/* =============================================================
   前端（参展商端）样式
   ============================================================= */
:root {
    --if-primary: #1a6dff;
    --if-primary-dark: #0f4fbf;
    --if-primary-light: #eaf1ff;
    --if-accent: #25c1a0;
    --if-text: #22303f;
    --if-text-muted: #6b7a8d;
    --if-border: #e6ebf2;
    --if-bg: #f4f7fc;
    --if-radius: 14px;
    --if-shadow: 0 8px 30px rgba(24, 52, 108, .08);
    --if-shadow-hover: 0 14px 40px rgba(24, 52, 108, .16);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body { margin: 0; padding: 0; }

body.ief-body {
    background: var(--if-bg);
    color: var(--if-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--if-primary); text-decoration: none; }

img { max-width: 100%; border: 0; }

/* ------------------------------------------------------------- 顶部导航 */
.ief-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255, 255, 255, .94);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--if-border);
    box-shadow: 0 2px 12px rgba(24, 52, 108, .04);
}

.ief-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 18px;
    display: flex;
    align-items: center;
    gap: 18px;
}

.ief-brand { display: flex; align-items: center; gap: 10px; min-width: 0; }

.ief-brand-logo {
    width: 40px; height: 40px; border-radius: 12px; flex: 0 0 40px;
    background: linear-gradient(135deg, var(--if-primary), var(--if-accent));
    color: #fff; font-weight: 800; font-size: 15px;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 6px 16px rgba(26, 109, 255, .28);
    overflow: hidden;
}

.ief-brand-logo img { width: 100%; height: 100%; object-fit: cover; }

.ief-brand-text { min-width: 0; }

.ief-brand-title {
    font-size: 16px; font-weight: 700; letter-spacing: .2px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.ief-brand-sub { font-size: 12px; color: var(--if-text-muted); }

.ief-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }

.ief-nav a {
    padding: 8px 14px; border-radius: 10px; color: var(--if-text-muted);
    font-size: 14px; font-weight: 600; transition: all .2s; white-space: nowrap;
}

.ief-nav a:hover { background: var(--if-primary-light); color: var(--if-primary); }

.ief-nav a.active {
    background: linear-gradient(135deg, var(--if-primary), #3d8bff);
    color: #fff; box-shadow: 0 6px 16px rgba(26, 109, 255, .26);
}

.ief-user { display: flex; align-items: center; gap: 10px; }

.ief-user-name {
    font-size: 13px; color: var(--if-text-muted);
    max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.ief-btn-logout {
    padding: 7px 14px; border-radius: 9px; font-size: 13px; font-weight: 600;
    border: 1px solid var(--if-border); color: var(--if-text-muted); background: #fff;
}

.ief-btn-logout:hover { border-color: #f3c2c2; color: #e04b4b; background: #fff6f6; }

.ief-nav-toggle {
    display: none; width: 40px; height: 40px; border: 1px solid var(--if-border);
    border-radius: 10px; background: #fff; cursor: pointer; margin-left: auto;
    align-items: center; justify-content: center;
}

.ief-nav-toggle span { display: block; width: 18px; height: 2px; background: var(--if-text); position: relative; }
.ief-nav-toggle span::before, .ief-nav-toggle span::after {
    content: ''; position: absolute; left: 0; width: 18px; height: 2px; background: var(--if-text);
}
.ief-nav-toggle span::before { top: -6px; }
.ief-nav-toggle span::after { top: 6px; }

/* ------------------------------------------------------------- 页面容器 */
.ief-container { max-width: 1200px; margin: 0 auto; padding: 22px 18px 50px; }

.ief-page-head { margin-bottom: 18px; }

.ief-page-title { font-size: 22px; font-weight: 700; margin: 0 0 6px; }

.ief-page-desc { color: var(--if-text-muted); font-size: 13px; margin: 0; }

/* ------------------------------------------------------------- 搜索栏 */
.ief-search {
    display: flex; gap: 10px; margin: 16px 0; flex-wrap: wrap;
    background: #fff; padding: 12px; border-radius: var(--if-radius); box-shadow: var(--if-shadow);
}

.ief-search input {
    flex: 1; min-width: 200px; height: 42px; border: 1px solid var(--if-border);
    border-radius: 10px; padding: 0 14px; font-size: 14px; outline: none; transition: .2s;
}

.ief-search input:focus { border-color: var(--if-primary); box-shadow: 0 0 0 3px rgba(26, 109, 255, .12); }

.ief-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    height: 42px; padding: 0 22px; border: none; border-radius: 10px; cursor: pointer;
    background: linear-gradient(135deg, var(--if-primary), #3d8bff); color: #fff;
    font-size: 14px; font-weight: 600; transition: .2s;
    box-shadow: 0 6px 18px rgba(26, 109, 255, .24);
}

.ief-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(26, 109, 255, .3); }
.ief-btn.ghost { background: #fff; color: var(--if-primary); border: 1px solid #cddcff; box-shadow: none; }
.ief-btn.block { width: 100%; }

/* ------------------------------------------------------------- 分类标签 */
.ief-cats { display: flex; gap: 10px; flex-wrap: wrap; margin: 16px 0 20px; }

.ief-cat {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 9px 18px; border-radius: 999px; background: #fff;
    border: 1px solid var(--if-border); color: var(--if-text-muted);
    font-size: 14px; font-weight: 600; cursor: pointer; transition: .2s;
    box-shadow: 0 2px 8px rgba(24, 52, 108, .04);
}

.ief-cat:hover { border-color: #bcd2ff; color: var(--if-primary); }

.ief-cat.active {
    background: linear-gradient(135deg, var(--if-primary), #3d8bff);
    border-color: transparent; color: #fff;
    box-shadow: 0 8px 20px rgba(26, 109, 255, .28);
}

.ief-cat-count {
    display: inline-block; padding: 1px 8px; border-radius: 999px;
    background: rgba(26, 109, 255, .1); color: var(--if-primary); font-size: 12px;
}

.ief-cat.active .ief-cat-count { background: rgba(255, 255, 255, .28); color: #fff; }

/* ------------------------------------------------------------- 卡片网格 */
.ief-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

.ief-card {
    background: #fff; border-radius: var(--if-radius); overflow: hidden;
    box-shadow: var(--if-shadow); transition: .25s; display: flex; flex-direction: column;
}

.ief-card:hover { transform: translateY(-4px); box-shadow: var(--if-shadow-hover); }

.ief-card-media {
    position: relative; width: 100%; padding-top: 56%; background: #f0f4fa; overflow: hidden;
}

.ief-card-media img {
    position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
    transition: transform .4s;
}

.ief-card:hover .ief-card-media img { transform: scale(1.05); }

.ief-card-media.contain img { object-fit: contain; padding: 12px; background: #fff; }

.ief-card-placeholder {
    position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #eaf1ff, #e9f7f3); color: var(--if-primary);
    font-size: 13px; font-weight: 600; letter-spacing: 1px;
}

.ief-card-body { padding: 15px 16px 17px; display: flex; flex-direction: column; flex: 1; }

.ief-card-cat {
    align-self: flex-start; font-size: 11px; font-weight: 700;
    padding: 3px 10px; border-radius: 999px; margin-bottom: 9px;
    background: var(--if-primary-light); color: var(--if-primary);
}

.ief-card-title {
    font-size: 16px; font-weight: 700; line-height: 1.45; margin: 0 0 8px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.ief-card-title a { color: var(--if-text); }
.ief-card-title a:hover { color: var(--if-primary); }

.ief-card-text {
    font-size: 13px; color: var(--if-text-muted); margin: 0 0 12px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.ief-card-meta {
    margin-top: auto; padding-top: 12px; border-top: 1px dashed var(--if-border);
    display: flex; flex-direction: column; gap: 5px; font-size: 12.5px; color: var(--if-text-muted);
}

.ief-card-meta span { display: flex; align-items: center; gap: 6px; }
.ief-card-meta b { color: var(--if-text); font-weight: 600; }

.ief-empty {
    grid-column: 1 / -1; text-align: center; padding: 70px 20px; color: var(--if-text-muted);
    background: #fff; border-radius: var(--if-radius); box-shadow: var(--if-shadow);
}

/* ------------------------------------------------------------- 分页 */
.ief-pagination { display: flex; justify-content: center; align-items: center; gap: 6px; margin-top: 28px; flex-wrap: wrap; }
.ief-pagination a, .ief-pagination span {
    min-width: 38px; height: 38px; padding: 0 12px; border-radius: 10px; background: #fff;
    border: 1px solid var(--if-border); color: var(--if-text-muted);
    display: inline-flex; align-items: center; justify-content: center; font-size: 14px;
}
.ief-pagination a:hover { border-color: var(--if-primary); color: var(--if-primary); }
.ief-pagination .active { background: var(--if-primary); border-color: var(--if-primary); color: #fff; }
.ief-pagination .disabled { opacity: .45; }
.ief-pagination .dots { border: none; background: transparent; }

/* ------------------------------------------------------------- 详情页 */
.ief-detail {
    background: #fff; border-radius: var(--if-radius); box-shadow: var(--if-shadow);
    padding: 30px 34px; max-width: 900px; margin: 0 auto;
}

.ief-detail-head { border-bottom: 1px solid var(--if-border); padding-bottom: 18px; margin-bottom: 22px; }
.ief-detail-title { font-size: 24px; font-weight: 700; margin: 0 0 10px; line-height: 1.4; }
.ief-detail-meta { display: flex; gap: 18px; flex-wrap: wrap; font-size: 13px; color: var(--if-text-muted); }

.ief-back { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; margin-bottom: 14px; color: var(--if-text-muted); }
.ief-back:hover { color: var(--if-primary); }

.ief-info-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 22px;
}

.ief-info-item {
    background: #f8fafd; border: 1px solid var(--if-border); border-radius: 12px; padding: 12px 14px;
}

.ief-info-item .label { font-size: 12px; color: var(--if-text-muted); margin-bottom: 3px; }
.ief-info-item .value { font-size: 14px; font-weight: 600; word-break: break-all; }

.ief-qrcode-box { text-align: center; margin: 24px 0; }
.ief-qrcode-box img {
    max-width: 240px; width: 100%; border-radius: 12px; border: 1px solid var(--if-border);
    padding: 10px; background: #fff;
}
.ief-qrcode-box .caption { font-size: 13px; color: var(--if-text-muted); margin-top: 10px; }

.ief-article { font-size: 15.5px; line-height: 1.9; color: #35424f; word-break: break-word; }
.ief-article img { height: auto; border-radius: 10px; }
.ief-article p { margin: 0 0 14px; }
.ief-article h1, .ief-article h2, .ief-article h3 { margin: 22px 0 12px; line-height: 1.4; }
.ief-article ul, .ief-article ol { padding-left: 22px; }
.ief-article table { width: 100%; border-collapse: collapse; margin: 14px 0; }
.ief-article th, .ief-article td { border: 1px solid var(--if-border); padding: 8px 10px; }

/* ------------------------------------------------------------- 页脚 */
.ief-footer {
    text-align: center; color: #9aa6b6; font-size: 12.5px; padding: 24px 18px 32px; line-height: 2;
}
.ief-footer a { color: #9aa6b6; }

/* ------------------------------------------------------------- 登录页 */
.ilogin-wrap { min-height: 100vh; display: flex; flex-direction: column; background: #eef3fc; }

.icarousel { position: relative; width: 100%; overflow: hidden; background: linear-gradient(135deg, #0d3f9e, #1a6dff 45%, #1fb99a); }

.icarousel-track { display: flex; transition: transform .6s cubic-bezier(.4, 0, .2, 1); }

.icarousel-slide { min-width: 100%; position: relative; }

.icarousel-slide img { width: 100%; height: 100%; object-fit: cover; display: block; }

.icarousel-caption {
    position: absolute; left: 0; right: 0; bottom: 0; padding: 40px 22px 22px;
    background: linear-gradient(to top, rgba(6, 20, 48, .76), rgba(6, 20, 48, 0));
    color: #fff;
}

.icarousel-caption h3 { margin: 0 0 4px; font-size: 18px; font-weight: 700; }
.icarousel-caption p { margin: 0; font-size: 13px; opacity: .88; }

.icarousel-default {
    padding: 46px 22px 40px; color: #fff; text-align: center;
    background: radial-gradient(circle at 15% 20%, rgba(255, 255, 255, .22), transparent 45%),
                radial-gradient(circle at 85% 80%, rgba(37, 193, 160, .35), transparent 50%);
}

.icarousel-default .kicker { font-size: 12px; letter-spacing: 3px; text-transform: uppercase; opacity: .8; }
.icarousel-default h1 { margin: 10px 0 8px; font-size: 26px; font-weight: 800; letter-spacing: .5px; }
.icarousel-default p { margin: 0; font-size: 14px; opacity: .9; }

.icarousel-dots { position: absolute; right: 18px; bottom: 14px; display: flex; gap: 7px; z-index: 3; }

.icarousel-dots i {
    width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, .45);
    cursor: pointer; transition: .25s;
}

.icarousel-dots i.on { width: 22px; border-radius: 999px; background: #fff; }

.icarousel-arrow {
    position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
    width: 38px; height: 38px; border-radius: 50%; border: none; cursor: pointer;
    background: rgba(255, 255, 255, .22); color: #fff; font-size: 18px; line-height: 1;
    display: flex; align-items: center; justify-content: center; transition: .2s;
}

.icarousel-arrow:hover { background: rgba(255, 255, 255, .36); }
.icarousel-arrow.prev { left: 14px; }
.icarousel-arrow.next { right: 14px; }

.ilogin-main { flex: 1; display: flex; align-items: center; justify-content: center; padding: 30px 18px 40px; }

.ilogin-card {
    width: 100%; max-width: 430px; background: #fff; border-radius: 18px;
    box-shadow: 0 18px 50px rgba(20, 46, 96, .14); padding: 32px 30px 28px;
}

.ilogin-card h2 { margin: 0 0 6px; font-size: 20px; font-weight: 700; }
.ilogin-card .tip { color: var(--if-text-muted); font-size: 13px; margin: 0 0 22px; line-height: 1.7; }

.ifield { margin-bottom: 15px; position: relative; }

.ifield label { display: block; font-size: 13px; font-weight: 600; color: #46556a; margin-bottom: 6px; }

.ifield input {
    width: 100%; height: 46px; border: 1px solid var(--if-border); border-radius: 11px;
    padding: 0 14px; font-size: 14.5px; outline: none; background: #fbfcfe; transition: .2s;
}

.ifield input:focus { border-color: var(--if-primary); background: #fff; box-shadow: 0 0 0 3px rgba(26, 109, 255, .13); }

.ifield-row { display: flex; gap: 10px; }
.ifield-row input { flex: 1; }

.ifield-row .ief-btn { flex: 0 0 auto; padding: 0 16px; font-size: 13.5px; height: 46px; }

.ifield-row .ief-btn[disabled] { opacity: .6; cursor: not-allowed; box-shadow: none; transform: none; }

.ialert {
    padding: 11px 14px; border-radius: 10px; font-size: 13px; margin-bottom: 16px; line-height: 1.6;
    background: #fdecec; color: #c0392b; border: 1px solid #f7d4d4;
}

.ialert.ok { background: #e8f8f1; color: #12a06a; border-color: #cdeee0; }

.ilogin-foot { text-align: center; font-size: 12px; color: #93a0b2; margin-top: 16px; }

/* ------------------------------------------------------------- 响应式 */
@media (max-width: 980px) {
    .ief-grid { grid-template-columns: repeat(2, 1fr); }
    .ief-info-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
    body.ief-body { font-size: 14.5px; }
    .ief-header-inner { padding: 9px 14px; gap: 10px; flex-wrap: wrap; }
    .ief-nav-toggle { display: flex; }
    .ief-nav {
        display: none; width: 100%; flex-direction: column; align-items: stretch;
        gap: 4px; margin: 8px 0 2px;
    }
    .ief-nav.open { display: flex; }
    .ief-nav a { text-align: center; }
    .ief-user { width: 100%; justify-content: space-between; margin-top: 2px; }
    .ief-container { padding: 16px 14px 40px; }
    .ief-grid { grid-template-columns: 1fr; gap: 14px; }
    .ief-page-title { font-size: 19px; }
    .ief-detail { padding: 20px 16px; }
    .ief-detail-title { font-size: 19px; }
    .ief-carousel-slide { height: auto !important; }
    .icarousel-default h1 { font-size: 20px; }
    .ilogin-card { padding: 24px 18px 22px; border-radius: 16px; }
    .icarousel-arrow { display: none; }
}

/* ------------------------------------------------------------- 防复制 */
.ief-body, .ilogin-wrap {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

input, textarea {
    -webkit-user-select: text;
    user-select: text;
}

@media print { body { display: none !important; } }