/* ============================================
   YITAI WORKWEAR - Industrial B2B Trade Site
   Color System: Logo Blue + Safety Orange + Hi-Vis
   ============================================ */

/* 阿里巴巴普惠体 3.0 (Alibaba PuHuiTi 3.0) - 本地字体 */
@font-face {
  font-family: 'Alibaba PuHuiTi 3.0';
  src: url('fonts/AlibabaPuHuiTi-3-55-Regular.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Alibaba PuHuiTi 3.0';
  src: url('fonts/AlibabaPuHuiTi-3-65-Medium.woff2') format('woff2');
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Alibaba PuHuiTi 3.0';
  src: url('fonts/AlibabaPuHuiTi-3-75-SemiBold.woff2') format('woff2');
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Alibaba PuHuiTi 3.0';
  src: url('fonts/AlibabaPuHuiTi-3-85-Bold.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}

:root {
  --navy-900: #051531;
  --navy-800: #0a2e6c;
  --navy-700: #0e3d8c;
  --navy-600: #1550ab;
  --navy-500: #2168c9;
  --orange-600: #e85d04;
  --orange-500: #f48c06;
  --orange-400: #ff9e00;
  --hivis: #c8e600;
  --hivis-dark: #a8c400;
  --gray-50: #f8f9fa;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,.15);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --font-display: 'Alibaba PuHuiTi 3.0', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-heading: 'Alibaba PuHuiTi 3.0', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Alibaba PuHuiTi 3.0', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; overflow-x: hidden; }

body {
  font-family: var(--font-body);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-display); font-weight: 600; line-height: 1.2; text-transform: uppercase; letter-spacing: .5px; }

.container { max-width: 1440px; margin: 0 auto; padding: 0 40px; }
.section { padding: 80px 0; }
.section-title { font-size: 2.2rem; color: var(--navy-800); margin-bottom: 12px; position: relative; display: inline-block; }
.section-title::after { content: ''; position: absolute; bottom: -8px; left: 0; width: 60px; height: 4px; background: var(--orange-500); }
.section-subtitle { color: var(--gray-600); font-size: 1.05rem; margin-top: 16px; max-width: 680px; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .section-title::after { left: 50%; transform: translateX(-50%); }
.section-header .section-subtitle { margin-left: auto; margin-right: auto; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; font-family: var(--font-display); font-size: .95rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; border: none; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition); }
.btn-primary { background: var(--orange-500); color: var(--white); box-shadow: 0 4px 15px rgba(244,140,6,.3); }
.btn-primary:hover { background: var(--orange-600); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(244,140,6,.4); }
.btn-green { background: #18a04b; color: var(--white); box-shadow: 0 4px 15px rgba(24,160,75,.3); }
.btn-green:hover { background: #128a3f; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(24,160,75,.4); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid var(--white); }
.btn-outline:hover { background: var(--white); color: var(--navy-800); }
.btn-navy { background: var(--navy-700); color: var(--white); }
.btn-navy:hover { background: var(--navy-600); transform: translateY(-2px); }
.btn-sm { padding: 10px 20px; font-size: .85rem; }

/* ============ TOP BAR ============ */
.top-bar { background: var(--navy-900); color: var(--gray-400); font-size: .82rem; padding: 8px 0; }
.top-bar .container { display: flex; justify-content: space-between; align-items: center; }
.top-bar a { color: var(--gray-400); }
.top-bar a:hover { color: var(--orange-400); }
.top-bar-left { display: flex; gap: 20px; align-items: center; }
.top-bar-right { display: flex; gap: 16px; align-items: center; }

/* Language Switcher */
.lang-switch { position: relative; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; padding: 4px 10px; border-radius: 4px; transition: background .2s; }
.lang-switch:hover { background: rgba(255,255,255,.08); }
.lang-switch .lang-flag { font-size: 1rem; line-height: 1; }
.lang-switch .lang-label { font-size: .78rem; color: var(--gray-300); font-weight: 500; }
.lang-switch .lang-arrow { width: 0; height: 0; border-left: 4px solid transparent; border-right: 4px solid transparent; border-top: 4px solid var(--gray-500); transition: transform .2s; }
.lang-switch:hover .lang-arrow { transform: rotate(180deg); }
.lang-dropdown { position: absolute; top: 100%; right: 0; margin-top: 8px; background: var(--white); border-radius: 8px; box-shadow: 0 8px 32px rgba(0,0,0,.15); min-width: 160px; padding: 6px 0; opacity: 0; visibility: hidden; transform: translateY(-6px); transition: all .25s ease; z-index: 9999; }
.lang-switch:hover .lang-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-dropdown a { display: flex; align-items: center; gap: 10px; padding: 9px 16px; font-size: .82rem; color: var(--gray-700); text-decoration: none; transition: background .15s; }
.lang-dropdown a:hover { background: var(--gray-50); color: var(--navy-800); }
.lang-dropdown a .lang-flag { font-size: 1.05rem; }
.lang-dropdown a.active { color: var(--orange-500); font-weight: 600; }

/* ============ HEADER / NAV ============ */
.header { background: var(--white); box-shadow: var(--shadow-sm); position: sticky; top: 0; z-index: 1000; }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 90px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-img { height: 58px; width: auto; display: block; transition: var(--transition); }
.logo:hover .logo-img { transform: translateY(-1px); }
.logo-text { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; color: var(--navy-800); text-transform: uppercase; letter-spacing: 1px; }
.logo-text span { color: var(--orange-500); }

.nav-menu { display: flex; align-items: center; gap: 0; }
.nav-item { position: relative; }
.nav-link { display: flex; align-items: center; gap: 4px; padding: 24px 14px; font-family: var(--font-display); font-size: .88rem; font-weight: 500; text-transform: uppercase; letter-spacing: .5px; color: var(--navy-800); transition: var(--transition); white-space: nowrap; }
.nav-link:hover, .nav-item:hover .nav-link, .nav-link.active { color: var(--orange-500); }
.nav-link .arrow { width: 0; height: 0; border-left: 4px solid transparent; border-right: 4px solid transparent; border-top: 5px solid currentColor; transition: var(--transition); }
.nav-item:hover .arrow { transform: rotate(180deg); }

/* Dropdown */
.dropdown { position: absolute; top: 100%; left: 0; min-width: 240px; background: var(--white); box-shadow: var(--shadow-lg); border-top: 3px solid var(--orange-500); border-radius: 0 0 var(--radius-md) var(--radius-md); opacity: 0; visibility: hidden; transform: translateY(10px); transition: var(--transition); z-index: 999; }
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a { display: block; padding: 12px 20px; font-size: .88rem; color: var(--gray-700); border-bottom: 1px solid var(--gray-100); transition: var(--transition); }
.dropdown a:last-child { border-bottom: none; }
.dropdown a:hover { background: var(--gray-50); color: var(--orange-500); padding-left: 26px; }

/* Mobile menu toggle */
.menu-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.menu-toggle span { width: 26px; height: 3px; background: var(--navy-800); border-radius: 2px; transition: var(--transition); }

/* ============ HERO BANNER SLIDER ============ */
.hero-slider { position: relative; width: 100%; height: 100vh; min-height: 600px; max-height: 900px; overflow: hidden; }
.slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease; }
.slide.active { opacity: 1; }
.slide-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.slide-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(5,21,49,.85) 0%, rgba(14,61,140,.6) 50%, rgba(5,21,49,.4) 100%); }
.slide-content { position: relative; z-index: 2; height: 100%; width: 100%; max-width: 1440px; margin: 0 auto; display: flex; flex-direction: column; justify-content: center; padding: 0 40px; }
.slide-tag { display: inline-block; background: var(--orange-500); color: var(--white); padding: 6px 16px; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 20px; border-radius: 2px; }
.slide-title { font-size: 3.2rem; color: var(--white); margin-bottom: 16px; text-shadow: 0 2px 20px rgba(0,0,0,.3); width: 100%; white-space: nowrap; }
.slide-desc { color: rgba(255,255,255,.85); font-size: 1.1rem; margin-bottom: 32px; line-height: 1.7; }
.slide-btns { display: flex; gap: 16px; flex-wrap: wrap; }

.slider-dots { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); display: flex; gap: 12px; z-index: 10; }
.slider-dot { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,.4); cursor: pointer; transition: var(--transition); }
.slider-dot.active { background: var(--orange-500); transform: scale(1.3); }
.slider-arrows { position: absolute; top: 50%; width: 100%; display: flex; justify-content: space-between; padding: 0 24px; transform: translateY(-50%); z-index: 10; pointer-events: none; }
.slider-arrow { width: 50px; height: 50px; background: rgba(255,255,255,.15); backdrop-filter: blur(4px); border: 1px solid rgba(255,255,255,.2); border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: var(--transition); pointer-events: all; }
.slider-arrow:hover { background: var(--orange-500); border-color: var(--orange-500); }
.slider-arrow svg { width: 20px; height: 20px; fill: var(--white); }

/* ============ QUICK PRODUCT NAV ============ */
.quick-nav { background: var(--navy-800); padding: 48px 0; }
.quick-nav-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.quick-nav-item { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 24px 12px; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius-md); transition: var(--transition); cursor: pointer; }
.quick-nav-item:hover { background: rgba(244,140,6,.15); border-color: var(--orange-500); transform: translateY(-4px); }
.quick-nav-item .icon { width: 48px; height: 48px; background: var(--orange-500); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.quick-nav-item .icon svg { width: 24px; height: 24px; fill: var(--white); }
.quick-nav-item span { color: var(--white); font-size: .82rem; font-weight: 600; text-align: center; text-transform: uppercase; letter-spacing: .5px; }

/* ============ FACTORY INTRO ============ */
.factory-intro { background: var(--gray-50); }
.factory-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.factory-images { position: relative; }
.factory-img-main { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.factory-img-main img { width: 100%; height: 400px; object-fit: cover; }
.factory-img-badge { position: absolute; bottom: -20px; right: -20px; background: var(--orange-500); color: var(--white); padding: 20px 28px; border-radius: var(--radius-md); text-align: center; box-shadow: var(--shadow-lg); }
.factory-img-badge .num { font-family: var(--font-display); font-size: 2.4rem; font-weight: 700; }
.factory-img-badge .label { font-size: .75rem; text-transform: uppercase; letter-spacing: 1px; }
.factory-text h2 { font-size: 2rem; color: var(--navy-800); margin-bottom: 20px; }
.factory-text p { color: var(--gray-600); margin-bottom: 16px; line-height: 1.8; }
.factory-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px; }
.stat-item { text-align: center; padding: 16px; background: var(--white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.stat-item .num { font-family: var(--font-display); font-size: 1.8rem; color: var(--orange-500); font-weight: 700; }
.stat-item .label { font-size: .78rem; color: var(--gray-600); text-transform: uppercase; margin-top: 4px; }

/* ============ HOT PRODUCTS ============ */
.products-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.product-card { background: var(--white); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid var(--gray-200); }
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--orange-400); }
.product-card-img { position: relative; height: 200px; overflow: hidden; background: var(--gray-100); }
.product-card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.product-card:hover .product-card-img img { transform: scale(1.08); }
.product-card-body { padding: 16px; }
.product-card-body h4 { font-size: .9rem; color: var(--navy-800); margin-bottom: 8px; text-transform: none; letter-spacing: 0; }
.product-card-body p { font-size: .8rem; color: var(--gray-600); margin-bottom: 12px; }
.product-card-body .btn { width: 100%; justify-content: center; padding: 10px; font-size: .8rem; }

/* ============ APPLICATION SCENARIOS ============ */
.scenarios { background: var(--navy-900); }
.scenarios .section-title { color: var(--white); }
.scenarios .section-subtitle { color: var(--gray-400); }
.scenarios .section-title::after { background: var(--orange-500); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scenario-card { position: relative; border-radius: var(--radius-md); overflow: hidden; aspect-ratio: 1 / 1; height: auto; cursor: pointer; }
.scenario-card img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.scenario-card:hover img { transform: scale(1.1); }
.scenario-card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(5,21,49,.9) 0%, transparent 60%); display: flex; flex-direction: column; justify-content: flex-end; padding: 20px; }
.scenario-card-overlay h4 { color: var(--white); font-size: 1rem; margin-bottom: 4px; }
.scenario-card-overlay p { color: var(--gray-400); font-size: .78rem; }
.scenario-card:hover .scenario-card-overlay { background: linear-gradient(to top, rgba(232,93,4,.9) 0%, rgba(232,93,4,.3) 100%); }

/* ============ CORE ADVANTAGES ============ */
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.advantage-card { text-align: center; padding: 40px 24px; background: var(--white); border-radius: var(--radius-md); border: 1px solid var(--gray-200); transition: var(--transition); }
.advantage-card:hover { border-color: var(--orange-400); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.advantage-card .icon { width: 64px; height: 64px; margin: 0 auto 20px; background: linear-gradient(135deg, var(--orange-500), var(--orange-400)); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.advantage-card .icon svg { width: 30px; height: 30px; fill: var(--white); }
.advantage-card h4 { font-size: .95rem; color: var(--navy-800); margin-bottom: 10px; }
.advantage-card p { font-size: .82rem; color: var(--gray-600); line-height: 1.6; }

/* ============ PROJECT CASES ============ */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { background: var(--white); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--gray-200); transition: var(--transition); }
.case-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.case-card-img { aspect-ratio: 4 / 3; height: auto; overflow: hidden; }
.case-card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.case-card:hover .case-card-img img { transform: scale(1.05); }
.case-card-body { padding: 24px; }
.case-card-body .tag { display: inline-block; background: var(--gray-100); color: var(--orange-600); padding: 4px 12px; font-size: .72rem; font-weight: 700; text-transform: uppercase; border-radius: 2px; margin-bottom: 12px; }
.case-card-body h4 { font-size: 1rem; color: var(--navy-800); margin-bottom: 10px; text-transform: none; }
.case-card-body p { font-size: .85rem; color: var(--gray-600); line-height: 1.6; }

/* ============ CTA SECTION ============ */
.cta-section { background: linear-gradient(135deg, var(--navy-800), var(--navy-700)); padding: 80px 0; text-align: center; }
.cta-section h2 { color: var(--white); font-size: 2.4rem; margin-bottom: 16px; }
.cta-section p { color: var(--gray-400); font-size: 1.05rem; margin-bottom: 36px; }
.cta-section .btn-primary { font-size: 1.1rem; padding: 18px 48px; }

/* ============ FOOTER ============ */
.footer { background: var(--navy-900); color: var(--gray-400); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-brand .logo-text { color: var(--white); font-size: 1.3rem; margin-bottom: 16px; }
.footer-logo { height: 52px; width: auto; display: block; filter: brightness(0) invert(1); margin-bottom: 20px; }
.footer-brand p { font-size: .85rem; line-height: 1.7; margin-bottom: 20px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a { width: 36px; height: 36px; background: rgba(255,255,255,.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: var(--transition); }
.footer-social a:hover { background: var(--orange-500); }
.footer-social a svg { width: 16px; height: 16px; fill: var(--white); }
.footer-col h4 { color: var(--white); font-size: .9rem; margin-bottom: 20px; text-transform: uppercase; letter-spacing: 1px; }
.footer-col a { display: block; color: var(--gray-400); font-size: .85rem; padding: 6px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--orange-400); padding-left: 6px; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 14px; font-size: .85rem; align-items: flex-start; }
.footer-contact li svg { width: 16px; height: 16px; fill: var(--orange-500); flex-shrink: 0; margin-top: 3px; }
.footer-bottom { padding: 24px 0; text-align: center; font-size: .8rem; }

/* ============ FLOATING CONTACT BUTTONS ============ */
.contact-floats { position: fixed; right: 30px; bottom: 30px; z-index: 9999; display: flex; flex-direction: column; gap: 12px; }
.float-btn { width: 56px; height: 56px; border: none; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: 0 4px 18px rgba(5,21,49,.22); transition: transform .3s, box-shadow .3s; }
.float-btn:hover { transform: translateY(-4px) scale(1.06); box-shadow: 0 10px 28px rgba(5,21,49,.3); }
.float-btn svg { width: 28px; height: 28px; fill: var(--white); }
.float-btn--whatsapp { background: #25d366; animation: pulse 2s infinite; }
.float-btn--email { background: linear-gradient(135deg, var(--orange-600), var(--orange-400)); }
.float-btn--inquiry { background: linear-gradient(135deg, var(--navy-700), var(--navy-500)); }
@keyframes pulse { 0%,100% { box-shadow: 0 4px 20px rgba(37,211,102,.4); } 50% { box-shadow: 0 4px 30px rgba(37,211,102,.6); } }

/* ============ ONLINE INQUIRY MODAL ============ */
body.modal-open { overflow: hidden; }
.inquiry-modal { position: fixed; inset: 0; z-index: 10000; display: none; align-items: center; justify-content: center; padding: 20px; }
.inquiry-modal.open { display: flex; }
.inquiry-modal-mask { position: absolute; inset: 0; background: rgba(5,21,49,.62); }
.inquiry-modal-dialog { position: relative; width: 100%; max-width: 640px; max-height: 90vh; overflow-y: auto; background: var(--white); border-radius: 14px; padding: 34px 36px 32px; box-shadow: 0 24px 80px rgba(5,21,49,.4); animation: modalIn .3s ease; }
@keyframes modalIn { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.inquiry-modal-close { position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border: none; border-radius: 50%; background: var(--gray-100); color: var(--gray-600); font-size: 22px; line-height: 1; cursor: pointer; transition: var(--transition); }
.inquiry-modal-close:hover { background: var(--orange-500); color: var(--white); }
.inquiry-modal-dialog h3 { font-family: var(--font-heading); font-size: 1.4rem; color: var(--navy-800); margin-bottom: 8px; }
.inquiry-modal-sub { font-size: .85rem; color: var(--gray-500); margin-bottom: 22px; line-height: 1.6; }
.inquiry-modal-sub .req-mark { color: var(--orange-600); font-weight: 700; }
.inquiry-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }
.inquiry-field { display: flex; flex-direction: column; }
.inquiry-field--full { grid-column: 1 / -1; }
.inquiry-field label { font-size: .8rem; font-weight: 700; color: var(--navy-800); margin-bottom: 6px; }
.inquiry-field label.req::after { content: ' *'; color: var(--orange-600); }
.inquiry-field input, .inquiry-field textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--gray-300); border-radius: 8px; font-family: var(--font-body); font-size: .88rem; color: var(--gray-800); background: var(--white); transition: border-color .25s, box-shadow .25s; }
.inquiry-field textarea { resize: vertical; min-height: 96px; }
.inquiry-field input:focus, .inquiry-field textarea:focus { outline: none; border-color: var(--navy-500); box-shadow: 0 0 0 3px rgba(33,104,201,.15); }
.inquiry-field input::placeholder, .inquiry-field textarea::placeholder { color: var(--gray-400); }
.inquiry-field .field-error { display: none; font-size: .74rem; color: #d63031; margin-top: 5px; line-height: 1.4; }
.inquiry-field.invalid input, .inquiry-field.invalid textarea { border-color: #d63031; box-shadow: 0 0 0 3px rgba(214,48,49,.12); }
.inquiry-field.invalid .field-error { display: block; }
.inquiry-submit { width: 100%; margin-top: 20px; justify-content: center; }
.inquiry-success { display: none; text-align: center; padding: 28px 8px 12px; }
.inquiry-modal.sent .inquiry-form, .inquiry-modal.sent .inquiry-modal-sub { display: none; }
.inquiry-modal.sent .inquiry-success { display: block; }
.inquiry-success-icon { width: 64px; height: 64px; margin: 0 auto 18px; background: linear-gradient(135deg, #2ecc71, #27ae60); border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 8px 24px rgba(39,174,96,.35); }
.inquiry-success-icon svg { width: 30px; height: 30px; fill: var(--white); }
.inquiry-success h4 { font-family: var(--font-heading); font-size: 1.3rem; color: var(--navy-800); margin-bottom: 8px; }
.inquiry-success p { font-size: .9rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 22px; }

/* ============ PAGE BANNER (Inner pages) ============ */
.page-banner { position: relative; height: 260px; display: flex; align-items: center; background: var(--navy-800); overflow: hidden; }
.page-banner-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .3; }
.page-banner .container { position: relative; z-index: 2; width: 100%; text-align: left; }
.page-banner h1 { color: var(--white); font-size: 2.6rem; margin-bottom: 12px; }
.page-banner .breadcrumb { display: flex; gap: 8px; align-items: center; color: var(--gray-400); font-size: .88rem; }
.page-banner .breadcrumb a { color: var(--orange-400); }
.page-banner .breadcrumb a:hover { text-decoration: underline; }
.page-banner-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(5,21,49,.85) 0%, rgba(14,61,140,.6) 100%); }
.page-banner-content { position: relative; z-index: 2; }
.page-banner-content p { color: var(--gray-400); font-size: 1rem; margin-bottom: 16px; max-width: 640px; line-height: 1.7; }

/* ============ APPLICATION CARDS (Application page) ============ */
.application-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.application-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--gray-200); transition: var(--transition); display: flex; flex-direction: column; }
.application-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--orange-400); }
.application-card-img { aspect-ratio: 4 / 3; height: auto; overflow: hidden; }
.application-card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.application-card:hover .application-card-img img { transform: scale(1.05); }
.application-card-body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.application-card-body h3 { font-size: 1.2rem; color: var(--navy-800); margin-bottom: 12px; }
.application-card-body > p { font-size: .9rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 16px; }
.application-products { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.application-products li { background: var(--gray-100); color: var(--navy-700); padding: 6px 14px; font-size: .78rem; font-weight: 600; border-radius: 20px; border: 1px solid var(--gray-200); }
.application-card-body .btn { margin-top: auto; align-self: flex-start; }

/* ============ SOLUTIONS GRID (Application page) ============ */
.solutions-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.solution-card { background: var(--white); border-radius: var(--radius-lg); padding: 40px 32px; box-shadow: var(--shadow-sm); border: 1px solid var(--gray-200); transition: var(--transition); display: flex; flex-direction: column; }
.solution-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--orange-400); }
.solution-card-icon { width: 64px; height: 64px; background: linear-gradient(135deg, var(--navy-700), var(--navy-600)); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 24px; }
.solution-card-icon svg { width: 30px; height: 30px; fill: var(--white); }
.solution-card h3 { font-size: 1.15rem; color: var(--navy-800); margin-bottom: 12px; }
.solution-card > p { font-size: .9rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 20px; }
.solution-features { margin-bottom: 28px; flex: 1; }
.solution-features li { position: relative; padding-left: 24px; margin-bottom: 10px; color: var(--gray-700); font-size: .88rem; line-height: 1.5; }
.solution-features li::before { content: ''; position: absolute; left: 0; top: 7px; width: 8px; height: 8px; background: var(--orange-500); border-radius: 50%; }
.solution-card .btn { align-self: flex-start; }

/* ============ CONTENT SECTIONS (Inner) ============ */
.content-section { padding: 80px 0; }
.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.content-text h2 { font-size: 1.8rem; color: var(--navy-800); margin-bottom: 20px; }
.content-text h3 { font-size: 1.2rem; color: var(--navy-700); margin: 24px 0 12px; }
.content-text p { color: var(--gray-600); line-height: 1.8; margin-bottom: 16px; }
.content-text ul { margin: 16px 0; }
.content-text ul li { position: relative; padding-left: 24px; margin-bottom: 10px; color: var(--gray-700); font-size: .92rem; }
.content-text ul li::before { content: ''; position: absolute; left: 0; top: 8px; width: 8px; height: 8px; background: var(--orange-500); border-radius: 50%; }

/* Info cards grid */
.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.info-card { padding: 32px 24px; background: var(--gray-50); border-radius: var(--radius-md); border-left: 4px solid var(--orange-500); }
.info-card h4 { font-size: .95rem; color: var(--navy-800); margin-bottom: 10px; }
.info-card p { font-size: .85rem; color: var(--gray-600); line-height: 1.6; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border: 1px solid var(--gray-200); border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; cursor: pointer; font-weight: 600; color: var(--navy-800); transition: var(--transition); }
.faq-question:hover { background: var(--gray-50); color: var(--orange-500); }
.faq-question .toggle { font-size: 1.4rem; transition: var(--transition); }
.faq-item.active .faq-question .toggle { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq-answer-inner { padding: 0 24px 20px; color: var(--gray-600); font-size: .9rem; line-height: 1.7; }
.faq-item.active .faq-answer { max-height: 500px; }

/* Contact form */
.contact-form { background: var(--white); padding: 40px; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; color: var(--navy-800); margin-bottom: 6px; }
.form-group label .required { color: var(--orange-500); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 16px; border: 1px solid var(--gray-300); border-radius: var(--radius-sm); font-size: .9rem; font-family: var(--font-body); transition: var(--transition); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--orange-500); box-shadow: 0 0 0 3px rgba(244,140,6,.1); }
.form-group textarea { resize: vertical; min-height: 120px; }

/* ============ RESPONSIVE - Multi-Resolution ============ */

/* Large screens > 1900px: display 1600px container */
@media (min-width: 1901px) {
  .container { max-width: 1600px; }
  .slide-content { max-width: 1600px; }
  .hero-slider { max-height: 960px; }
  .slide-title { font-size: 3.6rem; }
}

/* 1600px - 1900px: display 1440px container */
@media (min-width: 1601px) and (max-width: 1900px) {
  .container { max-width: 1440px; }
}

/* 1400px - 1600px */
@media (min-width: 1401px) and (max-width: 1600px) {
  .container { max-width: 1320px; padding: 0 32px; }
  .slide-content { max-width: 1320px; padding: 0 32px; }
}

/* 1200px - 1400px */
@media (min-width: 1201px) and (max-width: 1400px) {
  .container { max-width: 1140px; padding: 0 24px; }
  .slide-content { max-width: 1140px; padding: 0 24px; }
  .logo-img { height: 52px; }
  .products-grid { grid-template-columns: repeat(4, 1fr); }
  .nav-link { padding: 24px 10px; font-size: .82rem; }
}

/* 992px - 1200px (small desktop / landscape tablet) */
@media (min-width: 993px) and (max-width: 1200px) {
  .container { max-width: 960px; padding: 0 20px; }
  .slide-content { max-width: 960px; padding: 0 20px; }
  .logo-img { height: 44px; }
  .products-grid { grid-template-columns: repeat(3, 1fr); }
  .quick-nav-grid { grid-template-columns: repeat(5, 1fr); }
  .scenario-grid { grid-template-columns: repeat(4, 1fr); }
  .advantages-grid { grid-template-columns: repeat(4, 1fr); }
  .nav-link { padding: 24px 8px; font-size: .8rem; }
  .factory-grid { gap: 40px; }
  .slide-title { font-size: 2.6rem; }
}

/* 768px - 992px (tablet) */
@media (min-width: 769px) and (max-width: 992px) {
  .container { max-width: 720px; padding: 0 20px; }
  .slide-content { max-width: 720px; padding: 0 20px; }
  .products-grid { grid-template-columns: repeat(3, 1fr); }
  .quick-nav-grid { grid-template-columns: repeat(3, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .application-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .slide-title { font-size: 2.2rem; }
  .hero-slider { max-height: 700px; }
}

/* <= 768px (mobile) */
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .top-bar { display: none; }
  .header .container { height: 64px; }
  .logo-img { height: 42px; }
  .menu-toggle { display: flex; }
  .nav-menu { position: fixed; top: 64px; left: 0; right: 0; bottom: 0; background: var(--white); flex-direction: column; align-items: stretch; padding: 20px; overflow-y: auto; transform: translateX(100%); visibility: hidden; transition: var(--transition); z-index: 999; }
  .nav-menu.open { transform: translateX(0); visibility: visible; }
  .nav-link { padding: 14px 0; border-bottom: 1px solid var(--gray-100); }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border-top: none; display: none; padding-left: 16px; }
  .nav-item.open .dropdown { display: block; }
  .hero-slider { height: 70vh; min-height: 480px; max-height: none; }
  .slide-title { font-size: 1.8rem; }
  .slide-desc { font-size: .95rem; }
  .slide-content { padding: 0 16px; }
  .products-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .quick-nav-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .factory-grid, .content-grid { grid-template-columns: 1fr; gap: 32px; }
  .cases-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .section-title { font-size: 1.5rem; }
  .section-header { margin-bottom: 36px; }
  .page-banner { height: 240px; }
  .page-banner h1 { font-size: 1.6rem; }
  .factory-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .stat-item .num { font-size: 1.4rem; }
  .cta-section h2 { font-size: 1.6rem; }
  .slider-arrows { display: none; }
}

/* <= 480px (small mobile) */
@media (max-width: 480px) {
  .container { padding: 0 12px; }
  .products-grid { grid-template-columns: 1fr; }
  .quick-nav-grid { grid-template-columns: repeat(2, 1fr); }
  .factory-stats { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .slide-title { font-size: 1.4rem; }
  .slide-btns { flex-direction: column; }
  .slide-btns .btn { width: 100%; justify-content: center; }
  .section { padding: 36px 0; }
  .section-title { font-size: 1.3rem; }
  .product-card-img { height: 180px; }
  .scenario-card { height: auto; }
  .page-banner { height: 200px; }
  .page-banner h1 { font-size: 1.3rem; }
  .contact-floats { right: 16px; bottom: 20px; gap: 10px; }
  .float-btn { width: 50px; height: 50px; }
  .float-btn svg { width: 24px; height: 24px; }
  .inquiry-modal { padding: 12px; }
  .inquiry-modal-dialog { padding: 26px 20px 24px; }
  .inquiry-form-grid { grid-template-columns: 1fr; }
}