/* ========== Design System ========== */
:root {
  --primary: #52c41a;
  --primary-light: #73d13d;
  --primary-dark: #389e0d;
  --primary-bg: rgba(82, 196, 26, 0.08);
  --primary-glow: rgba(82, 196, 26, 0.15);
  --accent: #1677ff;
  --accent-light: #4096ff;
  --accent-bg: rgba(22, 119, 255, 0.08);
  --text: #1a1a1a;
  --text-secondary: #555;
  --text-muted: #999;
  --bg: #ffffff;
  --bg-gray: #f5f7fa;
  --bg-dark: #0a1628;
  --border: #e8e8e8;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --max-width: 1200px;
  --nav-height: 76px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); }
body { font-family: var(--font); color: var(--text); line-height: 1.7; background: var(--bg); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 90px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header .tag { display: inline-block; padding: 6px 18px; background: var(--primary-bg); color: var(--primary); border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 16px; letter-spacing: 2px; text-transform: uppercase; }
.section-header h2 { font-size: 36px; font-weight: 700; color: var(--text); margin-bottom: 12px; line-height: 1.3; }
.section-header p { font-size: 17px; color: var(--text-secondary); max-width: 640px; margin: 0 auto; }

/* ========== Navigation ========== */
.nav { position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height); background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid transparent; z-index: 1000; transition: var(--transition); }
.nav.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); }
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo img { height: 64px; width: auto; display: block; }
.nav-logo .logo-text { font-size: 15px; font-weight: 700; color: var(--primary-dark); white-space: nowrap; }
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { font-size: 15px; color: var(--text); font-weight: 500; position: relative; padding: 4px 0; transition: var(--transition); }
.nav-links a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--primary); border-radius: 2px; transition: var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-phone { font-size: 14px; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.nav-phone svg { width: 16px; height: 16px; }
.btn-nav { padding: 10px 22px; background: var(--primary); color: #fff; border-radius: 8px; font-size: 14px; font-weight: 600; transition: var(--transition); }
.btn-nav:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(82,196,26,0.35); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); transition: var(--transition); border-radius: 2px; }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ========== Hero ========== */
.hero { padding-top: calc(var(--nav-height) + 60px); padding-bottom: 100px; background: linear-gradient(160deg, #f0f9eb 0%, #e6f7ff 40%, #ffffff 100%); position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -200px; right: -100px; width: 600px; height: 600px; background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%); border-radius: 50%; pointer-events: none; }
.hero::after { content: ''; position: absolute; bottom: -150px; left: -100px; width: 500px; height: 500px; background: radial-gradient(circle, rgba(22,119,255,0.08) 0%, transparent 70%); border-radius: 50%; pointer-events: none; }
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
.hero-content h1 { font-size: 46px; font-weight: 800; line-height: 1.25; color: var(--text); margin-bottom: 20px; }
.hero-content h1 span { color: var(--primary); position: relative; display: inline-block; }
.hero-content h1 span::after { content: ''; position: absolute; bottom: 4px; left: 0; right: 0; height: 8px; background: var(--primary-glow); border-radius: 4px; z-index: -1; }
.hero-content .hero-desc { font-size: 17px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 36px; max-width: 520px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: 10px; font-size: 16px; font-weight: 600; transition: var(--transition); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; box-shadow: 0 4px 16px rgba(82,196,26,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(82,196,26,0.4); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.hero-visual { position: relative; }
.hero-card { background: #fff; border-radius: var(--radius-xl); padding: 32px; box-shadow: var(--shadow-xl); position: relative; z-index: 2; }
.hero-card .stat-row { display: flex; gap: 24px; margin-bottom: 24px; }
.hero-card .stat-item { flex: 1; text-align: center; }
.hero-card .stat-item .num { font-size: 32px; font-weight: 800; color: var(--primary); }
.hero-card .stat-item .label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }
.hero-card .service-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-card .service-tag { padding: 6px 14px; background: var(--bg-gray); border-radius: 6px; font-size: 13px; color: var(--text-secondary); }
.hero-float { position: absolute; width: 280px; background: #fff; border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-lg); z-index: 1; }
.hero-float.top-right { top: -20px; right: -60px; }
.hero-float.bottom-left { bottom: -30px; left: -40px; }
.hero-float h4 { font-size: 14px; color: var(--accent); margin-bottom: 6px; }
.hero-float p { font-size: 13px; color: var(--text-muted); }

/* ========== Stats Bar ========== */
.stats-bar { background: var(--primary); padding: 40px 0; }
.stats-bar .container { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 40px; }
.stat-block { text-align: center; color: #fff; }
.stat-block .stat-number { font-size: 42px; font-weight: 800; display: flex; align-items: baseline; justify-content: center; gap: 4px; }
.stat-block .stat-number .suffix { font-size: 22px; font-weight: 600; }
.stat-block .stat-label { font-size: 14px; opacity: 0.9; margin-top: 4px; }

/* ========== Services Section ========== */
.services { background: var(--bg); }
.services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; margin-top: 20px; }
.service-category { background: #fff; border-radius: var(--radius-xl); padding: 40px; box-shadow: var(--shadow); border: 1px solid var(--border); transition: var(--transition); }
.service-category:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.service-category .cat-header { display: flex; align-items: center; gap: 16px; margin-bottom: 28px; padding-bottom: 20px; border-bottom: 2px solid var(--bg-gray); }
.service-category .cat-icon { width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 26px; }
.cat-icon.security { background: linear-gradient(135deg, #e6f4ff, #bae0ff); color: #1677ff; }
.cat-icon.marketing { background: linear-gradient(135deg, var(--primary-bg), #d9f7be); color: var(--primary-dark); }
.service-category .cat-title { font-size: 22px; font-weight: 700; }
.service-category .cat-subtitle { font-size: 14px; color: var(--text-muted); }
.service-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.service-item { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 8px; transition: var(--transition); cursor: default; }
.service-item:hover { background: var(--bg-gray); }
.service-item .si-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.service-item.security .si-dot { background: var(--accent); }
.service-item.marketing .si-dot { background: var(--primary); }
.service-item span { font-size: 14px; color: var(--text-secondary); }

/* ========== Advantages ========== */
.advantages { background: var(--bg-gray); }
.advantages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.adv-card { background: #fff; border-radius: var(--radius-lg); padding: 32px 28px; text-align: center; transition: var(--transition); border: 1px solid transparent; }
.adv-card:hover { border-color: var(--primary); transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.adv-card .adv-icon { width: 64px; height: 64px; margin: 0 auto 20px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 28px; }
.adv-icon.blue { background: var(--accent-bg); color: var(--accent); }
.adv-icon.green { background: var(--primary-bg); color: var(--primary); }
.adv-icon.orange { background: #fff7e6; color: #fa8c16; }
.adv-icon.purple { background: #f9f0ff; color: #722ed1; }
.adv-icon.cyan { background: #e6fffb; color: #13c2c2; }
.adv-icon.red { background: #fff2f0; color: #cf1322; }
.adv-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.adv-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* ========== Solutions ========== */
.solutions { background: #fff; }
.solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sol-card { background: var(--bg-gray); border-radius: var(--radius-lg); padding: 30px 24px; text-align: center; transition: var(--transition); cursor: pointer; border: 2px solid transparent; }
.sol-card:hover { border-color: var(--primary); background: #fff; box-shadow: var(--shadow); transform: translateY(-4px); }
.sol-card .sol-icon { font-size: 40px; margin-bottom: 16px; }
.sol-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.sol-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ========== Process ========== */
.process { background: var(--bg); }
.process-steps { display: flex; justify-content: center; gap: 0; position: relative; }
.process-steps::before { content: ''; position: absolute; top: 36px; left: 10%; right: 10%; height: 2px; background: var(--border); z-index: 0; }
.process-step { flex: 1; text-align: center; position: relative; z-index: 1; max-width: 200px; }
.process-step .step-num { width: 72px; height: 72px; border-radius: 50%; background: #fff; border: 3px solid var(--primary); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 24px; font-weight: 800; color: var(--primary); position: relative; transition: var(--transition); }
.process-step:hover .step-num { background: var(--primary); color: #fff; transform: scale(1.1); }
.process-step h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.process-step p { font-size: 13px; color: var(--text-muted); }

/* ========== CTA ========== */
.cta { background: linear-gradient(135deg, var(--primary-dark), #237804); padding: 80px 0; text-align: center; color: #fff; }
.cta h2 { font-size: 34px; font-weight: 800; margin-bottom: 16px; }
.cta p { font-size: 17px; opacity: 0.9; max-width: 600px; margin: 0 auto 36px; }
.cta .btn-cta { display: inline-block; padding: 16px 42px; background: #fff; color: var(--primary-dark); border-radius: 12px; font-size: 17px; font-weight: 700; transition: var(--transition); }
.cta .btn-cta:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,0,0,0.25); }

/* ========== Products Page ========== */
.page-banner { padding-top: calc(var(--nav-height) + 40px); padding-bottom: 60px; background: linear-gradient(160deg, #f0f9eb, #fff); text-align: center; }
.page-banner h1 { font-size: 38px; font-weight: 800; margin-bottom: 12px; }
.page-banner p { font-size: 16px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }
.product-filter { display: flex; justify-content: center; gap: 12px; margin: 40px 0 30px; flex-wrap: wrap; }
.filter-tag { padding: 8px 20px; border-radius: 20px; font-size: 14px; font-weight: 600; cursor: pointer; background: var(--bg-gray); color: var(--text-secondary); transition: var(--transition); border: 2px solid transparent; }
.filter-tag:hover, .filter-tag.active { background: var(--primary-bg); color: var(--primary); border-color: var(--primary); }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); cursor: pointer; }
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.product-card .pc-image { height: 200px; background: linear-gradient(135deg, var(--bg-gray), #e8f5e9); display: flex; align-items: center; justify-content: center; font-size: 48px; }
.product-card .pc-body { padding: 24px; }
.product-card .pc-tag { display: inline-block; padding: 4px 12px; border-radius: 4px; font-size: 12px; font-weight: 600; margin-bottom: 10px; }
.pc-tag.security-tag { background: var(--accent-bg); color: var(--accent); }
.pc-tag.marketing-tag { background: var(--primary-bg); color: var(--primary-dark); }
.product-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.product-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.product-card .pc-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--bg-gray); }
.product-card .pc-more { color: var(--primary); font-weight: 600; font-size: 14px; }
.product-detail-modal { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 2000; align-items: center; justify-content: center; padding: 20px; }
.product-detail-modal.active { display: flex; }
.modal-content { background: #fff; border-radius: var(--radius-xl); max-width: 700px; width: 100%; max-height: 85vh; overflow-y: auto; padding: 40px; position: relative; }
.modal-close { position: absolute; top: 16px; right: 16px; width: 36px; height: 36px; border-radius: 50%; background: var(--bg-gray); display: flex; align-items: center; justify-content: center; font-size: 20px; cursor: pointer; transition: var(--transition); }
.modal-close:hover { background: #ff4d4f; color: #fff; }
.modal-content h2 { font-size: 28px; margin-bottom: 8px; }
.modal-content .modal-badge { display: inline-block; padding: 4px 12px; border-radius: 4px; font-size: 12px; font-weight: 600; margin-bottom: 20px; }
.modal-content .modal-desc { color: var(--text-secondary); line-height: 1.8; margin-bottom: 24px; }
.feature-list { display: grid; gap: 14px; margin-bottom: 24px; }
.feature-item { display: flex; align-items: flex-start; gap: 12px; padding: 14px; background: var(--bg-gray); border-radius: 8px; }
.feature-item .fi-icon { color: var(--primary); font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.feature-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.feature-item p { font-size: 13px; color: var(--text-muted); }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 16px; }
.spec-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 14px; }
.spec-table td:first-child { font-weight: 600; color: var(--text-secondary); width: 35%; background: var(--bg-gray); }

/* ========== About Page ========== */
.about-intro { padding: 90px 0 60px; }
.about-intro .container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-intro .about-text h2 { font-size: 32px; font-weight: 800; margin-bottom: 20px; }
.about-intro .about-text p { color: var(--text-secondary); line-height: 1.9; margin-bottom: 16px; font-size: 15px; }
.about-image { height: 400px; background: linear-gradient(135deg, var(--primary-bg), var(--accent-bg)); border-radius: var(--radius-xl); display: flex; align-items: center; justify-content: center; font-size: 80px; }
.values { background: var(--bg-gray); }
.values-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.value-card { background: #fff; border-radius: var(--radius-lg); padding: 28px 20px; text-align: center; transition: var(--transition); }
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.value-card .v-num { font-size: 36px; font-weight: 800; color: var(--primary); margin-bottom: 10px; }
.value-card h4 { font-size: 16px; font-weight: 700; }

/* ========== Contact Page ========== */
.contact-section { padding: 90px 0; }
.contact-section .container { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; }
.contact-info h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; }
.contact-info .ci-desc { color: var(--text-secondary); margin-bottom: 32px; }
.contact-info-item { display: flex; gap: 16px; margin-bottom: 24px; align-items: flex-start; }
.contact-info-item .ci-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; background: var(--primary-bg); color: var(--primary); }
.contact-info-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.contact-info-item span { font-size: 14px; color: var(--text-muted); display: block; }
.contact-form-wrapper { background: #fff; border-radius: var(--radius-xl); padding: 36px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
.contact-form-wrapper h3 { font-size: 22px; font-weight: 700; margin-bottom: 24px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; color: var(--text-secondary); }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; border: 2px solid var(--border); border-radius: 8px; font-size: 15px; transition: var(--transition); outline: none; background: var(--bg-gray); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--primary); background: #fff; }
.form-group textarea { min-height: 120px; resize: vertical; }
.btn-submit { width: 100%; padding: 14px; background: var(--primary); color: #fff; border-radius: 10px; font-size: 16px; font-weight: 700; transition: var(--transition); }
.btn-submit:hover { background: var(--primary-dark); }

/* ========== Footer ========== */
.footer { background: #0a1628; color: #ccc; padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand h3 { font-size: 22px; color: #fff; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; line-height: 1.8; color: #aaa; }
.footer-col h4 { font-size: 15px; color: #fff; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 13px; color: #aaa; margin-bottom: 10px; transition: var(--transition); }
.footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom { border-top: 1px solid #1e2a3a; padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; font-size: 13px; color: #666; }
.footer-bottom a { color: var(--primary-light); }

/* ========== Mobile Menu ========== */
.mobile-menu { display: none; position: fixed; top: var(--nav-height); left: 0; right: 0; bottom: 0; background: #fff; z-index: 999; padding: 24px; overflow-y: auto; }
.mobile-menu.active { display: block; }
.mobile-menu a { display: block; padding: 14px 0; font-size: 17px; font-weight: 600; border-bottom: 1px solid var(--border); color: var(--text); }
.mobile-menu a:hover { color: var(--primary); }
.mobile-menu .mm-phone { margin-top: 20px; padding: 16px; background: var(--bg-gray); border-radius: 8px; text-align: center; }

/* ========== Back to Top ========== */
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 20px; z-index: 999; opacity: 0; visibility: hidden; transition: var(--transition); cursor: pointer; box-shadow: 0 4px 12px rgba(82,196,26,0.4); }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* ========== Toast / Form Messages ========== */
.toast { position: fixed; top: 100px; left: 50%; transform: translateX(-50%); padding: 14px 28px; border-radius: 10px; font-weight: 600; z-index: 3000; font-size: 15px; animation: slideDown 0.4s ease; }
.toast.success { background: #f6ffed; color: #389e0d; border: 1px solid #b7eb8f; }
.toast.error { background: #fff2f0; color: #cf1322; border: 1px solid #ffa39e; }
@keyframes slideDown { from { top: 60px; opacity: 0; } to { top: 100px; opacity: 1; } }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: repeat(3, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .process-steps { flex-wrap: wrap; gap: 20px; }
  .process-steps::before { display: none; }
  .about-intro .container { grid-template-columns: 1fr; }
  .contact-section .container { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions { display: none; }
  .nav-toggle { display: flex; }
  .section { padding: 60px 0; }
  .hero { padding-top: calc(var(--nav-height) + 30px); padding-bottom: 60px; }
  .hero-content h1 { font-size: 32px; }
  .section-header h2 { font-size: 28px; }
  .service-list { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .process-steps { flex-direction: column; align-items: center; }
  .stats-bar .container { gap: 24px; }
  .stat-block .stat-number { font-size: 32px; }
  .detail-layout { grid-template-columns: 1fr; }
  .nav-logo .logo-text { font-size: 16px; }
}

/* ========== Breadcrumb ========== */
.breadcrumb { font-size: 14px; color: var(--text-muted); margin-bottom: 12px; }
.breadcrumb a { color: var(--accent); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--text-secondary); }

/* ========== Product Detail ========== */
.detail-layout { max-width: 900px; margin: 0 auto; }
.feature-list { display: flex; flex-direction: column; gap: 16px; }
.feature-item { display: flex; gap: 16px; padding: 20px; background: #fafafa; border-radius: var(--radius-lg); align-items: flex-start; transition: var(--transition); }
.feature-item:hover { background: var(--primary-bg); box-shadow: var(--shadow-sm); }
.feature-item .fi-icon { width: 36px; height: 36px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0; }
.feature-item h4 { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.feature-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); }
.spec-table tr { border-bottom: 1px solid var(--border); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table td { padding: 14px 20px; font-size: 14px; }
.spec-table td:first-child { width: 180px; font-weight: 600; color: var(--text); background: var(--bg-gray); }
.spec-table td:last-child { color: var(--text-secondary); }