblood: #74352d;
  --steel: #bcc1bd;
  --line: #d8dbd7;
  --muted: #606965;
  --max: 1240px;
  --sans: "Aptos", "Segoe UI", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .18em; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
:focus-visible { outline: 3px solid #e1a36f; outline-offset: 3px; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 999; background: var(--white); padding: 12px 18px; }
.skip-link:focus { top: 16px; }

.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid rgba(255,255,255,.13); background: rgba(20,23,25,.96); color: white; backdrop-filter: blur(12px); }
.header-inner { min-height: 74px; display: grid; grid-template-columns: 250px 1fr auto; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 34px; height: 34px; border: 1px solid #d6b08e; display: grid; place-items: center; font-weight: 800; letter-spacing: -.08em; color: #ebc39f; }
.brand-name { display: block; font-size: 15px; font-weight: 760; line-height: 1.15; }
.brand-note { display: block; margin-top: 3px; color: #adb8b3; font-size: 11px; letter-spacing: .05em; }
.main-nav ul { display: flex; justify-content: center; gap: 26px; margin: 0; padding: 0; list-style: none; }
.main-nav a { color: #e9ecea; font-size: 14px; text-decoration: none; }
.main-nav li { position: relative; }
.submenu { position: absolute; top: calc(100% + 24px); left: -24px; display: grid; width: 235px; padding: 12px; border: 1px solid #414846; background: var(--ink); box-shadow: 0 16px 35px rgba(0,0,0,.28); opacity: 0; visibility: hidden; transform: translateY(-5px); transition: opacity .18s ease, transform .18s ease, visibility .18s; }
.submenu::before { content: ""; position: absolute; top: -25px; right: 0; left: 0; height: 25px; }
.submenu a { padding: 9px 11px; color: #dce2df; }
.submenu a:last-child { margin-top: 6px; border-top: 1px solid #3b4240; padding-top: 14px; color: #e3ae81; }
.has-submenu:hover .submenu, .has-submenu:focus-within .submenu { opacity: 1; visibility: visible; transform: none; }
.mobile-nav { display: none; position: relative; }
.mobile-nav summary { min-width: 64px; padding: 9px 12px; border: 1px solid #59615e; cursor: pointer; list-style: none; font-size: 13px; font-weight: 700; }
.mobile-nav summary::-webkit-details-marker { display: none; }
.mobile-nav > div { position: absolute; top: calc(100% + 12px); right: 0; display: grid; width: min(300px, calc(100vw - 28px)); padding: 12px; border: 1px solid #414846; background: var(--ink); box-shadow: 0 18px 40px rgba(0,0,0,.3); }
.mobile-nav a { padding: 11px 10px; border-bottom: 1px solid #303735; color: white; text-decoration: none; }
.header-cta, .button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 20px; border: 1px solid transparent; background: var(--leather); color: white; font-weight: 700; text-decoration: none; cursor: pointer; }
.header-cta:hover, .button:hover { background: #b66b37; }
.button.secondary { border-color: var(--ink); background: transparent; color: var(--ink); }
.button.secondary:hover { background: var(--ink); color: white; }

.hero { position: relative; overflow: hidden; min-height: 680px; background: var(--ink); color: white; }
.hero-media { position: absolute; inset: 0; }
.hero-media video { width: 100%; height: 100%; object-fit: cover; object-position: center; filter: saturate(.78) contrast(1.08); }
.hero-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(15,20,20,.97) 0%, rgba(15,20,20,.85) 40%, rgba(15,20,20,.24) 69%, rgba(15,20,20,.08) 100%); }
.hero-inner { position: relative; min-height: 680px; display: grid; grid-template-columns: minmax(0, 590px) 1fr; align-items: center; padding-block: 90px 72px; }
.hero-copy { padding-left: 26px; border-left: 5px solid var(--leather); }
.hero h1 { max-width: 760px; margin: 0 0 24px; font-size: clamp(48px, 6.2vw, 88px); line-height: .96; letter-spacing: -.055em; font-weight: 780; }
.hero p { max-width: 650px; margin: 0 0 30px; color: #d3dad6; font-size: clamp(18px, 2vw, 22px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero .button.secondary { border-color: #98a29e; color: white; }
.hero .button.secondary:hover { background: white; color: var(--ink); }
.spec-line { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 38px; color: #acb7b2; font-size: 13px; }
.spec-line span { display: inline-flex; align-items: center; gap: 8px; }
.spec-line span::before { content: ""; width: 6px; height: 6px; background: var(--leather); }

.proof-bar { border-bottom: 1px solid var(--line); background: white; }
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-item { min-height: 124px; padding: 26px 28px; border-left: 1px solid var(--line); }
.proof-item:last-child { border-right: 1px solid var(--line); }
.proof-item strong { display: block; margin-bottom: 3px; font-size: 18px; }
.proof-item span { color: var(--muted); font-size: 14px; }

.factory-section { background: #eef0ed; }
.factory-feature { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(300px, .75fr); min-height: 560px; background: white; }
.factory-lead { margin: 0; overflow: hidden; }
.factory-lead img { width: 100%; height: 100%; min-height: 560px; object-fit: cover; }
.factory-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(42px, 6vw, 78px); }
.factory-copy h2 { margin: 0 0 24px; font-size: clamp(40px, 5vw, 65px); line-height: .98; letter-spacing: -.045em; }
.factory-copy p { margin: 0; color: var(--muted); font-size: 17px; }
.text-link { width: fit-content; margin-top: 34px; color: var(--leather); font-size: 14px; font-weight: 760; }
.factory-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 54px; }
.factory-strip figure { min-width: 0; margin: 0; }
.factory-image { aspect-ratio: 4 / 3; overflow: hidden; background: #d9ddd8; }
.factory-image img { width: 100%; height: 100%; object-fit: cover; }
.factory-strip-inspection .factory-image img { object-position: 10% center; }
.factory-strip figcaption { display: grid; gap: 2px; padding: 16px 0 0; border-top: 3px solid var(--ink); }
.factory-strip figcaption strong { font-size: 17px; }
.factory-strip figcaption span { color: var(--muted); font-size: 13px; }

.section { padding: 105px 0; }
.section.white { background: white; }
.section.dark { background: var(--forest); color: white; }
.section-heading { display: grid; grid-template-columns: minmax(240px, .75fr) 1.25fr; gap: 70px; align-items: end; margin-bottom: 54px; }
.section-heading > *, .hero-copy { min-width: 0; }
.section-heading h2 { margin: 0; font-size: clamp(38px, 5vw, 64px); line-height: 1; letter-spacing: -.045em; }
.section-heading p { max-width: 680px; margin: 0; color: var(--muted); font-size: 18px; }
.dark .section-heading p { color: #c2d0ca; }
.kicker { display: block; margin-bottom: 15px; color: var(--leather); font-size: 13px; font-weight: 800; letter-spacing: .04em; }
.dark .kicker { color: #e6b083; }

.product-grid { display: grid; grid-template-columns: repeat(12, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.product { grid-column: span 4; min-height: 260px; padding: 34px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: white; }
.product:nth-child(1), .product:nth-child(5) { grid-column: span 8; }
.product-code { display: inline-block; margin-bottom: 58px; color: var(--leather); font-size: 12px; font-weight: 800; }
.product h3 { margin: 0 0 8px; font-size: 26px; line-height: 1.12; }
.product p { max-width: 540px; margin: 0; color: var(--muted); font-size: 15px; }
.material-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.material-row span { border: 1px solid var(--line); padding: 4px 8px; color: #505753; font-size: 12px; }

.pathways { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.22); border-left: 1px solid rgba(255,255,255,.22); }
.pathway { padding: 34px 28px 40px; border-right: 1px solid rgba(255,255,255,.22); border-bottom: 1px solid rgba(255,255,255,.22); }
.pathway h3 { margin: 0 0 10px; font-size: 24px; }
.pathway p { margin: 0; color: #c2d0ca; font-size: 15px; }
.pathway dl { margin: 26px 0 0; }
.pathway dt { color: #89a99e; font-size: 12px; font-weight: 700; }
.pathway dd { margin: 2px 0 15px; font-size: 14px; }

.process { counter-reset: process; border-top: 1px solid var(--line); }
.process-step { counter-increment: process; display: grid; grid-template-columns: 90px minmax(170px, .65fr) 1.35fr 220px; gap: 24px; align-items: baseline; padding: 23px 0; border-bottom: 1px solid var(--line); }
.process-step::before { content: counter(process, decimal-leading-zero); color: var(--leather); font-weight: 800; }
.process-step h3 { margin: 0; font-size: 21px; }
.process-step p { margin: 0; color: var(--muted); font-size: 15px; }
.process-step strong { color: var(--forest); font-size: 13px; }

.quality-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 70px; }
.quality-intro { position: sticky; top: 115px; align-self: start; }
.quality-intro h2 { margin: 0 0 20px; font-size: clamp(38px, 5vw, 62px); line-height: 1; letter-spacing: -.04em; }
.quality-intro p { color: #c2d0ca; }
.check-groups { border-top: 1px solid rgba(255,255,255,.23); }
.check-group { display: grid; grid-template-columns: 150px 1fr; gap: 30px; padding: 28px 0; border-bottom: 1px solid rgba(255,255,255,.23); }
.check-group h3 { margin: 0; font-size: 18px; }
.check-group ul { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.check-group li { border: 1px solid rgba(255,255,255,.23); padding: 7px 10px; color: #d9e1de; font-size: 13px; }
.evidence-note { margin-top: 30px; padding: 24px; border-left: 4px solid #d89a66; background: rgba(0,0,0,.14); color: #d9e1de; font-size: 14px; }
.quality-evidence { margin: 30px 0 0; border: 1px solid rgba(255,255,255,.2); background: #f2efe7; color: var(--ink); }
.quality-evidence img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.quality-evidence figcaption { display: grid; grid-template-columns: 150px 1fr; gap: 30px; padding: 20px 22px; }
.quality-evidence figcaption span { color: var(--muted); font-size: 13px; }

.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.resource { min-height: 230px; padding: 28px; border: 1px solid var(--line); background: white; }
.resource small { color: var(--leather); font-weight: 800; }
.resource h3 { margin: 44px 0 10px; font-size: 24px; line-height: 1.15; }
.resource p { margin: 0; color: var(--muted); font-size: 15px; }

.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; justify-content: space-between; gap: 20px; padding: 22px 0; font-weight: 750; cursor: pointer; }
.faq-list summary::after { content: "+"; color: var(--leather); font-size: 24px; }
.faq-list details[open] summary::after { content: "–"; }
.faq-list details p { max-width: 820px; margin: 0; padding: 0 0 25px; color: var(--muted); }

.rfq-section { background: #e7e9e5; }
.rfq-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 80px; }
.rfq-copy h2 { margin: 0 0 18px; font-size: clamp(42px, 5vw, 68px); line-height: .98; letter-spacing: -.05em; }
.rfq-copy p { color: var(--muted); }
.rfq-list { margin: 28px 0 0; padding: 0; list-style: none; }
.rfq-list li { padding: 10px 0; border-bottom: 1px solid #cdd1cc; font-size: 14px; }
.rfq-form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; font-weight: 750; }
.field input, .field textarea, .field select { width: 100%; border: 1px solid #aeb5af; border-radius: 0; background: white; padding: 13px 14px; color: var(--ink); }
.field textarea { min-height: 160px; resize: vertical; }
.hp-field { position: absolute !important; left: -9999px !important; }
.form-note { grid-column: 1/-1; margin: 0; color: var(--muted); font-size: 12px; }
.form-success { grid-column: 1/-1; padding: 13px 16px; background: #d6eadf; color: #173e2f; font-weight: 700; }

.content-hero { padding: 112px 0 86px; background: var(--ink); color: white; }
.content-hero-inner { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: 70px; align-items: end; }
.content-kicker { grid-column: 1 / -1; margin-bottom: -42px; color: #dfaa7d; font-size: 13px; font-weight: 800; }
.content-hero h1 { max-width: 900px; margin: 0; font-size: clamp(46px, 7vw, 86px); line-height: .98; letter-spacing: -.05em; }
.content-hero p { max-width: 510px; margin: 0; color: #c4ceca; font-size: 18px; }
.page-content { padding: 0; }
.page-content > :not(.rs-page) { width: min(calc(100% - 40px), 860px); margin-inline: auto; }
.page-content > :first-child:not(.rs-page) { margin-top: 75px; }
.page-content > :last-child:not(.rs-page) { margin-bottom: 100px; }
.rs-section { padding: 94px 0; }
.rs-section.white { background: white; }
.rs-section.soft { background: #eef0ed; }
.rs-section.dark { background: var(--forest); color: white; }
.rs-wrap { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.rs-intro-grid, .rs-split { display: grid; grid-template-columns: minmax(0,.82fr) minmax(0,1.18fr); gap: 80px; align-items: start; }
.rs-section h2 { margin: 0 0 22px; font-size: clamp(38px, 5vw, 62px); line-height: 1; letter-spacing: -.04em; }
.rs-section h3 { margin: 0 0 10px; font-size: 23px; line-height: 1.15; }
.rs-section p { color: var(--muted); }
.rs-section.dark p { color: #c4ceca; }
.rs-lead { margin: 0; color: #26302c; font-family: var(--serif); font-size: clamp(25px, 3.2vw, 39px); line-height: 1.27; }
.rs-copy { max-width: 720px; }
.rs-copy p:first-child { margin-top: 0; }
.rs-link-grid { display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.rs-link-card { min-height: 230px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: white; text-decoration: none; }
.rs-link-card small { display: block; margin-bottom: 52px; color: var(--leather); font-weight: 800; }
.rs-link-card p { margin: 0; font-size: 14px; }
.rs-link-card:hover h3 { color: var(--leather); }
.rs-spec-list { border-top: 1px solid var(--line); }
.rs-spec-row { display: grid; grid-template-columns: minmax(160px,.55fr) 1.45fr; gap: 30px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.rs-spec-row strong { color: var(--forest); }
.rs-spec-row span { color: var(--muted); }
.rs-steps { display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid rgba(255,255,255,.23); border-left: 1px solid rgba(255,255,255,.23); }
.rs-step { min-height: 245px; padding: 30px 26px; border-right: 1px solid rgba(255,255,255,.23); border-bottom: 1px solid rgba(255,255,255,.23); }
.rs-step small { display: block; margin-bottom: 54px; color: #e3ae81; font-weight: 800; }
.rs-step p { margin-bottom: 0; font-size: 14px; }
.rs-tag-list { display: flex; flex-wrap: wrap; gap: 9px; margin: 24px 0 0; padding: 0; list-style: none; }
.rs-tag-list li { padding: 7px 10px; border: 1px solid #bbc1bc; color: #39433e; font-size: 13px; }
.rs-faq { border-top: 1px solid var(--line); }
.rs-faq details { border-bottom: 1px solid var(--line); }
.rs-faq summary { padding: 20px 0; font-weight: 750; cursor: pointer; }
.rs-faq p { max-width: 820px; margin-top: 0; padding-bottom: 20px; }
.rs-banner { margin: 0; }
.rs-banner img { width: 100%; max-height: 610px; object-fit: cover; }
.rs-cta { padding: 75px 0; background: var(--leather); color: white; }
.rs-cta-inner { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.rs-cta h2 { margin: 0; max-width: 800px; color: white; }
.rs-cta .button { background: white; color: var(--ink); }
.post-list article { padding: 28px 0; border-bottom: 1px solid var(--line); }
.post-list h2 { margin: 0 0 8px; font-size: 30px; }
.post-list h2 a { text-decoration: none; }

.site-footer { padding: 70px 0 30px; background: var(--ink); color: white; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 60px; }
.footer-grid h2 { max-width: 520px; margin: 0; font-size: 36px; line-height: 1.1; }
.footer-grid h3 { margin: 0 0 14px; color: #9daba5; font-size: 13px; }
.footer-grid ul { margin: 0; padding: 0; list-style: none; }
.footer-grid li { margin: 7px 0; }
.footer-grid a { color: #dfe4e1; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 55px; padding-top: 20px; border-top: 1px solid #343b3b; color: #919b97; font-size: 12px; }

@media (max-width: 980px) {
  .header-inner { grid-template-columns: 1fr auto; }
  .main-nav { display: none; }
  .mobile-nav { display: block; }
  .header-cta { display: none; }
  .hero-inner { grid-template-columns: 1fr; }
  .proof-grid, .pathways { grid-template-columns: repeat(2, 1fr); }
  .section-heading, .quality-layout, .rfq-layout { grid-template-columns: 1fr; gap: 32px; }
  .quality-intro { position: static; }
  .product, .product:nth-child(1), .product:nth-child(5) { grid-column: span 6; }
  .process-step { grid-template-columns: 60px 1fr; }
  .process-step p, .process-step strong { grid-column: 2; }
  .resource-grid { grid-template-columns: 1fr 1fr; }
  .factory-feature { grid-template-columns: 1fr; }
  .factory-lead img { min-height: 430px; }
  .content-hero-inner, .rs-intro-grid, .rs-split { grid-template-columns: 1fr; gap: 32px; }
  .content-kicker { margin-bottom: 0; }
  .rs-link-grid { grid-template-columns: repeat(2,1fr); }
  .rs-steps { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { width: min(calc(100% - 28px), var(--max)); }
  .header-inner { min-height: 66px; }
  .brand-note { display: none; }
  .hero, .hero-inner { min-height: 660px; }
  .hero-inner { align-items: end; padding-block: 80px 52px; }
  .hero-media video { object-position: 58% center; }
  .hero-media::after { background: linear-gradient(0deg, rgba(15,20,20,.98) 12%, rgba(15,20,20,.75) 66%, rgba(15,20,20,.25) 100%); }
  .hero-copy { padding-left: 16px; }
  .hero h1 { font-size: 49px; }
  .hero h1, .section-heading h2 { overflow-wrap: anywhere; }
  .section { padding: 76px 0; }
  .proof-grid, .pathways, .resource-grid, .footer-grid { grid-template-columns: 1fr; }
  .proof-item:last-child { border-right: 0; }
  .product, .product:nth-child(1), .product:nth-child(5) { grid-column: span 12; }
  .product-code { margin-bottom: 35px; }
  .check-group { grid-template-columns: 1fr; gap: 14px; }
  .factory-copy { padding: 42px 26px; }
  .factory-strip { grid-template-columns: 1fr; gap: 36px; margin-top: 40px; }
  .factory-image { aspect-ratio: 16 / 10; }
  .quality-evidence figcaption { grid-template-columns: 1fr; gap: 8px; }
  .content-hero { padding: 75px 0 58px; }
  .content-hero p { font-size: 16px; }
  .rs-section { padding: 70px 0; }
  .rs-wrap { width: min(calc(100% - 28px), var(--max)); }
  .rs-link-grid, .rs-steps { grid-template-columns: 1fr; }
  .rs-link-card { min-height: 190px; }
  .rs-link-card small, .rs-step small { margin-bottom: 30px; }
  .rs-spec-row { grid-template-columns: 1fr; gap: 5px; }
  .rs-cta-inner { grid-template-columns: 1fr; }
  .rfq-form { grid-template-columns: 1fr; }
  .field { grid-column: 1; }
  .footer-bottom { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}