/* ============================================
   星数打假实验室 · 全局样式
   ============================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #070b14;
  --bg-2: #0b1120;
  --card: rgba(148, 163, 184, .06);
  --card-hover: rgba(148, 163, 184, .1);
  --card-border: rgba(148, 163, 184, .14);
  --text: #e6edf7;
  --text-2: #9aa7bd;
  --text-3: #64748b;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --accent-3: #c084fc;
  --good: #34d399;
  --warn: #fbbf24;
  --bad: #fb7185;
  --radius: 18px;
  --shadow: 0 20px 50px -24px rgba(0, 0, 0, .7);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;
}

@property --gauge-val {
  syntax: '<number>';
  inherits: false;
  initial-value: 0;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60rem 60rem at 85% -10%, rgba(56, 189, 248, .13), transparent 60%),
    radial-gradient(50rem 50rem at -10% 30%, rgba(129, 140, 248, .13), transparent 60%),
    radial-gradient(45rem 45rem at 55% 115%, rgba(192, 132, 252, .1), transparent 60%);
  pointer-events: none;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(148, 163, 184, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, .045) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(70rem 46rem at 50% 0%, #000 25%, transparent 72%);
  mask-image: radial-gradient(70rem 46rem at 50% 0%, #000 25%, transparent 72%);
}

::selection { background: rgba(56, 189, 248, .3); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(148, 163, 184, .25); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: rgba(148, 163, 184, .4); }

img, svg, canvas { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

.container { width: min(1120px, 100% - 2.5rem); margin-inline: auto; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  background: rgba(7, 11, 20, .72);
  border-bottom: 1px solid rgba(148, 163, 184, .1);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }

.brand { display: flex; align-items: center; gap: .6rem; }
.brand-mark {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06121f;
  font-weight: 800;
  font-size: 1.05rem;
  box-shadow: 0 6px 18px -6px rgba(56, 189, 248, .6);
}
.brand-text { font-weight: 700; font-size: 1.06rem; letter-spacing: .02em; }
.brand-text span { background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }

.site-nav { display: flex; gap: .35rem; }
.nav-link {
  padding: .5rem .95rem;
  border-radius: 999px;
  color: var(--text-2);
  font-size: .92rem;
  transition: color .25s, background .25s;
}
.nav-link:hover { color: var(--text); background: rgba(148, 163, 184, .08); }
.nav-link.active { color: #06121f; background: linear-gradient(135deg, var(--accent), var(--accent-2)); font-weight: 600; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: var(--card);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--text-2); border-radius: 2px; transition: transform .3s, opacity .3s; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 首页 Hero ===== */
.hero { padding: 6rem 0 3.5rem; text-align: center; position: relative; }
.hero-badge {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .4rem 1rem;
  border: 1px solid rgba(56, 189, 248, .35);
  border-radius: 999px;
  background: rgba(56, 189, 248, .08);
  color: var(--accent);
  font-size: .85rem;
  margin-bottom: 1.4rem;
}
.hero-title { font-size: clamp(2.1rem, 6vw, 3.6rem); font-weight: 800; line-height: 1.18; letter-spacing: .01em; }
.grad-text { background: linear-gradient(92deg, var(--accent), var(--accent-2), var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { margin: 1.3rem auto 0; max-width: 42rem; color: var(--text-2); font-size: 1.06rem; }
.hero-actions { margin-top: 2rem; display: flex; gap: .9rem; justify-content: center; flex-wrap: wrap; }

.hero-stats { margin-top: 4rem; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.stat-tile {
  padding: 1.4rem 1rem;
  text-align: center;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform .3s ease, border-color .3s ease;
}
.stat-tile:hover { transform: translateY(-4px); border-color: rgba(56, 189, 248, .4); }
.stat-num {
  font-size: 2.2rem; font-weight: 800; font-family: var(--mono);
  background: linear-gradient(90deg, var(--text), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-num.warn { background: linear-gradient(90deg, var(--warn), var(--bad)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { margin-top: .35rem; color: var(--text-2); font-size: .88rem; }

/* ===== 通用区块 ===== */
.section { margin-top: 3.5rem; }
.section-head { margin-bottom: 1.4rem; }
.section-title { font-size: 1.5rem; font-weight: 700; letter-spacing: .01em; }
.section-desc { color: var(--text-2); font-size: .95rem; margin-top: .35rem; }
.section-head.center { text-align: center; }

/* ===== 卡片 ===== */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  padding: 1.6rem;
  transition: transform .3s ease, border-color .3s ease, background .3s ease;
}
.card.hoverable:hover { transform: translateY(-4px); border-color: rgba(56, 189, 248, .35); background: var(--card-hover); }
.card h3 { font-size: 1.1rem; margin-bottom: 1rem; }
.table-card { padding: .9rem 1.2rem; }

/* 图表容器 */
.chart-wrap { position: relative; height: 380px; }
.chart-radar { height: 400px; }
.chart-bars { height: 400px; }
.chart-loading { position: absolute; inset: 0; display: grid; place-items: center; color: var(--text-3); font-size: .92rem; }

/* ===== 表格 ===== */
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.data-table th {
  text-align: left; padding: .8rem .9rem;
  color: var(--text-2); font-weight: 600; font-size: .82rem;
  border-bottom: 1px solid var(--card-border);
  white-space: nowrap;
}
.data-table td { padding: .85rem .9rem; border-bottom: 1px solid rgba(148, 163, 184, .07); white-space: nowrap; }
.data-table tbody tr { transition: background .2s; }
.data-table tbody tr:hover { background: rgba(148, 163, 184, .05); }
.data-table tbody tr:last-child td { border-bottom: none; }
.rank-cell { font-family: var(--mono); color: var(--text-3); }
.cell-name { font-weight: 600; }
.cell-sub { font-size: .78rem; color: var(--text-3); margin-top: .1rem; }
.danger-text { color: var(--bad); font-weight: 600; }
.metric-name { color: var(--text-2); font-weight: 600; }

/* 徽章 */
.water-badge {
  display: inline-block; min-width: 40px; text-align: center;
  padding: .18rem .55rem; border-radius: 999px;
  font-weight: 700; font-family: var(--mono); font-size: .9rem;
}
.water-badge.good { background: rgba(52, 211, 153, .14); color: var(--good); }
.water-badge.mid { background: rgba(251, 191, 36, .12); color: var(--warn); }
.water-badge.warn { background: rgba(251, 146, 60, .14); color: #fb923c; }
.water-badge.bad { background: rgba(251, 113, 133, .14); color: var(--bad); }

.mini-chip {
  display: inline-block;
  margin: .1rem .15rem;
  padding: .1rem .5rem;
  border-radius: 999px;
  font-size: .76rem;
  background: rgba(148, 163, 184, .1);
  color: var(--text-2);
}

.inline-link { color: var(--accent); border-bottom: 1px dashed rgba(56, 189, 248, .4); transition: border-color .2s; }
.inline-link:hover { border-color: var(--accent); }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
  padding: .78rem 1.7rem;
  border-radius: 999px;
  font-size: .96rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
}
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #06121f; box-shadow: 0 10px 26px -10px rgba(56, 189, 248, .55); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -10px rgba(56, 189, 248, .65); }
.btn-ghost { background: var(--card); border-color: var(--card-border); color: var(--text); }
.btn-ghost:hover { transform: translateY(-2px); border-color: rgba(56, 189, 248, .4); background: var(--card-hover); }

/* ===== 栅格 ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.grid-form { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; align-items: start; }

/* ===== 方法卡片 ===== */
.method-card .step-num {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  font-family: var(--mono); font-weight: 700;
  background: linear-gradient(135deg, rgba(56, 189, 248, .18), rgba(129, 140, 248, .18));
  color: var(--accent);
  margin-bottom: .9rem;
}
.method-card h4 { margin-bottom: .5rem; }
.method-card p { color: var(--text-2); font-size: .92rem; }

/* ===== CTA 横幅 ===== */
.cta-band {
  text-align: center;
  padding: 3.2rem 2rem;
  background:
    radial-gradient(30rem 14rem at 50% 0%, rgba(56, 189, 248, .14), transparent 70%),
    var(--card);
  border: 1px solid rgba(56, 189, 248, .25);
}
.cta-band h3 { font-size: 1.7rem; margin-bottom: .6rem; }
.cta-band p { color: var(--text-2); margin-bottom: 1.6rem; }

/* ===== 内页 Hero ===== */
.page-hero { padding: 4.5rem 0 1rem; text-align: center; }
.page-hero h1 { font-size: clamp(1.8rem, 4.5vw, 2.7rem); font-weight: 800; }
.page-hero p { color: var(--text-2); margin-top: .8rem; font-size: 1.02rem; }

/* ===== Chips ===== */
.chips { display: flex; flex-wrap: wrap; gap: .7rem; }
.chip {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .6rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text-2);
  font-size: .9rem;
  cursor: pointer;
  transition: border-color .25s, background .25s, color .25s, transform .2s;
}
.chip:hover { transform: translateY(-2px); border-color: rgba(56, 189, 248, .45); color: var(--text); }
.chip.on {
  border-color: transparent;
  background: linear-gradient(135deg, rgba(56, 189, 248, .18), rgba(129, 140, 248, .18));
  color: var(--text);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, .4), 0 8px 20px -10px rgba(56, 189, 248, .5);
}
.chip.on .chip-sub { color: var(--accent); }
.chip-name { font-weight: 600; }
.chip-sub { font-size: .76rem; color: var(--text-3); }
.hint { margin-top: .8rem; color: var(--text-3); font-size: .88rem; }

.filter-chips { display: flex; flex-wrap: wrap; gap: .7rem; justify-content: center; margin-bottom: 2rem; }

/* ===== 对比结论 ===== */
.verdict-card { border-color: rgba(251, 191, 36, .3); }
.verdict-card strong { color: var(--warn); }
.verdict-text { color: var(--text-2); }

/* ===== 表单 ===== */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.form-field { display: flex; flex-direction: column; gap: .4rem; }
.form-field label { font-size: .88rem; color: var(--text-2); font-weight: 600; }
.form-field input, .form-field select {
  width: 100%;
  padding: .72rem .95rem;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: rgba(7, 11, 20, .55);
  color: var(--text);
  font-size: .95rem;
  font-family: var(--mono);
  outline: none;
  transition: border-color .25s, box-shadow .25s;
}
.form-field input:focus, .form-field select:focus {
  border-color: rgba(56, 189, 248, .6);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, .15);
}
.form-field input::placeholder { color: var(--text-3); }
.form-actions { margin-top: 1.4rem; display: flex; gap: .8rem; flex-wrap: wrap; }

/* ===== 计算结果 ===== */
.result-top { display: grid; grid-template-columns: auto 1fr; gap: 2rem; align-items: center; margin-bottom: 1.6rem; }
.gauge-wrap { display: grid; place-items: center; }
.gauge {
  position: relative;
  width: 190px; height: 190px;
  border-radius: 50%;
  background: conic-gradient(var(--gauge-color, var(--warn)) calc(var(--gauge-val, 0) * 1%), rgba(148, 163, 184, .12) 0);
  transition: --gauge-val 1s cubic-bezier(.2, .7, .3, 1);
  display: grid;
  place-items: center;
}
.gauge::before {
  content: "";
  position: absolute; inset: 16px;
  background: radial-gradient(circle at 30% 30%, #131c30, var(--bg-2));
  border-radius: 50%;
  border: 1px solid var(--card-border);
}
.gauge-val { position: relative; text-align: center; }
.gauge-val b { display: block; font-size: 2.6rem; font-family: var(--mono); font-weight: 800; }
.gauge-val small { color: var(--text-3); font-size: .8rem; }

.verdict-badge { display: inline-block; padding: .35rem 1.1rem; border-radius: 999px; font-weight: 700; font-size: 1rem; }
.verdict-badge.good, .verdict-badge.ok { background: rgba(52, 211, 153, .15); color: var(--good); }
.verdict-badge.mid { background: rgba(251, 191, 36, .14); color: var(--warn); }
.verdict-badge.warn { background: rgba(251, 146, 60, .15); color: #fb923c; }
.verdict-badge.bad { background: rgba(251, 113, 133, .15); color: var(--bad); }
.verdict-desc { margin-top: .7rem; color: var(--text-2); max-width: 40rem; }

/* 分项诊断条 */
.factor { margin-bottom: 1.1rem; }
.factor-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: .4rem; }
.factor-name { font-size: .93rem; font-weight: 600; }
.factor-name small { color: var(--text-3); font-weight: 400; margin-left: .35rem; }
.factor-score { font-family: var(--mono); font-weight: 700; font-size: 1.05rem; }
.factor-track { height: 9px; border-radius: 999px; background: rgba(148, 163, 184, .12); overflow: hidden; }
.factor-bar { display: block; height: 100%; border-radius: 999px; transition: width 1s cubic-bezier(.2, .7, .3, 1); }
.factor-bar.good { background: linear-gradient(90deg, #34d399, #2dd4bf); }
.factor-bar.warn { background: linear-gradient(90deg, #fbbf24, #fb923c); }
.factor-bar.bad { background: linear-gradient(90deg, #fb7185, #f43f5e); }
.factor-desc { margin-top: .35rem; font-size: .84rem; color: var(--text-3); }

/* 建议列表 */
.suggestion-list { list-style: none; }
.suggestion-list li {
  position: relative;
  padding: .55rem 0 .55rem 1.5rem;
  color: var(--text-2);
  font-size: .93rem;
  border-bottom: 1px dashed rgba(148, 163, 184, .1);
}
.suggestion-list li:last-child { border-bottom: none; }
.suggestion-list li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ===== 案例 ===== */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
.case-card { display: flex; flex-direction: column; }
.case-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: .8rem; }
.case-date { color: var(--text-3); font-size: .82rem; font-family: var(--mono); }
.case-card h3 { font-size: 1.08rem; line-height: 1.45; margin-bottom: .6rem; }
.case-summary { color: var(--text-2); font-size: .93rem; }
.case-details { margin-top: 1rem; }
.case-details summary {
  cursor: pointer;
  display: inline-flex; align-items: center; gap: .4rem;
  color: var(--accent); font-size: .9rem; font-weight: 600;
  list-style: none;
}
.case-details summary::-webkit-details-marker { display: none; }
.case-details summary::after { content: "+"; font-family: var(--mono); transition: transform .3s; }
.case-details[open] summary::after { content: "−"; }
.case-body { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed rgba(148, 163, 184, .15); }
.case-body h4 { font-size: .88rem; color: var(--text-2); margin: .9rem 0 .45rem; }
.case-body ul, .case-body ol { padding-left: 1.2rem; }
.case-body li { font-size: .9rem; color: var(--text-2); margin-bottom: .4rem; }
.case-body p { font-size: .9rem; color: var(--text-2); }

.badge { display: inline-block; padding: .22rem .75rem; border-radius: 999px; font-size: .8rem; font-weight: 600; }
.badge-zombie { background: rgba(251, 113, 133, .15); color: var(--bad); }
.badge-ranking { background: rgba(251, 146, 60, .15); color: #fb923c; }
.badge-interaction { background: rgba(251, 191, 36, .14); color: var(--warn); }
.badge-clean { background: rgba(52, 211, 153, .15); color: var(--good); }

/* ===== 页脚 ===== */
.site-footer { margin-top: 5rem; border-top: 1px solid rgba(148, 163, 184, .1); background: rgba(7, 11, 20, .6); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; padding: 3rem 0 2rem; }
.footer-about p { color: var(--text-2); font-size: .9rem; margin-top: .9rem; max-width: 24rem; }
.footer-links h4 { font-size: .9rem; color: var(--text); margin-bottom: .8rem; }
.footer-links a { display: block; color: var(--text-2); font-size: .88rem; padding: .28rem 0; transition: color .2s, transform .2s; }
.footer-links a:hover { color: var(--accent); transform: translateX(3px); }
.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, .08);
  padding: 1.3rem 0;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: .6rem;
  color: var(--text-3); font-size: .82rem;
}

/* ===== 入场动画 ===== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s cubic-bezier(.2, .7, .3, 1); }
.reveal.revealed { opacity: 1; transform: none; }

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 1.5rem; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(14, 21, 38, .95);
  border: 1px solid rgba(56, 189, 248, .4);
  color: var(--text);
  padding: .7rem 1.4rem;
  border-radius: 999px;
  font-size: .9rem;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s, transform .3s;
  box-shadow: 0 14px 40px -12px rgba(0, 0, 0, .8);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== 无 Chart.js 时的降级图表 ===== */
.fb-chart { display: flex; flex-direction: column; gap: .55rem; }
.fb-row { display: grid; grid-template-columns: 72px 1fr 64px 1fr 64px; gap: .6rem; align-items: center; font-size: .84rem; }
.fb-label { color: var(--text-2); font-weight: 600; text-align: right; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fb-val { font-family: var(--mono); color: var(--text-2); }
.fb-track { height: 10px; border-radius: 999px; background: rgba(148, 163, 184, .12); overflow: hidden; }
.fb-bar { display: block; height: 100%; border-radius: 999px; }
.fb-fans { background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.fb-rate { background: linear-gradient(90deg, var(--warn), #fb923c); }

.empty { color: var(--text-3); text-align: center; padding: 1.5rem 0; }
.text-2 { color: var(--text-2); }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .grid-3, .grid-4, .case-grid { grid-template-columns: 1fr 1fr; }
  .grid-form { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .fb-row { grid-template-columns: 64px 1fr 56px 1fr 56px; }
}

@media (max-width: 720px) {
  .desktop-only { display: none; }
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: 66px; left: 1.25rem; right: 1.25rem;
    flex-direction: column;
    background: rgba(10, 15, 26, .96);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: .7rem;
    gap: .2rem;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity .25s, transform .25s;
    box-shadow: var(--shadow);
  }
  .site-nav.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-link { padding: .75rem 1rem; border-radius: 10px; }
  .hero { padding-top: 4rem; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .grid-3, .grid-4, .grid-2, .case-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .result-top { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.6rem; }
  .chart-wrap { height: 320px; }
  .fb-row { grid-template-columns: 1fr; gap: .2rem; text-align: center; }
  .fb-label { text-align: center; }
  .footer-bottom { justify-content: center; text-align: center; }
}

@media (max-width: 420px) {
  .hero-stats { grid-template-columns: 1fr; }
  .stat-tile { padding: 1.1rem; }
}