/* ===========================================================
   大江体育主站 /assets/site.css
   共享外壳：reset、变量、中文排版、头部、页脚、通用组件
   =========================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: var(--paper);
}

body, h1, h2, h3, h4, h5, p, ul, ol, li, dl, dt, dd, figure, blockquote {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }
img, svg, video { max-width: 100%; }
img { height: auto; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --river: #0A4C8B;
  --river-deep: #06305A;
  --orange: #FF5A1F;
  --orange-deep: #C43A0C;
  --peach: #FFB08C;
  --green: #0B3D2E;
  --cyan: #00E0C6;
  --paper: #F6F1E7;
  --paper-2: #E7DFCF;
  --paper-3: #FDFBF6;
  --ink: #14202B;
  --slate: #4E5D6A;
  --gold: #C8A24A;

  --rail: 248px;
  --topbar: 64px;
  --maxw: 1240px;
  --gap: 20px;

  --serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Inter", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  --ease: cubic-bezier(.2, .7, .3, 1);
  --radius-organic: 22px 8px 26px 10px;
  --radius-soft: 999px 6px 999px 999px;
}

/* ---------- 3. 中文排版基底 ---------- */
body {
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.6;
  letter-spacing: .004em;
  padding-left: var(--rail);
  padding-top: var(--topbar);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 { line-height: 1.16; }

h1 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(30px, 4.4vw, 54px);
  letter-spacing: -.02em;
  text-wrap: balance;
}

h2 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(20px, 2.2vw, 28px);
  letter-spacing: -.01em;
}

h3 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(17px, 1.5vw, 20px);
  letter-spacing: -.005em;
}

h4 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 15px;
}

p { text-wrap: pretty; }
strong { font-weight: 700; }

.title-serif {
  font-family: var(--serif);
  font-weight: 900;
  letter-spacing: -.02em;
}

.num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.label {
  display: inline-block;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--river);
}

.label--slate { color: var(--slate); }
.label--gold { color: var(--gold); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--river);
}

.eyebrow::after {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold);
  opacity: .8;
}

.muted { color: var(--slate); }
.is-hidden { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  white-space: nowrap;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ---------- 4. 布局容器与 Bento 栅格 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 44px);
}

.section { padding-block: clamp(40px, 6vw, 84px); }
.section--tight { padding-block: clamp(26px, 3.5vw, 46px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  padding-bottom: 12px;
  margin-bottom: 26px;
  border-bottom: 1px solid rgba(10, 76, 139, .25);
}

.section-head__aside { margin-left: auto; }

.rule-gold {
  height: 1px;
  border: 0;
  background: var(--gold);
  opacity: .5;
}

.page-head {
  padding-block: clamp(26px, 4vw, 54px) clamp(20px, 3vw, 34px);
  border-bottom: 1px solid rgba(10, 76, 139, .25);
}

.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.bento > * { grid-column: span 12; }

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-10 { grid-column: span 10; }
.span-12 { grid-column: span 12; }

/* ---------- 5. 基础块与卡片 ---------- */
.cell,
.card {
  position: relative;
  background: var(--paper-2);
  border: 1px solid rgba(20, 32, 43, .1);
  border-radius: var(--radius-organic);
  padding: clamp(16px, 2.2vw, 28px);
  transition: border-color .18s var(--ease), background .18s var(--ease);
}

.cell:hover,
.card:hover {
  border-color: var(--cyan);
  background: #EFE8DA;
}

.cell--ink { background: var(--green); color: #E8F1EC; border-color: rgba(0, 224, 198, .18); }
.cell--ink:hover { background: #0E4A37; border-color: var(--cyan); }
.cell--ink .label, .cell--ink .eyebrow { color: var(--cyan); }
.cell--ink .muted { color: #A9C2B6; }

.cell--deep { background: var(--river-deep); color: #E6EDF4; border-color: rgba(0, 224, 198, .2); }
.cell--deep:hover { background: #073A6C; border-color: var(--cyan); }
.cell--deep .label, .cell--deep .eyebrow { color: var(--cyan); }
.cell--deep .muted { color: #A7BDD2; }

.cell--blue { background: var(--river); color: #FFFFFF; border-color: rgba(0, 224, 198, .25); }
.cell--blue:hover { background: #0B5AA3; border-color: var(--cyan); }
.cell--blue .label, .cell--blue .eyebrow { color: #9FE9DE; }

.cell--orange { background: var(--orange); color: #FFFFFF; border-color: rgba(255, 255, 255, .3); }
.cell--orange:hover { background: #E24B12; border-color: var(--cyan); }
.cell--orange .label, .cell--orange .eyebrow { color: #2A1305; }

.stack { display: flex; flex-direction: column; gap: 12px; }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }

/* ---------- 6. 按钮与链接 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-soft);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  transition: background .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), transform .16s var(--ease);
}

.btn:active { transform: translateY(1px); }

.btn--primary { background: var(--orange); color: #FFFFFF; }
.btn--primary:hover { background: #E64A12; border-color: var(--cyan); }

.btn--ghost {
  background: transparent;
  color: var(--river);
  border-color: rgba(10, 76, 139, .4);
}
.btn--ghost:hover { background: var(--paper-2); border-color: var(--cyan); color: var(--river-deep); }

.btn--ink { background: var(--green); color: #E8F1EC; }
.btn--ink:hover { background: #0E4A37; border-color: var(--cyan); }

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--river);
  border-bottom: 1px solid rgba(10, 76, 139, .4);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.link-more::after {
  content: "→";
  transition: transform .18s var(--ease);
}

.link-more:hover { color: var(--river-deep); border-color: var(--cyan); }
.link-more:hover::after { transform: translateX(3px); }

/* ---------- 7. 标签、数据点、面包屑、正文 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border: 1px solid rgba(10, 76, 139, .2);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--river);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.tag--orange { background: rgba(255, 90, 31, .12); color: var(--orange-deep); border-color: rgba(255, 90, 31, .35); }
.tag--cyan { background: rgba(0, 224, 198, .14); color: #046B60; border-color: rgba(0, 224, 198, .5); }
.tag--gold { background: rgba(200, 162, 74, .16); color: #7A5F16; border-color: rgba(200, 162, 74, .45); }

.stat { display: flex; flex-direction: column; gap: 6px; }

.stat__value {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--river);
}

.stat__label {
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--slate);
}

.cell--deep .stat__value, .cell--blue .stat__value, .cell--ink .stat__value { color: var(--cyan); }
.cell--deep .stat__label, .cell--blue .stat__label, .cell--ink .stat__label { color: rgba(255, 255, 255, .72); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  padding-block: 14px;
  font-size: 12.5px;
  color: var(--slate);
}

.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--gold); }
.breadcrumb a { color: var(--river); border-bottom: 1px solid rgba(10, 76, 139, .3); }
.breadcrumb a:hover { border-bottom-color: var(--cyan); }

.prose { max-width: 72ch; }
.prose p { margin-bottom: 1em; }
.prose h2 { margin: 1.8em 0 .6em; }
.prose h3 { margin: 1.5em 0 .5em; }
.prose ul, .prose ol { margin: 0 0 1em; padding-left: 1.25em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: .4em; }
.prose li::marker { color: var(--gold); }

/* ---------- 8. 纹理与图片容器 ---------- */
.tex-grid {
  background-image:
    linear-gradient(rgba(20, 32, 43, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 32, 43, .05) 1px, transparent 1px);
  background-size: 30px 30px;
}

.tex-halftone {
  background-image: radial-gradient(rgba(10, 76, 139, .22) 1px, transparent 1.4px);
  background-size: 12px 12px;
}

.tex-contour {
  background-image: repeating-radial-gradient(circle at 12% 120%,
    rgba(10, 76, 139, .14) 0 1px, transparent 1px 22px);
}

.media-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-organic);
  background: var(--paper-2);
  isolation: isolate;
}

.media-frame > img,
.media-frame > svg,
.media-frame > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }

.media-frame--night {
  background-image:
    radial-gradient(60% 55% at 16% 10%, rgba(0, 224, 198, .38), transparent 62%),
    radial-gradient(52% 60% at 84% 22%, rgba(255, 90, 31, .34), transparent 66%),
    linear-gradient(158deg, #06305A 0%, #0A4C8B 48%, #0B3D2E 100%);
}

.media-frame--wave {
  background-image:
    repeating-linear-gradient(108deg,
      rgba(246, 241, 231, .22) 0 6px,
      transparent 6px 20px),
    linear-gradient(140deg, #0A4C8B 0%, #06305A 60%, #0B3D2E 100%);
}

.media-frame--data {
  background-image:
    linear-gradient(rgba(0, 224, 198, .18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 224, 198, .18) 1px, transparent 1px),
    linear-gradient(160deg, #0B3D2E 0%, #06305A 100%);
  background-size: 28px 28px, 28px 28px, cover;
}

.media-frame--athlete {
  background-image:
    radial-gradient(38% 70% at 68% 62%, rgba(20, 32, 43, .75), transparent 70%),
    linear-gradient(115deg, rgba(255, 90, 31, .5) 0%, transparent 46%),
    linear-gradient(200deg, #E7DFCF 0%, #0A4C8B 100%);
}

/* ---------- 9. 筛选组件 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.filter-input {
  flex: 1 1 240px;
  min-width: 0;
  padding: 12px 16px;
  background: var(--paper-3);
  color: var(--ink);
  border: 1px solid rgba(10, 76, 139, .35);
  border-radius: var(--radius-soft);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.3;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.filter-input::placeholder { color: var(--slate); }

.filter-input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 224, 198, .22);
}

.filter-chip {
  padding: 10px 14px;
  background: transparent;
  color: var(--river);
  border: 1px solid rgba(10, 76, 139, .35);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .06em;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.filter-chip:hover { background: var(--paper-2); border-color: var(--cyan); }

.filter-chip[aria-pressed="true"] {
  background: var(--river);
  color: #FFFFFF;
  border-color: var(--river);
}

.filter-count {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--river);
}

.filter-empty {
  display: none;
  padding: 22px;
  border: 1px dashed rgba(10, 76, 139, .4);
  border-radius: var(--radius-organic);
  color: var(--slate);
  font-size: 14px;
}

.filter-empty.is-visible { display: block; }

/* ---------- 10. 动效基元 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 70;
  background: rgba(20, 32, 43, .1);
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--river) 0%, var(--cyan) 100%);
  transition: width .1s linear;
}

html[data-motion="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

html[data-motion="on"] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

html[data-motion="off"] [data-reveal],
html:not([data-motion]) [data-reveal] {
  opacity: 1;
  transform: none;
}

/* ---------- 11. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  z-index: 95;
  top: 0;
  left: calc(var(--rail) + 12px);
  transform: translateY(-140%);
  padding: 12px 18px;
  background: var(--cyan);
  color: var(--ink);
  border-radius: 0 0 14px 14px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .1em;
  transition: transform .18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 12. 头部：顶部横条 + 框架式竖向导航 ---------- */
.site-header { position: relative; }

.topbar {
  position: fixed;
  top: 0;
  left: var(--rail);
  right: 0;
  z-index: 50;
  height: var(--topbar);
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
  padding-inline: clamp(16px, 3vw, 34px);
  background: var(--paper);
  border-bottom: 1px solid rgba(10, 76, 139, .45);
}

.topbar__brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: 0 0 auto;
  min-width: 0;
}

.topbar__wordmark {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -.02em;
  color: var(--river);
}

.topbar__edition {
  font-size: 11px;
  line-height: 1;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--slate);
}

.topbar__tagline {
  flex: 1 1 auto;
  min-width: 0;
  padding-left: clamp(12px, 2vw, 24px);
  border-left: 1px solid rgba(200, 162, 74, .7);
  color: var(--slate);
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar__utility {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.utility-link {
  display: inline-block;
  padding: 9px 13px;
  border: 1px solid rgba(10, 76, 139, .28);
  border-radius: var(--radius-soft);
  color: var(--river);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .08em;
  white-space: nowrap;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.utility-link:hover {
  background: var(--paper-2);
  border-color: var(--cyan);
  color: var(--river-deep);
}

.frame-nav {
  position: fixed;
  z-index: 56;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px 0 20px;
  background: var(--paper);
  border-right: 1px solid var(--river);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.frame-nav__label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-inline: 20px;
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate);
}

.frame-nav__label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--gold);
  opacity: .65;
}

.frame-nav__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-right: 12px;
}

.nav-link {
  position: relative;
  display: grid;
  grid-template-columns: 24px 1fr;
  align-items: center;
  gap: 10px;
  padding: 12px 16px 12px 20px;
  border-left: 3px solid transparent;
  border-radius: 0 16px 16px 0;
  color: var(--ink);
  font-size: 14.5px;
  font-weight: 600;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.nav-link__index {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--slate);
  transition: color .18s var(--ease);
}

.nav-link__text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.nav-link:hover { background: var(--paper-2); border-left-color: var(--river); }
.nav-link:hover .nav-link__index { color: var(--river); }

.nav-link[aria-current="page"] {
  background: var(--river);
  color: #FFFFFF;
  border-left-color: var(--cyan);
}

.nav-link[aria-current="page"] .nav-link__index { color: var(--cyan); }

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 2px;
  background: var(--cyan);
}

.frame-nav__foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 20px 0;
  border-top: 1px solid rgba(10, 76, 139, .2);
}

.frame-nav__cta { width: 100%; }

.frame-nav__meta {
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: .06em;
  color: var(--slate);
}

.nav-toggle { display: none; }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--river-deep);
  color: #E9EEF3;
  overflow: hidden;
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 160px;
  background: repeating-linear-gradient(102deg,
    rgba(0, 224, 198, .05) 0 8px,
    transparent 8px 26px);
  pointer-events: none;
}

.footer__wave {
  display: block;
  width: 100%;
  height: 40px;
  color: var(--cyan);
  opacity: .45;
}

.footer__inner {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(30px, 4vw, 56px) clamp(18px, 4vw, 44px) clamp(26px, 3vw, 40px);
  display: grid;
  gap: clamp(26px, 3vw, 48px);
  grid-template-columns: minmax(220px, 1.15fr) minmax(0, 1.7fr) minmax(240px, 1.15fr);
}

.footer__wordmark {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 26px;
  letter-spacing: -.02em;
  color: #FFFFFF;
}

.footer__edition {
  margin-top: 6px;
  font-size: 11px;
  line-height: 1;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer__note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 13.5px;
  line-height: 1.7;
  color: #A7BDD2;
}

.footer__columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.footer__heading {
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(200, 162, 74, .5);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer__list { display: flex; flex-direction: column; gap: 4px; }

.footer__link {
  display: inline-block;
  padding: 5px 0;
  color: #D6DEE6;
  font-size: 14px;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.footer__link:hover { color: #FFFFFF; border-bottom-color: var(--cyan); }
.footer__link[aria-current="page"] { color: #FFFFFF; border-bottom-color: var(--cyan); }

.footer__list--contact { gap: 12px; }

.footer__contact-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 13.5px;
}

.footer__contact-key {
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer__contact-value { color: #D6DEE6; word-break: break-word; }
.footer__contact-value.num { font-size: 13px; letter-spacing: 0; }

.footer__contact-note {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: #93A9BF;
}

.footer__base {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 16px clamp(18px, 4vw, 44px) 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  font-size: 12.5px;
  color: #9FB2C4;
}

.footer__legal { color: #C3D2E0; }
.footer__copy .num,
.footer__copy [data-year] { font-family: var(--mono); }

/* ---------- 14. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 66;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: var(--paper);
  color: var(--river);
  border: 1px solid var(--river);
  border-radius: 999px 5px 999px 999px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s var(--ease), visibility .2s var(--ease),
              border-color .18s var(--ease), color .18s var(--ease);
}

.to-top__glyph { font-size: 17px; line-height: 1; }

.to-top.is-visible { opacity: 1; visibility: visible; }
.to-top:hover { border-color: var(--cyan); color: var(--river-deep); }

/* ---------- 15. 平板 ---------- */
@media (max-width: 1180px) {
  :root { --rail: 214px; }

  .topbar__tagline { display: none; }

  .footer__inner {
    grid-template-columns: minmax(200px, 1fr) minmax(0, 1.6fr);
  }
  .footer__contact { grid-column: 1 / -1; }

  .span-3 { grid-column: span 6; }
  .span-4 { grid-column: span 6; }
  .span-8 { grid-column: span 12; }
}

/* ---------- 16. 手机 / 平板（框架导航折叠） ---------- */
@media (max-width: 960px) {
  :root { --rail: 0px; --topbar: 56px; --gap: 14px; }

  body { font-size: 16px; padding-left: 0; }

  .topbar {
    left: 0;
    padding-inline: 14px 12px;
    gap: 12px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .topbar::-webkit-scrollbar { display: none; }

  .topbar__wordmark { font-size: 18px; }
  .topbar__edition { display: none; }
  .topbar__utility { margin-left: auto; gap: 6px; }
  .utility-link { padding: 8px 11px; font-size: 11px; }

  .skip-link { left: 12px; }

  .frame-nav {
    width: min(320px, 86vw);
    transform: translateX(-104%);
    visibility: hidden;
    box-shadow: 14px 0 40px rgba(6, 48, 90, .24);
    transition: transform .24s var(--ease), visibility .24s var(--ease);
  }

  .site-header[data-open] .frame-nav {
    transform: translateX(0);
    visibility: visible;
  }

  .site-header[data-open]::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 52;
    background: rgba(20, 32, 43, .5);
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    position: fixed;
    z-index: 80;
    left: 14px;
    bottom: 14px;
    padding: 12px 18px;
    background: var(--river);
    color: #FFFFFF;
    border: 1px solid var(--river-deep);
    border-radius: 999px 6px 999px 999px;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: .1em;
    text-transform: uppercase;
    transition: background .18s var(--ease), border-color .18s var(--ease);
  }

  .site-header[data-open] .nav-toggle {
    background: var(--orange);
    border-color: var(--orange-deep);
  }

  .nav-toggle__bars {
    position: relative;
    display: block;
    width: 18px;
    height: 12px;
  }

  .nav-toggle__bars::before,
  .nav-toggle__bars::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: currentColor;
    transition: transform .2s var(--ease), top .2s var(--ease);
  }

  .nav-toggle__bars::before { top: 0; }
  .nav-toggle__bars::after { top: 10px; }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 5px; transform: rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 5px; transform: rotate(-45deg); }

  .to-top { bottom: 76px; right: 14px; }

  .span-3, .span-4, .span-6, .span-8, .span-10 { grid-column: span 12; }

  .footer__inner { grid-template-columns: minmax(0, 1fr); }
  .footer__columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__contact { grid-column: auto; }
  .footer__wave { height: 28px; }
}

@media (max-width: 560px) {
  .topbar__wordmark { font-size: 16px; }
  .utility-link:nth-child(3) { display: none; }

  .footer__columns { grid-template-columns: minmax(0, 1fr); }
  .footer__base { flex-direction: column; align-items: flex-start; }

  .cell, .card { border-radius: 16px 6px 20px 8px; }
}

/* ---------- 17. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  html[data-motion="on"] [data-reveal] { opacity: 1; transform: none; }
  .scroll-progress__bar { transition: none; }
}