:root {
  --bg-a: #ffffff;
  --bg-b: #f7f7f7;
  --ink: #1a1a1a;
  --ink-soft: #3d3d3d;
  --muted: #6b6b6b;
  --line: #e8e8e8;
  --card: #ffffff;
  --brand: #d4a017;
  --brand-mid: #e6b82a;
  --brand-light: #f5c542;
  --accent: #f5c542;
  --accent-ink: #2a220c;
  --shadow: 0 12px 28px -12px rgba(0, 0, 0, 0.08);
  --radius: 26px;
  --max: 1160px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #ffffff;
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
}

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

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

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  border-radius: 48px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #d4a017, #f0c44a);
  color: #2a220c;
  box-shadow: 0 8px 18px rgba(212, 160, 23, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #e6b82a, #f5c542);
  transform: translateY(-2px);
}

.btn-outline {
  background: #ffffff;
  border: 1.5px solid #d0d0d0;
  color: var(--ink);
}

.btn-outline:hover {
  border-color: var(--brand-mid);
  color: #8a6208;
  background: #fffdf5;
  transform: translateY(-2px);
}

.btn-download {
  background: linear-gradient(135deg, #f0c44a, #f5c542);
  color: var(--accent-ink);
  box-shadow: 0 8px 20px rgba(212, 160, 23, 0.3);
}

.btn-download:hover {
  background: linear-gradient(135deg, #f5c542, #ffd666);
  transform: scale(1.02);
}

.site-header {
  padding: 18px 0 8px;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.4px;
  background: linear-gradient(135deg, #d4a017, #f0c44a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo em {
  font-style: normal;
  font-weight: 500;
  font-size: 0.95rem;
  color: #b8860b;
  margin-left: 6px;
  -webkit-background-clip: initial;
  background: none;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
  flex-wrap: wrap;
}

.nav-links a {
  font-weight: 500;
  color: #333333;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #d4a017;
}

.nav-toggle {
  display: none;
  background: #ffffff;
  border: 1.5px solid #d0d0d0;
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
  color: #333333;
  font-weight: 600;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  padding: 36px 0 56px;
}

.hero-badge {
  display: inline-block;
  background: #fff8e6;
  padding: 6px 16px;
  border-radius: 40px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #b8860b;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2rem, 4.2vw, 3.05rem);
  font-weight: 800;
  line-height: 1.22;
  margin-bottom: 18px;
  color: var(--ink);
}

.hero-highlight {
  background: linear-gradient(120deg, #d4a017, #f5c542);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: 1.12rem;
  color: var(--ink-soft);
  max-width: 540px;
  margin-bottom: 28px;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 28px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.stat-item strong {
  display: block;
  font-size: 1.7rem;
  font-weight: 800;
  color: #d4a017;
  line-height: 1.2;
}

.stat-item span {
  font-size: 0.9rem;
  color: var(--muted);
}

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

.visual-card {
  width: min(100%, 380px);
  aspect-ratio: 1;
  border-radius: 48px;
  background:
    radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.35), transparent 55%),
    linear-gradient(160deg, #d4a017 0%, #f0c44a 55%, #ffd666 100%);
  box-shadow: 0 28px 50px -20px rgba(212, 160, 23, 0.35);
  position: relative;
  overflow: hidden;
  animation: floatY 5.5s ease-in-out infinite;
}

.visual-card::before {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.18);
  animation: pulseRing 3.2s ease-in-out infinite;
}

.visual-card::after {
  content: "闪";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 5.5rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.08em;
}

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

@keyframes pulseRing {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.08); opacity: 1; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  animation: fadeUp 0.7s ease both;
}

.reveal-delay {
  animation-delay: 0.15s;
}

.section {
  padding: 28px 0 48px;
}

.section-title {
  text-align: center;
  font-size: clamp(1.7rem, 3vw, 2.15rem);
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--ink);
}

.section-sub {
  text-align: center;
  color: var(--muted);
  max-width: 680px;
  margin: 0 auto 40px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 22px;
}

.feature-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px 22px;
  box-shadow: var(--shadow);
  border: 1px solid #eeeeee;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 36px -16px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  background: #fff8e6;
  color: #d4a017;
  font-size: 1.35rem;
  font-weight: 700;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: #555555;
  font-size: 0.98rem;
}

.function-showcase {
  background: #ffffff;
  border-radius: 40px;
  padding: 42px 36px;
  margin: 20px 0 40px;
  box-shadow: var(--shadow);
  border: 1px solid #eeeeee;
}

.function-flex {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 36px;
  align-items: center;
}

.function-text h3 {
  font-size: 1.7rem;
  margin-bottom: 12px;
}

.function-text > p {
  color: var(--muted);
  margin-bottom: 8px;
}

.function-list {
  list-style: none;
  margin-top: 20px;
}

.function-list li {
  margin-bottom: 14px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-weight: 500;
}

.check {
  flex-shrink: 0;
  background: #fff8e6;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #d4a017;
  font-weight: 700;
  font-size: 0.85rem;
}

.side-panel {
  background: linear-gradient(160deg, #d4a017, #f0c44a);
  color: #2a220c;
  border-radius: 28px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 18px 36px -16px rgba(212, 160, 23, 0.35);
}

.side-panel strong {
  display: block;
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.side-panel p {
  opacity: 0.88;
  font-size: 0.95rem;
  margin-bottom: 18px;
}

.faq-grid {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card);
  border-radius: 20px;
  margin-bottom: 12px;
  padding: 4px 22px 10px;
  border: 1px solid #eeeeee;
}

.faq-question {
  font-weight: 700;
  font-size: 1.08rem;
  padding: 18px 0 8px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  list-style: none;
}

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

.faq-icon {
  font-size: 1.4rem;
  font-weight: 300;
  color: #d4a017;
  transition: transform 0.2s;
}

details[open] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  color: var(--muted);
  padding-bottom: 16px;
}

.cta-download {
  background: linear-gradient(130deg, #d4a017 0%, #f0c44a 55%, #ffd666 100%);
  border-radius: 40px;
  padding: 52px 36px;
  text-align: center;
  margin: 24px 0 56px;
  color: #2a220c;
}

.cta-download h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin-bottom: 12px;
}

.cta-download > p {
  opacity: 0.88;
  margin-bottom: 28px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.small-note {
  font-size: 0.78rem;
  margin-top: 18px;
  opacity: 0.72;
}

.page-hero {
  padding: 28px 0 20px;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  margin-bottom: 10px;
}

.page-hero p {
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto;
}

.article-list {
  display: grid;
  gap: 18px;
  margin: 20px 0 50px;
}

.article-card {
  background: var(--card);
  border-radius: 22px;
  padding: 24px 26px;
  border: 1px solid #eeeeee;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease;
}

.article-card:hover {
  transform: translateY(-3px);
}

.article-card .meta {
  font-size: 0.85rem;
  color: #d4a017;
  margin-bottom: 8px;
}

.article-card h2 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.article-card h2 a:hover {
  color: #d4a017;
}

.article-card p {
  color: var(--muted);
  margin-bottom: 12px;
}

.article-body {
  background: var(--card);
  border-radius: 28px;
  padding: 36px 32px;
  box-shadow: var(--shadow);
  border: 1px solid #eeeeee;
  margin-bottom: 40px;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.article-body .meta {
  color: #d4a017;
  font-size: 0.9rem;
  margin-bottom: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
}

.update-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  background: #fff8e6;
  color: #b8860b;
  font-size: 0.78rem;
  font-weight: 600;
}

.article-body h1 {
  font-size: 1.85rem;
  margin-bottom: 18px;
  line-height: 1.35;
}

.article-body h2 {
  font-size: 1.25rem;
  margin: 28px 0 12px;
}

.article-body p {
  color: #444444;
  margin-bottom: 14px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 16px 1.2em;
  color: #444444;
}

.article-body li {
  margin-bottom: 8px;
}

.article-cta {
  text-align: center;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.daily-box {
  margin: 28px 0 0;
  padding: 20px 22px;
  border-radius: 18px;
  background: #fffdf8;
  border: 1px dashed #e6c86a;
}

.daily-box .daily-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: #d4a017;
  margin-bottom: 8px;
}

.daily-box p {
  margin-bottom: 0;
  color: var(--ink-soft);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin: 28px 0 48px;
}

.download-card {
  background: var(--card);
  border-radius: 24px;
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid #eeeeee;
}

.download-card .plat {
  font-size: 1.15rem;
  font-weight: 800;
  color: #d4a017;
  margin-bottom: 10px;
  letter-spacing: 0.04em;
}

.download-card h3 {
  margin-bottom: 8px;
}

.download-card p {
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 18px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin: 24px 0 48px;
}

.step-card {
  background: var(--card);
  border-radius: 22px;
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid #eeeeee;
}

.step-card .num {
  display: inline-flex;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  background: #fff8e6;
  color: #d4a017;
  font-weight: 800;
  margin-bottom: 12px;
}

.step-card h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.step-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

.sitemap-list {
  background: var(--card);
  border-radius: 24px;
  padding: 28px 30px;
  box-shadow: var(--shadow);
  margin-bottom: 50px;
  border: 1px solid #eeeeee;
}

.sitemap-list h2 {
  font-size: 1.15rem;
  margin: 18px 0 10px;
  color: #1a1a1a;
}

.sitemap-list ul {
  list-style: none;
}

.sitemap-list li {
  margin-bottom: 8px;
}

.sitemap-list a {
  color: #d4a017;
  font-weight: 500;
}

.sitemap-list a:hover {
  text-decoration: underline;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 28px;
  color: #777777;
  font-size: 0.88rem;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 22px;
}

.footer-links a:hover {
  color: #d4a017;
}

.footer-copy {
  text-align: center;
  padding-top: 12px;
  border-top: 1px solid #eeeeee;
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 20px;
  }

  .hero-visual {
    order: -1;
  }

  .visual-card {
    width: min(100%, 280px);
  }

  .function-flex {
    grid-template-columns: 1fr;
  }

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

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 8px 0 12px;
  }

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

  .article-body {
    padding: 26px 20px;
  }

  .function-showcase {
    padding: 28px 20px;
  }
}