/* ========================================
   朝阳学位英语备考平台 - 主样式表
   ======================================== */

:root {
  --primary: #1a6fc4;
  --primary-dark: #0d5299;
  --primary-light: #e8f2ff;
  --secondary: #f59e0b;
  --success: #10b981;
  --text-main: #1a202c;
  --text-sub: #4a5568;
  --text-muted: #718096;
  --border: #e2e8f0;
  --bg: #f7fafc;
  --white: #ffffff;
  --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 8px 30px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text-main);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- NAVBAR ---- */
.navbar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.brand-icon { font-size: 24px; }
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}
.nav-links { display: flex; gap: 8px; }
.nav-links a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-sub);
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
}
.nav-links a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

/* ---- HERO ---- */
.hero {
  background: linear-gradient(135deg, #1a3a6b 0%, #1a6fc4 60%, #0ea5e9 100%);
  color: white;
  padding: 80px 24px;
  text-align: center;
}
.hero-content { max-width: 720px; margin: 0 auto; }
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 20px;
  padding: 6px 20px;
  font-size: 14px;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero-title {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero-highlight { color: #fbbf24; }
.hero-desc {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-tags {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.hero-tag {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}
.hero-tag-sep {
  font-size: 14px;
  opacity: 0.4;
}
.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-cta {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 28px;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}
.hero-cta-primary {
  background: var(--secondary);
  color: white;
  box-shadow: 0 4px 20px rgba(245,158,11,0.4);
}
.hero-cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(245,158,11,0.5);
  text-decoration: none;
}
.hero-cta-secondary {
  background: rgba(255,255,255,0.15);
  color: white;
  border: 1px solid rgba(255,255,255,0.4);
}
.hero-cta-secondary:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-2px);
  text-decoration: none;
}

/* ---- SUPPORT INTRO ---- */
.support-intro {
  background: var(--white);
  padding: 60px 24px;
  border-bottom: 1px solid var(--border);
}
.support-intro-inner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.support-intro-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
}
.support-intro-text {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.9;
}

/* ---- BENEFITS ---- */
.benefits-section {
  background: var(--bg);
  padding: 60px 24px;
}
.benefits-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.benefits-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 36px;
  text-align: center;
}
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.benefit-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  display: flex;
  gap: 16px;
  align-items: flex-start;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.benefit-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.benefit-icon {
  font-size: 28px;
  flex-shrink: 0;
  margin-top: 2px;
}
.benefit-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}
.benefit-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ---- FLOW ---- */
.flow-section {
  background: var(--white);
  padding: 60px 24px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.flow-inner {
  max-width: 960px;
  margin: 0 auto;
}
.flow-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 36px;
  text-align: center;
}
.flow-steps {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.flow-step {
  text-align: center;
  background: var(--primary-light);
  border-radius: var(--radius);
  padding: 20px 16px;
  min-width: 120px;
  flex: 1;
  max-width: 160px;
}
.step-num {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  margin: 0 auto 10px;
}
.step-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-dark);
  line-height: 1.4;
}
.flow-arrow {
  font-size: 22px;
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* ---- FOOTER DISCLAIMER ---- */
.footer-disclaimer {
  max-width: 800px;
  margin: 0 auto 16px;
  padding: 16px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.7;
  color: #718096;
}

/* ---- CONTACT SECTION ---- */
.contact-section {
  background: var(--bg);
  padding: 60px 24px;
  border-top: 1px solid var(--border);
}
.contact-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.contact-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}
.contact-desc {
  font-size: 16px;
  color: var(--text-sub);
  margin-bottom: 36px;
}
.contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.contact-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--border);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.contact-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.contact-icon {
  font-size: 36px;
  margin-bottom: 12px;
}
.contact-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.contact-phone {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}
.contact-note {
  font-size: 13px;
  color: var(--text-sub);
  margin-top: 4px;
}
.qr-placeholder {
  display: flex;
  justify-content: center;
  margin-bottom: 8px;
}
.qr-box {
  width: 120px;
  height: 120px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.qr-text {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.5;
}
.qr-img {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  box-shadow: var(--shadow-sm);
}

/* ---- COURSES ---- */
.courses-section { max-width: 1200px; margin: 0 auto; padding: 60px 24px; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 30px; font-weight: 700; color: var(--text-main); margin-bottom: 8px; }
.section-header p { color: var(--text-sub); font-size: 16px; }

.chapter-section { margin-bottom: 48px; }
.chapter-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
  display: flex;
  align-items: center;
  gap: 8px;
}
.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.lesson-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}
.lesson-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}
.card-num {
  width: 44px;
  height: 44px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
}
.card-info { flex: 1; }
.card-title { font-weight: 600; color: var(--text-main); font-size: 15px; }
.card-meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.card-arrow { color: var(--text-muted); font-size: 20px; }

/* ---- TIPS ---- */
.tips-section { background: var(--white); padding: 60px 24px; }
.tips-section .section-header { margin-bottom: 36px; }
.tips-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.tip-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  border: 1px solid var(--border);
}
.tip-icon { font-size: 36px; margin-bottom: 12px; }
.tip-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: var(--text-main); }
.tip-card p { font-size: 14px; color: var(--text-sub); line-height: 1.6; }

/* ---- LESSON PAGE ---- */
.lesson-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 0;
  min-height: calc(100vh - 64px);
}

.lesson-sidebar {
  width: 280px;
  flex-shrink: 0;
  background: var(--white);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
}
.sidebar-header {
  padding: 0 20px 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar-header h3 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.back-btn {
  font-size: 13px;
  color: var(--primary);
  display: block;
}
.chapter-badge {
  margin: 12px 20px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  display: inline-block;
}
.sidebar-lessons { padding: 8px 12px; }
.sidebar-chapter {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 12px 8px 4px;
  letter-spacing: 0.5px;
}
.sidebar-lesson {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-sub);
  text-decoration: none;
  transition: all 0.15s;
  margin-bottom: 2px;
  line-height: 1.4;
}
.sidebar-lesson:hover {
  background: var(--primary-light);
  color: var(--primary);
  text-decoration: none;
}
.sidebar-lesson.active {
  background: var(--primary);
  color: white;
  font-weight: 600;
}

.lesson-main {
  flex: 1;
  padding: 40px 48px;
  min-width: 0;
}
.lesson-header { margin-bottom: 32px; }
.lesson-meta {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}
.lesson-num {
  background: var(--primary);
  color: white;
  font-size: 13px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 20px;
}
.lesson-chapter {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  padding: 3px 12px;
  border-radius: 20px;
}
.lesson-main-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
}

/* ---- LESSON CONTENT ---- */
.lesson-content {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 32px;
}
.lesson-content .lesson-title {
  display: none; /* Hidden since we show it in lesson-header */
}
.lesson-content h3.section-heading {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 28px 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
}
.lesson-content p {
  margin-bottom: 12px;
  color: var(--text-main);
  line-height: 1.8;
}
.lesson-content .example-block {
  background: #f0f9ff;
  border: 1px solid #bae6fd;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 15px;
}
.example-label {
  font-weight: 700;
  color: #0284c7;
  margin-right: 8px;
}
.lesson-content .list-item {
  padding: 6px 0 6px 16px;
  border-left: 2px solid var(--border);
  margin: 6px 0;
  color: var(--text-sub);
}
.lesson-content .note-block {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 14px;
  color: #92400e;
}

/* Lesson navigation */
.lesson-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.nav-btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--text-sub);
}
.nav-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  text-decoration: none;
}
.home-btn { color: var(--primary); border-color: var(--primary); }

/* ---- EXAM PAGE ---- */
.page-header {
  background: linear-gradient(135deg, #1a3a6b, #1a6fc4);
  color: white;
  text-align: center;
  padding: 60px 24px;
}
.page-header h1 { font-size: 36px; font-weight: 800; margin-bottom: 8px; }
.page-header p { font-size: 16px; opacity: 0.85; }

.exams-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px;
}
.exam-notice {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  font-size: 15px;
  color: var(--text-sub);
}
.notice-icon { font-size: 20px; }
.exams-grid { display: flex; flex-direction: column; gap: 16px; margin-bottom: 48px; }
.exam-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: var(--shadow-sm);
}
.exam-card.featured { border-color: var(--primary); }
.exam-card.special { border-color: var(--secondary); }
.exam-year {
  width: 72px;
  height: 72px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  flex-shrink: 0;
  text-align: center;
}
.exam-card.featured .exam-year { background: var(--primary); color: white; }
.exam-card.special .exam-year { background: #fef3c7; color: #d97706; }
.exam-info { flex: 1; }
.exam-info h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.exam-info p { font-size: 14px; color: var(--text-sub); }
.exam-tags { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.tag {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2px 10px;
  font-size: 12px;
  color: var(--text-sub);
}
.exam-status { font-size: 14px; font-weight: 600; }
.exam-status.hot { color: #ef4444; }

/* ---- CONTACT ---- */
.contact-section, .contact-section-about {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px;
  border: 1px solid var(--border);
  text-align: center;
}
.contact-section h2, .contact-section-about h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}
.contact-section p, .contact-section-about p { color: var(--text-sub); margin-bottom: 24px; }
.contact-methods {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg);
  padding: 16px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  text-align: left;
}
.contact-icon { font-size: 32px; }
.contact-text strong { font-size: 15px; display: block; margin-bottom: 4px; }
.contact-text p { font-size: 13px; color: var(--text-sub); margin: 0; }

/* ---- ABOUT PAGE ---- */
.about-container { max-width: 960px; margin: 0 auto; padding: 48px 24px; }
.about-intro {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  margin-bottom: 60px;
}
.about-text h2 { font-size: 26px; font-weight: 700; margin-bottom: 16px; }
.about-text p { color: var(--text-sub); margin-bottom: 12px; line-height: 1.8; }
.about-logo-box {
  background: linear-gradient(135deg, var(--primary-light), #dbeafe);
  border-radius: 20px;
  padding: 40px 32px;
  text-align: center;
  border: 1px solid #bfdbfe;
  min-width: 200px;
}
.logo-big { font-size: 64px; margin-bottom: 12px; }
.logo-text { font-size: 18px; font-weight: 700; color: var(--primary-dark); }
.logo-sub { font-size: 13px; color: var(--text-sub); margin-top: 4px; }

.services-section { margin-bottom: 60px; }
.services-section h2 { font-size: 24px; font-weight: 700; margin-bottom: 24px; }
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.service-icon { font-size: 40px; margin-bottom: 12px; }
.service-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.service-card p { font-size: 14px; color: var(--text-sub); }

.faq-section { margin-bottom: 48px; }
.faq-section h2 { font-size: 24px; font-weight: 700; margin-bottom: 20px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px 24px;
  border: 1px solid var(--border);
}
.faq-q { font-weight: 700; color: var(--primary); margin-bottom: 8px; font-size: 15px; }
.faq-a { color: var(--text-sub); font-size: 14px; line-height: 1.7; }

.contact-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 28px 32px;
  line-height: 2;
}
.contact-card p { font-size: 16px; }
.contact-note {
  margin-top: 16px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}
.contact-note p { font-size: 14px; color: #065f46; }

/* ---- FOOTER ---- */
.footer {
  background: #1a202c;
  color: #a0aec0;
  text-align: center;
  padding: 40px 24px;
  font-size: 14px;
}
.footer-content {
  max-width: 960px;
  margin: 0 auto 24px;
  display: flex;
  justify-content: space-around;
  gap: 32px;
  flex-wrap: wrap;
  text-align: left;
}
.footer-brand h3 { color: white; font-size: 18px; margin-bottom: 8px; }
.footer-links h4 { color: white; margin-bottom: 12px; }
.footer-links a { display: block; color: #a0aec0; text-decoration: none; margin-bottom: 6px; }
.footer-links a:hover { color: white; }
.footer-bottom { border-top: 1px solid #2d3748; padding-top: 20px; }

/* ---- ACCESS CONTROL (Lesson Pages) ---- */
.access-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(26, 32, 44, 0.75);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.access-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px 32px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.access-card .lock-icon {
  font-size: 48px;
  margin-bottom: 16px;
}
.access-card h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}
.access-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 24px;
}
.access-card .qr-inline {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  margin-bottom: 8px;
}
.access-card .tel-inline {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 20px;
}
.access-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--text-muted);
  font-size: 13px;
}
.access-divider::before,
.access-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.access-form {
  display: none;
  margin-top: 16px;
}
.access-form.active { display: block; }
.access-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  margin-bottom: 12px;
  text-align: center;
  letter-spacing: 2px;
}
.access-input:focus {
  outline: none;
  border-color: var(--primary);
}
.access-btn {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
}
.access-btn:hover { background: var(--primary-dark); }
.access-btn-secondary {
  width: 100%;
  padding: 12px;
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  margin-bottom: 10px;
  transition: all 0.2s;
}
.access-btn-secondary:hover {
  background: var(--primary-light);
}
.access-error {
  color: #dc2626;
  font-size: 13px;
  margin-top: 8px;
  display: none;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero-title { font-size: 30px; }
  .hero-desc { font-size: 15px; }
  .hero-tags { gap: 6px; }
  .hero-tag { font-size: 12px; padding: 4px 10px; }
  .hero-cta-group { flex-direction: column; align-items: center; }
  .hero-cta { width: 100%; max-width: 300px; text-align: center; }
  .support-intro-title { font-size: 22px; }
  .benefits-title { font-size: 20px; }
  .benefits-grid { grid-template-columns: 1fr; }
  .flow-steps { flex-direction: column; gap: 4px; }
  .flow-step { max-width: 100%; min-width: auto; }
  .flow-arrow { transform: rotate(90deg); font-size: 18px; }
  .flow-title { font-size: 20px; }
  .lesson-container { flex-direction: column; }
  .lesson-sidebar {
    width: 100%;
    height: auto;
    position: static;
    max-height: 300px;
  }
  .lesson-main { padding: 24px 20px; }
  .about-intro { grid-template-columns: 1fr; }
  .about-logo-box { min-width: auto; }
}