:root {
  --bg: #0b1020;
  --bg-2: #131a30;
  --card: rgba(15, 19, 38, 0.78);
  --card-2: rgba(255, 247, 238, 0.08);
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(255, 255, 255, 0.18);
  --text: #f6f0e7;
  --muted: rgba(246, 240, 231, 0.74);
  --accent: #ff7a18;
  --accent-2: #7c3aed;
  --accent-3: #33d1ff;
  --paper: #fff8ef;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
  background:
    radial-gradient(circle at 12% 18%, rgba(255, 122, 24, 0.18), transparent 26%),
    radial-gradient(circle at 82% 6%, rgba(124, 58, 237, 0.18), transparent 22%),
    radial-gradient(circle at 50% 115%, rgba(51, 209, 255, 0.08), transparent 30%),
    linear-gradient(180deg, #0b1020 0%, #12182b 48%, #0c1020 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle, rgba(255, 255, 255, 0.035) 1px, transparent 1px) 0 0 / 22px 22px,
    radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.08), transparent 38%);
  opacity: 0.34;
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(255, 122, 24, 0.08), transparent 22%),
    linear-gradient(315deg, rgba(124, 58, 237, 0.08), transparent 24%);
  z-index: -1;
}

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

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

p {
  line-height: 1.85;
  margin: 0;
}

.page-wrap {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(8, 12, 24, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header .page-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand img {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  box-shadow: 0 10px 24px rgba(255, 122, 24, 0.25);
}

.brand span {
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand small {
  display: block;
  margin-top: 2px;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.12em;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 48px;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 11px 16px;
  border-radius: 999px;
  color: var(--muted);
  border: 1px solid transparent;
  transition: 0.2s ease;
}

.nav-links .btn {
  width: auto;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--line);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 0;
  border-radius: 999px;
  padding: 14px 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, #ff9348 100%);
  box-shadow: 0 18px 32px rgba(255, 122, 24, 0.28);
}

.btn-ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
}

.hero {
  position: relative;
  padding: 54px 0 18px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, 0.98fr);
  gap: 28px;
  align-items: center;
}

.hero-copy,
.panel,
.feature-card,
.stat-card,
.shot-card,
.link-card,
.quote-card,
.step-card,
.faq-card,
.sidebar-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
  box-shadow: var(--shadow);
}

.hero-copy {
  border-radius: var(--radius-xl);
  padding: 34px 32px 32px;
  background:
    linear-gradient(135deg, rgba(255, 122, 24, 0.14), transparent 30%),
    linear-gradient(180deg, rgba(15, 19, 38, 0.92), rgba(15, 19, 38, 0.66));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  color: #ffddb8;
  background: rgba(255, 122, 24, 0.12);
  border: 1px solid rgba(255, 122, 24, 0.24);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
}

.hero h1 {
  margin: 18px 0 16px;
  font-size: clamp(2.3rem, 4.8vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.hero p {
  max-width: 60ch;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.92rem;
}

.hero-art {
  display: grid;
  gap: 14px;
}

.hero-stack {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 14px;
}

.panel {
  border-radius: var(--radius-xl);
  padding: 16px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    rgba(13, 17, 32, 0.76);
}

.hero-shot {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 20px;
  object-fit: cover;
  margin: 0 auto;
}

.hero-main {
  padding: 12px;
  background: linear-gradient(180deg, rgba(255, 122, 24, 0.12), rgba(255, 255, 255, 0.02));
}

.hero-side {
  display: grid;
  gap: 14px;
}

.hero-side .panel {
  padding: 12px;
}

.hero-side .hero-shot {
  max-width: 100%;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.stat-card {
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
    rgba(17, 21, 40, 0.82);
}

.stat-card strong {
  display: block;
  font-size: 1.42rem;
  margin-bottom: 6px;
}

.stat-card span {
  color: var(--muted);
  line-height: 1.7;
}

.section {
  padding: 42px 0 10px;
}

.section-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.section-title h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  letter-spacing: -0.03em;
}

.section-title p {
  max-width: 60ch;
  color: var(--muted);
}

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

.feature-card {
  border-radius: var(--radius-lg);
  padding: 22px;
  min-height: 188px;
  background:
    linear-gradient(145deg, rgba(255, 122, 24, 0.12), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
}

.feature-card h3,
.link-card h3,
.quote-card h3,
.step-card h3,
.faq-card summary,
.sidebar-card h3 {
  margin: 0;
  font-size: 1.08rem;
}

.feature-card p,
.link-card p,
.quote-card p,
.step-card p,
.sidebar-card p,
.faq-card p,
.faq-card li,
.content-text p,
.content-text li {
  color: var(--muted);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(255, 122, 24, 0.2), rgba(124, 58, 237, 0.2));
  border: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 14px;
  font-size: 1.22rem;
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 14px;
}

.shot-card {
  border-radius: var(--radius-lg);
  padding: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    rgba(15, 19, 38, 0.86);
}

.shot-card img {
  width: 100%;
  max-width: 400px;
  height: auto;
  margin: 0 auto;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.shot-card p {
  margin-top: 12px;
  font-size: 0.95rem;
  color: var(--muted);
}

.shot-card.wide {
  grid-column: span 6;
}

.shot-card.narrow {
  grid-column: span 3;
}

.shot-card.large {
  grid-column: span 5;
}

.link-grid,
.quote-grid,
.step-grid,
.faq-grid {
  display: grid;
  gap: 14px;
}

.link-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.link-card {
  border-radius: var(--radius-lg);
  padding: 22px;
  background:
    linear-gradient(160deg, rgba(255, 122, 24, 0.12), rgba(124, 58, 237, 0.08)),
    rgba(15, 19, 38, 0.86);
}

.link-card .btn {
  margin-top: 16px;
}

.quote-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.quote-card {
  border-radius: var(--radius-lg);
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
    rgba(15, 19, 38, 0.88);
}

.quote-card blockquote {
  margin: 0;
  line-height: 1.8;
  color: var(--text);
}

.quote-card footer {
  margin-top: 14px;
  color: var(--muted);
}

.download-band {
  margin: 44px 0 8px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background:
    radial-gradient(circle at 12% 18%, rgba(255, 122, 24, 0.2), transparent 34%),
    linear-gradient(135deg, rgba(255, 122, 24, 0.18), rgba(124, 58, 237, 0.16));
  padding: 24px 24px 26px;
}

.download-band .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.download-band h2 {
  margin: 0 0 8px;
}

.download-band p {
  color: rgba(255, 255, 255, 0.78);
}

.content-wrap {
  padding: 36px 0 20px;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: 18px;
  align-items: start;
}

.content-card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
    rgba(14, 18, 34, 0.88);
  box-shadow: var(--shadow);
  padding: 28px;
}

.content-card h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  line-height: 1.02;
}

.content-card > p {
  font-size: 1.02rem;
}

.content-text {
  margin-top: 22px;
}

.content-text h2 {
  margin: 24px 0 14px;
  font-size: 1.4rem;
}

.content-text h3 {
  margin: 20px 0 10px;
  font-size: 1.08rem;
}

.content-text ul,
.content-text ol {
  margin: 0;
  padding-left: 20px;
  line-height: 1.85;
}

.content-text li + li {
  margin-top: 8px;
}

.timeline {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.step-card {
  border-radius: var(--radius-lg);
  padding: 20px 20px 20px 22px;
  background:
    linear-gradient(145deg, rgba(255, 122, 24, 0.12), rgba(124, 58, 237, 0.08)),
    rgba(15, 19, 38, 0.86);
}

.step-card .step-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), #ff984f);
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.sidebar {
  display: grid;
  gap: 14px;
}

.sidebar-card {
  border-radius: var(--radius-lg);
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
    rgba(15, 19, 38, 0.84);
}

.sidebar-card ul {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.8;
}

.faq-grid {
  gap: 12px;
}

.faq-card {
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
    rgba(15, 19, 38, 0.86);
}

.faq-card summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-card summary::-webkit-details-marker {
  display: none;
}

.faq-card summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: rgba(255, 122, 24, 0.16);
  border: 1px solid rgba(255, 122, 24, 0.3);
}

.faq-card[open] summary::after {
  content: "−";
}

.faq-card .faq-body {
  padding: 0 20px 18px;
}

.faq-list {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.site-footer {
  padding: 24px 0 42px;
  color: rgba(246, 240, 231, 0.72);
}

.site-footer .footer-card {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 18px;
  font-size: 0.95rem;
  line-height: 1.9;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 10px 0 14px;
}

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

.muted {
  color: var(--muted);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.kicker {
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  color: #ffddb8;
  text-transform: uppercase;
}

.stack-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.stack-line .meta-pill {
  background: rgba(255, 255, 255, 0.04);
}

.content-intro {
  display: grid;
  gap: 12px;
}

.panel-label {
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  color: #ffddb8;
  text-transform: uppercase;
  margin-bottom: 10px;
}

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

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

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-size: 0.9rem;
}

.anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.anchor-list a {
  color: var(--text);
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

@media (max-width: 1080px) {
  .hero-grid,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid,
  .feature-grid,
  .quote-grid,
  .link-grid,
  .subgrid,
  .note-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .shot-card.wide,
  .shot-card.narrow,
  .shot-card.large {
    grid-column: span 6;
  }
}

@media (max-width: 760px) {
  .page-wrap {
    width: min(100% - 20px, var(--max));
  }

  .site-header .page-wrap {
    flex-wrap: wrap;
  }

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

  .nav-links {
    width: 100%;
    display: none;
    padding: 8px 0 0;
  }

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

  .nav-links a {
    width: 100%;
    text-align: center;
  }

  .nav-links .btn {
    width: 100%;
  }

  .stats-grid,
  .feature-grid,
  .quote-grid,
  .link-grid,
  .subgrid,
  .note-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 28px;
  }

  .hero-copy,
  .content-card,
  .download-band,
  .sidebar-card,
  .feature-card,
  .quote-card,
  .link-card,
  .stat-card,
  .step-card,
  .faq-card {
    border-radius: 20px;
  }

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

  .download-band .inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-title {
    align-items: start;
    flex-direction: column;
  }

  .shot-card.wide,
  .shot-card.narrow,
  .shot-card.large {
    grid-column: span 1;
  }
}