/* --- 全局变量和基础样式 --- */
:root {
  --primary-color: #007acc;
  --primary-color-hover: #006bb3;
  --background-color: #ffffff;
  --text-color: #212529;
  --text-muted: #6c757d;
  --card-bg: #f8f9fa;
  --border-color: #dee2e6;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  margin: 0;
  padding-top: 80px; /* 为固定的头部留出空间 */
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
}

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

/* --- 头部导航 --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 20px 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  box-sizing: border-box;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  cursor: pointer;
}

nav a {
  margin: 0 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}

nav a:hover {
  color: var(--text-color);
}

.auth-button {
  background-color: var(--primary-color);
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  transition: background-color 0.2s, transform 0.2s;
}

.auth-button:hover {
  background-color: var(--primary-color-hover);
  transform: scale(1.05);
}

.avatar {
  width: 40px;
  height: 40px;
  background-color: #e9ecef;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.2s;
}

.avatar:hover {
  transform: scale(1.1);
}

/* --- 用户头像悬浮菜单 --- */
.user-menu-wrapper {
  position: relative;
  display: inline-block;
}

.user-dropdown-menu {
  position: absolute;
  top: 55px;
  right: 0;
  width: 240px;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  z-index: 200;
  overflow: hidden;
}

.user-menu-wrapper:hover .user-dropdown-menu,
.user-dropdown-menu:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-info-section {
  padding: 16px;
  background-color: var(--card-bg);
}

.user-email {
  font-size: 0.9rem;
  color: var(--text-color);
  font-weight: 600;
  margin-bottom: 8px;
  word-break: break-all;
}

.user-badge {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--primary-color);
  background-color: rgba(0, 122, 204, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 600;
}

.user-badge.pro {
  color: #ffa500;
  background-color: rgba(255, 165, 0, 0.1);
}

.menu-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 0;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  width: 100%;
  border: none;
  background: none;
  color: var(--text-color);
  font-size: 0.95rem;
  cursor: pointer;
  transition: background-color 0.2s;
  text-decoration: none;
  font-family: inherit;
}

.menu-item:hover {
  background-color: var(--card-bg);
}

.menu-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.menu-icon svg {
  width: 20px;
  height: 20px;
  transition: opacity 0.2s;
}

/* --- 通用容器样式 --- */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 80px 20px;
  text-align: center;
}

/* --- 主页 Hero 区 --- */
.hero {
  text-align: center;
}
.hero h1 {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 30px auto;
}
.hero .hero-description {
  line-height: 1.8;
  text-align: center;
}

/* --- 功能展示区 --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: left;
  margin-top: 60px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 25px;
}
.feature-card h3 {
  margin-top: 0;
  font-size: 1.1rem;
}
.feature-card p {
  font-size: 0.9rem;
  line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 1200px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* --- 定价页 --- */
.pricing-table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  max-width: 800px;
  margin: 40px auto;
}
.pricing-card {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 30px;
  text-align: left;
}
.pricing-card.recommended {
  border-color: var(--primary-color);
  border-width: 2px;
}
.pricing-card ul {
  list-style: none;
  padding: 0;
}
.pricing-card ul li {
  margin-bottom: 10px;
  padding-left: 25px;
  position: relative;
}
.pricing-card ul li::before {
  content: "✔";
  color: var(--primary-color);
  position: absolute;
  left: 0;
}

/* --- 模态框样式 --- */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}
.modal-content {
  background-color: var(--background-color);
  padding: 30px;
  border-radius: 16px;
  width: 90%;
  max-width: 400px;
  position: relative;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}
.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}
.modal-content h2 {
  margin-top: 0;
  color: var(--text-color);
}
.auth-method-button {
  display: block;
  width: 100%;
  padding: 12px;
  margin-bottom: 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--card-bg);
  color: var(--text-color);
  font-size: 1rem;
  cursor: pointer;
  text-align: left;
}
.form-group input {
  width: 100%;
  padding: 12px;
  box-sizing: border-box;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: #fff;
  color: var(--text-color);
  font-size: 1rem;
  margin-bottom: 10px;
}
.form-group {
  position: relative;
}
.get-code-button {
  position: absolute;
  right: 10px;
  top: 9px;
  background: none;
  border: none;
  color: var(--primary-color);
  cursor: pointer;
  font-size: 0.9rem;
}
.submit-button {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background-color: var(--primary-color);
  color: white;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
}
.switch-auth-mode {
  margin-top: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.switch-auth-mode a {
  color: var(--primary-color);
  cursor: pointer;
}

/* --- 账户页面样式 (全新设计) --- */
.account-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
}
.account-card {
  background-color: #fff;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 20px;
}
.account-card-header {
  padding: 20px 25px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.account-card-header h3 {
  margin: 0;
  font-size: 1.2rem;
}
.account-card-body {
  padding: 10px 25px;
}
.account-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
}
.account-card-body .account-row:last-child {
  border-bottom: none;
}
.account-row-label {
  color: var(--text-muted);
}
.account-row-value {
  display: flex;
  align-items: center;
  gap: 15px;
  font-weight: 500;
}
.account-row-value .tag {
  background-color: #e9ecef;
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
}
.action-button {
  background: #fff;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 6px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: background-color 0.2s;
}
.action-button:hover {
  background-color: var(--card-bg);
}
.action-button.primary {
  border-color: var(--primary-color);
  color: var(--primary-color);
}
.action-button.danger {
  border-color: #dc3545;
  color: #dc3545;
}
.toggle-switch {
  width: 44px;
  height: 24px;
  background-color: #ccc;
  border-radius: 12px;
  position: relative;
  cursor: pointer;
  transition: background-color 0.2s;
}
.toggle-switch.active {
  background-color: var(--primary-color);
}
.toggle-switch-handle {
  width: 20px;
  height: 20px;
  background-color: white;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.2s;
}
.toggle-switch.active .toggle-switch-handle {
  transform: translateX(20px);
}

/* --- 消息提示样式 --- */
.message-box {
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 15px;
  font-size: 0.9rem;
  display: none;
}
.message-box.show {
  display: block;
}
.message-box.error {
  background-color: #fee;
  color: #c33;
  border: 1px solid #fcc;
}
.message-box.success {
  background-color: #efe;
  color: #3c3;
  border: 1px solid #cfc;
}

/* --- 辅助样式 --- */
.hidden {
  display: none !important;
}

/* --- 页脚 --- */
footer {
  border-top: 1px solid var(--border-color);
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}