/* ==========================================
   吃货儿校园官网 - 样式表
   品牌色：活力橙 #FF6B35
   ========================================== */

/* CSS变量 */
:root {
  --primary: #FF6B35;
  --primary-dark: #E55A2B;
  --primary-light: #FF8A5C;
  --secondary: #2D3748;
  --text: #333333;
  --text-light: #666666;
  --text-lighter: #999999;
  --bg: #FFFFFF;
  --bg-gray: #F7F8FA;
  --bg-dark: #1A202C;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 30px rgba(255, 107, 53, 0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
}

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
}

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

ul {
  list-style: none;
}

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

/* 通用容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 按钮样式 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-large {
  padding: 16px 40px;
  font-size: 16px;
}

/* ==========================================
   导航栏
   ========================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  z-index: 1000;
  padding: 15px 0;
}

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

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

.logo-img {
  height: 40px;
  width: auto;
}

.logo-icon {
  font-size: 28px;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 40px;
}

.nav-links a {
  font-size: 15px;
  color: var(--text);
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

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

.nav-cta .btn-primary {
  padding: 10px 24px;
}

/* 移动端导航开关（窄屏下 .nav-links 默认隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--secondary);
  border-radius: 1px;
  transition: var(--transition);
}

.navbar.is-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.navbar.is-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.navbar.is-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ==========================================
   首页英雄区
   ========================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #FFF5F0 0%, #FFFFFF 50%, #FFF8F5 100%);
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 70%;
  height: 150%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  padding: 60px 0;
}

.hero-title {
  font-size: 72px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: -2px;
}

.hero-subtitle {
  font-size: 32px;
  color: var(--secondary);
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 40px;
}

.hero-btns {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 80px;
}

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

.stat-num {
  display: block;
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  font-size: 14px;
  color: var(--text-light);
}

/* ==========================================
   功能模块
   ========================================== */
.features {
  padding: 100px 0;
  background: var(--bg);
}

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

.section-header h2 {
  font-size: 40px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 16px;
}

.section-header p {
  font-size: 18px;
  color: var(--text-light);
}

.section-header.light h2,
.section-header.light p {
  color: white;
}

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

.feature-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid #F0F0F0;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-light);
}

/* ==========================================
   价值主张
   ========================================== */
.value {
  padding: 80px 0;
  background: var(--bg-gray);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.value-item {
  text-align: center;
  padding: 40px 30px;
}

.value-icon {
  font-size: 56px;
  margin-bottom: 20px;
}

.value-item h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.value-item p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ==========================================
   关于我们
   ========================================== */
.about {
  padding: 100px 0;
  background: var(--bg);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 60px;
  align-items: center;
}

.about-text h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
}

.about-text > p {
  font-size: 16px;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-highlights {
  margin-top: 40px;
}

.highlight-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--bg-gray);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.highlight-icon {
  font-size: 32px;
  flex-shrink: 0;
}

.highlight-item h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 4px;
}

.highlight-item p {
  font-size: 14px;
  color: var(--text-light);
}

.about-image {
  display: flex;
  justify-content: center;
}

.about-placeholder {
  width: 350px;
  height: 350px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
}

.about-placeholder span {
  font-size: 100px;
}

.about-placeholder p {
  font-size: 24px;
  font-weight: 600;
  margin-top: 16px;
}

.about-logo {
  max-width: 300px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ==========================================
   代理商招募
   ========================================== */
.join {
  padding: 100px 0;
  background: var(--bg-dark);
}

.join-content {
  max-width: 1000px;
  margin: 0 auto;
}

.join-benefits {
  margin-bottom: 60px;
}

.join-benefits h3,
.join-models h3,
.join-cta h3 {
  font-size: 24px;
  font-weight: 600;
  color: white;
  margin-bottom: 30px;
  text-align: center;
}

.benefit-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.benefit-item {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.benefit-icon {
  font-size: 36px;
  flex-shrink: 0;
}

.benefit-text h4 {
  font-size: 18px;
  font-weight: 600;
  color: white;
  margin-bottom: 8px;
}

.benefit-text p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.join-models {
  margin-bottom: 60px;
}

.model-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.model-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  padding: 32px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.model-card:hover {
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.08);
}

.model-card.featured {
  border-color: var(--primary);
  background: rgba(255, 107, 53, 0.1);
}

.model-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.model-icon {
  font-size: 32px;
}

.model-header h4 {
  font-size: 20px;
  font-weight: 600;
  color: white;
}

.model-list {
  margin-bottom: 20px;
}

.model-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 12px;
}

.model-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

.model-suitable {
  font-size: 13px;
  color: var(--primary-light);
  font-style: italic;
}

.join-cta {
  text-align: center;
}

.join-cta > p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 30px;
}

.join-form {
  max-width: 600px;
  margin: 0 auto;
}

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

.join-form input,
.join-form select,
.join-form textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  color: white;
  font-size: 15px;
  transition: var(--transition);
}

.join-form input::placeholder,
.join-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.join-form input:focus,
.join-form select:focus,
.join-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.15);
}

.join-form select option {
  color: var(--text);
  background: var(--bg-dark);
}

.join-form textarea {
  margin-bottom: 24px;
  resize: vertical;
}

.join-form .btn-primary {
  width: 100%;
}

/* ==========================================
   联系我们
   ========================================== */
.contact {
  padding: 100px 0;
  background: var(--bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 60px;
}

.contact-item {
  text-align: center;
  padding: 40px 20px;
  background: var(--bg-gray);
  border-radius: var(--radius);
}

.contact-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.contact-item h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 8px;
}

.contact-item p {
  font-size: 15px;
  color: var(--text-light);
}

.contact-mail {
  color: var(--primary);
  font-weight: 600;
  word-break: break-all;
}

.contact-mail:hover {
  text-decoration: underline;
}

.contact-note {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-lighter);
  line-height: 1.5;
}

.contact-qr {
  display: flex;
  justify-content: center;
  gap: 60px;
}

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

.qr-placeholder {
  width: 160px;
  height: 160px;
  background: var(--bg-gray);
  border: 2px dashed #DDD;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  margin: 0 auto 16px;
  color: var(--text-lighter);
}

.qr-img {
  width: 160px;
  height: 160px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  object-fit: cover;
}

.qr-item p {
  font-size: 14px;
  color: var(--text-light);
  margin-top: 16px;
}

/* ==========================================
   页脚
   ========================================== */
.footer {
  background: var(--bg-dark);
  padding: 60px 0 30px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 30px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.footer-logo {
  height: 50px;
  width: auto;
}

.footer-brand .logo-text {
  color: white;
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 4px;
}

.footer-links {
  display: flex;
  gap: 30px;
}

.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 8px;
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .about-image {
    order: -1;
  }
  
  .about-placeholder {
    width: 280px;
    height: 280px;
  }
}

@media (max-width: 768px) {
  .nav-content {
    flex-wrap: wrap;
    row-gap: 12px;
  }

  .nav-toggle {
    display: flex;
    order: 2;
    margin-left: auto;
  }

  .nav-links {
    display: none;
    order: 4;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 16px;
    border-top: 1px solid #f0f0f0;
  }

  .nav-links a {
    padding: 14px 4px;
    border-bottom: 1px solid #f5f5f5;
  }

  .nav-links a::after {
    display: none;
  }

  .navbar.is-open .nav-links {
    display: flex;
  }

  .nav-cta {
    order: 3;
  }

  .nav-cta .btn-primary {
    padding: 8px 16px;
    font-size: 14px;
  }
  
  .hero-title {
    font-size: 48px;
  }
  
  .hero-subtitle {
    font-size: 24px;
  }
  
  .hero-stats {
    gap: 40px;
  }
  
  .stat-num {
    font-size: 32px;
  }
  
  .section-header h2 {
    font-size: 32px;
  }
  
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .value-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .benefit-list {
    grid-template-columns: 1fr;
  }
  
  .model-cards {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-qr {
    flex-direction: column;
    align-items: center;
    gap: 30px;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-btns {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .about-placeholder {
    width: 220px;
    height: 220px;
  }
  
  .about-placeholder span {
    font-size: 72px;
  }
}