:root {
  --bg-color: #151311;
  --panel-bg: #24211d;
  --card-bg: #2b2824;
  --primary-color: #c89e77;
  --primary-hover: #b78648;
  --secondary-color: #37332f;
  --text-main: #ffffff;
  --text-light: #e6e3df;
  --text-muted: #7d7770;
  --border-color: rgba(255, 255, 255, 0.05);
  --success-color: #499566;
  --success-bg: rgba(73, 149, 102, 0.1);
  --warning-color: #fca835;
  --error-color: #ff4757;
  --font-family: Inter, "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 15px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-xxl: 36px;
  --line-height-base: 1.5;
  --line-height-tight: 1.2;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 50px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0px 20px 40px rgba(0, 0, 0, 0.4);
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  margin: 0;
  padding: 0;
  line-height: var(--line-height-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@media (min-width: 768px) {
  .container {
    max-width: 600px;
    padding: var(--spacing-xxl) var(--spacing-xl);
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 800px;
  }
}

.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  background: rgba(21, 19, 17, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  z-index: 100;
}

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

.header-nav .header-logo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #292524;
  background-image: url('/logo.webp');
  background-size: cover;
  background-position: center;
}

.header-nav .header-title {
  font-weight: 600;
  font-size: 20px;
  color: var(--text-main);
}

.header-nav .header-menu-container {
  position: relative;
}

.header-nav .header-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background-color: var(--primary-color);
  cursor: pointer;
  transition: background-color 0.2s;
}

.header-nav .header-menu:hover {
  background-color: var(--primary-hover);
}

.header-nav .dropdown-menu {
  position: absolute;
  top: 50px;
  right: 0;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  width: 200px;
  display: none;
  flex-direction: column;
  overflow: hidden;
  z-index: 101;
  transform-origin: top right;
  animation: dropdownFadeIn 0.2s ease-out;
}

.header-nav .dropdown-menu.show {
  display: flex;
}

.header-nav .dropdown-menu .dropdown-item {
  padding: 14px 16px;
  color: var(--text-main);
  text-decoration: none;
  font-size: var(--font-size-base);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background-color 0.2s;
  border-bottom: 1px solid var(--border-color);
}

.header-nav .dropdown-menu .dropdown-item:last-child {
  border-bottom: none;
}

.header-nav .dropdown-menu .dropdown-item:hover {
  background-color: var(--panel-bg);
  color: var(--primary-color);
}

.header-nav .dropdown-menu .dropdown-item i {
  font-size: 18px;
  color: var(--primary-color);
}

@keyframes dropdownFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.page-header {
  text-align: center;
  width: 100%;
  margin-top: 60px;
  margin-bottom: var(--spacing-xl);
}

.page-header .main-title {
  color: var(--warning-color);
  font-size: var(--font-size-xxl);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
}

.page-header .subtitle {
  color: var(--text-light);
  font-size: var(--font-size-base);
  font-weight: 400;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  width: 100%;
  margin-bottom: var(--spacing-lg);
}

.input-section {
  width: 100%;
  margin-bottom: var(--spacing-lg);
}

.input-section .input-label {
  color: var(--text-main);
  display: block;
  text-align: center;
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.input-section .input-container {
  position: relative;
  width: 100%;
  background-color: var(--panel-bg);
  border-radius: var(--radius-xl);
  padding: 6px 16px;
  display: flex;
  align-items: center;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-section .input-container:focus-within {
  border-color: var(--primary-color);
}

.input-section .input-field {
  width: 100%;
  padding: 12px 30px 12px 0;
  background-color: transparent;
  border: none;
  color: var(--text-main);
  font-size: var(--font-size-base);
  outline: none;
}

.input-section .input-field::placeholder {
  color: var(--text-muted);
  font-weight: 500;
}

.input-section .toggle-password {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: var(--font-size-lg);
  padding: 5px;
  transition: color 0.2s;
}

.input-section .toggle-password:hover {
  color: var(--text-main);
}

.input-section .warning {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--error-color);
  margin-top: var(--spacing-md);
  font-size: var(--font-size-sm);
}

.input-section .warning.visible {
  display: flex;
}

.input-section .warning .warning-icon {
  font-size: var(--font-size-base);
}

.input-section .warning .warning-text {
  font-weight: 500;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  border-radius: var(--radius-xl);
  padding: 16px var(--spacing-lg);
  font-size: var(--font-size-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
  gap: 8px;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #e7dbce;
  box-shadow: 0px 8px 16px rgba(156, 113, 69, 0.2);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-outline {
  background-color: transparent;
  color: var(--text-main);
  border: 2px solid var(--border-color);
}

.btn-outline:hover {
  background-color: var(--panel-bg);
  border-color: var(--primary-color);
}

.btn-wechat {
  background-color: var(--success-color);
  color: #fff;
}

.btn-wechat:hover {
  background-color: #3b7b54;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(73, 149, 102, 0.2);
}

.btn-capsule {
  background-color: var(--secondary-color);
  color: var(--text-main);
  border-radius: var(--radius-pill);
  padding: 16px 24px;
  font-size: var(--font-size-base);
}

.btn-capsule:hover {
  background-color: #443f39;
  transform: translateY(-2px);
}

.divider {
  width: 100%;
  height: 1px;
  background-color: var(--border-color);
  margin: var(--spacing-lg) 0;
}

.dual-buttons {
  display: flex;
  justify-content: space-between;
  width: 100%;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.dual-buttons .dual-btn {
  flex: 1;
  text-align: center;
  padding: 14px 10px;
  font-size: var(--font-size-sm);
}

@media (min-width: 400px) {
  .dual-buttons .dual-btn {
    font-size: var(--font-size-base);
  }
}

.price-options {
  margin: var(--spacing-md) 0;
  width: 100%;
}

.price-option {
  border: 1px solid var(--border-color);
  background-color: var(--panel-bg);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  margin-bottom: var(--spacing-sm);
  cursor: pointer;
  transition: all 0.3s;
}

.price-option:hover {
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.price-option.selected {
  border-color: var(--primary-color);
  background-color: rgba(200, 158, 119, 0.1);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.price-option .price-option-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.price-option .option-name {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-main);
}

.price-option .option-price {
  font-size: var(--font-size-lg);
  font-weight: bold;
  color: var(--warning-color);
}

.price-option .option-desc {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  text-align: left;
}

.price-option .option-badge {
  background: linear-gradient(45deg, var(--primary-color), var(--primary-hover));
  color: #fff;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-top: 6px;
  display: inline-block;
  font-weight: bold;
}

.auto-shipment {
  background: var(--success-bg);
  border: 1px solid rgba(73, 149, 102, 0.3);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  margin: var(--spacing-md) 0;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--success-color);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.benefits-container {
  margin: var(--spacing-md) 0;
  background-color: var(--panel-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
}

.benefits-container .benefits-title {
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 10px;
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: 6px;
}

.benefits-container .benefits-list {
  list-style-type: none;
  padding-left: 0;
  margin-bottom: 0;
}

.benefits-container .benefits-list li {
  margin-bottom: 6px;
  color: var(--text-light);
  display: flex;
  align-items: flex-start;
  font-size: var(--font-size-xs);
  line-height: 1.4;
}

.benefits-container .benefits-list li i {
  color: var(--primary-color);
  margin-right: 6px;
  margin-top: 2px;
  flex-shrink: 0;
  font-size: 12px;
}

.tip-text {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  text-align: center;
  margin-top: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.product-showcase {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.product-showcase .product-image-container {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  background-color: #292524;
  border: 1px solid var(--border-color);
}

.product-showcase .product-image-container .product-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-showcase .product-info {
  text-align: center;
}

.product-showcase .product-info .product-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-main);
}

.footer-content {
  margin-top: auto;
  width: 100%;
  padding-bottom: var(--spacing-xl);
}