:root {
  --bg: #0a1211;
  --card: rgba(255, 255, 255, 0.06);
  --card2: rgba(255, 255, 255, 0.08);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.66);
  --line: rgba(255, 255, 255, 0.12);
  /* 与品牌 logo 青绿色一致 */
  --brand: #3eb4a2;
  --brand2: #5ed4c4;
  --brand-dark: #26a69a;
  --brand-deep: #1f8f80;
  --brand-glow: rgba(38, 166, 154, 0.32);
  --brand-border: rgba(94, 212, 196, 0.42);
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --radius2: 14px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(1200px 700px at 18% 0%, rgba(62, 180, 162, 0.2), transparent 58%),
              radial-gradient(900px 600px at 88% 8%, rgba(42, 157, 140, 0.14), transparent 55%),
              linear-gradient(180deg, #081110 0%, #0a1211 55%, #070d0c 100%);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.page {
  max-width: 980px;
  margin: 0 auto;
  padding: 18px 16px 32px;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: linear-gradient(180deg, rgba(8, 17, 16, 0.88) 0%, rgba(8, 17, 16, 0.58) 100%);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 14px 0;
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
  color: inherit;
}
.brand__logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 8px 24px rgba(62, 180, 162, 0.25);
}
.brand__name { font-weight: 800; letter-spacing: 0.5px; font-size: 18px; }
.brand__sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

.main { padding-top: 18px; }

.nav {
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav__link {
  text-decoration: none;
  color: rgba(255,255,255,0.74);
  font-size: 14px;
}
.nav__link:hover { color: rgba(255,255,255,0.95); }
.nav__cta {
  text-decoration: none;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.08);
  border-radius: 999px;
  padding: 8px 12px;
}

.hero {
  border: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(135deg, rgba(62, 180, 162, 0.16), rgba(255,255,255,0.05) 55%, rgba(42, 157, 140, 0.12));
  border-radius: var(--radius);
  padding: 18px 16px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 16px;
  align-items: stretch;
}
.hero__title {
  margin: 0 0 12px;
  font-size: 30px;
  letter-spacing: 0.2px;
}
.hero__desc {
  color: var(--muted);
  line-height: 1.75;
  max-width: 96%;
}
.hero__actions {
  margin-top: 16px;
  display: flex;
  gap: 10px;
}
.hero__actions .btn { width: auto; min-width: 136px; }
.hero__stats {
  display: grid;
  gap: 10px;
}
.stat {
  border-radius: var(--radius2);
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.05);
  padding: 14px;
}
.stat__num {
  font-size: 24px;
  font-weight: 800;
  color: var(--brand2);
}
.stat__label { margin-top: 6px; color: rgba(255,255,255,0.70); font-size: 13px; }

#features,
#products,
#download,
#faq {
  scroll-margin-top: 72px;
}

.section-title {
  margin: 22px 2px 12px;
  font-size: 16px;
  color: rgba(255,255,255,0.88);
  letter-spacing: 0.2px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.card-grid--single { grid-template-columns: 1fr; }

.card {
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--card) 0%, rgba(255,255,255,0.04) 100%);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.35);
}
.card__head { margin-bottom: 14px; }
.card__badge {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
  background: rgba(62, 180, 162, 0.16);
  border: 1px solid rgba(62, 180, 162, 0.32);
  color: #d4f5ef;
}
.card__desc { margin-top: 10px; color: var(--muted); font-size: 13px; }

/* v3：按钮青绿色（与 logo #3eb4a2 / #26a69a 一致） */
a.btn,
button.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(94, 212, 196, 0.42);
  background-color: rgba(62, 180, 162, 0.12);
  background-image: none;
  color: #e8faf6;
  text-decoration: none;
  font-weight: 800;
  font-family: inherit;
  font-size: inherit;
  letter-spacing: 0.2px;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  box-sizing: border-box;
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

a.btn--primary,
button.btn--primary {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.2);
  background-color: #26a69a;
  background-image: linear-gradient(145deg, #3eb4a2 0%, #26a69a 52%, #1f8f80 100%);
  box-shadow: 0 10px 28px rgba(38, 166, 154, 0.35);
}

a.btn--primary:hover,
button.btn--primary:hover {
  background-color: #3eb4a2;
  background-image: linear-gradient(145deg, #5ed4c4 0%, #3eb4a2 48%, #26a69a 100%);
  box-shadow: 0 12px 32px rgba(38, 166, 154, 0.42);
}

a.btn--secondary,
button.btn--secondary {
  color: #dff8f2;
  background-color: rgba(62, 180, 162, 0.18);
  background-image: none;
  border-color: rgba(62, 180, 162, 0.45);
}

a.btn--secondary:hover,
button.btn--secondary:hover {
  background-color: rgba(62, 180, 162, 0.28);
  border-color: rgba(94, 212, 196, 0.55);
}

a.btn--ghost,
button.btn--ghost {
  color: rgba(212, 245, 239, 0.95);
  background-color: rgba(62, 180, 162, 0.08);
  background-image: none;
  border-color: rgba(62, 180, 162, 0.32);
}

a.btn--ghost:hover,
button.btn--ghost:hover {
  background-color: rgba(62, 180, 162, 0.16);
  border-color: rgba(94, 212, 196, 0.45);
  color: #ffffff;
}

a.btn:active,
button.btn:active {
  transform: translateY(1px);
}

a.btn--primary:active,
button.btn--primary:active {
  box-shadow: 0 6px 18px rgba(38, 166, 154, 0.3);
}

.feature,
.tutorial,
.notice {
  margin-top: 8px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.04);
  padding: 14px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.feature-card {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius2);
  background: rgba(255,255,255,0.03);
  padding: 14px;
}
.feature-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}
.feature-card p {
  margin: 0;
  color: rgba(255,255,255,0.70);
  line-height: 1.65;
  font-size: 14px;
}
.notice-inline {
  color: rgba(255,255,255,0.72);
  margin-bottom: 10px;
  line-height: 1.6;
  font-size: 14px;
}

.tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 2px 2px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.tabs__tab {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.78);
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 700;
  cursor: pointer;
}
.tabs__tab.is-active {
  color: #fff;
  border-color: rgba(255,255,255,0.12);
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand2) 100%);
}
.tabs__panel { display: none; padding-top: 12px; }
.tabs__panel.is-active { display: block; }

.steps {
  margin: 0;
  padding-left: 18px;
  color: rgba(255,255,255,0.78);
  line-height: 1.65;
}
.steps code {
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.10);
  padding: 1px 6px;
  border-radius: 8px;
  color: rgba(255,255,255,0.90);
}

.notice__body {
  color: rgba(255,255,255,0.78);
  line-height: 1.7;
}
.notice__body p { margin: 8px 0; }

.footer {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.10);
  color: rgba(255,255,255,0.62);
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}
.footer__muted { color: rgba(255,255,255,0.50); }

/* modal */
.modal {
  border: none;
  padding: 0;
  background: transparent;
}
.modal::backdrop {
  background: rgba(0, 0, 0, 0.65);
}
.modal__panel {
  width: min(520px, calc(100vw - 24px));
  border-radius: var(--radius);
  background: rgba(15, 18, 26, 0.98);
  border: 1px solid rgba(255,255,255,0.10);
  padding: 16px;
  box-shadow: var(--shadow);
}
.modal__title {
  margin: 0 0 12px;
  font-size: 16px;
}
.modal__close {
  position: absolute;
  right: 18px;
  top: 16px;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.78);
  cursor: pointer;
}
.modal__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.modal__hint {
  margin-top: 10px;
  color: rgba(255,255,255,0.58);
  font-size: 12px;
}
.modal__body { color: rgba(255,255,255,0.78); }
.modal__panel--soon {
  position: relative;
  padding: 20px 18px 18px;
  overflow: hidden;
}
.modal__panel--soon::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto;
  height: 220px;
  background: radial-gradient(ellipse at 50% 0%, rgba(62, 180, 162, 0.28), transparent 70%);
  pointer-events: none;
}

/* 敬请期待 */
.coming-soon {
  position: relative;
  text-align: center;
  padding-top: 4px;
}
.coming-soon__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #d4f5ef;
  background: rgba(62, 180, 162, 0.14);
  border: 1px solid rgba(94, 212, 196, 0.35);
}
.coming-soon__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: 0 0 10px rgba(62, 180, 162, 0.75);
  animation: soon-pulse 1.6s ease-in-out infinite;
}
@keyframes soon-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}
.coming-soon__title {
  margin: 14px 0 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.coming-soon__lead {
  margin: 10px 0 0;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.5;
}
.coming-soon__lead em {
  font-style: normal;
  color: var(--brand2);
  font-weight: 700;
}
.coming-soon__desc {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  text-align: left;
}
.coming-soon__tips {
  margin: 14px 0 0;
  padding: 12px 14px 12px 28px;
  text-align: left;
  font-size: 12px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.62);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius2);
}
.coming-soon__tips li + li {
  margin-top: 6px;
}
.coming-soon__btn {
  width: 100%;
  margin-top: 16px;
}

@media (max-width: 720px) {
  .header__inner { flex-wrap: wrap; }
  .nav {
    width: 100%;
    flex-wrap: wrap;
    gap: 10px;
  }
  .hero {
    grid-template-columns: 1fr;
  }
  .hero__title { font-size: 24px; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }
  .feature-grid,
  .card-grid { grid-template-columns: 1fr; }
  .modal__actions { grid-template-columns: 1fr; }
}