.page-contact {
  --contact-accent: var(--brand-accent, #FF6B35);
  --contact-bg: var(--primary-background, #0D0D0D);
  --contact-card-bg: var(--card-background, rgba(26, 26, 46, 0.85));
  --contact-text: var(--primary-text, #FFFFFF);
  --contact-muted: rgba(255, 255, 255, 0.6);
  --contact-glow: 0 8px 32px rgba(255, 107, 53, 0.25);
  --contact-radius: 6px;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  background: var(--contact-bg);
  color: var(--contact-text);
  font-family: var(--body-font, 'Inter', sans-serif);
}

/* ── 面包屑 ── */
.contact-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--body-scale-2, 14px);
  color: var(--contact-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.contact-breadcrumb a {
  color: var(--contact-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.contact-breadcrumb a:hover,
.contact-breadcrumb a:focus-visible {
  color: var(--contact-accent);
  border-bottom-color: var(--contact-accent);
}
.contact-breadcrumb__sep {
  color: var(--contact-muted);
  user-select: none;
}
.contact-breadcrumb [aria-current="page"] {
  color: var(--contact-text);
  font-weight: 500;
}

/* ── 分屏容器 ── */
.contact-hero {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: auto;
  position: relative;
}

/* 左侧信息区 */
.contact-hero__left {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 48px 24px 40px;
  background: var(--contact-bg);
  position: relative;
  z-index: 2;
}
.contact-title {
  font-family: var(--heading-font, 'Montserrat', sans-serif);
  font-weight: 900;
  font-size: clamp(32px, 8vw, 56px);
  line-height: 1.08;
  color: var(--contact-text);
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  position: relative;
}
.contact-title::before {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  background: var(--contact-accent);
  margin-bottom: 20px;
  border-radius: 2px;
}
.contact-desc {
  font-size: var(--body-scale-1, 16px);
  line-height: 1.7;
  color: var(--contact-muted);
  max-width: 480px;
  margin: 0 0 36px;
}

/* 联系列表 */
.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}
.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  background: var(--contact-card-bg);
  border-left: 4px solid var(--contact-accent);
  border-radius: 0 var(--contact-radius) var(--contact-radius) 0;
  transition: transform 0.25s, box-shadow 0.25s;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}
.contact-item:hover {
  transform: translateX(4px);
  box-shadow: var(--contact-glow);
}
.contact-item__label {
  font-family: var(--heading-font, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: var(--body-scale-2, 14px);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--contact-accent);
}
.contact-item__value {
  font-size: var(--body-scale-1, 16px);
  line-height: 1.5;
  color: var(--contact-text);
  word-break: break-word;
}
.contact-item__link {
  color: var(--contact-text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.contact-item__link:hover,
.contact-item__link:focus-visible {
  color: var(--contact-accent);
  border-bottom-color: var(--contact-accent);
}

/* 额外说明 */
.contact-extra {
  font-size: var(--body-scale-2, 14px);
  color: var(--contact-muted);
  margin: 8px 0 28px;
  padding: 12px 16px;
  background: rgba(0, 78, 124, 0.2);
  border-left: 2px solid var(--secondary-accent, #004E7C);
  border-radius: 0 var(--contact-radius) var(--contact-radius) 0;
}
.contact-extra .contact-item__link {
  color: var(--contact-accent);
}
.contact-extra .contact-item__link:hover {
  color: var(--data-highlight, #00FF87);
  border-bottom-color: var(--data-highlight, #00FF87);
}

/* 底部按钮 */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}
.contact-links__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--heading-font, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: var(--body-scale-2, 14px);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--contact-bg);
  background: var(--contact-accent);
  border: 2px solid var(--contact-accent);
  border-radius: var(--contact-radius);
  text-decoration: none;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s, color 0.25s;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.25);
  cursor: pointer;
}
.contact-links__btn:hover,
.contact-links__btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 107, 53, 0.4);
}
.contact-links__btn--outline {
  background: transparent;
  color: var(--contact-accent);
  box-shadow: none;
}
.contact-links__btn--outline:hover,
.contact-links__btn--outline:focus-visible {
  background: var(--contact-accent);
  color: var(--contact-bg);
  box-shadow: 0 8px 28px rgba(255, 107, 53, 0.3);
}

/* ── 右侧视觉区 ── */
.contact-hero__right {
  position: relative;
  width: 100%;
  min-height: 360px;
  overflow: hidden;
  background: linear-gradient(135deg, #0D0D0D 0%, #1A1A2E 100%);
  z-index: 1;
}
.contact-visual__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
  mix-blend-mode: luminosity;
}
.contact-visual__shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.contact-shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.5;
}
.contact-shape--1 {
  width: 140%;
  height: 140%;
  top: -20%;
  right: -40%;
  background: radial-gradient(circle at 30% 40%, rgba(255, 107, 53, 0.25) 0%, transparent 70%);
  animation: contactFloat 12s ease-in-out infinite alternate;
}
.contact-shape--2 {
  width: 600px;
  height: 600px;
  bottom: -180px;
  left: -120px;
  background: radial-gradient(circle at 60% 50%, rgba(0, 78, 124, 0.3) 0%, transparent 60%);
  animation: contactFloat 16s ease-in-out infinite alternate-reverse;
}
.contact-shape--3 {
  width: 300px;
  height: 300px;
  top: 20%;
  right: 15%;
  border: 2px solid rgba(255, 107, 53, 0.15);
  background: transparent;
  transform: rotate(45deg);
  border-radius: 0;
  opacity: 0.6;
  animation: contactRotate 20s linear infinite;
}
.contact-shape--4 {
  width: 180px;
  height: 180px;
  bottom: 25%;
  right: 30%;
  background: radial-gradient(circle, rgba(0, 255, 135, 0.12) 0%, transparent 70%);
  animation: contactPulse 4s ease-in-out infinite alternate;
}
.contact-shape--5 {
  width: 80px;
  height: 80px;
  top: 15%;
  left: 25%;
  border: 2px solid rgba(0, 255, 135, 0.2);
  background: transparent;
  transform: rotate(30deg) skewX(-10deg);
  border-radius: 0;
  opacity: 0.5;
  animation: contactRotate 25s linear infinite reverse;
}
.contact-shape--6 {
  width: 2px;
  height: 200px;
  top: 10%;
  right: 8%;
  background: linear-gradient(to bottom, transparent, var(--contact-accent), transparent);
  transform: rotate(-25deg);
  opacity: 0.25;
  animation: contactSlide 6s ease-in-out infinite alternate;
}
@keyframes contactFloat {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(30px, -20px) scale(1.05); }
}
@keyframes contactRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
@keyframes contactPulse {
  0% { transform: scale(0.9); opacity: 0.3; }
  100% { transform: scale(1.3); opacity: 0.7; }
}
@keyframes contactSlide {
  0% { transform: translateY(0) rotate(-25deg); opacity: 0.15; }
  100% { transform: translateY(-40px) rotate(-25deg); opacity: 0.35; }
}

/* ── 表单区域 ── */
.contact-form {
  width: 100%;
  padding: 64px 24px 80px;
  background: linear-gradient(180deg, #0D0D0D 0%, #111122 100%);
  position: relative;
}
.contact-form::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--contact-accent), var(--data-highlight, #00FF87), var(--contact-accent));
  opacity: 0.6;
}
.contact-form__inner {
  max-width: 720px;
  margin: 0 auto;
}
.contact-form__header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 40px;
}
.contact-form__decor {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 16px;
  border: 2px solid var(--contact-accent);
  box-shadow: 0 0 24px rgba(255, 107, 53, 0.15);
}
.contact-form__title {
  font-family: var(--heading-font, 'Montserrat', sans-serif);
  font-weight: 900;
  font-size: clamp(28px, 6vw, 40px);
  line-height: 1.15;
  color: var(--contact-text);
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.contact-form__desc {
  font-size: var(--body-scale-1, 16px);
  color: var(--contact-muted);
  margin: 0;
  max-width: 480px;
}

/* 表单包装器 (用于:target切换) */
.contact-form__wrapper {
  position: relative;
}

/* 表单体 */
.contact-form__body {
  transition: opacity 0.3s;
}
#thank-you:target ~ #form-body {
  display: none;
}

/* 表单 */
.contact-form__form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group--full {
  grid-column: 1 / -1;
}
.form-group--submit {
  grid-column: 1 / -1;
  align-items: flex-start;
  padding-top: 8px;
}
.form-label {
  font-family: var(--heading-font, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: var(--body-scale-2, 14px);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--contact-accent);
}
.form-input,
.form-textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 2px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--contact-radius);
  color: var(--contact-text);
  font-family: var(--body-font, 'Inter', sans-serif);
  font-size: var(--body-scale-1, 16px);
  line-height: 1.5;
  transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
  outline: none;
  box-sizing: border-box;
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: rgba(255, 255, 255, 0.3);
}
.form-input:focus,
.form-textarea:focus {
  border-color: var(--contact-accent);
  background: rgba(255, 107, 53, 0.06);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.12);
}
.form-input:hover,
.form-textarea:hover {
  border-color: rgba(255, 107, 53, 0.3);
}
.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* 提交按钮 (a标签) */
.form-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 44px;
  font-family: var(--heading-font, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: var(--body-scale-1, 16px);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--contact-bg);
  background: var(--contact-accent);
  border: 2px solid var(--contact-accent);
  border-radius: var(--contact-radius);
  text-decoration: none;
  transition: transform 0.25s, box-shadow 0.3s, background 0.25s;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.2);
  cursor: pointer;
  user-select: none;
}
.form-submit:hover,
.form-submit:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(255, 107, 53, 0.45);
  background: #ff7a3d;
}
.form-submit:active {
  transform: translateY(0);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.2);
}

/* ── 感谢信息 ── */
.contact-form__thank-you {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 48px 24px;
  background: var(--contact-card-bg);
  border: 2px solid var(--data-highlight, #00FF87);
  border-radius: var(--contact-radius);
  box-shadow: 0 8px 32px rgba(0, 255, 135, 0.1);
}
#thank-you:target {
  display: flex;
}
.thank-you__icon {
  margin-bottom: 20px;
  animation: thankYouBounce 0.6s ease-out;
}
.thank-you__icon svg {
  display: block;
  width: 64px;
  height: 64px;
}
.thank-you__title {
  font-family: var(--heading-font, 'Montserrat', sans-serif);
  font-weight: 900;
  font-size: var(--heading-scale-3, 36px);
  color: var(--data-highlight, #00FF87);
  margin: 0 0 12px;
}
.thank-you__text {
  font-size: var(--body-scale-1, 16px);
  color: var(--contact-muted);
  max-width: 400px;
  margin: 0 0 32px;
  line-height: 1.6;
}
.thank-you__back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  font-family: var(--heading-font, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: var(--body-scale-2, 14px);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--contact-bg);
  background: var(--data-highlight, #00FF87);
  border: 2px solid var(--data-highlight, #00FF87);
  border-radius: var(--contact-radius);
  text-decoration: none;
  transition: transform 0.25s, box-shadow 0.25s;
  box-shadow: 0 4px 20px rgba(0, 255, 135, 0.25);
}
.thank-you__back:hover,
.thank-you__back:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 255, 135, 0.4);
}
@keyframes thankYouBounce {
  0% { transform: scale(0.6); opacity: 0; }
  50% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); }
}

/* ── 桌面端媒体查询 ── */
@media (min-width: 768px) {
  .contact-hero {
    flex-direction: row;
    min-height: 100vh;
    max-height: 1080px;
  }
  .contact-hero__left {
    flex: 0 0 50%;
    max-width: 50%;
    padding: 80px 40px 60px 60px;
    justify-content: center;
  }
  .contact-hero__right {
    flex: 0 0 50%;
    max-width: 50%;
    min-height: 100%;
  }
  .contact-title {
    font-size: clamp(40px, 5vw, 64px);
  }
  .contact-title::before {
    width: 64px;
    height: 5px;
    margin-bottom: 28px;
  }
  .contact-desc {
    font-size: 18px;
    margin-bottom: 44px;
  }
  .contact-details {
    gap: 16px;
  }
  .contact-item {
    padding: 18px 24px;
  }
  .contact-extra {
    margin: 12px 0 32px;
  }
  .contact-links {
    gap: 16px;
  }
  .contact-links__btn {
    padding: 14px 32px;
    font-size: var(--body-scale-1, 16px);
  }
  .contact-form {
    padding: 80px 40px 100px;
  }
  .contact-form__inner {
    max-width: 800px;
  }
  .contact-form__form {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .form-group--full {
    grid-column: 1 / -1;
  }
  .form-group--submit {
    grid-column: 1 / -1;
  }
  .form-input,
  .form-textarea {
    padding: 16px 20px;
  }
  .form-submit {
    padding: 18px 52px;
    font-size: 18px;
  }
  .contact-form__decor {
    width: 100px;
    height: 100px;
  }
  .contact-shape--1 {
    width: 120%;
    height: 120%;
    top: -10%;
    right: -30%;
  }
  .contact-shape--2 {
    width: 800px;
    height: 800px;
    bottom: -240px;
    left: -160px;
  }
  .contact-shape--3 {
    width: 400px;
    height: 400px;
    top: 15%;
    right: 10%;
  }
  .contact-shape--4 {
    width: 240px;
    height: 240px;
    bottom: 20%;
    right: 25%;
  }
  .contact-shape--5 {
    width: 120px;
    height: 120px;
    top: 20%;
    left: 20%;
  }
  .contact-shape--6 {
    height: 300px;
    top: 8%;
    right: 6%;
  }
}

@media (min-width: 1200px) {
  .contact-hero__left {
    padding: 100px 60px 80px 80px;
  }
  .contact-form {
    padding: 100px 40px 120px;
  }
  .contact-form__inner {
    max-width: 880px;
  }
}

/* ── 极窄屏保护 ── */
@media (max-width: 420px) {
  .contact-hero__left {
    padding: 32px 16px 28px;
  }
  .contact-item {
    padding: 12px 14px;
  }
  .contact-links__btn {
    padding: 10px 20px;
    font-size: var(--body-scale-3, 12px);
  }
  .contact-form {
    padding: 40px 16px 60px;
  }
  .contact-form__title {
    font-size: 24px;
  }
  .form-input,
  .form-textarea {
    padding: 12px 14px;
    font-size: var(--body-scale-2, 14px);
  }
  .form-submit {
    padding: 14px 32px;
    font-size: var(--body-scale-2, 14px);
  }
}