/* ========================================
   CSS Variables
   ======================================== */
:root {
  --primary-blue: #1a237e;
  --gradient-blue: #3949ab;
  --accent-cyan: #03a9f4;
  --cta-orange: #ff6b35;
  --secondary-orange: #f7931e;
  --tech-purple: #4f46e5;
  --balance-teal: #06b6d4;
  --accent-teal: #06b6d4;
  --text-dark: #1e293b;
  --text-medium: #475569;
  --text-light: #94a3b8;
  --bg-light: #f8fafc;
  --bg-muted: #eef2ff;
  --white: #ffffff;
  --shadow-light: 0 10px 40px rgba(15, 23, 42, 0.08);
  --shadow-medium: 0 18px 50px rgba(15, 23, 42, 0.12);
  --border-radius: 16px;
  --transition: all 0.3s ease;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Microsoft YaHei', '微软雅黑', Arial, Helvetica, sans-serif;
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

ul { list-style: none; }

a {
  text-decoration: none;
  color: inherit;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  color: var(--text-dark);
}

h1 { font-size: clamp(2.4rem, 4vw, 3.5rem); line-height: 1.2; }
h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2.4vw, 1.6rem); }

p { font-size: 1rem; color: var(--text-medium); }

/* Utility */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: linear-gradient(120deg, rgba(3, 169, 244, 0.12), rgba(79, 70, 229, 0.12));
  color: var(--gradient-blue);
}

.section-heading {
  text-align: center;
  margin-bottom: 3rem;
}

.section-heading.align-left {
  text-align: left;
  max-width: 720px;
}

.section-heading p {
  margin-top: 1rem;
}

.btn-primary,
.btn-secondary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.8rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-blue), var(--tech-purple));
  color: var(--white);
  box-shadow: var(--shadow-light);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.btn-secondary {
  background: rgba(3, 169, 244, 0.12);
  color: var(--gradient-blue);
}

.btn-secondary:hover {
  background: rgba(3, 169, 244, 0.2);
}

.btn-outline {
  border: 2px solid rgba(3, 169, 244, 0.4);
  color: var(--gradient-blue);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--gradient-blue);
  color: var(--gradient-blue);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(26, 35, 126, 0.9);
  backdrop-filter: blur(12px);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(15, 23, 42, 0.9);
  box-shadow: 0 10px 40px rgba(15, 23, 42, 0.15);
}

.nav-container {
  width: min(1200px, 92vw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo a {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--white);
  background: linear-gradient(120deg, var(--accent-cyan), var(--balance-teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: rgba(255, 255, 255, 0.92);
  font-weight: 500;
  position: relative;
  padding: 0.25rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  transition: var(--transition);
}

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

.nav-cta {
  padding: 0.65rem 1.4rem;
  background: linear-gradient(135deg, var(--accent-cyan), var(--balance-teal));
  border-radius: 999px;
  color: var(--white);
  font-weight: 600;
}

.nav-cta::after { display: none; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.bar {
  width: 26px;
  height: 3px;
  background: var(--white);
  transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  padding: 160px 0 120px;
  background: linear-gradient(135deg, rgba(26, 35, 126, 0.1), rgba(3, 169, 244, 0.08));
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 3rem;
  align-items: center;
}

.hero-content {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.hero-list {
  margin: 1.5rem 0;
  display: grid;
  gap: 0.75rem;
}

.hero-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-medium);
}

.hero-list i {
  color: var(--accent-cyan);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.stat-item {
  min-width: 140px;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gradient-blue);
}

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

.hero-visual {
  display: grid;
  gap: 1.5rem;
}

.visual-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 1.8rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.visual-card i {
  font-size: 1.8rem;
  color: var(--accent-cyan);
  margin-bottom: 1rem;
}

.visual-card.accent {
  background: linear-gradient(135deg, var(--gradient-blue), var(--tech-purple));
  color: var(--white);
}

.visual-card.accent i {
  color: var(--white);
}

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

/* ========================================
   Solutions Section
   ======================================== */
.solutions {
  padding: 100px 0;
  background: var(--white);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.solution-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-light);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: var(--transition);
}

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

.solution-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(3, 169, 244, 0.12), rgba(79, 70, 229, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gradient-blue);
  font-size: 1.4rem;
}

.solution-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--gradient-blue);
  font-weight: 600;
}

/* ========================================
   Advantages
   ======================================== */
.advantages {
  padding: 100px 0;
  background: var(--bg-light);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.advantage-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2.2rem;
  box-shadow: var(--shadow-light);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: var(--transition);
}

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

.advantage-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(3, 169, 244, 0.12), rgba(79, 70, 229, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gradient-blue);
  font-size: 1.6rem;
}

.advantage-list {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.advantage-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-medium);
  font-size: 0.95rem;
}

.advantage-list i { color: var(--accent-cyan); }

/* ========================================
   Process
   ======================================== */
.process {
  padding: 100px 0;
  background: var(--white);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.process-step {
  background: var(--bg-light);
  border-radius: var(--border-radius);
  padding: 2rem;
  border: 1px solid rgba(3, 169, 244, 0.12);
  transition: var(--transition);
}

.process-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-light);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(3, 169, 244, 0.16), rgba(79, 70, 229, 0.16));
  color: var(--gradient-blue);
  font-weight: 700;
  margin-bottom: 1.2rem;
}

/* ========================================
   Stats
   ======================================== */
.stats {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(26, 35, 126, 0.9), rgba(79, 70, 229, 0.9));
  color: var(--white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.stats .stat-number {
  color: var(--white);
  font-size: 2.2rem;
}

.stats .stat-label { color: rgba(255, 255, 255, 0.85); }

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
  padding: 100px 0;
  background: var(--white);
}

.cta-card {
  background: linear-gradient(135deg, rgba(26, 35, 126, 0.92), rgba(79, 70, 229, 0.92));
  border-radius: calc(var(--border-radius) + 6px);
  padding: clamp(2rem, 4vw, 3.2rem);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  box-shadow: var(--shadow-medium);
}

.cta-text p { color: rgba(255, 255, 255, 0.85); }

.cta-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.cta-card .btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--white);
}

.cta-card .btn-outline:hover {
  border-color: var(--white);
}

/* ========================================
   Contact
   ======================================== */
.contact {
  padding: 100px 0;
  background: var(--bg-light);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.5rem;
  align-items: start;
}

.contact-info {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-light);
}

.contact-cards {
  display: grid;
  gap: 1rem;
  margin: 1.8rem 0;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem 1.4rem;
  border-radius: var(--border-radius);
  background: rgba(3, 169, 244, 0.08);
  transition: var(--transition);
}

.contact-card i {
  font-size: 1.6rem;
  color: var(--gradient-blue);
}

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

.contact-note {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.2rem;
  border-radius: 12px;
  background: rgba(79, 70, 229, 0.08);
  color: var(--text-medium);
}

.contact-form-wrapper {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-light);
}

.contact-form {
  display: grid;
  gap: 1.5rem;
}

.form-group {
  display: grid;
  gap: 0.6rem;
}

.form-group label {
  font-weight: 600;
  color: var(--text-dark);
}

.form-group input,
.form-group textarea {
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 12px;
  padding: 0.85rem 1rem;
  font-size: 1rem;
  transition: var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 4px rgba(3, 169, 244, 0.15);
  outline: none;
}

textarea { resize: vertical; }

.submit-button {
  padding: 0.9rem 1.6rem;
  border-radius: 999px;
  border: none;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  background: linear-gradient(135deg, var(--gradient-blue), var(--tech-purple));
  color: var(--white);
  transition: var(--transition);
}

.submit-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: #0f172a;
  color: var(--white);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
}

.footer-title {
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer-badges {
  display: grid;
  gap: 0.6rem;
  margin-top: 1.2rem;
}

.footer-badges span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.8);
}

.footer-links {
  display: grid;
  gap: 0.6rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer-links a:hover { color: var(--white); }

.footer-contact {
  display: grid;
  gap: 0.6rem;
  color: rgba(255, 255, 255, 0.8);
}

.footer-contact i { color: var(--accent-cyan); }

.social-links {
  display: flex;
  gap: 0.8rem;
  margin-top: 1.2rem;
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--accent-cyan);
}

.footer-bottom {
  margin-top: 3rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* ========================================
   Inner Page Layouts
   ======================================== */
.page-hero {
  padding: 160px 0 110px;
  background: linear-gradient(135deg, rgba(26, 35, 126, 0.12), rgba(3, 169, 244, 0.1));
}

.page-hero-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 3rem;
  align-items: center;
}

.page-hero-visual {
  display: grid;
  gap: 1.5rem;
}

.page-hero-text .hero-stats {
  margin-top: 1.8rem;
}

.page-section {
  padding: 90px 0;
}

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

.results-section .stat-card {
  background: var(--white);
  box-shadow: var(--shadow-light);
  color: var(--text-dark);
}

.results-section .stat-number {
  color: var(--gradient-blue);
}

.results-section .stat-label {
  color: var(--text-medium);
}

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

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(3, 169, 244, 0.12), rgba(79, 70, 229, 0.12));
  color: var(--gradient-blue);
  font-size: 1.4rem;
}

.icon-list {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.icon-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-medium);
  font-size: 0.95rem;
}

.icon-list i { color: var(--accent-cyan); }

.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.plan-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2.2rem;
  box-shadow: var(--shadow-light);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  border: 1px solid rgba(3, 169, 244, 0.12);
}

.plan-card.highlight {
  border: none;
  background: linear-gradient(135deg, rgba(26, 35, 126, 0.96), rgba(79, 70, 229, 0.96));
  color: var(--white);
  box-shadow: var(--shadow-medium);
}

.plan-card.highlight p,
.plan-card.highlight li,
.plan-card.highlight span { color: rgba(255, 255, 255, 0.85); }

.plan-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  background: rgba(3, 169, 244, 0.15);
  color: var(--gradient-blue);
}

.plan-list {
  display: grid;
  gap: 0.6rem;
}

.plan-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cta-banner {
  padding: 80px 0;
  background: var(--bg-light);
}

.cta-banner-card {
  background: var(--white);
  border-radius: calc(var(--border-radius) + 4px);
  padding: clamp(1.8rem, 4vw, 2.8rem);
  box-shadow: var(--shadow-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.case-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2.2rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.case-industry {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: rgba(3, 169, 244, 0.12);
  color: var(--gradient-blue);
  font-size: 0.85rem;
  font-weight: 600;
}

.case-metrics {
  display: grid;
  gap: 0.6rem;
  color: var(--text-medium);
}

.case-metrics li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.case-metrics i { color: var(--accent-cyan); }

.insight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
}

.insight-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

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

.insight-card h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

/* ========================================
   SEO Learning Page
   ======================================== */
.page-header {
  padding: 140px 0 90px;
  background: linear-gradient(135deg, var(--primary-blue), var(--gradient-blue));
  color: var(--white);
  text-align: center;
}

.page-title {
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  color: var(--white);
  margin-bottom: 1rem;
}

.page-subtitle {
  color: rgba(255, 255, 255, 0.85);
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.7;
}

.learning-resources {
  padding: 90px 0;
  background: var(--bg-light);
}

.resources-categories {
  width: min(1000px, 92vw);
  margin: 0 auto;
  display: grid;
  gap: 3rem;
}

.category-section {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 2.2rem;
  box-shadow: var(--shadow-light);
}

.category-title {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  color: var(--text-dark);
}

.category-title i {
  color: var(--accent-cyan);
}

.resource-list {
  display: grid;
  gap: 1rem;
}

.resource-item {
  padding: 1.6rem;
  border-radius: var(--border-radius);
  border: 1px solid rgba(3, 169, 244, 0.12);
  transition: var(--transition);
  background: rgba(255, 255, 255, 0.9);
}

.resource-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-light);
  border-color: rgba(79, 70, 229, 0.35);
}

.resource-title {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.resource-description {
  color: var(--text-medium);
  margin-bottom: 0.8rem;
}

.resource-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--gradient-blue);
  font-weight: 600;
}

/* ========================================
   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);
}

body.loaded .hero-content {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 992px) {
  .nav-menu {
    position: absolute;
    top: 72px;
    right: 20px;
    background: rgba(15, 23, 42, 0.96);
    flex-direction: column;
    padding: 1.5rem;
    border-radius: 16px;
    gap: 1rem;
    display: none;
    min-width: 220px;
    box-shadow: var(--shadow-medium);
  }

  .nav-menu.active { display: flex; }

  .nav-toggle { display: flex; }

  .hero-grid,
  .page-hero-grid,
  .contact-grid,
  .cta-card {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .cta-card { align-items: flex-start; }
}

@media (max-width: 768px) {
  .hero { padding: 140px 0 90px; }
  .page-hero { padding: 140px 0 90px; }
  .section-heading { margin-bottom: 2.5rem; }
  .hero-actions { justify-content: center; }
  .cta-banner-card { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 576px) {
  .hero-stats,
  .hero-actions { justify-content: flex-start; }
  .solution-card,
  .advantage-card,
  .feature-card,
  .plan-card,
  .case-card,
  .insight-card { padding: 1.6rem; }
  .contact-card { flex-direction: column; align-items: flex-start; }
  .plan-footer { flex-direction: column; align-items: flex-start; }
  .footer {
    padding: 60px 0 30px;
  }
}

/* ========================================
   Batch Open Tool Page
   ======================================== */
.tool-hero {
  background: linear-gradient(135deg, rgba(0, 150, 136, 0.12), rgba(79, 70, 229, 0.1));
}

.tool-section {
  position: relative;
}

.tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}

.tool-card {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-light);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tool-card-main {
  border: 1px solid rgba(79, 70, 229, 0.16);
}

.tool-card-side {
  background: linear-gradient(135deg, rgba(3, 169, 244, 0.08), rgba(0, 150, 136, 0.08));
  border: 1px solid rgba(3, 169, 244, 0.12);
}

.tool-form .form-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.tool-form label {
  font-weight: 600;
  color: var(--text-dark);
}

.tool-textarea {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(26, 35, 126, 0.12);
  padding: 1.2rem;
  resize: vertical;
  min-height: 220px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-light);
  transition: var(--transition);
}

.tool-textarea:focus {
  outline: none;
  border-color: var(--gradient-blue);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
  background: var(--white);
}

.tool-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  align-items: end;
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-medium);
}

.option-group input[type="checkbox"] {
  width: auto;
}

.option-group input[type="number"] {
  border-radius: 12px;
  border: 1px solid rgba(26, 35, 126, 0.12);
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  background: var(--bg-light);
  transition: var(--transition);
}

.option-group input[type="number"]:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 4px rgba(3, 169, 244, 0.15);
  background: var(--white);
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.tool-hint {
  font-size: 0.9rem;
  color: var(--text-medium);
  background: rgba(255, 193, 7, 0.15);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.tool-feedback {
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 12px;
  padding: 0.9rem 1rem;
  background: rgba(79, 70, 229, 0.08);
  color: var(--gradient-blue);
  min-height: 24px;
}

.tool-feedback.success {
  background: rgba(0, 150, 136, 0.12);
  color: var(--accent-teal);
}

.tool-feedback.warning {
  background: rgba(255, 193, 7, 0.15);
  color: #b18000;
}

.tool-feedback.error {
  background: rgba(244, 67, 54, 0.12);
  color: #c62828;
}

.tool-preview {
  list-style: decimal;
  display: grid;
  gap: 0.6rem;
  font-size: 0.95rem;
  color: var(--text-dark);
  padding-left: 1.2rem;
}

.tool-preview li {
  background: rgba(255, 255, 255, 0.6);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  border: 1px solid rgba(26, 35, 126, 0.08);
  word-break: break-all;
}

.tool-summary {
  font-weight: 600;
  color: var(--gradient-blue);
}

.tool-tips {
  display: grid;
  gap: 1rem;
}

.tool-tips h4 {
  font-size: 1.1rem;
  color: var(--text-dark);
}

.tool-tips .icon-list li {
  background: rgba(255, 255, 255, 0.4);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
}

.tool-tips .icon-list i {
  color: var(--accent-teal);
}

.tool-usage {
  background: var(--bg-light);
}

.usage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
}

.usage-card {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-light);
  padding: 2rem;
  display: grid;
  gap: 1rem;
  border: 1px solid rgba(79, 70, 229, 0.08);
}

.usage-card p {
  color: var(--text-medium);
  font-size: 0.95rem;
}

.usage-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(3, 169, 244, 0.15), rgba(0, 150, 136, 0.15));
  color: var(--gradient-blue);
  font-size: 1.4rem;
}

@media (max-width: 992px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .tool-options {
    grid-template-columns: 1fr;
  }

  .tool-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .tool-textarea {
    min-height: 180px;
  }
}

/* ========================================
   Search Engine Submission Page
   ======================================== */
.search-submit-header {
  background: linear-gradient(135deg, rgba(57, 73, 171, 0.12), rgba(3, 169, 244, 0.12));
  padding: 6rem 0 4rem;
  text-align: center;
}

.search-submit-header .section-tag {
  margin-bottom: 1.2rem;
}

.search-submit-header .page-subtitle {
  margin-top: 1rem;
  max-width: 720px;
  margin-inline: auto;
}

.search-submit-intro {
  padding: 4rem 0;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 2.5rem;
  align-items: stretch;
}

.intro-content {
  display: grid;
  gap: 1.5rem;
}

.intro-list li {
  background: rgba(57, 73, 171, 0.08);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  color: var(--text-dark);
}

.intro-list i {
  color: var(--accent-teal);
  font-size: 1rem;
}

.intro-card {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-light);
  padding: 2rem;
  display: grid;
  gap: 1rem;
  border: 1px solid rgba(3, 169, 244, 0.16);
}

.intro-card h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.intro-card i {
  color: var(--accent-cyan);
}

.intro-card ul {
  display: grid;
  gap: 0.75rem;
  color: var(--text-medium);
  font-size: 0.95rem;
}

.intro-card strong {
  color: var(--text-dark);
}

.search-submit-table {
  padding: 4rem 0;
  background: var(--bg-light);
}

.table-wrapper {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-light);
  overflow-x: auto;
  border: 1px solid rgba(57, 73, 171, 0.08);
}

.search-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

.search-table thead {
  background: linear-gradient(135deg, rgba(57, 73, 171, 0.12), rgba(6, 182, 212, 0.12));
}

.search-table th,
.search-table td {
  padding: 1.4rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

.search-table th {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dark);
}

.search-table tbody tr:last-child td {
  border-bottom: none;
}

.search-table tbody tr:hover {
  background: rgba(3, 169, 244, 0.05);
}

.engine-name {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.engine-name span {
  display: block;
}

.engine-name strong {
  font-size: 1.05rem;
  color: var(--text-dark);
}

.engine-name span:last-child {
  display: block;
  font-size: 0.9rem;
  color: var(--text-light);
}

.engine-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--white);
  font-size: 1.1rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
}

.engine-icon.google { background: linear-gradient(135deg, #4285f4, #1a73e8); }
.engine-icon.bing { background: linear-gradient(135deg, #008373, #00a4ef); }
.engine-icon.yandex { background: linear-gradient(135deg, #ff2d55, #ff6b6b); }
.engine-icon.baidu { background: linear-gradient(135deg, #2932e1, #3f51b5); }
.engine-icon.duck { background: linear-gradient(135deg, #de5833, #f7931e); }
.engine-icon.seznam { background: linear-gradient(135deg, #d61c4e, #ff6f91); }
.engine-icon.naver { background: linear-gradient(135deg, #2db400, #0b8f2f); }

.link-highlight {
  color: var(--gradient-blue);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.link-highlight i {
  font-size: 0.85rem;
}

.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-teal);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
}

.table-note {
  margin-top: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-medium);
  font-size: 0.95rem;
}

.table-note i {
  color: var(--accent-cyan);
}

.search-submit-tips {
  padding: 4rem 0 5rem;
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
}

.tip-card {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-light);
  padding: 2rem;
  display: grid;
  gap: 1rem;
  border: 1px solid rgba(57, 73, 171, 0.12);
}

.tip-card h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-dark);
}

.tip-card i {
  color: var(--cta-orange);
}

.tip-card p {
  font-size: 0.95rem;
  color: var(--text-medium);
}

@media (max-width: 992px) {
  .intro-grid {
    grid-template-columns: 1fr;
  }

  .intro-card {
    order: -1;
  }
}

@media (max-width: 768px) {
  .search-submit-header {
    padding: 5rem 0 3rem;
  }

  .search-table {
    min-width: 640px;
  }

  .search-table th,
  .search-table td {
    padding: 1rem;
  }

  .table-note {
    align-items: flex-start;
  }
}

@media (max-width: 576px) {
  .search-submit-header .page-title {
    font-size: 2rem;
  }

  .engine-name {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  .engine-icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}