:root {
  --bg: #ffffff;
  --panel: #f8fafc;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --primary: #1d4ed8;
  --accent: #14b8a6;
  --danger: #b91c1c;
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.08);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 50% -20%, rgba(20, 184, 166, 0.12), transparent 60%),
    radial-gradient(1200px 600px at 20% 0%, rgba(29, 78, 216, 0.12), transparent 55%),
    var(--bg);
}

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

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: white;
}

.skip:focus {
  left: 12px;
}

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 240px;
}

.logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: var(--shadow);
}

.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name strong {
  font-size: 14px;
  letter-spacing: 0.2px;
}

.brand-name span {
  font-size: 12px;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-link {
  font-size: 14px;
  color: var(--muted);
  padding: 10px 10px;
  border-radius: 12px;
  transition: background 120ms ease, color 120ms ease;
}

.nav-link:hover {
  background: rgba(15, 23, 42, 0.05);
  color: var(--text);
}

.nav-link[aria-current='page'] {
  background: rgba(29, 78, 216, 0.1);
  color: var(--primary);
}

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

.select {
  appearance: none;
  border: 1px solid var(--border);
  background: white;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 14px;
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 14px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease, border-color 120ms ease;
  user-select: none;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #2563eb);
  color: white;
  box-shadow: 0 12px 30px rgba(29, 78, 216, 0.22);
}

.btn-primary:hover {
  box-shadow: 0 14px 34px rgba(29, 78, 216, 0.28);
}

.btn-secondary {
  background: white;
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: rgba(29, 78, 216, 0.35);
  box-shadow: 0 12px 26px rgba(2, 6, 23, 0.08);
}

.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.hero {
  padding: 56px 0 22px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 24px;
  align-items: stretch;
}

.hero-card {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.12);
  color: #0f766e;
  font-size: 12px;
  border: 1px solid rgba(20, 184, 166, 0.18);
}

.h1 {
  margin: 14px 0 10px;
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: -0.4px;
}

.lead {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}

.bullets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 0;
  margin: 16px 0 0;
  list-style: none;
}

.bullet {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px;
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: 14px;
  background: rgba(248, 250, 252, 0.7);
}

.dot {
  margin-top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  flex: 0 0 auto;
}

.bullet p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
}

.hero-actions {
  margin-top: 18px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.side-illustration {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
}

.illus {
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, 0.8);
  background: linear-gradient(135deg, rgba(29, 78, 216, 0.15), rgba(20, 184, 166, 0.1));
  box-shadow: var(--shadow);
  height: 100%;
  min-height: 260px;
  position: relative;
  overflow: hidden;
}

.illus::before {
  content: '';
  position: absolute;
  inset: -40% -20% auto -10%;
  height: 80%;
  background: radial-gradient(circle at 30% 30%, rgba(29, 78, 216, 0.55), transparent 55%);
  transform: rotate(10deg);
}

.illus::after {
  content: '';
  position: absolute;
  inset: auto -30% -40% -20%;
  height: 90%;
  background: radial-gradient(circle at 55% 55%, rgba(20, 184, 166, 0.55), transparent 55%);
  transform: rotate(-10deg);
}

.section {
  padding: 22px 0;
}

.section-title {
  margin: 0 0 12px;
  font-size: 20px;
  letter-spacing: -0.2px;
}

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

.card {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 10px 28px rgba(2, 6, 23, 0.06);
}

.card h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.card p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.card a {
  color: var(--primary);
  font-size: 14px;
}

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

.badge {
  font-size: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(248, 250, 252, 0.75);
  color: var(--text);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form {
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
}

.label {
  font-size: 13px;
  color: var(--text);
}

.input,
.textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: white;
  border-radius: 12px;
  padding: 11px 12px;
  font-size: 14px;
}

.textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.5;
}

.help {
  font-size: 12px;
  color: var(--muted);
}

.error {
  font-size: 12px;
  color: var(--danger);
}

.toast {
  border-radius: 14px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  padding: 12px;
  font-size: 14px;
}

.toast-success {
  background: rgba(20, 184, 166, 0.1);
  border-color: rgba(20, 184, 166, 0.25);
  color: #0f766e;
}

.toast-error {
  background: rgba(185, 28, 28, 0.06);
  border-color: rgba(185, 28, 28, 0.2);
  color: #991b1b;
}

.footer {
  padding: 26px 0 36px;
  color: var(--muted);
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  background: rgba(255, 255, 255, 0.6);
  margin-top: 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 14px;
}

.small {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .split {
    grid-template-columns: 1fr;
  }
  .brand {
    min-width: auto;
  }
  .nav-links {
    display: none;
  }
  .h1 {
    font-size: 34px;
  }
}