:root {
  --primary: #225D50;
  --primary-dark: #164437;
  --text: #202624;
  --text-light: #5B6761;
  --bg: #FFFFFF;
  --bg-gray: #F4F6F5;
  --border: #DEE4E0;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { background: var(--bg); color: var(--text); font: 15px/1.7 "Microsoft YaHei", "PingFang SC", Arial, sans-serif; }
a { text-decoration: none; color: inherit; }
a, button { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--primary); outline-offset: 4px; }
button { font: inherit; cursor: pointer; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
.icon-sprite { display: none; }
.svg-icon { display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; width: 20px; height: 20px; }
.svg-icon svg { width: 100%; height: 100%; }
.container { width: min(1280px, calc(100% - 80px)); margin-inline: auto; }
.header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid var(--border); background: var(--bg); }
.header .container { display: flex; align-items: center; justify-content: space-between; min-height: 80px; gap: 25px; }
.logo { flex: none; }
.logo img { width: 224px; height: auto; }
.nav ul { display: flex; align-items: center; gap: 21px; }
.nav a { display: block; padding: 26px 0; font-size: 13px; white-space: nowrap; color: var(--text-light); }
.nav li.active a { color: var(--primary); font-weight: 700; }
.nav a:hover { color: var(--primary); }
.header-actions { display: flex; align-items: center; gap: 9px; flex: none; }
.header-actions .svg-icon { width: 14px; height: 14px; }
.btn-login, .btn-register { display: inline-flex; align-items: center; justify-content: center; gap: 4px; padding: 8px 13px; border: 1px solid var(--border); border-radius: 4px; font-size: 12px; white-space: nowrap; }
.btn-register { border-color: var(--primary); background: var(--primary); color: white; }
.btn-login:hover { border-color: var(--primary); color: var(--primary); }
.btn-register:hover { background: var(--primary-dark); }
.menu-toggle { display: none; width: 32px; height: 36px; border: 0; background: none; padding: 7px 4px; }
.menu-toggle span { display: block; height: 2px; background: var(--text); margin: 5px 0; }
.mobile-nav { display: none; }

.hero { background: var(--bg-gray); border-bottom: 1px solid var(--border); padding: 64px 0 55px; }
.hero .container { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 76px; align-items: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 7px; color: var(--primary); font-size: 12px; font-weight: 700; margin-bottom: 18px; letter-spacing: .05em; }
.hero-badge .svg-icon { width: 16px; height: 16px; }
.hero h1 { font-size: clamp(30px, 3.3vw, 46px); letter-spacing: -.035em; line-height: 1.35; margin-bottom: 19px; }
.hero-content > p { max-width: 600px; font-size: 14px; color: var(--text-light); line-height: 1.9; margin-bottom: 26px; }
.hero-buttons { display: flex; align-items: center; gap: 12px; }
.btn-primary, .btn-secondary { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 22px; border: 1px solid var(--primary); border-radius: 4px; font-size: 14px; font-weight: 700; }
.btn-primary { color: white; background: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: transparent; color: var(--primary); }
.btn-secondary:hover { background: #E7EEE9; }
.hero-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 35px; padding-top: 20px; border-top: 1px solid #D5DED8; gap: 14px; }
.stat-value { font-size: 14px; font-weight: 700; }
.stat-label { margin-top: 3px; font-size: 11px; color: var(--text-light); }
.hero-visual { min-width: 0; }
.hero-card { background: white; border: 1px solid var(--border); border-top: 3px solid var(--primary); border-radius: 6px; padding: 27px 24px 22px; box-shadow: 0 9px 25px rgba(24, 49, 38, .04); }
.hero-card h3 { font-size: 19px; line-height: 1.4; margin-bottom: 8px; }
.hero-card > p { font-size: 12px; color: var(--text-light); margin-bottom: 23px; }
.quick-login { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.quick-login-btn { display: flex; align-items: center; justify-content: center; gap: 5px; border: 1px solid var(--primary); padding: 11px 7px; border-radius: 4px; font-size: 13px; font-weight: 700; }
.quick-login-btn.primary { color: white; background: var(--primary); }
.quick-login-btn.outline { color: var(--primary); }
.quick-login-btn .svg-icon { width: 16px; height: 16px; }
.quick-links { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 5px; border-top: 1px solid var(--border); padding-top: 21px; margin-top: 22px; }
.quick-link { display: flex; flex-direction: column; align-items: center; gap: 8px; font-size: 11px; color: var(--text-light); }
.quick-link .svg-icon { color: var(--primary); width: 18px; height: 18px; }
.quick-link:hover { color: var(--primary); }

section:not(.hero) { padding: 65px 0; }
.section-header { margin-bottom: 28px; padding-left: 16px; border-left: 3px solid var(--primary); }
.section-header h2 { font-size: 28px; font-weight: 700; line-height: 1.4; letter-spacing: -.025em; margin-bottom: 6px; }
.section-header p { font-size: 13px; color: var(--text-light); }
.products { background: white; }
.product-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 16px; }
.product-card { display: block; position: relative; min-width: 0; border: 1px solid var(--border); border-radius: 5px; overflow: hidden; background: white; transition: border-color .18s ease; }
.product-card:hover { border-color: var(--primary); }
.product-tag { position: absolute; top: 10px; left: 10px; z-index: 1; padding: 2px 6px; font-size: 10px; color: var(--primary); background: #EDF3EF; border: 1px solid #D4E2D9; border-radius: 2px; }
.product-img { aspect-ratio: 1 / 1; padding: 14px 11px; background: #FAFBFA; border-bottom: 1px solid #EDF0EE; }
.product-img img { width: 100%; height: 100%; object-fit: contain; }
.product-info { padding: 13px 13px 14px; }
.product-name { min-height: 42px; margin-bottom: 10px; font-size: 13px; font-weight: 600; line-height: 1.6; overflow-wrap: anywhere; }
.product-meta { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; }
.product-price { color: var(--primary); font-size: 21px; font-weight: 750; line-height: 1.2; font-variant-numeric: tabular-nums; }
.product-shipping { color: var(--text-light); font-size: 10px; }

.features { background: var(--bg-gray); }
.feature-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border: 1px solid var(--border); background: white; border-radius: 5px; }
.feature-card { padding: 27px 23px; min-width: 0; border-right: 1px solid var(--border); }
.feature-card:last-child { border-right: none; }
.feature-icon { color: var(--primary); margin-bottom: 18px; }
.feature-icon .svg-icon { width: 26px; height: 26px; }
.feature-card h3, .platform-card h3, .adv-card h3 { margin-bottom: 8px; font-size: 16px; line-height: 1.5; }
.feature-card p, .platform-card p, .adv-card p { font-size: 13px; line-height: 1.8; color: var(--text-light); }
.platform-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; }
.platform-card { display: grid; grid-template-columns: 37px minmax(0, 1fr); column-gap: 17px; padding: 23px 25px; border: 1px solid var(--border); border-radius: 5px; }
.platform-icon { grid-row: span 2; width: 37px; height: 37px; display: grid; place-items: center; background: var(--bg-gray); color: var(--primary); border-radius: 4px; }
.platform-icon .svg-icon { width: 23px; height: 23px; }
.platform-card h3 { margin-bottom: 6px; }
.advantages { background: var(--bg-gray); }
.adv-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.adv-card { background: white; border: 1px solid var(--border); border-radius: 5px; padding: 25px 23px; }
.adv-icon { margin-bottom: 17px; color: var(--primary); }
.adv-icon .svg-icon { width: 24px; height: 24px; }
.faq-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.faq-card { position: relative; padding: 24px; border: 1px solid var(--border); border-radius: 5px; display: flex; flex-direction: column; align-items: flex-start; }
.faq-tag { display: inline-block; font-size: 11px; color: var(--primary); background: #EDF3EF; padding: 3px 7px; border-radius: 2px; margin-bottom: 14px; }
.faq-card h3 { font-size: 16px; line-height: 1.6; margin-bottom: 9px; }
.faq-card p { color: var(--text-light); font-size: 13px; line-height: 1.85; margin-bottom: 20px; }
.faq-date { margin-top: auto; color: var(--text-light); font-size: 10px; }
.cta-section { background: #202B26; color: white; }
.cta-content { display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 55px; }
.cta-content h2 { font-size: 29px; line-height: 1.4; margin-bottom: 10px; }
.cta-content > p { grid-column: 1; color: #D0DAD4; font-size: 13px; }
.cta-buttons { grid-column: 2; grid-row: 1 / 3; display: flex; gap: 10px; align-items: center; }
.cta-buttons .btn-primary { background: #EDF3EF; color: #203A2C; border-color: #EDF3EF; }
.cta-buttons .btn-secondary { color: white; border-color: #8C9D93; }
.cta-buttons .btn-secondary:hover { background: #33483A; }
.cta-content > div:last-child { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; padding-top: 24px; border-top: 1px solid #43574A; }
.cta-content > div:last-child > span { font-size: 11px; border: 1px solid #52665A; padding: 4px 11px; border-radius: 3px; color: #D0DAD4; }
.partners .section-header { border: none; padding-left: 0; }
.partners .section-header h2 { font-size: 19px; color: var(--text-light); }
.partners-grid { display: grid; grid-template-columns: repeat(9, minmax(0, 1fr)); align-items: center; gap: 20px; }
.partners-grid img { width: 100%; max-width: 93px; height: 45px; object-fit: contain; margin: auto; filter: grayscale(1); opacity: .7; }
.footer { background: var(--bg-gray); border-top: 1px solid var(--border); padding: 28px 0; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; color: var(--text-light); font-size: 11px; }
.footer-bottom a { color: var(--primary); }
.back-to-top { position: fixed; right: 18px; bottom: 20px; display: grid; place-items: center; background: var(--text); color: white; width: 37px; height: 37px; border: none; border-radius: 4px; opacity: 0; visibility: hidden; }
.back-to-top.visible { opacity: 1; visibility: visible; }

@media (max-width: 1200px) {
  .container { width: calc(100% - 48px); }
  .nav ul { gap: 15px; }
  .logo img { width: 204px; }
  .header .container { gap: 16px; }
  .product-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 1024px) {
  .nav, .header-actions { display: none; }
  .menu-toggle { display: block; }
  .mobile-nav { position: fixed; inset: 81px 0 0; z-index: 49; background: rgba(20, 32, 25, .32); }
  .mobile-nav.active { display: block; }
  .mobile-nav-inner { background: white; padding: 15px 24px 24px; border-bottom: 1px solid var(--border); max-height: calc(100dvh - 81px); overflow-y: auto; }
  .mobile-nav-inner > a { display: block; padding: 11px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
  .mobile-nav-actions { display: flex; gap: 12px; margin-top: 20px; }
  .mobile-nav-actions a { flex: 1; }
  .hero .container { grid-template-columns: minmax(0, 1fr) 300px; gap: 30px; }
  .hero-card { padding: 24px 20px; }
  .feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .feature-card { border-bottom: 1px solid var(--border); }
  .feature-card:nth-child(3) { border-right: none; }
  .feature-card:nth-child(n + 4) { border-bottom: none; }
  .adv-grid, .faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .platform-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta-content { display: block; }
  .cta-buttons { margin-top: 22px; }
}
@media (max-width: 640px) {
  .container { width: calc(100% - 32px); }
  .header .container { min-height: 70px; }
  .logo img { width: 225px; }
  .mobile-nav { top: 71px; }
  .mobile-nav-inner { max-height: calc(100dvh - 71px); }
  .hero { padding: 35px 0 32px; }
  .hero .container { display: block; }
  .hero-badge { font-size: 11px; margin-bottom: 13px; }
  .hero h1 { font-size: 28px; line-height: 1.5; margin-bottom: 14px; }
  .hero-content > p { font-size: 13px; margin-bottom: 21px; }
  .hero-buttons { gap: 9px; }
  .btn-primary, .btn-secondary { font-size: 12px; padding: 10px 13px; }
  .hero-buttons .svg-icon { width: 16px; height: 16px; }
  .hero-stats { margin-top: 24px; padding-top: 16px; gap: 8px; }
  .stat-value { font-size: 12px; }
  .stat-label { font-size: 10px; }
  .hero-visual { margin-top: 25px; }
  .hero-card { padding: 21px 20px 18px; }
  .hero-card h3 { font-size: 17px; }
  .hero-card > p { margin-bottom: 17px; }
  .quick-links { margin-top: 17px; padding-top: 17px; }
  section:not(.hero) { padding: 42px 0; }
  .section-header { margin-bottom: 22px; padding-left: 12px; }
  .section-header h2 { font-size: 23px; }
  .section-header p { font-size: 12px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .product-img { padding: 10px; }
  .product-info { padding: 12px 11px; }
  .product-name { font-size: 13px; min-height: 42px; }
  .product-price { font-size: 20px; }
  .product-shipping { font-size: 10px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-card { padding: 21px 17px; }
  .feature-card:nth-child(3) { border-right: 1px solid var(--border); }
  .feature-card:nth-child(2n) { border-right: none; }
  .feature-card:nth-child(4) { border-bottom: 1px solid var(--border); }
  .feature-card:last-child { grid-column: 1 / -1; }
  .platform-grid, .adv-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .platform-card { display: block; padding: 20px 16px; }
  .platform-icon { margin-bottom: 14px; }
  .adv-card { padding: 20px 16px; }
  .feature-card h3, .platform-card h3, .adv-card h3 { font-size: 15px; }
  .feature-card p, .platform-card p, .adv-card p { font-size: 12px; }
  .faq-grid { grid-template-columns: 1fr; gap: 12px; }
  .faq-card { padding: 21px; }
  .faq-card p { margin-bottom: 14px; }
  .cta-content h2 { font-size: 24px; }
  .cta-buttons { flex-wrap: wrap; }
  .partners-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px 15px; }
  .partners-grid img { height: 36px; }
  .footer-bottom { display: block; }
  .footer-bottom p + p { margin-top: 7px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}