:root {
  --bg: #070b16;
  --bg-soft: #0f172a;
  --card: rgba(255, 255, 255, 0.06);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #60a5fa;
  --primary-strong: #3b82f6;
  --line: rgba(255, 255, 255, 0.15);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top right, #1d4ed8 0%, var(--bg) 45%);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  scroll-behavior: smooth;
}

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

.container {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(7, 11, 22, 0.6);
  border-bottom: 1px solid var(--line);
}

.nav {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 800;
  font-size: clamp(0.75rem, 3vw, 1.1rem);
  letter-spacing: 0.2px;
  line-height: 1.2;
  max-width: 46%;
}

nav {
  display: flex;
  gap: 22px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

nav a {
  color: var(--muted);
  font-weight: 500;
}

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

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
}

.lang-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
}

.lang-btn.active {
  color: #fff;
  background: rgba(96, 165, 250, 0.3);
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 36px;
  align-items: center;
  padding: 56px 0 20px;
}

.eyebrow {
  color: #93c5fd;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 700;
  font-size: 0.8rem;
}

h1 {
  font-size: clamp(2.1rem, 5vw, 3.8rem);
  line-height: 1.1;
  margin: 8px 0 16px;
}

.subtitle {
  color: var(--muted);
  max-width: 560px;
  line-height: 1.7;
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  border-radius: 999px;
  padding: 12px 22px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: 0.25s ease;
  font-size: 0.95rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

.hero-card {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-phone-wrap {
  position: relative;
  width: 280px;
  border-radius: 42px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 32px 64px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255,255,255,0.06);
}

.hero-screenshot {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.section {
  padding: 86px 0 30px;
}

h2 {
  margin: 0 0 22px;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

/* 通用卡片 */
.card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 16px;
  overflow: hidden;
  padding: 24px;
}

.card p {
  color: var(--muted);
  line-height: 1.65;
}

/* 图文特性卡片：覆盖通用 card 的 padding，由内部 .feature-body 控制 */
.feature-card {
  padding: 0;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.feature-img-wrap {
  width: 100%;
  height: 280px;
  overflow: hidden;
  border-radius: 0;
}

.feature-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  transition: transform 0.5s ease;
}

.feature-card:hover .feature-img {
  transform: scale(1.04);
}

.feature-body {
  padding: 20px 22px 24px;
}

.feature-body h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.feature-body p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
  font-size: 0.92rem;
}

/* Gallery 大图展示区 */
.gallery-showcase {
  margin-top: 18px;
  overflow: hidden;
}

.gallery-bg-wrap {
  position: relative;
  max-height: 600px;
  overflow: hidden;
}

.gallery-bg-img {
  width: 100%;
  height: 600px;
  object-fit: cover;
  object-position: center 45%; /* 跳过顶部Exclusive标题，展示图片网格内容 */
  display: block;
  filter: brightness(0.72);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 40px 24px;
  background: linear-gradient(to top, rgba(7,11,22,0.85) 0%, transparent 50%);
}

.gallery-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 18px;
}

.gallery-tag {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  cursor: default;
  transition: background 0.2s;
}

.gallery-tag:hover {
  background: rgba(96, 165, 250, 0.25);
}

.gallery-caption {
  color: #cbd5e1;
  font-size: 1rem;
  margin: 0;
  text-align: center;
}

.cta {
  margin: 40px 0 70px;
}

.cta-inner {
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(59, 130, 246, 0.15), rgba(15, 23, 42, 0.9));
  padding: 56px 24px;
}

.cta-inner p {
  color: #cbd5e1;
}

.cta .hero-actions {
  justify-content: center;
}

.tip {
  min-height: 24px;
  margin-top: 12px;
  color: #93c5fd;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(2, 6, 23, 0.6);
}

.footer-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 18px;
}

.footer-links a {
  color: var(--muted);
}

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

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.legal-doc {
  max-width: 720px;
  padding-bottom: 64px;
}

.legal-doc h1 {
  margin-bottom: 8px;
}

.legal-updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.legal-doc h2 {
  font-size: 1.15rem;
  margin: 28px 0 12px;
  color: var(--text);
}

.legal-doc > p {
  color: var(--muted);
  line-height: 1.8;
  margin: 0 0 14px;
}

.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

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

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.78);
  backdrop-filter: blur(6px);
}

.modal-panel {
  position: relative;
  width: min(400px, 100%);
  padding: 28px 26px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(15, 23, 42, 0.98), rgba(7, 11, 22, 0.98));
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  text-align: center;
}

.modal-title {
  margin: 0 0 14px;
  font-size: 1.25rem;
}

.modal-body {
  margin: 0 0 22px;
  color: var(--muted);
  line-height: 1.7;
  font-size: 0.98rem;
}

.modal-ok {
  min-width: 120px;
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-card {
    order: -1;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(1120px, calc(100% - 30px));
  }

  nav {
    gap: 12px;
    font-size: 0.9rem;
  }

  .nav-right {
    gap: 10px;
  }

  .lang-btn {
    padding: 7px 10px;
  }

  .gallery {
    grid-template-columns: 1fr;
  }

  .phone {
    width: 280px;
    height: 560px;
  }
}