/* ==============================================
   MUTBOT — Contact Page Styles
   ============================================== */

/* ==================== HERO ==================== */
.hero {
  height: 40vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
  padding-top: calc(var(--nav-height) + 2rem);
  background: linear-gradient(
    135deg,
    rgba(0, 122, 255, 0.05) 0%,
    rgba(0, 122, 255, 0.02) 100%
  );
}

.hero h1 {
  font-size: clamp(2rem, 8vw, 3.5rem);
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-2);
  max-width: 600px;
}

/* ==================== SECTIONS ==================== */
.page-section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.page-section h2 {
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  margin-bottom: 3rem;
  text-align: center;
}

/* ==================== CONTACT LAYOUT ==================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

/* ==================== FORM ==================== */
.contact-form .form-group {
  margin-bottom: 1.5rem;
}

.contact-form label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 0.75rem;
  background: #f5f5f7;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: all 0.3s;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: #999;
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--accent);
  background: #eaf3ff;
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.contact-form textarea {
  resize: vertical;
  min-height: 150px;
}

.form-submit {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 1rem;
  font-family: var(--font);
  width: 100%;
  margin-top: 1rem;
}

.form-submit:hover {
  background: var(--accent-dark);
}

.form-message {
  padding: 1rem;
  border-radius: var(--radius);
  margin-top: 1rem;
  display: none;
  text-align: center;
  font-weight: 500;
}

.form-message.form-message-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  /* 深绿替代 #22c55e：浅绿底上对比度需 ≥4.5:1（WCAG AA） */
  color: #15803d;
  display: block;
}

.form-message.form-message-error {
  background: rgba(255, 59, 48, 0.1);
  border: 1px solid rgba(255, 59, 48, 0.3);
  /* 深红替代 #ff3b30：浅红底上对比度需 ≥4.5:1（WCAG AA） */
  color: #c81e1e;
  display: block;
}

/* ==================== CONTACT INFO ==================== */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-card h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--accent);
}

.contact-card p {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.6;
}

.contact-card a {
  color: var(--accent);
  transition: color 0.3s;
}

.contact-card a:hover {
  color: var(--accent-dark);
}

/* ==================== FAQ ==================== */
.faq-shell {
  padding: clamp(2rem, 4vw, 3rem);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 32px;
  background:
    radial-gradient(
      circle at top right,
      rgba(0, 122, 255, 0.08),
      transparent 30%
    ),
    linear-gradient(
      180deg,
      rgba(250, 251, 255, 0.96),
      rgba(255, 255, 255, 0.98)
    );
  box-shadow: 0 24px 80px rgba(16, 24, 40, 0.06);
}

.faq-header {
  max-width: 860px;
  margin: 0 auto 2.5rem;
  text-align: center;
}

.faq-eyebrow {
  margin-bottom: 0.85rem;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.faq-intro {
  max-width: 760px;
  margin: 0 auto;
  color: var(--text-2);
  font-size: 1rem;
  line-height: 1.8;
}

.faq-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.faq-summary-item {
  padding: 1rem 1.1rem;
  border: 1px solid rgba(0, 122, 255, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  text-align: left;
  backdrop-filter: blur(8px);
}

.faq-summary-label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--text-2);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.faq-summary-value {
  display: block;
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
}

.faq-container {
  max-width: 920px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 1rem;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.03);
  overflow: hidden;
  transition:
    border-color 0.3s,
    box-shadow 0.3s,
    transform 0.3s;
}

.faq-item:last-child {
  margin-bottom: 0;
}

.faq-item:hover {
  border-color: rgba(0, 122, 255, 0.24);
  box-shadow: 0 16px 40px rgba(0, 122, 255, 0.08);
}

.faq-item.expanded {
  border-color: rgba(0, 122, 255, 0.26);
  box-shadow: 0 20px 50px rgba(0, 122, 255, 0.1);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.35rem 1.5rem;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  font-family: var(--font);
  cursor: pointer;
  transition: color 0.3s;
}

.faq-question:hover,
.faq-question:focus-visible {
  color: var(--accent);
}

.faq-question:focus-visible {
  outline: 3px solid rgba(0, 122, 255, 0.18);
  outline-offset: -3px;
}

.faq-question-text {
  max-width: 680px;
  line-height: 1.45;
}

.faq-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 50%;
  border: 1px solid rgba(0, 122, 255, 0.14);
  background: rgba(0, 122, 255, 0.06);
  transition: all 0.3s;
}

.faq-icon svg {
  width: 18px;
  height: 18px;
  color: var(--text-2);
  transition: transform 0.3s;
}

.faq-item.expanded .faq-icon {
  background: rgba(0, 122, 255, 0.1);
}

.faq-item.expanded .faq-icon svg {
  transform: rotate(45deg);
  color: var(--accent);
}

.faq-answer {
  overflow: hidden;
}

.faq-answer[hidden] {
  display: none;
}

.faq-answer-inner {
  padding: 0 1.5rem 1.45rem;
}

.faq-answer p {
  max-width: 720px;
  color: var(--text-2);
  font-size: 0.98rem;
  line-height: 1.8;
  padding-bottom: 1rem;
}

.faq-answer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 600;
}

.faq-answer-link::after {
  content: "→";
  font-size: 0.95rem;
  transition: transform 0.25s ease;
}

.faq-answer-link:hover::after {
  transform: translateX(3px);
}

.form-group--honeypot {
  display: none;
}

/* 宽屏与首页/产品页保持一致的内容节奏 */
@media (min-width: 1800px) {
  .page-section {
    max-width: 1560px;
    padding-left: clamp(3rem, 4vw, 5rem);
    padding-right: clamp(3rem, 4vw, 5rem);
  }

  .contact-layout {
    grid-template-columns: minmax(0, 0.95fr) minmax(560px, 1.05fr);
    gap: clamp(3.5rem, 4vw, 5.5rem);
  }

  .faq-shell {
    max-width: 1360px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .faq-shell {
    padding: 1.5rem 1rem;
    border-radius: 24px;
  }

  .faq-summary {
    grid-template-columns: 1fr;
  }

  .faq-question {
    padding: 1.1rem 1rem;
  }

  .faq-question-text {
    font-size: 0.98rem;
  }

  .faq-answer-inner {
    padding: 0 1rem 1.1rem;
  }
}