:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --surface-soft: #fbfbfd;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --accent: #0071e3;
  --accent-dark: #005bb5;
  --success: #00875a;
  --danger: #d62f2f;
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --shadow-soft: 0 18px 50px rgba(0, 0, 0, 0.08);
  --max-width: 1240px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "SF Pro Display", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
}

body.motion-ready {
  overflow-x: clip;
}

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

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

.container {
  width: min(var(--max-width), 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 252, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(210, 210, 215, 0.75);
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.site-header.scrolled {
  background: rgba(250, 250, 252, 0.9);
  border-bottom-color: rgba(210, 210, 215, 0.95);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.header-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

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

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  flex: 0 0 auto;
}

.brand-text {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.menu-btn {
  display: none;
  border: none;
  background: transparent;
  padding: 8px;
  cursor: pointer;
}

.menu-btn span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text);
  margin: 4px 0;
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  display: inline-block;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  transition: all 0.25s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text);
  background: rgba(0, 113, 227, 0.09);
}

.hero {
  padding: 112px 0 92px;
  background:
    radial-gradient(900px 480px at 0% -10%, rgba(0, 113, 227, 0.14) 0%, rgba(0, 113, 227, 0) 65%),
    radial-gradient(700px 360px at 100% 10%, rgba(149, 76, 233, 0.1) 0%, rgba(149, 76, 233, 0) 65%),
    var(--bg);
  --hero-shift: 0px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  transform: translateY(var(--hero-shift));
  transition: transform 0.12s linear;
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(40px, 5vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.hero p {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 20px);
  max-width: 680px;
}

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: #fff;
  color: var(--text);
  border-radius: 999px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn.primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.panel,
.card,
.table-wrap,
.timeline,
.notice {
  background: var(--surface);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
}

.hero-card {
  padding: 26px;
  animation: floatCard 7s ease-in-out infinite;
}

.kpi-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.kpi-item {
  background: linear-gradient(180deg, #ffffff 0%, #f8f9fb 100%);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-md);
  padding: 16px;
}

.kpi-item strong {
  display: block;
  font-size: 30px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #111827;
}

.kpi-item span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 96px 0;
}

main .section:nth-of-type(even) {
  background: var(--surface-soft);
}

.section h2 {
  margin: 0 0 12px;
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.024em;
}

.section .lead {
  margin: 0 0 32px;
  max-width: 860px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.55;
}

.grid-2,
.grid-3,
.grid-4,
.form-row,
.footer-grid {
  display: grid;
  gap: 18px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  padding: 28px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.12);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.card h4 {
  margin: 0 0 6px;
  font-size: 18px;
}

.card p,
.timeline-item p,
.notice,
.form-note,
.footer-links a,
.site-footer p {
  margin: 0;
  color: var(--muted);
}

.card p + p,
.site-footer p + p {
  margin-top: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  margin-bottom: 12px;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #1d4ed8;
  background: rgba(0, 113, 227, 0.1);
}

.cta {
  padding: 110px 0;
  background:
    radial-gradient(680px 340px at 10% 0%, rgba(0, 113, 227, 0.28) 0%, rgba(0, 113, 227, 0) 70%),
    linear-gradient(135deg, #111114 0%, #1d1d22 54%, #101012 100%);
  color: #f5f5f7;
}

.cta .lead {
  color: rgba(245, 245, 247, 0.84);
}

.cta .btn {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #f5f5f7;
}

.cta .btn.primary {
  border-color: #2997ff;
  background: #2997ff;
  color: #fff;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 15px 18px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  font-size: 14px;
}

th {
  font-weight: 600;
  color: #1f2937;
  background: #fafafc;
}

.timeline {
  border-left: 0;
  padding: 26px;
}

.timeline-item {
  position: relative;
  margin-bottom: 26px;
  padding-left: 20px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #0071e3;
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
}

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

label {
  display: block;
  margin-bottom: 7px;
  font-size: 13px;
  color: #4b5563;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 14px;
  padding: 11px 14px;
  font: inherit;
  background: #fff;
  transition: all 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(0, 113, 227, 0.44);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.14);
}

.error {
  margin-top: 5px;
  min-height: 16px;
  color: var(--danger);
  font-size: 12px;
}

.form-note {
  font-size: 13px;
  line-height: 1.6;
}

.toast {
  display: none;
  margin-top: 8px;
  color: var(--success);
  font-size: 13px;
}

.site-footer {
  margin-top: 0;
  padding: 52px 0 46px;
  border-top: 1px solid rgba(210, 210, 215, 0.75);
  background: #f5f5f7;
  font-size: 14px;
}

.footer-grid {
  grid-template-columns: 2fr 1fr 1fr;
}

.footer-links a {
  display: block;
  margin-bottom: 10px;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #1f2937;
}

.notice {
  margin-top: 20px;
  border-style: dashed;
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  font-size: 13px;
}

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(26px) scale(0.985);
  transition: opacity 0.72s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.78s cubic-bezier(0.22, 0.61, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: transform, opacity;
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.hero h1.reveal-on-scroll {
  transform: translateY(32px) scale(0.98);
}

.hero h1.reveal-on-scroll.is-visible {
  transform: translateY(0) scale(1);
}

.brand-logo {
  animation: logoBreathe 5.8s ease-in-out infinite;
}

@keyframes floatCard {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-7px);
  }
}

@keyframes logoBreathe {
  0%,
  100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-2px) scale(1.02);
  }
}

@media (max-width: 1100px) {
  .brand-text {
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero-grid,
  .grid-4,
  .grid-3,
  .grid-2,
  .form-row,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 86px;
  }

  .hero-grid {
    transform: none;
  }
}

@media (max-width: 900px) {
  .menu-btn {
    display: inline-block;
  }

  .main-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 64px;
    padding: 10px 4% 12px;
    background: rgba(250, 250, 252, 0.95);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(210, 210, 215, 0.8);
  }

  .main-nav.open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .main-nav a {
    width: 100%;
    text-align: center;
    padding: 10px 12px;
    border-radius: 12px;
  }

  .hero h1 {
    font-size: clamp(34px, 9vw, 50px);
  }

  .section {
    padding: 72px 0;
  }

  .cta {
    padding: 86px 0;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(var(--max-width), 94%);
  }

  .brand-logo {
    width: 30px;
    height: 30px;
  }

  .brand-text {
    font-size: 13px;
    max-width: 180px;
  }

  .card,
  .timeline,
  .hero-card {
    padding: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }

  .reveal-on-scroll {
    opacity: 1;
    transform: none;
  }
}