/* ============================================================
   图像生成 · 学习站点样式（单份，配合 tokens.css）
   ============================================================ */

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-fg);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
}

a { color: var(--c-primary); text-decoration: none; }
a:hover { color: var(--c-primary-strong); text-decoration: underline; }

:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 3px;
}

.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 200;
  background: var(--c-primary); color: #fff; padding: 8px 14px;
  border-radius: var(--radius-s);
}
.skip-link:focus { left: 8px; color: #fff; text-decoration: none; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--c-bg-soft) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  max-width: var(--w-max); margin: 0 auto; padding: 0 16px;
  height: var(--header-h);
  display: flex; align-items: center; gap: 14px;
}
.brand {
  font-weight: 700; font-size: 17px; color: var(--c-fg);
  white-space: nowrap; display: flex; align-items: center; gap: 8px;
}
.brand:hover { text-decoration: none; color: var(--c-primary); }
.brand-dot {
  width: 12px; height: 12px; border-radius: 50%; flex: none;
  background: var(--grad-hero);
  box-shadow: 0 0 8px color-mix(in srgb, var(--c-primary) 55%, transparent);
}
.main-nav { display: flex; gap: 2px; }
.main-nav a {
  padding: 6px 12px; border-radius: var(--radius-s);
  color: var(--c-fg-soft); font-size: 14.5px;
}
.main-nav a:hover { background: var(--c-primary-soft); text-decoration: none; color: var(--c-primary-strong); }
.main-nav a[aria-current="page"] { color: var(--c-primary); font-weight: 600; background: var(--c-primary-soft); }

.search-wrap { margin-left: auto; position: relative; }
.search-input {
  width: 210px; padding: 7px 30px 7px 12px;
  border: 1px solid var(--c-border-strong); border-radius: 999px;
  background: var(--c-bg-soft); color: var(--c-fg);
  font-size: 14px; font-family: var(--font-sans);
  transition: width var(--t-med) var(--ease), border-color var(--t-fast);
}
.search-input:focus { width: 260px; border-color: var(--c-primary); outline: none; }
.search-key {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  font-size: 11px; color: var(--c-fg-mute);
  border: 1px solid var(--c-border-strong); border-radius: 4px; padding: 0 5px;
}
.search-panel {
  position: absolute; top: calc(100% + 6px); right: 0; width: 340px; max-height: 420px; overflow: auto;
  background: var(--c-bg-soft); border: 1px solid var(--c-border);
  border-radius: var(--radius-m); box-shadow: var(--shadow-m);
  display: none; z-index: 150; padding: 6px;
}
.search-panel.open { display: block; }
.search-item {
  display: block; padding: 8px 10px; border-radius: var(--radius-s);
  color: var(--c-fg); font-size: 14px;
}
.search-item:hover, .search-item.active { background: var(--c-primary-soft); text-decoration: none; }
.search-item .si-title { font-weight: 600; }
.search-item .si-meta { font-size: 12px; color: var(--c-fg-mute); }
.search-empty { padding: 14px 10px; color: var(--c-fg-mute); font-size: 14px; }

.icon-btn {
  border: 1px solid var(--c-border-strong); background: var(--c-bg-soft);
  color: var(--c-fg-soft); width: 34px; height: 34px; border-radius: 50%;
  cursor: pointer; font-size: 15px; line-height: 1; flex: none;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast);
}
.icon-btn:hover { border-color: var(--c-primary); transform: rotate(15deg); }

/* ---------- 主体布局 ---------- */
main { max-width: var(--w-max); margin: 0 auto; padding: 28px 16px 64px; }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  border-radius: var(--radius-l);
  background:
    radial-gradient(600px 240px at 12% 0%, color-mix(in srgb, var(--c-primary) 26%, transparent), transparent 70%),
    radial-gradient(500px 260px at 88% 20%, color-mix(in srgb, var(--c-warm) 20%, transparent), transparent 70%),
    radial-gradient(520px 300px at 60% 110%, color-mix(in srgb, var(--c-accent) 18%, transparent), transparent 70%),
    var(--c-bg-soft);
  border: 1px solid var(--c-border);
  padding: 44px 40px 38px;
  margin-bottom: 28px;
}
.hero-kicker {
  display: inline-block; font-size: 13px; letter-spacing: 2px;
  color: var(--c-primary); font-weight: 700; margin-bottom: 10px;
}
.hero h1 { font-size: 38px; line-height: 1.25; letter-spacing: 1px; }
.hero h1 .grad-text {
  background: var(--grad-hero);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-sub { margin-top: 12px; max-width: 640px; color: var(--c-fg-soft); font-size: 16.5px; }
.hero-actions { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-noise {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: radial-gradient(color-mix(in srgb, var(--c-fg) 14%, transparent) 1px, transparent 1px);
  background-size: 18px 18px;
  mask-image: linear-gradient(115deg, transparent 55%, #000 100%);
  -webkit-mask-image: linear-gradient(115deg, transparent 55%, #000 100%);
}

.btn {
  display: inline-block; padding: 10px 22px; border-radius: 999px;
  font-size: 15px; font-weight: 600; border: none; cursor: pointer;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-fast);
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary { background: var(--c-primary); color: #fff; box-shadow: var(--shadow-s); }
.btn-primary:hover { background: var(--c-primary-strong); color: #fff; }
[data-theme="dark"] .btn-primary { color: #16121f; }
.btn-ghost { background: transparent; color: var(--c-primary); border: 1.5px solid var(--c-primary); }
.btn-ghost:hover { background: var(--c-primary-soft); color: var(--c-primary-strong); }

/* 统计条 */
.stat-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px; margin-bottom: 28px;
}
.stat-card {
  background: var(--c-bg-soft); border: 1px solid var(--c-border);
  border-radius: var(--radius-m); padding: 16px 18px; box-shadow: var(--shadow-s);
}
.stat-num { font-size: 26px; font-weight: 800; color: var(--c-primary); line-height: 1.2; }
.stat-label { font-size: 13px; color: var(--c-fg-mute); margin-top: 2px; }

/* 进度条 */
.progress-track {
  height: 8px; border-radius: 999px; background: var(--c-bg-sunken);
  border: 1px solid var(--c-border); overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0%;
  background: var(--grad-hero);
  border-radius: 999px;
  transition: width var(--t-med) var(--ease);
}
.progress-line {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 13px; color: var(--c-fg-mute); margin-top: 6px;
}
.progress-line strong { color: var(--c-fg); }

/* ---------- 分区标题 ---------- */
.section { margin-top: 40px; }
.section-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.section-head h2 { font-size: 22px; }
.section-head .sh-note { font-size: 13px; color: var(--c-fg-mute); }

/* ---------- 模块卡片 ---------- */
.module-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 16px; }
.module-card {
  background: var(--c-bg-soft); border: 1px solid var(--c-border);
  border-radius: var(--radius-m); padding: 18px 18px 16px;
  box-shadow: var(--shadow-s);
  transition: transform var(--t-med) var(--ease), box-shadow var(--t-med);
  display: flex; flex-direction: column; gap: 10px;
}
.module-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-m); }
.mc-head { display: flex; align-items: center; gap: 10px; }
.mc-index {
  width: 34px; height: 34px; border-radius: 10px; flex: none;
  display: grid; place-items: center; font-weight: 800; font-size: 15px;
  background: var(--c-primary-soft); color: var(--c-primary);
}
.mc-title { font-size: 17px; font-weight: 700; }
.mc-desc { font-size: 13.5px; color: var(--c-fg-mute); flex: 1; }
.mc-kp-list { display: flex; flex-direction: column; gap: 4px; }
.mc-kp-list a {
  font-size: 13.5px; color: var(--c-fg-soft); display: flex; gap: 8px; align-items: center;
  padding: 3px 6px; border-radius: 5px;
}
.mc-kp-list a:hover { background: var(--c-bg-sunken); text-decoration: none; color: var(--c-primary); }
.lvl-dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.lvl-entry { background: var(--lvl-entry); }
.lvl-core { background: var(--lvl-core); }
.lvl-adv { background: var(--lvl-adv); }
.lvl-frontier { background: var(--lvl-frontier); }
.mc-progress { display: flex; align-items: center; gap: 10px; }
.mc-progress .progress-track { flex: 1; }
.mc-progress .pct { font-size: 12px; color: var(--c-fg-mute); min-width: 64px; text-align: right; }

/* ---------- 难度徽章 ---------- */
.badge {
  display: inline-block; padding: 2px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600; border: 1px solid transparent;
}
.badge-entry { color: var(--lvl-entry); border-color: currentColor; background: color-mix(in srgb, var(--lvl-entry) 10%, transparent); }
.badge-core { color: var(--lvl-core); border-color: currentColor; background: color-mix(in srgb, var(--lvl-core) 10%, transparent); }
.badge-adv { color: var(--lvl-adv); border-color: currentColor; background: color-mix(in srgb, var(--lvl-adv) 10%, transparent); }
.badge-frontier { color: var(--lvl-frontier); border-color: currentColor; background: color-mix(in srgb, var(--lvl-frontier) 10%, transparent); }
.badge-time { color: var(--c-fg-mute); border-color: var(--c-border-strong); }

/* ---------- 知识点详情 ---------- */
.breadcrumb { font-size: 13.5px; color: var(--c-fg-mute); margin-bottom: 14px; }
.breadcrumb a { color: var(--c-fg-mute); }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb .bc-sep { margin: 0 7px; color: var(--c-border-strong); }

.kp-header { margin-bottom: 20px; }
.kp-header h1 { font-size: 30px; line-height: 1.3; margin: 6px 0 12px; }
.kp-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.tag-chip {
  font-size: 12px; color: var(--c-fg-mute);
  background: var(--c-bg-sunken); border: 1px solid var(--c-border);
  padding: 1px 9px; border-radius: 999px;
}

.kp-controls {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  margin: 18px 0; padding: 12px 14px;
  background: var(--c-bg-soft); border: 1px solid var(--c-border);
  border-radius: var(--radius-m);
}
.kp-controls .kc-label { font-size: 13.5px; color: var(--c-fg-mute); margin-right: 4px; }
.kc-btn {
  padding: 6px 16px; border-radius: 999px; font-size: 13.5px; cursor: pointer;
  border: 1.5px solid var(--c-border-strong); background: var(--c-bg-soft); color: var(--c-fg-soft);
  transition: all var(--t-fast) var(--ease);
}
.kc-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.kc-btn.on-learning { background: var(--c-accent-soft); border-color: var(--c-accent); color: var(--c-accent); font-weight: 700; }
.kc-btn.on-mastered { background: var(--c-primary-soft); border-color: var(--c-primary); color: var(--c-primary); font-weight: 700; }

.rel-block { margin: 14px 0; }
.rel-block .rb-title { font-size: 13px; font-weight: 700; color: var(--c-fg-mute); letter-spacing: 1px; margin-bottom: 8px; }
.rel-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.rel-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 5px 13px; border-radius: 999px; font-size: 13.5px;
  background: var(--c-bg-soft); border: 1px solid var(--c-border); color: var(--c-fg-soft);
}
.rel-chip:hover { border-color: var(--c-primary); color: var(--c-primary); text-decoration: none; }
.rel-chip .rc-id { font-family: var(--font-mono); font-size: 11.5px; color: var(--c-fg-mute); }
.rel-chip.warn { border-color: color-mix(in srgb, var(--c-warm) 55%, var(--c-border)); }

.kp-body {
  background: var(--c-bg-soft); border: 1px solid var(--c-border);
  border-radius: var(--radius-m); padding: 30px 34px;
  box-shadow: var(--shadow-s);
}
@media (max-width: 640px) { .kp-body { padding: 22px 18px; } }

/* ---------- 正文排版 ---------- */
.kp-body h2 {
  font-size: 19px; margin: 30px 0 12px; padding-left: 12px;
  border-left: 4px solid var(--c-primary); line-height: 1.4;
}
.kp-body h2:first-child { margin-top: 0; }
.kp-body h3 { font-size: 16.5px; margin: 20px 0 8px; color: var(--c-fg); }
.kp-body p { margin: 10px 0; color: var(--c-fg-soft); }
.kp-body ul, .kp-body ol { margin: 10px 0 10px 22px; color: var(--c-fg-soft); }
.kp-body li { margin: 5px 0; }
.kp-body strong { color: var(--c-fg); }
.kp-body code {
  font-family: var(--font-mono); font-size: 0.86em;
  background: var(--c-bg-code); border: 1px solid var(--c-border);
  border-radius: 5px; padding: 1px 6px; color: var(--c-fg);
}
.kp-body pre {
  background: var(--c-bg-code); border: 1px solid var(--c-border);
  border-radius: var(--radius-s); padding: 14px 16px;
  overflow-x: auto; margin: 14px 0; line-height: 1.6;
}
.kp-body pre code { background: none; border: none; padding: 0; font-size: 13px; }
.tok-k { color: #9a5cc8; font-weight: 600; }
.tok-s { color: #2e8b57; }
.tok-c { color: var(--c-fg-mute); font-style: italic; }
.tok-n { color: #b3591f; }
[data-theme="dark"] .tok-k { color: #c39bff; }
[data-theme="dark"] .tok-s { color: #7fd6a0; }
[data-theme="dark"] .tok-n { color: #ffb066; }

blockquote {
  border-left: 4px solid var(--c-accent);
  background: var(--c-accent-soft);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  padding: 10px 16px; margin: 14px 0; color: var(--c-fg-soft); font-size: 15px;
}

.kp-body table {
  width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px;
  background: var(--c-bg-soft);
}
.kp-body th, .kp-body td {
  border: 1px solid var(--c-border); padding: 8px 12px; text-align: left;
  color: var(--c-fg-soft); vertical-align: top;
}
.kp-body th { background: var(--c-bg-sunken); color: var(--c-fg); font-weight: 700; }
.kp-body tr:nth-child(even) td { background: color-mix(in srgb, var(--c-bg-sunken) 45%, transparent); }
.table-wrap { overflow-x: auto; }

/* 公式 */
.formula {
  background: var(--c-bg-sunken); border: 1px solid var(--c-border);
  border-radius: var(--radius-m);
  padding: 16px 20px; margin: 16px 0;
  font-family: var(--font-mono); font-size: 15.5px; line-height: 2.1;
  overflow-x: auto;
}
.formula .fline { margin: 4px 0; color: var(--c-fg); }
.formula .fnote {
  font-family: var(--font-sans); font-size: 13px; color: var(--c-fg-mute); margin-top: 6px; line-height: 1.6;
}
.frac { display: inline-flex; flex-direction: column; vertical-align: middle; text-align: center; margin: 0 3px; font-size: 0.88em; }
.frac .num { padding: 0 6px 2px; border-bottom: 1.5px solid currentColor; line-height: 1.35; }
.frac .den { padding: 2px 6px 0; line-height: 1.35; }

/* 流程图（HTML 盒） */
.diagram-flow {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  background: var(--c-bg-sunken); border: 1px dashed var(--c-border-strong);
  border-radius: var(--radius-m); padding: 14px 16px; margin: 16px 0;
  font-size: 13.5px;
}
.dnode {
  border: 1.5px solid var(--c-border-strong); border-radius: var(--radius-s);
  background: var(--c-bg-soft); color: var(--c-fg-soft);
  padding: 6px 12px; line-height: 1.5;
}
.dnode.hl-a { border-color: var(--c-primary); color: var(--c-primary); font-weight: 600; }
.dnode.hl-b { border-color: var(--c-accent); color: var(--c-accent); font-weight: 600; }
.dnode.hl-c { border-color: var(--c-warm); color: var(--c-warm); font-weight: 600; }
.darrow { color: var(--c-fg-mute); font-weight: 600; padding: 0 2px; }
.cfg-svg { width: 100%; max-width: 520px; height: auto; display: block; margin: 10px 0; background: var(--c-bg-sunken); border: 1px dashed var(--c-border-strong); border-radius: var(--radius-m); }
.fig-cap { font-size: 13px; color: var(--c-fg-mute); margin: -6px 0 14px; }

/* ---------- 学习路径页 ---------- */
.path-banner {
  background: var(--c-bg-soft); border: 1px solid var(--c-border);
  border-radius: var(--radius-m); padding: 20px 22px; margin-bottom: 26px;
  box-shadow: var(--shadow-s);
}
.path-banner h2 { font-size: 19px; margin-bottom: 6px; }
.path-banner p { font-size: 14px; color: var(--c-fg-mute); }
.path-seq { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 14px; }
.path-step {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--c-primary-soft); color: var(--c-primary);
  border-radius: 999px; padding: 5px 13px; font-size: 13.5px; font-weight: 600;
}
.path-step .ps-id { font-family: var(--font-mono); font-size: 11px; opacity: .8; }
.path-step:hover { background: var(--c-primary); color: #fff; text-decoration: none; }
[data-theme="dark"] .path-step:hover { color: #16121f; }
.path-arrow { color: var(--c-fg-mute); }

.phase-block { margin-top: 30px; }
.phase-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.phase-head h2 { font-size: 20px; }
.phase-head .ph-note { font-size: 13px; color: var(--c-fg-mute); }
.phase-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.path-kp {
  display: flex; gap: 10px; align-items: flex-start;
  background: var(--c-bg-soft); border: 1px solid var(--c-border);
  border-radius: var(--radius-m); padding: 12px 14px;
  transition: border-color var(--t-fast), transform var(--t-fast);
}
.path-kp:hover { border-color: var(--c-primary); transform: translateY(-2px); text-decoration: none; }
.path-kp .pk-body { flex: 1; }
.path-kp .pk-title { font-size: 14.5px; font-weight: 600; color: var(--c-fg); }
.path-kp .pk-meta { font-size: 12px; color: var(--c-fg-mute); margin-top: 3px; display: flex; gap: 8px; align-items: center; }
.path-kp .pk-state { font-size: 11.5px; color: var(--c-fg-mute); margin-top: 4px; }
.path-kp .pk-state.s-learning { color: var(--c-accent); }
.path-kp .pk-state.s-mastered { color: var(--c-primary); }

/* ---------- 知识地图 ---------- */
.map-wrap { overflow-x: auto; background: var(--c-bg-soft); border: 1px solid var(--c-border); border-radius: var(--radius-m); padding: 12px; }
.map-wrap svg { min-width: 1180px; width: 100%; height: auto; display: block; }
.map-legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--c-fg-mute); margin: 12px 2px 0; }
.map-legend .li { display: inline-flex; align-items: center; gap: 6px; }
.map-node rect { transition: stroke-width var(--t-fast); }
.map-node:hover rect { stroke-width: 2.5; }

/* ---------- 术语表 ---------- */
.glossary-toolbar { display: flex; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.glossary-filter {
  flex: 1; min-width: 220px; padding: 9px 14px;
  border: 1px solid var(--c-border-strong); border-radius: 999px;
  background: var(--c-bg-soft); color: var(--c-fg); font-size: 14px; font-family: var(--font-sans);
}
.glossary-filter:focus { border-color: var(--c-primary); outline: none; }
.glossary-table { width: 100%; border-collapse: collapse; background: var(--c-bg-soft); }
.glossary-table th, .glossary-table td { border: 1px solid var(--c-border); padding: 9px 14px; text-align: left; vertical-align: top; }
.glossary-table th { background: var(--c-bg-sunken); font-size: 14px; }
.glossary-table td:first-child { font-weight: 700; white-space: nowrap; }
.glossary-table td:nth-child(2) { font-family: var(--font-mono); font-size: 13px; color: var(--c-fg-mute); white-space: nowrap; }
.glossary-table td:last-child { font-size: 14px; color: var(--c-fg-soft); }
.glossary-table tbody tr.hidden { display: none; }

/* ---------- 数据管理 ---------- */
.data-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 26px; }
.mini-btn {
  padding: 7px 16px; border-radius: var(--radius-s); font-size: 13px; cursor: pointer;
  border: 1px solid var(--c-border-strong); background: var(--c-bg-soft); color: var(--c-fg-soft);
  transition: border-color var(--t-fast);
}
.mini-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* ---------- 上一节/下一节 ---------- */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 26px; }
.pager a {
  display: block; background: var(--c-bg-soft); border: 1px solid var(--c-border);
  border-radius: var(--radius-m); padding: 13px 16px;
  transition: border-color var(--t-fast), transform var(--t-fast);
}
.pager a:hover { border-color: var(--c-primary); transform: translateY(-2px); text-decoration: none; }
.pager a.pg-next { text-align: right; }
.pager .pg-label { font-size: 12px; color: var(--c-fg-mute); }
.pager .pg-title { font-size: 14.5px; font-weight: 600; color: var(--c-fg); margin-top: 3px; }
@media (max-width: 560px) { .pager { grid-template-columns: 1fr; } .pager a.pg-next { text-align: left; } }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--c-border); margin-top: 40px;
  padding: 22px 16px 30px; text-align: center;
  font-size: 13px; color: var(--c-fg-mute);
}
.site-footer a { color: var(--c-fg-mute); text-decoration: underline; }

/* ---------- 响应式 ---------- */
@media (max-width: 760px) {
  .header-inner { flex-wrap: wrap; height: auto; padding: 8px 12px; row-gap: 8px; }
  .main-nav { order: 3; width: 100%; overflow-x: auto; }
  .search-wrap { margin-left: auto; }
  .search-input { width: 150px; }
  .search-input:focus { width: 180px; }
  .search-panel { width: min(92vw, 340px); }
  .hero { padding: 30px 22px; }
  .hero h1 { font-size: 29px; }
  main { padding: 20px 14px 48px; }
  .formula { font-size: 13.5px; padding: 12px 12px; }
}