/* ============================================================
   天行体育赛事 · 共享站点样式  /assets/site.css
   夜赛墨绿底 · 轮次刻度线索 · 大字读情绪 / 小字读数据
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

ul, ol { padding: 0; list-style: none; }

img, picture, video, canvas, svg { display: block; max-width: 100%; }

button, input, select, textarea { font: inherit; }

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

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

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩体系 */
  --ink: #0E2B24;
  --ink-deep: #081914;
  --stone: #232A2E;
  --pine: #3C5A50;
  --cyan: #2BE3C6;
  --amber: #FF8A3D;
  --red: #E4453A;
  --mist: #F1F4EF;
  --data: #9DA9A3;
  --dusk: #1B3A57;
  --tick: #F5C451;

  /* 线条 */
  --line-soft: rgba(60, 90, 80, 0.42);
  --line-mid: rgba(60, 90, 80, 0.66);
  --line-cyan: rgba(43, 227, 198, 0.34);
  --glass: rgba(35, 42, 46, 0.72);

  /* 字体族 */
  --font-display: "Oswald", "Barlow Condensed", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, sans-serif;
  --font-num: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  /* 形状 */
  --radius-s: 12px;
  --radius-m: 20px;
  --radius-l: 32px;
  --radius-pill: 999px;

  /* 版式尺度 */
  --gutter: clamp(18px, 4.4vw, 56px);
  --width: 1280px;
  --width-prose: 720px;

  /* 其他 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-lift: 0 18px 44px rgba(2, 12, 9, 0.46);
}

/* ---------- 3. 页面底色与中文排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 620px at 8% -10%, rgba(43, 227, 198, 0.10), transparent 62%),
    radial-gradient(880px 520px at 96% 2%, rgba(255, 138, 61, 0.075), transparent 60%),
    radial-gradient(900px 720px at 50% 116%, rgba(27, 58, 87, 0.5), transparent 68%),
    linear-gradient(180deg, #0E2B24 0%, #0B211B 48%, #081914 100%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

@media (min-width: 1000px) {
  body { font-size: 17px; }
}

body.is-nav-open { overflow: hidden; }

::selection {
  background: var(--cyan);
  color: var(--ink-deep);
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--mist);
  text-wrap: balance;
}

h1 { font-size: clamp(38px, 6.2vw, 76px); }
h2 { font-size: clamp(28px, 4.2vw, 52px); }
h3 { font-size: clamp(20px, 2.4vw, 28px); letter-spacing: -0.01em; }
h4 { font-size: 18px; letter-spacing: 0; line-height: 1.4; }

p { text-wrap: pretty; }

.num,
.tnum {
  font-family: var(--font-num);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* ---------- 4. 焦点可见性 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.nav-link:focus-visible,
.btn:focus-visible,
.site-foot__link:focus-visible {
  outline-offset: 2px;
}

#main-content:focus { outline: none; }

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 400;
  transform: translate(-50%, -160%);
  padding: 10px 22px;
  border-radius: 0 0 var(--radius-pill) var(--radius-pill);
  background: var(--cyan);
  color: var(--ink-deep);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: transform 0.22s var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

/* ---------- 6. 页头 · 居中刊头 ---------- */
.masthead {
  position: relative;
  z-index: 120;
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(180deg, rgba(14, 43, 36, 0.94) 0%, rgba(11, 33, 27, 0.72) 100%);
}

/* 阅读进度：固定在视口顶端 */
.masthead__progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 300;
  background: rgba(60, 90, 80, 0.4);
}

.masthead__progress-bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--tick) 58%, var(--amber) 100%);
}

.masthead__frame {
  width: 100%;
  max-width: var(--width);
  margin: 0 auto;
  padding: clamp(14px, 2vw, 26px) var(--gutter) clamp(12px, 1.6vw, 20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(10px, 1.4vw, 18px);
}

.masthead__topline {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
}

.masthead__kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-num);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--data);
}

.tick-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tick);
  box-shadow: 0 0 0 4px rgba(245, 196, 81, 0.15);
  flex: none;
}

.masthead__cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.masthead__cta--desktop { display: flex; }
.masthead__cta--drawer { display: none; }

.masthead__brandline {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.masthead__mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 6.4vw, 86px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  color: var(--mist);
  transition: color 0.22s var(--ease), text-shadow 0.22s var(--ease);
}

.masthead__mark:hover {
  color: var(--cyan);
  text-shadow: 0 0 42px rgba(43, 227, 198, 0.32);
}

.masthead__tagline {
  font-size: clamp(11px, 1.2vw, 14px);
  font-weight: 600;
  letter-spacing: 0.44em;
  text-indent: 0.44em;
  color: var(--cyan);
}

.masthead__support {
  max-width: 34em;
  text-align: center;
  font-size: 14px;
  color: var(--data);
  letter-spacing: 0.02em;
}

/* ---------- 7. 导航 ---------- */
.masthead__nav {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 4px;
}

.nav-list__item { display: block; }

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  color: rgba(241, 244, 239, 0.78);
  position: relative;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 9px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transition: transform 0.24s var(--ease);
}

.nav-link:hover {
  color: var(--mist);
  background: rgba(43, 227, 198, 0.10);
}

.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  background: var(--cyan);
  color: var(--ink-deep);
  font-weight: 700;
}

.nav-link[aria-current="page"]::after { display: none; }

/* 移动端栏目按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-pill);
  color: var(--mist);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.nav-toggle:hover { background: rgba(43, 227, 198, 0.12); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: background-color 0.2s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform 0.24s var(--ease), top 0.24s var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

/* 抽屉遮罩（桌面端常驻但不可点） */
.masthead__scrim {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(8, 25, 20, 0.68);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s var(--ease);
}

.masthead__scrim.is-on {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition:
    transform 0.2s var(--ease),
    background-color 0.2s var(--ease),
    color 0.2s var(--ease),
    border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.btn--solid {
  background: var(--amber);
  color: #23140A;
  box-shadow: 0 10px 26px rgba(255, 138, 61, 0.24);
}

.btn--solid:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(255, 138, 61, 0.34);
}

.btn--ghost {
  border-color: var(--line-cyan);
  color: var(--cyan);
}

.btn--ghost:hover {
  background: rgba(43, 227, 198, 0.12);
  transform: translateY(-2px);
}

.btn--quiet {
  background: rgba(60, 90, 80, 0.42);
  color: var(--mist);
}

.btn--quiet:hover { background: rgba(60, 90, 80, 0.66); }

/* ---------- 9. 通用骨架 ---------- */
.container {
  width: 100%;
  max-width: var(--width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose {
  width: 100%;
  max-width: var(--width-prose);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(44px, 7.5vw, 104px);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: clamp(22px, 3vw, 40px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-num);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  flex: none;
}

.lede {
  max-width: 62ch;
  font-size: clamp(15.5px, 1.5vw, 18px);
  line-height: 1.8;
  color: rgba(241, 244, 239, 0.82);
}

.caption {
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--data);
}

.divider {
  height: 1px;
  border: 0;
  background: repeating-linear-gradient(
    90deg,
    var(--line-mid) 0 12px,
    transparent 12px 24px
  );
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  padding-block: 18px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--data);
}

.breadcrumbs li { display: inline-flex; align-items: center; gap: 6px; }

.breadcrumbs li + li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--pine);
}

.breadcrumbs a {
  color: var(--data);
  transition: color 0.2s var(--ease);
}

.breadcrumbs a:hover { color: var(--cyan); }

.breadcrumbs [aria-current="page"] { color: var(--mist); }

/* ---------- 11. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 28px);
  grid-template-columns: 1fr;
}

.grid--2,
.grid--3,
.grid--auto { grid-template-columns: 1fr; }

@media (min-width: 720px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
}

@media (min-width: 1060px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- 12. 赛事组件 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius-pill);
  font-family: var(--font-num);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--data);
  background: rgba(35, 42, 46, 0.5);
}

.chip--live {
  border-color: rgba(43, 227, 198, 0.5);
  color: var(--cyan);
}

.chip--event {
  border-color: rgba(228, 69, 58, 0.55);
  color: var(--red);
}

.data-card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.data-card--overlap {
  margin-top: -24px;
  margin-left: clamp(0px, 3vw, 32px);
  box-shadow: var(--shadow-lift);
}

.data-card--dusk {
  background: linear-gradient(150deg, rgba(27, 58, 87, 0.78), rgba(14, 43, 36, 0.86));
}

.tick-rail {
  position: relative;
  padding-left: clamp(20px, 3vw, 34px);
  border-left: 1px solid var(--line-mid);
}

.tick-rail__item {
  position: relative;
  padding: 12px 0;
  color: rgba(241, 244, 239, 0.72);
}

.tick-rail__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(20px, 3vw, 34px) - 1px);
  top: calc(50% - 1px);
  width: clamp(12px, 2vw, 20px);
  height: 2px;
  background: var(--pine);
  transition: background-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.tick-rail__item[data-active="true"] {
  color: var(--mist);
}

.tick-rail__item[data-active="true"]::before {
  background: var(--tick);
  box-shadow: 0 0 0 4px rgba(245, 196, 81, 0.16);
}

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

.stat__value {
  font-family: var(--font-num);
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.stat__value--score { color: var(--red); }
.stat__value--tick { color: var(--tick); }

.stat__label {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--data);
}

/* ---------- 13. 图片容器（页面阶段放置图片） ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-l);
  background:
    linear-gradient(148deg, var(--dusk) 0%, var(--pine) 52%, var(--ink-deep) 100%);
  isolation: isolate;
}

.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame > img,
.media-frame > picture,
.media-frame > picture > img,
.media-frame > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.06) brightness(0.92);
}

.media-frame--scrim::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(8, 25, 20, 0) 42%, rgba(8, 25, 20, 0.78) 100%);
}

.media-frame__caption {
  position: absolute;
  left: clamp(14px, 2vw, 24px);
  right: clamp(14px, 2vw, 24px);
  bottom: clamp(14px, 2vw, 24px);
  z-index: 2;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: rgba(241, 244, 239, 0.86);
}

/* 图片容器内的轮次刻度装饰 */
.media-frame__tick {
  position: absolute;
  top: clamp(14px, 2vw, 22px);
  left: clamp(14px, 2vw, 22px);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(8, 25, 20, 0.7);
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--tick);
}

/* ---------- 14. 入场显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s var(--ease), transform 0.32s var(--ease);
  will-change: opacity, transform;
}

.js [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* 页面内索引高亮 */
[data-spy-link][aria-current="true"] {
  color: var(--cyan);
}

/* ---------- 15. 页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(52px, 8vw, 112px);
  border-top: 1px solid var(--line-mid);
  background: linear-gradient(180deg, rgba(35, 42, 46, 0.58) 0%, rgba(8, 25, 20, 0.96) 100%);
}

.site-foot::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--pine) 0 14px,
    transparent 14px 30px
  );
  opacity: 0.9;
}

.site-foot__frame {
  width: 100%;
  max-width: var(--width);
  margin: 0 auto;
  padding: clamp(38px, 5.6vw, 74px) var(--gutter) clamp(20px, 3vw, 34px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
}

.site-foot__brand {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 46ch;
}

.site-foot__mark {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}

.site-foot__mark:hover { color: var(--cyan); }

.site-foot__tagline {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.4em;
  text-indent: 0.4em;
  color: var(--cyan);
}

.site-foot__blurb {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(157, 169, 163, 0.95);
}

.site-foot__col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-foot__title {
  font-family: var(--font-num);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.site-foot__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-foot__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  color: rgba(241, 244, 239, 0.76);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.site-foot__link:hover {
  color: var(--mist);
  transform: translateX(3px);
}

.site-foot__contact {
  display: grid;
  gap: 16px 32px;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  padding-top: clamp(18px, 2.6vw, 28px);
  border-top: 1px solid var(--line-soft);
}

.site-foot__contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-foot__contact-label {
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--tick);
}

.site-foot__contact-value {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(241, 244, 239, 0.84);
  word-break: break-word;
}

.site-foot__legal {
  width: 100%;
  max-width: var(--width);
  margin: 0 auto;
  padding: 16px var(--gutter) clamp(26px, 3.4vw, 40px);
  border-top: 1px solid rgba(60, 90, 80, 0.3);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: rgba(157, 169, 163, 0.88);
}

.site-foot__fine {
  max-width: 62ch;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(157, 169, 163, 0.72);
}

@media (min-width: 700px) {
  .site-foot__frame { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .site-foot__brand { grid-column: 1 / -1; }
  .site-foot__contact { grid-column: 1 / -1; }
}

@media (min-width: 1040px) {
  .site-foot__frame {
    grid-template-columns: minmax(260px, 1.7fr) repeat(3, minmax(120px, 0.78fr));
  }
  .site-foot__brand { grid-column: auto; }
  .site-foot__contact { grid-column: 1 / -1; }
}

/* ---------- 16. 移动端断点 ---------- */
@media (max-width: 900px) {
  .masthead__topline .masthead__cta--desktop { display: none; }
  .masthead__support { display: none; }

  .nav-toggle { display: inline-flex; }

  .masthead__nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 200;
    width: min(340px, 86vw);
    padding: 30px 22px 34px;
    align-items: stretch;
    gap: 20px;
    overflow-y: auto;
    border-right: 1px solid var(--line-cyan);
    background: linear-gradient(180deg, #10241D 0%, #0A1D18 72%, #081914 100%);
    box-shadow: 26px 0 64px rgba(0, 0, 0, 0.52);
    transform: translateX(-102%);
    transition: transform 0.32s var(--ease);
  }

  .masthead__nav[data-open] { transform: translateX(0); }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 6px;
    width: 100%;
  }

  .nav-link {
    justify-content: flex-start;
    width: 100%;
    padding: 0 18px;
    border-radius: var(--radius-m);
    font-size: 17px;
  }

  .nav-link::after { display: none; }

  .masthead__cta--drawer {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 6px;
    padding-top: 18px;
    border-top: 1px solid var(--line-soft);
  }

  .masthead__cta--drawer .btn { width: 100%; }
}

@media (max-width: 520px) {
  .masthead__cta--drawer .btn,
  .masthead__cta--desktop .btn { font-size: 13.5px; }

  .site-foot__legal { flex-direction: column; align-items: flex-start; }
}

/* ---------- 17. 减弱动效 ---------- */
@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;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .masthead__nav { transition: none; }
}