:root {
  --bg: #f6f3ea;
  --ink: #14302f;
  --muted: #4f6766;
  --card: #fffdf8;
  --line: #d7d1c4;
  --accent: #0b7f66;
  --accent-2: #e87d3f;
  --danger: #b11f2e;
  --warn: #b86a00;
  --ok: #1c7d3f;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 18%, #d8efd9 0, transparent 36%),
    radial-gradient(circle at 86% 12%, #f8d3b7 0, transparent 32%),
    radial-gradient(circle at 52% 88%, #d8e7f8 0, transparent 35%),
    linear-gradient(140deg, #f6f3ea, #fffaf0);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 1.2rem;
  background: rgba(255, 253, 248, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-decoration: none;
}

nav a {
  margin-left: 1rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.94rem;
}

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.4rem;
}

.hero {
  margin-top: 1rem;
  padding: 2rem 1.2rem;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 22px;
}

.kicker {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.09em;
  font-size: 0.8rem;
}

h1,
h2,
h3 {
  margin: 0.3rem 0 0.8rem;
  line-height: 1.2;
}

h1 {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
}

h2 {
  font-size: clamp(1.2rem, 3vw, 1.7rem);
}

.hero p {
  max-width: 66ch;
}

.cta {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.72rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

.panel,
.grid article {
  margin-top: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
  padding: 1.2rem;
}

.panel-lead,
.muted {
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 0.6rem;
  margin: 1rem 0;
}

.tab {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.48rem 0.9rem;
  cursor: pointer;
}

.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.mode {
  display: none;
}

.mode.active {
  display: block;
}

.form-block {
  display: grid;
  gap: 0.7rem;
}

textarea,
input,
select,
button {
  font: inherit;
}

textarea,
input,
select {
  width: 100%;
  border: 1px solid var(--line);
  background: #fffefb;
  border-radius: 12px;
  padding: 0.75rem;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
  font-weight: 700;
  background: var(--accent-2);
  color: #1f1c15;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.result pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: #f7f2e7;
  padding: 0.8rem;
  border-radius: 12px;
  border: 1px solid var(--line);
}

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

ul {
  padding-left: 1.2rem;
}

.risk-chip {
  display: inline-block;
  padding: 0.2rem 0.52rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
}

.risk-high {
  background: #f8d7db;
  color: var(--danger);
}

.risk-mid {
  background: #fae8d0;
  color: var(--warn);
}

.risk-low {
  background: #d8eedf;
  color: var(--ok);
}

.footer {
  margin: 2rem auto 2.4rem;
  max-width: 980px;
  color: var(--muted);
  text-align: center;
  font-size: 0.92rem;
  padding: 0 1.2rem;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.65s ease forwards;
}

.reveal:nth-of-type(2) {
  animation-delay: 0.08s;
}

.reveal:nth-of-type(3) {
  animation-delay: 0.14s;
}

.reveal:nth-of-type(4) {
  animation-delay: 0.2s;
}

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

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

  .topbar {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  nav {
    width: 100%;
    display: flex;
    justify-content: space-around;
  }

  nav a {
    margin: 0;
  }

  .form-row {
    flex-direction: column;
    align-items: stretch;
  }
}