/* ===================================================================
   浙江海洋大学 (ZJOU) 学习资料共享站 - 纯粹简约海洋风设计系统
   Clean, Modern Ocean-Blue Theme, 2-Category Focus, No Clutter
   =================================================================== */

:root {
  /* 基础海洋色彩系统 (Light Mode) */
  --bg-body: #f4f8fc;
  --bg-surface: #ffffff;
  --bg-surface-hover: #ffffff;
  --bg-subtle: #ebf3fa;
  --border-color: #dce7f3;
  --border-focus: #0284c7;

  --text-main: #0c4a6e;
  --text-title: #075985;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-white: #ffffff;

  /* 海洋主题强调色 */
  --ocean-primary: #0284c7;
  --ocean-dark: #0369a1;
  --ocean-deep: #075985;
  --ocean-light: #38bdf8;
  --ocean-gradient: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  --ocean-subtle: rgba(2, 132, 199, 0.08);

  /* 分类色彩 */
  --exam-color: #0284c7;
  --exam-bg: #e0f2fe;
  --course-color: #0d9488;
  --course-bg: #ccfbf1;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(12, 74, 110, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(12, 74, 110, 0.08);
  --shadow-lg: 0 20px 35px -10px rgba(12, 74, 110, 0.12);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 深色模式 (Dark Mode) */
[data-theme="dark"] {
  --bg-body: #09121d;
  --bg-surface: #0f1c2d;
  --bg-surface-hover: #142439;
  --bg-subtle: #162436;
  --border-color: #1e334d;
  --border-focus: #38bdf8;

  --text-main: #f0f9ff;
  --text-title: #e0f2fe;
  --text-body: #cbd5e1;
  --text-muted: #7dd3fc;

  --ocean-subtle: rgba(56, 189, 248, 0.12);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 35px rgba(0, 0, 0, 0.6);
}

/* 通用基础样式 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-body);
  color: var(--text-body);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input {
  font-family: inherit;
  outline: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ================= 极简导航栏 ================= */
.navbar {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 68px;
  position: relative;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  justify-content: center;
}

.brand-icon {
  font-size: 1.6rem;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: 0.5px;
}

.nav-actions {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
}

.upload-nav-tip {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
  text-decoration: none;
  padding: 4px 6px;
}

.upload-nav-tip:hover {
  color: var(--ocean-primary);
}

.github-link-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-title);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.github-link-btn:hover {
  background: var(--ocean-primary);
  color: #ffffff;
  border-color: var(--ocean-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
}

/* ================= 首页 Hero 区域 (含用户上传海报) ================= */
.hero-section {
  padding: 36px 0 28px 0;
}

.hero-banner-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: grid;
  grid-template-columns: 390px 1fr;
  align-items: center;
  gap: 28px;
  padding: 20px;
  max-width: 960px;
  margin: 0 auto;
}

.hero-poster-container {
  width: 100%;
  height: 480px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  position: relative;
  background: var(--ocean-deep);
}

.hero-poster-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.hero-poster-container:hover .hero-poster-img {
  transform: scale(1.02);
}

.hero-info-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: var(--ocean-subtle);
  color: var(--ocean-primary);
  border-radius: 99px;
  font-size: 0.84rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.hero-main-title {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--text-title);
  line-height: 1.25;
  margin-bottom: 12px;
}

.hero-motto {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ocean-primary);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--text-body);
  max-width: 440px;
  margin: 0 auto;
  line-height: 1.6;
}

/* 核心快速搜索框 - 宽度适配无右侧多余留白 */
.search-box-wrap {
  position: relative;
  width: 100%;
  margin-bottom: 4px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-body);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--ocean-primary);
  background: var(--bg-surface);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  font-size: 1rem;
  color: var(--text-main);
  padding: 4px 8px;
}

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

.search-clear-btn {
  color: var(--text-muted);
  font-size: 1.1rem;
  padding: 4px;
  display: none;
}

.search-clear-btn:hover {
  color: var(--text-main);
}

.search-submit-btn {
  background: var(--ocean-gradient);
  color: #fff;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}

.search-submit-btn:hover {
  opacity: 0.92;
}

/* ================= 三大核心分类大按钮切换栏 ================= */
.main-categories-section {
  max-width: 1100px;
  margin: 28px auto 60px auto;
}

.big-category-tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.big-cat-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: left;
  cursor: pointer;
  position: relative;
}

/* 鼠标悬停在矩形范围内时，四周光亮；离开时不光亮 */
.big-cat-btn:hover {
  border-color: var(--ocean-primary);
  box-shadow: 0 0 22px rgba(2, 132, 199, 0.35), 0 0 0 1px var(--ocean-primary), var(--shadow-md);
  transform: translateY(-2px);
}

.big-cat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  background: var(--bg-subtle);
  color: var(--ocean-primary);
  transition: var(--transition);
}

.big-cat-btn:hover .big-cat-icon {
  background: var(--ocean-primary);
  color: #fff;
}

.big-cat-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 2px;
}

.big-cat-subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.big-cat-count {
  margin-left: auto;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 4px 10px;
  background: var(--bg-subtle);
  color: var(--text-main);
  border-radius: 99px;
}

/* ================= 资料展示列表 ================= */
.resources-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  font-size: 0.95rem;
  color: var(--text-body);
}

.resources-count-text b {
  color: var(--ocean-primary);
  font-size: 1.1rem;
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
  margin-bottom: 60px;
}

/* 资料卡片 */
.resource-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.resource-card:hover {
  border-color: var(--ocean-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.badge-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}

.badge-tag.exam {
  background: var(--exam-bg);
  color: var(--exam-color);
}

.badge-tag.course {
  background: var(--course-bg);
  color: var(--course-color);
}

.filetype-text {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  background: var(--bg-subtle);
  padding: 2px 6px;
  border-radius: 4px;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.4;
  margin-bottom: 10px;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.5;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--ocean-gradient);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  transition: var(--transition);
}

.btn-download:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-copy-code {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition);
}

.btn-copy-code:hover {
  border-color: var(--ocean-primary);
  color: var(--ocean-primary);
}

/* ================= 模态弹窗与 Toast ================= */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 540px;
  box-shadow: var(--shadow-lg);
  padding: 24px;
}

.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.modal-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-title);
  line-height: 1.35;
}

.modal-close {
  font-size: 1.3rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 8px;
}

.modal-close:hover {
  color: var(--text-main);
}

.modal-links-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 18px 0;
}

.modal-link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.link-name {
  font-weight: 700;
  font-size: 0.92rem;
}

.link-code {
  font-size: 0.8rem;
  color: var(--ocean-primary);
  background: var(--bg-surface);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 8px;
  font-family: monospace;
}

/* Toast 轻提示 */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 10px 18px;
  background: var(--text-title);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  box-shadow: var(--shadow-lg);
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ================= 科目列表页与试卷详情页专属样式 ================= */
.page-top-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 24px 0 16px 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.breadcrumb-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.breadcrumb-item {
  color: var(--text-body);
  font-weight: 500;
  transition: var(--transition);
}

.breadcrumb-item:hover {
  color: var(--ocean-primary);
}

.breadcrumb-sep {
  color: var(--border-color);
}

.breadcrumb-current {
  color: var(--ocean-primary);
  font-weight: 700;
}

.btn-back {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-title);
  transition: var(--transition);
}

.btn-back:hover {
  background: var(--ocean-primary);
  color: #fff;
  border-color: var(--ocean-primary);
}

.page-header-box {
  max-width: 960px;
  margin: 0 auto 28px auto;
  text-align: center;
}

.page-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background: var(--ocean-subtle);
  color: var(--ocean-primary);
  border-radius: 99px;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-main-title {
  font-size: 2rem;
  font-weight: 900;
  color: var(--text-title);
  margin-bottom: 8px;
}

.page-main-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* 科目模块列表 (从上至下依次排布) */
.subjects-list-container {
  max-width: 960px;
  margin: 0 auto 60px auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.subject-card-module {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 鼠标悬停在科目卡片上时四周光亮 */
.subject-card-module:hover {
  border-color: var(--ocean-primary);
  box-shadow: 0 0 22px rgba(2, 132, 199, 0.35), 0 0 0 1px var(--ocean-primary), var(--shadow-md);
  transform: translateY(-2px);
}

.subject-card-left {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: 1;
}

.subject-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  color: var(--ocean-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.subject-card-module:hover .subject-icon-box {
  background: var(--ocean-primary);
  color: #fff;
}

.subject-card-content {
  display: flex;
  flex-direction: column;
}

.subject-tags-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.subject-num-badge {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--ocean-primary);
  background: var(--ocean-subtle);
  padding: 2px 6px;
  border-radius: 4px;
}

.badge-tag-sm {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
}

.badge-tag-sm.college {
  background: var(--bg-subtle);
  color: var(--text-muted);
}

.badge-tag-sm.type {
  background: #e0f2fe;
  color: #0284c7;
}

.subject-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 6px;
}

.subject-card-desc {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.5;
}

.subject-card-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  flex-shrink: 0;
}

.subject-papers-count {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.btn-subject-enter {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  background: var(--ocean-gradient);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
  transition: var(--transition);
}

.btn-subject-enter:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* 科目试卷详情页具体试卷列表 */
.subject-header-banner {
  max-width: 960px;
  margin: 0 auto 28px auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.subject-banner-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.subject-banner-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--ocean-subtle);
  color: var(--ocean-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  flex-shrink: 0;
}

.subject-banner-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.subject-banner-title {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--text-title);
  margin-bottom: 6px;
}

.subject-banner-desc {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.5;
}

/* ================= 科目内试卷搜索栏 & 联想提示 ================= */
.subject-search-container {
  max-width: 960px;
  margin: 0 auto 24px auto;
  position: relative;
}

.subject-search-box-wrap {
  position: relative;
  width: 100%;
}

.subject-search-box {
  display: flex;
  align-items: center;
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 6px 8px 6px 16px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.subject-search-box:focus-within {
  border-color: var(--ocean-primary);
  box-shadow: 0 0 16px rgba(2, 132, 199, 0.25), 0 0 0 1px var(--ocean-primary);
}

.search-box-icon {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-right: 10px;
}

.subject-search-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 0.95rem;
  color: var(--text-title);
  outline: none;
  font-family: inherit;
}

.subject-search-input::placeholder {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.subject-search-clear {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 0.9rem;
  border-radius: 50%;
  transition: var(--transition);
}

.subject-search-clear:hover {
  color: var(--text-title);
}

.subject-search-submit-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  background: var(--ocean-gradient);
  color: #fff;
  border: none;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.subject-search-submit-btn:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

/* 联想提示下拉菜单 */
.search-suggest-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  display: none;
  max-height: 380px;
  overflow-y: auto;
  animation: fadeIn 0.2s ease;
}

.search-suggest-dropdown.active {
  display: block;
}

.suggest-header {
  padding: 10px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ocean-primary);
  background: var(--ocean-subtle);
  border-bottom: 1px solid var(--border-color);
}

.suggest-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  transition: background 0.15s ease;
}

.suggest-item:last-child {
  border-bottom: none;
}

.suggest-item:hover {
  background: var(--bg-subtle);
}

.suggest-item-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  overflow: hidden;
}

.suggest-badge {
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--ocean-subtle);
  color: var(--ocean-primary);
  padding: 2px 6px;
  border-radius: 4px;
  flex-shrink: 0;
}

.suggest-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-title);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.suggest-highlight {
  color: var(--ocean-primary);
  background: #e0f2fe;
  padding: 0 2px;
  border-radius: 2px;
  font-weight: 800;
}

.suggest-year {
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-left: 12px;
}

.suggest-empty {
  padding: 24px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* 高亮闪烁动画 */
.card-highlight-flash {
  animation: cardGlowPulse 2.5s ease-out;
}

@keyframes cardGlowPulse {
  0% {
    border-color: var(--ocean-primary);
    box-shadow: 0 0 30px rgba(2, 132, 199, 0.7), 0 0 0 3px var(--ocean-primary);
    transform: scale(1.01);
  }
  50% {
    border-color: var(--ocean-primary);
    box-shadow: 0 0 22px rgba(2, 132, 199, 0.4), 0 0 0 2px var(--ocean-primary);
  }
  100% {
    border-color: var(--border-color);
    box-shadow: var(--shadow-sm);
    transform: scale(1);
  }
}

.papers-list-header {
  max-width: 960px;
  margin: 0 auto 16px auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.papers-list-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-title);
}

.papers-list-count {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.papers-vertical-list {
  max-width: 960px;
  margin: 0 auto 60px auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.paper-item-module {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 试卷条目悬停时四周发光 */
.paper-item-module:hover {
  border-color: var(--ocean-primary);
  box-shadow: 0 0 22px rgba(2, 132, 199, 0.35), 0 0 0 1px var(--ocean-primary), var(--shadow-md);
  transform: translateY(-2px);
}

.paper-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.paper-item-badges {
  display: flex;
  align-items: center;
  gap: 8px;
}

.paper-index-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
}

.paper-item-year {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.paper-item-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
}

.paper-item-desc {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.5;
  margin-bottom: 16px;
}

.paper-item-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 12px;
}

.paper-meta-info {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.paper-action-btns {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ================= 页脚 ================= */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-surface);
  padding: 32px 0;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-motto {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ocean-primary);
  margin-bottom: 8px;
}

/* ================= 优秀学长案例 - 核心简介突出展示卡片 (简介.md) ================= */
.senior-profile-showcase {
  max-width: 960px;
  width: 100%;
  margin: 0 auto 28px auto;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 45%, #ffffff 100%);
  border: 2px solid #38bdf8;
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  align-items: center;
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
}

.senior-profile-showcase::before {
  content: "👑";
  position: absolute;
  right: -10px;
  bottom: -20px;
  font-size: 8rem;
  opacity: 0.05;
  pointer-events: none;
  user-select: none;
}

.senior-profile-info {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.senior-profile-badge-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.senior-profile-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: linear-gradient(135deg, #0284c7, #0369a1);
  color: #ffffff;
  border-radius: 99px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: 0 3px 8px rgba(2, 132, 199, 0.25);
}

.senior-profile-subject-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-title);
  margin: 0;
}

.senior-profile-headline {
  font-size: 1.45rem;
  font-weight: 900;
  color: #0369a1;
  line-height: 1.35;
  margin: 0;
}

.senior-profile-quote {
  background: rgba(255, 255, 255, 0.95);
  border-left: 4px solid #0284c7;
  padding: 10px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: #0c4a6e;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.senior-profile-quote-sub {
  font-size: 0.95rem;
  font-weight: 700;
  color: #0284c7;
  margin-top: 4px;
}

.senior-profile-md-content {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.6;
  margin: 0;
}

.senior-profile-poster-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.senior-profile-poster-img {
  width: 100%;
  max-width: 320px;
  max-height: 260px;
  object-fit: contain;
  background: #ffffff;
  border-radius: var(--radius-sm);
  border: 2px solid #ffffff;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: block;
}

.senior-profile-poster-img:hover {
  transform: scale(1.02);
}

.senior-profile-poster-hint {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--ocean-primary);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ================= 移动端响应式适配 ================= */
@media (max-width: 860px) {
  .hero-banner-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero-poster-container {
    max-width: 100%;
    height: 320px;
    margin: 0 auto;
  }

  .hero-main-title {
    font-size: 1.6rem;
  }

  .big-category-tabs {
    grid-template-columns: 1fr;
  }

  .subject-card-module {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .subject-card-right {
    align-items: flex-start;
    width: 100%;
  }

  .page-top-bar {
    flex-direction: column;
    gap: 12px;
  }

  .btn-back {
    position: static;
    transform: none;
    align-self: flex-start;
  }

  .senior-profile-showcase {
    grid-template-columns: 1fr;
    padding: 20px;
    gap: 20px;
  }

  .senior-profile-poster-wrap {
    width: 100%;
  }

  .senior-profile-poster-img {
    max-width: 260px;
  }

  .senior-profile-quote {
    border-left: none;
    border-top: 3px solid #0284c7;
    border-radius: var(--radius-sm);
  }

  .upload-nav-tip {
    display: none;
  }
}