/* ============================================
   HKCSL 自定义金额充值 - 样式表
   风格参考：Apple / Alibaba / ByteDance / Tencent
   设计原则：克制、精致、专业、留白
   ============================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 品牌色 */
  --color-primary: #1677ff;
  --color-primary-hover: #4096ff;
  --color-primary-active: #0958d9;
  --color-primary-bg: #e6f4ff;
  --color-primary-border: #91caff;

  /* 功能色 */
  --color-success: #52c41a;
  --color-warning: #faad14;
  --color-error: #ff4d4f;
  --color-error-bg: #fff2f0;
  --color-error-border: #ffccc7;

  /* 中性色 */
  --color-title: #1d2129;
  --color-text: #4e5969;
  --color-text-secondary: #86909c;
  --color-placeholder: #c9cdd4;
  --color-border: #e5e6eb;
  --color-border-light: #f2f3f5;
  --color-bg: #f7f8fa;
  --color-bg-white: #ffffff;
  --color-bg-hover: #f2f3f5;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* 阴影 */
  --shadow-card: 0 1px 2px 0 rgba(0, 0, 0, 0.03), 0 1px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px 0 rgba(0, 0, 0, 0.02);
  --shadow-card-hover: 0 3px 6px -4px rgba(0, 0, 0, 0.12), 0 6px 16px 0 rgba(0, 0, 0, 0.08), 0 9px 28px 8px rgba(0, 0, 0, 0.05);
  --shadow-focus: 0 0 0 3px rgba(22, 119, 255, 0.12);

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
}

/* ---------- 重置与基础 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: var(--spacing-2xl) var(--spacing-md);
}

/* ---------- 页面容器 ---------- */
.page {
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ---------- 头部区域 ---------- */
.header-card {
  text-align: center;
}

.header__title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-title);
  line-height: 1.3;
}

.header__subtitle {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.4;
  margin-top: 4px;
}

/* ---------- 卡片容器 ---------- */
.card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-xl);
}

/* ---------- 公告栏 ---------- */
.notice {
  background: var(--color-primary-bg);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.notice__body {
  min-width: 0;
}

.notice__text {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary-active);
  line-height: 1.7;
}

.notice--tip {
  background: #fff7e6;
  border-color: #ffd591;
  margin-bottom: 0;
  margin-top: var(--spacing-sm);
}

.notice--tip .notice__text {
  color: #ad6800;
}

/* ---------- 表单 ---------- */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-title);
}

.form-label__required {
  color: var(--color-error);
  margin-left: 2px;
}

/* ---------- 输入框 ---------- */
.input-wrapper {
  position: relative;
}

.input-wrapper__prefix {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  pointer-events: none;
  user-select: none;
  z-index: 1;
  line-height: 1;
}

.input-field {
  width: 100%;
  height: 44px;
  padding: 0 14px 0 56px;
  font-size: 15px;
  font-family: var(--font-family);
  color: var(--color-title);
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-field::placeholder {
  color: var(--color-placeholder);
}

.input-field:hover {
  border-color: var(--color-primary-border);
}

.input-field:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.input-field--error {
  border-color: var(--color-error) !important;
  background-color: var(--color-error-bg);
}

.input-field--error:focus {
  box-shadow: 0 0 0 3px rgba(255, 77, 79, 0.12);
}

.form-hint {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ---------- 支付方式选择 ---------- */
.payment-group {
  display: flex;
  gap: var(--spacing-sm);
}

.payment-option {
  flex: 1;
}

.payment-option__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.payment-option__label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  height: 44px;
  padding: 0 var(--spacing-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  user-select: none;
}

.payment-option__label:hover {
  border-color: var(--color-primary-border);
  color: var(--color-primary);
}

.payment-option__input:checked + .payment-option__label {
  border-color: var(--color-primary);
  background-color: var(--color-primary-bg);
  color: var(--color-primary);
}

.payment-option__input:focus-visible + .payment-option__label {
  box-shadow: var(--shadow-focus);
}

.payment-option__icon {
  font-size: 16px;
}

/* ---------- 提交按钮 ---------- */
.submit-btn {
  width: 100%;
  height: 44px;
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font-family);
  color: #fff;
  background-color: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 0.2s;
  margin-top: var(--spacing-sm);
}

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

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

.submit-btn:focus-visible {
  box-shadow: var(--shadow-focus);
}

/* ---------- 底部链接卡片 ---------- */
.links-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.link-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  cursor: pointer;
  transition: background-color 0.15s;
  text-decoration: none;
  color: inherit;
}

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

.link-item + .link-item {
  border-top: 1px solid var(--color-border-light);
}

.link-item__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
}

.link-item__icon svg {
  width: 18px;
  height: 18px;
}

.link-item__icon--globe {
  background: #e6f4ff;
  color: var(--color-primary);
}

.link-item__icon--qq {
  background: #fff7e6;
  color: #fa8c16;
}

.link-item__body {
  flex: 1;
  min-width: 0;
}

.link-item__label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-title);
  line-height: 1.3;
}

.link-item__value {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.4;
  margin-top: 1px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.link-item__arrow {
  width: 16px;
  height: 16px;
  color: var(--color-placeholder);
  flex-shrink: 0;
}

.link-item__badge {
  font-size: 12px;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
  flex-shrink: 0;
  transition: all 0.15s;
}

.link-item:hover .link-item__badge {
  background: var(--color-primary);
  color: #fff;
}

/* ---------- 自定义确认对话框 ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}

.modal-overlay--visible {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card-hover);
  width: 320px;
  max-width: calc(100vw - 48px);
  padding: var(--spacing-lg);
  transform: scale(0.95);
  transition: transform 0.2s;
}

.modal-overlay--visible .modal {
  transform: scale(1);
}

.modal__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-title);
  margin-bottom: var(--spacing-sm);
}

.modal__content {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.modal__actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

.modal__btn {
  height: 36px;
  padding: 0 var(--spacing-md);
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-family);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid var(--color-border);
  background: var(--color-bg-white);
  color: var(--color-text);
}

.modal__btn:hover {
  border-color: var(--color-primary-border);
  color: var(--color-primary);
}

.modal__btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.modal__btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #fff;
}

/* ---------- 错误提示 ---------- */
.toast {
  position: fixed;
  top: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  color: var(--color-error);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-card);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  white-space: nowrap;
}

.toast--visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 480px) {
  body {
    padding: var(--spacing-md);
    align-items: flex-start;
  }

  .card {
    padding: var(--spacing-lg);
  }

  .header__title {
    font-size: 18px;
  }

  .link-item {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}