/* TioCloud Official Site — WeChat Green + iOS Liquid Glass */

:root {
  --wx-green: #07c160;
  --wx-green-light: #39cd80;
  --wx-green-dark: #06ad56;
  --wx-green-glow: rgba(7, 193, 96, 0.45);
  --bg-deep: #0a1610;
  --bg-mid: #0f2218;
  --text-primary: #f5f9f7;
  --text-secondary: rgba(245, 249, 247, 0.72);
  --text-muted: rgba(245, 249, 247, 0.48);
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-bg-strong: rgba(255, 255, 255, 0.14);
  --glass-border: rgba(255, 255, 255, 0.22);
  --glass-border-light: rgba(255, 255, 255, 0.12);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.28);
  --glass-blur: blur(24px) saturate(180%);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --nav-height: 64px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
}

/* ── Background ── */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: linear-gradient(160deg, #0a1610 0%, #0d2818 40%, #061510 100%);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: float 20s ease-in-out infinite;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--wx-green-glow), transparent 70%);
  top: -200px;
  right: -100px;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(57, 205, 128, 0.25), transparent 70%);
  bottom: 10%;
  left: -150px;
  animation-delay: -7s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(7, 193, 96, 0.18), transparent 70%);
  top: 40%;
  left: 50%;
  animation-delay: -14s;
}

.mesh {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent);
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ── Glass utilities ── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.glass-mini {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--glass-border-light);
}

.glass-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 100px;
  background: rgba(7, 193, 96, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(7, 193, 96, 0.3);
  font-size: 13px;
  font-weight: 500;
  color: var(--wx-green-light);
}

.pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--wx-green);
  box-shadow: 0 0 12px var(--wx-green);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 10px 24px;
  border-radius: 100px;
  width: min(920px, calc(100% - 32px));
  transition: top 0.3s, background 0.3s;
}

.nav.scrolled {
  top: 10px;
  background: rgba(10, 22, 16, 0.75);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 28px;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.glass-btn,
.nav-cta {
  padding: 8px 20px;
  border-radius: 100px;
  background: var(--wx-green);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  flex-shrink: 0;
}

.glass-btn:hover,
.nav-cta:hover {
  background: var(--wx-green-light);
  transform: scale(1.03);
  box-shadow: 0 4px 20px var(--wx-green-glow);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 80px;
  left: 16px;
  right: 16px;
  z-index: 99;
  flex-direction: column;
  padding: 20px;
  border-radius: var(--radius-md);
  gap: 4px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  color: var(--text-secondary);
  transition: background 0.2s;
}

.mobile-menu a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

.mobile-cta {
  margin-top: 8px;
  text-align: center;
  background: var(--wx-green) !important;
  color: #fff !important;
  font-weight: 600;
}

/* ── Hero ── */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: 100vh;
  padding: calc(var(--nav-height) + 60px) 48px 80px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-content {
  animation: fadeUp 0.8s ease-out;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero h1 {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 24px 0 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--wx-green-light), var(--wx-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--wx-green);
  color: #fff;
  box-shadow: 0 4px 24px var(--wx-green-glow);
}

.btn-primary:hover {
  background: var(--wx-green-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--wx-green-glow);
}

.btn-glass {
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

.hero-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.stat {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  min-width: 110px;
}

.stat strong {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--wx-green-light);
}

.stat span {
  font-size: 12px;
  color: var(--text-muted);
}

/* Phone mockup */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  animation: fadeUp 0.8s ease-out 0.2s both;
}

.phone-frame {
  width: 280px;
  border-radius: 40px;
  padding: 12px;
  position: relative;
  z-index: 2;
}

.phone-notch {
  width: 100px;
  height: 24px;
  background: var(--bg-deep);
  border-radius: 0 0 16px 16px;
  margin: 0 auto 8px;
}

.phone-screen {
  background: linear-gradient(180deg, rgba(7, 193, 96, 0.08) 0%, rgba(0, 0, 0, 0.2) 100%);
  border-radius: 28px;
  padding: 16px;
  min-height: 420px;
  display: flex;
  flex-direction: column;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 13px;
  font-weight: 600;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--wx-green), var(--wx-green-dark));
}

.chat-bubbles {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bubble {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 13px;
  line-height: 1.4;
}

.bubble-in {
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.bubble-out {
  align-self: flex-end;
  background: var(--wx-green);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.video-thumb {
  width: 100%;
  height: 60px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(7, 193, 96, 0.4), rgba(0, 0, 0, 0.3));
  margin-bottom: 6px;
}

.chat-input {
  height: 36px;
  border-radius: 18px;
  margin-top: 12px;
}

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  animation: floatCard 4s ease-in-out infinite;
}

.float-card svg {
  width: 16px;
  height: 16px;
  color: var(--wx-green-light);
}

.card-1 {
  top: 20%;
  left: -20px;
  animation-delay: 0s;
}

.card-2 {
  bottom: 25%;
  right: -30px;
  animation-delay: -2s;
}

@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ── Sections ── */
section {
  padding: 100px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 17px;
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  transition: transform 0.3s, border-color 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(7, 193, 96, 0.35);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(7, 193, 96, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: var(--wx-green-light);
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Download */
.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.download-card {
  position: relative;
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  transition: transform 0.3s, border-color 0.3s;
  overflow: hidden;
}

.download-card.has-chip-select {
  overflow: visible;
  z-index: 1;
}

.download-card.has-chip-select:hover,
.download-card.has-chip-select:focus-within {
  z-index: 30;
}

.download-card:hover {
  transform: translateY(-4px);
  border-color: rgba(7, 193, 96, 0.4);
}

.download-card.featured {
  border-color: rgba(7, 193, 96, 0.35);
}

.card-glow {
  position: absolute;
  top: -50%;
  right: -30%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--wx-green-glow), transparent 70%);
  pointer-events: none;
}

.platform-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.platform-icon svg {
  width: 26px;
  height: 26px;
}

.mobile-icon { background: rgba(7, 193, 96, 0.2); color: var(--wx-green-light); }
.web-icon { background: rgba(100, 180, 255, 0.15); color: #64b4ff; }
.win-icon { background: rgba(0, 164, 239, 0.15); color: #00a4ef; }
.mac-icon { background: rgba(200, 200, 210, 0.12); color: #c8c8d2; }

.download-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.platform-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.5;
}

.download-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.download-actions.single {
  flex-direction: column;
}

.dl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--glass-border-light);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  flex: 1;
  min-width: 140px;
}

.dl-btn svg {
  width: 18px;
  height: 18px;
}

.dl-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: scale(1.02);
}

.dl-btn.ios,
.dl-btn.android,
.dl-btn.windows,
.dl-btn.mac,
.dl-btn.web {
  background: var(--wx-green);
  border-color: transparent;
  color: #fff;
}

.dl-btn.ios:hover,
.dl-btn.android:hover,
.dl-btn.windows:hover,
.dl-btn.mac:hover,
.dl-btn.web:hover {
  background: var(--wx-green-light);
  box-shadow: 0 4px 20px var(--wx-green-glow);
}

.dl-btn.mac-alt {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

/* macOS chip selector dropdown */
.dl-dropdown {
  position: relative;
  width: 100%;
}

.dl-dropdown-trigger {
  width: 100%;
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.dl-dropdown-trigger:hover {
  transform: scale(1.02);
}

.dl-dropdown-chevron {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform 0.2s;
}

.dl-dropdown:hover .dl-dropdown-chevron,
.dl-dropdown:focus-within .dl-dropdown-chevron,
.dl-dropdown.is-open .dl-dropdown-chevron {
  transform: rotate(180deg);
}

.dl-dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  border-radius: 14px;
  background: rgba(22, 26, 32, 0.98);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transform-origin: top center;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  pointer-events: none;
}

.dl-dropdown-menu::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 100%;
  height: 12px;
}

.dl-dropdown:hover .dl-dropdown-menu,
.dl-dropdown:focus-within .dl-dropdown-menu,
.dl-dropdown.is-open .dl-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.download-card.has-chip-select .version-tag {
  position: relative;
  z-index: 0;
}

.dl-dropdown-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 14px 16px;
  border-radius: 10px;
  color: #fff;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}

.dl-dropdown-item:hover {
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(255, 255, 255, 0.14);
  transform: translateY(-1px);
}

.dl-dropdown-item.mac:hover {
  background: rgba(7, 193, 96, 0.18);
  border-color: rgba(7, 193, 96, 0.35);
}

.dl-dropdown-item.mac-alt:hover {
  background: rgba(255, 255, 255, 0.13);
  border-color: rgba(255, 255, 255, 0.18);
}

.dl-dropdown-item-label {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.dl-dropdown-item-hint {
  font-size: 12px;
  font-weight: 500;
  line-height: 1.3;
  color: rgba(255, 255, 255, 0.45);
}

.version-tag {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

/* QR section */
.qr-section {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-top: 48px;
  padding: 36px 40px;
  border-radius: var(--radius-lg);
}

.qr-block {
  text-align: center;
  flex-shrink: 0;
}

.qr-code {
  display: block;
  border-radius: 12px;
  background: #fff;
  padding: 8px;
}

.qr-block p {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.qr-info h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.qr-info p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.qr-info ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.qr-info li {
  font-size: 13px;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
}

.qr-info li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--wx-green);
}

/* CTA banner */
.cta-banner {
  text-align: center;
  padding: 64px 48px;
  border-radius: var(--radius-lg);
  margin-bottom: 40px;
}

.cta-banner h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 10px;
}

.cta-banner p {
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--glass-border-light);
  padding: 40px 48px 48px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--text-primary);
}

.copyright {
  width: 100%;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: calc(var(--nav-height) + 40px);
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions,
  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  section {
    padding: 72px 24px;
  }

  .hero {
    padding: calc(var(--nav-height) + 32px) 24px 60px;
  }

  .feature-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .qr-section {
    flex-direction: column;
    text-align: center;
    padding: 28px 24px;
  }

  .qr-info ul {
    align-items: center;
  }

  .float-card {
    display: none;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .phone-frame {
    width: 240px;
  }

  .hero-stats {
    flex-direction: column;
    align-items: center;
  }

  .stat {
    width: 100%;
    max-width: 200px;
    text-align: center;
  }
}