@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
  --cream: #fdf8f3;
  --warm-white: #fffaf5;
  --latte: #f3e5d8;
  --caramel: #d4a373;
  --hazelnut: #b08968;
  --chocolate: #7f5539;
  --espresso: #4a3b2a;
  --soft-orange: #f4a261;
  --sage: #a3b18a;
  --mist: #6c757d;
  --shadow: rgba(74, 59, 42, 0.12);
  --radius: 18px;
  --radius-sm: 12px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--cream);
  color: var(--espresso);
  line-height: 1.7;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6,
.nav-logo,
.hero-greeting h1,
.law-header,
.card h3,
.page-header h1 {
  font-family: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;
  font-weight: 600;
}

a {
  color: inherit;
  text-decoration: none;
}

/* 封面页 */
.hero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-slides {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}

.hero-slide.active {
  opacity: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(74, 59, 42, 0.55) 0%,
    rgba(74, 59, 42, 0.25) 50%,
    rgba(74, 59, 42, 0.45) 100%
  );
  z-index: 1;
}

.hero-greeting {
  position: relative;
  z-index: 2;
  padding: 12vh 8vw 0;
}

.hero-greeting h1 {
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--warm-white);
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  letter-spacing: 0.04em;
}

.hero-greeting p {
  margin-top: 1rem;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--latte);
  max-width: 520px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-cards {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 0 8vw 8vh;
}

.hero-card {
  background: rgba(255, 250, 245, 0.10);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 24px;
  padding: 34px 24px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18),
              inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--warm-white);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-accent, var(--caramel));
  opacity: 0.85;
  transition: var(--transition);
}

.hero-card:hover {
  transform: translateY(-8px) scale(1.02);
  background: rgba(255, 250, 245, 0.16);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28),
              inset 0 1px 0 rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.32);
}

.hero-card:hover::before {
  opacity: 1;
  height: 5px;
  box-shadow: 0 0 18px var(--card-accent, var(--caramel));
}

.hero-card .icon {
  width: 62px;
  height: 62px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.hero-card .icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--card-accent, var(--warm-white));
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero-card h2 {
  font-size: 1.7rem;
  margin-bottom: 10px;
  color: var(--warm-white);
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.hero-card p {
  font-size: 0.95rem;
  color: rgba(255, 250, 245, 0.76);
}

/* 导航 */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253, 248, 243, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--latte);
  padding: 14px 8vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px 6px 10px;
  border-radius: 50px;
  background: var(--latte);
  color: var(--chocolate);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-back:hover {
  background: var(--caramel);
  color: var(--warm-white);
  transform: translateX(-2px);
}

.nav-logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--chocolate);
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--espresso);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--chocolate);
  border-bottom-color: var(--caramel);
}

/* 风景横幅 */
.page-banner {
  width: 100%;
  height: 240px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.page-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(74, 59, 42, 0.25) 0%,
    rgba(253, 248, 243, 0.95) 100%
  );
}

/* 页面内容 */
.page-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 8vw 80px;
}

.page-header {
  margin-bottom: 40px;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--chocolate);
  margin-bottom: 12px;
}

.page-header p {
  color: var(--mist);
  font-size: 1.05rem;
}

/* =========================================================
   学习页主题色：按板块适配，使按钮 / 链接自然融入、不突兀
   ========================================================= */
body.theme-law      { --accent: #7f5539; --accent-soft: rgba(127, 85, 57, 0.12); }
body.theme-english  { --accent: #d9774f; --accent-soft: rgba(217, 119, 79, 0.12); }
body.theme-elective { --accent: #6a8c5a; --accent-soft: rgba(106, 140, 90, 0.12); }
body.theme-checkin  { --accent: #e28743; --accent-soft: rgba(226, 135, 67, 0.12); }

/* 主题化主按钮：与所在板块主色一致 */
body.theme-law .btn-primary,
body.theme-english .btn-primary,
body.theme-elective .btn-primary,
body.theme-checkin .btn-primary { background: var(--accent); }
body.theme-law .btn-primary:hover,
body.theme-english .btn-primary:hover,
body.theme-elective .btn-primary:hover,
body.theme-checkin .btn-primary:hover { filter: brightness(0.93); transform: translateY(-2px); }

/* 法律页：官方链接按钮随主题 */
body.theme-law .law-links a { background: var(--accent); }
body.theme-law .law-links a:hover { filter: brightness(0.93); opacity: 1; }

/* 二级标题随主题强调，作为板块内自然分隔 */
body.theme-law .page-header h2,
body.theme-english .page-header h2,
body.theme-elective .page-header h2,
body.theme-checkin .page-header h2 {
  color: var(--accent);
  border-left: 4px solid var(--accent);
  padding-left: 14px;
  border-radius: 2px;
}

/* =========================================================
   学习页大气页头：整幅背景图 + 渐变 + 大标题（仿首页）
   ========================================================= */
.page-hero {
  position: relative;
  width: 100%;
  min-height: 46vh;
  min-height: 46svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  padding: 0 8vw 60px;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(40,28,18,0.26) 0%, rgba(40,28,18,0.42) 45%, rgba(40,28,18,0.82) 100%);
}
.page-hero::before {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 4px;
  background: var(--accent, var(--caramel));
  z-index: 3;
}
.page-hero-inner {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: 820px;
}
.page-hero-eyebrow {
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  color: rgba(255, 250, 245, 0.9);
  margin-bottom: 14px;
}
.page-hero-title {
  font-family: "Noto Serif SC", "Source Han Serif SC", "STSong", serif;
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0.04em;
  text-shadow: 0 4px 20px rgba(0,0,0,0.4);
  margin-bottom: 12px;
}
.page-hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255, 250, 245, 0.92);
  max-width: 640px;
  line-height: 1.75;
  text-shadow: 0 2px 10px rgba(0,0,0,0.35);
}

/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: var(--warm-white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 6px 24px var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--latte);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(74, 59, 42, 0.15);
}

.card .card-icon {
  font-size: 2.2rem;
}

.card h3 {
  font-size: 1.3rem;
  color: var(--chocolate);
}

.card p {
  font-size: 0.92rem;
  color: var(--mist);
  flex-grow: 1;
}

.card .card-arrow {
  align-self: flex-start;
  margin-top: 6px;
  background: var(--accent-soft, rgba(212, 163, 115, 0.16));
  color: var(--accent, var(--caramel));
  font-size: 0.85rem;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 999px;
  transition: var(--transition);
}
.card:hover .card-arrow {
  background: var(--accent, var(--caramel));
  color: #fff;
  transform: translateX(4px);
}

/* 法律文本折叠面板 */
.law-section {
  background: var(--warm-white);
  border-radius: var(--radius);
  margin-bottom: 24px;
  box-shadow: 0 6px 24px var(--shadow);
  overflow: hidden;
}

.law-header {
  width: 100%;
  padding: 20px 28px;
  background: none;
  border: none;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--chocolate);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.law-header:hover {
  background: var(--latte);
}

.law-header .toggle-icon {
  transition: transform 0.3s ease;
}

.law-section.open .law-header .toggle-icon {
  transform: rotate(180deg);
}

.law-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.law-section.open .law-body {
  max-height: 2000px;
}

.law-body-inner {
  padding: 0 28px 28px;
}

.law-body-inner h4 {
  color: var(--chocolate);
  margin: 20px 0 10px;
}

.law-body-inner p,
.law-body-inner li {
  color: var(--espresso);
  font-size: 0.95rem;
}

.law-body-inner ul {
  padding-left: 22px;
}

.law-body-inner a {
  color: var(--hazelnut);
  text-decoration: underline;
}

.law-note {
  background: rgba(210, 180, 140, 0.12);
  border-left: 3px solid var(--caramel);
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--espresso);
  margin-bottom: 14px;
}

.law-chapter {
  color: var(--chocolate);
  font-size: 1.02rem;
  margin: 22px 0 8px;
  padding-bottom: 4px;
  border-bottom: 1px dashed rgba(150, 110, 70, 0.3);
}

.law-sub {
  color: var(--hazelnut);
  font-weight: 600;
  margin: 14px 0 6px;
  font-size: 0.95rem;
}

.law-article {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--espresso);
  margin: 8px 0;
  padding-left: 4px;
}

.law-article b {
  color: var(--chocolate);
  font-weight: 700;
  margin-right: 4px;
}

.law-links {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.law-links a {
  background: var(--caramel);
  color: #fff;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  transition: opacity 0.2s;
}

.law-links a:hover {
  opacity: 0.88;
}

/* 上传区域 */
.upload-zone {
  border: 2px dashed var(--caramel);
  border-radius: var(--radius);
  padding: 26px 20px;
  text-align: center;
  background: rgba(212, 163, 115, 0.08);
  transition: var(--transition);
  cursor: pointer;
}

.upload-zone:hover,
.upload-zone.dragover {
  background: rgba(212, 163, 115, 0.18);
  border-color: var(--chocolate);
}

.upload-zone .upload-icon {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.upload-zone p {
  color: var(--mist);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.upload-zone input {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 50px;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--chocolate);
  color: var(--warm-white);
}

.btn-primary:hover {
  background: var(--espresso);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--latte);
  color: var(--chocolate);
}

.btn-secondary:hover {
  background: var(--caramel);
  color: var(--warm-white);
}

/* 文件列表 */
.file-list {
  margin-top: 32px;
}

.file-list h3 {
  font-size: 1.1rem;
  color: var(--chocolate);
  margin-bottom: 16px;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  background: var(--warm-white);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  box-shadow: 0 2px 8px var(--shadow);
}

.file-item a {
  color: var(--chocolate);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-item .file-meta {
  font-size: 0.8rem;
  color: var(--mist);
  white-space: nowrap;
}

.file-item button {
  background: transparent;
  border: none;
  color: var(--soft-orange);
  cursor: pointer;
  font-size: 0.85rem;
}

.empty-tip {
  color: var(--mist);
  font-size: 0.95rem;
  padding: 12px 0;
}

/* 北大法宝检索面板 */
.pkulaw-panel {
  background: var(--warm-white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 4px 16px var(--shadow);
  border-top: 4px solid var(--sage);
}

.pkulaw-search {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.pkulaw-select,
.pkulaw-input {
  padding: 12px 14px;
  border: 1px solid var(--caramel);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  background: var(--cream);
  color: var(--espresso);
}

.pkulaw-select {
  flex: 0 0 140px;
}

.pkulaw-input {
  flex: 1 1 240px;
}

.pkulaw-input:focus,
.pkulaw-select:focus {
  outline: none;
  border-color: var(--chocolate);
  box-shadow: 0 0 0 3px rgba(127, 85, 57, 0.12);
}

.pkulaw-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.pkulaw-chip {
  padding: 8px 16px;
  background: var(--latte);
  color: var(--chocolate);
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.18s ease;
}

.pkulaw-chip:hover {
  background: var(--caramel);
  color: var(--warm-white);
  transform: translateY(-1px);
}

.pkulaw-result {
  border-top: 1px dashed var(--caramel);
  padding-top: 16px;
  min-height: 60px;
}

.pkulaw-offline {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.pkulaw-offline p {
  margin: 0;
  color: var(--espresso);
}

.pkulaw-offline .pkulaw-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.pkulaw-offline a {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.pkulaw-offline .link-primary {
  background: var(--sage);
  color: #fff;
}

.pkulaw-offline .link-secondary {
  background: var(--latte);
  color: var(--chocolate);
}

.pkulaw-result-item {
  padding: 14px 16px;
  background: var(--cream);
  border-left: 4px solid var(--sage);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.pkulaw-result-item h4 {
  margin: 0 0 6px;
  color: var(--chocolate);
  font-size: 1.02rem;
}

.pkulaw-result-item p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--espresso);
  line-height: 1.6;
}

.pkulaw-result-item a {
  color: var(--soft-orange);
  font-size: 0.88rem;
  display: inline-block;
  margin-top: 4px;
}

.pkulaw-result-item .assistant-badge { margin-bottom: 6px; }

.pkulaw-meta {
  font-size: 0.78rem !important;
  color: var(--muted, #8a7a6a) !important;
  margin-top: 6px !important;
}

.pkulaw-tl {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 1px 9px;
  border-radius: 999px;
  background: var(--sage-soft, #e8f0e4);
  color: var(--sage, #6f8f5f);
  margin-left: 8px;
}

.pkulaw-seed-group { margin-bottom: 22px; }

.pkulaw-seed-cat {
  font-family: "Noto Serif SC", serif;
  font-size: 1.12rem;
  color: var(--chocolate);
  margin: 0 0 12px;
  padding-left: 10px;
  border-left: 3px solid var(--accent);
}

/* 法律界面：检索专家 + 学习助手 区块 */
.tool-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 8px 8vw 56px;
}

.tool-head { margin-bottom: 20px; }

.tool-title {
  font-family: "Noto Serif SC", "Source Han Serif SC", serif;
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--chocolate);
  margin: 0 0 8px;
  letter-spacing: 0.04em;
}

.tool-sub {
  margin: 0;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.6;
}

/* 法律学习助手 */
.law-assistant {
  background: var(--warm-white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 4px 16px var(--shadow);
  border-top: 4px solid var(--accent);
}

.assistant-controls { margin-bottom: 18px; }

.assistant-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--caramel);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  background: var(--cream);
  color: var(--espresso);
  box-sizing: border-box;
}
.assistant-input:focus {
  outline: none;
  border-color: var(--chocolate);
  box-shadow: 0 0 0 3px rgba(127, 85, 57, 0.12);
}

.assistant-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.filter-chip {
  padding: 8px 18px;
  background: var(--latte);
  color: var(--chocolate);
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.18s ease;
  font-family: inherit;
}
.filter-chip:hover { background: var(--caramel); color: var(--warm-white); transform: translateY(-1px); }
.filter-chip.active { background: var(--accent); color: #fff; }

.assistant-result { border-top: 1px dashed var(--caramel); padding-top: 16px; min-height: 40px; }

.assistant-card {
  background: var(--cream);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-bottom: 12px;
}
.assistant-card h4 {
  margin: 0 0 8px;
  color: var(--chocolate);
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.assistant-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  letter-spacing: 0.05em;
}
.assistant-card p { margin: 0; font-size: 0.94rem; color: var(--espresso); line-height: 1.7; }

.assistant-plans { margin-top: 24px; }
.plans-title {
  font-family: "Noto Serif SC", serif;
  font-size: 1.15rem;
  color: var(--chocolate);
  margin: 0 0 14px;
}
.plan-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.plan-card {
  background: var(--cream);
  border: 1px solid var(--latte);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}
.plan-card h4 { margin: 0 0 8px; color: var(--chocolate); font-size: 1rem; }
.plan-card p { margin: 0; font-size: 0.88rem; color: var(--espresso); line-height: 1.6; }

/* 每日打卡 */
.checkin-form {
  background: var(--warm-white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 6px 24px var(--shadow);
  margin-bottom: 32px;
}

.checkin-status {
  margin: 12px 0 0;
  font-size: 0.92rem;
  min-height: 1.2em;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--chocolate);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--latte);
  border-radius: var(--radius-sm);
  background: var(--cream);
  color: var(--espresso);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--caramel);
  box-shadow: 0 0 0 3px rgba(212, 163, 115, 0.2);
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.checkin-history {
  margin-top: 32px;
}

.checkin-item {
  background: var(--warm-white);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 14px;
  box-shadow: 0 4px 16px var(--shadow);
  border-left: 4px solid var(--caramel);
}

.checkin-item.completed {
  border-left-color: var(--sage);
}

.checkin-item.partial {
  border-left-color: var(--soft-orange);
}

.checkin-date {
  font-size: 0.85rem;
  color: var(--mist);
  margin-bottom: 6px;
}

.checkin-plan {
  font-size: 1.05rem;
  color: var(--chocolate);
  margin-bottom: 10px;
  font-weight: 600;
}

.checkin-completion {
  font-size: 0.95rem;
  color: var(--espresso);
  margin-bottom: 6px;
}

.checkin-note {
  font-size: 0.9rem;
  color: var(--mist);
  font-style: italic;
}

.checkin-item button {
  margin-top: 12px;
  background: transparent;
  border: none;
  color: var(--soft-orange);
  cursor: pointer;
  font-size: 0.85rem;
}

/* 响应式 */
@media (max-width: 768px) {
  .hero {
    justify-content: flex-start;
    gap: 6vh;
  }

  .hero-cards {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 0 7vw 7vh;
  }

  .hero-greeting {
    padding-top: 10vh;
  }

  .nav-links {
    gap: 16px;
  }

  .nav-logo {
    font-size: 1rem;
  }

  .nav-back {
    padding: 5px 10px 5px 8px;
    font-size: 0.82rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .page-hero {
    min-height: 40svh;
    padding: 0 6vw 44px;
  }
  .page-hero-title {
    letter-spacing: 0.02em;
  }
}

/* =========================================================
   新版首页：全屏滚动（ tablet / desktop / mobile 兼容 ）
   ========================================================= */

html {
  scroll-behavior: smooth;
}

.home-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 4vw;
  background: transparent;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}

.home-nav.scrolled {
  background: rgba(74, 59, 42, 0.92);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.home-nav .nav-logo {
  color: #fff;
  font-size: 1.15rem;
  font-weight: 700;
  text-shadow: 0 1px 4px rgba(0,0,0,0.35);
}

.home-nav-links {
  display: flex;
  gap: 24px;
}

.home-nav-links a {
  color: rgba(255, 255, 255, 0.95);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  text-shadow: 0 1px 3px rgba(0,0,0,0.35);
}

.home-nav-links a:hover {
  border-bottom-color: var(--caramel);
  color: #fff;
}

.hero-section {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100dvh; /* 适配移动端动态视口 */
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}

.hero-section .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.25) 0%, rgba(0,0,0,0.35) 60%, rgba(0,0,0,0.55) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0,0,0,0.45);
}

.hero-content.bottom-left {
  position: absolute;
  bottom: 12vh;
  left: 6vw;
  max-width: 80vw;
}

.hero-content.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  width: min(86%, 820px);
  padding: 0 4vw;
}

.hero-slogan {
  font-family: "Noto Serif SC", "Source Han Serif SC", "STSong", serif;
  font-size: clamp(2.2rem, 7vw, 5.5rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.15;
  margin-bottom: 14px;
}

.hero-sub {
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  opacity: 0.92;
  font-weight: 400;
  letter-spacing: 0.04em;
}

.hero-english {
  font-family: "Noto Serif SC", Georgia, serif;
  font-style: italic;
  font-size: clamp(0.9rem, 2vw, 1.25rem);
  letter-spacing: 0.05em;
  opacity: 0.92;
  margin-bottom: 14px;
}

.checkin-slogan {
  margin-bottom: 32px;
  white-space: nowrap;
  font-size: clamp(1.7rem, 6.5vw, 4.2rem);
  letter-spacing: 0.02em;
}

.section-title {
  font-family: "Noto Serif SC", "Source Han Serif SC", serif;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.section-desc {
  font-size: clamp(0.95rem, 1.8vw, 1.25rem);
  opacity: 0.92;
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}

.section-body {
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  line-height: 1.85;
  opacity: 0.94;
  max-width: 700px;
  margin: 0 auto;
}

.school-points {
  list-style: none;
  padding: 0;
  margin: 8px auto 0;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: center;
}

.school-points li {
  position: relative;
  font-family: "Noto Serif SC", "Source Han Serif SC", serif;
  font-size: clamp(1.05rem, 2.2vw, 1.4rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
  opacity: 0.97;
}

.school-points li::before {
  content: "";
}

.hero-top-actions {
  position: absolute;
  top: 8vh;
  right: 6vw;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-top-btn {
  position: relative;
  z-index: 3;
  background: rgba(255, 255, 255, 0.92);
  color: var(--espresso);
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  transition: var(--transition);
  backdrop-filter: blur(6px);
  white-space: nowrap;
}

.hero-top-btn:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.hero-cta-btn {
  display: inline-block;
  background: var(--caramel);
  color: #fff;
  padding: 16px 36px;
  border-radius: 999px;
  font-size: 1.05rem;
  font-weight: 600;
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
  transition: var(--transition);
}

.hero-cta-btn:hover {
  background: var(--soft-orange);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}

.scroll-hint {
  position: absolute;
  bottom: 4vh;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: rgba(255,255,255,0.85);
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  animation: bounce 2s infinite;
  text-shadow: 0 1px 4px rgba(0,0,0,0.4);
}

.scroll-arrow {
  font-size: 1.4rem;
  line-height: 1;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

.home-footer {
  position: absolute;
  bottom: 24px;
  left: 0;
  right: 0;
  z-index: 3;
  text-align: center;
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
  text-shadow: 0 1px 4px rgba(0,0,0,0.4);
}

/* 普通内容页页脚：正常文档流，安静落在页面底部 */
.site-footer {
  text-align: center;
  padding: 30px 16px 40px;
  font-size: 0.85rem;
  color: var(--mist);
  line-height: 1.7;
}

/* 平板适配 */
@media (max-width: 1024px) {
  .hero-content.bottom-left {
    bottom: 13vh;
    left: 5vw;
  }

  .hero-top-actions {
    top: 10vh;
    right: 5vw;
  }

  .hero-top-btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .hero-content.center {
    width: min(90%, 720px);
  }
}

/* 手机适配 */
@media (max-width: 768px) {
  .home-nav {
    padding: 12px 4vw;
  }

  .home-nav .nav-logo {
    font-size: 1rem;
  }

  .home-nav-links {
    gap: 14px;
  }

  .home-nav-links a {
    font-size: 0.82rem;
    padding: 4px 1px;
  }

  .hero-section {
    min-height: 100svh; /* 适配手机短视口 */
  }

  .hero-content.bottom-left {
    bottom: 16vh;
    left: 5vw;
    max-width: 90vw;
  }

  .hero-slogan {
    letter-spacing: 0.04em;
  }

  .hero-sub {
    font-size: 0.95rem;
  }

  .hero-top-actions {
    top: 12vh;
    right: 4vw;
    gap: 8px;
  }

  .hero-top-btn {
    padding: 9px 16px;
    font-size: 0.82rem;
    border-radius: 999px;
  }

  .section-title {
    margin-bottom: 8px;
  }

  .section-desc {
    margin-bottom: 18px;
  }

  .section-body {
    font-size: 0.95rem;
    line-height: 1.75;
  }

  .hero-cta-btn {
    padding: 14px 28px;
    font-size: 0.95rem;
  }

  .scroll-hint {
    bottom: 3vh;
    font-size: 0.78rem;
  }
}

/* 小屏手机 */
@media (max-width: 380px) {
  .home-nav-links {
    gap: 10px;
  }

  .home-nav-links a {
    font-size: 0.75rem;
  }

  .hero-content.bottom-left {
    bottom: 18vh;
  }

  .hero-slogan {
    font-size: 2rem;
  }

  .hero-english {
    font-size: 0.82rem;
  }

  .checkin-slogan {
    margin-bottom: 24px;
  }

  .page-hero {
    min-height: 38svh;
    padding: 0 5vw 36px;
  }
  .page-hero-eyebrow {
    letter-spacing: 0.18em;
    font-size: 0.8rem;
  }
}

/* ============================================================
   飞镖日志 Darts Log
   ============================================================ */

/* 飞镖主题色：深紫/炭黑背景 + 金色强调 */
.theme-darts {
  --accent: #c9a227;
  --accent-soft: rgba(201, 162, 39, 0.12);
  --accent-dark: #8a6d1a;
  --darts-purple: #2a1f3d;
  --darts-charcoal: #1a1520;
}

/* 首页第四屏：飞镖日志 */
.hero-darts .hero-overlay.darts-overlay {
  background: linear-gradient(
    180deg,
    rgba(42, 31, 61, 0.55) 0%,
    rgba(26, 21, 32, 0.7) 60%,
    rgba(26, 21, 32, 0.85) 100%
  );
}

.hero-darts .hero-eyebrow {
  display: inline-block;
  background: rgba(201, 162, 39, 0.2);
  color: #f5e6a8;
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  border: 1px solid rgba(245, 230, 168, 0.3);
  backdrop-filter: blur(4px);
}

.hero-darts .hero-slogan {
  font-size: clamp(2.4rem, 8vw, 6rem);
  color: #fff;
}

.hero-darts .hero-sub {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
}

.hero-darts .darts-cta {
  background: linear-gradient(135deg, #c9a227 0%, #a8861b 100%);
  box-shadow: 0 8px 28px rgba(201, 162, 39, 0.35);
}

.hero-darts .darts-cta:hover {
  background: linear-gradient(135deg, #dbb53b 0%, #c9a227 100%);
  box-shadow: 0 10px 34px rgba(201, 162, 39, 0.45);
}

/* 飞镖页通用页头 */
.darts-hero .page-hero-bg {
  background-position: center top;
}

.darts-hero-overlay {
  background: linear-gradient(
    180deg,
    rgba(42, 31, 61, 0.62) 0%,
    rgba(26, 21, 32, 0.78) 70%,
    rgba(26, 21, 32, 0.92) 100%
  ) !important;
}

/* 入口页四个模式卡片 */
.darts-grid {
  gap: 24px;
}

.darts-card {
  background: linear-gradient(180deg, rgba(255, 250, 245, 0.08) 0%, rgba(255, 250, 245, 0.03) 100%);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 250, 245, 0.18);
  color: var(--warm-white);
  position: relative;
  overflow: hidden;
}

.darts-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #c9a227, #f5e6a8, #c9a227);
  opacity: 0.85;
}

.darts-card h2 {
  color: #f5e6a8;
}

.darts-card p {
  color: rgba(255, 250, 245, 0.78);
}

.darts-card .card-arrow {
  color: #c9a227;
  border: 1px solid rgba(201, 162, 39, 0.4);
  background: rgba(201, 162, 39, 0.1);
}

.darts-card:hover {
  transform: translateY(-8px);
  border-color: rgba(245, 230, 168, 0.35);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}

.darts-card:hover .card-arrow {
  background: #c9a227;
  color: #1a1520;
}

.darts-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  background: rgba(201, 162, 39, 0.12);
  border: 1px solid rgba(245, 230, 168, 0.25);
  margin-bottom: 18px;
}

/* 训练小贴士 */
.darts-tips {
  background: rgba(201, 162, 39, 0.08);
  border: 1px solid rgba(201, 162, 39, 0.22);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-top: 32px;
  color: var(--espresso);
}

.darts-tips h3 {
  margin: 0 0 16px;
  color: #8a6d1a;
  font-size: 1.2rem;
}

.darts-tips ul {
  margin: 0;
  padding-left: 20px;
  line-height: 1.9;
}

.darts-tips li {
  margin-bottom: 8px;
}

/* 模式计分页面 */
.darts-mode-section {
  padding: 40px 5vw 60px;
  max-width: 860px;
  margin: 0 auto;
}

.darts-form {
  background: var(--warm-white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 6px 24px var(--shadow);
  margin-bottom: 32px;
}

.darts-form .form-hint {
  margin: 8px 0 0;
  font-size: 0.88rem;
  color: var(--mist);
}

.darts-submit-btn,
.darts-ai-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.darts-submit-btn {
  background: linear-gradient(135deg, #c9a227 0%, #a8861b 100%);
  color: #fff;
  box-shadow: 0 6px 20px rgba(201, 162, 39, 0.3);
}

.darts-submit-btn:hover {
  background: linear-gradient(135deg, #dbb53b 0%, #c9a227 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 162, 39, 0.38);
}

.darts-ai-wrap {
  margin-bottom: 36px;
}

.darts-ai-btn {
  background: linear-gradient(135deg, #7f5539 0%, #5e3d29 100%);
  color: #fff;
  margin-bottom: 18px;
  box-shadow: 0 6px 20px rgba(127, 85, 57, 0.28);
}

.darts-ai-btn:hover {
  background: linear-gradient(135deg, #9c6b47 0%, #7f5539 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(127, 85, 57, 0.35);
}

.darts-ai {
  min-height: 80px;
}

.darts-ai-card {
  background: linear-gradient(135deg, rgba(42, 31, 61, 0.06) 0%, rgba(201, 162, 39, 0.08) 100%);
  border-left: 5px solid #c9a227;
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: 0 4px 18px var(--shadow);
}

.darts-ai-card .ai-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.darts-ai-card .ai-badge {
  background: linear-gradient(135deg, #7f5539 0%, #5e3d29 100%);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
}

.darts-ai-card .ai-level {
  color: #8a6d1a;
  font-weight: 700;
  font-size: 0.95rem;
}

.darts-ai-card .ai-opinion {
  font-size: 1.05rem;
  color: var(--chocolate);
  line-height: 1.7;
  margin: 0 0 18px;
}

.darts-ai-card h4 {
  margin: 0 0 12px;
  color: #7f5539;
  font-size: 1.05rem;
}

.darts-ai-card .ai-tips {
  margin: 0;
  padding-left: 20px;
  color: var(--espresso);
  line-height: 1.9;
}

.darts-ai-card .ai-tips li {
  margin-bottom: 8px;
}

/* 统计面板 */
.darts-result {
  margin-bottom: 32px;
}

.darts-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.darts-stats-grid.three {
  grid-template-columns: repeat(3, 1fr);
}

.stat-box {
  background: var(--cream);
  border-radius: var(--radius-sm);
  padding: 18px 14px;
  text-align: center;
  border-top: 3px solid var(--accent);
}

.stat-box span {
  display: block;
  font-size: 0.85rem;
  color: var(--mist);
  margin-bottom: 6px;
}

.stat-box strong {
  display: block;
  font-size: 1.6rem;
  color: var(--chocolate);
}

.stat-box strong.finish {
  color: var(--sage);
}

/* 历史记录 */
.darts-history h3 {
  margin: 0 0 16px;
  color: var(--chocolate);
  font-size: 1.2rem;
}

.darts-history-item {
  background: var(--warm-white);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-bottom: 10px;
  font-size: 0.95rem;
  color: var(--espresso);
  box-shadow: 0 2px 10px var(--shadow);
  border-left: 3px solid var(--accent);
}

/* 米老鼠输入 */
.cricket-inputs {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
}

.cricket-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.cricket-row span {
  font-weight: 700;
  color: var(--chocolate);
  font-size: 0.9rem;
}

.cricket-row input {
  width: 60px;
  text-align: center;
  padding: 10px 6px;
  font-size: 1.1rem;
  border: 1px solid var(--latte);
  border-radius: var(--radius-sm);
  background: var(--cream);
}

.cricket-row input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.2);
}

.cricket-marks {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.cricket-mark {
  text-align: center;
  padding: 12px 6px;
  background: var(--cream);
  border-radius: var(--radius-sm);
}

.cricket-mark.closed {
  background: rgba(131, 165, 129, 0.18);
  border: 1px solid rgba(131, 165, 129, 0.45);
}

.cricket-mark .cricket-num {
  display: block;
  font-weight: 700;
  color: var(--chocolate);
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.cricket-mark .cricket-bar {
  display: block;
  letter-spacing: 2px;
  color: var(--accent);
  font-size: 0.9rem;
}

/* 飞镖页响应式 */
@media (max-width: 768px) {
  .darts-grid {
    grid-template-columns: 1fr;
  }

  .darts-mode-section {
    padding: 28px 4vw 48px;
  }

  .darts-form {
    padding: 22px;
  }

  .darts-stats-grid,
  .darts-stats-grid.three {
    grid-template-columns: repeat(2, 1fr);
  }

  .cricket-inputs,
  .cricket-marks {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 480px) {
  .darts-stats-grid,
  .darts-stats-grid.three {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-box strong {
    font-size: 1.35rem;
  }

  .cricket-inputs,
  .cricket-marks {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-darts .hero-slogan {
    font-size: 2.4rem;
  }
}

@media (max-width: 380px) {
  .home-nav-links {
    gap: 10px;
  }

  .home-nav-links a {
    font-size: 0.72rem;
  }

  .cricket-inputs,
  .cricket-marks {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== 导航图标按钮（主题 / 搜索）===== */
.nav-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-left: 6px;
  border: none;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--chocolate);
  transition: var(--transition);
}
.nav-icon-btn:hover { background: var(--latte); }

/* ===== 汉堡菜单：点击左上角「🐻 DiJmad」触发，下拉精准锚定在图标下方，面板半透明 ===== */

/* 小熊图标 + DiJmad 作为菜单触发器：可点击、带向下箭头提示 */
.nav-logo {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}
.nav-logo::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid currentColor;
  margin-top: 2px;
  opacity: 0.7;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-logo[aria-expanded="true"]::after {
  transform: rotate(180deg);
  opacity: 1;
}
.nav-logo:focus-visible {
  outline: 2px solid var(--caramel);
  outline-offset: 4px;
  border-radius: 8px;
}

/* 下拉菜单：左对齐锚定在 logo 图标正下方，半透明毛玻璃 */
.home-nav .home-nav-links,
.nav-bar .nav-links {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: auto;
  width: min(240px, calc(100vw - 24px));
  flex-direction: column;
  gap: 2px;
  background: rgba(253, 248, 243, 0.82);
  backdrop-filter: blur(12px) saturate(130%);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  border: 1px solid var(--latte);
  border-radius: var(--radius);
  box-shadow: 0 18px 44px var(--shadow);
  padding: 8px;
  z-index: 90;
  opacity: 0;
  transform: translateY(-10px);
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
}
/* 精准对齐到小熊图标（等于 nav 的左内边距） */
.nav-bar .nav-links { left: 8vw; }
.home-nav .home-nav-links { left: 4vw; }

.home-nav.nav-open .home-nav-links,
.nav-bar.nav-open .nav-links {
  opacity: 1;
  transform: none;
  visibility: visible;
  pointer-events: auto;
}
.home-nav-links a,
.nav-links a {
  padding: 12px 16px;
  border-radius: 12px;
  border-bottom: none;
  font-weight: 500;
  color: var(--espresso);
  transition: background 0.2s ease, color 0.2s ease;
}
.home-nav-links a:hover,
.nav-links a:hover,
.nav-links a.active {
  background: var(--latte);
  color: var(--chocolate);
}

/* ===== 全站搜索弹层 ===== */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 8vh 16px 16px;
  background: rgba(40, 30, 20, 0.5);
  backdrop-filter: blur(4px);
}
.search-overlay.open { display: flex; }
.search-modal {
  width: 100%;
  max-width: 560px;
  background: var(--warm-white);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  animation: searchPop 0.2s ease;
}
@keyframes searchPop {
  from { transform: translateY(-12px); opacity: 0; }
  to { transform: none; opacity: 1; }
}
.search-modal-head {
  display: flex;
  gap: 8px;
  padding: 14px;
  border-bottom: 1px solid var(--latte);
}
.search-input {
  flex: 1;
  border: 1px solid var(--latte);
  border-radius: 999px;
  padding: 12px 18px;
  font-size: 1rem;
  background: var(--cream);
  color: var(--espresso);
  outline: none;
}
.search-input:focus { border-color: var(--caramel); }
.search-close {
  border: none;
  background: var(--latte);
  color: var(--chocolate);
  width: 44px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
}
.search-close:hover { background: var(--caramel); color: #fff; }
.search-results { max-height: 60vh; overflow-y: auto; padding: 14px; }
.search-group { margin-bottom: 14px; }
.search-group-title {
  font-size: 0.85rem;
  color: var(--hazelnut);
  margin-bottom: 8px;
  font-family: "Noto Sans SC", sans-serif;
  letter-spacing: 0.05em;
}
.search-group-items { display: flex; flex-wrap: wrap; gap: 8px; }
.search-item {
  display: inline-block;
  padding: 8px 14px;
  background: var(--latte);
  color: var(--chocolate);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}
.search-item:hover { background: var(--caramel); color: #fff; transform: translateY(-1px); }

/* ===== 打卡可视化 ===== */
.checkin-streak-wrap { margin: 28px 0; }
.checkin-streak {
  margin-top: 12px;
  background: var(--warm-white);
  border: 1px solid var(--latte);
  border-radius: var(--radius);
  padding: 20px;
}
.streak-stats { display: flex; gap: 16px; margin-bottom: 18px; }
.streak-stat {
  flex: 1;
  text-align: center;
  background: linear-gradient(135deg, var(--caramel), var(--hazelnut));
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 16px 8px;
}
.streak-stat strong {
  display: block;
  font-size: 2rem;
  font-family: "Noto Serif SC", serif;
  line-height: 1.1;
}
.streak-stat span { font-size: 0.85rem; opacity: 0.92; }
.streak-heatmap {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 6px;
}
.streak-axis {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-top: 22px;
}
.streak-axis span {
  width: 16px;
  height: 17px;
  line-height: 17px;
  text-align: center;
  font-size: 0.66rem;
  color: var(--mist);
}
.streak-cols { display: flex; flex-direction: column; }
.streak-months {
  display: flex;
  gap: 5px;
  height: 16px;
  margin-bottom: 6px;
}
.streak-month {
  width: 17px;
  font-size: 0.64rem;
  color: var(--mist);
  white-space: nowrap;
  overflow: visible;
}
.streak-weeks { display: flex; gap: 5px; }
.streak-week { display: flex; flex-direction: column; gap: 5px; }
.streak-cell {
  width: 17px;
  height: 17px;
  border-radius: 4px;
  background: var(--latte);
  transition: transform 0.12s ease;
}
.streak-cell:hover { transform: scale(1.18); }
.streak-cell.on {
  background: linear-gradient(135deg, var(--sage), #7d9470);
}
.streak-cell.today { outline: 2px solid var(--soft-orange); outline-offset: 1px; }

/* ===== 深色模式 ===== */
[data-theme="dark"] {
  --cream: #1a1410;
  --warm-white: #241b14;
  --latte: #3a2c20;
  --caramel: #e0b384;
  --hazelnut: #c79b76;
  --chocolate: #ecd9c8;
  --espresso: #f3e8db;
  --soft-orange: #f4a261;
  --sage: #9bb083;
  --mist: #9aa3ab;
  --shadow: rgba(0, 0, 0, 0.5);
}
[data-theme="dark"] body { background: var(--cream); color: var(--espresso); }
[data-theme="dark"] .nav-bar { background: rgba(26, 20, 16, 0.96); border-bottom-color: var(--latte); }
[data-theme="dark"] .nav-back { background: var(--latte); color: var(--chocolate); }
[data-theme="dark"] .nav-logo { color: var(--chocolate); }
[data-theme="dark"] .nav-bar .nav-links,
[data-theme="dark"] .home-nav .home-nav-links {
  background: rgba(38, 30, 22, 0.82);
  border-color: var(--latte);
}
[data-theme="dark"] .nav-links a,
[data-theme="dark"] .home-nav-links a { color: var(--espresso); }
[data-theme="dark"] .home-nav.scrolled { background: rgba(20, 15, 11, 0.95); }
[data-theme="dark"] input,
[data-theme="dark"] textarea,
[data-theme="dark"] select {
  background: #2c211a;
  color: var(--espresso);
  border-color: var(--latte);
}
[data-theme="dark"] .btn,
[data-theme="dark"] .btn-primary { background: var(--caramel); color: #2a1c10; }
[data-theme="dark"] .btn:hover,
[data-theme="dark"] .btn-primary:hover { background: var(--hazelnut); }
[data-theme="dark"] .upload-zone,
[data-theme="dark"] .checkin-form,
[data-theme="dark"] .darts-form,
[data-theme="dark"] .card,
[data-theme="dark"] .checkin-item,
[data-theme="dark"] .file-item,
[data-theme="dark"] .stat-box,
[data-theme="dark"] .darts-ai-card,
[data-theme="dark"] .pkulaw-result-item,
[data-theme="dark"] .law-section,
[data-theme="dark"] .law-assistant,
[data-theme="dark"] .assistant-card,
[data-theme="dark"] .plan-card,
[data-theme="dark"] .search-modal { background: var(--warm-white); color: var(--espresso); }
[data-theme="dark"] .search-overlay { background: rgba(0, 0, 0, 0.6); }
[data-theme="dark"] .search-input { background: #2c211a; }
[data-theme="dark"] .checkin-streak { background: var(--warm-white); }
[data-theme="dark"] .streak-cell { background: var(--latte); }
[data-theme="dark"] .streak-cell.on { background: linear-gradient(135deg, var(--sage), #7d9470); }