/* ============================
   联系作者 — 暗色主题
   ============================ */

:root {
  --primary: #ff4848;
  --primary-gradient: linear-gradient(135deg, #ff4848, #ff6b6b);
  --bg: #0a0a0b;
  --card-bg: #111113;
  --text: #ffffff;
  --text-secondary: rgba(255,255,255,.55);
  --text-muted: rgba(255,255,255,.3);
  --border: rgba(255,255,255,.08);
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 2px 8px rgba(0,0,0,.3), 0 0 1px rgba(0,0,0,.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.5);
  --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-body); font-size: 14px; color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased; }

/* ==================== Layout ==================== */
.contact-page { max-width: 56rem; margin: 0 auto; padding: 12rem 3rem 8rem; }

/* ==================== Heading ==================== */
.contact-heading { font-size: 3.6rem; font-weight: 800; text-align: center; margin-bottom: 5rem; letter-spacing: -1px; }

/* ==================== Contact Cards ==================== */
.contact-cards { display: flex; gap: 1.2rem; margin-bottom: 5rem; }
.contact-cards .contact-card { flex: 1; }
.contact-card {
  display: flex; align-items: center; gap: 1.6rem;
  background: var(--card-bg); border-radius: var(--radius);
  padding: 1.8rem 2.2rem; box-shadow: var(--shadow);
  cursor: pointer; transition: transform .2s, box-shadow .2s;
}
.contact-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.cc-icon { width: 5rem; height: 5rem; border-radius: 1.4rem; display: flex; align-items: center; justify-content: center; font-size: 2.6rem; color: #fff; flex-shrink: 0; }
.contact-card.wechat .cc-icon { background: #07c160; }
.contact-card.qq .cc-icon { background: #12b7f5; }
.cc-body { flex: 1; min-width: 0; }
.cc-label { font-size: 1.5rem; font-weight: 700; }
.cc-value { font-size: 1.2rem; color: var(--text-muted); margin-top: .2rem; }
.cc-hint { font-size: 1.1rem; color: var(--text-muted); flex-shrink: 0; }

/* ==================== Form ==================== */
.contact-form-section { background: var(--card-bg); border-radius: var(--radius-lg); padding: 3rem; box-shadow: var(--shadow); }
.contact-form-section h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 2rem; }
.form-row { display: flex; gap: 1.2rem; }
.form-group { flex: 1; margin-bottom: 1.4rem; }
.form-group label { display: block; font-size: 1.2rem; font-weight: 600; margin-bottom: .4rem; color: var(--text-secondary); }
.form-group input, .form-group textarea {
  width: 100%; padding: .9rem 1.2rem; border: 1px solid var(--border);
  border-radius: 10px; font-size: 1.3rem; font-family: var(--font-body);
  outline: none; background: rgba(255,255,255,.04); color: var(--text);
  resize: vertical;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary); }
.form-hint { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 1.6rem; }
.btn-submit {
  display: inline-flex; align-items: center; gap: .8rem;
  padding: 1.1rem 2.8rem; border-radius: 5rem;
  background: var(--primary-gradient); color: #fff;
  font-size: 1.4rem; font-weight: 600; border: none; cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  box-shadow: 0 4px 12px rgba(255,72,72,.2);
}
.btn-submit:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(255,72,72,.3); }

/* ==================== Toast ==================== */
.toast-container { position: fixed; top: 2rem; right: 2rem; z-index: 9999; display: flex; flex-direction: column; gap: .6rem; }
.toast { padding: 1rem 1.8rem; border-radius: 10px; color: #fff; font-size: 1.2rem; font-weight: 600; box-shadow: 0 4px 12px rgba(0,0,0,.3); animation: toastIn .3s ease, toastOut .3s ease 2.7s forwards; max-width: 34rem; }
.toast-success { background: #10b981; }
.toast-error { background: #ef4444; }
@keyframes toastIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toastOut { from { transform: translateX(0); opacity: 1; } to { transform: translateX(100%); opacity: 0; } }

.site-footer { text-align: center; padding: 3rem 2rem; color: var(--text-muted); font-size: 1.2rem; border-top: 1px solid var(--border); }

@media (max-width: 640px) {
  .contact-page { padding: 10rem 2rem 6rem; }
  .contact-heading { font-size: 2.6rem; }
  .form-row { flex-direction: column; }
  .contact-cards { flex-direction: column; }
  .contact-card { padding: 1.4rem 1.6rem; }
}