/* ============================================
   菏泽智鼎餐饮设备 - 全站CSS样式表
   用于旋转小火锅设备厂家官网
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

/* CSS Variables */
:root {
  --primary: #C81E1E;       /* 中国红 */
  --primary-dark: #A01616;
  --primary-light: #E83535;
  --accent: #FF6B35;        /* 橙色点缀 */
  --dark: #1A1A2E;
  --gray-900: #2D2D2D;
  --gray-700: #4A4A4A;
  --gray-500: #6B6B6B;
  --gray-300: #CCCCCC;
  --gray-100: #F5F5F5;
  --white: #FFFFFF;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--gray-700);
  background: var(--white);
}

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

a:hover {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--dark);
  line-height: 1.3;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.section-title p {
  color: var(--gray-500);
  font-size: 1.1rem;
}

.section-title .highlight {
  color: var(--primary);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
  background: var(--white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.4rem;
}

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

.logo-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.2;
}

.logo-tagline {
  font-size: 0.75rem;
  color: var(--gray-500);
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  padding: 8px 16px;
  color: var(--gray-700);
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: var(--transition);
}

.nav a:hover,
.nav a.active {
  color: var(--primary);
  background: rgba(200, 30, 30, 0.06);
}

.nav-cta {
  background: var(--primary) !important;
  color: white !important;
  padding: 8px 20px !important;
}

.nav-cta:hover {
  background: var(--primary-dark) !important;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray-700);
  padding: 8px;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  background: linear-gradient(135deg, #1A1A2E 0%, #2D1B1B 50%, #3D1515 100%);
  color: white;
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 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' fill-rule='evenodd'%3E%3Cg fill='%23C81E1E' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='4'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(200, 30, 30, 0.2);
  border: 1px solid rgba(200, 30, 30, 0.3);
  color: #FF8A8A;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  margin-bottom: 24px;
}

.hero h1 {
  color: white;
  font-size: 2.8rem;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero h1 span {
  color: var(--primary-light);
}

.hero-desc {
  color: rgba(255,255,255,0.75);
  font-size: 1.15rem;
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-bottom: 36px;
}

.hero-stat {
  text-align: center;
}

.hero-stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-light);
  display: block;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(200, 30, 30, 0.3);
  color: white;
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  border-color: white;
  background: rgba(255,255,255,0.08);
  color: white;
}

.hero-image {
  background: linear-gradient(135deg, rgba(200,30,30,0.1), rgba(255,107,53,0.1));
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid rgba(255,255,255,0.1);
  text-align: center;
}

.hero-image-icon {
  font-size: 6rem;
  margin-bottom: 16px;
  display: block;
}

.hero-image-text {
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
}

/* ============================================
   ADVANTAGES
   ============================================ */
.advantages {
  padding: 80px 0;
  background: var(--gray-100);
}

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

.advantage-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid transparent;
}

.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(200,30,30,0.2);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
}

.advantage-card h4 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.6;
}

/* ============================================
   PRODUCTS
   ============================================ */
.products {
  padding: 80px 0;
}

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

.product-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid #EEE;
}

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

.product-img {
  height: 200px;
  background: linear-gradient(135deg, #F8F0F0, #F0E8E8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
}

.product-body {
  padding: 24px;
}

.product-body h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.product-body p {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 16px;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.product-tag {
  background: var(--gray-100);
  color: var(--gray-700);
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.78rem;
}

.product-link {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ============================================
   SOLUTIONS
   ============================================ */
.solutions {
  padding: 80px 0;
  background: var(--gray-100);
}

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

.solution-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.solution-header {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 28px 24px;
}

.solution-header .solution-area {
  font-size: 2.4rem;
  font-weight: 700;
  display: block;
  line-height: 1;
}

.solution-header .solution-label {
  font-size: 0.9rem;
  opacity: 0.8;
  margin-top: 4px;
  display: block;
}

.solution-body {
  padding: 24px;
}

.solution-specs {
  list-style: none;
  margin-bottom: 20px;
}

.solution-specs li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid #F0F0F0;
  font-size: 0.92rem;
  color: var(--gray-700);
}

.solution-specs li:last-child {
  border-bottom: none;
}

.solution-specs .spec-dot {
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  flex-shrink: 0;
}

.solution-price {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 2px solid #F0F0F0;
}

.price-tag {
  color: var(--primary);
  font-size: 1.4rem;
  font-weight: 700;
}

.price-note {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* ============================================
   DATA SECTION
   ============================================ */
.data-section {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--dark), #2D1B1B);
  color: white;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.data-item {
  text-align: center;
}

.data-num {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-light);
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}

.data-label {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
}

/* ============================================
   CASES
   ============================================ */
.cases {
  padding: 80px 0;
}

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

.case-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid #EEE;
}

.case-img {
  height: 180px;
  background: linear-gradient(135deg, #F8F0F0, #EDE5E5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
}

.case-body {
  padding: 20px 24px;
}

.case-city {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.case-body h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.case-body p {
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.case-quote {
  font-style: italic;
  color: var(--gray-700);
  font-size: 0.88rem;
  border-left: 3px solid var(--primary);
  padding-left: 12px;
  margin-top: 10px;
}

/* ============================================
   GUIDE PREVIEW
   ============================================ */
.guide-preview {
  padding: 80px 0;
  background: var(--gray-100);
}

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

.guide-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-left: 4px solid var(--primary);
}

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

.guide-card h4 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.guide-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 16px;
}

.guide-link {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 500;
}

/* ============================================
   ABOUT
   ============================================ */
.about-section {
  padding: 80px 0;
}

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

.about-content h2 {
  margin-bottom: 20px;
}

.about-content p {
  color: var(--gray-700);
  margin-bottom: 16px;
}

.about-features {
  list-style: none;
  margin-top: 24px;
}

.about-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  font-size: 0.95rem;
}

.about-check {
  width: 24px;
  height: 24px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.about-image {
  background: linear-gradient(135deg, #F8F0F0, #F0E8E8);
  border-radius: var(--radius-lg);
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  text-align: center;
}

.cta-section h2 {
  color: white;
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255,255,255,0.85);
  font-size: 1.1rem;
  margin-bottom: 36px;
}

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

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

.btn-white:hover {
  background: var(--gray-100);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
  padding: 80px 0;
  background: var(--gray-100);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--gray-500);
}

.contact-form {
  background: white;
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow);
}

.contact-form h3 {
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--gray-700);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(200, 30, 30, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ============================================
   PAGE HEADER (inner pages)
   ============================================ */
.page-header {
  background: linear-gradient(135deg, var(--dark), #2D1B1B);
  color: white;
  padding: 60px 0;
  text-align: center;
}

.page-header h1 {
  color: white;
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.page-header p {
  color: rgba(255,255,255,0.7);
  font-size: 1rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 0.88rem;
}

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

.breadcrumb a:hover {
  color: white;
}

.breadcrumb span {
  color: rgba(255,255,255,0.4);
}

/* ============================================
   CONTENT SECTION (inner pages)
   ============================================ */
.content-section {
  padding: 60px 0;
}

.content-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
}

.sidebar {
  position: sticky;
  top: 90px;
  height: fit-content;
}

.sidebar-menu {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.sidebar-menu a {
  display: block;
  padding: 14px 20px;
  color: var(--gray-700);
  font-size: 0.95rem;
  border-bottom: 1px solid #F0F0F0;
  transition: var(--transition);
}

.sidebar-menu a:last-child {
  border-bottom: none;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
  background: rgba(200, 30, 30, 0.06);
  color: var(--primary);
  padding-left: 28px;
}

.sidebar-contact {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 20px;
}

.sidebar-contact h4 {
  color: white;
  margin-bottom: 12px;
}

.sidebar-contact p {
  font-size: 0.9rem;
  opacity: 0.85;
  margin-bottom: 8px;
}

.sidebar-contact .phone {
  font-size: 1.3rem;
  font-weight: 700;
  color: #FFE066;
  margin-top: 12px;
}

.main-content h2 {
  font-size: 1.8rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #F0F0F0;
}

.main-content h3 {
  font-size: 1.3rem;
  margin: 28px 0 12px;
}

.main-content p {
  margin-bottom: 16px;
  color: var(--gray-700);
}

.main-content ul,
.main-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.main-content li {
  margin-bottom: 8px;
  color: var(--gray-700);
}

.main-content strong {
  color: var(--dark);
}

/* ============================================
   TABLES
   ============================================ */
.table-wrapper {
  overflow-x: auto;
  margin: 20px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius);
  overflow: hidden;
}

table th {
  background: var(--primary);
  color: white;
  padding: 12px 16px;
  text-align: left;
  font-size: 0.9rem;
}

table td {
  padding: 12px 16px;
  border-bottom: 1px solid #F0F0F0;
  font-size: 0.9rem;
}

table tr:nth-child(even) td {
  background: var(--gray-100);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-brand h3 {
  color: white;
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer-col h4 {
  color: white;
  font-size: 1rem;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col a:hover {
  color: white;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px;
  text-align: center;
  font-size: 0.85rem;
  margin-top: 40px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.footer-bottom a {
  color: rgba(255,255,255,0.5);
  margin: 0 8px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 60px 0 80px; }
  .hero h1 { font-size: 2.2rem; }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .data-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-image { height: 300px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .content-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  .nav { display: none; }
  .mobile-toggle { display: block; }
  .hero h1 { font-size: 1.8rem; }
  .hero-stats { gap: 24px; }
  .hero-buttons { flex-direction: column; }
  .advantage-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ============================================
   MOBILE NAV
   ============================================ */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.9);
  z-index: 2000;
  padding: 20px;
  flex-direction: column;
}

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

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}

.mobile-nav-close {
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
}

.mobile-nav a {
  color: white;
  font-size: 1.2rem;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.mt-4 { margin-top: 4px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }