body { margin: 0; padding: 0; background: #333; display: flex; justify-content: center; }

#center1_mobile_wrap {
    width: 380px; margin: 0 auto; padding: 15px 10px; background: #f4f5f7; box-sizing: border-box; overflow-x: hidden; font-family: "Microsoft YaHei", sans-serif; min-height: 100vh;
}

#top1_header_container {
    position: relative; display: flex; justify-content: center; align-items: center; margin: 0 0 8px; padding: 5px 0;
}

#top1_main_title {
    font-size: 18px; color: #1E5BB8; text-align: center; margin: 0; line-height: 1.4;
}

#top1_hamburger_menu {
    position: absolute; right: 5px; top: 50%; transform: translateY(-50%); width: 22px; height: 16px; display: flex; flex-direction: column; justify-content: space-between; cursor: pointer;
}

#top1_hamburger_line1 { width: 100%; height: 3px; background-color: #1E5BB8; border-radius: 2px; }
#top1_hamburger_line2 { width: 100%; height: 3px; background-color: #1E5BB8; border-radius: 2px; }
#top1_hamburger_line3 { width: 100%; height: 3px; background-color: #1E5BB8; border-radius: 2px; }

#top2_sub_title {
    font-size: 12px; color: #666; text-align: center; margin: 0 0 16px; padding: 0 5px; line-height: 1.5;
}

#right1_bottom1_back_top {
    position: fixed; left: calc(50% + 131px); top: 50%; transform: translateY(-50%); width: 44px; height: 44px; background-color: #1E5BB8; color: #fff; border-radius: 50%; display: flex; flex-direction: column; justify-content: center; align-items: center; font-size: 12px; box-shadow: 0 2px 6px rgba(0,0,0,0.3); cursor: pointer; z-index: 1000; line-height: 1.2;
}

/* Section 1: 大会基础信息 */
#center2_sec_1, #center3_sec_2, #center4_sec_3, #center5_sec_4, #center6_sec_5,
#center7_sec_6, #center8_sec_7, #center9_sec_8, #center10_sec_9 {
    background: #fff; border-radius: 8px; padding: 15px; margin: 0 0 12px; box-shadow: 0 1px 4px rgba(0,0,0,.06);
}

/* 目录 section */
#center2_toc_section {
    background: #fff; border-radius: 8px; padding: 15px; margin: 0 0 12px; box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
#center2_toc_section_h2_1 {
    font-size: 16px; color: #fff; background: #1E5BB8; padding: 6px 12px; border-radius: 4px; margin: 0 0 12px;
}
#center2_toc_section_ul_1 {
    display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0;
}
#center2_toc_section_li_1, #center2_toc_section_li_2, #center2_toc_section_li_3,
#center2_toc_section_li_4, #center2_toc_section_li_5, #center2_toc_section_li_6,
#center2_toc_section_li_7, #center2_toc_section_li_8, #center2_toc_section_li_9 {
    width: calc(50% - 4px);
    box-sizing: border-box;
    background-color: #eef2f9;
    color: #1E5BB8;
    border: 1px solid #d6deec;
    border-radius: 6px;
    padding: 10px 8px;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}
#center2_toc_section_li_1:active, #center2_toc_section_li_2:active, #center2_toc_section_li_3:active,
#center2_toc_section_li_4:active, #center2_toc_section_li_5:active, #center2_toc_section_li_6:active,
#center2_toc_section_li_7:active, #center2_toc_section_li_8:active, #center2_toc_section_li_9:active {
    background-color: #1E5BB8;
    color: #ffffff;
    transform: scale(0.97);
}

#center2_sec_1_h2_1, #center3_sec_2_h2_1, #center4_sec_3_h2_1, #center5_sec_4_h2_1, #center6_sec_5_h2_1,
#center7_sec_6_h2_1, #center8_sec_7_h2_1, #center9_sec_8_h2_1, #center10_sec_9_h2_1 {
    font-size: 16px; color: #fff; background: #1E5BB8; padding: 6px 12px; border-radius: 4px; margin: 0 0 12px;
}

#center2_sec_1_p_1, #center2_sec_1_p_2, #center2_sec_1_p_3, #center2_sec_1_p_4, #center2_sec_1_p_5, #center2_sec_1_p_6,
#center3_sec_2_p_1, #center3_sec_2_p_2, #center3_sec_2_p_3, #center3_sec_2_p_4, #center3_sec_2_p_5,
#center4_sec_3_p_1, #center4_sec_3_p_2, #center4_sec_3_p_3, #center4_sec_3_p_4, #center4_sec_3_p_5, #center4_sec_3_p_6,
#center5_sec_4_p_1, #center5_sec_4_p_2, #center5_sec_4_p_3, #center5_sec_4_p_4, #center5_sec_4_p_5, #center5_sec_4_p_6,
#center6_sec_5_p_1, #center6_sec_5_p_2, #center6_sec_5_p_3, #center6_sec_5_p_4, #center6_sec_5_p_5, #center6_sec_5_p_6, #center6_sec_5_p_7, #center6_sec_5_p_8, #center6_sec_5_p_9, #center6_sec_5_p_10,
#center7_sec_6_p_1, #center7_sec_6_p_2, #center7_sec_6_p_3, #center7_sec_6_p_4, #center7_sec_6_p_5, #center7_sec_6_p_6,
#center8_sec_7_p_1, #center8_sec_7_p_2, #center8_sec_7_p_3,
#center9_sec_8_p_1, #center9_sec_8_p_2, #center9_sec_8_p_3, #center9_sec_8_p_4, #center9_sec_8_p_5,
#center10_sec_9_p_1, #center10_sec_9_p_2, #center10_sec_9_p_3, #center10_sec_9_p_4, #center10_sec_9_p_5, #center10_sec_9_p_6, #center10_sec_9_p_7 {
    font-size: 13px; color: #333; line-height: 1.7; margin: 8px 0;
}

/* 二级标题（橙色） */
#center6_sec_5_h3_1, #center6_sec_5_h3_3, #center6_sec_5_h3_4, #center6_sec_5_h3_5,
#center6_sec_5_h3_2, #center6_sec_5_h3_6, #center6_sec_5_h3_7 {
    font-size: 14px; color: #E67E22; font-weight: bold; margin: 12px 0 6px; padding-left: 4px; border-left: 3px solid #E67E22;
}

/* 列表 */
#center2_sec_1_ul_1, #center6_sec_5_ul_1, #center6_sec_5_ul_2, #center6_sec_5_ul_3,
#center6_sec_5_ul_4, #center6_sec_5_ul_5 {
    margin: 6px 0 6px 20px; padding: 0;
}

#center2_sec_1_li_1, #center2_sec_1_li_2, #center2_sec_1_li_3, #center2_sec_1_li_4, #center2_sec_1_li_5, #center2_sec_1_li_6,
#center6_sec_5_li_1, #center6_sec_5_li_2, #center6_sec_5_li_3, #center6_sec_5_li_4, #center6_sec_5_li_5, #center6_sec_5_li_6, #center6_sec_5_li_7, #center6_sec_5_li_8, #center6_sec_5_li_9, #center6_sec_5_li_10, #center6_sec_5_li_11, #center6_sec_5_li_12, #center6_sec_5_li_13, #center6_sec_5_li_14, #center6_sec_5_li_15, #center6_sec_5_li_16 {
    font-size: 13px; color: #333; line-height: 1.7; margin: 4px 0; list-style-type: disc;
}