/* ================================================
   AOHEDS Website - Main Stylesheet v2.0
   Oil & Gas Technology Services Company Website
   ================================================ */

/* ─── CSS Variables ─── */
:root {
  /* Primary Colors */
  --primary-dark: #001a3d;
  --primary: #003366;
  --primary-mid: #004488;
  --accent: #e87722;
  --accent-light: #f5a623;
  
  /* Background Colors */
  --bg-white: #ffffff;
  --bg-light: #f0f4f9;
  --bg-dark: #001a3d;
  
  /* Text Colors */
  --text-dark: #1a1a2e;
  --text-gray: #4a5568;
  --text-light: #718096;
  
  /* Borders & Shadows */
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  
  /* Spacing & Border Radius */
  --radius: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
}

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

/* ─── Container ─── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Typography ─── */
.section {
  padding: 96px 0;
}

.section-header {
  margin-bottom: 56px;
}

.section-header.center {
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
  padding: 4px 12px;
  background: rgba(232, 119, 34, 0.08);
  border-radius: 4px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--text-gray);
  line-height: 1.8;
  max-width: 640px;
}

.section-header.center .section-sub {
  margin: 0 auto;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #d66a15;
  border-color: #d66a15;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(232, 119, 34, 0.3);
}

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

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: white;
}

.btn-outline-dark {
  background: transparent;
  color: var(--primary);
  border-color: var(--border);
}

.btn-outline-dark:hover {
  border-color: var(--primary);
  background: rgba(0,51,102,0.05);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

/* ─── Grid Layouts ─── */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section-title { font-size: 1.8rem; }
  .section { padding: 64px 0; }
}

/* ─── Navigation Bar ─── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: var(--transition);
  height: 72px;
}

.navbar.scrolled {
  background: rgba(0, 26, 61, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo-img {
  height: 68px;
  width: auto;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
}

.nav-logo-en {
  font-size: 1.1rem;
  font-weight: 800;
  color: white;
  letter-spacing: 0.05em;
}

.nav-logo-cn {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.7);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  padding: 8px 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: white;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-toggle {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.1);
  padding: 4px;
  border-radius: 6px;
}

.lang-btn {
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  border-radius: 4px;
  transition: var(--transition);
}

.lang-btn.active,
.lang-btn:hover {
  background: var(--accent);
  color: white;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: white;
  transition: var(--transition);
}

.nav-hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.nav-mobile {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--primary-dark);
  padding: 24px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  z-index: 999;
}

.nav-mobile.open {
  display: block;
}

.nav-mobile a {
  display: block;
  padding: 14px 0;
  color: rgba(255,255,255,0.85);
  font-size: 1rem;
  font-weight: 500;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.nav-mobile a:last-child {
  border-bottom: none;
}

.nav-mobile a:hover,
.nav-mobile a.active {
  color: var(--accent);
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}

/* ─── Hero Sections ─── */
.home-hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #00204d 0%, #003366 55%, #004e99 100%);
  display: flex;
  align-items: center;
  padding-top: 72px;
  position: relative;
  overflow: hidden;
}

.home-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23ffffff' fill-opacity='0.025'%3E%3Ccircle cx='30' cy='30' r='1.5'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.home-hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-badge {
  display: inline-block;
  background: rgba(232, 119, 34, 0.2);
  border: 1px solid rgba(232, 119, 34, 0.4);
  color: var(--accent-light);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  color: white;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.8;
  margin-bottom: 32px;
}

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

.hero-diagram-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0.7;
}

.hero-diagram-wrap svg { width: 100%; max-width: 480px; height: auto; }

@media(max-width: 900px) {
  .home-hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-title { font-size: 2.2rem; }
  .hero-actions { justify-content: center; }
  .hero-diagram-wrap { display: none; }
}

/* Page Hero */
.hero-page {
  background: linear-gradient(135deg, #00204d 0%, #003366 100%);
  padding: 140px 0 80px;
  position: relative;
}

.hero-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Ccircle cx='30' cy='30' r='1.5'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 20px;
}

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

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

.hero-breadcrumb .sep {
  opacity: 0.4;
}

.hero-page-title {
  font-size: 2.8rem;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.hero-page-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  max-width: 800px;
  position: relative;
  z-index: 2;
}

/* ─── Stats Bar ─── */
.stats-bar {
  background: var(--primary-dark);
  padding: 40px 0;
}

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

.stat-item {
  padding: 16px;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
}

@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-page-title { font-size: 2rem; }
}

@media (max-width: 480px) {
  .stat-number { font-size: 2rem; }
}

/* ─── Service Cards ─── */
.service-card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.service-card-header {
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--border);
}

.service-card-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--primary-mid));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.service-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
}

.service-card-body {
  padding: 24px;
}

.service-card-text {
  font-size: 0.92rem;
  color: var(--text-gray);
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-list {
  margin-bottom: 16px;
}

.service-list li {
  font-size: 0.88rem;
  color: var(--text-gray);
  padding: 8px 0;
  border-bottom: 1px solid var(--bg-light);
  padding-left: 20px;
  position: relative;
}

.service-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.service-list li:last-child {
  border-bottom: none;
}

/* ─── Software Cards ─── */
.software-card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}

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

.software-card-top {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--border);
}

.software-logo {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 900;
  color: white;
}

.software-card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.software-card-tag {
  font-size: 0.78rem;
  color: var(--text-light);
}

.software-card-body {
  padding: 20px;
}

.software-card-desc {
  font-size: 0.88rem;
  color: var(--text-gray);
  line-height: 1.6;
  margin-bottom: 14px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.feature-tag {
  font-size: 0.72rem;
  padding: 4px 10px;
  background: var(--bg-light);
  border-radius: 12px;
  color: var(--text-gray);
}

/* ─── Cards (About Page) ─── */
.card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.card-text {
  font-size: 0.88rem;
  color: var(--text-gray);
  line-height: 1.6;
}

.divider {
  height: 1px;
  background: var(--border);
}

/* ─── CTA Section ─── */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Ccircle cx='30' cy='30' r='1.5'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.cta-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
  position: relative;
  z-index: 2;
}

/* ─── Footer ─── */
footer {
  background: var(--primary-dark);
  color: white;
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 280px;
}

.footer-logo-img {
  height: 60px;
  width: auto;
}

.footer-desc {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-top: 16px;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: white;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
}

.footer-col ul li a:hover {
  color: var(--accent-light);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
}

.footer-contact-item .ic {
  font-size: 1rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ─── Forms ─── */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--text-dark);
  background: white;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,51,102,0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

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

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-note {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 12px;
}

/* ─── News Page ─── */
.news-filter {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--border);
  background: white;
  color: var(--text-gray);
  transition: var(--transition);
}

.filter-btn.active,
.filter-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.news-card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}

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

.news-card-body {
  padding: 24px;
}

.news-card-cat {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 12px;
}

.news-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-gray);
  line-height: 1.6;
  margin-bottom: 16px;
}

.news-card-meta {
  font-size: 0.8rem;
  color: var(--text-light);
}

.news-empty {
  text-align: center;
  padding: 80px 0;
  color: var(--text-light);
}

.news-empty .icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

/* ─── Contact Page ─── */
.contact-info-card {
  background: var(--primary-dark);
  border-radius: var(--radius-lg);
  padding: 40px;
  height: 100%;
}

.contact-info-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: white;
  margin-bottom: 32px;
}

.cinfo-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.cinfo-icon {
  width: 44px;
  height: 44px;
  background: rgba(232,119,34,0.18);
  border: 1px solid rgba(232,119,34,0.3);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.cinfo-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.45);
  margin-bottom: 4px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.cinfo-value {
  font-size: 0.95rem;
  color: white;
  font-weight: 500;
}

.form-card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 44px;
}

.form-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.form-sub {
  font-size: 0.88rem;
  color: var(--text-gray);
  margin-bottom: 32px;
}

.submit-success {
  display: none;
  background: rgba(34, 197, 94, 0.1);
  border: 1.5px solid rgba(34, 197, 94, 0.4);
  border-radius: var(--radius);
  padding: 16px 20px;
  color: #16a34a;
  font-size: 0.9rem;
  font-weight: 600;
  margin-top: 16px;
}

.submit-success.show {
  display: block;
}

/* ─── Service Detail (Services Page) ─── */
.detail-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}

.detail-section:last-of-type {
  border-bottom: none;
}

.detail-icon-box {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--primary), var(--primary-mid));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 20px;
  flex-shrink: 0;
}

.detail-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.detail-feat {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  background: var(--bg-light);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-gray);
}

.detail-feat::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

.placeholder-note {
  background: rgba(232,119,34,0.06);
  border: 1.5px dashed rgba(232,119,34,0.35);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 16px;
}

@media(max-width:640px) {
  .detail-features {
    grid-template-columns: 1fr;
  }
}

/* ─── Software Detail (Software Page) ─── */
.sw-detail {
  padding: 72px 0;
  border-bottom: 1px solid var(--border);
}

.sw-detail:last-of-type {
  border-bottom: none;
}

.sw-logo-big {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 900;
  color: white;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  flex-shrink: 0;
}

.sw-logo-big.accent-bg {
  background: linear-gradient(135deg, var(--accent), #c95f10);
}

.sw-features-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 20px 0;
}

.sw-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.6;
}

.sw-features-list li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.sw-info-box {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.sw-info-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.sw-info-row:last-child {
  border-bottom: none;
}

.sw-info-row .label {
  color: var(--text-light);
}

.sw-info-row .value {
  font-weight: 600;
  color: var(--primary);
  text-align: right;
}

/* ─── About Page Timeline ─── */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--primary));
}

.timeline-item {
  position: relative;
  margin-bottom: 36px;
}

.timeline-dot {
  position: absolute;
  left: -28px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-year {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}

.timeline-text {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.7;
}

/* ─── About Page Values ─── */
.value-card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 32px 28px;
  text-align: center;
  transition: var(--transition);
}

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

.value-card .icon {
  font-size: 2.4rem;
  margin-bottom: 14px;
}

.value-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}

.value-card p {
  font-size: 0.88rem;
  color: var(--text-gray);
  line-height: 1.7;
}

/* ─── Scroll Reveal Animation ─── */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-delay="1"] { transition-delay: 0.1s; }
[data-reveal-delay="2"] { transition-delay: 0.2s; }
[data-reveal-delay="3"] { transition-delay: 0.3s; }
[data-reveal-delay="4"] { transition-delay: 0.4s; }

/* ─── Utilities ─── */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }