/* ============================================================
   多语言速算工具箱 · Lingo Calc Tools
   Candy 缤纷风：高明度多彩、圆润、波点、轻快动效
   ============================================================ */

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

:root {
  /* —— 品牌色板（严格按规范） —— */
  --c-primary: #bfab22;          /* 主色 */
  --c-accent: #3bcebc;           /* 辅助色 */
  --c-cta: #4419e6;              /* 强调色 CTA */
  --c-bg: #fbfbf8;               /* 页面背景 */
  --c-surface: #ffffff;          /* 卡片/表面 */
  --c-text: #2c2a1b;             /* 正文 */
  --c-text-2: #7a765c;           /* 次要文字 */
  --c-border: #e6e5db;           /* 描边 */

  /* —— 色板派生柔和浅色（同色相浅化，用于背景块/波点） —— */
  --c-primary-soft: #f6f1d5;
  --c-accent-soft: #ddf6f2;
  --c-cta-soft: #ece8fb;

  --c-ok: #2e9e63;  --c-ok-soft: #e2f5ea;
  --c-err: #e0483d; --c-err-soft: #fdecea;

  /* —— 圆角 —— */
  --r-lg: 20px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* —— 字体 —— */
  --font-head: 'Quicksand', 'PingFang SC', system-ui, -apple-system, sans-serif;
  --font-body: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;

  /* —— 阴影 —— */
  --shadow-sm: 0 2px 8px rgba(44,42,27,.06);
  --shadow: 0 12px 32px rgba(44,42,27,.09);
  --shadow-lg: 0 20px 48px rgba(68,25,230,.18);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--c-text);
  background-color: var(--c-bg);
  /* 全屏波点装饰：黄色 + 青色两组错位圆点 */
  background-image:
    radial-gradient(circle, rgba(191,171,34,.10) 0 2px, transparent 2.6px),
    radial-gradient(circle, rgba(59,206,188,.12) 0 2px, transparent 2.6px);
  background-size: 30px 30px, 46px 46px;
  background-position: 0 0, 23px 27px;
  background-attachment: fixed;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; }
img, svg { display: block; max-width: 100%; }

:focus-visible { outline: 3px solid var(--c-cta); outline-offset: 2px; border-radius: 8px; }

.wrap { width: min(1100px, 100% - 2rem); margin-inline: auto; }
main { flex: 1; padding-bottom: 3.5rem; }

.skip-link {
  position: absolute; left: 1rem; top: -70px; z-index: 200;
  background: var(--c-cta); color: #fff; padding: .55rem 1.1rem;
  border-radius: var(--r-pill); transition: top .2s;
}
.skip-link:focus { top: 1rem; }

/* ============ 顶部导航（悬浮胶囊） ============ */
.site-header { position: sticky; top: 10px; z-index: 100; }

.header-inner {
  display: flex; align-items: center; gap: .9rem;
  margin-top: .6rem;
  padding: .55rem .75rem .55rem .55rem;
  background: rgba(255,255,255,.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-pill);
  box-shadow: var(--shadow-sm);
}

.brand { display: flex; align-items: center; gap: .6rem; flex-shrink: 0; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 15px;
  display: grid; place-items: center; font-size: 21px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  box-shadow: 0 6px 16px rgba(191,171,34,.4);
  transform: rotate(-6deg);
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}
.brand:hover .brand-mark { transform: rotate(8deg) scale(1.1); }
.brand-name { font-family: var(--font-head); font-weight: 700; font-size: 1.03rem; letter-spacing: .2px; }

.site-nav { display: flex; gap: .25rem; margin-inline: auto; overflow-x: auto; scrollbar-width: none; }
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
  white-space: nowrap; padding: .45rem .9rem; border-radius: var(--r-pill);
  font-size: .92rem; font-weight: 600; color: var(--c-text-2);
  transition: background .2s, color .2s, transform .2s;
}
.site-nav a:hover { background: var(--c-primary-soft); color: var(--c-text); transform: translateY(-1px); }
.site-nav a.active {
  background: var(--c-cta); color: #fff;
  box-shadow: 0 6px 16px rgba(68,25,230,.32);
}

/* —— 语言切换器 —— */
.lang { position: relative; flex-shrink: 0; }
.lang-toggle {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .5rem .95rem; border-radius: var(--r-pill);
  background: var(--c-cta-soft); border: 1.5px solid var(--c-border);
  font-weight: 700; font-size: .9rem; color: var(--c-text);
  transition: border-color .2s, transform .2s;
}
.lang-toggle:hover { border-color: var(--c-cta); transform: translateY(-1px); }
.lang-toggle .chev { font-size: .75em; color: var(--c-text-2); transition: transform .2s; }
.lang.open .lang-toggle .chev { transform: rotate(180deg); }
.lang.open .lang-toggle { border-color: var(--c-cta); }

.lang-menu {
  position: absolute; right: 0; top: calc(100% + 10px);
  width: 300px; padding: .7rem;
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  display: grid; grid-template-columns: 1fr 1fr; gap: .35rem;
  transform-origin: top right;
  animation: popIn .22s cubic-bezier(.34,1.56,.64,1);
  z-index: 120;
}
.lang-menu[hidden] { display: none; }
.lang-menu button {
  display: flex; align-items: center; gap: .5rem;
  padding: .55rem .7rem; border-radius: 14px;
  font-weight: 600; font-size: .9rem; text-align: left;
  transition: background .15s, transform .15s;
}
.lang-menu button:hover { background: var(--c-primary-soft); transform: translateX(2px); }
.lang-menu button.current { background: var(--c-cta-soft); color: var(--c-cta); }
.lang-menu .flag { font-size: 1.15rem; }

/* ============ 首页 Hero ============ */
.hero {
  position: relative;
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 2rem; align-items: center;
  padding: 3.4rem 0 2.6rem;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--c-primary-soft); color: #6b5f12;
  border: 1.5px solid rgba(191,171,34,.5);
  padding: .45rem 1rem; border-radius: var(--r-pill);
  font-weight: 700; font-size: .85rem; letter-spacing: .2px;
  margin-bottom: 1.1rem;
}
.hero h1 {
  font-family: var(--font-head); font-weight: 700;
  font-size: clamp(2.1rem, 5vw, 3.3rem);
  line-height: 1.12; letter-spacing: .3px;
  margin-bottom: .9rem;
}
.hero-sub { color: var(--c-text-2); font-size: 1.06rem; max-width: 30rem; margin-bottom: 1.6rem; }

.hero-actions { display: flex; gap: .8rem; flex-wrap: wrap; margin-bottom: 1.5rem; }

.hero-chips { list-style: none; display: flex; gap: .6rem; flex-wrap: wrap; }
.hero-chips li {
  display: inline-flex; align-items: center; gap: .35rem;
  background: var(--c-surface); border: 1.5px solid var(--c-border);
  border-radius: var(--r-pill); padding: .4rem .85rem;
  font-size: .85rem; font-weight: 600; color: var(--c-text-2);
}

/* Hero 右侧装饰艺术 */
.hero-art { position: relative; height: 300px; display: grid; place-items: center; }
.hero-dots-ring {
  position: absolute; width: 250px; height: 250px; border-radius: 50%;
  background-image:
    radial-gradient(circle, rgba(68,25,230,.22) 0 3px, transparent 4px),
    radial-gradient(circle, rgba(59,206,188,.28) 0 3px, transparent 4px);
  background-size: 26px 26px, 38px 38px;
  background-position: 0 0, 19px 19px;
  animation: spin 40s linear infinite;
}
.hero-blob {
  position: absolute; width: 108px; height: 108px; border-radius: 34px;
  display: grid; place-items: center; font-size: 46px;
  box-shadow: var(--shadow);
  animation: floaty 5s ease-in-out infinite;
  --tilt: 0deg;
}
.hero-blob.b1 { background: var(--c-primary-soft); top: 4%; left: 6%; --tilt: -8deg; animation-delay: 0s; }
.hero-blob.b2 { background: var(--c-accent-soft); top: 46%; right: 2%; --tilt: 6deg; animation-delay: .7s; }
.hero-blob.b3 { background: var(--c-cta-soft); bottom: 2%; left: 12%; --tilt: -4deg; animation-delay: 1.4s; }

/* ============ 首页标题区 ============ */
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; margin: 1.6rem 0 1.2rem; }
.section-title { font-family: var(--font-head); font-size: 1.5rem; font-weight: 700; }
.section-note { color: var(--c-text-2); font-size: .9rem; }

/* ============ 工具卡片 ============ */
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }

.tool-card {
  position: relative;
  display: flex; flex-direction: column; gap: .7rem;
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 1.5rem 1.4rem 1.3rem;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .25s cubic-bezier(.34,1.56,.64,1), box-shadow .25s;
}
.tool-card::after { /* 卡角波点 */
  content: ''; position: absolute; right: -18px; top: -18px; width: 84px; height: 84px;
  background-image: radial-gradient(circle, rgba(191,171,34,.16) 0 2.5px, transparent 3px);
  background-size: 12px 12px; pointer-events: none;
}
.tool-card:hover { transform: translateY(-7px) rotate(-.6deg); box-shadow: var(--shadow-lg); }
.tool-card:hover .tool-emoji { transform: rotate(-10deg) scale(1.12); }

.tool-emoji {
  width: 58px; height: 58px; border-radius: 19px;
  display: grid; place-items: center; font-size: 28px;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}
.tool-card:nth-child(1) .tool-emoji { background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); }
.tool-card:nth-child(2) .tool-emoji { background: linear-gradient(135deg, var(--c-accent), var(--c-cta)); }
.tool-card:nth-child(3) .tool-emoji { background: linear-gradient(135deg, var(--c-cta), var(--c-primary)); }
.tool-card:nth-child(4) .tool-emoji { background: linear-gradient(135deg, var(--c-primary), var(--c-cta)); }
.tool-card:nth-child(5) .tool-emoji { background: linear-gradient(135deg, var(--c-accent), var(--c-primary)); }

.tool-card h3 { font-family: var(--font-head); font-size: 1.18rem; font-weight: 700; }
.tool-card p { color: var(--c-text-2); font-size: .92rem; flex: 1; }

.tool-go {
  display: inline-flex; align-items: center; gap: .35rem;
  align-self: flex-start; color: var(--c-cta); font-weight: 700; font-size: .92rem;
}
.tool-go::after { content: '→'; transition: transform .2s; }
.tool-card:hover .tool-go::after { transform: translateX(4px); }

/* ============ 工具页页头 ============ */
.page-head { position: relative; padding: 2.6rem 0 1.2rem; }
.page-head::before { /* 页头左上波点装饰 */
  content: ''; position: absolute; left: -40px; top: 10px; width: 140px; height: 140px;
  background-image: radial-gradient(circle, rgba(59,206,188,.18) 0 3px, transparent 4px);
  background-size: 22px 22px; pointer-events: none;
}
.page-kicker {
  display: inline-grid; place-items: center;
  width: 58px; height: 58px; border-radius: 19px; font-size: 28px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  box-shadow: 0 8px 20px rgba(191,171,34,.35);
  margin-bottom: .9rem; transform: rotate(-6deg);
}
.page-head h1 { font-family: var(--font-head); font-size: clamp(1.6rem, 4vw, 2.3rem); font-weight: 700; letter-spacing: .3px; margin-bottom: .4rem; }
.page-head .page-desc { color: var(--c-text-2); max-width: 40rem; }

/* ============ 面板 ============ */
.panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 1.4rem; }
.panel-grid.single { grid-template-columns: 1fr; max-width: 780px; }

.panel {
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  animation: fadeUp .5s ease both;
}
.panel:nth-child(2) { animation-delay: .08s; }
.panel > h2 { font-family: var(--font-head); font-size: 1.2rem; font-weight: 700; margin-bottom: 1.1rem; display: flex; align-items: center; gap: .5rem; }
.panel > h2::before {
  content: ''; width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0;
  background: var(--c-primary);
}
.panel.alt > h2::before { background: var(--c-accent); }

/* —— 表单 —— */
.field { display: flex; flex-direction: column; gap: .45rem; margin-bottom: 1rem; }
.field label { font-weight: 700; font-size: .85rem; color: var(--c-text-2); }
.field input, .field select, .field textarea {
  width: 100%; font-size: 1rem; color: var(--c-text);
  background: var(--c-surface);
  border: 2px solid var(--c-border);
  border-radius: 16px;
  padding: .72rem .9rem;
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; min-height: 240px; line-height: 1.5; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92rem; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--c-cta);
  box-shadow: 0 0 0 4px var(--c-cta-soft);
}
.field-row { display: flex; gap: .6rem; }
.field-row > :first-child { flex: 1; min-width: 0; }

.check-row { display: flex; align-items: center; gap: .55rem; font-size: .9rem; font-weight: 600; color: var(--c-text-2); margin: .2rem 0 1rem; }
.check-row input { width: 18px; height: 18px; accent-color: var(--c-cta); cursor: pointer; }

.actions { display: flex; gap: .6rem; flex-wrap: wrap; margin-bottom: 1.1rem; }

/* —— 按钮 —— */
.btn {
  display: inline-flex; align-items: center; gap: .5rem; justify-content: center;
  font-weight: 700; font-size: .95rem; line-height: 1;
  padding: .72rem 1.35rem; border-radius: var(--r-pill);
  border: 2px solid transparent;
  transition: transform .18s cubic-bezier(.34,1.56,.64,1), box-shadow .18s, background .18s, border-color .18s;
}
.btn:active { transform: scale(.94); }
.btn-primary { background: var(--c-cta); color: #fff; box-shadow: 0 10px 22px rgba(68,25,230,.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(68,25,230,.4); }
.btn-accent { background: var(--c-accent); color: #08302b; box-shadow: 0 10px 22px rgba(59,206,188,.35); }
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(59,206,188,.45); }
.btn-sun { background: var(--c-primary); color: #3a330a; box-shadow: 0 10px 22px rgba(191,171,34,.35); }
.btn-sun:hover { transform: translateY(-2px); }
.btn-ghost { background: var(--c-surface); border-color: var(--c-border); color: var(--c-text); }
.btn-ghost:hover { border-color: var(--c-cta); color: var(--c-cta); transform: translateY(-2px); }
.btn[disabled] { opacity: .55; pointer-events: none; }

/* —— 消息 —— */
.msg {
  display: flex; align-items: flex-start; gap: .5rem;
  padding: .7rem .95rem; border-radius: var(--r-lg);
  font-size: .9rem; font-weight: 600; margin-bottom: 1rem;
  animation: popIn .25s ease;
}
.msg-ok { background: var(--c-ok-soft); color: #1c6b42; }
.msg-err { background: var(--c-err-soft); color: #a0342c; }
.msg-info { background: var(--c-accent-soft); color: #0d5a52; }

/* —— 结果网格 —— */
.result-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: .7rem;
  list-style: none;
}
.result-grid > div {
  background: var(--c-bg);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: .8rem .95rem;
}
.result-grid dt { font-size: .78rem; font-weight: 700; color: var(--c-text-2); text-transform: uppercase; letter-spacing: .4px; margin-bottom: .2rem; }
.result-grid dd { font-size: 1.02rem; font-weight: 700; word-break: break-all; }

/* —— 大结果 —— */
.big-result {
  margin-top: .4rem;
  background: linear-gradient(135deg, var(--c-cta-soft), var(--c-accent-soft));
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 1.3rem 1.4rem;
  animation: popIn .3s ease;
}
.big-result .r-label { font-size: .8rem; font-weight: 700; color: var(--c-text-2); margin-bottom: .35rem; }
.big-result .r-value { font-family: var(--font-head); font-size: clamp(1.5rem, 4vw, 2.1rem); font-weight: 700; letter-spacing: .3px; word-break: break-all; }
.big-result .r-sub { margin-top: .35rem; font-size: .85rem; color: var(--c-text-2); font-weight: 600; }

/* —— 快捷货币 —— */
.quick-list { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .9rem; }
.quick-chip {
  padding: .4rem .8rem; border-radius: var(--r-pill);
  background: var(--c-bg); border: 1.5px solid var(--c-border);
  font-weight: 700; font-size: .82rem; color: var(--c-text-2);
  transition: background .18s, transform .18s, color .18s;
}
.quick-chip:hover { background: var(--c-accent-soft); color: var(--c-text); transform: translateY(-2px); }

/* ============ 标签页 ============ */
.tabs {
  display: flex; gap: .4rem;
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  padding: .4rem; border-radius: var(--r-pill);
  overflow-x: auto; scrollbar-width: none; margin-bottom: 1.3rem;
}
.tabs::-webkit-scrollbar { display: none; }
.tabs button {
  white-space: nowrap; padding: .55rem 1.3rem; border-radius: var(--r-pill);
  font-weight: 700; font-size: .95rem; color: var(--c-text-2);
  transition: background .2s, color .2s, transform .2s;
}
.tabs button:hover { background: var(--c-primary-soft); color: var(--c-text); }
.tabs button.active { background: var(--c-cta); color: #fff; box-shadow: 0 8px 18px rgba(68,25,230,.32); }

.tab-pane { display: none; animation: fadeUp .35s ease both; }
.tab-pane.active { display: block; }

/* ============ 表格 ============ */
.table-wrap {
  overflow: auto; margin-top: 1rem;
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-lg);
}
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { padding: .68rem .9rem; text-align: left; border-bottom: 1px solid var(--c-border); white-space: nowrap; }
th { background: var(--c-primary-soft); font-family: var(--font-head); font-weight: 700; font-size: .85rem; }
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background .15s; }
tbody tr:hover { background: var(--c-bg); }
tbody tr.matched { background: var(--c-cta-soft); box-shadow: inset 4px 0 0 var(--c-cta); }
tbody tr.matched td { font-weight: 700; }

/* ============ 迷你对照（单位换算） ============ */
.mini-table { display: grid; grid-template-columns: repeat(2, 1fr); gap: .6rem; margin-top: 1rem; }
.mini-row {
  display: flex; justify-content: space-between; align-items: center; gap: .5rem;
  background: var(--c-bg); border: 1.5px solid var(--c-border);
  border-radius: 15px; padding: .55rem .8rem; font-size: .9rem;
}
.mini-row b { font-weight: 700; color: var(--c-text-2); }

/* ============ 徽章 ============ */
.badge {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .18rem .55rem; border-radius: var(--r-pill);
  font-size: .72rem; font-weight: 700;
  background: var(--c-accent-soft); color: #0d5a52;
}
.badge.warn { background: var(--c-primary-soft); color: #6b5f12; }
.badge.off { background: var(--c-cta-soft); color: var(--c-cta); }

.meta-line { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; margin-top: .7rem; font-size: .85rem; color: var(--c-text-2); font-weight: 600; }

/* ============ 页脚 ============ */
.site-footer { padding: 1.8rem 0 2.2rem; text-align: center; color: var(--c-text-2); font-size: .88rem; }
.site-footer .footer-meta { margin-top: .3rem; font-size: .8rem; opacity: .8; }

/* ============ Toast ============ */
.toast {
  position: fixed; left: 50%; bottom: 2rem; transform: translateX(-50%) translateY(20px);
  background: var(--c-cta); color: #fff; font-weight: 700; font-size: .92rem;
  padding: .75rem 1.4rem; border-radius: var(--r-pill);
  box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none;
  transition: opacity .25s, transform .25s; z-index: 300;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============ 动画 ============ */
@keyframes floaty {
  0%, 100% { transform: translateY(0) rotate(var(--tilt, 0deg)); }
  50% { transform: translateY(-14px) rotate(var(--tilt, 0deg)); }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }
@keyframes popIn { from { opacity: 0; transform: scale(.92); } to { opacity: 1; transform: scale(1); } }

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

/* ============ 响应式 ============ */
@media (max-width: 880px) {
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .panel-grid { grid-template-columns: 1fr; }
  .hero { grid-template-columns: 1fr; padding-top: 2.2rem; }
  .hero-art { height: 230px; }
}

@media (max-width: 640px) {
  .site-nav { display: none; }
  .tool-grid { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: 1fr; }
  .mini-table { grid-template-columns: 1fr; }
  .lang-menu { width: 260px; }
  .brand-name { display: none; }
  .header-inner { padding-right: .55rem; }
}