/* AI4Fusion 2027 前台样式：参考 31会议 会议站版式（白色页头 + 蓝色导航通栏 + 通栏主视觉 + 居中蓝色标题） */
:root {
  --primary: #2061e6;
  --primary-dark: #174cbc;
  --primary-dark: color-mix(in srgb, var(--primary) 78%, #000);
  --primary-soft: #eaf1fe;
  --primary-soft: color-mix(in srgb, var(--primary) 9%, #fff);
  --title: #2c82c9;
  --th: #6db6ff;
  --text: #262626;
  --muted: #6b7280;
  --line: #e3e7ee;
  --gray: #f2f3f5;
  --bg-alt: #f6f8fc;
  --plasma: #ff5a6e;
  --ai: #36c5f0;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
  --num: "DIN Alternate", "Bahnschrift", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --wrap: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 140px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: #fff; color: var(--text); font: 16px/1.8 var(--sans); -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.35; margin: 0; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 4px; }
[hidden] { display: none !important; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--primary); color: #fff; padding: 8px 14px; border-radius: 4px; }
.skip:focus { left: 12px; }
.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }

/* ---------- 页头 + 导航通栏 ---------- */
.masthead { position: sticky; top: 0; z-index: 50; background: #fff; box-shadow: 0 2px 10px rgba(16, 40, 90, .08); }
.header__inner { height: 72px; display: flex; align-items: center; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; text-decoration: none; }
.brand__logo { height: 48px; width: auto; }
.brand__text { display: flex; flex-direction: column; line-height: 1.3; min-width: 0; }
.brand__text b { font-family: var(--num); font-size: 20px; color: var(--primary); letter-spacing: .01em; }
.brand__text small { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.header__actions { margin-left: auto; display: flex; align-items: center; gap: 10px; flex: none; }
.lang-switch { display: inline-flex; align-items: center; height: 36px; padding: 0 14px; border: 1px solid var(--line); border-radius: 4px; text-decoration: none; font-size: 14px; color: var(--text); }
.lang-switch:hover { border-color: var(--primary); color: var(--primary); }
.navtoggle { display: none; height: 36px; padding: 0 12px; border: 1px solid var(--line); background: #fff; border-radius: 4px; font: inherit; font-size: 14px; color: var(--text); cursor: pointer; }

.navbar { background: var(--primary); background-image: linear-gradient(90deg, var(--primary-dark), var(--primary) 30%, var(--primary) 70%, var(--primary-dark)); }
.navbar__inner { display: flex; flex-wrap: wrap; }
.navbar a { display: block; height: 54px; line-height: 54px; padding: 0 18px; color: rgba(255, 255, 255, .88); font-size: 17px; text-decoration: none; white-space: nowrap; transition: background .2s, color .2s; position: relative; }
.lang-en .navbar a { font-size: 15px; padding: 0 13px; }
.navbar a:hover, .navbar a.is-active { color: #fff; background: rgba(255, 255, 255, .14); }
.navbar a.is-active::after { content: ""; position: absolute; left: 18px; right: 18px; bottom: 0; height: 3px; background: #fff; border-radius: 3px 3px 0 0; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 36px; padding: 0 18px; border-radius: 4px; border: 1px solid transparent; font: inherit; font-size: 15px; text-decoration: none; cursor: pointer; transition: background .2s, box-shadow .2s, transform .2s; white-space: nowrap; }
.btn--primary { background: var(--primary); color: #fff; }
.btn--primary:hover { background: var(--primary-dark); }
.btn--light { background: #fff; color: var(--primary); }
.btn--light:hover { box-shadow: 0 6px 18px rgba(0, 0, 0, .18); }
.btn--outline { color: #fff; border-color: rgba(255, 255, 255, .7); }
.btn--outline:hover { background: rgba(255, 255, 255, .12); }
.btn--lg { height: 46px; padding: 0 30px; font-size: 17px; border-radius: 23px; }
.btn--small { height: 34px; padding: 0 16px; font-size: 14px; background: var(--primary); color: #fff; }
.btn--small:hover { background: var(--primary-dark); }
.is-pending { position: relative; cursor: not-allowed; }
.btn--primary.is-pending, .btn--primary.is-pending:hover { background: #a7bff0; }
.btn--light.is-pending, .btn--light.is-pending:hover { background: rgba(255, 255, 255, .62); box-shadow: none; }
.btn--outline.is-pending, .btn--outline.is-pending:hover { background: none; color: rgba(255, 255, 255, .6); border-color: rgba(255, 255, 255, .4); }

/* 悬停提示（暂不可点的按钮） */
[data-tip]::after {
  content: attr(data-tip); position: absolute; left: 50%; top: calc(100% + 8px); z-index: 60;
  padding: 6px 12px; border-radius: 4px; background: rgba(17, 24, 39, .92); color: #fff;
  font-size: 13px; font-weight: 400; line-height: 1.4; letter-spacing: 0; white-space: nowrap;
  opacity: 0; pointer-events: none; transform: translate(-50%, -4px); transition: opacity .15s, transform .15s;
}
[data-tip]:hover::after, [data-tip]:focus-visible::after { opacity: 1; transform: translate(-50%, 0); }
.more { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); text-decoration: none; }
.more:hover { text-decoration: underline; }

/* ---------- 主视觉 ---------- */
.banner { position: relative; overflow: hidden; color: #fff; text-align: center; background: #0d2a8c; }
.banner:not(.banner--image) {
  background:
    radial-gradient(640px 420px at 82% 46%, rgba(255, 110, 120, .22), transparent 64%),
    radial-gradient(560px 380px at 13% 48%, rgba(54, 197, 240, .2), transparent 64%),
    radial-gradient(900px 480px at 50% 125%, rgba(122, 92, 255, .4), transparent 62%),
    linear-gradient(120deg, #06123a 0%, #0b2a86 42%, #1747c9 72%, #2a63f2 100%);
}
.banner:not(.banner--image)::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, .06) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .06) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 72%);
  mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 72%);
}
.banner__fx { position: absolute; inset: 0; width: 100%; height: 100%; display: block; pointer-events: none; }
.banner__inner { position: relative; z-index: 1; padding: 70px 0 128px; }
/* 文字后方加一层柔和暗晕，保证动效背景上的文字清晰 */
.banner:not(.banner--image) .banner__inner::before { content: ""; position: absolute; left: 50%; top: 46%; z-index: -1; width: min(980px, 100%); height: 86%; transform: translate(-50%, -50%); background: radial-gradient(closest-side, rgba(6, 18, 58, .55), rgba(6, 18, 58, .25) 60%, transparent); pointer-events: none; }
.banner--image .banner__inner { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; padding-bottom: 110px; }
.banner__img img { width: 100%; height: auto; }
.banner__tags { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin: 0 0 18px; font-size: 14px; letter-spacing: .1em; }
.banner__tags span { padding: 2px 14px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .45); background: rgba(255, 255, 255, .08); }
.banner__tags span:first-child { background: linear-gradient(90deg, #ffb35c, #ff5a6e); border-color: transparent; font-weight: 600; }
.banner__title { font-size: clamp(28px, 4vw, 50px); font-weight: 700; letter-spacing: .04em; text-shadow: 0 4px 18px rgba(0, 20, 80, .45); }
.banner__title span { display: block; }
.lang-en .banner__title { font-family: var(--num); font-size: clamp(38px, 5.4vw, 64px); letter-spacing: .02em; }
.banner__sub { margin: 14px auto 0; max-width: 46em; font-family: var(--num); font-size: clamp(14px, 1.5vw, 18px); font-weight: 600; letter-spacing: .02em; opacity: .92; line-height: 1.5; }
.banner__facts { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px 26px; margin: 22px 0 0; font-size: 16px; }
.banner__facts div { display: flex; gap: 8px; align-items: baseline; }
.banner__facts dt { opacity: .75; font-size: 14px; }
.banner__facts dd { margin: 0; font-weight: 600; }
.banner__actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; margin-top: 28px; }

/* 倒计时（叠在主视觉底部） */
.countdown { position: absolute; z-index: 1; left: 0; right: 0; bottom: 0; padding: 16px 0 20px; display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 8px 10px; font-size: 20px; background: linear-gradient(transparent, rgba(6, 18, 70, .45)); }
.countdown__label { margin-right: 6px; font-size: 22px; letter-spacing: .1em; }
.countdown__cells { display: flex; align-items: center; gap: 8px; }
.countdown__cells span { display: flex; align-items: center; gap: 8px; }
.countdown__cells b { min-width: 62px; padding: 2px 8px; font-family: var(--num); font-size: 34px; font-weight: 600; line-height: 1.3; background: rgba(255, 255, 255, .16); border: 1px solid rgba(255, 255, 255, .25); border-radius: 6px; font-variant-numeric: tabular-nums; }
.countdown__done { font-weight: 600; }

/* 关键日期卡片 */
.keydates { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin: 28px 0 8px; padding: 18px 0; background: var(--gray); border-radius: 6px; }
.keydates__item { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; padding: 4px 12px; text-align: center; }
.keydates__item + .keydates__item { border-left: 1px solid #c9ced6; }
.keydates__item span { font-size: 15px; color: #333; }
.keydates__item b { font-family: var(--num); font-size: 21px; color: var(--title); }

/* ---------- 首页内容区块 ---------- */
.block { padding: 52px 0 24px; }
.block--tint { background: var(--bg-alt); padding-bottom: 52px; margin-top: 28px; }
.block__title, .rich h2 { position: relative; margin: 0 0 30px; text-align: center; color: var(--title); font-size: 26px; font-weight: 700; padding-bottom: 14px; }
.block__title::after, .rich h2::after { content: ""; position: absolute; left: 50%; bottom: 0; width: 40px; height: 3px; margin-left: -20px; border-radius: 3px; background: var(--primary); }
.block__more { text-align: center; margin-top: 8px; }

/* 时间轴 */
.timeline { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.timeline li { position: relative; padding: 28px 12px 0 0; border-top: 2px solid #cfd8e6; }
.timeline li::before { content: ""; position: absolute; top: -9px; left: 0; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 2px solid #b7c3d6; }
.timeline time { display: block; font-family: var(--num); font-weight: 700; font-size: 16px; }
.timeline span { display: block; margin-top: 4px; font-size: 14px; color: var(--muted); line-height: 1.6; }
.timeline .is-key time { color: var(--title); }
.timeline .is-key::before { border-color: var(--title); }
.timeline .is-done { border-top-color: var(--primary); }
.timeline .is-done::before { background: var(--primary); border-color: var(--primary); }
.timeline .is-done time, .timeline .is-done span { color: #9aa3b2; }
.timeline .is-next::before { background: var(--plasma); border-color: var(--plasma); box-shadow: 0 0 0 5px rgba(255, 90, 110, .2); }
.timeline .is-next time { color: var(--plasma); }

/* 首页 Logo 墙 */
.logos { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 18px 28px; }
.logos__group { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 18px 28px; }
.logos img { max-height: 56px; width: auto; }

/* ---------- 栏目页 ---------- */
.pagehead { position: relative; overflow: hidden; color: #fff; text-align: center; padding: 46px 0 42px; background: radial-gradient(500px 220px at 85% 0%, rgba(80, 180, 255, .45), transparent 65%), radial-gradient(420px 220px at 10% 100%, rgba(255, 90, 160, .3), transparent 60%), linear-gradient(120deg, #0a1f78, #1442c8 45%, #2367f0 75%, #3a5bff); }
.pagehead h1 { font-size: clamp(26px, 3vw, 36px); letter-spacing: .06em; }
.lang-en .pagehead h1 { letter-spacing: .01em; }
.crumbs { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-bottom: 6px; font-size: 13px; opacity: .85; }
.crumbs a { text-decoration: none; }
.crumbs a:hover { text-decoration: underline; }
.crumbs a + a::before { content: "/"; margin-right: 8px; opacity: .6; }
.section--page { padding: 44px 0 72px; }
.page-grid { max-width: 1000px; margin-inline: auto; }
.empty { color: var(--muted); padding: 32px 0; text-align: center; }
.back { margin-top: 32px; text-align: center; }

/* ---------- 正文排版（后台编辑器内容） ---------- */
.rich { font-size: 16px; line-height: 2; }
.rich > :first-child { margin-top: 0; }
.rich p { margin: 0 0 1em; }
.lang-zh .rich > p:not(.note) { text-indent: 2em; text-align: justify; }
.rich h2 { margin-top: 48px; }
.rich > h2:first-child { margin-top: 0; }
.rich h3 { margin: 1.6em 0 .6em; font-size: 18px; color: var(--text); padding-left: 12px; border-left: 4px solid var(--primary); line-height: 1.4; }
.rich ul, .rich ol { margin: 0 0 1.2em; padding-left: 2em; }
.rich li { margin: .2em 0; }
.rich a { color: var(--primary); }
.rich img { height: auto; margin: 1em auto; }
.rich blockquote { margin: 1.2em 0; padding: 12px 18px; background: var(--bg-alt); border-left: 4px solid var(--primary); }
.rich .note { color: var(--muted); font-size: 14px; text-align: center; }
.rich .table-wrap { overflow-x: auto; margin: 0 0 1.4em; }
.rich table { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.7; background: #fff; }
.rich th, .rich td { padding: 10px 14px; border: 1px solid #9fb6d3; text-align: center; vertical-align: middle; }
.rich thead th { background: var(--th); color: var(--text); font-weight: 600; }
.rich .table-info th { width: 9em; background: var(--primary-soft); font-weight: 600; white-space: nowrap; }
.rich .table-info td { text-align: left; }
.lang-en .rich .table-info th { width: 14em; white-space: normal; }

/* 历届会议 */
.rich .editions { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); position: relative; margin: 8px 0 1.6em; }
.rich .editions::before { content: ""; position: absolute; left: 7px; right: 7px; top: 7px; height: 2px; background: linear-gradient(90deg, #cfd8e6, #cfd8e6 82%, var(--primary)); }
.rich .editions li { position: relative; margin: 0; padding-top: 24px; display: flex; flex-direction: column; font-size: 14px; line-height: 1.6; color: var(--muted); font-family: var(--num); }
.rich .editions li::before { content: ""; position: absolute; top: 0; left: 0; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 2px solid #b7c3d6; }
.rich .editions strong { color: var(--text); font-family: var(--sans); font-size: 16px; }
.rich .editions li:last-child::before { background: var(--primary); border-color: var(--primary); box-shadow: 0 0 0 4px rgba(32, 97, 230, .18); }
.rich .editions li:last-child strong { color: var(--primary); }

/* 委员名单 */
.rich .people { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px 14px; }
.rich .people li { margin: 0; padding: 10px 14px; background: var(--bg-alt); border: 1px solid #e1e8f3; border-radius: 6px; font-size: 14px; color: var(--muted); line-height: 1.6; }
.rich .people strong { display: block; color: var(--text); font-size: 16px; }

/* 正文目录（长页面，宽屏显示） */
.toc { display: none; }
@media (min-width: 1240px) {
  .page-grid.has-toc { max-width: none; display: grid; grid-template-columns: 180px minmax(0, 1000px); gap: 40px; justify-content: center; }
  .toc { display: block; position: sticky; top: 150px; align-self: start; font-size: 14px; border-left: 2px solid var(--line); }
  .toc a { display: block; padding: 5px 0 5px 14px; margin-left: -2px; border-left: 2px solid transparent; color: var(--muted); text-decoration: none; }
  .toc a:hover, .toc a.is-active { color: var(--primary); border-left-color: var(--primary); }
}

/* 收款信息 */
.pay { margin-top: 44px; }
.pay h2 { position: relative; margin: 0 0 26px; text-align: center; color: var(--title); font-size: 26px; padding-bottom: 14px; }
.pay h2::after { content: ""; position: absolute; left: 50%; bottom: 0; width: 40px; height: 3px; margin-left: -20px; border-radius: 3px; background: var(--primary); }
.pay__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.pay__card { background: var(--bg-alt); border: 1px solid #e1e8f3; border-radius: 8px; padding: 22px 24px; }
.pay__card h3 { font-size: 17px; margin-bottom: 12px; color: var(--primary); }
.pay__list { margin: 0; }
.pay__list div { display: flex; gap: 14px; padding: 7px 0; border-bottom: 1px dashed #d3dceb; }
.pay__list div:last-child { border-bottom: 0; }
.pay__list dt { flex: none; width: 6.5em; color: var(--muted); }
.pay__list dd { margin: 0; font-weight: 600; word-break: break-all; }
.pay__no { font-family: var(--num); letter-spacing: .04em; }
.pay__qr { text-align: center; }
.pay__qr img { width: 200px; max-width: 100%; margin: 4px auto 10px; }
.pay__qr p { margin: 0; font-size: 14px; color: var(--muted); }
.pay__note { margin-top: 18px; padding: 14px 18px; background: #fff8e6; border: 1px solid #f5e2b3; border-radius: 8px; font-size: 15px; }

/* 资料下载 */
.files { list-style: none; margin: 24px 0 0; padding: 0; border-top: 1px solid var(--line); }
.file { display: flex; align-items: center; gap: 16px; padding: 16px 6px; border-bottom: 1px solid var(--line); }
.file__ext { flex: none; width: 48px; height: 48px; display: grid; place-items: center; border-radius: 6px; background: var(--primary-soft); color: var(--primary); font-family: var(--num); font-size: 13px; font-weight: 700; }
.file__main { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.6; }
.file__title { font-weight: 600; text-decoration: none; }
.file__title:hover { color: var(--primary); }
.file__meta { font-size: 13px; color: var(--muted); font-family: var(--num); }

/* 相册 */
.rich--intro { max-width: 1000px; margin: 0 auto 28px; }
.albums { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 22px; }
.album { display: flex; flex-direction: column; text-decoration: none; background: #fff; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; transition: transform .25s, box-shadow .25s; }
.album:hover { transform: translateY(-3px); box-shadow: 0 14px 30px -16px rgba(16, 40, 90, .35); }
.album__cover { aspect-ratio: 4 / 3; background: linear-gradient(120deg, #1442c8, #3a5bff); }
.album__cover img { width: 100%; height: 100%; object-fit: cover; }
.album__title { padding: 12px 16px 0; font-weight: 600; }
.album__meta { padding: 0 16px 12px; font-size: 13px; color: var(--muted); }
.photos { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.photo { position: relative; display: block; aspect-ratio: 4 / 3; border-radius: 6px; overflow: hidden; background: var(--gray); }
.photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.photo:hover img { transform: scale(1.04); }
.photo__caption { position: absolute; left: 0; right: 0; bottom: 0; padding: 18px 12px 8px; font-size: 13px; color: #fff; background: linear-gradient(transparent, rgba(0, 0, 0, .6)); }
.lightbox { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; background: rgba(5, 10, 25, .94); }
.lightbox figure { margin: 0; max-width: calc(100% - 120px); text-align: center; }
.lightbox img { max-height: 84vh; width: auto; margin: 0 auto; border-radius: 4px; }
.lightbox figcaption { margin-top: 10px; color: #c9d2e3; font-size: 14px; }
.lightbox button { position: absolute; background: none; border: 0; color: #fff; font-size: 44px; line-height: 1; cursor: pointer; padding: 10px 16px; opacity: .8; }
.lightbox button:hover { opacity: 1; }
.lightbox__close { top: 10px; right: 10px; }
.lightbox__prev { left: 6px; top: 50%; transform: translateY(-50%); }
.lightbox__next { right: 6px; top: 50%; transform: translateY(-50%); }

/* 404 */
.notfound { padding: 100px 0 120px; text-align: center; }
.notfound__code { margin: 0; font-family: var(--num); font-size: 96px; font-weight: 700; line-height: 1; color: var(--primary); }
.notfound h1 { margin: 16px 0 8px; }
.notfound p { color: var(--muted); margin: 0 0 28px; }

/* ---------- 页脚 ---------- */
.partners-bar { padding: 30px 0; border-top: 1px solid var(--line); }
.footer { background: var(--primary); background-image: linear-gradient(90deg, var(--primary-dark), var(--primary) 30%, var(--primary) 70%, var(--primary-dark)); color: rgba(255, 255, 255, .85); padding: 30px 0 26px; font-size: 14px; line-height: 1.9; text-align: center; }
.footer p { margin: 0; }
.footer__name { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 6px !important; }
.footer__group { display: flex; justify-content: center; flex-wrap: wrap; column-gap: 12px; }
.footer__label { color: #fff; }
.footer__label::after { content: "："; }
.lang-en .footer__label::after { content: ":"; }
.footer__contact { display: flex; justify-content: center; flex-wrap: wrap; gap: 4px 24px; margin-top: 6px !important; }
.footer__contact a { color: #fff; text-decoration: none; }
.footer__copy { margin-top: 14px !important; padding-top: 12px; border-top: 1px solid rgba(255, 255, 255, .18); font-size: 13px; display: flex; justify-content: center; flex-wrap: wrap; gap: 4px 18px; }
.footer__copy a { text-decoration: none; }
.footer__copy a:hover { color: #fff; }

/* 回到顶部 */
.totop { position: fixed; right: 20px; bottom: 28px; z-index: 40; width: 52px; height: 52px; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 0; border-radius: 8px; background: #fff; color: var(--text); box-shadow: 0 4px 16px rgba(16, 40, 90, .16); font: inherit; font-size: 11px; line-height: 1.2; cursor: pointer; opacity: 0; transform: translateY(10px); pointer-events: none; transition: opacity .25s, transform .25s; }
.totop.is-show { opacity: 1; transform: none; pointer-events: auto; }
.totop:hover { color: var(--primary); }
.totop svg { width: 20px; height: 20px; margin-bottom: 2px; }

/* 主视觉文字入场 */
@media (prefers-reduced-motion: no-preference) {
  .banner__inner > * { animation: rise .8s cubic-bezier(.2, .7, .2, 1) both; }
  .banner__inner > :nth-child(2) { animation-delay: .06s; }
  .banner__inner > :nth-child(3) { animation-delay: .12s; }
  .banner__inner > :nth-child(4) { animation-delay: .18s; }
  .banner__inner > :nth-child(5) { animation-delay: .24s; }
}
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
  html { scroll-padding-top: 76px; }
  .navtoggle { display: inline-flex; align-items: center; }
  .navbar { display: none; }
  .navbar.is-open { display: block; }
  .navbar__inner { flex-direction: column; padding: 6px 0 10px; }
  .navbar a, .lang-en .navbar a { height: 46px; line-height: 46px; font-size: 16px; padding: 0 12px; }
  .navbar a.is-active::after { left: 0; right: auto; top: 12px; bottom: 12px; width: 3px; height: auto; border-radius: 0 3px 3px 0; }
  .header__btn { display: none; }
}
@media (max-width: 1060px) {
  .timeline { grid-template-columns: 1fr; border-left: 2px solid #cfd8e6; margin-left: 8px; }
  .timeline li { border-top: 0; padding: 0 0 20px 26px; }
  .timeline li::before { top: 5px; left: -9px; }
  .timeline .is-done { border-top: 0; }
  .timeline time, .timeline span { display: inline; margin: 0 12px 0 0; }
}
@media (max-width: 760px) {
  .header__inner { height: 60px; }
  .brand__logo { height: 38px; }
  .brand__text b { font-size: 17px; }
  .brand__text small { display: none; }
  .banner__inner { padding: 44px 0 112px; }
  .banner__title { font-size: 6.1vw; letter-spacing: 0; }
  .lang-en .banner__title { font-size: 10vw; }
  .banner--image .banner__inner { position: relative; background: #0d2a8c; padding: 32px 0 100px; }
  .banner__facts { flex-direction: column; align-items: center; gap: 2px; }
  .countdown { font-size: 15px; gap: 6px; }
  .countdown__label { width: 100%; font-size: 15px; margin: 0; }
  .countdown__cells { gap: 4px; }
  .countdown__cells span { gap: 4px; }
  .countdown__cells b { min-width: 44px; font-size: 24px; padding: 0 6px; }
  .keydates { grid-template-columns: 1fr 1fr; padding: 6px 0; }
  .keydates__item { padding: 12px 8px; }
  .keydates__item + .keydates__item { border-left: 0; }
  .keydates__item:nth-child(even) { border-left: 1px solid #c9ced6; }
  .keydates__item:nth-child(n+3) { border-top: 1px solid #dde1e7; }
  .keydates__item b { font-size: 17px; }
  .block__title, .rich h2, .pay h2 { font-size: 22px; }
  .rich .table-info th { width: auto; white-space: normal; }
  .file { flex-wrap: wrap; }
  .file .btn { margin-left: 64px; }
  .lightbox figure { max-width: calc(100% - 24px); }
  .lightbox__prev, .lightbox__next { top: auto; bottom: 16px; transform: none; }
  .totop { right: 12px; bottom: 16px; width: 44px; height: 44px; }
}