:root {
  --mint: #4db6a0;
  --mint-dark: #2f8f7d;
  --mint-soft: #e7f7f2;
  --sky: #4f9fd0;
  --sky-soft: #eaf5fb;
  --ink: #1c3532;
  --muted: #5b736f;
  --line: #d5e8e2;
  --card: #ffffff;
  --bg: #f3faf8;
  --warn: #c9843a;
  --danger: #c45c5c;
  --ok: #2f8f7d;
  --shadow: 0 10px 30px rgba(47, 143, 125, 0.08);
  --radius: 16px;
  --nav-h: 68px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
}

a {
  color: var(--mint-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--nav-h);
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  flex-shrink: 0;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--mint), var(--sky));
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}

.site-nav a {
  color: var(--muted);
  font-size: 14px;
  padding: 6px 0;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--mint-dark);
  border-bottom-color: var(--mint);
}

main {
  flex: 1;
}

.hero {
  background: linear-gradient(135deg, #dff6ef 0%, #eaf6fb 55%, #f7fffb 100%);
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.25;
}

.hero p {
  margin: 0 0 24px;
  color: var(--muted);
  max-width: 680px;
  font-size: 17px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--mint-dark);
  color: #fff;
}

.btn-primary:hover {
  background: #267567;
}

.btn-ghost {
  background: #fff;
  color: var(--mint-dark);
  border: 1px solid var(--line);
}

.btn-danger {
  background: #fdecec;
  color: var(--danger);
}

.section {
  padding: 40px 0;
}

.section h2 {
  margin: 0 0 8px;
  font-size: 24px;
}

.lead {
  color: var(--muted);
  margin: 0 0 24px;
}

.grid {
  display: grid;
  gap: 16px;
}

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

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

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 8px;
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--mint-soft);
  color: var(--mint-dark);
  display: grid;
  place-items: center;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-head {
  padding: 36px 0 8px;
}

.page-head h1 {
  margin: 0 0 8px;
  font-size: 32px;
}

.badge {
  display: inline-block;
  background: var(--mint-soft);
  color: var(--mint-dark);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 12px;
  margin-right: 6px;
}

.progress-wrap {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}

.progress-bar {
  height: 12px;
  background: var(--mint-soft);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--mint), var(--sky));
  transition: width 0.3s ease;
}

.phase {
  margin-bottom: 28px;
}

.day {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 12px;
}

.day.done {
  border-color: var(--mint);
  background: #f7fffb;
}

.day-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.tasks {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.tasks li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin: 8px 0;
}

.form-row,
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

label {
  font-weight: 600;
  font-size: 14px;
}

input,
select,
textarea {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}

textarea {
  min-height: 96px;
  resize: vertical;
}

.search-box {
  width: 100%;
  margin-bottom: 18px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.chip {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 13px;
}

.chip.active {
  background: var(--mint-dark);
  color: #fff;
  border-color: var(--mint-dark);
}

.food-item,
.wiki-item,
.post,
.log-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 12px;
}

.quiz-screen {
  display: none;
}

.quiz-screen.active {
  display: block;
}

.options {
  display: grid;
  gap: 10px;
}

.option {
  display: block;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  padding: 12px 14px;
  cursor: pointer;
  text-align: left;
}

.option.selected,
.option:hover {
  border-color: var(--mint);
  background: var(--mint-soft);
}

.result-box {
  text-align: center;
  padding: 28px 16px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat {
  background: var(--sky-soft);
  border-radius: 14px;
  padding: 16px;
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 28px;
  color: var(--mint-dark);
}

.article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.article h2 {
  margin-top: 28px;
}

.site-footer {
  margin-top: 40px;
  background: #163530;
  color: #d7ece7;
  padding: 28px 0;
}

.site-footer a {
  color: #b7e6db;
}

.disclaimer {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 12px 14px;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
}

.empty {
  color: var(--muted);
  padding: 16px 0;
}

.hidden {
  display: none !important;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: var(--nav-h);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 10px 14px 14px;
    flex-direction: column;
  }

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

  .grid-3,
  .grid-2,
  .stat-grid {
    grid-template-columns: 1fr;
  }
}