:root {
  --primary: #0a1628;
  --primary-light: #132240;
  --primary-lighter: #1a3052;
  --primary-dark: #060f1c;
  --accent: #f0883e;
  --accent-hover: #e0752a;
  --accent-light: rgba(240, 136, 62, .12);
  --white: #fff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --shadow-md: 0 4px 16px rgba(0, 0, 0, .1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, .12);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, .15);
  --font-display: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--text-primary); background: var(--white); line-height: 1.7; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
.qs-loading { min-height: 100vh; display: grid; place-items: center; color: var(--text-secondary); }

.qs-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(10, 22, 40, .95); color: var(--white); backdrop-filter: blur(18px); box-shadow: 0 2px 20px rgba(0, 0, 0, .15); }
.qs-nav.scrolled { background: rgba(10, 22, 40, .98); box-shadow: 0 4px 24px rgba(0, 0, 0, .25); }
.qs-nav-top { background: rgba(0, 0, 0, .3); border-bottom: 1px solid rgba(255, 255, 255, .06); font-size: .78rem; }
.qs-nav-top-inner { max-width: 1280px; margin: 0 auto; padding: 6px var(--space-xl); display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg); color: rgba(255, 255, 255, .56); }
.qs-nav-top-links { display: flex; align-items: center; gap: var(--space-lg); }
.qs-nav-top-links a { color: rgba(255, 255, 255, .58); }
.qs-nav-top-links a:hover, .qs-nav-top-links span { color: var(--accent); }
.qs-nav-main { height: 64px; }
.qs-nav-inner { max-width: 1280px; height: 100%; margin: 0 auto; padding: 0 var(--space-xl); display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg); }
.qs-logo { display: inline-flex; align-items: center; gap: .625rem; font-weight: 800; z-index: 1001; }
.qs-logo-mark { width: 42px; height: 42px; border-radius: var(--radius-sm); display: grid; place-items: center; background: linear-gradient(135deg, var(--accent), #ff6b35); color: var(--white); font-weight: 900; font-size: 1.25rem; }
.qs-logo-text { font-family: var(--font-display); font-size: 1.2rem; letter-spacing: .5px; }
.qs-nav-menu { height: 100%; display: flex; align-items: center; list-style: none; }
.qs-nav-item { position: relative; height: 100%; display: flex; align-items: center; }
.qs-nav-link { height: 100%; padding: 0 .9rem; display: flex; align-items: center; gap: .25rem; color: rgba(255, 255, 255, .78); border-bottom: 3px solid transparent; font-size: .9rem; white-space: nowrap; }
.qs-nav-link:hover, .qs-nav-link.active { color: var(--white); border-bottom-color: var(--accent); }
.qs-nav-link i { font-size: .65rem; transition: transform .18s ease; }
.qs-nav-item:hover .qs-nav-link i { transform: rotate(180deg); }
.qs-nav-dropdown, .qs-nav-mega { position: absolute; top: 100%; left: 50%; z-index: 1002; background: var(--white); color: var(--text-primary); border-radius: var(--radius-md); box-shadow: var(--shadow-xl); opacity: 0; visibility: hidden; pointer-events: none; transform: translateX(-50%) translateY(8px); transition: .22s ease; }
.qs-nav-item:hover .qs-nav-dropdown, .qs-nav-item:hover .qs-nav-mega { opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0); }
.qs-nav-dropdown.simple { min-width: 230px; padding: .5rem 0; }
.qs-dropdown-link { display: flex; align-items: center; gap: .65rem; padding: .65rem 1.2rem; color: var(--text-primary); font-size: .875rem; white-space: nowrap; }
.qs-dropdown-link:hover { background: var(--gray-50); color: var(--accent); }
.qs-dropdown-link i { width: 18px; color: var(--accent); opacity: .8; text-align: center; }
.qs-nav-mega { width: 880px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-md); padding: var(--space-lg); }
.qs-nav-mega.cols-2 { width: 520px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.qs-mega-col h4 { min-height: 1.2rem; padding: 0 .55rem; margin-bottom: .45rem; color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .5px; }
.qs-mega-col a { display: block; padding: .55rem .6rem; border-radius: var(--radius-sm); color: var(--text-primary); font-size: .85rem; line-height: 1.35; }
.qs-mega-col a:hover { background: var(--gray-50); color: var(--accent); }
.qs-mega-col a i { width: 18px; margin-right: .25rem; color: var(--accent); opacity: .72; text-align: center; }
.qs-mega-col .link-row { display: inline-flex; align-items: center; max-width: calc(100% - 24px); vertical-align: middle; }
.qs-mega-col .link-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qs-mega-col .sub-desc { display: block; margin-top: 2px; color: var(--text-light); font-size: .72rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qs-nav-toggle { display: none; flex-direction: column; gap: 5px; border: 0; background: transparent; cursor: pointer; padding: 4px; z-index: 1001; }
.qs-nav-toggle span { width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: .22s ease; }
.qs-nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.qs-nav-toggle.active span:nth-child(2) { opacity: 0; }
.qs-nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.qs-hero, .qs-banner { position: relative; overflow: hidden; color: var(--white); text-align: center; background: linear-gradient(135deg, var(--primary-dark), var(--primary-light) 44%, var(--primary)); }
.qs-hero::before, .qs-banner::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px); background-size: 60px 60px; opacity: .8; }
.qs-hero::after, .qs-banner::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 70% 30%, rgba(240,136,62,.15), transparent 34%), radial-gradient(circle at 25% 65%, rgba(59,130,246,.08), transparent 32%); }
.qs-hero { min-height: 100vh; padding: 9rem var(--space-xl) 5rem; display: grid; place-items: center; }
.qs-banner { padding: 140px var(--space-xl) var(--space-3xl); }
.qs-hero-inner, .qs-container { position: relative; z-index: 1; max-width: 1280px; margin: 0 auto; }
.qs-badge { display: inline-flex; align-items: center; gap: .5rem; border: 1px solid rgba(240,136,62,.3); background: rgba(240,136,62,.15); color: #ffbf92; border-radius: var(--radius-full); padding: .45rem 1.1rem; font-size: .88rem; margin-bottom: 1.4rem; }
.qs-dot { width: 8px; height: 8px; border-radius: 999px; background: var(--accent); }
.qs-hero h1, .qs-banner h1 { max-width: 920px; margin: 0 auto var(--space-md); font-family: var(--font-display); font-size: clamp(2.4rem, 6vw, 4.5rem); line-height: 1.15; font-weight: 900; }
.qs-banner h1 { font-size: clamp(2rem, 4vw, 3.1rem); }
.qs-hero p, .qs-banner p { max-width: 720px; margin: 0 auto; color: rgba(255,255,255,.72); font-size: 1.08rem; }
.qs-banner-decor { position: absolute; z-index: 0; pointer-events: none; opacity: .12; }
.qs-banner-decor.decor-1 { top: -45px; right: 8%; width: 260px; height: 260px; border: 2px dashed rgba(240,136,62,.7); border-radius: 14px; transform: rotate(28deg); }
.qs-banner-decor.decor-2 { bottom: -70px; left: 8%; width: 190px; height: 190px; border: 2px solid rgba(240,136,62,.45); border-radius: 50%; }
.qs-actions { margin-top: 2rem; display: flex; gap: .9rem; justify-content: center; flex-wrap: wrap; }
.qs-btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: 44px; border: 1px solid transparent; border-radius: var(--radius-md); padding: .75rem 1.35rem; font-weight: 700; cursor: pointer; transition: .22s ease; }
.qs-btn:hover { transform: translateY(-2px); }
.qs-btn-primary { background: linear-gradient(135deg, var(--accent), #ff6b35); color: var(--white); box-shadow: 0 4px 20px rgba(240,136,62,.35); }
.qs-btn-light { background: var(--white); color: var(--accent); }
.qs-btn-outline { border-color: rgba(255,255,255,.36); color: var(--white); background: rgba(255,255,255,.04); }

.qs-section { padding: var(--space-4xl) var(--space-xl); }
.qs-section.alt { background: var(--gray-50); }
.qs-section.dark { background: var(--primary); color: var(--white); }
.qs-section-head { text-align: center; max-width: 760px; margin: 0 auto var(--space-3xl); }
.qs-tag { display: inline-block; color: var(--accent); font-weight: 800; font-size: .8rem; letter-spacing: 1.5px; }
.qs-section-title { font-family: var(--font-display); font-size: clamp(1.75rem, 3.2vw, 2.65rem); font-weight: 900; line-height: 1.3; margin: .35rem 0 .55rem; color: inherit; }
.qs-section-desc { color: var(--text-secondary); font-size: 1.02rem; }
.qs-section.dark .qs-section-desc { color: rgba(255,255,255,.64); }
.qs-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-lg); }
.qs-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.qs-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.service-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.qs-card { position: relative; overflow: hidden; display: block; min-height: 100%; background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: var(--space-xl); color: var(--text-primary); transition: .25s ease; }
.qs-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--primary-light), var(--accent)); transform: scaleX(0); transform-origin: left; transition: .25s ease; }
.qs-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.qs-card:hover::before { transform: scaleX(1); }
.qs-icon { width: 58px; height: 58px; border-radius: var(--radius-md); display: grid; place-items: center; color: var(--white); background: linear-gradient(135deg, var(--primary-light), var(--primary-lighter)); font-size: 1.45rem; margin-bottom: 1rem; transition: .22s ease; }
.qs-card:hover .qs-icon { background: linear-gradient(135deg, var(--accent), #ff6b35); transform: rotate(-3deg) scale(1.04); }
.qs-card h3 { font-family: var(--font-display); font-size: 1.15rem; margin-bottom: .45rem; color: var(--primary); }
.qs-card p, .qs-card li { color: var(--text-secondary); font-size: .93rem; }
.qs-card ul { list-style: none; margin-top: .8rem; }
.qs-card li { padding: .35rem 0; border-bottom: 1px solid var(--gray-100); }
.qs-chip-row { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .85rem; }
.qs-chip { border-radius: var(--radius-full); background: var(--accent-light); color: var(--accent); padding: .2rem .65rem; font-size: .76rem; font-weight: 700; }
.qs-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; max-width: 840px; margin: 2rem auto 0; }
.qs-stat { text-align: center; }
.qs-stat strong { display: block; font-size: 2rem; color: var(--white); font-weight: 900; }
.qs-stat span { color: rgba(255,255,255,.58); font-size: .85rem; }
.qs-overview { display: grid; grid-template-columns: 1.08fr .92fr; gap: var(--space-2xl); align-items: center; }
.qs-overview p { color: var(--text-secondary); margin-top: .8rem; }
.qs-visual-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.qs-faq details { border-bottom: 1px solid var(--gray-200); padding: 1rem 0; }
.qs-faq summary { cursor: pointer; font-weight: 800; color: var(--primary); }
.qs-faq p { margin-top: .7rem; color: var(--text-secondary); }
.qs-filter { display: flex; justify-content: center; flex-wrap: wrap; gap: .55rem; margin-bottom: var(--space-xl); }
.qs-filter button { border: 1px solid var(--gray-300); background: var(--white); padding: .45rem .9rem; border-radius: var(--radius-full); cursor: pointer; color: var(--text-primary); }
.qs-filter button.active { background: var(--accent); color: var(--white); border-color: var(--accent); }
.qs-case-card { padding: 0; }
.qs-case-image { height: 180px; background: linear-gradient(135deg, var(--primary-light), var(--primary-lighter)); display: flex; align-items: center; justify-content: center; position: relative; color: rgba(255,255,255,.28); font-size: 2.4rem; }
.qs-case-image span { position: absolute; top: 1rem; left: 1rem; padding: .25rem .7rem; border-radius: var(--radius-full); background: rgba(0,0,0,.52); color: var(--white); font-size: .72rem; }
.qs-case-info { padding: var(--space-lg); }
.qs-load-more { display: flex; justify-content: center; margin-top: var(--space-2xl); }
.qs-load-more .qs-btn[hidden] { display: none; }
.qs-load-more .qs-btn:disabled { cursor: progress; opacity: .78; transform: none; }
.qs-loading-inline { grid-column: 1 / -1; min-height: 120px; display: grid; place-items: center; color: var(--text-secondary); }
.qs-contact { display: grid; grid-template-columns: .85fr 1.15fr; gap: var(--space-xl); }
.qs-article { max-width: 920px; }
.qs-article-body { margin-top: var(--space-lg); color: var(--text-primary); font-size: 1rem; line-height: 1.9; }
.qs-article-body p { margin: 0 0 1rem; color: var(--text-secondary); }
.qs-article-body h2, .qs-article-body h3 { color: var(--primary); margin: 1.4rem 0 .7rem; line-height: 1.35; }
.qs-form input, .qs-form select, .qs-form textarea { width: 100%; padding: .72rem .85rem; border: 1px solid var(--gray-300); border-radius: var(--radius-sm); margin-top: .35rem; outline: none; }
.qs-form input:focus, .qs-form select:focus, .qs-form textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(240,136,62,.12); }
.qs-form textarea { min-height: 140px; resize: vertical; }
.qs-form label { display: block; margin-bottom: .75rem; font-weight: 700; font-size: .9rem; }
.qs-form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.qs-msg { display: none; margin-bottom: 1rem; padding: .75rem .9rem; border-radius: var(--radius-sm); }
.qs-msg.ok { display: block; color: #16703c; background: #ecfdf3; border: 1px solid #bbf7d0; }
.qs-msg.err { display: block; color: #a8071a; background: #fff1f0; border: 1px solid #ffa39e; }
.qs-cta { background: linear-gradient(135deg, var(--accent), #ff6b35); color: var(--white); text-align: center; }
.qs-cta p { max-width: 700px; margin: 0 auto 1.35rem; color: rgba(255,255,255,.86); }
.qs-footer { background: var(--primary-dark); color: rgba(255,255,255,.7); padding: var(--space-3xl) var(--space-xl) var(--space-xl); }
.qs-footer-grid { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 1.35fr repeat(4, minmax(0, .9fr)) 1.15fr; gap: var(--space-lg); }
.qs-footer h3, .qs-footer h4 { color: var(--white); margin-bottom: .85rem; }
.qs-footer a { display: block; margin: .42rem 0; color: rgba(255,255,255,.58); }
.qs-footer a:hover { color: var(--accent); }
.qs-footer-bottom { max-width: 1280px; margin: 2rem auto 0; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.08); font-size: .85rem; color: rgba(255,255,255,.42); }
.qs-back-to-top { position: fixed; right: 2rem; bottom: 2rem; width: 44px; height: 44px; display: grid; place-items: center; border: 0; border-radius: 50%; background: var(--accent); color: var(--white); cursor: pointer; box-shadow: 0 4px 16px rgba(240,136,62,.35); opacity: 0; pointer-events: none; transform: translateY(20px); transition: .22s ease; z-index: 999; }
.qs-back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

@media (max-width: 1180px) {
  .qs-nav-mega, .qs-nav-mega.cols-4 { width: 620px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qs-nav-link { padding: 0 .65rem; }
}
@media (max-width: 980px) {
  .qs-grid, .qs-grid.four, .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qs-overview, .qs-contact, .qs-footer-grid { grid-template-columns: 1fr; }
  .qs-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 768px) {
  :root { --space-4xl: 3.5rem; --space-3xl: 2.5rem; }
  .qs-nav-top { display: none; }
  .qs-nav-main { height: 56px; }
  .qs-nav-toggle { display: flex; }
  .qs-nav-menu { position: fixed; top: 0; right: -100%; width: min(320px, 86vw); height: 100vh; padding: 5rem var(--space-xl) var(--space-xl); flex-direction: column; align-items: stretch; overflow-y: auto; background: rgba(10,22,40,.98); backdrop-filter: blur(18px); transition: right .25s ease; }
  .qs-nav-menu.active { right: 0; }
  .qs-nav-item { height: auto; display: block; }
  .qs-nav-link { height: auto; padding: .75rem 0; border-bottom: 0; border-left: 3px solid transparent; font-size: 1rem; }
  .qs-nav-link:hover, .qs-nav-link.active { border-left-color: var(--accent); border-bottom: 0; padding-left: .65rem; }
  .qs-nav-link i { display: none; }
  .qs-nav-dropdown, .qs-nav-mega, .qs-nav-mega.cols-2, .qs-nav-mega.cols-4 { position: static; width: 100%; display: none; grid-template-columns: 1fr; padding: 0 0 0 var(--space-md); background: transparent; color: var(--white); box-shadow: none; opacity: 1; visibility: visible; pointer-events: auto; transform: none; }
  .qs-nav-dropdown.open, .qs-nav-mega.open { display: block; }
  .qs-nav-mega.open { display: grid; }
  .qs-nav-item:hover .qs-nav-dropdown, .qs-nav-item:hover .qs-nav-mega { transform: none; }
  .qs-dropdown-link, .qs-mega-col a { color: rgba(255,255,255,.72); padding: .45rem 0; }
  .qs-dropdown-link:hover, .qs-mega-col a:hover { background: transparent; color: var(--accent); }
  .qs-mega-col h4 { padding: .65rem 0 .1rem; }
  .qs-mega-col .sub-desc { color: rgba(255,255,255,.35); }
  .qs-hero { padding: 7rem 1rem 3.5rem; min-height: 88vh; }
  .qs-banner { padding: 110px 1rem var(--space-2xl); }
  .qs-section { padding: 3rem 1rem; }
  .qs-grid, .qs-grid.four, .qs-grid.two, .service-grid, .qs-form-row, .qs-visual-grid { grid-template-columns: 1fr; }
  .qs-actions { flex-direction: column; align-items: center; }
  .qs-btn { width: min(100%, 260px); }
}