@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=Syne:wght@600;700;800&display=swap');

:root {
  --bg0: #0b1f1a;
  --bg1: #12261f;
  --bg2: #1a3328;
  --text: #e8f5ef;
  --muted: #8fa89a;
  --accent: #3dcc8c;
  --accent-ink: #062016;
  --line: rgba(61, 204, 140, 0.22);
  --font-display: 'Syne', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --max: 1080px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(61, 204, 140, 0.12), transparent 55%),
    linear-gradient(160deg, var(--bg0), var(--bg1) 45%, var(--bg2));
  min-height: 100vh;
}

.wrap { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(11, 31, 26, 0.72);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem 0; gap: 1rem;
}
.brand {
  font-family: var(--font-display);
  font-weight: 800; font-size: 1.25rem;
  letter-spacing: 0.02em; color: var(--text); text-decoration: none;
}
.nav { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.nav a:hover { color: var(--accent); }
.lang-switch { display: inline-flex; gap: 0.25rem; }
.lang-btn {
  border: 1px solid var(--line); background: transparent; color: var(--muted);
  padding: 0.35rem 0.55rem; cursor: pointer; font: inherit;
}
.lang-btn[aria-pressed="true"] {
  color: var(--accent-ink); background: var(--accent); border-color: var(--accent);
}

.hero {
  min-height: calc(100vh - 64px);
  display: grid; align-items: center;
  padding: 3rem 0 4rem;
  position: relative;
}
.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800; margin: 0 0 0.75rem; letter-spacing: -0.02em;
}
.hero-eyebrow {
  margin: 0 0 0.55rem;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 700; line-height: 1.2; margin: 0 0 0.75rem; max-width: 18ch;
}
.hero .sub { color: var(--muted); max-width: 36ch; margin: 0 0 1.5rem; }
.btn-primary {
  display: inline-block; text-decoration: none;
  background: var(--accent); color: var(--accent-ink);
  font-weight: 600; padding: 0.85rem 1.25rem;
}
.hero-chart {
  position: absolute; right: 0; bottom: 12%; width: min(42vw, 420px);
  opacity: 0.45; pointer-events: none;
}
@media (max-width: 720px) {
  .hero-chart { position: static; width: 100%; opacity: 0.35; margin-top: 2rem; }
  .hero { min-height: auto; padding-top: 2.5rem; }
}

section { padding: 4rem 0; border-top: 1px solid var(--line); }
section h2 {
  font-family: var(--font-display);
  font-size: 1.6rem; margin: 0 0 1.5rem;
}
.feature-list {
  display: grid; gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.feature-list article {
  border-top: 1px solid var(--line); padding-top: 0.9rem;
}
.feature-list h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.feature-list p { margin: 0; color: var(--muted); line-height: 1.5; }

.section-lead {
  color: var(--muted); margin: -0.75rem 0 1.5rem; max-width: 48ch; line-height: 1.5;
}
.shot-grid {
  display: grid; gap: 1.25rem;
  grid-template-columns: repeat(2, 1fr);
}
@media (max-width: 720px) {
  .shot-grid { grid-template-columns: 1fr; }
}
.shot { margin: 0; }
.shot-frame {
  aspect-ratio: 16 / 10;
  border: 1px dashed var(--line);
  background:
    linear-gradient(135deg, rgba(61, 204, 140, 0.06), transparent 40%),
    rgba(8, 22, 18, 0.55);
  overflow: hidden;
  display: grid; place-items: center;
  position: relative;
}
.shot-frame img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
  grid-area: 1 / 1;
  cursor: zoom-in;
}
.shot-frame img[data-lightbox]:hover {
  opacity: 0.92;
}

.lightbox {
  position: fixed; inset: 0; z-index: 100;
  display: grid;
  grid-template-rows: auto 1fr auto;
  align-items: center;
  justify-items: center;
  padding: 1rem;
  background: rgba(4, 14, 11, 0.92);
  backdrop-filter: blur(6px);
}
.lightbox[hidden] { display: none !important; }
.lightbox img {
  max-width: min(96vw, 1280px);
  max-height: calc(100vh - 6rem);
  width: auto; height: auto;
  object-fit: contain;
  grid-row: 2;
}
.lightbox-caption {
  grid-row: 3;
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.lightbox-close {
  position: absolute; top: 0.75rem; right: 0.9rem;
  border: 0; background: transparent;
  color: var(--text); font-size: 2rem; line-height: 1;
  cursor: pointer; padding: 0.2rem 0.5rem;
}
.lightbox-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  border: 1px solid var(--line);
  background: rgba(11, 31, 26, 0.8);
  color: var(--text);
  font-size: 2rem; line-height: 1;
  width: 2.5rem; height: 2.5rem;
  cursor: pointer;
}
.lightbox-nav.prev { left: 0.75rem; }
.lightbox-nav.next { right: 0.75rem; }
.lightbox-nav:hover, .lightbox-close:hover { color: var(--accent); }

body.lightbox-open { overflow: hidden; }
.shot figcaption {
  margin-top: 0.55rem;
  color: var(--muted); font-size: 0.9rem;
}

.process-steps {
  display: grid; gap: 1.25rem;
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 720px) {
  .process-steps { grid-template-columns: 1fr; }
}
.process-steps article { border-left: 2px solid var(--accent); padding-left: 0.9rem; }
.process-steps .step-num { color: var(--accent); font-weight: 600; font-size: 0.85rem; }
.process-steps h3 { margin: 0.25rem 0; }
.process-steps p { margin: 0; color: var(--muted); }

.contact-panel { display: grid; gap: 1rem; max-width: 28rem; }
.contact-panel img {
  width: 180px; height: 180px; object-fit: contain;
  background: #fff; padding: 0.5rem;
}
.contact-zh[hidden], .contact-en[hidden] { display: none !important; }
.wechat-id, .email-link { color: var(--accent); font-weight: 600; }
.email-link { text-decoration: none; }
.email-link:hover { text-decoration: underline; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem; color: var(--muted); font-size: 0.85rem;
}
.site-footer .risk { max-width: 62ch; line-height: 1.55; margin-bottom: 1rem; }