.page-contact {
  --panel-form-bg: #16233b;
  --contact-gutter: clamp(1rem, 2vw, 2.25rem);
  position: relative;
  padding: clamp(1.25rem, 3vw, 2.5rem) 0 clamp(2.5rem, 5vw, 4rem);
}

/* ===== 分屏外壳 ===== */
.page-contact .contact-shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

/* ===== 左侧沟通通道 ===== */
.page-contact .contact-channels {
  position: relative;
  isolation: isolate;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  padding: var(--contact-gutter);
}

.page-contact .channels-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
}

.page-contact .contact-channels::before {
  content: '探索未知 竞技无界';
  position: absolute;
  top: 16%;
  right: -0.5rem;
  z-index: 0;
  writing-mode: vertical-rl;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  letter-spacing: 0.45em;
  color: rgba(255, 255, 255, 0.06);
  white-space: nowrap;
  pointer-events: none;
}

.page-contact .channels-inner {
  position: relative;
  z-index: 1;
}

.page-contact .breadcrumb {
  margin-bottom: 1.75rem;
}

.page-contact .channels-head {
  margin-bottom: 1.75rem;
}

.page-contact .channels-kicker {
  margin-bottom: 0.35rem;
  font-family: var(--font-accent);
  font-size: 0.75rem;
  letter-spacing: 0.4em;
  color: var(--color-gold);
}

.page-contact .channels-head h1 {
  margin-bottom: 0.75rem;
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 4vw, 3rem);
  line-height: 1.1;
  color: var(--color-white);
  text-shadow: 0 0 14px rgba(123, 47, 255, 0.55);
}

.page-contact .channels-desc {
  max-width: 34ch;
  color: var(--color-silver);
}

/* ===== 渠道卡片列表 ===== */
.page-contact .channel-list {
  display: grid;
  gap: 0.875rem;
}

.page-contact .channel-item {
  display: flex;
  gap: 0.875rem;
  align-items: flex-start;
  padding: 1.125rem;
  background: rgba(13, 27, 42, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-contact .channel-item:hover {
  border-color: rgba(245, 197, 66, 0.55);
  transform: translateY(-2px);
}

.page-contact .channel-item__icon {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(123, 47, 255, 0.32), rgba(245, 197, 66, 0.14));
  border: 1px solid rgba(123, 47, 255, 0.4);
  color: var(--color-gold);
  transition: box-shadow 0.3s ease, color 0.3s ease;
}

.page-contact .channel-item:hover .channel-item__icon {
  color: var(--color-white);
  box-shadow: 0 0 16px rgba(123, 47, 255, 0.5);
}

.page-contact .channel-item__icon svg {
  width: 24px;
  height: 24px;
}

.page-contact .channel-item__body h2 {
  margin-bottom: 0.3rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-white);
}

.page-contact .channel-item__value {
  font-family: var(--font-accent);
  font-size: 0.9375rem;
  letter-spacing: 0.03em;
  color: var(--color-gold);
  word-break: break-all;
}

.page-contact .channel-item__value a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dashed rgba(245, 197, 66, 0.45);
  transition: border-color 0.3s ease;
}

.page-contact .channel-item__value a:hover {
  border-bottom-color: var(--color-gold);
}

.page-contact .channel-item__usage {
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  color: var(--color-silver);
}

/* ===== 回复承诺 ===== */
.page-contact .commit-card {
  margin-top: 1.125rem;
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 1rem 1.125rem;
  border-radius: var(--radius);
  background: linear-gradient(90deg, rgba(245, 197, 66, 0.13), rgba(123, 47, 255, 0.08));
  border: 1px solid rgba(245, 197, 66, 0.22);
}

.page-contact .commit-card__icon {
  flex: 0 0 auto;
  color: var(--color-gold);
}

.page-contact .commit-card__icon svg {
  width: 24px;
  height: 24px;
}

.page-contact .commit-card__text strong {
  display: block;
  font-size: 0.9375rem;
  color: var(--color-white);
}

.page-contact .commit-card__text p {
  margin-top: 0.2rem;
  font-size: 0.8125rem;
  color: var(--color-silver);
  line-height: 1.5;
}

/* ===== 右侧咨询表单 ===== */
.page-contact .contact-form-panel {
  position: relative;
  background: linear-gradient(150deg, var(--panel-form-bg) 0%, var(--color-bg-deep) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--contact-gutter);
  overflow: hidden;
}

.page-contact .panel-envelope {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: clamp(84px, 14vw, 120px);
  height: clamp(63px, 10.5vw, 90px);
  object-fit: contain;
  opacity: 0.16;
  pointer-events: none;
  z-index: 0;
}

.page-contact .panel-head,
.page-contact .consult-form,
.page-contact .form-success {
  position: relative;
  z-index: 1;
}

.page-contact .panel-head {
  margin-bottom: 1.75rem;
}

.page-contact .panel-kicker {
  margin-bottom: 0.35rem;
  font-family: var(--font-accent);
  font-size: 0.75rem;
  letter-spacing: 0.4em;
  color: var(--color-purple);
}

.page-contact .panel-head h2 {
  margin-bottom: 0.5rem;
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  color: var(--color-white);
}

.page-contact .panel-desc {
  color: var(--color-silver);
  font-size: 0.9375rem;
}

/* ===== 表单字段 ===== */
.page-contact .consult-form {
  display: grid;
  gap: 1.25rem;
}

.page-contact .form-field {
  position: relative;
}

.page-contact .form-field label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.875rem;
  color: var(--color-white);
}

.page-contact .form-field input,
.page-contact .form-field select,
.page-contact .form-field textarea {
  width: 100%;
  padding: 0.7rem 0;
  background: transparent;
  border: 0;
  border-bottom: 2px solid rgba(245, 197, 66, 0.35);
  border-radius: 0;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-contact .form-field select {
  -webkit-appearance: none;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--color-purple) 50%),
    linear-gradient(135deg, var(--color-purple) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  cursor: pointer;
}

.page-contact .form-field select option {
  background: var(--color-bg);
}

.page-contact .form-field textarea {
  resize: vertical;
  min-height: 88px;
}

.page-contact .form-field input:focus,
.page-contact .form-field select:focus,
.page-contact .form-field textarea:focus {
  outline: none;
  border-bottom-color: var(--color-purple);
  box-shadow: 0 4px 14px -8px rgba(123, 47, 255, 0.7);
}

.page-contact .form-field input::placeholder,
.page-contact .form-field textarea::placeholder {
  color: rgba(192, 200, 208, 0.45);
}

.page-contact .form-field input:valid:not(:placeholder-shown),
.page-contact .form-field textarea:valid:not(:placeholder-shown) {
  border-bottom-color: rgba(57, 255, 136, 0.45);
}

.page-contact .form-field input:invalid:not(:placeholder-shown),
.page-contact .form-field textarea:invalid:not(:placeholder-shown) {
  border-bottom-color: var(--color-amber);
}

.page-contact .form-error {
  margin-top: 0.3rem;
  font-size: 0.8125rem;
  color: var(--color-amber);
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.page-contact .form-field input:invalid:not(:placeholder-shown) ~ .form-error,
.page-contact .form-field textarea:invalid:not(:placeholder-shown) ~ .form-error {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 提交按钮 ===== */
.page-contact .form-send {
  width: 100%;
  padding: 0.9rem 1.25rem;
  font-size: 1rem;
  letter-spacing: 0.08em;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 0 22px rgba(57, 255, 136, 0.18);
  transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.page-contact .form-send:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(57, 255, 136, 0.3);
}

.page-contact .form-note {
  font-size: 0.8125rem;
  color: var(--color-silver);
  text-align: center;
  line-height: 1.6;
}

/* ===== 成功信息 ===== */
.page-contact .form-success {
  margin-top: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1.125rem;
  border-radius: var(--radius);
  border: 1px solid rgba(57, 255, 136, 0.4);
  background: rgba(57, 255, 136, 0.07);
}

.page-contact .form-success[hidden] {
  display: none;
}

.page-contact .form-success__icon {
  flex: 0 0 auto;
  color: var(--color-cta);
}

.page-contact .form-success__icon svg {
  width: 22px;
  height: 22px;
}

.page-contact .form-success strong {
  color: var(--color-white);
}

.page-contact .form-success p {
  margin-top: 0.2rem;
  font-size: 0.875rem;
  color: var(--color-silver);
}

/* ===== 底部相关导航 ===== */
.page-contact .contact-sitemap {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.page-contact .contact-sitemap__label {
  margin-bottom: 0.75rem;
  font-size: 0.8125rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-silver);
}

.page-contact .contact-sitemap__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}

.page-contact .contact-sitemap__link {
  color: var(--color-white);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.page-contact .contact-sitemap__link:hover {
  color: var(--color-gold);
}

.page-contact .contact-sitemap__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-purple);
}

/* ===== 桌面端分屏 ===== */
@media (min-width: 1024px) {
  .page-contact .contact-shell {
    grid-template-columns: 5fr 7fr;
    gap: 0;
    border: 1px solid var(--color-border);
    border-radius: 22px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
  }

  .page-contact .contact-channels,
  .page-contact .contact-form-panel {
    border: 0;
    border-radius: 0;
  }

  .page-contact .contact-channels {
    border-right: 1px solid var(--color-border);
  }

  .page-contact .contact-shell::after {
    content: '';
    position: absolute;
    top: -10%;
    left: 41.5%;
    width: 2px;
    height: 120%;
    background: linear-gradient(180deg,
      rgba(123, 47, 255, 0) 0%,
      rgba(123, 47, 255, 0.55) 30%,
      rgba(245, 197, 66, 0.65) 70%,
      rgba(245, 197, 66, 0) 100%);
    transform: rotate(20deg);
    box-shadow: 0 0 14px rgba(123, 47, 255, 0.45);
    z-index: 3;
    pointer-events: none;
  }

  .page-contact .contact-form-panel {
    padding: clamp(1.75rem, 3vw, 2.5rem);
  }

  .page-contact .channel-item {
    padding: 1.25rem;
  }

  .page-contact .contact-sitemap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }

  .page-contact .contact-sitemap__label {
    margin-bottom: 0;
  }
}