/* ==========================================================================
   易倍体育首页平台 · 共享外壳样式 /assets/site.css
   设计语言：球场深绿底 + 电子蓝层次 + 荧光黄绿数据强调，切角面板与斜线轨迹
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, figcaption, blockquote, dl, dt, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --green-deep: #0B3D2E;
  --green-pitch: #145A3C;
  --blue-deep: #0A4D8C;
  --blue-bright: #1E88E5;
  --lime: #D7FF3E;
  --lime-soft: #F2FFB0;
  --ink: #0A0F0D;
  --mist: #F4F7F5;
  --gray: #8A9A94;
  --orange: #FF7A3D;

  --line-soft: rgba(138, 154, 148, 0.26);
  --line-lime: rgba(215, 255, 62, 0.42);
  --text-strong: #F4F7F5;
  --text-body: rgba(244, 247, 245, 0.78);
  --text-mute: rgba(244, 247, 245, 0.55);

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;

  --shell: 1280px;
  --gutter: clamp(16px, 4vw, 44px);
  --rail: 96px;

  --clip-btn: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  --clip-chip: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  --clip-card: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  --clip-mark: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);

  --step-s: clamp(0.75rem, 1.4vw, 1rem);
  --step-m: clamp(1.25rem, 2.6vw, 2rem);
  --step-l: clamp(2.5rem, 6vw, 5rem);
  --shift: 180ms;
}

/* ---------- 3. 中文排版与页面基底 ---------- */
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-body);
  background-color: var(--green-deep);
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 247, 245, 0.045) 0 1px, transparent 1px 128px),
    radial-gradient(120% 80% at 8% -12%, rgba(30, 136, 229, 0.30), transparent 62%),
    radial-gradient(90% 70% at 100% 0%, rgba(215, 255, 62, 0.10), transparent 58%),
    linear-gradient(180deg, #08291F 0%, #0B3D2E 44%, #0A2F24 100%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { color: var(--text-strong); font-weight: 900; letter-spacing: -0.02em; line-height: 1.28; }
h1 { font-size: clamp(1.9rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.45rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.45rem); }
p { text-wrap: pretty; }
:focus-visible { outline: 2px solid var(--lime); outline-offset: 3px; }
::selection { background: var(--lime); color: var(--ink); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.u-mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.u-serif { font-family: var(--font-serif); }
.u-lime { color: var(--lime); }
.rule-slant {
  height: 2px; border: 0; margin: var(--step-m) 0;
  background: linear-gradient(90deg, rgba(215, 255, 62, 0.75), rgba(30, 136, 229, 0.25) 58%, transparent);
  transform: skewY(-1.6deg);
}

.shell { width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: var(--gutter); }
#main-content { display: block; scroll-margin-top: 104px; }
.site-main { padding-top: 112px; padding-bottom: var(--step-l); }

/* ---------- 4. 跳转链 ---------- */
.skip-link {
  position: fixed; left: 50%; top: -110px; transform: translateX(-50%);
  z-index: 120; padding: 0.7rem 1.3rem;
  background: var(--lime); color: var(--ink);
  font-size: 0.86rem; font-weight: 700; letter-spacing: 0.04em;
  clip-path: var(--clip-btn);
  transition: top var(--shift) ease;
}
.skip-link:focus { top: 0.75rem; }

/* ---------- 5. 头部 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 90;
  background-color: transparent;
  border-bottom: 1px solid transparent;
  isolation: isolate;
  transition: background-color var(--shift) linear, border-color var(--shift) linear, box-shadow var(--shift) linear;
}
.site-header[data-scrolled],
.site-header[data-nav-open] {
  background-color: rgba(8, 43, 32, 0.97);
  border-bottom-color: var(--line-lime);
  box-shadow: 0 22px 44px -32px rgba(10, 15, 13, 0.95);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.site-header__strip {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  max-width: var(--shell); margin-inline: auto;
  padding: 0.55rem var(--gutter);
  max-height: 46px; overflow: hidden;
  border-bottom: 1px solid rgba(138, 154, 148, 0.18);
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-mute);
  transition: max-height var(--shift) ease, opacity var(--shift) ease, padding var(--shift) ease;
}
.site-header[data-scrolled] .site-header__strip { max-height: 0; opacity: 0; padding-block: 0; border-bottom-color: transparent; }
.site-header__strip-text { display: inline-flex; align-items: center; gap: 0.55rem; }
.site-header__strip-meta { white-space: nowrap; }
.tick-dot {
  width: 7px; height: 7px; flex: 0 0 auto;
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  box-shadow: 0 0 12px rgba(215, 255, 62, 0.85);
}

.site-header__bar { padding-block: 0.55rem; }
.site-header__inner {
  position: relative; display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.5rem);
  max-width: var(--shell); margin-inline: auto; padding-inline: var(--gutter);
}

.brand { display: inline-flex; align-items: center; gap: 0.75rem; flex: 0 0 auto; }
.brand__mark {
  width: 46px; height: 46px; flex: 0 0 auto;
  display: grid; place-items: center;
  background: linear-gradient(150deg, var(--blue-deep), var(--green-pitch));
  color: var(--lime);
  font-family: var(--font-sans); font-size: 1.3rem; font-weight: 900;
  clip-path: var(--clip-mark);
  box-shadow: inset 0 0 0 1px rgba(215, 255, 62, 0.35);
  transition: transform var(--shift) ease, box-shadow var(--shift) ease;
}
.brand:hover .brand__mark { transform: translateY(-2px); box-shadow: inset 0 0 0 1px var(--lime), 0 14px 26px -18px rgba(215, 255, 62, 0.9); }
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__name { font-size: clamp(0.98rem, 1.4vw, 1.12rem); font-weight: 900; letter-spacing: -0.01em; color: var(--text-strong); }
.brand__tagline { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.08em; color: var(--text-mute); }

.nav-toggle {
  display: none; margin-left: auto; align-items: center; gap: 0.55rem;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--line-lime);
  color: var(--lime);
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase;
  clip-path: var(--clip-btn);
}
.nav-toggle__bars { position: relative; display: block; width: 18px; height: 10px; }
.nav-toggle__bars::before, .nav-toggle__bars::after {
  content: ""; position: absolute; left: 0; right: 0; height: 2px; background: var(--lime);
  transition: transform var(--shift) ease, top var(--shift) ease, bottom var(--shift) ease;
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 4px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { bottom: 4px; transform: rotate(-45deg); }

.site-nav { margin-left: auto; display: flex; align-items: center; gap: clamp(0.5rem, 1.6vw, 1.5rem); }
.site-nav__list { display: flex; align-items: center; gap: clamp(0.1rem, 0.9vw, 0.3rem); }
.site-nav__link {
  position: relative; display: inline-flex; align-items: center;
  padding: 0.5rem 0.8rem;
  font-size: 0.9rem; font-weight: 500; letter-spacing: 0.02em;
  color: var(--text-body);
  clip-path: var(--clip-chip);
  transition: color var(--shift) ease, background-color var(--shift) ease, transform var(--shift) ease;
}
.site-nav__link::after {
  content: ""; position: absolute; left: 0.8rem; right: 0.8rem; bottom: 0.28rem; height: 2px;
  background: var(--lime);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--shift) ease;
}
.site-nav__link:hover { color: var(--text-strong); transform: translateY(-2px); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--lime); background-color: rgba(215, 255, 62, 0.12); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__index { display: none; font-family: var(--font-mono); font-size: 0.7rem; color: var(--gray); }
.site-nav__cta { margin-left: 0.6rem; padding: 0.7rem 1.15rem; font-size: 0.85rem; }
.site-nav__meta { display: none; }

.site-header__progress {
  display: block; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--lime), var(--blue-bright));
  transform: scaleX(0); transform-origin: left;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative; overflow: hidden;
  margin-top: var(--step-l);
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  background: linear-gradient(180deg, rgba(10, 15, 13, 0.92), #0A0F0D 60%);
  border-top: 1px solid rgba(138, 154, 148, 0.22);
  color: var(--text-body);
}
.site-footer::before {
  content: ""; position: absolute; top: -1px; left: 0;
  width: min(420px, 62%); height: 3px;
  background: linear-gradient(90deg, var(--lime), rgba(30, 136, 229, 0));
}
.site-footer::after {
  content: ""; position: absolute; right: -90px; top: -140px;
  width: 440px; height: 440px; pointer-events: none;
  background: radial-gradient(circle at 50% 50%, rgba(30, 136, 229, 0.22), transparent 66%);
}
.site-footer__plate {
  position: relative; z-index: 1;
  max-width: var(--shell); margin-inline: auto; padding-inline: var(--gutter);
  display: grid; grid-template-columns: minmax(250px, 1.05fr) minmax(0, 2fr);
  gap: clamp(2rem, 5vw, 4rem);
}
.site-footer__lead { display: flex; flex-direction: column; align-items: flex-start; gap: 0.75rem; }
.site-footer__eyebrow {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--lime);
}
.site-footer__brand { font-size: clamp(1.25rem, 2.6vw, 1.7rem); font-weight: 900; letter-spacing: -0.01em; line-height: 1.3; color: var(--text-strong); }
.site-footer__desc { max-width: 38ch; font-size: 0.92rem; color: var(--text-mute); }
.site-footer__scale {
  display: flex; align-items: center; gap: 0.6rem;
  width: min(100%, 268px); margin-top: 0.35rem;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em; color: var(--gray);
}
.site-footer__scale-node { white-space: nowrap; }
.site-footer__scale-node--now { color: var(--lime); }
.site-footer__scale-line { flex: 1 1 auto; height: 1px; background: linear-gradient(90deg, var(--gray), var(--lime)); }
.site-footer__cta { margin-top: 0.5rem; }
.site-footer__nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(1.25rem, 3vw, 2.25rem); }
.site-footer__col { min-width: 0; }
.site-footer__col-title {
  position: relative;
  padding-bottom: 0.6rem; margin-bottom: 0.9rem;
  font-family: var(--font-serif); font-weight: 600; font-size: 0.98rem; color: var(--text-strong);
  border-bottom: 1px solid rgba(138, 154, 148, 0.24);
}
.site-footer__col-title::after {
  content: ""; position: absolute; left: 0; bottom: -1px; width: 30px; height: 2px; background: var(--lime);
}
.site-footer__links { display: grid; gap: 0.5rem; }
.site-footer__link {
  display: inline-flex; align-items: center;
  font-size: 0.9rem; color: var(--text-mute);
  transition: color var(--shift) ease, transform var(--shift) ease;
}
.site-footer__link::before {
  content: ""; width: 6px; height: 6px; margin-right: 0.55rem; flex: 0 0 auto;
  background: var(--gray); clip-path: polygon(0 0, 100% 0, 0 100%);
  transition: background-color var(--shift) ease;
}
.site-footer__link:hover { color: var(--lime); transform: translateX(3px); }
.site-footer__link:hover::before { background: var(--lime); }

.site-footer__contact {
  position: relative; z-index: 1;
  max-width: var(--shell); margin: clamp(2rem, 5vw, 3.25rem) auto 0;
  padding: clamp(1.25rem, 3vw, 1.75rem) var(--gutter) 0;
  border-top: 1px solid rgba(138, 154, 148, 0.2);
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1rem, 3vw, 2rem);
}
.contact-line { display: flex; flex-direction: column; gap: 0.3rem; min-width: 0; }
.contact-line__key {
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--gray);
}
.contact-line__value { font-size: 0.94rem; color: var(--text-strong); overflow-wrap: anywhere; }
.contact-line__value--mono { font-family: var(--font-mono); letter-spacing: 0.02em; }

.site-footer__base {
  position: relative; z-index: 1;
  max-width: var(--shell); margin: clamp(1.5rem, 4vw, 2.5rem) auto 0;
  padding: 1rem var(--gutter) 1.75rem;
  border-top: 1px solid rgba(138, 154, 148, 0.2);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.75rem 1.5rem;
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--gray);
}
.site-footer__icp { color: var(--text-mute); }

.to-top {
  position: fixed; right: clamp(14px, 3vw, 32px); bottom: clamp(14px, 3vw, 32px); z-index: 70;
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 1.05rem;
  background: rgba(11, 61, 46, 0.95);
  color: var(--lime);
  border: 1px solid var(--line-lime);
  clip-path: var(--clip-btn);
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase;
  transition: background-color var(--shift) ease, color var(--shift) ease, transform var(--shift) ease;
}
.to-top:hover { background: var(--lime); color: var(--ink); transform: translateY(-3px); }
.to-top[hidden] { display: none; }

/* ---------- 7. 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  font-family: var(--font-sans); font-size: 0.92rem; font-weight: 700; letter-spacing: 0.03em;
  text-align: center; clip-path: var(--clip-btn);
  transition: background-color var(--shift) ease, color var(--shift) ease, transform var(--shift) ease, box-shadow var(--shift) ease;
}
.btn--lime { background: var(--lime); color: var(--ink); }
.btn--lime:hover { background: var(--lime-soft); transform: translateY(-2px); box-shadow: 0 18px 30px -24px rgba(215, 255, 62, 1); }
.btn--blue { background: var(--blue-deep); color: var(--mist); }
.btn--blue:hover { background: var(--blue-bright); color: #FFFFFF; }
.btn--ghost { background: transparent; color: var(--mist); box-shadow: inset 0 0 0 1px rgba(138, 154, 148, 0.55); }
.btn--ghost:hover { color: var(--lime); box-shadow: inset 0 0 0 1px var(--lime); }
.btn--sm { padding: 0.6rem 1.05rem; font-size: 0.82rem; }

/* ---------- 8. 面包屑 ---------- */
.breadcrumb { padding-block: 0.9rem; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; color: var(--gray); }
.breadcrumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: 0.55rem; }
.breadcrumb__item { display: inline-flex; align-items: center; gap: 0.55rem; }
.breadcrumb__item:not(:last-child)::after { content: ""; width: 9px; height: 1px; background: var(--gray); }
.breadcrumb__link { color: var(--text-mute); transition: color var(--shift) ease; }
.breadcrumb__link:hover { color: var(--lime); }
.breadcrumb__current { color: var(--lime); }

/* ---------- 9. 展签 / 卡片 / 标签 / 数据块 ---------- */
.exhibit-label {
  display: inline-flex; align-items: center; gap: 0.65rem;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase;
}
.exhibit-label__no { padding: 0.15rem 0.45rem; color: var(--lime); background: rgba(215, 255, 62, 0.14); border-left: 2px solid var(--lime); }
.exhibit-label__text { color: var(--text-mute); }

.panel {
  position: relative; overflow: hidden;
  padding: clamp(1.2rem, 3vw, 2rem);
  background: linear-gradient(150deg, rgba(20, 90, 60, 0.58), rgba(10, 15, 13, 0.35));
  border: 1px solid var(--line-soft);
  clip-path: var(--clip-card);
  transition: border-color var(--shift) ease, transform var(--shift) ease, box-shadow var(--shift) ease;
}
.panel:hover { border-color: var(--line-lime); transform: translateY(-4px); box-shadow: 0 28px 52px -36px rgba(215, 255, 62, 0.7); }
.panel__bar { position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--accent, var(--lime)); }
.panel__label { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gray); }
.panel__title { margin-top: 0.5rem; font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 900; line-height: 1.35; color: var(--text-strong); }
.panel__meta { margin-top: 0.6rem; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--gray); }
.panel__text { margin-top: 0.6rem; font-size: 0.94rem; color: var(--text-body); }

.tag {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.25rem 0.6rem;
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--lime-soft); color: var(--ink);
}
.tag--lime { background: var(--lime); color: var(--ink); }
.tag--blue { background: var(--blue-deep); color: var(--mist); }
.tag--orange { background: var(--orange); color: var(--ink); }
.tag--outline { background: transparent; color: var(--text-mute); box-shadow: inset 0 0 0 1px rgba(138, 154, 148, 0.45); }

.stat { display: flex; flex-direction: column; gap: 0.35rem; }
.stat__value {
  font-family: var(--font-mono); font-weight: 700;
  font-size: clamp(2.4rem, 7vw, 5rem); line-height: 1; letter-spacing: -0.03em;
  color: var(--lime); font-variant-numeric: tabular-nums;
}
.stat__unit { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gray); }
.stat__caption { max-width: 34ch; font-size: 0.9rem; color: var(--text-body); }

/* ---------- 10. 赛季时间轴 ---------- */
.season-track { display: flex; gap: 0.5rem; padding: 0.4rem 0; overflow-x: auto; scrollbar-width: thin; }
.season-track__node {
  flex: 0 0 auto; padding: 0.45rem 0.85rem;
  font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 0.08em; white-space: nowrap;
  color: var(--text-mute);
  border: 1px solid rgba(138, 154, 148, 0.32);
  clip-path: var(--clip-chip);
  transition: color var(--shift) ease, border-color var(--shift) ease, background-color var(--shift) ease;
}
.season-track__node:hover { color: var(--lime); border-color: var(--line-lime); }
.season-track__node[aria-current="true"] { background: var(--lime); color: var(--ink); border-color: var(--lime); }

/* ---------- 11. 长文阅读区 ---------- */
.content-body {
  padding: clamp(1.4rem, 4vw, 3rem);
  background: var(--mist); color: #22302A;
  clip-path: var(--clip-card);
}
.content-body > * + * { margin-top: 1rem; }
.content-body h2 {
  margin-top: 2.2rem; padding-left: 0.85rem;
  font-size: clamp(1.3rem, 2.6vw, 1.8rem); color: var(--green-deep);
  border-left: 5px solid var(--blue-deep); letter-spacing: -0.01em;
}
.content-body h3 { margin-top: 1.7rem; font-family: var(--font-serif); font-weight: 600; font-size: clamp(1.08rem, 2vw, 1.3rem); color: var(--green-pitch); }
.content-body p, .content-body li { color: #22302A; }
.content-body ul, .content-body ol { display: grid; gap: 0.5rem; }
.content-body li { position: relative; padding-left: 1.25rem; }
.content-body li::before {
  content: ""; position: absolute; left: 0; top: 0.7em; width: 7px; height: 7px;
  background: var(--blue-deep); clip-path: polygon(0 0, 100% 0, 0 100%);
}
.content-body a { color: var(--blue-deep); text-decoration: underline; text-underline-offset: 3px; }
.content-body a:hover { color: var(--blue-bright); }
.content-body strong { color: var(--ink); font-weight: 700; }
.content-body blockquote {
  padding: 0.9rem 1.1rem; margin-top: 1.2rem;
  background: rgba(11, 61, 46, 0.06); border-left: 4px solid var(--lime); color: var(--green-deep);
}

/* ---------- 12. 网格 ---------- */
.grid { display: grid; gap: clamp(1rem, 2.5vw, 1.75rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--rail { grid-template-columns: var(--rail) minmax(0, 1fr); }

/* ---------- 13. 图片容器（页面阶段放图或留空占位） ---------- */
.media-frame {
  position: relative; display: block; overflow: hidden; isolation: isolate;
  aspect-ratio: 16 / 9;
  background: linear-gradient(150deg, var(--green-pitch), var(--blue-deep) 68%, var(--blue-bright));
  clip-path: var(--clip-card);
}
.media-frame::before {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(244, 247, 245, 0.16) 0 1px, transparent 1px 64px);
  opacity: 0.5;
}
.media-frame__img { width: 100%; height: 100%; object-fit: cover; }
.media-frame__badge {
  position: absolute; left: 0; top: 0; z-index: 2;
  padding: 0.4rem 0.8rem; background: var(--lime); color: var(--ink);
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase;
}
.media-frame__caption {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 2;
  padding: 1.2rem 1rem 0.85rem;
  background: linear-gradient(180deg, transparent, rgba(10, 15, 13, 0.88));
  color: var(--mist); font-size: 0.85rem;
}
.media-frame--portrait { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-figure { display: grid; gap: 0.6rem; }
.media-figure__caption { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; color: var(--gray); }

/* ---------- 14. 渐显 ---------- */
.has-js [data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity 520ms ease, transform 520ms ease; }
.has-js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1080px) {
  .brand__tagline { display: none; }
  .site-footer__plate { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
  .site-footer__contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .site-header__strip { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-main { padding-top: 84px; }
  #main-content { scroll-margin-top: 80px; }

  .site-nav {
    position: absolute; top: calc(100% + 0.55rem); left: var(--gutter); right: var(--gutter);
    z-index: 95; margin-left: 0;
    display: grid; align-content: start; gap: 0;
    max-height: calc(100vh - 120px); overflow-y: auto;
    padding: 1rem;
    background: linear-gradient(160deg, rgba(10, 48, 36, 0.99), rgba(8, 32, 25, 0.99));
    border: 1px solid var(--line-lime);
    clip-path: var(--clip-card);
    opacity: 0; visibility: hidden; transform: translateY(-10px);
    transition: opacity var(--shift) ease, transform var(--shift) ease, visibility var(--shift) ease;
  }
  .site-nav[data-open] { opacity: 1; visibility: visible; transform: translateY(0); }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav__item { border-bottom: 1px solid rgba(138, 154, 148, 0.18); }
  .site-nav__link { width: 100%; padding: 0.85rem 0.6rem; font-size: 1rem; }
  .site-nav__link::after { display: none; }
  .site-nav__link:hover { transform: none; }
  .site-nav__index { display: inline-block; width: 2rem; letter-spacing: 0.1em; }
  .site-nav__cta { width: 100%; margin: 1rem 0 0; }
  .site-nav__meta {
    display: block; margin-top: 0.85rem;
    font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; color: var(--text-mute);
  }
  .site-footer__scale { width: 100%; }
  .site-footer__base { font-size: 0.68rem; }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .grid--rail { grid-template-columns: minmax(0, 1fr); }
  .site-footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer__contact { grid-template-columns: minmax(0, 1fr); }
  .site-footer__base { flex-direction: column; align-items: flex-start; }
  .brand__mark { width: 40px; height: 40px; font-size: 1.15rem; }
  .to-top { padding: 0.6rem 0.85rem; font-size: 0.66rem; }
}

/* ---------- 16. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .has-js [data-reveal] { opacity: 1; transform: none; }
  .panel:hover, .btn:hover, .site-nav__link:hover, .site-footer__link:hover, .to-top:hover, .brand:hover .brand__mark { transform: none; }
}