/* ===== 基础重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: #1e293b;
  background-color: #f2f7fc;
  background-image:
    radial-gradient(circle at 12% 8%, rgba(39, 170, 198, 0.10), transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(59, 130, 246, 0.08), transparent 45%),
    linear-gradient(180deg, #fbfdff 0%, #eef5fb 55%, #e6eff8 100%);
  background-attachment: fixed;
  min-height: 100vh;
  padding: 0;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

/* ===== 页面容器 ===== */
.page {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 16px;
}
/* ===== PC 端头部 Logo ===== */
.pc-header {
  display: block;
  text-align: center;
  margin-bottom: 24px;
  transition: opacity 0.2s;
}
.pc-header:hover {
  opacity: 0.85;
  text-decoration: none;
}
.pc-header img {
  display: inline-block;
  max-height: 46px;
  width: auto;
  max-width: 100%;
  border: 0;
}

/* ===== 主卡片 ===== */
.card {
  background: #ffffff;
  border-radius: 20px;
  padding: 48px 40px;
  box-shadow: 0 10px 40px rgba(30, 80, 140, 0.10), 0 1px 3px rgba(30, 80, 140, 0.06), 0 0 0 1px rgba(30, 80, 140, 0.04);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, #27aac6, #3b82f6, #27aac6);
}

/* ===== 标题 ===== */
h1 {
  font-size: 26px;
  font-weight: 700;
  color: #0f172a;
  text-align: center;
  letter-spacing: 0.5px;
  line-height: 1.35;
}

.subtitle {
  text-align: center;
  color: #64748b;
  font-size: 13px;
  margin-top: 10px;
  letter-spacing: 2px;
}

/* ===== 搜索表单 ===== */
.search-form {
  display: flex;
  gap: 12px;
  margin-top: 32px;
}

.field {
  flex: 1;
  position: relative;
  min-width: 0;
}

.field .icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
  pointer-events: none;
}

.field input {
  width: 100%;
  height: 52px;
  padding: 0 16px 0 46px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  background: #f8fafc;
  font-size: 15px;
  color: #0f172a;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
  appearance: none;
}

.field input::placeholder { color: #94a3b8; }

.field input:focus {
  border-color: #27aac6;
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(39, 170, 198, 0.12);
}

.submit-btn {
  height: 52px;
  padding: 0 32px;
  background: linear-gradient(135deg, #27aac6 0%, #1b7fa3 100%);
  color: #ffffff;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 3px;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.15s, box-shadow 0.2s;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(39, 170, 198, 0.3);
}

.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(39, 170, 198, 0.4);
}

.submit-btn:active {
  transform: translateY(0);
  box-shadow: 0 3px 8px rgba(39, 170, 198, 0.3);
}

/* ===== 底部标签 ===== */
.features {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid #f1f5f9;
}

.features li {
  font-size: 13px;
  color: #475569;
  padding: 4px 14px;
  background: #f1f5f9;
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
}

.features li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #27aac6;
  margin-right: 8px;
}

/* ===== 页脚 ===== */
.footer {
  text-align: center;
  margin-top: 32px;
  color: #8fa4bc;
  font-size: 13px;
}

/* ===== 移动端适配（与顶部导航断点统一为 768px） ===== */
@media (max-width: 768px) {
  body {
    padding: 0;
  }
  .page {
    padding: 20px 16px;
  }
  .card {
    padding: 36px 24px;
    border-radius: 16px;
  }
  h1 {
    font-size: 20px;
    letter-spacing: 0;
  }
  .subtitle {
    font-size: 12px;
    letter-spacing: 1px;
  }
  .search-form {
    flex-direction: column;
    gap: 10px;
    margin-top: 24px;
  }
  .field input {
    height: 48px;
    font-size: 14px;
  }
  .submit-btn {
    width: 100%;
    height: 48px;
    padding: 0;
  }
  .features {
    margin-top: 22px;
    padding-top: 20px;
  }
  .features li {
    font-size: 12px;
    padding: 3px 12px;
  }
  .footer {
    margin-top: 24px;
    font-size: 12px;
  }
}

/* ===== 顶部导航移动端样式（保持不变） ===== */
@media(min-width:769px){
  .wk-art-top, .wk-art-top.is-sticky, .wk-art-top-placeholder, .wk-art-mask {display: none !important;position: static !important;}
}
@media(max-width:768px){
  .wk-art-top {position: relative;background: #edf8fa;border-bottom: 1px solid #c5d8ea;z-index: 900;transition: background 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;}
  .wk-art-top.is-sticky {position: fixed;top: -1px;left: 0;right: 0;padding-top: 1px;background:#f8f8f8;border-bottom: 1px solid #e5eaf1;box-shadow: 0 2px 10px rgba(15,23,42,0.08);}
  .wk-art-top-placeholder { display: none; }
  .wk-art-top-placeholder.show { display: block; }
  .wk-art-top-inner {height: 45px;padding: 0 10px;display: flex;align-items: center;justify-content: space-between;box-sizing: border-box;}
  .wk-art-top-inner * { box-sizing: border-box; }
  .wk-art-top-logo {display: inline-flex;align-items: center;text-decoration: none;height: 100%;}
  .wk-art-top-logo img {display: block;height: 34px;width: auto;border: 0;filter: brightness(1.15) opacity(0.9);}
  .wk-art-top-toggle {display: block;width: 40px;height: 40px;border: 0;background: transparent;cursor: pointer;padding: 0;position: relative;-webkit-tap-highlight-color: transparent;flex-shrink: 0;}
  .wk-art-top-toggle span {position: absolute;left: 8px;right: 8px;height: 3px;background: #5a8bbd;border-radius: 3px;transition: transform 0.2s, opacity 0.2s, top 0.2s;}
  .wk-art-top-toggle span:nth-child(1) { top: 11px; }
  .wk-art-top-toggle span:nth-child(2) { top: 18px; }
  .wk-art-top-toggle span:nth-child(3) { top: 25px; }
  .wk-art-top-toggle.open span:nth-child(1) { top: 18px; transform: rotate(45deg); }
  .wk-art-top-toggle.open span:nth-child(2) { opacity: 0; }
  .wk-art-top-toggle.open span:nth-child(3) { top: 18px; transform: rotate(-45deg); }
  .wk-art-menu {position: absolute;left: 0;right: 0;top: 100%;background: #fff;border-bottom: 1px solid #c5d8ea;box-shadow: 0 8px 20px rgba(15,23,42,0.10);max-height: 0;overflow: hidden;transition: max-height 0.28s ease;}
  .wk-art-menu.open {max-height: 78vh;overflow-y: auto;-webkit-overflow-scrolling: touch;}
  .wk-art-menu-grid {display: grid;grid-template-columns: 1fr 1fr;padding: 12px 10px 16px;gap: 2px 8px;background: #f5f9fc;}
  .wk-art-menu-grid a {display: block;padding: 12px 8px;font-size: 14px;color: #334155;text-decoration: none;border-radius: 6px;text-align: center;white-space: nowrap;overflow: hidden;text-overflow: ellipsis;transition: background 0.15s, color 0.15s;}
  .wk-art-menu-grid a:active,.wk-art-menu-grid a:hover {background: #eff6ff;color: #2563eb;}
  .wk-art-mask {position: fixed;left: 0; right: 0; top: 0; bottom: 0;background: rgba(15,23,42,0.4);z-index: 899;opacity: 0;visibility: hidden;transition: opacity 0.25s, visibility 0.25s;}
  .wk-art-mask.show {opacity: 1;visibility: visible;}
  .pc-header {display: none;}
}