/* 勾上去 - 蓝绿色调官网风格，Bootstrap 5 覆盖 */

:root {
  --site-bg: #0a1218;
  --site-bg-block: rgba(13, 148, 136, 0.04);
  --site-card: rgba(255, 255, 255, 0.04);
  --site-border: rgba(255, 255, 255, 0.08);
  --site-primary: #0d9488;
  --site-primary-hover: #0f766e;
  --site-cyan: #06b6d4;
  --site-teal: #14b8a6;
}

body {
  background: var(--site-bg);
  background-image:
    radial-gradient(ellipse 85% 45% at 50% -5%, rgba(13, 148, 136, 0.15), transparent 50%),
    radial-gradient(ellipse 60% 35% at 85% 55%, rgba(6, 182, 212, 0.08), transparent 50%);
  color: rgba(255, 255, 255, 0.9);
}

.navbar {
  background: rgba(10, 18, 24, 0.85) !important;
  backdrop-filter: blur(12px);
}

.navbar-brand {
  color: rgba(255, 255, 255, 0.95) !important;
  font-weight: 600;
}

.nav-logo-icon {
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--site-teal), var(--site-cyan));
  border-radius: 6px;
}

.site-logo {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: block;
}

.hero-logo {
  width: 80px;
  height: 80px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.navbar .nav-link {
  color: rgba(255, 255, 255, 0.75);
  font-weight: 500;
  transition: color 0.2s;
}

.navbar .nav-link:hover {
  color: var(--site-teal);
}

.hero-section {
  position: relative;
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 40%, rgba(13, 148, 136, 0.1) 0%, transparent 55%);
  pointer-events: none;
}

.hero-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--site-teal), var(--site-cyan));
  border-radius: 14px;
}

.hero-section .display-4 {
  color: rgba(255, 255, 255, 0.95);
  letter-spacing: 0.02em;
}

.hero-tagline {
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.badge-hero {
  display: inline-block;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(20, 184, 166, 0.4);
  color: var(--site-teal);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

/* 区块 */
.section-block {
  scroll-margin-top: 76px;
}

.section-title {
  color: rgba(255, 255, 255, 0.92);
  font-weight: 600;
  font-size: 1.5rem;
}

.bg-block {
  background: var(--site-bg-block);
}

.card-glass {
  background: var(--site-card);
  border: 1px solid var(--site-border);
  backdrop-filter: blur(8px);
  color: rgba(255, 255, 255, 0.9);
}

.card-glass .card-title {
  color: rgba(255, 255, 255, 0.92);
}

.card-platform .lead strong {
  color: var(--site-teal);
}

/* 功能介绍图标：矢量图标 */
.feature-icon-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}

.feature-icon-img {
  display: block;
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.card-feature .card-title {
  font-size: 1rem;
}

/* APP 下载 */
.app-qr-wrap {
  width: 140px;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--site-border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.app-qr-icon {
  display: block;
  width: 100px;
  height: 100px;
  object-fit: contain;
}

.app-qr-text {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
}

.app-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--site-border);
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
  min-width: 160px;
}

.app-download-btn:hover {
  background: rgba(20, 184, 166, 0.1);
  border-color: rgba(20, 184, 166, 0.35);
  color: rgba(255, 255, 255, 0.95);
}

.app-download-btn[aria-disabled="true"] {
  opacity: 0.8;
  cursor: not-allowed;
}

.app-btn-icon {
  flex-shrink: 0;
  display: block;
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.app-download-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.app-download-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

.app-download-name {
  font-weight: 600;
}

/* 联系我们 */
.contact-email {
  color: var(--site-teal);
  font-size: 1.25rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}

.contact-email:hover {
  color: var(--site-cyan);
}

/* 表单 */
.card-glass .form-control {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.9);
}

.card-glass .form-control::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.card-glass .form-control:focus {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--site-primary);
  color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 0 0.2rem rgba(13, 148, 136, 0.25);
}

.card-glass .form-label {
  color: rgba(255, 255, 255, 0.75);
}

.btn-primary {
  background: var(--site-primary);
  border-color: var(--site-primary);
}

.btn-primary:hover {
  background: var(--site-primary-hover);
  border-color: var(--site-primary-hover);
}

/* 页脚 */
.footer {
  background: rgba(0, 0, 0, 0.35);
}

.footer-link {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--site-teal);
}

.footer-login {
  display: inline-block;
  margin-top: 0.25rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  font-size: 0.85rem;
}

#subscribe-msg.text-success { color: #34d399 !important; }
#subscribe-msg.text-danger { color: #f87171 !important; }