:root {
  color-scheme: light;
  --bg: #eef2fb;
  --bg-strong: #e6ecf8;
  --surface: #ffffff;
  --surface-muted: #f0f4fa;
  --ink: #111827;
  --ink-soft: #1a2e4d;
  --ink-muted: #667085;
  --accent: #6c52f4;
  --accent-strong: #4f7cff;
  --accent-soft: rgba(108, 82, 244, 0.16);
  --teal: #2fd0c8;
  --teal-soft: rgba(47, 208, 200, 0.16);
  --gold: #ffb724;
  --shadow-lg: 0 30px 80px rgba(15, 22, 18, 0.12);
  --shadow-md: 0 16px 40px rgba(15, 22, 18, 0.1);
  --shadow-sm: 0 10px 20px rgba(15, 22, 18, 0.08);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  display: block;
}

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

.container {
  width: min(92vw, var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px) saturate(140%);
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.85), rgba(238, 242, 251, 0.7));
  border-bottom: 1px solid rgba(108, 82, 244, 0.12);
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand img {
  width: auto;
  height: 38px;
  border-radius: 10px;
}

.brand-pair {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.brand-divider {
  font-weight: 600;
  color: var(--ink-muted);
  font-size: 14px;
}

.brand-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 18px;
  color: var(--ink-muted);
}

.nav-links a {
  position: relative;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(10px) saturate(140%);
  border: 1px solid rgba(108, 82, 244, 0.12);
}

.nav-links a::after {
  content: none;
}

.nav-links a:hover {
  box-shadow: 0 8px 20px rgba(108, 82, 244, 0.18);
  border-color: rgba(108, 82, 244, 0.35);
}

.nav-links a.is-active {
  box-shadow: 0 10px 24px rgba(108, 82, 244, 0.22);
  border-color: rgba(108, 82, 244, 0.4);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(18, 32, 25, 0.15);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  font-size: 17px;
  cursor: pointer;
}

.hero {
  position: relative;
  padding: 64px 0 72px;
  overflow: hidden;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(0px);
  opacity: 0.8;
  z-index: 0;
}

.hero::before {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle at top, rgba(108, 82, 244, 0.3), transparent 60%);
  top: -120px;
  right: -160px;
}

.hero::after {
  width: 380px;
  height: 380px;
  background: radial-gradient(circle at top, rgba(47, 208, 200, 0.28), transparent 60%);
  bottom: -140px;
  left: -160px;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  position: relative;
  z-index: 1;
}

.hero-key {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink-muted);
  margin: 0 0 12px;
}

.eyebrow {
  font-size: 14px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.hero h1,
.section-title {
  font-family: "Fraunces", "Georgia", serif;
  font-weight: 600;
  font-size: clamp(2.1rem, 3.2vw, 3rem);
  margin: 12px 0 18px;
  letter-spacing: -0.01em;
}

.hero h1 {
  font-size: clamp(1.8rem, 2.6vw, 2.5rem);
}

.download-dual {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.download-btn img {
  width: 18px;
  height: 18px;
}

.download-btn .divider {
  color: rgba(255, 255, 255, 0.75);
}

.download-btn.ghost .divider {
  color: var(--ink-muted);
}

.download-split {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  overflow: hidden;
  box-shadow: 0 16px 30px rgba(108, 82, 244, 0.25);
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
}

.download-split .download-half {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  color: #fff;
  font-weight: 600;
  font-size: 16px;
}

.download-split img {
  width: 18px;
  height: 18px;
}

.download-split .download-half + .download-half {
  border-left: 1px solid rgba(255, 255, 255, 0.3);
}

.download-split.ghost {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: none;
  border: 1px solid rgba(17, 24, 39, 0.15);
}

.download-split.ghost .download-half {
  color: var(--ink);
}

.download-split.ghost .download-half + .download-half {
  border-left: 1px solid rgba(17, 24, 39, 0.12);
}

.hero p {
  font-size: 1.1rem;
  color: var(--ink-soft);
}

.hero-media {
  padding: 18px;
}

.hero-media img {
  border-radius: var(--radius-md);
}

.hero-caption {
  margin-top: 12px;
  font-size: 20px;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 16px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button-primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  color: #fff;
  box-shadow: 0 16px 30px rgba(108, 82, 244, 0.25);
}

.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 35px rgba(79, 124, 255, 0.3);
}

.button-ghost {
  border-color: rgba(18, 32, 25, 0.2);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.7);
}

.hero-card {
  background: rgba(255, 255, 255, 0.78);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 18px;
  backdrop-filter: blur(16px) saturate(140%);
}

.hero-card .badge {
  align-self: flex-start;
  background: var(--accent-soft);
  color: var(--accent-strong);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-card h3 {
  margin: 0;
  font-size: 1.4rem;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.metric {
  background: var(--surface-muted);
  border-radius: var(--radius-sm);
  padding: 14px;
  text-align: left;
}

.metric strong {
  display: block;
  font-size: 1.4rem;
  color: var(--ink);
}

.metric span {
  font-size: 14px;
  color: var(--ink-muted);
}

.section {
  padding: 72px 0;
}

.section.alt {
  background: var(--bg-strong);
}

.section-title {
  font-size: clamp(2rem, 3vw, 3rem);
  margin-bottom: 10px;
}

.section-subtitle {
  color: var(--ink-muted);
  font-size: 1.05rem;
  margin-bottom: 30px;
  max-width: 720px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.card {
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 200px;
  backdrop-filter: blur(12px) saturate(140%);
}

.card .icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--ink);
  background: var(--teal-soft);
}

.card h4 {
  margin: 0;
}

.card p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1rem;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 26px;
}

.product-card {
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(12px) saturate(140%);
}

.product-card img {
  width: 100%;
  height: 220px;
  object-fit: contain;
  background: #fff;
  margin-top: 20px;
}

.product-card .content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.product-card h3 {
  margin: 0;
}

.product-card p {
  margin: 4px 0 0;
}

.product-card .actions {
  margin-top: auto;
}

.product-card .tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
}

.product-card a.button {
  align-self: flex-start;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.timeline-step {
  background: rgba(255, 255, 255, 0.85);
  padding: 22px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px) saturate(140%);
}

.timeline-step span {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ink-muted);
  text-transform: uppercase;
}

.media-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: center;
}

.media-panel {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px) saturate(140%);
}

.media-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(18, 32, 25, 0.08);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.testimonial-grid {
  overflow-x: auto;
  overflow-y: hidden;
  cursor: grab;
  scroll-behavior: smooth;
  scrollbar-width: none;
}

.testimonial-grid::-webkit-scrollbar {
  display: none;
}

.testimonial-card {
  background: rgba(255, 255, 255, 0.88);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 16px;
  backdrop-filter: blur(12px) saturate(140%);
  min-width: 280px;
  flex: 0 0 calc((100% - 40px) / 3);
}

.testimonial-quote {
  font-size: 1rem;
  color: var(--ink-soft);
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-muted);
  font-size: 14px;
}

.testimonial-stars {
  color: #f5c245;
  font-size: 16px;
  letter-spacing: 1px;
}

.testimonial-track {
  display: flex;
  gap: 20px;
  animation: testimonial-scroll 24s linear infinite;
  scroll-snap-type: x mandatory;
}

.testimonial-track:hover {
  animation-play-state: paused;
}

.testimonial-track.is-dragging {
  cursor: grabbing;
  animation-play-state: paused;
}

.testimonial-card {
  scroll-snap-align: start;
}

@keyframes testimonial-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.testimonial-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--accent), var(--teal));
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 600;
}

.site-footer {
  padding: 40px 0 60px;
  background: #0f1a14;
  color: #f7f4ee;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.footer-grid h4 {
  margin: 0 0 12px;
  font-size: 16px;
}

.footer-grid p,
.footer-grid a {
  color: rgba(247, 244, 238, 0.78);
  font-size: 15px;
}

.footer-note {
  margin-top: 24px;
  font-size: 14px;
  color: rgba(247, 244, 238, 0.6);
}

.fade-up {
  opacity: 0;
  transform: translateY(18px);
  animation: fadeUp 0.8s ease forwards;
}

.fade-up.delay-1 {
  animation-delay: 0.1s;
}

.fade-up.delay-2 {
  animation-delay: 0.2s;
}

.fade-up.delay-3 {
  animation-delay: 0.3s;
}

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

@media (max-width: 980px) {
  .hero-grid,
  .media-block {
    grid-template-columns: 1fr;
  }

  .hero-card {
    order: 2;
  }
}

@media (max-width: 860px) {
  .nav-links {
    position: absolute;
    top: 70px;
    right: 16px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    flex-direction: column;
    padding: 16px 18px;
    gap: 14px;
    display: none;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 44px 0 56px;
  }

  .hero-card {
    padding: 22px;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 56px 0;
  }
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(180px, 260px) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.about-nav {
  position: sticky;
  top: 96px;
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  backdrop-filter: blur(16px) saturate(140%);
}

.about-nav h4 {
  margin: 12px 0 6px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}

.about-nav a,
.about-nav button {
  appearance: none;
  background: rgba(255, 255, 255, 0.35);
  border: none;
  padding: 6px 8px;
  border-radius: 10px;
  text-align: left;
  font-size: 16px;
  color: var(--ink);
  cursor: pointer;
  backdrop-filter: blur(8px) saturate(140%);
  transition: background 0.2s ease, transform 0.2s ease;
}

.about-nav button.is-active {
  background: rgba(108, 82, 244, 0.18);
  color: var(--accent-strong);
  font-weight: 600;
}

.about-nav button:hover {
  background: rgba(108, 82, 244, 0.12);
  transform: translateY(-1px);
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-section {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.about-content-frame {
  background: rgba(255, 255, 255, 0.88);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
  backdrop-filter: blur(16px) saturate(140%);
}

.about-content-frame.is-loading {
  position: relative;
  opacity: 0.9;
}

.about-content-frame.is-loading::after {
  content: "内容加载中…";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--ink-muted);
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-md);
}

.about-iframe {
  width: 100%;
  border: 0;
  min-height: 70vh;
  overflow: hidden;
}

.about-section h3 {
  margin-top: 0;
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.modal.is-open {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 22, 18, 0.55);
}

.modal-card {
  position: relative;
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 28px;
  width: min(92vw, 480px);
  box-shadow: var(--shadow-lg);
  z-index: 1;
}

.modal-card h3 {
  margin-top: 0;
}

.modal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.modal-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(18, 32, 25, 0.15);
  background: var(--surface-muted);
  font-weight: 600;
  font-size: 14px;
}

.modal-button img {
  width: 18px;
  height: 18px;
}

.nav-links a {
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(10px) saturate(140%);
  border: 1px solid rgba(108, 82, 244, 0.12);
}

.nav-links a:hover,
.nav-links a.is-active {
  background: rgba(255, 255, 255, 0.75);
  border-color: rgba(108, 82, 244, 0.28);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  border: none;
  background: transparent;
  font-size: 18px;
  cursor: pointer;
  color: var(--ink-muted);
}

@media (max-width: 860px) {
  .about-layout {
    grid-template-columns: 1fr;
  }

  .about-nav {
    position: static;
  }
}