/* ===== CSS RESET & VARIABLES ===== */
:root {
  --primary: #1A3C6E;
  --primary-light: #2B6CB0;
  --accent: #00B4D8;
  --accent-light: #48CAE4;
  --dark: #0d1b2a;
  --text: #333333;
  --text-light: #666666;
  --text-lighter: #999999;
  --white: #ffffff;
  --off-white: #f4f7fb;
  --border: #e2e8f0;
  --shadow: 0 4px 20px rgba(26,60,110,0.12);
  --shadow-lg: 0 10px 40px rgba(26,60,110,0.18);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-en: 'Rajdhani', 'Open Sans', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif; color: var(--text); background: var(--white); line-height: 1.7; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; outline: none; }
input, textarea, select { font-family: inherit; outline: none; }

/* ===== UTILITY ===== */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-header.light { color: var(--white); }
.section-tag { display: inline-block; font-family: var(--font-en); font-size: 13px; font-weight: 600; letter-spacing: 3px; color: var(--primary-light); text-transform: uppercase; margin-bottom: 12px; padding: 4px 16px; border: 1px solid var(--primary-light); border-radius: 20px; }
.section-header.light .section-tag { color: var(--white); border-color: rgba(255,255,255,0.4); }
.section-title { font-size: 36px; font-weight: 700; color: var(--primary); margin-bottom: 12px; letter-spacing: 2px; }
.section-header.light .section-title { color: var(--white); }
.section-sub { font-size: 16px; color: var(--text-light); }
.section-header.light .section-sub { color: rgba(255,255,255,0.75); }

/* ===== BUTTONS ===== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: 8px; font-size: 15px; font-weight: 600; transition: var(--transition); cursor: pointer; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: var(--white); box-shadow: 0 4px 15px rgba(26,60,110,0.35); }
.btn-primary:hover { background: linear-gradient(135deg, var(--primary-light), var(--primary)); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(26,60,110,0.45); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.6); }
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: var(--white); transform: translateY(-2px); }
.btn-outline-dark { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline-dark:hover { background: var(--primary); color: var(--white); }
.btn-block { width: 100%; justify-content: center; }

/* ===== HEADER ===== */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.96); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); transition: var(--transition); }
.site-header.scrolled { background: rgba(255,255,255,0.98); box-shadow: 0 4px 20px rgba(26,60,110,0.1); }
.header-inner { max-width: 1280px; margin: 0 auto; padding: 0 24px; height: 72px; display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { width: 44px; height: 44px; object-fit: contain; }
.logo-text { display: flex; flex-direction: column; }
.logo-name { font-size: 18px; font-weight: 700; color: var(--primary); letter-spacing: 2px; line-height: 1.2; }
.logo-en { font-family: var(--font-en); font-size: 10px; font-weight: 500; color: var(--primary-light); letter-spacing: 3px; }

.main-nav ul { display: flex; align-items: center; gap: 4px; }
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a { display: flex; align-items: center; gap: 4px; padding: 10px 14px; color: var(--text-light); font-size: 14px; font-weight: 500; border-radius: 6px; transition: var(--transition); }
.main-nav > ul > li > a::after { content: ''; display: inline-block; width: 4px; height: 4px; background: var(--primary-light); border-radius: 50%; margin-left: 2px; opacity: 0; transition: var(--transition); }
.main-nav > ul > li:hover > a, .main-nav > ul > li.active > a { color: var(--primary); }
.main-nav > ul > li:hover > a::after, .main-nav > ul > li.active > a::after { opacity: 1; }
.main-nav > ul > li:hover > a { background: rgba(26,60,110,0.04); }

/* Sub Menu */
.has-sub .sub-menu { position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(8px); background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); border: 1px solid var(--border); border-radius: 10px; padding: 8px 0; min-width: 180px; opacity: 0; visibility: hidden; transition: var(--transition); box-shadow: var(--shadow-lg); }
.has-sub:hover .sub-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.sub-menu a { display: block; padding: 10px 20px; color: var(--text-light); font-size: 13px; transition: var(--transition); white-space: nowrap; }
.sub-menu a:hover { background: rgba(26,60,110,0.04); color: var(--primary); padding-left: 24px; }

/* Mobile Toggle */
.mobile-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; background: transparent; cursor: pointer; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--primary); border-radius: 2px; transition: var(--transition); }

/* ===== HERO ===== */
.hero { position: relative; height: 100vh; min-height: 700px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; background: linear-gradient(135deg, #0d1b2a 0%, #1A3C6E 50%, #2B6CB0 100%); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(13,27,42,0.85) 0%, rgba(26,60,110,0.75) 50%, rgba(43,108,176,0.5) 100%); z-index: 1; }
.hero-particles { position: absolute; inset: 0; z-index: 2; background-image: radial-gradient(2px 2px at 20% 30%, rgba(255,255,255,0.1) 0%, transparent 100%), radial-gradient(2px 2px at 80% 70%, rgba(255,255,255,0.1) 0%, transparent 100%); animation: particleFloat 20s ease-in-out infinite; }
@keyframes particleFloat { 0%,100% { opacity: 0.6; } 50% { opacity: 1; } }
.hero-content { position: relative; z-index: 3; text-align: center; color: var(--white); max-width: 900px; padding: 0 24px; }
.hero-title { font-size: clamp(40px, 6vw, 72px); font-weight: 700; line-height: 1.15; margin-bottom: 20px; letter-spacing: 4px; }
.hero-title .line1 { display: block; font-size: clamp(36px, 5vw, 60px); }
.hero-title .line2 { display: block; background: linear-gradient(90deg, #ffffff, #a8d5f0); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: 18px; color: rgba(255,255,255,0.8); margin-bottom: 40px; letter-spacing: 2px; font-family: var(--font-en); }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-scroll { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 3; }
.scroll-mouse { width: 24px; height: 38px; border: 2px solid rgba(255,255,255,0.4); border-radius: 12px; display: flex; justify-content: center; padding-top: 6px; }
.scroll-wheel { width: 3px; height: 8px; background: var(--white); border-radius: 2px; animation: scrollDown 2s infinite; }
@keyframes scrollDown { 0% { opacity: 1; transform: translateY(0); } 100% { opacity: 0; transform: translateY(12px); } }

/* ===== STATS BAR ===== */
.stats-bar { background: linear-gradient(135deg, var(--primary), var(--primary-light)); padding: 48px 0; margin-top: -1px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stat-item { text-align: center; padding: 20px 24px; position: relative; }
.stat-item:not(:last-child)::after { content: ''; position: absolute; right: 0; top: 20%; height: 60%; width: 1px; background: rgba(255,255,255,0.2); }
.stat-item i { font-size: 28px; color: rgba(255,255,255,0.6); margin-bottom: 8px; }
.stat-num { font-family: var(--font-en); font-size: 42px; font-weight: 700; color: var(--white); line-height: 1; }
.stat-num::after { content: attr(data-unit, ''); font-size: 18px; color: rgba(255,255,255,0.6); }
.stat-label { font-size: 14px; color: rgba(255,255,255,0.7); margin-top: 4px; }

/* ===== HEADER WEATHER ===== */
.header-weather { display: flex; align-items: center; gap: 6px; padding: 6px 14px; background: rgba(26,60,110,0.06); border-radius: 20px; border: 1px solid rgba(26,60,110,0.1); font-size: 13px; color: var(--primary); font-weight: 600; white-space: nowrap; transition: var(--transition); }
.header-weather:hover { background: rgba(26,60,110,0.1); }
.header-weather i.fa-map-marker-alt { font-size: 11px; color: var(--primary-light); }
#headerWeatherIcon { font-size: 14px; color: var(--primary-light); }
#headerWeatherTemp { font-family: var(--font-en); font-weight: 700; }

/* ===== ABOUT ===== */
.about-section { background: var(--off-white); }
.about-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: center; }
.about-img { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-img img { width: 100%; height: 420px; object-fit: cover; }
.about-img-badge { position: absolute; bottom: 24px; right: 24px; background: rgba(26,60,110,0.92); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.15); border-radius: 12px; padding: 16px 20px; text-align: center; }
.badge-num { font-family: var(--font-en); font-size: 36px; font-weight: 700; color: var(--white); display: block; line-height: 1; }
.badge-num sup { font-size: 18px; }
.badge-text { font-size: 12px; color: rgba(255,255,255,0.7); }
.about-text h3 { font-size: 24px; color: var(--primary); margin-bottom: 16px; }
.about-text p { color: var(--text-light); margin-bottom: 16px; font-size: 15px; }
.about-text strong { color: var(--primary); }
.about-values { display: flex; flex-direction: column; gap: 20px; margin-top: 28px; }
.value-item { display: flex; gap: 16px; align-items: flex-start; }
.value-icon { width: 44px; height: 44px; background: linear-gradient(135deg, rgba(26,60,110,0.08), rgba(26,60,110,0.04)); border: 1px solid rgba(26,60,110,0.15); border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.value-icon i { color: var(--primary-light); font-size: 18px; }
.value-item h4 { font-size: 15px; color: var(--primary); font-weight: 600; margin-bottom: 2px; }
.value-item p { font-size: 13px; color: var(--text-light); margin: 0; }

/* ===== SERVICES ===== */
.dark-section { background: linear-gradient(180deg, var(--primary) 0%, #152d54 100%); position: relative; overflow: hidden; }
.dark-section::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.03) 0%, transparent 60%); pointer-events: none; }
.services-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.service-card { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius); padding: 32px 24px; transition: var(--transition); position: relative; overflow: hidden; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, rgba(255,255,255,0.5), rgba(255,255,255,0.8)); transform: scaleX(0); transition: var(--transition); }
.service-card:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.2); transform: translateY(-6px); box-shadow: 0 20px 40px rgba(0,0,0,0.25); }
.service-card:hover::before { transform: scaleX(1); }
.service-card-icon { width: 56px; height: 56px; background: linear-gradient(135deg, rgba(255,255,255,0.12), rgba(255,255,255,0.04)); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.service-card-icon i { font-size: 24px; color: rgba(255,255,255,0.8); }
.service-card h3 { font-size: 17px; font-weight: 600; color: var(--white); margin-bottom: 12px; }
.service-card p { font-size: 13px; color: rgba(255,255,255,0.55); margin-bottom: 16px; line-height: 1.6; }
.service-list { margin-bottom: 20px; }
.service-list li { font-size: 12px; color: rgba(255,255,255,0.45); padding: 4px 0; padding-left: 16px; position: relative; }
.service-list li::before { content: '▸'; position: absolute; left: 0; color: rgba(255,255,255,0.5); font-size: 10px; top: 50%; transform: translateY(-50%); }
.service-more { font-size: 13px; color: rgba(255,255,255,0.7); display: inline-flex; align-items: center; gap: 6px; font-weight: 500; }
.service-more:hover { gap: 10px; color: var(--white); }

/* ===== LOW ALTITUDE DETAIL ===== */
.low-alt-section { background: var(--off-white); padding: 0; }
.detail-hero { position: relative; height: 420px; overflow: hidden; }
.detail-hero img { width: 100%; height: 100%; object-fit: cover; }
.detail-hero-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13,27,42,0.85) 0%, rgba(26,60,110,0.7) 100%); display: flex; align-items: center; justify-content: center; }
.detail-hero-overlay .section-header { margin-bottom: 0; }
.detail-content { padding: 80px 0; }
.detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.detail-item { background: var(--white); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); transition: var(--transition); border-left: 4px solid var(--primary); }
.detail-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.detail-icon { width: 48px; height: 48px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.detail-icon i { font-size: 20px; color: var(--white); }
.detail-item h4 { font-size: 17px; color: var(--primary); margin-bottom: 10px; }
.detail-item p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* ===== SCENARIOS ===== */
.scenarios-section { background: var(--white); }
.scenarios-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 20px; margin-bottom: 64px; }
.scenario-lg, .scenario-card { position: relative; border-radius: var(--radius); overflow: hidden; height: 420px; cursor: pointer; }
.scenario-side { display: flex; flex-direction: column; gap: 20px; }
.scenario-side .scenario-card { height: 200px; }
.scenario-card img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.scenario-card:hover img { transform: scale(1.05); }
.scenario-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13,27,42,0.2) 0%, rgba(13,27,42,0.85) 100%); padding: 28px; display: flex; flex-direction: column; justify-content: flex-end; }
.scenario-icon { width: 44px; height: 44px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; }
.scenario-icon i { font-size: 18px; color: rgba(255,255,255,0.8); }
.scenario-overlay h3 { font-size: 20px; color: var(--white); margin-bottom: 8px; }
.scenario-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.scenario-tag { background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); color: rgba(255,255,255,0.8); font-size: 11px; padding: 2px 10px; border-radius: 20px; }
.scenario-overlay p { font-size: 13px; color: rgba(255,255,255,0.65); line-height: 1.6; }

/* ===== TEAM ===== */
.team-section { background: var(--off-white); }
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.team-card { background: var(--white); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); transition: var(--transition); position: relative; border: 1px solid var(--border); text-align: center; }
.team-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.team-badge { position: absolute; top: 20px; right: 20px; font-size: 11px; font-weight: 600; color: var(--primary); background: rgba(26,60,110,0.08); padding: 3px 12px; border-radius: 4px; letter-spacing: 1px; }
.team-avatar { width: 80px; height: 80px; margin: 0 auto 16px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--primary-light)); display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 15px rgba(26,60,110,0.25); }
.avatar-placeholder { font-size: 28px; font-weight: 700; color: var(--white); }
.team-info { text-align: left; }
.team-info h4 { font-size: 18px; color: var(--primary); margin-bottom: 4px; text-align: center; }
.team-title { font-size: 13px; color: var(--primary-light); font-weight: 600; display: block; margin-bottom: 12px; text-align: center; }
.team-meta { font-size: 13px; color: var(--text-light); line-height: 1.7; margin-bottom: 14px; }
.team-tags { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.team-tags span { background: rgba(26,60,110,0.06); color: var(--primary); font-size: 11px; padding: 3px 10px; border-radius: 4px; border: 1px solid rgba(26,60,110,0.12); }

/* ===== PARTNERS ===== */
.partners-section { background: var(--white); }
.partners-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 40px; }
.partner-tab { padding: 10px 28px; border-radius: 8px; background: var(--off-white); color: var(--text-light); font-size: 14px; font-weight: 500; transition: var(--transition); border: 1px solid transparent; }
.partner-tab:hover { color: var(--primary); }
.partner-tab.active { background: var(--primary); color: var(--white); box-shadow: 0 4px 12px rgba(26,60,110,0.3); }
.partners-content { }
.partner-panel { display: none; }
.partner-panel.active { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.partner-item { display: flex; align-items: center; gap: 16px; padding: 24px; background: var(--off-white); border-radius: var(--radius); border: 1px solid var(--border); transition: var(--transition); }
.partner-item:hover { border-color: var(--primary-light); background: rgba(26,60,110,0.03); }
.partner-item i { font-size: 24px; color: var(--primary-light); flex-shrink: 0; width: 40px; text-align: center; }
.partner-item span { font-size: 14px; color: var(--text); font-weight: 500; }

/* ===== NEWS ===== */
.news-section { background: var(--off-white); }
.news-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 24px; margin-bottom: 40px; }
.news-card { background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.news-featured { }
.news-img { position: relative; height: 200px; overflow: hidden; }
.news-featured .news-img { height: 260px; }
.news-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.news-card:hover .news-img img { transform: scale(1.05); }
.news-cat { position: absolute; top: 16px; left: 16px; background: var(--primary); color: var(--white); font-size: 11px; padding: 3px 12px; border-radius: 4px; font-weight: 600; }
.news-body { padding: 24px; }
.news-date { font-size: 12px; color: var(--text-lighter); display: block; margin-bottom: 8px; font-family: var(--font-en); }
.news-body h4 { font-size: 15px; color: var(--primary); margin-bottom: 10px; line-height: 1.5; }
.news-featured .news-body h4 { font-size: 18px; }
.news-body p { font-size: 13px; color: var(--text-light); line-height: 1.7; margin-bottom: 14px; }
.news-link { font-size: 13px; color: var(--primary-light); font-weight: 500; display: inline-flex; align-items: center; gap: 4px; }
.news-link:hover { gap: 8px; }

/* ===== CONTACT ===== */
.contact-section { position: relative; padding: 100px 0; }
.contact-bg { position: absolute; inset: 0; z-index: 0; }
.contact-bg img { width: 100%; height: 100%; object-fit: cover; }
.contact-bg-overlay { position: absolute; inset: 0; background: rgba(13,27,42,0.85); }
.contact-section .container { position: relative; z-index: 1; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 64px; align-items: start; }
.contact-info { }
.contact-item { display: flex; gap: 20px; margin-bottom: 36px; }
.contact-icon { width: 52px; height: 52px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.15); border-radius: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-icon i { font-size: 20px; color: rgba(255,255,255,0.7); }
.contact-item h4 { font-size: 15px; color: var(--white); margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: rgba(255,255,255,0.65); line-height: 1.6; }
.contact-form { background: rgba(255,255,255,0.06); backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius); padding: 40px; }
.contact-form h3 { font-size: 20px; color: var(--white); margin-bottom: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; color: rgba(255,255,255,0.6); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 16px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); border-radius: 8px; color: var(--white); font-size: 14px; transition: var(--transition); }
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(255,255,255,0.3); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: rgba(255,255,255,0.4); background: rgba(255,255,255,0.12); }
.form-group select option { background: var(--dark); color: var(--white); }
.form-group textarea { resize: vertical; }

/* ===== FOOTER ===== */
.site-footer { background: var(--primary); }
.footer-main { padding: 64px 0; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 48px; }
.footer-brand { }
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-logo img { width: 40px; height: 40px; object-fit: contain; }
.footer-logo span { font-size: 18px; font-weight: 700; color: var(--white); letter-spacing: 2px; }
.footer-brand p { font-size: 13px; color: rgba(255,255,255,0.5); line-height: 1.8; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a { width: 36px; height: 36px; background: rgba(255,255,255,0.08); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); font-size: 14px; transition: var(--transition); }
.footer-social a:hover { background: rgba(255,255,255,0.15); color: var(--white); }
.footer-col h4 { font-size: 15px; color: var(--white); margin-bottom: 20px; font-weight: 600; }
.footer-links { }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-links a:hover { color: var(--white); padding-left: 6px; }
.footer-contact li { font-size: 13px; color: rgba(255,255,255,0.5); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.footer-contact i { color: rgba(255,255,255,0.6); width: 16px; }
.footer-bottom { padding: 20px 0; text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.35); }
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--white); }

/* ===== BACK TOP ===== */
.back-top { position: fixed; bottom: 32px; right: 32px; width: 44px; height: 44px; background: var(--primary); color: var(--white); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 18px; cursor: pointer; opacity: 0; visibility: hidden; transition: var(--transition); z-index: 999; box-shadow: var(--shadow); }
.back-top.visible { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--primary-light); transform: translateY(-2px); }

/* ===== ANIMATIONS ===== */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 1024px) {
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .scenario-lg { height: 360px; }
  .scenario-side { flex-direction: row; }
  .scenario-side .scenario-card { flex: 1; height: 200px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2)::after { display: none; }
  .news-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-panel { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .section { padding: 70px 0; }
  .section-title { font-size: 28px; }
  .mobile-toggle { display: flex; }
  .main-nav { position: fixed; top: 72px; left: 0; right: 0; bottom: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); padding: 20px; transform: translateX(-100%); transition: var(--transition); overflow-y: auto; }
  .main-nav.open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav > ul > li > a { padding: 14px 16px; font-size: 15px; color: var(--text); }
  .sub-menu { position: static; transform: none !important; opacity: 1 !important; visibility: visible !important; background: rgba(26,60,110,0.04); border-radius: 8px; margin-top: 4px; }
  .sub-menu a { padding: 10px 24px; color: var(--text-light); }
  .hero { min-height: 600px; }
  .hero-title { font-size: 32px; }
  .hero-sub { font-size: 15px; }
  .services-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
  .detail-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .scenario-side { flex-direction: column; }
  .header-weather { display: none; }
}
@media (max-width: 480px) {
  .hero-btns { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .partner-panel { grid-template-columns: 1fr; }
  .stat-num { font-size: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .partners-tabs { flex-wrap: wrap; }
}