/* 中国核学会研究堆与新堆分会第三届学术年会 · 学术严肃风格 */

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

:root {
    --primary: #1a3a6e;
    --primary-dark: #0f2547;
    --primary-light: #2d5591;
    --accent: #8b0000;
    --accent-dark: #6b0000;
    --text: #2c2c2c;
    --text-light: #606060;
    --text-muted: #8a8a8a;
    --bg-light: #f7f8fa;
    --bg-paper: #fbfbfb;
    --border: #dcdfe6;
    --border-light: #eaecef;
    --shadow: 0 1px 3px rgba(0,0,0,0.06);
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    line-height: 1.75;
    background: #fff;
    font-size: 15px;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary);
}

img {
    max-width: 100%;
    display: block;
}

/* 衬线字体用于标题 */
.serif {
    font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", "宋体", serif;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部信息栏 */
.top-bar {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.85);
    padding: 8px 0;
    font-size: 13px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.top-bar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar a {
    color: rgba(255,255,255,0.75);
    margin-left: 18px;
}

.top-bar a:hover {
    color: #fff;
}

.top-bar i {
    margin-right: 5px;
    opacity: 0.8;
}

/* 头部 */
.header {
    background: #fff;
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
}

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

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
    font-size: 20px;
    font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
    letter-spacing: -1px;
}

/* 主办单位 logo 横排 */
.logo-organizers {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-right: 14px;
    border-right: 1px solid var(--border-light);
}

.logo-organizers img {
    height: 44px;
    width: auto;
    object-fit: contain;
    display: block;
}

.logo-text h1 {
    font-size: 16px;
    color: var(--primary-dark);
    font-weight: 700;
    line-height: 1.3;
    white-space: nowrap;
    font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
}

.logo-text p {
    font-size: 11px;
    color: var(--text-light);
    margin-top: 3px;
    letter-spacing: 0.3px;
    white-space: nowrap;
}

/* 导航 */
.nav {
    display: flex;
    align-items: center;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 0;
}

.nav a {
    display: block;
    padding: 12px 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    position: relative;
    transition: color 0.2s;
    white-space: nowrap;
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
}

.nav a.active::after,
.nav a:hover::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 15%;
    width: 70%;
    height: 2px;
    background: var(--primary);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--primary);
    cursor: pointer;
    padding: 8px;
}

/* Banner 主视觉:固定高度 + 主图按高度自适应宽度,边缘羽化融入模糊背景 */
.banner {
    border-bottom: 3px solid var(--accent);
    overflow: hidden;
    width: 100%;
    height: 780px;
    position: relative;
    background-color: var(--primary-dark);
}
/* 兜底:同一张图模糊放大铺满,作为两边延伸 */
.banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url("../assets/banner-yantai-2026.jpeg") center/cover no-repeat;
    filter: blur(50px) brightness(0.85) saturate(1.1);
    transform: scale(1.2);
    z-index: 0;
}
/* 主图:height 撑满容器,width 按比例自动 → 元素宽度=实际显示宽度,mask 才有效 */
.banner-image {
    display: block;
    position: relative;
    z-index: 1;
    height: 100%;
    width: auto;
    max-width: 100%;
    margin: 0 auto;
    /* 主图左右边缘羽化到透明,与模糊背景柔融合 */
    -webkit-mask-image: linear-gradient(
        to right,
        transparent 0%,
        rgba(0,0,0,0.5) 5%,
        #000 12%,
        #000 88%,
        rgba(0,0,0,0.5) 95%,
        transparent 100%
    );
            mask-image: linear-gradient(
        to right,
        transparent 0%,
        rgba(0,0,0,0.5) 5%,
        #000 12%,
        #000 88%,
        rgba(0,0,0,0.5) 95%,
        transparent 100%
    );
}
@media (max-width: 1100px) {
    .banner { height: 580px; }
}
@media (max-width: 768px) {
    .banner { height: auto; }
    .banner-image {
        height: auto;
        width: 100%;
        /* 手机上图片基本占满,只小幅度羽化 */
        -webkit-mask-image: linear-gradient(
            to right,
            transparent 0%, #000 3%, #000 97%, transparent 100%
        );
                mask-image: linear-gradient(
            to right,
            transparent 0%, #000 3%, #000 97%, transparent 100%
        );
    }
    .banner::before { filter: blur(20px) brightness(0.85); }
}

/* 关键信息条(替代原 banner 内的文字叠加) */
.banner-info-strip {
    background: linear-gradient(180deg, #ffffff 0%, var(--bg-light) 100%);
    border-bottom: 1px solid var(--border-light);
    padding: 26px 0;
}
.info-strip-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
}
.info-strip-item {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1 1 200px;
    min-width: 200px;
}
.info-strip-item .icon {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--primary-dark);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}
.info-strip-item .label {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    margin-bottom: 4px;
}
.info-strip-item .value {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-dark);
    font-family: "Noto Serif SC", "Songti SC", serif;
}
.info-strip-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
    flex-shrink: 0;
}
@media (max-width: 768px) {
    .info-strip-divider { display: none; }
    .info-strip-item { flex: 1 1 100%; }
    .info-strip-item .value { font-size: 14px; }
}

/* 倒计时 */
.countdown-section {
    background: #fff;
    margin-top: 40px;
    position: relative;
    z-index: 2;
    border: 1px solid var(--border-light);
    padding: 35px 30px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow);
}

.countdown-title {
    text-align: center;
    color: var(--primary-dark);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 22px;
    letter-spacing: 3px;
    font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
}

.countdown-title::before,
.countdown-title::after {
    content: "";
    display: inline-block;
    width: 30px;
    height: 1px;
    background: var(--border);
    vertical-align: middle;
    margin: 0 15px;
}

.countdown {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
}

.countdown-box {
    min-width: 100px;
    padding: 18px 15px;
    background: var(--primary-dark);
    text-align: center;
    color: #fff;
    border-bottom: 2px solid var(--accent);
}

.countdown-number {
    font-size: 38px;
    font-weight: 700;
    line-height: 1;
    font-family: "Georgia", "Times New Roman", serif;
}

.countdown-label {
    font-size: 12px;
    margin-top: 8px;
    color: rgba(255,255,255,0.75);
    letter-spacing: 2px;
}

/* 通用 section */
.section {
    padding: 70px 0;
}

.section-light {
    background: #fff;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 28px;
    color: var(--primary-dark);
    font-weight: 700;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
    font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
    letter-spacing: 2px;
}

.section-title h2::before,
.section-title h2::after {
    content: "";
    position: absolute;
    top: 50%;
    width: 40px;
    height: 1px;
    background: var(--border);
    transform: translateY(-50%);
}

.section-title h2::before {
    left: -60px;
}

.section-title h2::after {
    right: -60px;
}

.section-title .divider {
    width: 40px;
    height: 2px;
    background: var(--accent);
    margin: 0 auto 12px;
}

.section-title p {
    color: var(--text-light);
    font-size: 14px;
    margin-top: 10px;
    letter-spacing: 2px;
}

/* 会议概况卡片 */
.overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 0;
    border: 1px solid var(--border-light);
}

.overview-card {
    background: #fff;
    padding: 35px 28px;
    border-right: 1px solid var(--border-light);
    transition: background 0.2s;
}

.overview-card:last-child {
    border-right: none;
}

.overview-card:hover {
    background: var(--bg-light);
}

.overview-card .icon {
    width: 44px;
    height: 44px;
    border: 1px solid var(--primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: 18px;
}

.overview-card h3 {
    font-size: 17px;
    color: var(--primary-dark);
    margin-bottom: 10px;
    font-weight: 600;
    font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
}

.overview-card p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.7;
}

@media (max-width: 768px) {
    .overview {
        grid-template-columns: 1fr 1fr;
    }
    .overview-card {
        border-bottom: 1px solid var(--border-light);
    }
    .overview-card:nth-child(2n) {
        border-right: none;
    }
}

/* 主题/议题网格 */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 0;
    border-top: 1px solid var(--border-light);
    border-left: 1px solid var(--border-light);
}

.topic-item {
    background: #fff;
    padding: 25px;
    border-right: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: flex-start;
    gap: 15px;
    transition: background 0.2s;
}

.topic-item:hover {
    background: var(--bg-light);
}

.topic-number {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    font-family: "Georgia", "Times New Roman", serif;
}

.topic-item:hover .topic-number {
    background: var(--primary);
    color: #fff;
}

.topic-content h4 {
    font-size: 15px;
    color: var(--primary-dark);
    margin-bottom: 5px;
    font-weight: 600;
}

/* 时间节点 */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 50px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-left: 100px;
    margin-bottom: 28px;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: 44px;
    top: 22px;
    width: 13px;
    height: 13px;
    background: #fff;
    border: 2px solid var(--primary);
    border-radius: 50%;
}

.timeline-item.active::before {
    background: var(--accent);
    border-color: var(--accent);
}

.timeline-date {
    font-weight: 700;
    color: var(--primary);
    font-size: 15px;
    font-family: "Georgia", "Times New Roman", serif;
}

.timeline-content {
    background: #fff;
    padding: 18px 22px;
    border: 1px solid var(--border-light);
    margin-top: 8px;
}

.timeline-content h4 {
    color: var(--primary-dark);
    margin-bottom: 5px;
    font-size: 15px;
    font-weight: 600;
}

.timeline-content p {
    color: var(--text-light);
    font-size: 14px;
}

/* 内容页通用 - 白底简洁风 */
.page-header {
    background: #fff;
    color: var(--primary-dark);
    padding: 60px 0 40px;
    text-align: center;
    border-bottom: 1px solid var(--border-light);
    position: relative;
}

.page-header h1 {
    font-size: 32px;
    margin-bottom: 12px;
    font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--primary-dark);
}

.page-header .divider {
    width: 50px;
    height: 2px;
    background: var(--accent);
    margin: 0 auto 15px;
}

.page-header .breadcrumb {
    font-size: 13px;
    color: var(--text-light);
    letter-spacing: 1px;
}

.page-header .breadcrumb a {
    color: var(--text-light);
}

.page-header .breadcrumb a:hover {
    color: var(--primary);
}

.content-wrap {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 40px;
    padding: 50px 0;
}

.content-main {
    background: #fff;
    padding: 45px 50px;
    border: 1px solid var(--border-light);
}

.content-main h2 {
    color: var(--primary-dark);
    font-size: 22px;
    margin: 32px 0 18px;
    padding-left: 14px;
    border-left: 3px solid var(--primary);
    font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
    font-weight: 600;
    letter-spacing: 1px;
}

.content-main h2:first-child {
    margin-top: 0;
}

.content-main h3 {
    color: var(--primary-dark);
    font-size: 17px;
    margin: 25px 0 12px;
    font-weight: 600;
}

.content-main h3 i {
    color: var(--primary);
    margin-right: 8px;
    font-size: 15px;
}

.content-main p {
    margin-bottom: 15px;
    color: var(--text);
    font-size: 15px;
    line-height: 1.9;
    text-align: justify;
}

.content-main ul, .content-main ol {
    margin: 15px 0 15px 25px;
    color: var(--text);
}

.content-main li {
    margin-bottom: 8px;
    line-height: 1.85;
}

.content-main strong {
    color: var(--primary-dark);
}

.highlight-box {
    background: var(--bg-light);
    border-left: 3px solid var(--primary);
    padding: 18px 22px;
    margin: 20px 0;
}

.highlight-box.accent {
    border-left-color: var(--accent);
}

.highlight-box i.label-icon {
    color: var(--primary);
    margin-right: 8px;
}

.highlight-box.accent i.label-icon {
    color: var(--accent);
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 14px;
}

.info-table th,
.info-table td {
    padding: 12px 16px;
    border: 1px solid var(--border);
    text-align: left;
}

.info-table th {
    background: var(--primary-dark);
    color: #fff;
    font-weight: 600;
    letter-spacing: 1px;
}

.info-table tr:nth-child(even) td {
    background: var(--bg-light);
}

/* 侧边栏 */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar-card {
    background: #fff;
    border: 1px solid var(--border-light);
    overflow: hidden;
}

.sidebar-card-header {
    background: var(--primary-dark);
    color: #fff;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 2px;
    font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
    border-bottom: 2px solid var(--accent);
}

.sidebar-card-header i {
    margin-right: 8px;
    opacity: 0.85;
}

.sidebar-card-body {
    padding: 18px 20px;
    font-size: 14px;
}

.sidebar-card-body ul {
    list-style: none;
}

.sidebar-card-body li {
    padding: 10px 0;
    border-bottom: 1px dashed var(--border);
}

.sidebar-card-body li:last-child {
    border-bottom: none;
}

.sidebar-card-body li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text);
}

.sidebar-card-body li a:hover {
    color: var(--primary);
}

.sidebar-card-body .date {
    color: var(--text-muted);
    font-size: 12px;
    font-family: "Georgia", "Times New Roman", serif;
}

/* 下载列表 */
.download-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 18px;
}

.download-item {
    background: #fff;
    padding: 22px 25px;
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 18px;
    transition: all 0.2s;
}

.download-item:hover {
    border-color: var(--primary);
    background: var(--bg-light);
}

.download-icon {
    width: 46px;
    height: 46px;
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.download-item:hover .download-icon {
    background: var(--primary);
    color: #fff;
}

.download-info {
    flex: 1;
}

.download-info h4 {
    color: var(--primary-dark);
    margin-bottom: 5px;
    font-size: 15px;
    font-weight: 600;
}

.download-info p {
    color: var(--text-light);
    font-size: 13px;
}

.download-btn {
    background: transparent;
    color: var(--primary);
    padding: 7px 16px;
    border: 1px solid var(--primary);
    font-size: 13px;
    flex-shrink: 0;
    letter-spacing: 1px;
    transition: all 0.2s;
}

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

.download-btn i {
    margin-right: 5px;
}

/* 联系人卡片 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    margin: 25px 0;
}

.contact-card {
    background: #fff;
    padding: 22px 25px;
    border: 1px solid var(--border-light);
    border-top: 2px solid var(--primary);
    transition: border-top-color 0.2s;
}

.contact-card:hover {
    border-top-color: var(--accent);
}

.contact-card .role {
    display: inline-block;
    padding: 2px 10px;
    background: var(--bg-light);
    color: var(--primary);
    font-size: 12px;
    margin-bottom: 12px;
    letter-spacing: 1px;
    border: 1px solid var(--border-light);
}

.contact-card .name {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 10px;
    font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
    letter-spacing: 2px;
}

.contact-card .phone,
.contact-card .email {
    color: var(--text);
    font-size: 14px;
    margin-bottom: 5px;
}

.contact-card .phone::before,
.contact-card .email::before {
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--primary);
    margin-right: 8px;
    display: inline-block;
    width: 14px;
}

.contact-card .phone::before {
    content: "\f095";
}

.contact-card .email::before {
    content: "\f0e0";
}

/* 通用文字行内图标 */
.content-main h2 i,
.content-main h3 i,
.content-main p i,
.content-main li i {
    color: var(--primary);
    margin-right: 6px;
}

.content-main h2 i {
    margin-right: 10px;
}

/* 表单 */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--primary-dark);
    font-weight: 500;
    font-size: 14px;
}

.form-group label .required {
    color: var(--accent);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    font-size: 14px;
    font-family: inherit;
    background: #fff;
    transition: border-color 0.2s, box-shadow .2s;
    box-sizing: border-box;
    color: var(--text);
}
.form-group textarea { line-height: 1.6; resize: vertical; }
/* 统一 select 外观:去原生箭头 + 自绘 SVG 箭头 */
.form-group select {
    appearance: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    padding-right: 40px !important;
    height: 42px;
    line-height: 1.4;
    background: #fff url("../assets/icons/select-arrow.svg") no-repeat right 14px center / 11px 8px !important;
    cursor: pointer;
}
.form-group select:focus {
    background-image: url("../assets/icons/select-arrow-focus.svg") !important;
}
.form-group select option { color: var(--text); background: #fff; }
.form-group select::-ms-expand { display: none; }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(26, 58, 110, 0.08);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 10px 0;
}

.form-checkbox input {
    width: auto;
}

.btn {
    display: inline-block;
    padding: 11px 30px;
    background: var(--primary);
    color: #fff;
    border: 1px solid var(--primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    letter-spacing: 2px;
}

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

.btn i {
    margin-right: 6px;
}

.btn-accent {
    background: var(--accent);
    border-color: var(--accent);
}

.btn-accent:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
}

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

/* 合作期刊 */
.journals {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

/* 关于会议页:2×2 大卡片布局 + 真期刊 logo */
.journals-grid-2x2 {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 880px;
}
@media (max-width: 640px) {
    .journals-grid-2x2 { grid-template-columns: 1fr; }
}

.journal-item {
    padding: 22px 18px;
    background: #fff;
    text-align: center;
    border: 1px solid var(--border-light);
    transition: all 0.2s;
}

.journal-item:hover {
    border-color: var(--primary);
    background: var(--bg-light);
    box-shadow: 0 4px 16px rgba(26,58,110,0.08);
}

.journal-item .journal-icon {
    font-size: 26px;
    color: var(--primary);
    margin-bottom: 10px;
}

.journal-item .journal-cover {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 110px;
    margin-bottom: 14px;
    padding: 8px;
    background: #fff;
}
.journal-item .journal-cover img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

.journal-item .journal-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
}

/* 主办单位 */
.organizers {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 15px 0;
}

.organizer-tag {
    padding: 7px 16px;
    background: #fff;
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 14px;
}

.organizer-tag.main {
    background: var(--primary);
    color: #fff;
}

/* 底部 */
.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.85);
    padding: 50px 0 22px;
    border-top: 3px solid var(--accent);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 35px;
}

.footer-section h4 {
    color: #fff;
    font-size: 15px;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
    letter-spacing: 2px;
    font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
    font-weight: 600;
}

.footer-section h4::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 28px;
    height: 2px;
    background: var(--accent);
}

.footer-section p {
    font-size: 13px;
    line-height: 1.9;
    color: rgba(255,255,255,0.7);
    margin-bottom: 6px;
}

.footer-section p i {
    color: rgba(255,255,255,0.55);
    margin-right: 8px;
    width: 14px;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 9px;
}

.footer-section a {
    color: rgba(255,255,255,0.7);
    font-size: 13px;
}

.footer-section a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 12px;
    color: rgba(255,255,255,0.55);
    letter-spacing: 1px;
}

/* 回到顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 42px;
    height: 42px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 99;
    border: none;
    font-size: 16px;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
}

/* 响应式 */
@media (max-width: 968px) {
    .content-wrap {
        grid-template-columns: 1fr;
    }

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

    .section-title h2::before,
    .section-title h2::after {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        border-top: 1px solid var(--border-light);
        box-shadow: 0 4px 10px rgba(0,0,0,0.06);
        padding: 10px 0;
    }

    .nav ul.open {
        display: flex;
    }

    .nav a {
        padding: 12px 20px;
    }

    .nav a.active::after,
    .nav a:hover::after {
        display: none;
    }

    .mobile-toggle {
        display: block;
    }

    .countdown-box {
        min-width: 76px;
        padding: 14px 8px;
    }

    .countdown-number {
        font-size: 28px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .section {
        padding: 50px 0;
    }

    .section-title h2 {
        font-size: 22px;
    }

    .content-main {
        padding: 25px 22px;
    }

    .top-bar-inner {
        font-size: 12px;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        padding-left: 55px;
    }

    .timeline-item::before {
        left: 14px;
    }

    .page-header h1 {
        font-size: 24px;
    }
}

/* ===== 重要日期 - 横向滚动栏 ===== */
.dates-marquee {
    overflow: hidden;
    background: var(--primary-dark);
    border-top: 2px solid var(--accent);
    border-bottom: 2px solid var(--accent);
    padding: 14px 0;
    margin-bottom: 40px;
    position: relative;
}
.dates-marquee::before,
.dates-marquee::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 60px;
    z-index: 2;
    pointer-events: none;
}
.dates-marquee::before { left: 0; background: linear-gradient(90deg, var(--primary-dark), transparent); }
.dates-marquee::after  { right: 0; background: linear-gradient(270deg, var(--primary-dark), transparent); }
.dates-marquee-track {
    display: flex;
    gap: 36px;
    width: max-content;
    animation: dates-scroll 36s linear infinite;
}
.dates-marquee:hover .dates-marquee-track { animation-play-state: paused; }
@keyframes dates-scroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}
.date-chip {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    color: #fff;
    font-family: "Noto Serif SC", serif;
    padding: 4px 18px;
    border-left: 3px solid var(--accent);
}
.date-chip .d {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 1px;
}
.date-chip .t {
    font-size: 14px;
    color: rgba(255,255,255,0.85);
    letter-spacing: 0.5px;
}

/* ===== 重要日期 - 右侧浮动悬浮窗 ===== */
.floating-dates {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    width: 240px;
    background: #fff;
    border: 1px solid var(--border);
    border-right: none;
    box-shadow: -4px 4px 16px rgba(0,0,0,0.08);
    transition: transform 0.3s ease;
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}
.floating-dates.collapsed {
    transform: translateY(-50%) translateX(calc(100% - 36px));
}
.floating-dates.collapsed .floating-dates-toggle i {
    transform: rotate(180deg);
}
.floating-dates-header {
    background: var(--primary-dark);
    color: #fff;
    padding: 10px 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
}
.floating-dates-header i.fa-calendar-days { margin-right: 6px; }
.floating-dates-toggle {
    background: transparent;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    padding: 4px 6px;
}
.floating-dates-toggle i { transition: transform 0.3s ease; }
.floating-dates-list {
    list-style: none;
    margin: 0;
    padding: 6px 0;
}
.floating-dates-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 9px 14px;
    border-bottom: 1px dashed var(--border-light);
    font-size: 13px;
}
.floating-dates-list li:last-child { border-bottom: none; }
.fd-date {
    color: var(--accent);
    font-weight: 700;
    font-family: "Noto Serif SC", serif;
    min-width: 72px;
    font-size: 13px;
    white-space: nowrap;
}
.fd-text {
    color: var(--text);
    flex: 1;
    font-size: 13px;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .floating-dates { width: 220px; }
    .fd-date { min-width: 64px; font-size: 12px; }
    .fd-text { font-size: 12px; }
    .date-chip .d { font-size: 18px; }
    .date-chip .t { font-size: 12px; }
}

/* ===== 论文在线投稿表单 ===== */
.paper-submit-box {
    max-width: 960px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--border);
    padding: 36px 40px;
}
.paper-form .form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-bottom: 16px;
}
.paper-form .form-group { display: flex; flex-direction: column; }
.paper-form .form-group.full { grid-column: 1 / -1; }
.paper-form label {
    font-size: 14px;
    color: var(--text);
    font-weight: 600;
    margin-bottom: 6px;
}
.paper-form .req { color: var(--accent); margin-left: 2px; }
.paper-form input[type="text"],
.paper-form input[type="email"],
.paper-form select,
.paper-form textarea {
    width: 100%;
    padding: 10px 12px;
    font-family: inherit;
    font-size: 14px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    transition: border-color 0.2s;
}
.paper-form input:focus,
.paper-form select:focus,
.paper-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 58, 110, 0.08);
}
.paper-form input[type="file"] {
    padding: 8px;
    background: var(--bg-light);
    border: 1px dashed var(--border);
}
.paper-form textarea { resize: vertical; }
.submit-msg {
    display: inline-block;
    margin-left: 14px;
    font-size: 14px;
    vertical-align: middle;
}
.submit-msg.loading { color: var(--text-light); }
.submit-msg.success { color: #1a7a3a; }
.submit-msg.error   { color: var(--accent); }

@media (max-width: 768px) {
    .paper-submit-box { padding: 24px 18px; }
    .paper-form .form-row { grid-template-columns: 1fr; }
}

/* ===== 品重烟台 (杂志式图文交错) ===== */
.campus-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto 80px;
}
.campus-block:last-child { margin-bottom: 20px; }
.campus-block-reverse { direction: rtl; }
.campus-block-reverse > * { direction: ltr; }

.campus-block-img {
    overflow: hidden;
    background: var(--bg-light);
    box-shadow: 0 10px 30px rgba(15, 37, 71, 0.12);
    aspect-ratio: 4 / 3;
}
.campus-block-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.campus-block:hover .campus-block-img img { transform: scale(1.04); }

.campus-block-text { padding: 6px 0; }
.campus-block-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--accent);
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent);
    margin-bottom: 18px;
}
.campus-block-title {
    font-family: "Noto Serif SC", serif;
    color: var(--primary-dark);
    font-size: 30px;
    font-weight: 700;
    line-height: 1.3;
    margin: 0 0 22px 0;
    letter-spacing: 1px;
}
.campus-block-lead {
    color: var(--accent);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px !important;
    padding-left: 12px;
    border-left: 3px solid var(--accent);
}
.campus-block-text p {
    color: var(--text);
    line-height: 2;
    font-size: 15px;
    margin: 0 0 14px 0;
    text-align: justify;
}

@media (max-width: 880px) {
    .campus-block {
        grid-template-columns: 1fr;
        gap: 24px;
        margin-bottom: 60px;
    }
    .campus-block-reverse { direction: ltr; }
    .campus-block-img { aspect-ratio: 16 / 10; }
    .campus-block-title { font-size: 24px; margin-bottom: 16px; }
    .campus-block-text p { font-size: 14px; line-height: 1.9; }
}

/* ===== 会议缴费页 ===== */
.payment-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin: 30px 0;
}
.payment-card {
    background: #fff;
    border: 1px solid var(--border);
    overflow: hidden;
}
.payment-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    color: #fff;
    font-weight: 600;
    font-size: 16px;
    letter-spacing: 1px;
}
.payment-card-header i { font-size: 22px; }
.payment-card-header.alipay { background: #1677ff; }
.payment-card-header.wechat { background: #07c160; }
.payment-card-header.bank   { background: var(--primary-dark); }
.payment-card-body {
    padding: 22px 20px;
    text-align: center;
}
.qrcode-placeholder {
    width: 200px;
    height: 200px;
    margin: 0 auto 14px;
    border: 2px dashed var(--border);
    background: var(--bg-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}
.qrcode-placeholder i { font-size: 60px; margin-bottom: 10px; opacity: 0.4; }
.qrcode-placeholder p { margin: 2px 0; font-size: 13px; }
.placeholder-tip { color: var(--text-muted); font-size: 12px; }
.payment-note { font-size: 13px; color: var(--text-light); margin-top: 8px; }
.bank-info {
    list-style: none;
    text-align: left;
    padding: 0;
    margin: 0;
}
.bank-info li {
    padding: 8px 0;
    border-bottom: 1px dashed var(--border-light);
    font-size: 14px;
    display: flex;
    gap: 8px;
}
.bank-info li:last-child { border-bottom: none; }
.bank-info span {
    color: var(--text-light);
    min-width: 60px;
}
.bank-info strong {
    color: var(--text);
    word-break: break-all;
}
.faq-item {
    border: 1px solid var(--border-light);
    margin-bottom: 10px;
    background: #fff;
}
.faq-item summary {
    cursor: pointer;
    padding: 12px 18px;
    font-weight: 600;
    color: var(--primary-dark);
    font-size: 14px;
    list-style: none;
    position: relative;
}
.faq-item summary::after {
    content: "+";
    position: absolute;
    right: 18px;
    top: 12px;
    font-size: 18px;
    color: var(--accent);
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p {
    padding: 0 18px 14px;
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.8;
}

/* ===== 论文征稿页 - 查询审稿状态入口 ===== */
.status-query-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    background: linear-gradient(135deg, #1a3a6e, #0f2547);
    color: #fff;
    border-radius: 6px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 14px;
}
.status-query-banner strong {
    font-size: 15px;
    display: block;
    margin-bottom: 4px;
    font-family: "Noto Serif SC", serif;
}
.status-query-banner p {
    font-size: 13px;
    color: rgba(255,255,255,.8);
    margin: 0;
}
.status-query-btn {
    background: var(--accent);
    color: #fff;
    padding: 9px 20px;
    border-radius: 4px;
    font-size: 14px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: background .2s;
}
.status-query-btn:hover { background: var(--accent-dark); color: #fff; }

/* ===== 报名查询页:三个后续动作卡片 ===== */
.query-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin: 30px 0 10px;
}
.query-action {
    background: #fff;
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    padding: 22px 20px;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
    transition: box-shadow .2s, transform .15s, border-color .2s;
    display: block;
}
.query-action:hover {
    box-shadow: 0 6px 24px rgba(0,0,0,0.08);
    transform: translateY(-2px);
    border-left-color: var(--primary);
}
.query-action-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(139,0,0,0.08);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: 12px;
}
.query-action:hover .query-action-icon {
    background: rgba(26,58,110,0.1);
    color: var(--primary);
}
.query-action-title {
    font-family: "Noto Serif SC", serif;
    color: var(--primary-dark);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}
.query-action-desc {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.5;
}

@media (max-width: 720px) {
    .query-actions { grid-template-columns: 1fr; gap: 12px; }
}

/* ===== 参会注册流程页 ===== */
.flow-intro {
    max-width: 880px;
    margin: 30px auto 24px;
    text-align: center;
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.8;
}

/* 顶部步骤进度条 */
.flow-stepper {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 720px;
    margin: 0 auto 40px;
    padding: 0 12px;
}
.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.flow-step-circle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--border);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    font-family: "Noto Serif SC", serif;
    position: relative;
    transition: all .25s ease;
}
.flow-step-num { transition: opacity .2s; }
.flow-step-check {
    position: absolute;
    font-size: 22px;
    opacity: 0;
    transition: opacity .2s;
}
.flow-step.done .flow-step-circle {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.flow-step.done .flow-step-num { opacity: 0; }
.flow-step.done .flow-step-check { opacity: 1; }
.flow-step-label {
    font-size: 14px;
    color: var(--text);
    font-weight: 600;
    letter-spacing: 1px;
}
.flow-step.done .flow-step-label { color: var(--primary); }
.flow-step-line {
    flex: 1;
    height: 2px;
    background: var(--border);
    margin: 0 -2px;
    margin-bottom: 28px;
    min-width: 40px;
}

/* 步骤卡片 */
.flow-cards {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 920px;
    margin: 0 auto;
}
.flow-card {
    background: #fff;
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    padding: 28px 32px;
    transition: box-shadow .2s, border-color .2s;
}
.flow-card:hover { box-shadow: 0 6px 24px rgba(0,0,0,0.06); }
.flow-card.done {
    border-left-color: var(--primary);
    background: #fcfdfe;
}
.flow-card-head {
    border-bottom: 1px dashed var(--border-light);
    padding-bottom: 16px;
    margin-bottom: 16px;
}
.flow-card-tag {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    padding: 4px 10px;
    margin-bottom: 10px;
}
.flow-card.done .flow-card-tag { background: var(--primary); }
.flow-card-head h3 {
    margin: 0 0 8px;
    color: var(--primary-dark);
    font-family: "Noto Serif SC", serif;
    font-size: 22px;
    letter-spacing: 1px;
}
.flow-card-deadline {
    font-size: 14px;
    color: var(--text-light);
}
.flow-card-deadline i { color: var(--accent); margin-right: 4px; }
.flow-card-deadline strong { color: var(--accent); }
.flow-card-body p {
    color: var(--text);
    line-height: 1.8;
    margin: 0 0 12px;
}
.flow-card-points {
    margin: 0;
    padding-left: 22px;
    color: var(--text-light);
    line-height: 2;
    font-size: 14px;
}
.flow-card-points li::marker { color: var(--accent); }
.flow-card-foot {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px dashed var(--border-light);
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}
.flow-card-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    padding: 10px 22px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 1px;
    transition: background .2s;
}
.flow-card-btn:hover { background: var(--primary-dark); color: #fff; }
.flow-card-btn-ghost {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}
.flow-card-btn-ghost:hover { background: var(--primary); color: #fff; }
.flow-card-mark {
    margin-left: auto;
    background: transparent;
    border: 1px dashed var(--border);
    color: var(--text-light);
    padding: 8px 16px;
    font-size: 13px;
    cursor: pointer;
    transition: all .2s;
}
.flow-card-mark:hover { border-color: var(--primary); color: var(--primary); }
.flow-card.done .flow-card-mark {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.flow-card.done .flow-card-mark:hover { background: var(--primary-dark); }

.flow-tip {
    max-width: 920px;
    margin: 30px auto 0;
    padding: 14px 18px;
    background: var(--bg-light);
    border-left: 3px solid var(--border);
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.7;
}
.flow-tip i { color: var(--text-light); margin-right: 6px; }

@media (max-width: 640px) {
    .flow-stepper { max-width: 100%; gap: 4px; }
    .flow-step-circle { width: 44px; height: 44px; font-size: 16px; }
    .flow-step-label { font-size: 12px; }
    .flow-step-line { min-width: 16px; margin-bottom: 22px; }
    .flow-card { padding: 22px 18px; }
    .flow-card-head h3 { font-size: 18px; }
    .flow-card-mark { margin-left: 0; width: 100%; text-align: center; }
}

/* ===== 全站悬浮"参会注册"FAB ===== */
.floating-register {
    position: fixed;
    right: 24px;
    bottom: 90px;
    z-index: 998;
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}
.floating-register-card {
    width: 280px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: 0 8px 28px rgba(0,0,0,0.12);
    overflow: hidden;
    transform-origin: bottom right;
    transition: transform .25s ease, opacity .25s ease;
}
.floating-register.collapsed .floating-register-card {
    opacity: 0;
    transform: scale(0.6);
    pointer-events: none;
}
.floating-register-head {
    background: var(--primary-dark);
    color: #fff;
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
}
.floating-register-head .fr-title i { margin-right: 6px; color: #fff; }
.floating-register-close {
    background: transparent;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    padding: 4px;
}
.floating-register-steps {
    list-style: none;
    margin: 0;
    padding: 10px 0;
}
.floating-register-steps li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 9px 16px;
    border-bottom: 1px dashed var(--border-light);
    font-size: 13px;
    color: var(--text);
}
.floating-register-steps li:last-child { border-bottom: none; }
.fr-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
    font-family: "Noto Serif SC", serif;
}
.fr-step-text { flex: 1; }
.fr-step-text small {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}
.floating-register-foot {
    padding: 12px 16px;
    background: var(--bg-light);
    border-top: 1px solid var(--border-light);
}
.floating-register-cta {
    display: block;
    width: 100%;
    background: var(--accent);
    color: #fff;
    text-align: center;
    padding: 10px 0;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 1px;
    transition: background .2s;
}
.floating-register-cta:hover { background: var(--accent-dark); color: #fff; }
.floating-register-fab {
    position: absolute;
    right: 0;
    bottom: -64px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    border: none;
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(139,0,0,0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: transform .2s, background .2s;
}
.floating-register-fab:hover {
    background: var(--accent-dark);
    transform: scale(1.06);
}
.floating-register-fab .fa-times { display: none; }
.floating-register:not(.collapsed) .floating-register-fab .fa-pen-to-square { display: none; }
.floating-register:not(.collapsed) .floating-register-fab .fa-times { display: inline-block; }

@media (max-width: 640px) {
    .floating-register { right: 12px; bottom: 80px; }
    .floating-register-card { width: 240px; }
    .floating-register-fab { width: 48px; height: 48px; font-size: 18px; bottom: -56px; }
}

/* ===== 参会注册向导(全屏弹窗) ===== */
body.rw-locked { overflow: hidden; }

.rw-overlay {
    position: fixed;
    inset: 0;
    z-index: 9000;
    background: rgba(15, 25, 45, 0.55);
    backdrop-filter: blur(2px);
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding: 5vh 16px;
    overflow-y: auto;
}
.rw-overlay.rw-open { display: flex; }

.rw-modal {
    background: #fff;
    width: 100%;
    max-width: 960px;
    min-height: 480px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0,0,0,0.35);
    border-top: 4px solid var(--accent);
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    animation: rwModalIn .25s ease-out;
}
@keyframes rwModalIn {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to   { opacity: 1; transform: translateY(0)    scale(1); }
}

.rw-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 28px;
    border-bottom: 1px solid var(--border-light);
}
.rw-header h2 {
    margin: 0;
    color: var(--primary-dark);
    font-family: "Noto Serif SC", serif;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
}
.rw-header h2 i { color: var(--accent); margin-right: 8px; }
.rw-close {
    background: transparent;
    border: none;
    color: var(--text-light);
    font-size: 22px;
    cursor: pointer;
    padding: 4px 10px;
    transition: color .15s;
}
.rw-close:hover { color: var(--accent); }

/* ----- Stepper ----- */
.rw-stepper {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 22px 28px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-light);
}
.rw-step-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    user-select: none;
}
.rw-step-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--border);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    position: relative;
    transition: all .25s ease;
}
.rw-step-check { position: absolute; opacity: 0; transition: opacity .2s; }
.rw-step-node.rw-step-current .rw-step-circle {
    border-color: var(--accent);
    color: var(--accent);
    background: #fff8f8;
    box-shadow: 0 0 0 4px rgba(139,0,0,0.1);
}
.rw-step-node.rw-step-done .rw-step-circle {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.rw-step-node.rw-step-done .rw-step-icon { opacity: 0; }
.rw-step-node.rw-step-done .rw-step-check { opacity: 1; }
.rw-step-label {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 600;
    letter-spacing: 0.5px;
}
.rw-step-node.rw-step-current .rw-step-label { color: var(--accent); }
.rw-step-node.rw-step-done .rw-step-label    { color: var(--primary); }
.rw-step-node.rw-step-clickable { cursor: pointer; }
.rw-step-node:not(.rw-step-clickable) { cursor: not-allowed; }
.rw-step-line {
    flex: 0 1 80px;
    height: 2px;
    background: var(--border);
    margin: 0 8px;
    margin-bottom: 24px;
    transition: background .25s;
}
.rw-step-line-done { background: var(--primary); }

/* ----- Body ----- */
.rw-body {
    flex: 1;
    padding: 28px 32px;
    overflow-y: auto;
}
.rw-step { display: none; }
.rw-step.rw-step-active { display: block; }
.rw-step-title {
    margin: 0 0 8px;
    color: var(--primary-dark);
    font-family: "Noto Serif SC", serif;
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 1px;
}
.rw-step-title .rw-step-tag {
    display: inline-block;
    background: var(--bg-light);
    color: var(--text-light);
    font-size: 12px;
    font-weight: 500;
    padding: 2px 8px;
    margin-left: 8px;
    border: 1px solid var(--border);
    border-radius: 2px;
    vertical-align: middle;
}
.rw-step-desc {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.8;
    margin: 0 0 20px;
    padding-bottom: 14px;
    border-bottom: 1px dashed var(--border-light);
}

/* ----- 表单 ----- */
.rw-form { display: block; }
.rw-form.rw-form-hidden { display: none; }
.rw-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 14px;
}
.rw-field { display: flex; flex-direction: column; }
.rw-field-full { grid-column: 1 / -1; margin-bottom: 14px; }
.rw-field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
    letter-spacing: 0.5px;
}
.rw-field label em { color: var(--accent); font-style: normal; margin-left: 2px; }
.rw-field label small { color: var(--text-muted); font-weight: 400; margin-left: 4px; }
.rw-field input[type="text"],
.rw-field input[type="tel"],
.rw-field input[type="email"],
.rw-field select,
.rw-field textarea,
.rw-field input[type="file"] {
    width: 100%;
    padding: 0 12px;
    height: 40px;
    line-height: 38px;
    font-family: inherit;
    font-size: 14px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    outline: none;
    transition: border-color .15s, box-shadow .15s;
    box-sizing: border-box;
}
.rw-field textarea {
    line-height: 1.6;
    padding: 9px 12px;
    height: auto;
    min-height: 80px;
    resize: vertical;
}
.rw-field input[type="file"] {
    line-height: normal;
    padding: 8px 12px;
}
/* 自定义 Select 组件(完全替代原生下拉,含展开面板) */
.rw-select {
    position: relative;
    width: 100%;
}
.rw-select select {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    pointer-events: none;
    z-index: -1;
}
.rw-select-trigger {
    width: 100%;
    height: 40px;
    padding: 0 36px 0 12px;
    font-family: inherit;
    font-size: 14px;
    color: var(--text);
    background: #fff;
    border: 1px solid var(--border);
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-sizing: border-box;
    transition: border-color .15s, box-shadow .15s;
    position: relative;
}
.rw-select-trigger:hover { border-color: var(--primary-light); }
.rw-select.rw-select-open .rw-select-trigger {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,58,110,0.08);
}
.rw-select-text {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: left;
}
.rw-select-text.rw-select-placeholder { color: var(--text-muted); }
.rw-select-caret {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    color: var(--text-light);
    transition: transform .2s;
    pointer-events: none;
}
.rw-select.rw-select-open .rw-select-caret {
    transform: translateY(-50%) rotate(180deg);
    color: var(--primary);
}
.rw-select-panel {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 4px);
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: 0 6px 24px rgba(0,0,0,0.10);
    max-height: 260px;
    overflow-y: auto;
    z-index: 100;
    display: none;
    padding: 4px 0;
}
.rw-select.rw-select-open .rw-select-panel { display: block; }
.rw-select-option {
    padding: 9px 14px;
    font-size: 14px;
    color: var(--text);
    cursor: pointer;
    line-height: 1.4;
    transition: background .12s, color .12s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.rw-select-option:hover { background: var(--bg-light); color: var(--primary-dark); }
.rw-select-option-active {
    background: rgba(26,58,110,0.06);
    color: var(--primary);
    font-weight: 600;
}
.rw-select-option-active::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    float: right;
    color: var(--primary);
    font-size: 12px;
    margin-left: 8px;
}
.rw-select-option-placeholder { color: var(--text-muted); }
.rw-select-option-disabled { color: var(--text-muted); cursor: not-allowed; opacity: 0.5; }

.rw-field input:focus,
.rw-field select:focus,
.rw-field textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,58,110,0.08);
}

.rw-inline { display: flex; gap: 8px; }
.rw-inline input { flex: 1; }
.rw-send-code {
    flex: 0 0 auto;
    white-space: nowrap;
    padding: 9px 14px;
    font-size: 13px;
}
.rw-code-hint {
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-muted);
}
.rw-code-hint-info  { color: var(--text-light); }
.rw-code-hint-ok    { color: #2e7d32; }
.rw-code-hint-error { color: var(--accent); }

.rw-radio-group { display: flex; flex-wrap: wrap; gap: 18px; padding: 8px 0; }
.rw-radio {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 400;
    font-size: 14px;
    color: var(--text);
    cursor: pointer;
}
.rw-radio input { margin: 0; }

.rw-step2-toggle {
    display: flex;
    gap: 24px;
    padding: 14px 18px;
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    margin-bottom: 18px;
}

.rw-tip {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.7;
    margin: 10px 0 0;
    padding: 10px 14px;
    background: var(--bg-light);
    border-left: 3px solid var(--accent);
}
.rw-tip i { color: var(--accent); margin-right: 4px; }

/* 温馨提示卡片(step1 顶部) */
.rw-notice {
    background: #fff8f6;
    border: 1px solid #f3d9d4;
    border-left: 4px solid var(--accent);
    padding: 14px 18px 14px 22px;
    margin: 0 0 22px 0;
}
.rw-notice-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-dark);
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}
.rw-notice-title i { margin-right: 6px; }
.rw-notice-list {
    margin: 0;
    padding-left: 22px;
    color: var(--text);
    font-size: 13px;
    line-height: 1.9;
}
.rw-notice-list li::marker { color: var(--accent); font-weight: 700; }
.rw-notice-list strong { color: var(--accent); }

/* ----- Step 3 缴费 ----- */
.rw-pay-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}
.rw-pay-card {
    border: 1px solid var(--border);
    padding: 18px 16px;
    background: #fff;
    text-align: center;
}
.rw-pay-card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 12px;
}
.rw-pay-card-title i { margin-right: 6px; color: var(--accent); }
.rw-pay-qr {
    width: 140px;
    height: 140px;
    object-fit: contain;
    margin: 0 auto 10px;
    display: block;
    background: var(--bg-light);
}
.rw-pay-desc {
    font-size: 12px;
    color: var(--text-muted);
    margin: 0;
}
.rw-pay-bank {
    text-align: left;
    font-size: 13px;
    color: var(--text);
    line-height: 1.9;
}
.rw-pay-bank p { margin: 0; }
.rw-pay-policy {
    background: #fff8e6;
    border-left: 3px solid #d4a017;
    padding: 12px 16px;
    margin-bottom: 18px;
    font-size: 13px;
    color: var(--text);
}
.rw-pay-policy i { color: #d4a017; margin-right: 4px; }
.rw-mini-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-dark);
    margin: 18px 0 12px;
    letter-spacing: 0.5px;
    padding-left: 8px;
    border-left: 3px solid var(--accent);
}
.rw-paid-mark {
    margin-top: 16px;
    padding: 12px 14px;
    background: var(--bg-light);
    border: 1px dashed var(--border);
}

/* ----- 完成页 ----- */
.rw-done {
    text-align: center;
    padding: 30px 20px;
    max-width: 560px;
    margin: 0 auto;
}
.rw-done-icon { font-size: 64px; color: #2e7d32; margin-bottom: 14px; }
.rw-done h3 {
    margin: 0 0 8px;
    color: var(--primary-dark);
    font-family: "Noto Serif SC", serif;
    font-size: 22px;
}
.rw-done p { color: var(--text-light); margin: 0 0 12px; }
.rw-done-card {
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    padding: 16px 20px;
    margin: 18px 0;
    text-align: left;
}
.rw-done-row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 14px;
    border-bottom: 1px dashed var(--border-light);
}
.rw-done-row:last-child { border-bottom: none; }
.rw-done-row strong { color: var(--accent); font-family: "Noto Serif SC", serif; letter-spacing: 1px; }
.rw-done-tip { font-size: 13px; color: var(--text-muted); margin-top: 10px; }
.rw-done-actions { margin-top: 24px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ----- Footer ----- */
.rw-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 28px;
    border-top: 1px solid var(--border-light);
    background: var(--bg-light);
}
.rw-foot-tip {
    flex: 1;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
}

.rw-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 22px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    cursor: pointer;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text);
    text-decoration: none;
    transition: all .15s;
}
.rw-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.rw-btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.rw-btn-primary:hover:not(:disabled) { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.rw-btn-ghost {
    color: var(--text-light);
    border-color: var(--border);
}
.rw-btn-ghost:hover:not(:disabled) { color: var(--primary); border-color: var(--primary); }
.rw-btn-outline {
    color: var(--primary);
    border-color: var(--primary);
    background: #fff;
}
.rw-btn-outline:hover:not(:disabled) { background: var(--primary); color: #fff; }

@media (max-width: 768px) {
    .rw-overlay { padding: 0; }
    .rw-modal { max-width: 100%; min-height: 100vh; max-height: 100vh; border-top: none; }
    .rw-stepper { padding: 16px 14px; }
    .rw-step-line { flex: 0 1 40px; margin: 0 4px 24px; }
    .rw-step-circle { width: 38px; height: 38px; font-size: 14px; }
    .rw-step-label { font-size: 12px; }
    .rw-body { padding: 20px 16px; }
    .rw-row { grid-template-columns: 1fr; gap: 12px; }
    .rw-pay-grid { grid-template-columns: 1fr; }
    .rw-footer { padding: 14px 16px; flex-wrap: wrap; }
    .rw-foot-tip { order: 3; flex-basis: 100%; margin-top: 8px; }
    .rw-btn { padding: 9px 16px; }
}