/* ============================================================
   DP 道阶表 · 静态站点样式
   墨色底 / 青玉 EASY / 朱红 HARD / 金线
   ============================================================ */

:root {
  --bg: #100e0c;
  --bg-deep: #0b0908;
  --panel: #1a1612;
  --panel-2: #211b16;
  --line: #3a3128;
  --line-soft: #2a231d;
  --ink: #ece4d3;
  --ink-soft: #c8beac;
  --muted: #8e8272;
  --faint: #6f6558;
  --gold: #c9a35c;
  --gold-soft: #8f7440;
  --jade: #74c3ab;
  --jade-deep: #2e6b5a;
  --crimson: #d97b6c;
  --crimson-deep: #7d3430;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", "Cascadia Mono", Consolas, "Courier New", monospace;

  --accent: var(--gold);
  --accent-rgb: 201, 163, 92;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background:
    radial-gradient(1100px 620px at 12% -8%, rgba(116, 195, 171, 0.085), transparent 62%),
    radial-gradient(900px 520px at 88% -4%, rgba(217, 123, 108, 0.075), transparent 60%),
    linear-gradient(180deg, #14100d 0%, #0e0c0a 52%, #110e0b 100%);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.32;
  background-image: radial-gradient(rgba(255, 255, 255, 0.045) 0.7px, transparent 0.7px);
  background-size: 4px 4px;
}

body.theme-easy { --accent: var(--jade); --accent-rgb: 116, 195, 171; }
body.theme-hard { --accent: var(--crimson); --accent-rgb: 217, 123, 108; }

[hidden] { display: none !important; }

a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
code { font-family: var(--mono); }

::selection { background: rgba(var(--accent-rgb), 0.26); color: #fff; }

:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- 顶栏 ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(58, 49, 40, 0.75);
  background: rgba(16, 14, 12, 0.84);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.topbar-inner {
  max-width: 1180px;
  height: 64px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--serif);
  letter-spacing: 0.16em;
  white-space: nowrap;
}

.brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold-soft);
  color: var(--gold);
  font-size: 17px;
  line-height: 1;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(201, 163, 92, 0.28);
}

.brand-text { font-size: 15px; color: var(--ink); }

.nav { display: flex; align-items: center; gap: 4px; }

.nav a {
  padding: 8px 13px;
  font-size: 13px;
  letter-spacing: 0.09em;
  color: var(--muted);
  border: 1px solid transparent;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.nav a:hover { color: var(--ink); }

.nav a.active {
  color: var(--gold);
  background: rgba(201, 163, 92, 0.07);
  border-color: rgba(201, 163, 92, 0.22);
}

.nav .sep {
  color: var(--faint);
  opacity: 0.6;
  font-size: 11px;
  padding: 0 1px;
}

.nav .lang {
  padding: 5px 14px;
  border: 1px solid rgba(201, 163, 92, 0.45);
  border-radius: 999px;
  font-size: 12px;
  color: var(--ink-soft);
}

.nav .lang:hover {
  color: var(--gold);
  border-color: rgba(201, 163, 92, 0.6);
}

/* ---------- 主页 · 卷首 ---------- */

.hero {
  position: relative;
  max-width: 1180px;
  margin: 0 auto;
  padding: 76px 28px 42px;
  text-align: center;
  overflow: hidden;
}

.hero-mountains {
  position: absolute;
  left: 50%;
  bottom: -18px;
  width: min(1240px, 118%);
  transform: translateX(-50%);
  pointer-events: none;
  opacity: 0.55;
}

.hero > *:not(.hero-mountains) { position: relative; z-index: 1; }

.seal {
  position: relative;
  width: 72px;
  height: 72px;
  margin: 0 auto 22px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(201, 163, 92, 0.55);
  color: var(--gold);
  font-family: var(--serif);
  font-size: 30px;
  line-height: 1;
  transform: rotate(-2deg);
}

.seal::before {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid rgba(201, 163, 92, 0.25);
}

.seal i {
  position: absolute;
  right: 7px;
  bottom: 5px;
  font-style: normal;
  font-size: 9px;
  letter-spacing: 0.08em;
  color: rgba(201, 163, 92, 0.65);
}

.eyebrow {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold-soft);
}

.hero h1 {
  margin: 14px 0 10px;
  font-family: var(--serif);
  font-size: clamp(46px, 7.4vw, 78px);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-indent: 0.18em;
  line-height: 1.15;
  color: #f3ecdc;
  text-shadow: 0 0 40px rgba(201, 163, 92, 0.12);
}

.hero-sub {
  max-width: 620px;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 14px;
  letter-spacing: 0.06em;
}

.hero-meta {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 26px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.hero-meta b {
  margin-right: 5px;
  color: var(--gold);
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
}

/* ---------- 语言切换 ---------- */

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 15px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  line-height: 1;
}

.lang-switch .lang-active {
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(var(--accent-rgb), 0.55);
  color: var(--accent);
}

.lang-switch a {
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  color: var(--muted);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.lang-switch a:hover {
  border-bottom-color: var(--line);
  color: var(--ink);
}

.lang-switch .sep {
  color: var(--faint);
  opacity: 0.45;
}

.lang-switch .version {
  color: var(--faint);
  letter-spacing: 0.08em;
}

.table-id .lang-switch { margin-top: 10px; margin-bottom: 0; }

.hero .lang-switch { margin-bottom: 12px; }

body[data-lang="en"] .hero h1 {
  letter-spacing: 0.06em;
  text-indent: 0;
}

body[data-lang="en"] .eyebrow { letter-spacing: 0.2em; }

body[data-lang="en"] .table-id h1 { letter-spacing: 0.06em; }

body[data-lang="en"] .section-head h2 { letter-spacing: 0.1em; }

body[data-lang="en"] .band .name { letter-spacing: 0.05em; }

body[data-lang="en"] .band-cell .name {
  white-space: nowrap;
  letter-spacing: 0.04em;
}

/* ---------- 主页 · 两张表 ---------- */

.cards {
  max-width: 1180px;
  margin: 0 auto;
  padding: 6px 28px 58px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 288px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background:
    linear-gradient(158deg, rgba(33, 27, 22, 0.96), rgba(24, 20, 16, 0.96));
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.card::before {
  content: attr(data-symbol);
  position: absolute;
  right: -6px;
  bottom: -54px;
  z-index: -1;
  font-family: var(--serif);
  font-size: 190px;
  line-height: 1;
  letter-spacing: -0.06em;
  color: var(--accent);
  opacity: 0.055;
  transition: opacity 0.24s ease, transform 0.24s ease;
}

.card::after {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px solid rgba(var(--accent-rgb), 0.14);
  pointer-events: none;
}

.card.easy { --accent: var(--jade); --accent-rgb: 116, 195, 171; }
.card.hard { --accent: var(--crimson); --accent-rgb: 217, 123, 108; }

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--accent-rgb), 0.5);
  box-shadow: 0 24px 60px -28px rgba(var(--accent-rgb), 0.55);
}

.card:hover::before { opacity: 0.1; transform: translateY(-4px); }

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.card-symbol {
  font-family: var(--serif);
  font-size: 27px;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.card-mode {
  padding: 5px 9px;
  border: 1px solid rgba(var(--accent-rgb), 0.28);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
}

.card h2 {
  margin: 24px 0 6px;
  font-family: var(--serif);
  font-size: 33px;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.card p {
  max-width: 34em;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.03em;
}

.card-stats {
  display: flex;
  gap: 28px;
  margin-top: auto;
  padding-top: 26px;
}

.stat { display: flex; flex-direction: column; line-height: 1.2; }

.stat b {
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 600;
  color: var(--accent);
}

.stat span {
  margin-top: 3px;
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.16em;
}

.card-cta {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.card-cta i { font-style: normal; color: var(--accent); transition: transform 0.2s ease; }
.card:hover .card-cta i { transform: translateX(4px); }

/* ---------- 通用区块 ---------- */

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px 64px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.section-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.05em;
}

/* ---------- 主页 · 七境 ---------- */

.band-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
}

.band-cell {
  position: relative;
  padding: 16px 12px 14px;
  text-align: center;
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(33, 27, 22, 0.5), rgba(20, 17, 14, 0.4));
}

.band-cell::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 28px;
  height: 1px;
  transform: translateX(-50%);
  background: rgba(201, 163, 92, 0.35);
}

.band-cell .no {
  display: block;
  color: var(--gold-soft);
  font-family: var(--serif);
  font-size: 11px;
  letter-spacing: 0.2em;
}

.band-cell .name {
  display: block;
  margin: 7px 0 2px;
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.12em;
}

.band-cell .desc {
  display: block;
  min-height: 16px;
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.band-cell .counts {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
}

.count-easy { color: var(--jade); }
.count-hard { color: var(--crimson); }

/* ---------- 主页 · 导入 ---------- */

.import {
  padding: 26px 28px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(33, 27, 22, 0.72), rgba(19, 16, 13, 0.72));
}

.import > p {
  margin: 0 0 8px;
  color: var(--ink-soft);
  font-size: 13px;
}

.import > p:last-child { margin-bottom: 0; }

.url-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  background: rgba(11, 9, 8, 0.72);
}

.url-label {
  flex: 0 0 auto;
  padding: 2px 7px;
  border: 1px solid currentColor;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.url-label.easy { color: var(--jade); }
.url-label.hard { color: var(--crimson); }

.url-row code {
  flex: 1 1 auto;
  overflow-x: auto;
  padding-bottom: 2px;
  color: var(--ink-soft);
  font-size: 11.5px;
  white-space: nowrap;
  scrollbar-width: thin;
}

.copy-btn,
.reset-btn {
  flex: 0 0 auto;
  padding: 7px 12px;
  border: 1px solid rgba(var(--accent-rgb), 0.32);
  background: transparent;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.1em;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.copy-btn:hover,
.reset-btn:hover {
  background: rgba(var(--accent-rgb), 0.1);
  border-color: rgba(var(--accent-rgb), 0.6);
}

.hint {
  margin-top: 14px !important;
  color: var(--muted) !important;
  font-size: 11.5px !important;
}

.hint code { color: var(--gold-soft); }

.load-hint {
  margin: 14px 0 0;
  padding: 10px 12px;
  border-left: 2px solid var(--gold-soft);
  background: rgba(201, 163, 92, 0.05);
  color: var(--muted);
  font-size: 12px;
}

/* ---------- 主页 · 口径 ---------- */

.notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.notes article {
  padding: 20px;
  border: 1px solid var(--line-soft);
  background: rgba(26, 22, 18, 0.5);
}

.notes h3 {
  margin: 0 0 8px;
  color: var(--gold);
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.notes p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

/* ---------- FAQ ---------- */

.faq-hero {
  max-width: 960px;
  margin: 0 auto;
  padding: 64px 28px 30px;
  border-bottom: 1px solid var(--line-soft);
}

.faq-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 44px;
  align-items: start;
}

.faq-hero-main { min-width: 0; }

.faq-hero h1 {
  margin: 14px 0 10px;
  font-family: var(--serif);
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 600;
  letter-spacing: 0.16em;
  line-height: 1.2;
  color: #f3ecdc;
}

.faq-hero .hero-sub {
  margin: 0;
  max-width: 640px;
  text-align: left;
}

.faq-hero .lang-switch { margin-top: 18px; }

.faq-toc {
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  background: rgba(26, 22, 18, 0.5);
}

.faq-toc-title {
  margin: 0 0 8px;
  color: var(--gold);
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.faq-toc a {
  display: block;
  padding: 6px 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.5;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.faq-toc a:hover {
  color: var(--gold);
  border-bottom-color: rgba(201, 163, 92, 0.35);
}

.faq {
  max-width: 960px;
  padding-top: 34px;
}

.faq h2 {
  margin: 44px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--ink);
  scroll-margin-top: 84px;
}

.faq h2:first-child { margin-top: 0; }
.faq h2:target { color: var(--gold); }

.faq h3 {
  margin: 28px 0 8px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.faq p,
.faq li {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.85;
}

.faq p { margin: 10px 0; }
.faq ul { margin: 10px 0; padding-left: 1.35em; }
.faq li { margin: 5px 0; }
.faq li::marker { color: var(--gold-soft); }
.faq strong { color: var(--ink); }

.faq a {
  color: var(--gold);
  border-bottom: 1px solid rgba(201, 163, 92, 0.4);
  transition: border-color 0.18s ease;
}

.faq a:hover { border-bottom-color: var(--gold); }

.faq code {
  padding: 1px 5px;
  border: 1px solid var(--line-soft);
  background: rgba(11, 9, 8, 0.55);
  color: var(--gold);
  font-size: 0.92em;
}

.faq pre {
  margin: 14px 0;
  padding: 14px 16px;
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  background: rgba(11, 9, 8, 0.72);
}

.faq pre code {
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink-soft);
}

.faq blockquote {
  margin: 14px 0;
  padding: 10px 14px;
  border-left: 2px solid var(--gold-soft);
  background: rgba(201, 163, 92, 0.05);
  color: var(--muted);
  font-size: 13px;
}

.faq-table { overflow-x: auto; }

.faq table {
  width: 100%;
  margin: 14px 0;
  border-collapse: collapse;
  font-size: 13px;
}

.faq th,
.faq td {
  padding: 8px 10px;
  border: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}

.faq th {
  color: var(--gold);
  background: rgba(201, 163, 92, 0.06);
  font-weight: 600;
}

.faq td { color: var(--ink-soft); }
.faq hr { margin: 36px 0; border: 0; border-top: 1px solid var(--line-soft); }

/* ---------- 表页 ---------- */

.table-hero {
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px 28px 24px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 26px;
  border-bottom: 1px solid var(--line-soft);
}

.table-id { display: flex; align-items: flex-end; gap: 22px; }

.table-id .symbol {
  font-family: var(--serif);
  font-size: clamp(44px, 6vw, 62px);
  line-height: 0.9;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-shadow: 0 0 34px rgba(var(--accent-rgb), 0.22);
}

.table-id .eyebrow { color: rgba(var(--accent-rgb), 0.85); }

.table-id h1 {
  margin: 7px 0 3px;
  font-family: var(--serif);
  font-size: clamp(32px, 4.4vw, 48px);
  font-weight: 600;
  letter-spacing: 0.16em;
  line-height: 1.15;
}

.name-sub {
  margin: 0;
  color: var(--muted);
  font-size: 11.5px;
  letter-spacing: 0.04em;
}

.table-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 16px;
}

.table-stats { display: flex; gap: 26px; text-align: right; }

.table-stats .stat b { font-size: 20px; }

.switch {
  display: inline-flex;
  border: 1px solid var(--line);
}

.switch a {
  padding: 9px 18px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  transition: background 0.18s ease, color 0.18s ease;
}

.switch a + a { border-left: 1px solid var(--line); }

.switch a:hover { color: var(--ink); }

.switch a.active {
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.11);
}

/* ---------- 表页 · 控件 ---------- */

.controls {
  position: sticky;
  top: 64px;
  z-index: 30;
  max-width: 1180px;
  margin: 0 auto;
  padding: 13px 28px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  background: rgba(16, 14, 12, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}

.search {
  position: relative;
  flex: 1 1 300px;
  min-width: 220px;
}

.search svg {
  position: absolute;
  left: 13px;
  top: 50%;
  width: 15px;
  height: 15px;
  transform: translateY(-50%);
  color: var(--faint);
  pointer-events: none;
}

.search input {
  width: 100%;
  padding: 10px 13px 10px 37px;
  border: 1px solid var(--line);
  background: rgba(11, 9, 8, 0.8);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 0.02em;
  outline: none;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.search input::placeholder { color: var(--faint); }

.search input:focus {
  border-color: rgba(var(--accent-rgb), 0.5);
  background: rgba(11, 9, 8, 0.95);
}

.controls select {
  max-width: 240px;
  padding: 10px 34px 10px 12px;
  border: 1px solid var(--line);
  background-color: rgba(11, 9, 8, 0.8);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238e8272' stroke-width='1.2'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  color: var(--ink-soft);
  font-size: 12px;
  appearance: none;
  -webkit-appearance: none;
  outline: none;
  cursor: pointer;
}

.controls select:focus { border-color: rgba(var(--accent-rgb), 0.5); }

.controls option,
.controls optgroup {
  background: #15120f;
  color: var(--ink-soft);
}

.resultbar {
  max-width: 1180px;
  margin: 0 auto;
  padding: 13px 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 11.5px;
  letter-spacing: 0.04em;
}

.resultbar b {
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 500;
}

.legend {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--faint);
  font-size: 10.5px;
}

.dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--muted);
}

.dot.easy { background: var(--jade); }
.dot.hard { background: var(--crimson); }
.dot.bucket { background: transparent; border: 1px dashed var(--muted); }

/* ---------- 表页 · 大境 / 小阶 / 谱面 ---------- */

.bands {
  max-width: 1180px;
  margin: 0 auto;
  padding: 10px 28px 70px;
}

.band {
  margin-top: 13px;
  border: 1px solid var(--line-soft);
  background: rgba(26, 22, 18, 0.46);
}

.band[open] { border-color: rgba(var(--accent-rgb), 0.24); }

.band summary {
  display: grid;
  grid-template-columns: 48px auto 1fr auto 20px;
  align-items: baseline;
  gap: 14px;
  padding: 15px 18px;
  list-style: none;
  cursor: pointer;
  user-select: none;
}

.band summary::-webkit-details-marker { display: none; }

.band summary:hover { background: rgba(var(--accent-rgb), 0.035); }

.band .no {
  color: var(--gold-soft);
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.band .name {
  font-family: var(--serif);
  font-size: 21px;
  letter-spacing: 0.15em;
  color: var(--ink);
}

.band .desc {
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.band .count {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  white-space: nowrap;
}

.band .chev {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 13px;
  transition: transform 0.2s ease;
}

.band[open] .chev { transform: rotate(45deg); }

.band-body { padding: 0 18px 12px; }

.level-group { border-top: 1px solid var(--line-soft); }

.level-head {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 12px 0 7px;
}

.level-chip {
  padding: 3px 9px;
  border: 1px solid rgba(var(--accent-rgb), 0.35);
  background: rgba(var(--accent-rgb), 0.06);
  color: var(--accent);
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.level-chip.bucket {
  border-style: dashed;
  border-color: var(--line);
  background: transparent;
  color: var(--muted);
}

.level-head .code {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.level-head .lv-count {
  margin-left: auto;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  white-space: nowrap;
}

.chart-list {
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
}

.chart {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto 36px;
  align-items: center;
  gap: 12px;
  padding: 6px 8px;
  border-top: 1px solid rgba(58, 49, 40, 0.32);
  font-size: 13px;
  line-height: 1.5;
  transition: background 0.12s ease;
}

.chart:hover { background: rgba(var(--accent-rgb), 0.05); }

.chart .idx {
  color: #5c5449;
  font-family: var(--mono);
  font-size: 9.5px;
  text-align: right;
}

.chart .title {
  overflow: hidden;
  color: var(--ink-soft);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chart:hover .title { color: var(--ink); }

.chart .hash {
  padding: 0 0 1px;
  border: 0;
  border-bottom: 1px dotted #4a4238;
  background: none;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.chart .hash:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.chart .sha {
  padding: 2px 4px;
  border: 1px solid #3d352c;
  background: none;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.05em;
  text-align: center;
}

.chart button.sha:hover {
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), 0.5);
}

.chart .sha.none {
  border-style: dashed;
  color: var(--faint);
  opacity: 0.32;
  cursor: default;
}

/* ---------- 空 / 错误 / 载入 ---------- */

.loading,
.error,
.empty {
  max-width: 1180px;
  margin: 0 auto;
  padding: 70px 28px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.06em;
}

.error {
  border: 1px solid rgba(217, 123, 108, 0.28);
  background: rgba(217, 123, 108, 0.05);
  color: var(--ink-soft);
  text-align: left;
  line-height: 1.9;
}

.error code {
  padding: 1px 4px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--gold);
  font-size: 12px;
}

.empty p { margin: 0 0 16px; }

/* ---------- 页脚 / Toast ---------- */

.footer {
  border-top: 1px solid var(--line-soft);
  background: rgba(11, 9, 8, 0.6);
}

.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 26px 28px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.footer p { margin: 0; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 30px;
  z-index: 100;
  padding: 9px 18px;
  transform: translate(-50%, 14px);
  border: 1px solid rgba(var(--accent-rgb), 0.45);
  background: rgba(22, 18, 15, 0.96);
  color: var(--ink);
  font-size: 12px;
  letter-spacing: 0.08em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .band-grid { grid-template-columns: repeat(4, 1fr); }
  body[data-lang="en"] .band-cell .name { font-size: 16px; }
  .notes { grid-template-columns: 1fr; }
  .table-hero { flex-direction: column; align-items: flex-start; }
  .table-side { align-items: flex-start; }
  .table-stats { text-align: left; }
  .controls { position: static; }
}

@media (max-width: 640px) {
  .topbar-inner { height: 58px; padding: 0 16px; gap: 10px; }
  .brand { gap: 8px; }
  .brand-mark { width: 30px; height: 30px; font-size: 15px; }
  .brand-text { font-size: 13px; letter-spacing: 0.1em; }
  .nav a { padding: 7px 8px; font-size: 11.5px; letter-spacing: 0.04em; }

  .hero { padding: 52px 16px 30px; }
  .seal { width: 60px; height: 60px; font-size: 25px; }
  .hero-meta { gap: 10px 20px; flex-wrap: wrap; font-size: 11px; }

  .cards, .section { padding-left: 16px; padding-right: 16px; }
  .card { padding: 24px 20px; min-height: 260px; }
  .card h2 { font-size: 28px; }

  .band-grid { grid-template-columns: repeat(2, 1fr); }
  .section-head { flex-direction: column; gap: 4px; }
  .import { padding: 20px 16px; }
  .url-row { flex-wrap: wrap; }
  .url-row code { flex-basis: 100%; order: 3; white-space: normal; word-break: break-all; }

  .table-hero { padding: 34px 16px 20px; }
  .table-id { gap: 14px; align-items: flex-start; }
  .table-id .symbol { font-size: 42px; }
  .table-id h1 { font-size: 30px; }
  .table-side { width: 100%; flex-direction: row; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
  .table-stats { gap: 18px; }
  .table-stats .stat b { font-size: 17px; }

  .controls { padding: 12px 16px; gap: 8px; }
  .search { flex-basis: 100%; }
  .controls select { flex: 1 1 42%; max-width: none; }
  .controls .reset-btn { flex: 0 0 auto; }

  .resultbar { padding: 11px 16px 0; flex-direction: column; align-items: flex-start; gap: 4px; }

  .bands { padding: 8px 16px 50px; }
  .band summary { grid-template-columns: 34px auto 1fr auto; gap: 10px; padding: 13px 13px; }
  .band .desc { display: none; }
  .band .chev { display: none; }
  .band .name { font-size: 18px; }
  .band-body { padding: 0 12px 10px; }

  .chart { grid-template-columns: 26px minmax(0, 1fr); gap: 7px 9px; padding: 7px 6px; }
  .chart .hash { grid-column: 2; justify-self: start; font-size: 9.5px; }
  .chart .sha { display: none; }

  .footer-inner { padding: 22px 16px; flex-direction: column; gap: 4px; }

  .topbar-inner { height: auto; min-height: 58px; padding: 9px 16px; flex-wrap: wrap; }
  .nav { flex-wrap: wrap; justify-content: flex-end; row-gap: 2px; }

  .faq-hero { padding: 44px 16px 22px; }
  .faq-hero-inner { grid-template-columns: 1fr; gap: 22px; }
  .faq-hero h1 { letter-spacing: 0.1em; }
  .faq-toc { padding: 14px 16px; }
  .faq { padding-top: 26px; }
  .faq h2 { font-size: 20px; scroll-margin-top: 112px; }
  .faq h3 { font-size: 16px; }
  .faq p, .faq li { font-size: 13.5px; }
  .faq table { font-size: 12px; }
  .faq th, .faq td { padding: 6px 7px; }
}

@media (prefers-reduced-motion: no-preference) {
  .hero > *:not(.hero-mountains) { animation: rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .hero h1 { animation-delay: 0.05s; }
  .hero-sub { animation-delay: 0.1s; }
  .hero-meta { animation-delay: 0.15s; }
  .card.easy { animation: rise 0.7s 0.18s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .card.hard { animation: rise 0.7s 0.24s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}