/* ============================================================
   style.css — 多肉植物馆 · 首页版式
   依赖 tokens.css（变量）与 components.css（公共组件），三者顺序加载。
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: var(--fs-2);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  height: auto;
}
h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  color: var(--ink);
  font-weight: 600;
  letter-spacing: 0.01em;
}
a {
  color: var(--sage);
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
:target {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

/* ------------------------------------------------------------- 首屏 */
.hero {
  padding: 72px 0 88px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(1200px 480px at 78% -10%, rgba(223, 231, 217, 0.55), transparent 62%),
    var(--bg);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 56px;
  align-items: center;
}
.hero-copy h1 {
  margin: 18px 0 0;
  font-size: var(--fs-7);
  line-height: 1.18;
  letter-spacing: 0;
}
.hero-lead {
  margin: 22px 0 0;
  max-width: 560px;
  font-size: var(--fs-3);
  line-height: 1.9;
  color: var(--ink-soft);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}
.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 40px;
  margin: 38px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}
.hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-facts .num {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--ink);
  line-height: 1.2;
}
.hero-facts .label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.hero-figure {
  margin: 0;
  position: relative;
}
.hero-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-2);
  box-shadow: var(--shadow-2);
  background: var(--surface-2);
}
.hero-figure figcaption {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}
.hero-figure figcaption::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--line);
}

/* ------------------------------------------------------------- 三步 */
.starter {
  padding: var(--pad-section) 0;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
}
.starter-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
}
.step {
  padding: 4px 36px 4px 0;
  border-left: 1px solid var(--line);
  padding-left: 32px;
}
.step:first-child {
  border-left: 0;
  padding-left: 0;
}
.step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--accent);
}
.step h3 {
  margin: 12px 0 10px;
  font-size: 22px;
  line-height: 1.4;
}
.step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------- 分类索引 */
.categories {
  padding: var(--pad-section) 0;
}
.cat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}
.cat-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}
.cat-card:hover,
.cat-card:focus-visible {
  border-color: var(--sage);
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}
.cat-media {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--surface-2);
}
.cat-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.cat-body {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.cat-top {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.cat-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.cat-name {
  font-family: var(--font-serif);
  font-size: 21px;
  color: var(--ink);
}
.cat-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}
.cat-count {
  margin-top: auto;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ------------------------------------------------------------- 精选 */
.featured {
  padding: var(--pad-section) 0;
  background: var(--bg-2);
  border-block: 1px solid var(--line);
}
.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

/* ------------------------------------------------------------- 四季表 */
.seasons {
  padding: var(--pad-section) 0;
}
.seasons .table-wrap {
  margin-top: 8px;
}

/* ------------------------------------------------------------- 信号 */
.signals {
  padding: var(--pad-section) 0;
  background: var(--bg-2);
  border-block: 1px solid var(--line);
}
.signal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.signal {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left-width: 4px;
  border-radius: var(--r-1);
  padding: 22px 24px;
}
.signal h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.5;
}
.signal p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}
.signal[data-tone="dry"] {
  border-left-color: var(--state-dry);
}
.signal[data-tone="water"] {
  border-left-color: var(--state-water);
}
.signal[data-tone="rot"] {
  border-left-color: var(--state-rot);
}
.signal[data-tone="stretch"] {
  border-left-color: var(--state-stretch);
}

/* ------------------------------------------------------------- 避坑 */
.mistakes {
  padding: var(--pad-section) 0;
}
.mistake-list {
  border-top: 1px solid var(--line);
}
.mistake {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 12px 24px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
}
.mistake-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.1em;
  padding-top: 4px;
}
.mistake h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.5;
}
.mistake p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------- FAQ */
.faq {
  padding: var(--pad-section) 0;
  background: var(--bg-2);
  border-top: 1px solid var(--line);
}
.faq .faq-list {
  max-width: 820px;
}

/* ------------------------------------------------------------- 响应式 */
@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-copy h1 {
    font-size: clamp(36px, 5.4vw, 52px);
  }
  .hero-figure {
    max-width: 720px;
  }
  .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .featured-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .featured-grid .card:last-child {
    grid-column: span 2;
  }
  .step {
    padding-right: 24px;
  }
}
@media (max-width: 860px) {
  .starter-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .step,
  .step:first-child {
    border-left: 0;
    padding: 0 0 24px;
    border-bottom: 1px solid var(--line);
  }
  .step:last-child {
    border-bottom: 0;
    padding-bottom: 0;
  }
  .signal-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 760px) {
  .hero {
    padding: 44px 0 56px;
  }
  .hero-lead {
    font-size: 15px;
  }
  .hero-facts {
    gap: 10px 28px;
  }
  .hero-actions .btn {
    flex: 1 1 auto;
  }
  .cat-grid {
    grid-template-columns: 1fr;
  }
  .featured-grid {
    grid-template-columns: 1fr;
  }
  .featured-grid .card:last-child {
    grid-column: auto;
  }
  .mistake {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 6px 12px;
  }
  .section-head h2 {
    font-size: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}