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

html,
body {
  min-height: 100%;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Montserrat", "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

body {
  display: flex;
  justify-content: center;
}

.page {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  overflow: hidden;
}

.page__bg {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
  pointer-events: none;
  user-select: none;
}

/* 图2 中间偏右黑色区域 —— 对齐图1表单边界（相对整图 %） */
.form-slot {
  position: absolute;
  left: 42.2%;
  top: 41.2%;
  width: 55.5%;
  height: 38.5%;
  z-index: 2;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
}

.register-form {
  position: relative;
  width: 100%;
  height: 100%;
  padding: 2.8% 4% 2.2%;
  border-radius: 8px;
  background: linear-gradient(
    165deg,
    rgba(7, 12, 24, 0.94) 0%,
    rgba(5, 9, 18, 0.97) 100%
  );
  border: 1px solid var(--color-form-border);
  box-shadow:
    0 0 0 1px rgba(255, 200, 80, 0.1),
    0 0 16px rgba(60, 140, 255, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.register-form__badge {
  position: absolute;
  top: -1%;
  right: 0;
  width: 32%;
  max-width: 88px;
  height: auto;
  z-index: 3;
  pointer-events: none;
  object-fit: contain;
  filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.45));
}

.register-form__head {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 3px;
  padding-right: 30%;
}

.register-form__gift {
  flex-shrink: 0;
  width: clamp(14px, 4.2vw, 18px);
  height: clamp(14px, 4.2vw, 18px);
  color: var(--color-gold-bright);
  filter: drop-shadow(0 0 3px rgba(255, 200, 60, 0.45));
}

.register-form__title {
  font-size: clamp(9px, 2.55vw, 12px);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.15;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.register-form__sub {
  font-size: clamp(7px, 1.85vw, 9px);
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 5%;
  line-height: 1.35;
  padding-right: 28%;
}

.register-form__sub strong {
  color: var(--color-gold-text);
  font-weight: 700;
}

.field {
  margin-bottom: 1.8%;
}

.field__box {
  position: relative;
  display: flex;
  align-items: center;
  height: clamp(20px, 5.6vw, 28px);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: 5px;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.field__box:focus-within {
  border-color: var(--color-border-focus);
  background: var(--color-bg-input-focus);
}

.field__icon {
  flex-shrink: 0;
  width: 12px;
  height: 12px;
  margin-left: 6px;
  color: var(--color-text-hint);
}

.field__input {
  flex: 1;
  min-width: 0;
  height: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--color-text);
  font-family: inherit;
  font-size: clamp(7px, 2vw, 10px);
  padding: 0 6px;
}

.field__input::placeholder {
  color: var(--color-text-hint);
}

/* Username：对齐设计稿 —— 更高、圆角更大、淡蓝描边发光、白图标 */
.field--username {
  margin-bottom: 2.4%;
}

.field--username .field__box {
  height: clamp(26px, 7.2vw, 34px);
  border-radius: 8px;
  background: #050914;
  border: 1px solid rgba(120, 190, 230, 0.55);
  box-shadow:
    0 0 0 1px rgba(80, 160, 220, 0.12),
    0 0 10px rgba(70, 160, 230, 0.28);
}

.field--username .field__box:focus-within {
  border-color: rgba(150, 210, 255, 0.85);
  box-shadow:
    0 0 0 1px rgba(120, 190, 240, 0.25),
    0 0 14px rgba(80, 180, 255, 0.4);
  background: #070c18;
}

.field--username .field__icon {
  width: clamp(13px, 3.6vw, 16px);
  height: clamp(13px, 3.6vw, 16px);
  margin-left: 8px;
  color: rgba(255, 255, 255, 0.92);
}

.field--username .field__input {
  font-size: clamp(8px, 2.2vw, 11px);
  padding: 0 8px;
}

.field--username .field__input::placeholder {
  color: rgba(170, 180, 195, 0.85);
}

.field--username .field__hint {
  margin-top: 4px;
  text-align: center;
  font-size: clamp(6px, 1.55vw, 8px);
  color: rgba(220, 225, 235, 0.9);
  padding-left: 0;
}

.field__action {
  flex-shrink: 0;
  height: calc(100% - 4px);
  margin-right: 2px;
  padding: 0 5px;
  border: 0;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--color-gold-bright), var(--color-gold-deep));
  color: var(--color-text-on-gold);
  font-family: inherit;
  font-size: clamp(5px, 1.45vw, 7px);
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  line-height: 1;
}

.field__action:disabled,
.field__action.is-counting {
  opacity: 1;
  cursor: not-allowed;
  background: linear-gradient(180deg, #6b7280, #4b5563);
  color: #e5e7eb;
  min-width: 2.4em;
  font-variant-numeric: tabular-nums;
}

.field__toggle {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 22px;
  height: 100%;
  margin-right: 2px;
  border: 0;
  background: transparent;
  color: var(--color-text-hint);
  cursor: pointer;
}

.field__toggle svg {
  width: 11px;
  height: 11px;
}

.field__hint {
  margin-top: 2px;
  font-size: clamp(5px, 1.4vw, 7px);
  color: var(--color-text-hint);
  line-height: 1.2;
  padding-left: 2px;
}

.field.is-error .field__box {
  border-color: var(--color-error);
}

.field.is-error .field__hint {
  color: var(--color-error);
}

.divider {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 2% 0 2.5%;
  color: var(--color-text-hint);
  font-size: clamp(6px, 1.6vw, 8px);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.register-form__submit {
  margin-top: auto;
  width: 100%;
  height: clamp(24px, 6.8vw, 32px);
  border: 0;
  border-radius: 6px;
  background: linear-gradient(180deg, #ffe566 0%, #ffc107 48%, #f0a800 100%);
  color: var(--color-text-on-gold);
  font-family: inherit;
  font-size: clamp(9px, 2.5vw, 12px);
  font-weight: 800;
  letter-spacing: 0.08em;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(255, 180, 0, 0.35);
  transition: filter 0.15s ease, transform 0.1s ease;
}

.register-form__submit:active {
  transform: scale(0.98);
  filter: brightness(0.95);
}

.register-form__footer {
  margin-top: 3%;
  text-align: center;
  font-size: clamp(6px, 1.7vw, 8px);
  color: var(--color-text-muted);
}

.register-form__footer a {
  color: var(--color-gold-text);
  font-weight: 700;
  text-decoration: none;
}

.register-form__footer a:hover {
  text-decoration: underline;
}

@media (max-width: 380px) {
  .field__action {
    padding: 0 3px;
    font-size: 5px;
  }
}

@media (min-width: 481px) {
  .page {
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.6);
  }
}