/* ===== 基础变量 ===== */
:root {
  --primary: #0e3a82;
  --primary-dark: #0a2c64;
  --primary-light: #1d4ea6;
  --accent: #2bb7e8;
  --accent-2: #5cc4ff;
  --gold: #f6b73c;
  --text: #1b2540;
  --text-2: #4d5b76;
  --muted: #8794a8;
  --line: #e3e8f3;
  --bg: #f6f8fc;
  --bg-soft: #eaf1fa;
  --white: #ffffff;
  --shadow-sm: 0 2px 6px rgba(14, 58, 130, 0.06);
  --shadow: 0 12px 32px rgba(14, 58, 130, 0.1);
  --shadow-lg: 0 24px 60px rgba(14, 58, 130, 0.18);
  --radius: 14px;
  --radius-lg: 22px;
  --container: 1200px;
  --transition: 0.25s ease;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 700; letter-spacing: 0.01em; color: var(--text); }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
img { max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 999px;
  font-weight: 600; font-size: 15px;
  border: 1px solid transparent;
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  color: #fff; box-shadow: 0 10px 22px rgba(14, 58, 130, 0.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(14, 58, 130, 0.32); color: #fff; }
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: #fff;
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.18); color: #fff; }
.btn-sm { padding: 8px 16px; font-size: 13px; }

/* ===== 顶部导航 ===== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
}
.brand-mark {
  display: inline-flex; align-items: center;
  padding: 6px 14px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #fff; font-weight: 800; font-size: 18px; letter-spacing: 0.02em;
}
.brand-mark-dot { color: var(--gold); padding: 0 2px; }
.brand-logo { height: 44px; width: auto; display: block; border-radius: 8px; }
.brand-name {
  font-weight: 600; color: var(--text); font-size: 15px;
  border-left: 1px solid var(--line); padding-left: 12px;
  white-space: nowrap;
}
.nav {
  display: flex; gap: 4px;
}
.nav a {
  position: relative;
  padding: 10px 12px; border-radius: 8px;
  font-size: 14px; color: var(--text-2); font-weight: 500;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}
.nav a:hover { background: var(--bg-soft); color: var(--primary); }
.nav a.active { background: var(--bg-soft); color: var(--primary); }
.nav-toggle {
  display: none;
  width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 10px;
  background: #fff; flex-direction: column; gap: 4px; align-items: center; justify-content: center;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--primary); border-radius: 2px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  color: #fff;
  padding: 110px 0 90px;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(circle at 18% 22%, rgba(43, 183, 232, 0.45) 0%, transparent 50%),
    radial-gradient(circle at 85% 18%, rgba(246, 183, 60, 0.18) 0%, transparent 50%),
    radial-gradient(circle at 70% 90%, rgba(92, 196, 255, 0.32) 0%, transparent 55%),
    linear-gradient(135deg, #0a2c64 0%, #0e3a82 45%, #1d4ea6 100%);
}
.hero-bg::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  opacity: 0.6;
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(circle 2px at 20% 30%, rgba(255, 255, 255, 0.7), transparent 60%),
    radial-gradient(circle 2px at 75% 20%, rgba(255, 255, 255, 0.6), transparent 60%),
    radial-gradient(circle 1.5px at 60% 60%, rgba(255, 255, 255, 0.5), transparent 60%),
    radial-gradient(circle 1.5px at 30% 80%, rgba(255, 255, 255, 0.5), transparent 60%),
    radial-gradient(circle 2px at 88% 70%, rgba(255, 255, 255, 0.6), transparent 60%);
  opacity: 0.85;
}
.hero-title {
  font-size: clamp(40px, 6.4vw, 72px);
  line-height: 1.1; color: #fff;
  margin-bottom: 18px;
  text-shadow: 0 4px 24px rgba(10, 44, 100, 0.4);
  letter-spacing: 0.04em;
  display: flex; flex-direction: column; align-items: flex-start;
  gap: 6px;
}
.hero-title-sub {
  font-size: clamp(14px, 1.4vw, 18px);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.78);
  letter-spacing: 0.18em;
  text-shadow: none;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.hero-sub {
  font-size: clamp(15px, 1.8vw, 19px);
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 36px; font-weight: 500;
  line-height: 1.7;
}

/* 倒计时 */
.countdown {
  background: linear-gradient(135deg, rgba(43, 183, 232, 0.15), rgba(246, 183, 60, 0.1));
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-bottom: 32px;
  text-align: center;
}
.countdown-label { font-size: 14px; color: rgba(255, 255, 255, 0.85); margin-bottom: 14px; letter-spacing: 0.16em; }
.countdown-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
  max-width: 560px; margin: 0 auto;
}
.countdown-grid > div {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 12px; padding: 16px 8px;
}
.countdown-grid span {
  font-size: clamp(28px, 4.4vw, 40px); font-weight: 800; color: #fff;
  font-feature-settings: "tnum";
  display: block;
}
.countdown-grid em { font-style: normal; font-size: 12px; color: rgba(255, 255, 255, 0.75); letter-spacing: 0.1em; }
.countdown-note { font-size: 12px; color: rgba(255, 255, 255, 0.6); margin-top: 12px; }

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== 下一期会议 ===== */
.next-conf {
  background: linear-gradient(135deg, #0a2c64 0%, #0e3a82 50%, #1d4ea6 100%);
  color: #fff;
  padding: 70px 0;
  position: relative;
  overflow: hidden;
}
.next-conf::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
  opacity: 0.6;
  pointer-events: none;
}
.next-conf .section-head h2 { color: #fff; }
.next-conf .section-head h2::after { background: linear-gradient(90deg, var(--accent-2), var(--gold)); }
.next-conf .section-head p { color: rgba(255, 255, 255, 0.78); }

.next-conf-card {
  position: relative;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  backdrop-filter: blur(10px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18);
}
.next-conf-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px 32px;
}
.next-conf-item { display: flex; flex-direction: column; gap: 8px; }
.nc-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.12em;
}
.nc-value {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  line-height: 1.55;
}
.nc-value a { color: #fff; }
.nc-sub {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.62);
  font-weight: 400;
}
.nc-deadline {
  display: inline-block;
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  font-feature-settings: "tnum";
  padding: 4px 14px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--gold), #ff8a3d);
  box-shadow: 0 6px 18px rgba(246, 183, 60, 0.4);
  letter-spacing: 0.04em;
}
.nc-deadline-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  vertical-align: middle;
}
.next-conf-item--deadline .nc-value { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.next-conf-item--deadline .nc-sub {
  display: block;
  width: 100%;
  margin-top: 6px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== KPI section（已删除，样式保留为占位以免冲突） ===== */
/* .kpis / .kpi-grid / .kpi / .kpi-num / .kpi-label — 旧数据看板已移除 */

/* ===== News strip ===== */
.news-strip { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.news-strip-inner {
  display: flex; align-items: center; gap: 18px;
  padding: 18px 24px;
}
.news-tag {
  flex-shrink: 0;
  padding: 8px 14px; border-radius: 8px;
  background: var(--primary); color: #fff;
  font-size: 13px; font-weight: 700; letter-spacing: 0.16em;
}
.news-list { display: flex; flex-direction: column; gap: 8px; flex: 1; }
.news-item {
  display: flex; gap: 16px; align-items: center;
  padding: 6px 0;
  font-size: 14px; color: var(--text);
}
.news-item:hover { color: var(--primary-light); }
.news-date { font-family: "SF Mono", Menlo, Consolas, monospace; color: var(--muted); font-size: 13px; min-width: 90px; }
.news-title { flex: 1; }

/* ===== 通用 Section ===== */
section { padding: 80px 0; }
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: clamp(28px, 3.5vw, 38px);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}
.section-head h2::after {
  content: ""; position: absolute; bottom: -10px; left: 50%; transform: translateX(-50%);
  width: 60px; height: 3px; border-radius: 2px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
}
.section-head p { color: var(--text-2); margin-top: 20px; font-size: 16px; }
.section-head .section-cta {
  display: inline-block; margin-top: 14px; padding: 6px 16px;
  color: var(--primary); font-size: 15px; font-weight: 500;
  background: rgba(30, 111, 220, 0.08); border-radius: 999px;
  border: 1px dashed rgba(30, 111, 220, 0.35);
}
.section-head .section-cta b { font-weight: 700; }
.section-head .fee-declare {
  margin-top: 14px;
  padding: 10px 16px 10px 12px;
  font-size: 14.5px; line-height: 1.75; text-align: left;
  color: #8a5300; background: #fff7e8;
  border: 1px solid #f3c98b; border-left: 4px solid #f59e0b;
  border-radius: 8px; max-width: 900px;
}
.section-head .fee-declare-tag {
  display: inline-block; margin-right: 8px; padding: 2px 10px;
  font-size: 12.5px; font-weight: 700; letter-spacing: 0.1em;
  color: #fff; background: linear-gradient(135deg, #f59e0b, #f97316);
  border-radius: 999px; vertical-align: 1px;
}

/* ===== 往期回顾 ===== */
.edition-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; align-items: stretch; }
.edition-card {
  position: relative; padding: 32px 28px 24px;
  background: #fff; border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex; flex-direction: column;
}
.edition-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.edition-card--past { background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%); }
.edition-badge {
  position: absolute; top: -12px; right: 24px;
  padding: 6px 14px; border-radius: 999px;
  background: linear-gradient(135deg, var(--gold), #ff7a45); color: #fff;
  font-size: 12px; font-weight: 700; letter-spacing: 0.06em;
  box-shadow: 0 6px 16px rgba(246, 183, 60, 0.35);
}
.edition-badge--past { background: linear-gradient(135deg, var(--primary-light), var(--primary)); box-shadow: 0 6px 16px rgba(14, 58, 130, 0.3); }
.edition-title { font-size: 22px; margin-bottom: 6px; color: var(--text); }
.edition-meta { color: var(--text-2); font-size: 13px; margin-bottom: 14px; }
/* 中国知网收录徽章（往期回顾已举办期显示） */
.cnki-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: 999px;
  background: linear-gradient(135deg, #1a6dca 0%, #0d57b8 100%);
  color: #ffffff; font-size: 12px; font-weight: 600; line-height: 1.2;
  margin: 0 0 14px 0; box-shadow: 0 2px 8px rgba(26, 109, 202, 0.18);
  letter-spacing: 0.2px;
}
.cnki-badge .cnki-mark {
  display: inline-block; padding: 1px 6px; border-radius: 4px;
  background: #ffffff; color: #0d57b8; font-weight: 800; font-size: 11px;
  letter-spacing: 0.5px;
}
.edition-topic {
  display: block; padding: 10px 14px; border-radius: 8px;
  background: var(--bg-soft); color: var(--primary);
  font-size: 14px; font-weight: 700; line-height: 1.5;
  margin-bottom: 18px;
}
.edition-points { list-style: none; margin-bottom: 8px; }
.edition-points li {
  position: relative; padding-left: 18px; margin-bottom: 8px;
  font-size: 13px; color: var(--text-2); line-height: 1.65;
}
.edition-points li b { color: var(--text); font-weight: 600; }
.edition-points li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}
.edition-actions {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  margin-top: auto; padding-top: 18px;
  border-top: 1px dashed var(--line);
}
.edition-actions .btn { width: 100%; padding: 10px 8px; font-size: 13px; }
.edition-card .btn-ghost { background: var(--bg-soft); color: var(--primary); border-color: transparent; }
.edition-card .btn-ghost:hover { background: var(--primary); color: #fff; }
.edition-card .btn.disabled,
.edition-card .btn[aria-disabled="true"] {
  background: #f3f5f9; color: #b3bcc8; cursor: not-allowed; pointer-events: none;
  border: 1px dashed #d6dde6;
}
.edition-cta {
  display: block; text-align: center;
  margin-top: 12px; padding: 12px 16px;
  font-size: 14px; font-weight: 700;
}

/* ===== 关于 ===== */
.about { background: var(--bg); }
.about-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 32px; }
.about-card {
  padding: 26px 26px; background: #fff;
  border-radius: var(--radius); border: 1px solid var(--line);
}
.about-card h4 { font-size: 17px; margin-bottom: 10px; color: var(--primary); }
.about-card p { font-size: 14px; color: var(--text-2); }
.about-card .topic-line {
  font-size: 18px; font-weight: 700; color: var(--text);
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.org-list { list-style: none; }
.org-list li { padding: 6px 0; font-size: 14px; color: var(--text-2); border-bottom: 1px dashed var(--line); }
.org-list li:last-child { border-bottom: none; }
.org-list b { color: var(--text); }

.about-sub {
  font-size: 20px; margin: 32px 0 18px;
  display: flex; align-items: center; gap: 10px;
}
.about-sub::before {
  content: ""; display: inline-block; width: 4px; height: 18px; border-radius: 2px;
  background: linear-gradient(180deg, var(--primary-light), var(--accent));
}
.content-list { padding-left: 24px; color: var(--text-2); font-size: 15px; }
.content-list li { margin-bottom: 8px; }

/* ===== 会议简介 · 基本信息（4 字段） ===== */
.intro-fields {
  display: grid;
  grid-template-columns: 1.1fr 1.2fr 1.4fr;
  gap: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.ifield {
  padding: 28px 28px;
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 12px;
}
.ifield:last-child { border-right: none; }
.ifield--wide { background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%); }
.ifield-label {
  font-size: 12px; color: var(--muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.ifield-value {
  font-size: 16px; color: var(--text);
  line-height: 1.7;
}
.ifield-value b { color: var(--primary); font-weight: 700; }
.ifield-value--lg {
  font-size: 22px; font-weight: 800;
  color: var(--primary); line-height: 1.45;
  letter-spacing: 0.01em;
}
.ifield-tags {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
}
.itag {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--primary);
  font-size: 14px; font-weight: 700;
  letter-spacing: 0.04em;
}
.itag-plus {
  display: inline-block;
  color: var(--accent); font-weight: 800; font-size: 18px;
  line-height: 1;
}

/* ===== 会议背景 · 引文 ===== */
.about-bg { margin-top: 8px; }
.about-quote {
  position: relative;
  margin: 0 0 18px;
  padding: 18px 22px 18px 26px;
  background: linear-gradient(135deg, rgba(43, 183, 232, 0.08), rgba(14, 58, 130, 0.04));
  border-left: 4px solid var(--primary-light);
  border-radius: 0 12px 12px 0;
  font-size: 16px; line-height: 1.85;
  color: var(--text);
}
.about-quote::before {
  content: "\201C"; position: absolute; left: 12px; top: 6px;
  font-size: 36px; color: var(--accent); opacity: 0.5;
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1;
}
.about-quote cite {
  display: block; margin-top: 10px;
  font-style: normal; font-size: 13px;
  color: var(--primary); font-weight: 600;
  letter-spacing: 0.06em;
}

.phase-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.phase-grid--3 { grid-template-columns: repeat(3, 1fr); }
.phase-card {
  padding: 26px; background: #fff;
  border-radius: var(--radius); border: 1px solid var(--line);
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 12px;
}
.phase-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(43, 183, 232, 0.05), rgba(14, 58, 130, 0.03));
}
.phase-tag {
  display: inline-block; padding: 6px 14px; border-radius: 6px;
  background: var(--primary); color: #fff;
  font-size: 13px; font-weight: 700;
  position: relative;
  align-self: flex-start;
}
.phase-card p { font-size: 14px; color: var(--text-2); position: relative; line-height: 1.75; }
.phase-card p + p { margin-top: 0; }
.phase-meta {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13px !important; color: var(--muted) !important;
}
.phase-meta b { color: var(--accent); font-weight: 700; }
.phase-card--accent {
  background: linear-gradient(135deg, #0a2c64 0%, #1d4ea6 100%);
  border-color: transparent;
  color: #fff;
}
.phase-card--accent::before {
  background:
    radial-gradient(circle at 85% 15%, rgba(246, 183, 60, 0.25), transparent 50%),
    radial-gradient(circle at 15% 85%, rgba(92, 196, 255, 0.25), transparent 55%);
}
.phase-card--accent p { color: rgba(255, 255, 255, 0.92); }
.phase-card--accent .phase-meta { color: rgba(255, 255, 255, 0.78) !important; border-top-color: rgba(255, 255, 255, 0.18); }
.phase-card--accent .phase-meta b { color: var(--gold); }
.phase-tag--accent {
  background: linear-gradient(135deg, var(--gold), #ff8a3d);
  color: #fff;
  box-shadow: 0 6px 16px rgba(246, 183, 60, 0.35);
}
.about-text { font-size: 15px; color: var(--text-2); line-height: 1.85; }

/* ===== 报告嘉宾 ===== */
.speakers { background: var(--bg); }
.tab-tag--soon {
  margin-left: 8px;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 11px;
  background: rgba(14, 58, 130, 0.12);
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.05em;
  vertical-align: middle;
}
.speaker-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin: 18px 0 36px;
}
.speaker-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 24px 26px;
  box-shadow: 0 4px 14px rgba(14, 58, 130, 0.05);
  transition: all 0.25s ease;
}
.speaker-card:hover {
  border-color: rgba(14, 58, 130, 0.35);
  box-shadow: 0 8px 22px rgba(14, 58, 130, 0.12);
  transform: translateY(-2px);
}
.speaker-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  border-bottom: 1px dashed var(--line);
  padding-bottom: 12px;
  margin-bottom: 14px;
}
.speaker-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: 0.02em;
}
.speaker-title {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.speaker-topic {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  line-height: 1.55;
}
.speaker-bio {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.78;
  margin: 0;
  text-align: justify;
}
.speaker-card--compact .speaker-name { font-size: 18px; }
.speaker-card--compact .speaker-title { font-size: 12.5px; }

.speaker-pending {
  text-align: center;
  background: linear-gradient(135deg, rgba(14, 58, 130, 0.04), rgba(14, 58, 130, 0.09));
  border: 1px dashed rgba(14, 58, 130, 0.25);
  border-radius: var(--r-md);
  padding: 56px 28px;
  margin-top: 18px;
}
.speaker-pending-icon {
  font-size: 42px;
  margin-bottom: 14px;
}
.speaker-pending h3 {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 12px;
}
.speaker-pending p {
  font-size: 14.5px;
  color: var(--text-2);
  max-width: 680px;
  margin: 0 auto 10px;
  line-height: 1.78;
}
.speaker-pending a { color: var(--primary); font-weight: 600; text-decoration: underline; }

@media (max-width: 1024px) {
  .speaker-grid { grid-template-columns: 1fr; }
}

/* ===== 媒体关注 ===== */
.media { background: #fff; }
.media-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.media-card {
  display: flex; flex-direction: column;
  border-radius: var(--radius-lg); border: 1px solid var(--line); overflow: hidden;
  background: #fff; box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.media-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.media-card--placeholder { opacity: 0.78; }

.media-thumb {
  position: relative; aspect-ratio: 16/9;
  background:
    radial-gradient(circle at 70% 30%, rgba(43, 183, 232, 0.45), transparent 60%),
    linear-gradient(135deg, #0a2c64 0%, #1d4ea6 60%, #2bb7e8 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  overflow: hidden;
}
.media-thumb--video {
  background:
    radial-gradient(circle at 25% 75%, rgba(246, 183, 60, 0.5), transparent 60%),
    linear-gradient(135deg, #1d4ea6 0%, #0e3a82 60%, #0a2c64 100%);
}
.media-thumb::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 32px 32px; opacity: 0.55;
}
.media-play {
  position: relative; z-index: 1;
  width: 64px; height: 64px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.18); backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; padding-left: 5px;
  border: 2px solid rgba(255, 255, 255, 0.55);
  transition: transform var(--transition);
}
.media-card:hover .media-play { transform: scale(1.08); }
.media-overlay {
  position: absolute; left: 14px; top: 14px; z-index: 1;
  padding: 4px 10px; border-radius: 6px;
  background: rgba(0, 0, 0, 0.35); backdrop-filter: blur(6px);
  font-size: 12px; letter-spacing: 0.06em;
}

.media-body { padding: 22px 22px; flex: 1; display: flex; flex-direction: column; }
.media-meta { display: flex; gap: 12px; align-items: center; margin-bottom: 10px; }
.media-source { font-size: 13px; color: var(--primary); font-weight: 700; }
.media-date { font-size: 12px; color: var(--muted); }
.media-card h3 { font-size: 17px; line-height: 1.5; margin-bottom: 10px; }
.media-card p { font-size: 13px; color: var(--text-2); margin-bottom: 16px; flex: 1; }
.media-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.media-link { font-size: 12px; color: var(--muted); font-family: "SF Mono", Menlo, Consolas, monospace; word-break: break-all; }
.media-link--placeholder { color: var(--gold); }

/* ===== 投稿须知 ===== */
.submission { background: var(--bg); }
.tabs { display: flex; gap: 6px; margin-bottom: 28px; flex-wrap: wrap; }
.tab {
  padding: 10px 18px; border: 1px solid var(--line); background: #fff;
  border-radius: 999px; font-size: 14px; font-weight: 600; color: var(--text-2);
  transition: all var(--transition);
}
.tab:hover { color: var(--primary); border-color: var(--accent); }
.tab-active {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #fff; border-color: transparent;
  box-shadow: 0 8px 18px rgba(14, 58, 130, 0.22);
}

.sub-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 28px; }
.sub-card { padding: 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.sub-card h4 { color: var(--primary); margin-bottom: 10px; font-size: 16px; }
.sub-card p { font-size: 14px; color: var(--text-2); }
.sub-card .big-num { font-size: 30px; font-weight: 800; color: var(--primary); font-feature-settings: "tnum"; }
.sub-card .muted { font-size: 12px; }
.muted { color: var(--muted); font-size: 14px; }

.sub-section {
  font-size: 17px; margin: 28px 0 12px;
  display: flex; align-items: center; gap: 10px;
}
.sub-section::before {
  content: ""; display: inline-block; width: 4px; height: 16px; border-radius: 2px;
  background: var(--accent);
}
.fee-table { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.fee-row {
  display: grid; grid-template-columns: 1.4fr 1fr 1.2fr;
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
.fee-row--head {
  background: var(--primary); color: #fff;
  font-weight: 700;
  border-top: none;
}
.fee-row:nth-child(odd):not(.fee-row--head) { background: #fafcff; }
.fee-row--highlight {
  background: linear-gradient(135deg, rgba(43, 183, 232, 0.08), rgba(14, 58, 130, 0.04));
  font-weight: 600;
}

.submit-callout {
  margin-top: 24px; padding: 22px 26px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  box-shadow: var(--shadow);
}
.callout-label { font-size: 13px; color: rgba(255, 255, 255, 0.8); letter-spacing: 0.08em; }
.callout-value { font-size: 22px; font-weight: 800; font-family: "SF Mono", Menlo, Consolas, monospace; }

/* 投稿须知 · Tab 状态标签 */
.tab-tag {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 999px;
  vertical-align: middle;
  line-height: 1.5;
}
.tab-tag--live { background: rgba(14, 58, 130, 0.1); color: var(--primary, #0e3a82); border: 1px solid rgba(14, 58, 130, 0.35); }
.tab-active .tab-tag--live { background: rgba(255, 255, 255, 0.22); color: #fff; border: 1px solid rgba(255, 255, 255, 0.4); }

/* 地区高亮标（第五期 · 广西） */
.region-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, #e85d2a, #d43f2c);
  color: #fff;
  font-size: 0.72em;
  font-weight: 700;
  letter-spacing: 0.08em;
  vertical-align: middle;
  box-shadow: 0 2px 6px rgba(212, 63, 44, 0.35);
}
.tab-tag--done { background: rgba(14, 58, 130, 0.06); color: var(--primary, #0e3a82); border: 1px solid rgba(14, 58, 130, 0.28); }
.tab-active .tab-tag--done { background: rgba(255, 255, 255, 0.22); color: #fff; border: 1px solid rgba(255, 255, 255, 0.4); }

/* 投稿须知 · 投稿截止卡 / 已截止变体 */
.sub-card--deadline { border-color: rgba(14, 58, 130, 0.18); background: linear-gradient(180deg, #fff, #fafcff); }
.sub-card--deadline h4::after { content: " · 进行中"; font-size: 12px; color: #ff7a45; font-weight: 600; }
.sub-card--deadline .big-num { color: #ff7a45; }
.sub-card--done .big-num { color: var(--muted); }
.sub-card--done h4::after { content: " · 已截止"; font-size: 12px; color: var(--muted); font-weight: 600; }

/* 投稿须知 · 12 条要求列表 */
.content-list { padding-left: 22px; color: var(--text-2); font-size: 15px; line-height: 1.8; }
.content-list li { margin-bottom: 10px; padding-left: 4px; }
.content-list li::marker { color: var(--primary); font-weight: 700; }

/* 投稿须知 · 附件下载 */
.attach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.attach-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.attach-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}
.attach-num {
  display: inline-block;
  align-self: flex-start;
  padding: 2px 10px;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  letter-spacing: 0.05em;
}
.attach-title { font-size: 15px; font-weight: 700; color: var(--text); }
.attach-meta { font-size: 12px; color: var(--muted); }
.attach-card--disabled {
  cursor: not-allowed;
  background: #fafbfc;
  border-style: dashed;
}
.attach-card--disabled:hover { transform: none; box-shadow: none; border-color: var(--line); }
.attach-card--disabled .attach-num { background: var(--muted); opacity: 0.6; }
.attach-card--disabled .attach-title { color: var(--muted); }

/* 投稿要求标题下的内联附件下载按钮 */
.attach-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: -6px 0 22px;
}
.attach-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(14, 58, 130, 0.25);
  background: rgba(14, 58, 130, 0.06);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
}
.attach-link::before { content: "⬇"; font-size: 13px; }
.attach-link:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(14, 58, 130, 0.25);
}

/* 投稿须知 · 已截止 callout 变体 */
.submit-callout--done {
  background: linear-gradient(135deg, #6c7a93, #48556b);
}

/* ===== 联系我们 · 横排 4 列 ===== */
.contact { background: var(--bg); }
.contact-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}
.contact-tile {
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.contact-tile:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}
.contact-tile--qr { padding: 24px 20px; }
.ct-icon { font-size: 32px; line-height: 1; }
.ct-label {
  font-size: 13px; color: var(--muted);
  letter-spacing: 0.1em; margin-top: 4px;
}
.ct-value {
  font-size: 22px; font-weight: 800;
  color: var(--primary);
  font-feature-settings: "tnum";
  letter-spacing: 0.02em;
  word-break: break-all;
}
.ct-value a { color: var(--primary); }
.ct-sub {
  font-size: 12px; color: var(--text-2);
  line-height: 1.6;
}

/* 二维码组件 */
.qrcode-img {
  width: 160px; height: 160px;
  border-radius: 12px;
  background: var(--bg);
  border: 1px dashed var(--line);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; position: relative;
  margin: 0 auto;
}
.qrcode-img img { width: 100%; height: 100%; object-fit: contain; }
.qrcode-img.qrcode-placeholder {
  border-style: dashed;
  background: repeating-linear-gradient(45deg, #fafcff, #fafcff 10px, #f0f5fb 10px, #f0f5fb 20px);
}
.qrcode-placeholder-text {
  font-size: 13px; color: var(--muted); line-height: 1.7;
  padding: 14px; text-align: center;
}
.qrcode-placeholder-text span { font-size: 11px; color: #94a3b8; display: inline-block; margin-top: 6px; }

/* ===== Footer ===== */
.footer { background: #0a1f44; color: rgba(255, 255, 255, 0.78); padding: 60px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1fr 1.6fr; gap: 48px; padding-bottom: 40px; }
.footer-brand .brand-mark { font-size: 20px; padding: 8px 16px; margin-bottom: 12px; }
.footer-brand .brand-logo { height: 60px; margin-bottom: 12px; border-radius: 10px; }
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 320px; }
.footer-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.footer-cols h5 { color: #fff; margin-bottom: 14px; font-size: 14px; letter-spacing: 0.1em; }
.footer-cols a, .footer-cols p {
  display: block; padding: 4px 0; font-size: 14px; color: rgba(255, 255, 255, 0.72);
}
.footer-cols a:hover { color: var(--accent-2); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 18px 0;
  font-size: 12px; color: rgba(255, 255, 255, 0.5);
}
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

.footer-support {
  background: rgba(255, 255, 255, 0.03);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 14px 0;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.8;
  text-align: center;
}
.footer-support .container { max-width: 1180px; }
.footer-support .fs-label { color: rgba(255, 255, 255, 0.85); font-weight: 600; margin-right: 8px; }
.footer-support .fs-items { letter-spacing: 0.02em; }

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px 0;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
  letter-spacing: 0.04em;
}
.footer-copyright .container { max-width: 1180px; }
.footer-beian { margin-top: 6px; }
.footer-beian a { color: rgba(255, 255, 255, 0.55); text-decoration: none; }
.footer-beian a:hover { color: rgba(255, 255, 255, 0.85); text-decoration: underline; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  /* .kpi-grid / .kpi 已随 KPI 移除 */
  /* 导航共 9 项：中等宽度下收紧间距并隐藏站名文字，避免溢出裁切 */
  .brand-name { display: none; }
  .nav { gap: 2px; }
  .nav a { padding: 10px 8px; font-size: 13px; }
  .edition-grid, .media-grid, .contact-row { grid-template-columns: repeat(2, 1fr); }
  .next-conf-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-fields { grid-template-columns: 1fr 1fr; }
  .ifield--wide { grid-column: 1 / -1; border-top: 1px solid var(--line); border-right: none; }
  .phase-grid--3 { grid-template-columns: repeat(2, 1fr); }
}
/* 880px 以下导航收进汉堡菜单（项数多，防挤压） */
@media (max-width: 880px) {
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .nav.open {
    display: flex; flex-direction: column; gap: 4px;
    position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; padding: 16px 20px; border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  .nav.open a { padding: 12px 14px; }
}
@media (max-width: 768px) {
  section { padding: 56px 0; }
  .topbar-inner { height: 60px; }
  .brand-name { display: none; }
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .nav.open {
    display: flex; flex-direction: column; gap: 4px;
    position: absolute; top: 60px; left: 0; right: 0;
    background: #fff; padding: 16px 20px; border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  .nav.open a { padding: 12px 14px; }
  .hero { padding: 70px 0 60px; }
  .countdown-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
  /* .kpi-grid 已随 KPI 移除 */
  .news-strip-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
  .next-conf-card { padding: 24px 22px; }
  .next-conf-grid { grid-template-columns: 1fr; gap: 18px; }
  .intro-fields { grid-template-columns: 1fr; }
  .ifield { border-right: none; border-top: 1px solid var(--line); }
  .ifield:first-child { border-top: none; }
  .ifield--wide { border-top: 1px solid var(--line); }
  .edition-grid, .media-grid, .contact-row, .about-grid, .sub-grid, .phase-grid, .phase-grid--3 { grid-template-columns: 1fr; }
  .edition-actions { grid-template-columns: 1fr; }
  .fee-row { grid-template-columns: 1fr; gap: 4px; padding: 12px 16px; }
  .fee-row > div { padding: 2px 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; padding-bottom: 28px; }
  .footer-cols { grid-template-columns: 1fr; }
  .hero-cta .btn { flex: 1; min-width: 140px; }
  .submit-callout { flex-direction: column; align-items: stretch; text-align: center; }
  .attach-grid { grid-template-columns: 1fr; }
  .tab { width: 100%; display: flex; align-items: center; justify-content: center; }
}
@media (max-width: 480px) {
  /* .kpi 相关规则已随 KPI 移除 */
}