/* ===== 凡弦问道 全局样式（青绿山水风） =====
 * 配色参考《千里江山图》青绿山水体系 + 绢纸质感：
 * 绢色为底、青碧为主、赭金点缀、朱砂印章，宋体衬线标题
 */
:root {
  --bg: #f4efe3;          /* 绢色底 */
  --bg-soft: #faf7ee;     /* 浅绢（输入框/栏头） */
  --paper-deep: #e4dcc8;  /* 深绢（背景块/遮罩） */
  --card: #fdfbf4;        /* 卡片白 */
  --line: rgba(47,60,50,.14);
  --border: var(--line);
  --text: #2b2a26;        /* 墨色 */
  --muted: #7c776a;       /* 淡墨 */
  --accent: #2e6e5e;      /* 青碧（主操作/链接/高亮） */
  --accent-dark: #235a4d;
  --accent-2: #a87b3f;    /* 赭金（次要强调） */
  --seal: #9e3228;        /* 朱砂（印章/突破） */
  --danger: #8a2e23;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(62,84,70,.10);
  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding-bottom: env(safe-area-inset-bottom);
  background-image:
    radial-gradient(ellipse 90% 60% at 50% 0%, rgba(255,253,248,.55), transparent 60%),
    radial-gradient(ellipse 70% 50% at 100% 100%, rgba(46,110,94,.05), transparent 55%);
}

h1, h2, .logo, .hero-sub, .ex-name, .day-title, .stat-num, .bt-level {
  font-family: var(--serif);
}

.container {
  width: min(1080px, 92%);
  margin: 0 auto;
}

/* ===== 头部 ===== */
.site-header {
  background: rgba(248,243,233,.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}
.logo {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 9px;
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.logo::before {
  content: "";
  display: inline-block;
  width: 38px;
  height: 26px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 30'%3E%3Crect x='2' y='9' width='44' height='19' rx='4' fill='%232e6e5e'/%3E%3Crect x='3.2' y='9' width='5.4' height='19' rx='1.5' fill='%23faf7ee'/%3E%3Crect x='9.8' y='9' width='5.4' height='19' rx='1.5' fill='%23faf7ee'/%3E%3Crect x='16.4' y='9' width='5.4' height='19' rx='1.5' fill='%23faf7ee'/%3E%3Crect x='23' y='9' width='5.4' height='19' rx='1.5' fill='%23faf7ee'/%3E%3Crect x='29.6' y='9' width='5.4' height='19' rx='1.5' fill='%23faf7ee'/%3E%3Crect x='36.2' y='9' width='5.4' height='19' rx='1.5' fill='%23faf7ee'/%3E%3Crect x='42.8' y='9' width='5.4' height='19' rx='1.5' fill='%23faf7ee'/%3E%3Crect x='6.6' y='3' width='3.6' height='13' rx='1' fill='%23235a4d'/%3E%3Crect x='13.2' y='3' width='3.6' height='13' rx='1' fill='%23235a4d'/%3E%3Crect x='26.4' y='3' width='3.6' height='13' rx='1' fill='%23235a4d'/%3E%3Crect x='33' y='3' width='3.6' height='13' rx='1' fill='%23235a4d'/%3E%3Crect x='39.6' y='3' width='3.6' height='13' rx='1' fill='%23235a4d'/%3E%3C/svg%3E") center / contain no-repeat;
}
.logo span { color: var(--text); white-space: nowrap; }
.main-nav { display: flex; min-width: 0; gap: 4px; }
.main-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 7px 15px;
  border-radius: 6px;
  font-weight: 600;
  font-size: .94rem;
  letter-spacing: 1px;
  transition: all .2s;
}
.main-nav a:hover { color: var(--text); background: rgba(118,106,72,.08); }
.main-nav a.active { color: var(--accent); background: rgba(46,110,94,.10); }

/* ===== Hero ===== */
.hero {
  padding: 46px 30px 38px;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-top: 22px;
  margin-bottom: 34px;
  background: var(--bg-soft);
  box-shadow: var(--shadow);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(36,33,29,.09);
  border-radius: 7px;
  pointer-events: none;
}
.hero h1 {
  position: relative;
  z-index: 1;
  font-size: 2.3rem;
  margin-bottom: 8px;
  letter-spacing: 8px;
  color: var(--text);
  text-shadow: 0 1px 0 rgba(255,255,255,.5);
}
.hero p { position: relative; z-index: 1; color: var(--muted); max-width: 660px; }
.hero .hero-sub {
  position: relative;
  z-index: 1;
  margin: -2px 0 12px;
  color: var(--accent-2);
  font-size: 1rem;
  letter-spacing: 4px;
}
.hero.small { padding: 30px 26px 26px; margin-top: 22px; border: 1px solid var(--line); background: var(--bg-soft); }
.hero.small h1 { font-size: 1.85rem; }
.hero-home {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  align-items: end;
  gap: 44px;
  padding: 30px 34px;
  margin-bottom: 26px;
}
.hero-home h1 { margin: 0 0 7px; font-size: 2.2rem; }
.hero-home .hero-sub { margin: 0 0 3px; font-size: .86rem; }
.hero-home .hero-copy > p:last-child { max-width: 720px; font-size: .94rem; line-height: 1.8; }
.course-progress {
  position: relative;
  z-index: 1;
  padding: 15px 17px;
  background: rgba(255,255,255,.42);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.progress-topline { display: flex; justify-content: space-between; gap: 12px; align-items: center; font-size: .84rem; color: var(--accent-2); }
.progress-topline strong { color: var(--text); font-size: .92rem; font-variant-numeric: tabular-nums; }
.progress-track { height: 6px; margin: 10px 0 8px; overflow: hidden; background: var(--paper-deep); border-radius: 99px; }
.progress-track span { display: block; width: 3.33%; height: 100%; background: var(--accent); border-radius: inherit; transition: width .35s ease; }
.course-progress p { font-size: .78rem; line-height: 1.6; }

/* ===== 卡片 ===== */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 26px;
  animation: card-in .45s ease-out both;
}
.card h2 { font-size: 1.12rem; margin-bottom: 18px; letter-spacing: 2px; }

@keyframes card-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 设置 ===== */
.settings-card { padding: 0; margin-top: 24px; }
.settings-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 2px;
}
.settings-summary::-webkit-details-marker { display: none; }
.settings-summary::after { content: "展开"; color: var(--accent); font-family: var(--sans); font-size: .78rem; font-weight: 600; letter-spacing: 1px; }
.settings-card[open] .settings-summary::after { content: "收起"; }
.settings-summary small { margin-left: auto; color: var(--muted); font-family: var(--sans); font-weight: 400; font-size: .78rem; letter-spacing: 0; }
.settings-card[open] .settings-summary { border-bottom: 1px solid var(--line); }
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  padding: 18px 20px 20px;
}
.setting-group label {
  display: block;
  font-size: .85rem;
  color: var(--muted);
  margin-bottom: 6px;
  font-weight: 600;
  letter-spacing: 1px;
}
.setting-group select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: .95rem;
  cursor: pointer;
  outline: none;
  transition: border .2s;
}
.setting-group select:focus { border-color: var(--accent); }
.setting-help { display: block; margin-top: 5px; color: var(--muted); font-size: .76rem; }

/* ===== 计划列表 ===== */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin: 30px 0 18px;
}
.section-head h2 { font-size: 1.3rem; letter-spacing: 3px; }
.plan-summary { color: var(--accent-2); font-weight: 600; font-size: .95rem; }

.plan-list { display: grid; gap: 18px; }
.today-section { margin-top: 16px; }
.today-section h2 { margin-bottom: 16px; letter-spacing: 2px; }
.plan-section { margin-top: 28px; }
.day-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  animation: card-in .45s ease-out both;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s;
}
.day-card:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(62,84,70,.12); border-color: rgba(46,110,94,.45); }
.day-card.today {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow);
  animation: card-in .45s ease-out both;
}
.day-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 18px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}
.day-title { font-weight: 700; font-size: 1rem; letter-spacing: 1px; display: flex; align-items: center; gap: 10px; }
.day-badge {
  font-size: .72rem;
  background: rgba(46,110,94,.12);
  color: var(--accent);
  padding: 3px 10px;
  border-radius: 14px;
  font-weight: 700;
  letter-spacing: 1px;
}
.day-meta { color: var(--muted); font-size: .82rem; }
.day-body { display: none; padding: 6px 18px 16px; }
.day-card.open .day-body { display: block; }
.day-card.today .day-body { display: block; }

.exercise-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px dashed rgba(36,33,29,.16);
}
.exercise-row:last-child { border-bottom: none; }
.ex-name { font-weight: 700; font-size: 1.02rem; letter-spacing: 2px; }
.ex-name small { display: block; color: var(--muted); font-weight: 400; font-size: .8rem; margin-top: 6px; letter-spacing: 2px; }
.ex-spec { color: var(--accent-2); font-weight: 600; white-space: nowrap; font-size: .92rem; }
.ex-detail { color: #4c463d; font-size: .9rem; line-height: 1.75; text-align: right; white-space: nowrap; }

/* ===== 今日训练 ===== */
.today-section { margin-top: 0; }
.today-heading { align-items: end; margin: 0 0 12px; }
.today-heading h2 { margin: 0; font-size: 1.45rem; letter-spacing: 3px; }
.section-kicker { display: block; margin-bottom: 2px; color: var(--accent-2); font-size: .76rem; font-weight: 700; letter-spacing: 3px; }
.today-card { padding: 0; overflow: hidden; }
.today-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 26px 18px;
  background: linear-gradient(110deg, rgba(46,110,94,.07), rgba(168,123,63,.035));
  border-bottom: 1px solid var(--line);
}
.today-card-head h2 { margin: 2px 0 5px; font-size: 1.3rem; }
.today-card-head p { color: var(--muted); font-size: .9rem; }
.today-eyebrow { color: var(--accent-2); font-size: .78rem; font-weight: 700; letter-spacing: 2px; }
.duration-seal { flex: 0 0 auto; padding: 6px 12px; color: var(--accent); background: rgba(46,110,94,.1); border-radius: 99px; font-size: .78rem; font-weight: 700; }
.practice-toolbar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}
.practice-toolbar span { padding: 9px 14px; background: var(--bg-soft); color: var(--muted); font-size: .78rem; text-align: center; }
.practice-toolbar b { margin-right: 4px; color: var(--text); }
.practice-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 24px; padding: 7px 26px; }
.practice-step { padding: 16px 0; border-bottom: 1px dashed rgba(36,33,29,.16); }
.step-head { display: grid; grid-template-columns: 28px 1fr auto; gap: 10px; align-items: center; }
.step-index { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; color: var(--bg-soft); background: var(--accent); border-radius: 50%; font-family: var(--serif); font-size: .72rem; }
.step-head h3 { font-family: var(--serif); font-size: .98rem; letter-spacing: 2px; }
.step-head small { display: block; margin-top: 1px; color: var(--muted); font-size: .72rem; }
.step-time { color: var(--accent-2); font-size: .78rem; font-weight: 700; white-space: nowrap; }
.practice-step > p { margin: 10px 0 0 38px; color: #4c463d; font-size: .86rem; line-height: 1.75; }
.completion-standard, .extra-practice {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 12px;
  margin: 12px 26px 0;
  padding: 11px 14px;
  border-radius: 7px;
  font-size: .82rem;
}
.completion-standard { background: rgba(46,110,94,.07); border: 1px solid rgba(46,110,94,.18); }
.completion-standard b { color: var(--accent); }
.extra-practice { background: rgba(168,123,63,.07); border: 1px solid rgba(168,123,63,.2); }
.extra-practice b { color: var(--accent-2); }
.instrument-note { display: flex; gap: 10px; align-items: center; margin: 12px 26px 0; padding: 9px 12px; color: var(--muted); background: var(--bg-soft); border: 1px solid var(--line); border-radius: 7px; font-size: .78rem; }
.instrument-note b { color: var(--text); }
.reference-box { margin: 12px 26px 0; border: 1px solid var(--line); border-radius: 7px; background: var(--bg-soft); }
.reference-box summary { padding: 10px 12px; cursor: pointer; color: var(--accent-2); font-size: .84rem; font-weight: 700; }
.reference-box summary span { margin-left: 7px; color: var(--muted); font-size: .72rem; font-weight: 400; }
.reference-links { padding: 0 12px 10px; }
.reference-links p { margin-top: 8px; color: var(--muted); font-size: .7rem; }
.today-card > .complete-btn, .today-card > .timer-display, .today-card > .cancel-link { width: auto; margin-left: 26px; margin-right: 26px; }
.today-card > .complete-btn { width: calc(100% - 52px); margin-bottom: 22px; }
.complete-btn {
  margin-top: 14px;
  width: 100%;
  padding: 13px;
  background: var(--accent);
  color: var(--bg-soft);
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 3px;
  cursor: pointer;
  transition: all .2s;
}
.complete-btn:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(46,110,94,.22);
}
.complete-btn.done { background: var(--bg-soft); color: var(--muted); cursor: default; }
.complete-btn.done:hover { transform: none; box-shadow: none; }
.complete-btn.done.undo { cursor: pointer; border: 1px dashed rgba(36,33,29,.3); }
.complete-btn.done.undo:hover { background: rgba(119,37,31,.08); color: var(--danger); }
.complete-btn.running { background: var(--accent-2); color: var(--bg-soft); }
.complete-btn.running:hover { background: #5d5237; color: var(--bg-soft); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(118,106,72,.25); }
.timer-display { margin-top: 14px; padding: 12px; text-align: center; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 8px; font-size: 1rem; }
.timer-display b { font-size: 1.3rem; color: var(--accent); font-variant-numeric: tabular-nums; }
.cancel-link { display: block; margin-top: 8px; text-align: center; font-size: .8rem; color: var(--muted); text-decoration: underline; }

/* ===== 记录页 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; margin-bottom: 26px; }
.stat-card { text-align: center; margin-bottom: 0; }
.stat-num {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 2px;
}
.stat-label { color: var(--muted); font-size: .85rem; margin-top: 4px; letter-spacing: 1px; }
.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 4px;
  background: var(--seal);
  color: var(--bg-soft);
  font-family: var(--serif);
  font-size: .78rem;
  border-radius: 3px;
  vertical-align: -4px;
  box-shadow: 0 1px 3px rgba(36,33,29,.25);
}

/* ===== 突破动画（古典红金） ===== */
.breakthrough-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle, rgba(158,50,40,.12), var(--paper-deep) 75%);
  opacity: 0;
  pointer-events: none;
  animation: bt-fadein .3s ease-out forwards;
}
.breakthrough-overlay.hide { animation: bt-fadeout .6s ease-in forwards; }
@keyframes bt-fadein { from { opacity: 0; } to { opacity: 1; } }
@keyframes bt-fadeout { from { opacity: 1; } to { opacity: 0; } }

.bt-rays {
  position: absolute;
  width: 80vmax;
  height: 80vmax;
  background: conic-gradient(from 0deg, rgba(176,141,62,0), rgba(176,141,62,.18) 12%, rgba(176,141,62,0) 25%,
    rgba(176,141,62,.18) 37%, rgba(176,141,62,0) 50%, rgba(176,141,62,.18) 62%,
    rgba(176,141,62,0) 75%, rgba(176,141,62,.18) 87%, rgba(176,141,62,0));
  border-radius: 50%;
  animation: bt-spin 12s linear infinite;
}
@keyframes bt-spin { to { transform: rotate(360deg); } }

.bt-core {
  position: relative;
  z-index: 2;
  text-align: center;
  animation: bt-rise .9s ease-out both;
}
.bt-level {
  font-size: 2.9rem;
  font-weight: 900;
  color: var(--seal);
  letter-spacing: 8px;
  text-shadow: 0 1px 0 rgba(255,255,255,.5);
}
.bt-title { font-size: 1.05rem; color: var(--text); letter-spacing: 6px; margin-bottom: 10px; opacity: .9; }
.bt-sub { color: var(--muted); margin-top: 12px; font-size: .92rem; }
.bt-sparks { position: absolute; inset: 0; pointer-events: none; }
.bt-sparks span {
  position: absolute;
  font-size: 18px;
  color: #b08d3e;
  animation: bt-spark linear forwards;
}
@keyframes bt-spark {
  from { transform: translateY(0) scale(1); opacity: 1; }
  to { transform: translateY(-46vh) scale(0.2); opacity: 0; }
}
@keyframes bt-rise {
  from { opacity: 0; transform: translateY(20px) scale(0.94); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.record-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px dashed rgba(36,33,29,.16);
}
.record-item:last-child { border-bottom: none; }
.record-date { font-weight: 600; }
.record-info { color: var(--muted); font-size: .85rem; }
.record-del {
  background: none; border: 1px solid rgba(36,33,29,.22); color: var(--danger);
  border-radius: 6px; padding: 5px 12px; cursor: pointer; font-size: .8rem;
}

/* ===== 排行榜 ===== */
.rank-input-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 6px;
}
.rank-input-row input[type="text"] {
  flex: 1;
  min-width: 170px;
  padding: 12px 14px;
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 16px;
  outline: none;
}
.rank-input-row input[type="text"]:focus { border-color: var(--accent); }
.rank-btn {
  padding: 12px 22px;
  background: var(--accent);
  color: var(--bg-soft);
  border: none;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all .2s;
}
.rank-btn:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(46,110,94,.22); }
.rank-btn:disabled { opacity: .55; cursor: default; transform: none; box-shadow: none; }
.board-row {
  display: grid;
  grid-template-columns: 44px 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 12px 6px;
  border-bottom: 1px dashed rgba(36,33,29,.16);
}
.board-row:last-child { border-bottom: none; }
.board-row.mine { background: rgba(46,110,94,.06); border-radius: 8px; }
.rank-no { font-weight: 900; color: var(--accent-2); text-align: center; font-size: 1.05rem; font-family: var(--serif); }
.rank-no.top1 { color: #9e3228; }
.rank-no.top2 { color: #766a48; }
.rank-no.top3 { color: #b08d3e; }
.board-name { font-weight: 700; font-size: 1rem; letter-spacing: 1px; }
.board-nums { color: var(--muted); font-size: .86rem; white-space: nowrap; }

/* ===== 功法阁 ===== */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.chip {
  padding: 8px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  font-size: .88rem;
  letter-spacing: 1px;
  transition: all .2s;
}
.chip:hover { color: var(--text); border-color: var(--accent); }
.chip.active { background: var(--accent); color: var(--bg-soft); border-color: var(--accent); }

.exercise-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.ex-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; transition: transform .2s, border-color .2s; }
.ex-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.ex-card h3 { font-size: 1rem; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; letter-spacing: 1px; }
.ex-tag {
  font-size: .7rem; background: rgba(46,110,94,.12); color: var(--accent);
  padding: 2px 9px; border-radius: 10px; font-weight: 700; white-space: nowrap;
}
.ex-card p { color: var(--muted); font-size: .86rem; }
.ex-card .ex-tip { margin-top: 10px; color: var(--accent); font-size: .8rem; }
.ex-card .ex-src { margin-top: 10px; padding-top: 8px; border-top: 1px dashed rgba(36,33,29,.16); font-size: .74rem; opacity: .8; }

/* ===== 页脚 ===== */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
  padding: 20px 0;
  text-align: center;
  color: var(--muted);
  font-size: .82rem;
}
.beian-line { margin-top: 7px; }
.beian-line a { color: inherit; text-decoration: none; }
.beian-line a:hover { color: var(--accent); text-decoration: underline; }

.ex-card.topic-focus {
  border-color: rgba(46, 110, 94, .58);
  box-shadow: 0 0 0 3px rgba(46, 110, 94, .12), var(--shadow);
  animation: topic-focus-in .65s ease both;
}

@keyframes topic-focus-in {
  from { transform: translateY(8px); opacity: .7; }
  to { transform: translateY(0); opacity: 1; }
}

.muted { color: var(--muted); }
@media (max-width: 640px) {
  .header-inner { padding: 10px 0; flex-wrap: nowrap; gap: 6px; }
  .logo { font-size: 1.02rem; letter-spacing: 1px; }
  .logo::before { width: 32px; height: 22px; }
  .main-nav { flex: 1 1 auto; justify-content: flex-start; gap: 2px; overflow-x: auto; flex-wrap: nowrap; scrollbar-width: none; }
  .main-nav::-webkit-scrollbar { display: none; }
  .main-nav a { padding: 7px 9px; font-size: .82rem; white-space: nowrap; }
  .hero { margin-bottom: 24px; }
  .hero h1 { font-size: 1.7rem; letter-spacing: 4px; }
  .hero .hero-sub { font-size: .9rem; letter-spacing: 2px; }
  .hero-home { grid-template-columns: 1fr; gap: 18px; padding: 24px 20px; }
  .course-progress { padding: 12px 14px; }
  .today-heading { align-items: flex-end; }
  .today-card-head { padding: 18px 17px 15px; gap: 12px; }
  .today-card-head h2 { font-size: 1.12rem; }
  .duration-seal { padding: 5px 9px; }
  .practice-toolbar { grid-template-columns: 1fr; }
  .practice-toolbar span { text-align: left; }
  .practice-steps { grid-template-columns: 1fr; padding: 5px 17px; }
  .practice-step > p { margin-left: 0; }
  .completion-standard, .extra-practice { grid-template-columns: 1fr; gap: 3px; margin-left: 17px; margin-right: 17px; }
  .instrument-note { align-items: flex-start; flex-direction: column; gap: 2px; margin-left: 17px; margin-right: 17px; }
  .reference-box { margin-left: 17px; margin-right: 17px; }
  .today-card > .complete-btn, .today-card > .timer-display, .today-card > .cancel-link { margin-left: 17px; margin-right: 17px; }
  .today-card > .complete-btn { width: calc(100% - 34px); }
  .settings-summary small { display: none; }
  .settings-grid { grid-template-columns: 1fr; padding: 15px 17px 18px; }
  .exercise-row { grid-template-columns: 1fr auto; }
  .ex-detail { display: none; }
  .ex-name { font-size: 1.04rem; }
  .ex-name small { font-size: .85rem; }
  .card h2 { font-size: 1.18rem; }
  .setting-group label { font-size: .95rem; }
  .setting-group select { font-size: 16px; }
  .plan-summary { font-size: .95rem; }
  .day-title { font-size: 1.03rem; }
  .day-meta { font-size: .9rem; }
  .stat-label { font-size: .92rem; }
  .record-info { font-size: .9rem; }
  .site-footer { font-size: .88rem; padding-bottom: calc(20px + env(safe-area-inset-bottom)); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
}