/* ===================================================================
   趣味数独 · 聪明格  — 前台设计系统
   柔和明亮 · 童趣轻松 · 响应式
   =================================================================== */

:root {
  --blue: #4ea8de;
  --blue-deep: #3a8cc4;
  --blue-soft: #d8ecfa;
  --orange: #ff9e4f;
  --orange-soft: #ffe8d3;
  --pink: #ff7fa5;
  --pink-soft: #ffe0eb;
  --green: #5ec894;
  --green-soft: #d9f3e6;
  --yellow: #ffce54;
  --yellow-soft: #fff3d1;
  --purple: #9b8cff;
  --ink: #3a4a5a;
  --ink-light: #7a8a9a;
  --bg-top: #eaf5fd;
  --bg-bottom: #fff6f0;
  --card: #ffffff;
  --radius: 22px;
  --shadow-sm: 0 4px 14px rgba(78, 140, 200, .10);
  --shadow-md: 0 10px 30px rgba(78, 140, 200, .16);
  --shadow-lg: 0 18px 46px rgba(78, 140, 200, .22);
}

* { -webkit-tap-highlight-color: transparent; }

html, body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  background: linear-gradient(160deg, var(--bg-top) 0%, var(--bg-bottom) 55%, #fff 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}

a { text-decoration: none; color: var(--blue-deep); }
a:hover { color: var(--blue); }

/* 浮动装饰气泡 */
.bubbles { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.bubble {
  position: absolute; border-radius: 50%; opacity: .35;
  animation: floaty 12s ease-in-out infinite;
}
@keyframes floaty {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-26px) rotate(8deg); }
}

.main-wrap { position: relative; }

/* ---------- 导航栏 ---------- */
.navbar-fun {
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(60, 120, 180, .08);
  border-bottom: 1px solid rgba(78, 168, 222, .12);
}
.navbar-fun .brand-logo {
  width: 42px; height: 42px; border-radius: 13px;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 16px rgba(78, 168, 222, .4);
}
.navbar-fun .brand-text {
  font-weight: 800; font-size: 1.25rem; letter-spacing: .5px;
  background: linear-gradient(90deg, var(--blue-deep), var(--purple));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.navbar-fun .nav-link {
  font-weight: 600; color: var(--ink); margin: 0 4px; border-radius: 12px;
  padding: 8px 14px; transition: .2s;
}
.navbar-fun .nav-link:hover, .navbar-fun .nav-link.active {
  background: var(--blue-soft); color: var(--blue-deep);
}

/* ---------- 按钮 ---------- */
.btn-fun {
  border: none; border-radius: 999px; font-weight: 700;
  padding: 10px 22px; transition: transform .15s, box-shadow .15s;
  color: #fff; background: linear-gradient(135deg, var(--blue), var(--purple));
  box-shadow: 0 8px 20px rgba(90, 140, 230, .35);
}
.btn-fun:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(90, 140, 230, .45); color: #fff; }
.btn-fun:active { transform: translateY(0); }

.btn-fun-orange { background: linear-gradient(135deg, var(--orange), #ff7a59); box-shadow: 0 8px 20px rgba(255, 150, 80, .4); }
.btn-fun-pink { background: linear-gradient(135deg, var(--pink), #ff6d95); box-shadow: 0 8px 20px rgba(255, 130, 165, .4); }
.btn-fun-green { background: linear-gradient(135deg, var(--green), #3fb98a); box-shadow: 0 8px 20px rgba(94, 200, 148, .4); }

.btn-fun-outline {
  background: #fff; color: var(--blue-deep); border: 2px solid var(--blue-soft);
  box-shadow: none;
}
.btn-fun-outline:hover { background: var(--blue-soft); color: var(--blue-deep); }

.btn-fun:disabled { opacity: .55; transform: none; }

/* ---------- 卡片 ---------- */
.card-fun {
  background: var(--card); border: none; border-radius: var(--radius);
  box-shadow: var(--shadow-md); transition: transform .2s, box-shadow .2s;
  overflow: hidden;
}
.card-fun:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; border-radius: 30px; overflow: hidden;
  background: linear-gradient(135deg, #dff0fb 0%, #ffe9f1 60%, #fff3e0 100%);
  padding: 48px 32px; box-shadow: var(--shadow-md);
}
.hero h1 {
  font-weight: 900; font-size: clamp(1.9rem, 4.5vw, 3.2rem); line-height: 1.2;
  background: linear-gradient(90deg, var(--blue-deep), var(--purple), var(--pink));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .hero-badge { display: inline-block; background: #fff; border-radius: 999px; padding: 6px 16px; font-weight: 700; color: var(--orange); box-shadow: var(--shadow-sm); }
.hero-shape { position: absolute; border-radius: 30px; opacity: .5; }

/* ---------- 等级卡片 ---------- */
.level-card {
  position: relative; border-radius: var(--radius); padding: 22px; height: 100%;
  background: #fff; box-shadow: var(--shadow-sm); transition: .22s;
  border: 2px solid transparent;
}
.level-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.level-card.level-locked { filter: grayscale(.55); opacity: .72; background: #f4f7fa; }
.level-card.level-done { border-color: var(--green); background: linear-gradient(180deg, #fff, #f3fdf8); }
.level-num {
  width: 52px; height: 52px; border-radius: 16px; display: flex;
  align-items: center; justify-content: center; font-weight: 900; font-size: 1.5rem;
  color: #fff; background: linear-gradient(135deg, var(--blue), var(--purple));
  box-shadow: 0 8px 18px rgba(90, 140, 230, .35);
}
.level-card:nth-child(4n+2) .level-num { background: linear-gradient(135deg, var(--orange), #ff7a59); }
.level-card:nth-child(4n+3) .level-num { background: linear-gradient(135deg, var(--pink), #ff6d95); }
.level-card:nth-child(4n+4) .level-num { background: linear-gradient(135deg, var(--green), #3fb98a); }

.level-name { font-weight: 800; font-size: 1.15rem; margin: 12px 0 4px; }
.level-tag { font-size: .78rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; }
.tag-size { background: var(--blue-soft); color: var(--blue-deep); }
.tag-vip { background: var(--yellow-soft); color: #c98a00; }
.tag-free { background: var(--green-soft); color: #2f9e6f; }
.progress-fun { height: 10px; border-radius: 999px; background: #eef3f7; overflow: hidden; }
.progress-fun .bar { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--green), #7ed9ab); transition: width .4s; }

.lock-icon {
  width: 46px; height: 46px; border-radius: 50%; background: #e3eaf0; color: #8b9aaa;
  display: inline-flex; align-items: center; justify-content: center;
}

/* ---------- 游戏棋盘 ---------- */
.game-shell { display: flex; flex-direction: column; align-items: center; gap: 22px; }
.board-wrap {
  background: #fff; border-radius: 24px; padding: 18px; box-shadow: var(--shadow-lg);
  max-width: 100%;
}
.sudoku-grid {
  display: grid; gap: 1px; background: #c9d8e6; border: 3px solid #5b7a96;
  border-radius: 8px; overflow: hidden; user-select: none;
  width: min(92vw, 540px);
  max-width: 100%;
}
.cell {
  position: relative; background: #fff; display: flex; align-items: center;
  justify-content: center; font-weight: 700; color: var(--ink);
  cursor: pointer; transition: background .12s;
  aspect-ratio: 1 / 1;
  min-width: 0;
  min-height: 0;
  font-size: var(--cell-fs, 24px);
}
.cell.empty { color: var(--blue-deep); }
.cell.given { color: #97a7b8; font-weight: 600; }
.cell.selected { background: #cfe8fb !important; box-shadow: inset 0 0 0 2px var(--blue); }
.cell.correct { background: #d9f3e6 !important; color: #2f9e6f; }
.cell.wrong { background: #ffdfe7 !important; color: #e0486d; }
.cell.hint-flash { animation: hintpop .6s; background: #fff3d1 !important; }
@keyframes hintpop { 0% { transform: scale(.7); } 60% { transform: scale(1.15); } 100% { transform: scale(1); } }

.cell .cage-label {
  position: absolute; top: 1px; left: 2px; font-size: .58em; font-weight: 800;
  color: #54657a; line-height: 1; pointer-events: none;
}

/* 数字选择弹窗（移动端） */
.num-pad {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 1050;
  background: #fff; border-radius: 26px 26px 0 0; padding: 20px;
  box-shadow: 0 -10px 40px rgba(40, 80, 120, .25);
  transform: translateY(105%); transition: transform .25s ease;
}
.num-pad.show { transform: translateY(0); }
.num-pad .num-btn {
  width: 58px; height: 58px; border-radius: 16px; border: none; font-size: 1.5rem;
  font-weight: 800; color: var(--blue-deep); background: var(--blue-soft);
  transition: transform .12s;
}
.num-pad .num-btn:active { transform: scale(.9); background: var(--blue); color: #fff; }

/* ---------- 证书 ---------- */
.cert-card {
  border-radius: 26px; padding: 10px;
  background: linear-gradient(135deg, #fff, #fdf3ff);
  box-shadow: var(--shadow-md);
}
.cert-canvas { width: 100%; border-radius: 18px; display: block; }

/* ---------- 表单 ---------- */
.auth-card { max-width: 440px; margin: 0 auto; }
.form-control-fun {
  border-radius: 14px; border: 2px solid #e6eef5; padding: 12px 16px; font-size: 1rem;
  transition: .2s;
}
.form-control-fun:focus { border-color: var(--blue); box-shadow: 0 0 0 4px var(--blue-soft); }

/* ---------- 提示条 ---------- */
.alert-fun { border: none; border-radius: 16px; font-weight: 600; }

/* ---------- 会员价格卡 ---------- */
.price-card { border-radius: 26px; padding: 34px; text-align: center; background: #fff; box-shadow: var(--shadow-md); position: relative; overflow: hidden; }
.price-card .price { font-size: 3rem; font-weight: 900; color: var(--orange); }
.price-card .price small { font-size: 1.1rem; font-weight: 600; color: var(--ink-light); }

/* ---------- 关卡大厅 banner ---------- */
.level-banner {
  position: relative; border-radius: 28px; overflow: hidden;
  padding: 40px 36px;
  background: linear-gradient(135deg, #dff0fb 0%, #f3e8ff 45%, #fff3e0 100%);
  box-shadow: var(--shadow-md);
}
.level-banner h1 {
  font-weight: 900; font-size: clamp(1.7rem, 4vw, 2.6rem); line-height: 1.25;
  background: linear-gradient(90deg, var(--blue-deep), var(--purple), var(--orange));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.level-banner .banner-shape { position: absolute; border-radius: 30px; opacity: .45; pointer-events: none; }
.banner-grid-float { animation: floaty 6s ease-in-out infinite; }
.banner-grid-float.delay { animation-delay: 1.5s; }

/* ---------- 内容文章页 ---------- */
.content-article { color: var(--ink); line-height: 1.85; }
.content-article h3 { font-weight: 800; margin-bottom: 1rem; color: var(--ink); }
.content-article h4 { font-weight: 700; margin: 1.4rem 0 .6rem; color: var(--blue-deep); font-size: 1.15rem; }
.content-article p { margin-bottom: .8rem; color: #4a5a6a; }
.content-article ul, .content-article ol { margin-bottom: .8rem; padding-left: 1.3rem; }
.content-article li { margin-bottom: .35rem; color: #4a5a6a; }

/* ---------- 页脚 ---------- */
.footer-fun {
  margin-top: 70px; color: var(--ink-light);
  border-top: 1px solid #e4eef5; font-size: .92rem;
  background: #fff; box-shadow: 0 -6px 30px rgba(60, 120, 180, .05);
}
.footer-title { font-weight: 800; margin-bottom: 14px; color: var(--ink); font-size: .95rem; }
.footer-link { display: block; color: var(--ink-light); margin-bottom: 8px; font-size: .9rem; transition: .15s; }
.footer-link:hover { color: var(--blue-deep); }
.footer-bottom {
  border-top: 1px solid #eef1f5; padding: 16px 0; text-align: center; font-size: .85rem;
}

/* ---------- 通用工具 ---------- */
.text-blue { color: var(--blue-deep) !important; }
.text-orange { color: var(--orange) !important; }
.text-pink { color: var(--pink) !important; }
.bg-soft-blue { background: var(--blue-soft); }
.section-title { font-weight: 900; font-size: 1.6rem; }
.badge-soft { background: var(--blue-soft); color: var(--blue-deep); font-weight: 700; }

@media (max-width: 576px) {
  .hero { padding: 32px 20px; border-radius: 22px; }
  .btn-fun { padding: 9px 18px; }
}

/* ---------- 前台分页 ---------- */
.pagination { gap: 6px; flex-wrap: wrap; }
.pagination .page-item .page-link {
  border: none; border-radius: 12px; padding: 8px 15px; margin: 0;
  color: var(--blue-deep); font-weight: 600; background: #fff;
  box-shadow: var(--shadow-sm); transition: .15s;
}
.pagination .page-item .page-link:hover { background: var(--blue-soft); color: var(--blue-deep); }
.pagination .page-item.active .page-link {
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff; box-shadow: 0 8px 18px rgba(90, 140, 230, .35);
}
.pagination .page-item.disabled .page-link { color: #b8c4d4; background: #f4f7fa; box-shadow: none; }