/* =========================================================
   Design Tokens — 借鉴参考站点的红/深炭灰工业风
   ========================================================= */
@import url('https://files.sciconf.cn/asset/module/fonticonpicker/css/fontello-7275ca86/css/fontello.css?v=202310231529');
:root {
  --primary: #1e88ff;
  --primary-dark: #1565d8;
  --primary-darker: #0c4a99;
  --primary-light: #7ab8ff;
  --primary-glow: rgba(30, 136, 255, 0.22);

  /* 主题色：单一源头（与 c21 一致）。layout.php 的 <head> 内联 :root 提供 --theme-color
     与导航配色（--web-nav-*），并由内联 JS 从其派生 --theme-color-2 / --theme-color-soft。 */
  --theme-color: #1e88ff;
  --theme-color-2: #1565d8;                     /* JS 派生的深色，用于渐变/层次 */
  --theme-color-soft: rgba(30, 136, 255, 0.10);  /* JS 派生的浅色，用于填充/悬停 */
  --primary: var(--theme-color, #1e88ff);        /* 主色由 --theme-color 驱动 */

  --dark: #1e2228;
  --dark-2: #2d2d2d;
  --dark-3: #3a3f47;

  /* Tech-blue dark backgrounds (replacing the original charcoal fills) */
  --navy: #0b1b33;
  --navy-2: #10264a;
  --navy-3: #1b3a6b;

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #7a7a7a;
  --gray-600: #6b7280;
  --gray-700: #4b5563;

  --white: #ffffff;

  --font-body: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  --font-display: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;

  --shadow-sm: 0 2px 8px rgba(30, 34, 40, 0.08);
  --shadow-md: 0 8px 24px rgba(30, 34, 40, 0.12);
  --shadow-lg: 0 16px 48px rgba(30, 34, 40, 0.18);
  --shadow-xl: 0 32px 80px rgba(30, 34, 40, 0.22);

  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --container: 1280px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; overflow-x: hidden;height:auto; }
body {
  font-family: var(--font-body);
  color: var(--dark);
  background: var(--bg-color);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.page-content{
  flex:1;
}
/* =========================================================
   Utility
   ========================================================= */
.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }

.module-wrap:nth-child(even) { background: #fff; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 16px;
}
.section-label::before {
  content: '';
  width: 60px;
  height: 3px;
  background: var(--primary);
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--dark);
  letter-spacing: -0.02em;
}
.section-subtitle {
  font-size: 16px;
  color: var(--gray-500);
  margin-top: 16px;
  max-width: 640px;
}
.section-header {
  margin-bottom: 56px;
  position: relative;
}
.section-header.center { text-align: center; }
.section-header.center .section-subtitle { margin-left: auto; margin-right: auto; }

/* =========================================================
   Section "More" button — 全站栏目右上角统一样式
   ========================================================= */
.section-header.has-more { padding-right: 176px; }
.section-header.center.has-more { padding-right: 0; }
.section-header > .section-more { position: absolute; right: 0; bottom: 0; }

.section-more {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  color: var(--dark);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 0;
  overflow: hidden;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.35s, border-color 0.35s, color 0.35s, box-shadow 0.35s;
}
.section-more > span { position: relative; z-index: 1; }
.section-more > svg[data-ico] {
  position: relative;
  z-index: 1;
  width: 11px;
  height: 11px;
  color: var(--primary);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), color 0.35s;
}
.section-more::before {
  content: '';
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skew(-20deg);
  transition: left 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.section-more:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  box-shadow: 0 10px 26px var(--primary-glow);
}
.section-more:hover > svg[data-ico] { color: var(--white); transform: translateX(6px); }
.section-more:hover::before { left: 130%; }

/* 深色背景上的「更多」（倒计时栏目） */
.section-more--dark {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--white);
}
.section-more--dark > svg[data-ico] { color: var(--primary-light); }

/* 各栏目中的位置微调 */
.countdown-info .section-more { margin-top: 28px; }
.welcome-content .section-more { margin-top: 32px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px var(--primary-glow);
}
.btn-outline {
  background: transparent;
  color: var(--navy);
  border: 1.5px solid var(--navy);
}
.btn-outline:hover {
  background: var(--navy);
  color: var(--white);
}
.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.3);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
}

/* =========================================================
   1. 语言切换 (Top Bar)
   ========================================================= */
.topbar {
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 40px;
}
.topbar-left { display: flex; align-items: center; gap: 24px; }
.topbar-info { display: flex; align-items: center; gap: 6px; }
.topbar-info svg[data-ico] { color: var(--primary); width: 12px; height: 12px; }
.topbar-right { display: flex; align-items: center; gap: 20px; }

.lang-switch {
  display: inline-flex;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  padding: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}
.lang-switch button {
  padding: 4px 12px;
  color: rgba(255,255,255,0.55);
  border-radius: 3px;
  transition: all 0.2s;
}
.lang-switch button.active {
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
}

/* =========================================================
   3. 菜单导航 (Sticky Menu)
   ========================================================= */
.menu-nav {
  background: var(--web-nav-color, #fff);
  /* border-bottom: 1px solid var(--gray-200); */
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
/* 让菜单导航的 sticky 真正生效：
   原先 nav 被 <section class="module-wrap"> 包裹，而该 section 高度 = nav 自身高度，
   导致 sticky 的「包含块」被限制在这 72px 内，滚动时没有任何吸顶行程。
   对菜单模块改用 display:contents，使其脱离该 wrapper 的盒模型，
   sticky 的包含块回退为 body（整页高度），从而全程吸顶。 */
.module-wrap[data-module-id="menu"] { display: contents; }

.menu-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.menu-logo {
}

.menu-logo img{
  width:auto;
  height:auto;
  margin-right:30px;
  max-width: 200px;
  max-height:35px;
}

.menu-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin-bottom:0;
}
.menu-list a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--web-nav-font-color, #222);
  position: relative;
  transition: color 0.2s;
}
.menu-list a:hover, .menu-list li.active a{ color: var(--web-nav-font-active-color, #0372a4); }
.menu-list a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--web-nav-active-color, #0372a4);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s;
}
.menu-list a:hover::after , .menu-list li.active a::after { transform: scaleX(1); }
.menu-list a.active { color: var(--web-nav-font-active-color, #0372a4); }
.menu-list a.active::after { transform: scaleX(1); background: var(--web-nav-active-color, #0372a4); }
.menu-list li.active > .menu-trigger { color: var(--web-nav-font-active-color, #0372a4); }

/* 二级菜单（参考 c21 的 nav-trigger / nav-dropdown） */
.menu-list > li { position: relative; }
.menu-trigger {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--web-nav-font-color, #222);
  cursor: pointer;
  white-space: nowrap;
}
.menu-trigger svg { transition: transform 0.25s ease; }
.menu-list > li.has-dropdown:hover > .menu-trigger { color: var(--web-nav-font-active-color, #0372a4); }
.menu-list > li.has-dropdown:hover > .menu-trigger svg { transform: rotate(180deg); }

.menu-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translate(-50%, 8px);
  min-width: 220px;
  margin: 0;
  padding: 8px 0;
  list-style: none;
  background: var(--white);
  border-radius: 10px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  z-index: 60;
}
.menu-list > li.has-dropdown:hover > .menu-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}
/* 二级菜单项：文字色显式锁定。
   注意：主题/CMS 常会注入形如 `.menu-nav .menu-list li a { color: <导航文字色> }` 的规则，
   它的优先级(0,2,2)高于原本的 `.menu-dropdown li a`(0,1,2)，会把二级菜单文字刷成导航文字色；
   导航文字色在深色导航下是白色，落在白色卡片上就变成「白字白底」而看不见。
   这里用更高优先级 + !important 把二级菜单自己的配色钉死。 */
.menu-nav .menu-list .menu-dropdown li a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 400;
  color: var(--gray-700, #4b5563) !important;
  white-space: nowrap;
}
.menu-nav .menu-list .menu-dropdown li a:hover {
  background: var(--theme-color-soft, rgba(3, 114, 164, 0.08));
  /* 卡片是白底，hover 用品牌主色（而不是导航选中色，后者可能是白色） */
  color: var(--primary, #0372a4) !important;
}
.menu-nav .menu-list .menu-dropdown li a::after { display: none; }

.menu-actions { display: flex; align-items: center; gap: 12px; }

/* 汉堡按钮：桌面端隐藏。
   注意：底色不能写死白色 —— 导航配色是可配置的（深色/高饱和底 + 白字很常见），
   白底 + 白图标会让菜单图标直接「消失」。
   这里改为「半透明黑底 + 中性描边 + 图标颜色跟随导航文字色」，
   与移动端二级菜单面板用同一套手法，任何导航配色下都可见。 */
.menu-burger {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(128, 128, 128, 0.5);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  cursor: pointer;
  color: var(--web-nav-font-color, #222);
  font-size: 17px;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
  flex: 0 0 auto;
}
.menu-burger:hover { border-color: currentColor; background: rgba(255, 255, 255, 0.03); }
.menu-burger.is-open { background: rgba(0, 0, 0, 0.22); border-color: currentColor; color: var(--web-nav-font-color, #222); }

/* =========================================================
   2. 头图 (Hero 1920x500)
   ========================================================= */
.hero {
  position: relative;
  width: 100%;
  max-height: 700px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--navy);
}
.hero video.pv-video {
    object-fit: cover;
}

/* =========================================================
   4. 快捷入口 (Quick Access)
   —— 样式对齐参考站 banner 下方 CTA 按钮：
      直角 / 大写粗体加字距 / 白字红底 / 扫光 / 箭头右移
   ========================================================= */
.quick {
  padding: 40px 0;
}
.quick-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

/* —— 按钮本体 —— */
.quick-btn {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 26px;
  border-radius:var(--radius-md);                      /* 参考站：0 圆角 */
  background: var(--white);
  border: 1px solid var(--navy);
  color: var(--navy);
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}
/* 扫光层（复刻参考站 .btn-shine::before） */
.quick-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(120deg, rgba(0,0,0,0), rgba(255,255,255,0.25), rgba(0,0,0,0));
  transform: skew(-20deg);
  transition: left 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
  z-index: 1;
}
.quick-btn:hover::before { left: 130%; }

/* 主按钮：红底白字（= GET YOUR FREE ESTIMATE） */
.quick-btn:first-child{
  background: var(--theme-color);
  border-color: var(--theme-color);
  color: var(--white);
}
.quick-btn:first-child[style*="--item-bg-color"]{
  background: var(--item-bg-color);
  border-color: var(--item-bg-color);
  color: var(--white);
}
.quick-btn:first-child[style*="--item-bg-color"] .quick-btn-icon{
    background: rgba(255,255,255,0.18);
}

.quick-btn:not(:first-child)[style*="--item-bg-color"] {
  border-color: var(--item-bg-color);
  color: var(--item-bg-color);
}
.quick-btn:not(:first-child)[style*="--item-bg-color"] .quick-btn-icon{
  background: var(--item-bg-color);
}

.quick-btn:hover {
  background: var(--theme-color);
  border-color: var(--theme-color);
  color: var(--white);
}

/* 次级按钮 hover：填充为品牌红（= 参考站 hover:bg-accent） */
.quick-btn:not(:first-child)[style*="--item-bg-color"]:hover {
  background: var(--item-bg-color)!important;
  border-color: var(--item-bg-color)!important;
  color: var(--white);
}



/* 图标方块 */
.quick-btn-icon {
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 0;
  font-size: 18px;
  background: var(--navy);
  color: var(--white);
  transition: background 0.3s ease, color 0.3s ease;
}
.quick-btn-icon-img {
  width: 24px;
  height: 24px;
  object-fit: contain;
}
.quick-btn-icon i{
  font-size: 24px;
}
.quick-btn:hover .quick-btn-icon {
  background: rgba(255,255,255,0.18)!important;
}

/* 文字区 */
.quick-btn-text {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.quick-btn-name {
  font-size: 16px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.quick-btn-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.55;
  transition: opacity 0.3s ease;
}
.quick-btn:hover .quick-btn-en { opacity: 0.85; }
/* 英文模式下主标题已是英文，隐藏重复的副标签 */
html[lang="en"] .quick-btn-en { display: none; }

/* 箭头：hover 右移（复刻参考站 hover:gap） */
.quick-btn-arrow {
  flex: 0 0 auto;
  font-size: 15px;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.quick-btn:hover .quick-btn-arrow { transform: translateX(6px); }

/* =========================================================
   5. 倒计时 (Countdown)
   ========================================================= */
.countdown {
  padding: 60px 0;
  background: linear-gradient(135deg, #0b1b33 0%, #10264a 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.countdown::before {
  content: 'COUNTDOWN';
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 200px;
  font-weight: 800;
  color: rgba(255,255,255,0.03);
  letter-spacing: -0.05em;
  pointer-events: none;
  white-space: nowrap;
}
.countdown-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}
.countdown-info {
  max-width: 480px;
}
.countdown-info .section-label { color: var(--primary-light); }
.countdown-info .section-label::before { background: var(--primary); }
.countdown-info h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 12px;
}
.countdown-info p { color: rgba(255,255,255,0.65); font-size: 14px; }

.timer {
  display: flex;
  gap: 12px;
}
.timer-cell {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  min-width: 92px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.timer-cell::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--primary);
}
.timer-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
}
.timer-label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
}

/* =========================================================
   6. 截止日期 (Deadline)  — 「标题 + 大号日期」可点击卡片（整卡可点）
   ========================================================= */
.deadline {
  padding: 60px 0;
}
.deadline-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.deadline-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;   /* 标题贴顶、大号日期压底，三张卡的日期自动齐平 */
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(.22,1,.36,1);
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  min-height: 200px;
}
.deadline-card::after {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 4px;
  background: var(--primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .35s cubic-bezier(.22,1,.36,1);
}
.deadline-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.deadline-card:hover::after { transform: scaleY(1); }
.deadline-card.featured {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

/* 标题（原 eyebrow 升级为正经标题） */
.deadline-title {
  font-size: 19px;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 10px;
}
.deadline-title::before {
  content: '';
  flex: 0 0 auto;
  width: 22px;
  height: 2px;
  background: var(--primary);
}

/* 突出的大号时间 */
.deadline-date {
  display: flex;
  align-items: baseline;
  gap: 12px;
  line-height: 0.9;
  color: var(--primary);
  font-family: var(--font-body);
  font-weight: 900;
  letter-spacing: -0.03em;
}
.deadline-date .month {
  font-size: 28px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.85;
}
.deadline-date .day {
  font-size: 72px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-darker) 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--primary);
}
.deadline-date .year {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--primary-dark);
  opacity: 0.55;
  align-self: flex-end;
  padding-bottom: 8px;
  font-family: var(--font-mono);
}

/* featured(深蓝)卡片覆写 */
.deadline-card.featured .deadline-title { color: var(--white); }
.deadline-card.featured .deadline-title::before { background: var(--primary-light); }
.deadline-card.featured .deadline-date .day {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--primary-light);
}
.deadline-card.featured .deadline-date .year { color: var(--white); }
.deadline-card.featured::after { background: var(--primary-light); }

/* =========================================================
   7. 轮播图 (Carousel)
   ========================================================= */
.carousel {
  padding: 80px 0;
}
.carousel-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.carousel-track {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.65, 0, 0.35, 1);
}
.carousel-slide {
  min-width: 100%;
  position: relative;
}
.carousel-slide img{
  aspect-ratio: 2 / 1;
}
.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.9);
  color: var(--dark);
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 18px;
  transition: all 0.2s;
  z-index: 2;
}
.carousel-arrow:hover { background: var(--primary); color: var(--white); }
.carousel-arrow.prev { left: 24px; }
.carousel-arrow.next { right: 24px; }
.carousel-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 24px;
}
.carousel-dots span {
  width: 32px;
  height: 3px;
  background: var(--gray-300);
  cursor: pointer;
  transition: all 0.2s;
}
.carousel-dots span.active { background: var(--primary); width: 56px; }

/* =========================================================
   8. 欢迎词 (Welcome)
   ========================================================= */
.welcome {
  padding: 100px 0;
}
/* 标题区：上移到网格之上，跨整行 */
.welcome-head {
  margin-bottom: 56px;
}
.welcome-head h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 880px;
}
.welcome-head h2 em { color: var(--primary); font-style: normal; }

/* 左图右文：align-items 用默认 stretch，
   照片不再写死高度，而是拉伸到与右侧内容（正文 + 签名 + More）等高 */
.welcome-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: stretch;
}
.welcome-image {
  position: relative;
  min-height: 480px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #0b1b33 0%, #10264a 100%);
}
.welcome-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, transparent 0 30px, rgba(30,136,255,0.08) 30px 31px);
}
.welcome-image-portrait {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 96px;
  font-weight: 800;
  color: rgba(255,255,255,0.08);
  letter-spacing: -0.04em;
}
.welcome-image-badge {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  padding: 16px 20px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 14px;
}
.welcome-image-badge svg[data-ico] { color: var(--primary); width: 20px; height: 20px; }
.welcome-image-badge div { display: flex; flex-direction: column; line-height: 1.3; }
.welcome-image-badge strong { font-size: 13px; color: var(--dark); }
.welcome-image-badge span { font-family: var(--font-mono); font-size: 10px; color: var(--gray-500); letter-spacing: 0.1em; text-transform: uppercase; }

.welcome-content .rich-body {
  font-size: 16px;
  line-height: 1.85;
  color: var(--gray-700);
}
.welcome-content .rich-body p { margin-bottom: 16px; }
.welcome-content .rich-body strong { color: var(--dark); font-weight: 600; }
.welcome-signature {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 16px;
}
.welcome-signature-name {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 28px;
  font-weight: 700;
  color: var(--dark);
}
.welcome-signature-meta {
  text-align: right;
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.5;
}
.welcome-signature-meta strong {
  display: block;
  color: var(--dark);
  font-size: 14px;
}

/* =========================================================
   9. 新闻列表 (News List)
   ========================================================= */
.news {
  padding: 100px 0;
}
.news-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
}
.news-feature {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--white);
  cursor: pointer;
  background: linear-gradient(to top,var(--theme-color),var(--primary-dark));
}
.news-feature-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}
.news-feature-overlay { width:100%;height:100%;position: relative; z-index: 2; background: rgba(0,0,0,0.5); border-radius: var(--radius-md); padding: 28px 32px; backdrop-filter: blur(2px); display: flex;flex-direction: column;justify-content: flex-end;}
.news-feature h3 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.news-feature p {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  line-height: 1.6;
  margin-bottom: 20px;
  max-width: 540px;
}
.news-feature-meta {
  display: flex;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.05em;
}
.news-feature-meta svg[data-ico] { color: var(--primary); width: 14px; height: 14px; margin-right: 4px; }

.news-side { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  display: flex;
  gap: 20px;
  padding: 20px;
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  transition: all 0.2s;
  cursor: pointer;
}
.news-item:hover {
  border-color: var(--primary);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}
.news-item-thumb {
  flex-shrink: 0;
  width: 120px;
  height: 88px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #0b1b33, #1b3a6b);
  position: relative;
  overflow: hidden;
}
.news-item-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, transparent 0 12px, rgba(255,255,255,0.1) 12px 13px);
}
.news-item-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.news-item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  display: inline-block;
}
.news-item-title img{
  display: inline-block;
}
.news-item-date {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gray-500);
  letter-spacing: 0.05em;
  margin-top: auto;
}


/* =========================================================
   10. 嘉宾列表 (Guests — horizontal scroll)
   ========================================================= */
.guests {
  padding: 100px 0;
}
.scroll-row {
  position: relative;
}
.scroll-row-track {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-behavior: smooth;
  padding: 8px 0 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--gray-300) transparent;
}
.scroll-row-track::-webkit-scrollbar { height: 6px; }
.scroll-row-track::-webkit-scrollbar-track { background: var(--gray-100); border-radius: 3px; }
.scroll-row-track::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }

.guest-card {
  flex: 0 0 260px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  transition: all 0.2s;
  cursor: pointer;
}
.guest-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.guest-avatar {
  width: 96px;
  height: 96px;
  margin: 0 auto 16px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  display: block;
  border: 3px solid var(--white);
  box-shadow: 0 4px 14px rgba(0,0,0,0.15);
}
.guest-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.guest-title {
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.5;
  min-height: 38px;
}
.guest-org {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 10px;
  background: rgba(30, 136, 255, 0.1);
  color: var(--primary-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  border-radius: var(--radius-xs);
}
.scroll-ctrl {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}
.scroll-ctrl button {
  width: 40px;
  height: 40px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: var(--dark);
  transition: all 0.2s;
}
.scroll-ctrl button:hover {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

/* =========================================================
   11. 系统新闻 (System News — title + date)
   ========================================================= */
.system-news {
  padding: 100px 0;
  color: var(--white);
  position: relative;
  overflow: hidden;
  background: var(--navy);
}
.system-news::before {
  content: 'SYSTEM';
  position: absolute;
  left: -40px;
  top: 30%;
  font-family: var(--font-display);
  font-size: 240px;
  font-weight: 800;
  color: rgba(255,255,255,0.025);
  letter-spacing: -0.05em;
  pointer-events: none;
}
.system-news .section-label { color: var(--primary-light); }
.system-news .section-title { color: var(--white); }
.system-news .section-subtitle { color: rgba(255,255,255,0.6); }

.sys-news-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.sys-news-row {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 22px 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  transition: all 0.2s;
  cursor: pointer;
}
.sys-news-row:hover {
  padding-left: 16px;
  background: rgba(255,255,255,0.03);
}
.sys-news-row:hover .sys-news-title { color: var(--primary-light); }
.sys-news-row:hover .sys-news-arrow { transform: translateX(4px); color: var(--primary); }

.sys-news-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  width: 32px;
  font-variant-numeric: tabular-nums;
}
.sys-news-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary-light);
  padding: 4px 10px;
  border: 1px solid rgba(30,136,255,0.4);
  border-radius: var(--radius-xs);
  min-width: 96px;
  text-align: center;
}
.sys-news-title {
  flex: 1;
  font-size: 16px;
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  transition: color 0.2s;
}
.sys-news-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  font-variant-numeric: tabular-nums;
}
.sys-news-arrow {
  color: rgba(255,255,255,0.4);
  font-size: 14px;
  transition: all 0.2s;
}

/* =========================================================
   12. 产品展区 (Products — horizontal scroll)
   ========================================================= */
.products {
  padding: 100px 0;
}
.product-card {
  flex: 0 0 320px;
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: all 0.2s;
  cursor: pointer;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.product-thumb {
  height: 200px;
  position: relative;
  overflow: hidden;
}
.product-thumb-bg {
  position: absolute;
  inset: 0;
}
.product-thumb-bg.p-1 { background: linear-gradient(135deg, #0b1b33 0%, #1e88ff 100%); }
.product-thumb-bg.p-2 { background: linear-gradient(135deg, #10264a 0%, #1b3a6b 100%); }
.product-thumb-bg.p-3 { background: linear-gradient(135deg, #1e88ff 0%, #0b1b33 100%); }
.product-thumb-bg.p-4 { background: linear-gradient(135deg, #0b1b33 0%, #1b3a6b 100%); }
.product-thumb-bg.p-5 { background: linear-gradient(135deg, #1e88ff 0%, #1565d8 100%); }
.product-thumb-bg.p-6 { background: linear-gradient(135deg, #1b3a6b 0%, #10264a 100%); }
.product-thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(135deg, transparent 0 24px, rgba(255,255,255,0.06) 24px 25px);
}
.product-thumb-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.95);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dark);
  font-weight: 600;
  border-radius: var(--radius-xs);
}
.product-thumb-num {
  position: absolute;
  right: 16px;
  bottom: 12px;
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 800;
  color: rgba(255,255,255,0.2);
  letter-spacing: -0.04em;
}
.product-body { padding: 20px; }
.product-cat {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 8px;
}
.product-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.product-desc {
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* =========================================================
   13. 参展企业 (Exhibitors — horizontal scroll)
   ========================================================= */
.exhibitors {
  padding: 100px 0;
}
.exhibitor-card {
  flex: 0 0 220px;
  height: 140px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px;
  transition: all 0.2s;
  cursor: pointer;
  text-align: center;
}
.exhibitor-card:hover {
  border-color: var(--primary);
  background: var(--navy);
  color: var(--white);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.exhibitor-card:hover .exhibitor-meta { color: rgba(255,255,255,0.5); }
.exhibitor-logo {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  color: var(--white);
}
.exhibitor-card:hover .exhibitor-logo { background: var(--white); color: var(--primary); }
.exhibitor-name {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: -0.01em;
}
.exhibitor-card:hover .exhibitor-name { color: var(--white); }
.exhibitor-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--gray-500);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* =========================================================
   14. 照片回顾 (Photo Review — horizontal scroll)
   ========================================================= */
.photos {
  padding: 100px 0;
}
.photo-card {
  flex: 0 0 360px;
  height: 240px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  transition: all 0.2s;
}
.photo-card:hover { transform: scale(1.02); }
.photo-card:hover .photo-overlay { opacity: 1; }
.photo-bg {
  position: absolute;
  inset: 0;
}
.photo-bg.ph-1 { background: linear-gradient(135deg, #1e88ff, #0b1b33 60%, #10264a); }
.photo-bg.ph-2 { background: linear-gradient(45deg, #0b1b33, #1e88ff); }
.photo-bg.ph-3 { background: linear-gradient(225deg, #10264a, #1e88ff 50%, #0b1b33); }
.photo-bg.ph-4 { background: radial-gradient(circle at 30% 30%, #1e88ff, #0b1b33); }
.photo-bg.ph-5 { background: linear-gradient(180deg, #0b1b33 0%, #10264a 50%, #1e88ff 100%); }
.photo-bg.ph-6 { background: conic-gradient(from 90deg, #0b1b33, #1e88ff, #0b1b33); }
.photo-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(135deg, transparent 0 18px, rgba(255,255,255,0.05) 18px 19px);
}
.photo-pattern {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}
.photo-pattern svg[data-ico] {
  width: 64px;
  height: 64px;
  color: rgba(255,255,255,0.15);
}
.photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(30,34,40,0.95), transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.2s;
}
.photo-overlay div { color: var(--white); }
.photo-overlay strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}
.photo-overlay span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.05em;
}

/* =========================================================
   15. 友情链接 (Friendly Links)
   ========================================================= */
.links {
  padding: 60px 0;
}
.links-head {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}
.links-head > .section-more { margin-left: auto; }
.links-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.links-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 14px;
  background: var(--primary);
  margin-right: 10px;
  vertical-align: middle;
}
.links-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gray-500);
  letter-spacing: 0.1em;
}
.link-card {
  flex: 0 0 200px;
  height: 80px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  transition: all 0.2s;
  cursor: pointer;
}
.link-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.link-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(30, 136, 255, 0.12);
  display: grid;
  place-items: center;
  color: var(--primary-dark);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}
.link-card:hover .link-icon { background: var(--primary); color: var(--white); }
.link-text { min-width: 0; }
.link-text strong {
  display: block;
  font-size: 13px;
  color: var(--dark);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.link-text span {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--gray-500);
  letter-spacing: 0.05em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* =========================================================
   16. 赞助商 (Sponsors — 分等级 logo 墙 / 图 2:1 / 无文字)
   ========================================================= */
.sponsors {
  position: relative;
  padding: 100px 0;
  overflow: hidden;
}
.sponsors .container { position: relative; z-index: 1; }

/* --- 等级分组 --- */
.sponsor-level { margin-top: 48px; }
.sponsor-level:first-of-type { margin-top: 40px; }

.sponsor-level-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.sponsor-level-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
  padding: 8px 16px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  background: rgba(11,27,51,0.02);
  color: var(--dark);
}
.sponsor-level-badge svg[data-ico] { width: 12px; height: 12px; }
.sponsor-level-line { flex: 1; height: 1px; background: var(--gray-200); }
.sponsor-level-count {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-500);
  white-space: nowrap;
}

/* 等级配色（徽章）——浅底区块，用深色文字保证可读性 */
.sponsor-level--diamond .sponsor-level-badge { color: #1565d8; border-color: rgba(21,101,216,0.42); background: rgba(21,101,216,0.09); }
.sponsor-level--platinum .sponsor-level-badge { color: #556880; border-color: rgba(85,104,128,0.38); background: rgba(85,104,128,0.08); }
.sponsor-level--gold .sponsor-level-badge { color: #96700a; border-color: rgba(150,112,10,0.42); background: rgba(150,112,10,0.10); }
.sponsor-level--silver .sponsor-level-badge { color: #79828f; border-color: rgba(121,130,143,0.38); background: rgba(121,130,143,0.08); }

/* --- logo 网格：等级越高，卡片越大 ---
   用 flex + flex-basis 控制每行个数，最后一行不满时自动居中（grid 做不到）。 */
.sponsor-level-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 16px;
}
.sponsor-level--diamond  .sponsor-logo { flex: 0 1 calc((100% - 3 * 16px) / 4); }
.sponsor-level--platinum .sponsor-logo { flex: 0 1 calc((100% - 4 * 16px) / 5); }
.sponsor-level--gold     .sponsor-logo { flex: 0 1 calc((100% - 5 * 16px) / 6); }
.sponsor-level--silver   .sponsor-logo { flex: 0 1 calc((100% - 7 * 16px) / 8); }

/* 2:1 图片卡（纯图，无文字） */
.sponsor-logo {
  display: block;
  position: relative;
  aspect-ratio: 2 / 1;
  background: var(--white);
  border: 1px solid var(--gray-200);
  box-shadow: 0 1px 2px rgba(11,27,51,0.05);
  overflow: hidden;
  border-radius: 5px;
  transition: transform .3s cubic-bezier(.22,1,.36,1),
              box-shadow .3s cubic-bezier(.22,1,.36,1),
              border-color .3s cubic-bezier(.22,1,.36,1);
}
.sponsor-logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.sponsor-logo:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 14px 30px rgba(11,27,51,0.16);
}

/* 赞助商区块响应式 */
@media (max-width: 900px) {
  .sponsors { padding: 72px 0; }
  .sponsor-level { margin-top: 38px; }
  .sponsor-level-head { flex-wrap: wrap; gap: 10px; }
  .sponsor-level-line { display: none; }
  .sponsor-level--diamond  .sponsor-logo,
  .sponsor-level--platinum .sponsor-logo { flex-basis: calc((100% - 1 * 16px) / 2); }
  .sponsor-level--gold     .sponsor-logo,
  .sponsor-level--silver   .sponsor-logo { flex-basis: calc((100% - 2 * 16px) / 3); }
}
@media (max-width: 560px) {
  .sponsors { padding: 56px 0; }
  .sponsor-level { margin-top: 32px; }
  .sponsor-level-grid { gap: 12px; }
  .sponsor-level-badge { font-size: 11px; padding: 7px 12px; }
  .sponsor-level--diamond  .sponsor-logo,
  .sponsor-level--platinum .sponsor-logo,
  .sponsor-level--gold     .sponsor-logo,
  .sponsor-level--silver   .sponsor-logo { flex-basis: calc((100% - 1 * 12px) / 2); }
}

/* =========================================================
   17. 联系我们 (Contact)
   ========================================================= */
.contact {
  padding: 30px;
  font-size: 14px;
  background: var(--navy);
  color: var(--white);
  text-align: center;
}

 /* 左侧广告 */
.adv-modal {
    position: fixed;
    top: 120px;
    border: 1px solid rgb(224, 224, 224);
    background: rgb(255, 255, 255);
    z-index: 3;
    right: 10px;
    width: 150px
}

/* ============================ Secondary pages ============================ */
/* Full-width page title banner right below the navbar: theme-color band with
   decorative circles on both sides. Title/subtitle live here (moved out of
   the section header); the breadcrumb sits above the title in soft white. */
.page-hero {
    position: relative;
    background: linear-gradient(120deg, var(--theme-color), var(--primary-darker));
    color: #fff;
    padding: 46px 0 42px;
    overflow: hidden;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero .ph-crumb {
    font-size: 13px; color: rgba(255,255,255,.75); margin-bottom: 12px;
}
.page-hero .ph-crumb a { color: rgba(255,255,255,.9); }
.page-hero .ph-crumb a:hover { color: #fff; }
.page-hero .ph-title {
    margin: 0; color: #fff;            /* explicit: antd reset colors h1 dark */
    font-size: 34px; font-weight: 700; line-height: 1.2;
    text-shadow: 0 4px 14px rgba(0,0,0,.15);
}
.page-hero .ph-sub { margin: 10px 0 0; font-size: 15px; color: rgba(255,255,255,.82); }
/* Decorative circles: outlined + filled pair on each side */
.ph-circle { position: absolute; border-radius: 50%; pointer-events: none; }
.ph-c1 { width: 260px; height: 260px; left: -90px;  top: -120px;    border: 2px solid rgba(255,255,255,.22); }
.ph-c2 { width: 150px; height: 150px; left: 70px;   bottom: -85px;  background: rgba(255,255,255,.10); }
.ph-c3 { width: 300px; height: 300px; right: -110px; bottom: -150px; border: 2px solid rgba(255,255,255,.22); }
.ph-c4 { width: 130px; height: 130px; right: 120px; top: -70px;     background: rgba(255,255,255,.10); }

.article-nav {
    display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 36px;
    padding-top: 28px; border-top: 1px solid var(--border-color);
}
.article-nav a {
    display: block; padding: 18px 22px; border: 1px solid var(--border-color);
    border-radius: var(--radius-md); background: #fff; transition: all .2s;
    text-decoration: none; color: inherit;
}
.article-nav a:hover { border-color: var(--theme-color); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.article-nav .label { font-size: 12px; color: var(--text-tertiary); margin-bottom: 6px; }
.article-nav .ttl { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.article-nav .next { text-align: right; }
@media (max-width: 640px) {
    .page-hero { padding: 32px 0 30px; }
    .page-hero .ph-title { font-size: 26px; }
    .page-hero .ph-sub { font-size: 14px; }
}


/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1024px) {
  .quick-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .deadline-grid { grid-template-columns: 1fr; }
  .welcome-grid { grid-template-columns: 1fr; gap: 40px; }
  .menu-list { display: none; }
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .quick-grid { grid-template-columns: 1fr;  }
  .countdown-inner { flex-direction: column; align-items: flex-start; }
  .timer-cell { min-width: 72px; padding: 14px 10px; }
  .timer-num { font-size: 32px; }
}

/* ---- 移动端细化 ---- */
@media (max-width: 768px) {
  /* 顶栏：仅保留语言切换与登录 */
  .topbar-left .topbar-info:last-child { display: none; }
  .topbar-inner { height: 44px; }
  .topbar-left { gap: 12px; }
  .topbar-right { gap: 10px; }
  .topbar-info { font-size: 11px; }
  .lang-switch button { padding: 3px 8px; font-size: 11px; }
  .topbar-right > span { display: none; }

  /* 菜单：移动端精简 */
  .menu-inner { height: 60px; }
  .menu-logo-text span { display: none; }
  .menu-actions .btn { padding: 8px 14px !important; font-size: 12px !important; }

  /* 通用标题 */
  .section-title { font-size: 28px; }
  .section-header { margin-bottom: 32px; }
  .section-subtitle { font-size: 14px; }

  /* 倒计时 */
  .countdown { padding: 48px 0; }
  .countdown-info h2 { font-size: 26px; }
  .timer { width: 100%; justify-content: space-between; gap: 8px; }
  .timer-cell { min-width: 0; flex: 1; padding: 12px 6px; }
  .timer-num { font-size: 28px; }
  .timer-label { font-size: 9px; letter-spacing: 0.12em; }

  /* 快捷入口 */
  .quick { padding: 30px 0; }
  .quick-btn { padding: 16px 18px; gap: 14px; }
  .quick-btn-icon { width: 40px; height: 40px; font-size: 16px; }
  .quick-btn-name { font-size: 15px; }

  /* 截止日期 */
  .deadline { padding: 48px 0; }
  .deadline-card { padding: 24px; min-height: 170px; }
  .deadline-title { font-size: 17px; }
  .deadline-date .day { font-size: 56px; }
  .deadline-date .month { font-size: 22px; }
  .deadline-date .year { font-size: 15px; padding-bottom: 5px; }

  /* 轮播 */
  .carousel { padding: 56px 0; }
  .carousel-arrow { width: 40px; height: 40px; font-size: 14px; }
  .carousel-arrow.prev { left: 12px; }
  .carousel-arrow.next { right: 12px; }

  /* 欢迎词 */
  .welcome { padding: 56px 0; }
  .welcome-head { margin-bottom: 32px; }
  .welcome-grid { gap: 28px; }
  .welcome-image { min-height: 320px; }
  .welcome-head h2 { font-size: 28px; }
  .welcome-content .rich-body { font-size: 15px; }
  .welcome-signature { flex-direction: column; align-items: flex-start; }
  .welcome-signature-meta { text-align: left; }

  /* 新闻 */
  .news { padding: 56px 0; }
  .news-feature h3 { font-size: 22px; }
  .news-item-thumb { width: 88px; height: 68px; }

  /* 嘉宾 / 产品 / 滚动模块 */
  .guests, .products, .exhibitors, .photos { padding: 56px 0; }
  .guest-card { flex: 0 0 200px; padding: 16px; }
  .guest-avatar { width: 72px; height: 72px; font-size: 24px; margin-bottom: 12px; }
  .guest-name { font-size: 16px; }
  .guest-title { font-size: 12px; min-height: 34px; }
  .product-card { flex: 0 0 240px; }
  .product-thumb { height: 150px; }
  .exhibitor-card { flex: 0 0 150px; height: 120px; }
  .photo-card { flex: 0 0 260px; height: 180px; }
  .link-card { flex: 0 0 170px; }

  /* 系统新闻 */
  .system-news { padding: 56px 0; }
  .sys-news-row { gap: 12px; padding: 16px 4px; flex-wrap: wrap; }
  .sys-news-index { display: none; }
  .sys-news-tag { min-width: 0; font-size: 10px; padding: 3px 8px; }
  .sys-news-title { flex-basis: 100%; order: 3; font-size: 14px; }
  .sys-news-date { margin-left: auto; font-size: 11px; }

  /* 友情链接 */
  .links { padding: 40px 0; }

  /* 联系我们 */
  .contact { padding: 20px 0; }
}

@media (max-width: 420px) {
}

/* =========================================================
   移动端 / 平板：下拉式导航（覆盖 769–1024px 菜单被隐藏的问题）
   放在样式表末尾，确保优先级高于前面的断点
   ========================================================= */
@media (max-width: 1024px) {
  .menu-burger { display: flex; }
  .menu-cta { display: none; }
  .menu-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 12px 28px rgba(20, 24, 30, 0.14);
    padding: 6px 0;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    z-index: 120;
  }
  .menu-toggle-cb:checked ~ .menu-list { display: flex; }
  .menu-list li { border-bottom: 1px solid var(--gray-100); }
  .menu-list li:last-child { border-bottom: none; }
  .menu-list a { padding: 14px 22px; font-size: 15px; color: #222;}
  .menu-list a::after { display: none; }

  /* 移动端：二级菜单展开为内联列表 */
  .menu-trigger { padding: 14px 22px; font-size: 15px; color: #222; justify-content: space-between; cursor: pointer; }
  /* 移动端：二级菜单改为点击展开/收起（默认收起，点击触发项展开）
     面板用「导航底色 + 半透明黑遮罩」呈现（半透明会叠在 .menu-list 的导航背景色之上）：
       · 浅色导航(白底深字) → 面板变成浅灰，深字依然清晰
       · 深色/高饱和导航(红底白字等) → 面板变成同色系的更深色，白字依然清晰
     文字显式使用导航文字色，并用更高优先级 + !important 钉死，
     避免被主题注入的 `.menu-nav .menu-list li a` 规则干扰而出现「白字白底」。 */
  .menu-list > li.has-dropdown:hover > .menu-trigger { color: var(--theme-color); }
  .menu-nav .menu-list .menu-dropdown {
    position: static;
    transform: none;
    min-width: 0;
    width: 100%;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border-radius: 0;
    padding: 4px 0;
    background: rgba(0, 0, 0, 0.03);
    display: none;
  }
  /* 抵消桌面下拉的 :hover 位移：触屏点按会让 :hover「粘滞」，
     使 .menu-dropdown 套用桌面规则的 transform: translate(-50%, 0)，
     在 position: static 下被水平位移半个身位而错位。移动端一律归零。 */
  .menu-list > li.has-dropdown:hover > .menu-dropdown { transform: none; }
  .has-dropdown .sub-toggle-cb:checked ~ .menu-dropdown { display: block; }
  .has-dropdown .sub-toggle-cb:checked ~ .menu-trigger svg { transform: rotate(180deg); }
  .menu-nav .menu-list .menu-dropdown li { border-bottom-color: rgba(128, 128, 128, 0.25); }
  .menu-nav .menu-list .menu-dropdown li a {
    padding: 12px 22px 12px 38px;
    font-size: 14px;
    color: #222!important;
  }
  .menu-nav .menu-list .menu-dropdown li a:hover {
    color: var(--web-nav-font-active-color, #0372a4) !important;
    background: rgba(0, 0, 0, 0.06);
  }
}
@media (max-width: 420px) {
  .menu-actions .btn { padding: 8px 12px !important; font-size: 11px !important; }
}

/* =========================================================
   栏目「更多」按钮：窄屏改为常规文档流，避免与标题重叠
   放在末尾以确保优先级
   ========================================================= */
@media (max-width: 900px) {
  .section-header.has-more { padding-right: 0; }
  .section-header > .section-more {
    position: static;
    margin-top: 22px;
  }
  .section-header.center > .section-more {
    display: flex;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
  }
}

/* =====================================================================
   c22 改造补充样式（对齐 c21 多文件 PHP 结构 + 16 条规则）
   ===================================================================== */

/* 规则2：hero 1920x500 媒体层 */
.hero-media { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0; }

/* 规则4：quick 不足 3 个时铺满（默认 3 列见原 .quick-grid）。
   用户判断：给 .quick-grid 加 .quick-grid--fill 即可在不满足 3 个时铺满。 */
.quick-grid--fill { grid-template-columns: repeat(auto-fit, minmax(0, 1fr)); }

/* 规则6：news 右侧三条 16:9 缩略图 */
.news-item-thumb { width:160px; height:auto; aspect-ratio:16/9; border-radius:var(--radius-sm); overflow:hidden; background:#0b1b33; position:relative; }
.news-item-thumb img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; display:block; }
.news-item-thumb::after { display:none; }

/* 规则7：welcome 占位图 */
.welcome-image-img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0; }
.welcome-image-badge { z-index:1; }

/* 规则8：exhibitor-card 仅一张图（cover） */
.exhibitor-card { display:block; padding:0; overflow:hidden; }
.exhibitor-img { width:100%; height:100%; max-height:none; object-fit:cover; display:block; }

/* 规则9：link-card 仅一张图（cover） */
.link-card { padding:0; overflow:hidden; }
.link-img { width:100%; height:100%; max-height:none; object-fit:cover; display:block; }

/* 规则10：product-thumb 内图片（cover） */
.product-thumb-img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0; }

/* 规则11：photo-card 仅一张图（cover） */
.photo-img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; display:block; }

/* 子页面（body-layout.php / sponsors.php）样式 —— 结构参考 c21 */
.ph-crumb { font-size:13px; opacity:.7; margin-bottom:12px; }
.ph-crumb a { color:#fff; }
.ph-title { font-family:var(--font-display); font-size:34px; font-weight:800; letter-spacing:-0.02em; }
.sub-section { padding:60px 0; background:var(--gray-50); min-height:50vh; }
.news-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.news-grid.news-sub-grid { grid-template-columns:repeat(3,1fr); }
.news-card { background:#fff; border:1px solid var(--gray-200); border-radius:var(--radius-md); overflow:hidden;transition:transform .3s ease-in-out; }
.news-card:hover{transform:translate(-0, -5px);}
.news-card .cover { width:100%; aspect-ratio:16/9; background-size:cover; background-position:center; }
.news-card .body { padding:18px; }
.news-card .meta { font-size:12px; color:var(--gray-500); margin-bottom:8px; }
.news-card h4 { font-size:16px; font-weight:700; color:var(--dark); line-height:1.4; }
.list-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:20px; }
.scroller-card { background:#fff; border:1px solid var(--gray-200); border-radius:var(--radius-md); overflow:hidden;transition:transform .3s ease-in-out; }
.scroller-card:hover{transform:translate(-0, -5px);}
.scroller-card .pic { width:100%; aspect-ratio:16/9; background-size:cover; background-position:center; }
.scroller-card .body { padding:16px; }
.scroller-card h5 { font-size:15px; font-weight:600; color:var(--dark); }

/* 子页面嘉宾列表（body-layout type=3）：与首页 Speakers 卡片完全一致，PC 一行 4 个，移动端自适应 */
.guest-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.guest-grid .guest-card {
  flex: initial;            /* 覆盖首页 flex:0 0 260px，作为网格项正常铺满单元格 */
  width: 100%;
}
@media (max-width: 1024px) {
  .guest-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .guest-grid { grid-template-columns: 1fr; }
}
/* 赞助商墙（body-layout type=9）已改用 .sponsor-level，与首页 .sponsors 区块共用同一套样式；
   旧 .sponsor-tier / .sponsor-grid 规则已移除，.sponsor-logo 由上方 .sponsors 区块统一定义 */

@media (max-width: 980px) { .news-grid { grid-template-columns:repeat(2,1fr); } }
@media (max-width: 640px) { .news-grid { grid-template-columns:1fr; } .news-item-thumb { width:120px; } }



/* 横向滚动模块：原生滚动 + scroll-snap + 左右箭头切换 */
.scroll-row-track { scroll-snap-type: x mandatory; }
.guest-card, .product-card, .exhibitor-card, .photo-card, .link-card { scroll-snap-align: start; }

/* 箭头按钮禁用态（已到最左 / 最右） */
.scroll-ctrl button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  background: transparent;
  color: var(--dark);
  border-color: var(--gray-200);
}
.scroll-ctrl button:disabled:hover {
  background: transparent;
  color: var(--dark);
  border-color: var(--gray-200);
}

/* 移动端菜单：CSS-only checkbox 切换（无 JS） */
.menu-toggle-cb { display: none; }
/* 菜单图标：默认显示「开」，选中后切换为「关」 */
.menu-burger-open { display: block; }
.menu-burger-close { display: none; }
.menu-toggle-cb:checked ~ .menu-actions .menu-burger .menu-burger-open { display: none; }
.menu-toggle-cb:checked ~ .menu-actions .menu-burger .menu-burger-close { display: block; }

/* 冗余装饰层：图片已覆盖，关闭以免压暗 */
.welcome-image::before { display: none; }
.product-thumb::before { display: none; }