* { margin: 0; padding: 0; box-sizing: border-box; }
  :root {
    --bg: #F5F7FA;            /* 页面底色：浅灰蓝 */
    --sidebar-bg: #F0F3F8;    /* 侧边栏底色 */
    --card: #FFFFFF;
    --primary: #2F86FF;
    --text-1: #1A1F2E;        /* 一级文字：深炭黑 */
    --text-2: #4E5969;        /* 二级文字：中灰 */
    --text-3: #86909C;        /* 三级文字：浅灰 */
    --line: #E5E7EB;
    /* 品类色 */
    --c-movie: #FF7D29;
    --c-drama: #2F86FF;
    --c-show:  #EC4899;
    --c-anime: #22C55E;
    --c-doc:   #8B5CF6;
    --card-shadow: 0 2px 10px rgba(26,31,46,0.05);
    --card-shadow-hover: 0 8px 24px rgba(26,31,46,0.10);
  }
  body {
    background: var(--bg);
    color: var(--text-1);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    transition: background 0.4s ease;
  }

  /* ===== 整体布局：左固定侧边栏 + 右滚动内容区 ===== */
  .sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: 224px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--line);
    padding: 28px 16px 20px;
    display: flex;
    flex-direction: column;
    z-index: 50;
    transition: background 0.4s ease;
  }
  .brand h1 {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-1);
    letter-spacing: 1px;
  }
  .brand p {
    font-size: 12px;
    color: var(--text-3);
    margin-top: 4px;
  }
  .side-search { margin: 18px 0 20px; position: relative; }
  .side-search input {
    width: 100%;
    padding: 8px 12px 8px 32px;
    font-size: 13px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #fff;
    outline: none;
    font-family: inherit;
    color: var(--text-1);
    transition: border-color 0.18s, box-shadow 0.18s;
  }
  .side-search input::placeholder { color: var(--text-3); }
  .side-search input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,134,255,0.12); }
  .side-search::before {
    content: '🔍';
    position: absolute;
    left: 12px; top: 50%;
    transform: translateY(-50%);
    font-size: 12px; opacity: 0.45;
    pointer-events: none;
  }
  .side-label {
    font-size: 12px;
    color: var(--text-3);
    margin: 0 8px 8px;
  }
  .side-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    margin-bottom: 4px;
    font-size: 14px;
    color: var(--text-2);
    background: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    text-align: left;
    transition: background 0.18s, box-shadow 0.18s, color 0.18s;
  }
  .side-item .dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
  }
  .side-item:hover { background: #fff; box-shadow: 0 2px 8px rgba(26,31,46,0.06); }
  .side-item.active {
    background: rgba(47,134,255,0.12);
    color: var(--primary);
    font-weight: 600;
  }
  .side-foot {
    margin-top: auto;
    font-size: 11px;
    color: var(--text-3);
    padding: 0 8px;
  }
  .side-foot .demo-tag {
    display: inline-block;
    color: var(--c-movie);
    background: #FFF0E6;
    padding: 2px 10px;
    border-radius: 6px;
    margin-bottom: 6px;
  }

  .content {
    margin-left: 224px;
    padding: 24px 32px 60px;
    max-width: 1080px;
  }

  /* ===== 顶部轮播 Banner ===== */
  .banner {
    position: relative;
    height: 300px;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    margin-bottom: 24px;
  }
  .slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center 30%;
    opacity: 0;
    transition: opacity 0.7s ease;
  }
  .slide.on { opacity: 1; }
  /* 底部渐变蒙层：透明 -> 半透深灰，保证白字可读 */
  .slide::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(26,31,46,0) 30%, rgba(26,31,46,0.55) 78%, rgba(26,31,46,0.68) 100%);
  }
  .slide-info {
    position: absolute;
    left: 28px; right: 80px; bottom: 24px;
    z-index: 2;
    color: #fff;
  }
  .slide-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    padding: 3px 12px;
    border-radius: 999px;
    margin-bottom: 10px;
  }
  .slide-info h2 {
    font-size: 24px;
    font-weight: 800;
    line-height: 1.35;
    margin-bottom: 6px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
  }
  .slide-info p {
    font-size: 13px;
    color: rgba(255,255,255,0.88);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
  .banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 36px; height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.35);
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    backdrop-filter: blur(4px);
    transition: background 0.18s;
  }
  .banner-arrow:hover { background: rgba(255,255,255,0.55); }
  .banner-arrow.prev { left: 14px; }
  .banner-arrow.next { right: 14px; }
  .banner-dots {
    position: absolute;
    right: 24px; bottom: 20px;
    z-index: 3;
    display: flex;
    gap: 8px;
  }
  .banner-dots span {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.45);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
  }
  .banner-dots span.on { background: #fff; transform: scale(1.25); }

  /* ===== 时间范围筛选胶囊 ===== */
  .range-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    flex-wrap: wrap;
  }
  .range-label { font-size: 13px; color: var(--text-3); margin-right: 4px; }
  .chip {
    padding: 6px 16px;
    font-size: 13px;
    border-radius: 999px;
    border: none;
    background: #fff;
    color: var(--text-2);
    cursor: pointer;
    transition: all 0.18s;
    font-family: inherit;
    box-shadow: var(--card-shadow);
  }
  .chip:hover { color: var(--primary); }
  .chip.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(47,134,255,0.28);
  }

  /* ===== 时间线 ===== */
  .timeline { position: relative; }
  /* 贯穿竖线：极浅灰，弱化存在感 */
  .timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 56px;
    bottom: 40px;
    width: 0;
    border-left: 2px solid var(--line);
  }
  .day-group { margin-bottom: 26px; }
  .day-head {
    font-size: 16px;
    font-weight: 800;
    color: var(--text-1);
    margin-bottom: 14px;
    padding-left: 28px;
    position: relative;
  }
  .tl-item {
    position: relative;
    padding-left: 28px;
    margin-bottom: 14px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }
  .tl-item.visible { opacity: 1; transform: translateY(0); }
  /* 时间节点：品类色实心圆点；待上线为空心；两种状态外圈尺寸一致 */
  .tl-node {
    position: absolute;
    left: 0;
    top: 22px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--tc, var(--primary));
    box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--tc, var(--primary));
    z-index: 2;
  }
  .tl-node.pending {
    background: #fff;
  }

  /* ===== 资讯卡片：白卡轻影 + 左侧品类色边 + 2:3 竖版海报 ===== */
  .card {
    position: relative;
    display: flex;
    gap: 16px;
    background: var(--card);
    border-radius: 8px;
    padding: 16px 18px 14px 20px;
    box-shadow: var(--card-shadow);
    cursor: pointer;
    transition: box-shadow 0.22s, transform 0.22s;
  }
  /* 左侧 2px 品类色竖边 */
  .card::before {
    content: '';
    position: absolute;
    left: 0; top: 12px; bottom: 12px;
    width: 2px;
    border-radius: 2px;
    background: var(--tc, var(--primary));
    transition: width 0.22s;
  }
  .card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
  }
  .card:hover::before { width: 4px; }
  /* 2:3 竖版海报封面 */
  .poster {
    width: 92px;
    flex-shrink: 0;
    align-self: flex-start;
    aspect-ratio: 2 / 3;
    border-radius: 6px;
    overflow: hidden;
    background: var(--sidebar-bg);
  }
  .poster img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
  }
  .card:hover .poster img { transform: scale(1.06); }
  .card-main { flex: 1; min-width: 0; }
  .card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 6px;
  }
  /* 时分标注：中灰弱化 */
  .card-time {
    font-size: 12px;
    color: var(--text-2);
  }
  /* 类型标签：低饱和彩色填充 + 白字胶囊 */
  .tag-solid {
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    padding: 2px 12px;
    border-radius: 999px;
    background: var(--tc, var(--primary));
    flex-shrink: 0;
  }
  .card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-1);
    line-height: 1.5;
    margin-bottom: 6px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
  .card-summary {
    font-size: 13px;
    color: var(--text-2);
    line-height: 1.7;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }
  .source {
    font-size: 12px;
    color: var(--text-3);
  }
  .src-btn {
    font-size: 12px;
    color: var(--text-3);
    text-decoration: none;
    border: 1px solid var(--line);
    padding: 4px 12px;
    border-radius: 999px;
    transition: color 0.15s, border-color 0.15s;
    flex-shrink: 0;
  }
  .src-btn:hover { color: var(--primary); border-color: var(--primary); }
  /* 详情展开区 */
  .detail {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, margin 0.4s ease, padding 0.4s ease;
    border-top: 1px solid transparent;
  }
  .detail.open {
    max-height: 600px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
  }
  .detail p {
    font-size: 13px;
    color: var(--text-2);
    line-height: 1.8;
    margin-bottom: 10px;
  }
  .detail .meta-line {
    font-size: 12px;
    color: var(--text-3);
  }
  .detail .meta-line strong { color: var(--text-2); font-weight: 600; }
  .detail-hint {
    font-size: 11px;
    color: var(--text-3);
    margin-left: 8px;
  }

  .empty-tip {
    text-align: center;
    color: var(--text-3);
    padding: 60px 0;
    font-size: 14px;
  }

  /* ===== 底部说明 ===== */
  .footer {
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    text-align: center;
  }
  .footer p {
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.8;
  }
  .footer .version {
    margin-top: 8px;
    font-weight: 600;
    color: var(--text-2);
  }

  /* ===== 回到顶部：白底 + 主色图标 ===== */
  .back-top {
    position: fixed;
    right: 32px;
    bottom: 32px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #fff;
    color: var(--primary);
    border: 1px solid var(--line);
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(26,31,46,0.12);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s, transform 0.25s;
    z-index: 90;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .back-top.show { opacity: 1; pointer-events: auto; }
  .back-top:hover { transform: translateY(-3px); }