:root {
  --blue: #1a6dcc;
  --blue-deep: #0f4f9a;
  --ink: #1c2430;
  --muted: #5b6775;
  --paper: #f3f6fa;
  --line: rgba(26, 109, 204, 0.12);
  --serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(26, 109, 204, 0.12), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(22, 163, 74, 0.08), transparent 50%),
    linear-gradient(180deg, #eef3f9 0%, #f7f9fc 40%, #ffffff 100%);
  min-height: 100vh;
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 6vw;
  backdrop-filter: blur(12px);
  background: rgba(247, 249, 252, 0.86);
  border-bottom: 1px solid rgba(28, 36, 48, 0.06);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: block;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--blue-deep);
}

.site-nav {
  display: flex;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
}

.site-nav a:hover { color: var(--blue); }

.hero {
  position: relative;
  min-height: min(88vh, 820px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: #fff;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(15, 79, 154, 0.92) 0%, rgba(26, 109, 204, 0.78) 48%, rgba(12, 58, 110, 0.88) 100%),
    repeating-linear-gradient(
      -12deg,
      rgba(255, 255, 255, 0.045) 0 2px,
      transparent 2px 14px
    ),
    radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.18), transparent 40%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -20%;
  width: 58vw;
  max-width: 680px;
  height: 58vw;
  max-height: 680px;
  border-radius: 40% 60% 55% 45%;
  background: rgba(255, 255, 255, 0.06);
  transform: rotate(18deg);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(920px, 100%);
  padding: 12vh 6vw 10vh;
  animation: rise 0.8s ease both;
}

.hero-brand {
  font-family: var(--serif);
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.1;
  margin-bottom: 18px;
  text-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
  animation: rise 0.9s 0.05s ease both;
}

.hero-title {
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 500;
  max-width: 16em;
  margin-bottom: 14px;
  animation: rise 0.9s 0.12s ease both;
}

.hero-desc {
  font-size: clamp(15px, 2vw, 18px);
  max-width: 34em;
  opacity: 0.92;
  margin-bottom: 28px;
  animation: rise 0.9s 0.18s ease both;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  animation: rise 0.9s 0.24s ease both;
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background: #fff;
  color: var(--blue-deep);
}

.btn-primary:hover { transform: translateY(-1px); background: #f2f7ff; }

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: #fff;
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); }

.section {
  padding: 72px 6vw;
  max-width: 1080px;
  margin: 0 auto;
}

.section-alt {
  max-width: none;
  background: rgba(255, 255, 255, 0.65);
  border-block: 1px solid var(--line);
}

.section-alt .section-title,
.section-alt .section-desc,
.section-alt .scene-list {
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 6vw;
  padding-right: 6vw;
}

.section-alt .section-title,
.section-alt .section-desc {
  padding-left: 6vw;
  padding-right: 6vw;
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 36px);
  margin-bottom: 8px;
}

.section-desc {
  color: var(--muted);
  margin-bottom: 36px;
}

.flow-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.flow-list li {
  padding-top: 8px;
  border-top: 2px solid var(--blue);
}

.flow-num {
  display: block;
  font-family: var(--serif);
  color: var(--blue);
  font-size: 28px;
  margin-bottom: 10px;
}

.flow-list strong {
  display: block;
  font-size: 18px;
  margin-bottom: 8px;
}

.flow-list p { color: var(--muted); font-size: 14px; }

.scene-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 28px;
  padding-bottom: 8px;
}

.scene-list li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
  font-weight: 600;
}

.scene-list span {
  font-size: 14px;
  font-weight: 400;
  color: var(--muted);
}

.notice-block {
  display: grid;
  gap: 12px;
  color: var(--muted);
  font-size: 15px;
  max-width: 720px;
}

.section-cta { text-align: left; }

.mini-box {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: 520px;
  padding: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
}

.mini-code {
  width: 96px;
  height: 96px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #e8f1fb, #ffffff);
  border: 1px solid var(--line);
  flex-shrink: 0;
}

.mini-name {
  font-family: var(--serif);
  font-size: 24px;
  margin-bottom: 4px;
}

.mini-tip { color: var(--muted); font-size: 14px; }

.site-footer {
  padding: 28px 6vw 40px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid rgba(28, 36, 48, 0.06);
}

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

@media (max-width: 800px) {
  .site-nav { display: none; }
  .flow-list { grid-template-columns: 1fr; }
  .scene-list { grid-template-columns: 1fr; }
  .hero { min-height: 78vh; align-items: center; }
  .hero-inner { padding-top: 18vh; padding-bottom: 8vh; }
}