/* ==========================================
   云网信息科技 · 企业官网
   CSS 主样式表
   ========================================== */

/* --- CSS Variables --- */
:root {
  --primary-dark: #0a2647;
  --primary-blue: #2563eb;
  --primary-light: #3b82f6;
  --accent-gold: #d4a853;
  --accent-gold-light: #e8c97a;
  --bg-light: #f8fafc;
  --white: #ffffff;
  --text-dark: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-light: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.18);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --max-width: 1200px;
  --header-height: 72px;
  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-sans);
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

.section-header .accent-line {
  width: 48px;
  height: 3px;
  background: var(--accent-gold);
  margin: 16px auto 20px;
  border-radius: 2px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-blue);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
  background: var(--white);
  color: var(--primary-dark);
  border-color: var(--white);
  transform: translateY(-2px);
}

.btn-gold {
  background: var(--accent-gold);
  color: var(--primary-dark);
  box-shadow: 0 4px 14px rgba(212, 168, 83, 0.35);
}

.btn-gold:hover {
  background: var(--accent-gold-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212, 168, 83, 0.45);
}

/* ====================================
   HEADER / NAVIGATION
   ==================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 38, 71, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  height: var(--header-height);
  transition: var(--transition);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.header.scrolled {
  background: rgba(10, 38, 71, 0.98);
  box-shadow: 0 2px 30px rgba(0,0,0,0.2);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-gold));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--white);
  font-weight: 800;
}

.logo-text {
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.logo-text span {
  color: var(--accent-gold);
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 6px;
  transition: var(--transition);
}

.nav a:hover,
.nav a.active {
  color: var(--white);
  background: rgba(255,255,255,0.08);
}

.nav a.active {
  color: var(--accent-gold);
}

.header-phone {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-gold);
  font-weight: 600;
  font-size: 0.95rem;
  margin-left: 16px;
  white-space: nowrap;
}

.header-phone i {
  font-size: 1rem;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ====================================
   HERO SECTION
   ==================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--primary-dark);
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(10,38,71,0.7) 0%, rgba(10,38,71,0.85) 100%),
    url('../images/hero-bg.png') center center / cover no-repeat;
  background-blend-mode: overlay;
  z-index: 1;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 2;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-lines {
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: hidden;
}

.hero-lines::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    conic-gradient(from 0deg at 50% 50%, transparent 0%, rgba(37,99,235,0.05) 25%, transparent 50%);
  animation: rotate-lines 30s linear infinite;
}

@keyframes rotate-lines {
  to { transform: rotate(360deg); }
}

.hero .container {
  position: relative;
  z-index: 5;
  width: 100%;
}

.hero-content {
  max-width: 720px;
  padding: 60px 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 6px 18px;
  border-radius: 50px;
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero-badge i {
  color: var(--accent-gold);
  font-size: 0.75rem;
}

.hero h1 {
  font-size: 3.25rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--primary-light), var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: 24px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
}

.hero-meta-item i {
  color: var(--accent-gold);
  font-size: 0.9rem;
}

/* ====================================
   CARDS (Core Capabilities)
   ==================================== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  color: var(--white);
}

.card-icon.blue { background: linear-gradient(135deg, var(--primary-blue), #1d4ed8); }
.card-icon.gold { background: linear-gradient(135deg, var(--accent-gold), #c49a3f); }
.card-icon.teal { background: linear-gradient(135deg, #0891b2, #06b6d4); }
.card-icon.green { background: linear-gradient(135deg, #059669, #10b981); }

.card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 12px;
}

.card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ====================================
   STATS / DATA ROW
   ==================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item .stat-number {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--primary-blue);
  line-height: 1.1;
  margin-bottom: 8px;
}

.stat-item .stat-number .suffix {
  font-size: 1.5rem;
  color: var(--accent-gold);
}

.stat-item .stat-label {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ====================================
   TABS (Scenario Labels)
   ==================================== */
.scenario-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 40px;
}

.scenario-tab {
  padding: 10px 24px;
  border-radius: 50px;
  border: 1px solid var(--border-light);
  background: var(--white);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
}

.scenario-tab:hover,
.scenario-tab.active {
  background: var(--primary-blue);
  color: var(--white);
  border-color: var(--primary-blue);
}

/* ====================================
   PROCESS / TIMELINE
   ==================================== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-step .step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-blue);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 auto 16px;
  position: relative;
  z-index: 2;
}

.process-step .step-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dark);
}

/* ====================================
   ADVANTAGES
   ==================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-item {
  display: flex;
  gap: 16px;
  padding: 24px;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.advantage-item:hover {
  background: var(--white);
  box-shadow: var(--shadow-md);
}

.advantage-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--accent-gold);
  background: rgba(212, 168, 83, 0.1);
}

.advantage-item h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 4px;
}

.advantage-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ====================================
   LOGO WALL
   ==================================== */
.logo-wall {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  align-items: center;
  padding: 20px 0;
  max-width: 1100px;
  margin: 0 auto;
}

.logo-wall-item {
  padding: 16px 32px;
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
}

.logo-wall-item:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
  box-shadow: var(--shadow-sm);
}

.logo-item {
  height: 110px;
  width: calc(20% - 24px);
  max-width: none;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: var(--transition);
  padding: 16px 20px;
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  box-sizing: border-box;
}

.logo-item:hover {
  filter: grayscale(0%);
  opacity: 1;
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-sm);
}

.logo-item-text {
  padding: 12px 24px;
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}

.logo-item-text:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
  box-shadow: var(--shadow-sm);
}

/* ====================================
   LICENSE DISPLAY
   ==================================== */
.license-display {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-md);
  text-align: center;
  max-width: 500px;
  margin: 0 auto;
}

.license-display img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.license-display .license-id {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ====================================
   SOLUTIONS GRID (4场景卡)
   ==================================== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.solution-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-gold));
  opacity: 0;
  transition: var(--transition);
}

.solution-card:hover::before {
  opacity: 1;
}

.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.solution-card .card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  margin-bottom: 16px;
}

.solution-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.solution-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.solution-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-blue);
  font-weight: 600;
  font-size: 0.9rem;
}

.solution-card .card-link:hover {
  gap: 10px;
}

/* ====================================
   CONTACT / CTA BANNER
   ==================================== */
.cta-banner {
  background: linear-gradient(135deg, var(--primary-dark), #0f3460);
  padding: 80px 0;
  text-align: center;
}

.cta-banner h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.cta-banner p {
  color: rgba(255,255,255,0.7);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ====================================
   FOOTER
   ==================================== */
.footer {
  background: #071a30;
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  margin-top: 16px;
  max-width: 320px;
}

.footer h4 {
  color: var(--white);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  padding: 6px 0;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent-gold);
  padding-left: 4px;
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.footer-contact i {
  color: var(--accent-gold);
  width: 16px;
  text-align: center;
}

.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: 12px;
}

/* ====================================
   PAGE HEADER (Subpages)
   ==================================== */
.page-header {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, rgba(10,38,71,0.82), rgba(15,52,96,0.82)), url('../images/guangxian-header.png');
  background-size: cover;
  background-position: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-gold));
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.6);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.4);
}

.breadcrumb a {
  color: rgba(255,255,255,0.6);
}

.breadcrumb a:hover {
  color: var(--accent-gold);
}

.breadcrumb span {
  color: var(--accent-gold);
}

/* ====================================
   CONTENT PAGES
   ==================================== */
.content-section {
  padding: 80px 0;
}

.content-section.alt {
  background: var(--bg-light);
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.content-grid.reverse {
  direction: rtl;
}

.content-grid.reverse > * {
  direction: ltr;
}

.content-text h3 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 20px;
  line-height: 1.3;
}

.content-text p {
  font-size: 1rem;
  color: var(--text-muted);
  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(--text-muted);
  font-size: 0.95rem;
}

.content-text ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-blue);
  font-weight: 700;
}

.content-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.content-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Feature list with checkmarks */
.feature-list {
  display: grid;
  gap: 16px;
}

.feature-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.feature-list li i {
  color: #10b981;
  font-size: 1.1rem;
  margin-top: 3px;
  flex-shrink: 0;
}

/* ====================================
   CONTACT PAGE
   ==================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
}

.contact-info-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.contact-info-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 24px;
}

.contact-detail {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-detail-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
  font-size: 1.2rem;
}

.contact-detail h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 2px;
}

.contact-detail p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-form {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.contact-form h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group.full { grid-column: 1 / -1; }

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  background: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ====================================
   ABOUT PAGE
   ==================================== */
.about-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px;
}

.about-intro h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 20px;
}

.about-intro p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.9;
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.mission-card {
  text-align: center;
  padding: 40px 24px;
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.mission-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.mission-card .mission-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
}

.mission-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.mission-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ====================================
   SCROLL TO TOP
   ==================================== */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-blue);
  color: var(--white);
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
}

/* ====================================
   RESPONSIVE
   ==================================== */

/* Tablet */
@media (max-width: 1024px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .content-grid { grid-template-columns: 1fr; gap: 40px; }
  .content-grid.reverse { direction: ltr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2.75rem; }
  .section { padding: 80px 0; }
}

/* Mobile */
@media (max-width: 768px) {
  :root { --header-height: 64px; }

  .menu-toggle { display: flex; }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(10, 38, 71, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
  }

  .header-phone {
    margin-left: 0;
    margin-top: 8px;
    padding: 8px 16px;
    border-top: 1px solid rgba(255,255,255,0.08);
    width: 100%;
    justify-content: center;
  }

  .hero { min-height: auto; padding: 120px 0 80px; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-meta { flex-direction: column; gap: 12px; }
  .section-header h2 { font-size: 1.75rem; }

  .cards-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stat-item .stat-number { font-size: 2rem; }
  .solutions-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: 24px; }
  .process-steps .step-number { margin: 0 auto 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .page-header { padding: 110px 0 60px; }
  .page-header h1 { font-size: 1.75rem; }
  .logo-text { font-size: 1.1rem; }
  .contact-info-card,
  .contact-form { padding: 28px 24px; }
  .form-grid { grid-template-columns: 1fr; }
  .mission-grid { grid-template-columns: 1fr; }
  .scroll-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }
}

@media (max-width: 480px) {
  .section { padding: 60px 0; }
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.7rem; }
  .section-header h2 { font-size: 1.5rem; }
  .stat-item .stat-number { font-size: 1.7rem; }
  .stats-grid { gap: 16px; }
}