/* =========================================================
   飞禽走兽电玩 · /assets/site.css
   共享层：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }

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

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

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

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

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

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

hr { border: 0; }

:root {
  /* 色彩 */
  --ink-900: #06110E;
  --ink-800: #0B1F1A;
  --ink-700: #12352C;
  --ink-600: #18453A;
  --cyan-500: #35E0D0;
  --cyan-600: #1FA89A;
  --cyan-100: #BFF7EF;
  --gold-500: #E8B04B;
  --gold-300: #F6D79B;
  --red-500: #C7442E;
  --red-200: #F0A492;
  --paper: #F3EAD8;
  --paper-dim: #E2D5BC;
  --sage: #9DB8AE;

  /* 字体 */
  --font-title: "HarmonyOS Sans SC", "PingFang SC", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: -apple-system, "PingFang SC", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", "Fira Code", "Cascadia Mono", Consolas, "Liberation Mono", "Courier New", monospace;

  /* 尺寸与节奏 */
  --w-max: 1320px;
  --pad-x: clamp(16px, 4vw, 48px);
  --r-lg: 32px;
  --r-md: 20px;
  --r-sm: 12px;
  --pill: 999px;

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .24s;
}

::selection { background: var(--cyan-500); color: var(--ink-900); }

:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 3px;
  border-radius: 4px;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--ink-900); }
::-webkit-scrollbar-thumb {
  background: var(--ink-600);
  border-radius: 99px;
  border: 2px solid var(--ink-900);
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--ink-800);
  background-image:
    linear-gradient(90deg, rgba(53, 224, 208, .045) 1px, transparent 1px),
    linear-gradient(0deg, rgba(53, 224, 208, .045) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: .05em;
  color: var(--paper);
}

h1 { font-size: clamp(36px, 5.6vw, 68px); }
h2 { font-size: clamp(26px, 3.4vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 26px); letter-spacing: .04em; }

p { max-width: 72ch; }

strong { color: var(--cyan-500); font-weight: 700; }

code, kbd, samp, .mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

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

/* ---------------- 跳转链接 ---------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 14px;
  z-index: 240;
  padding: 10px 20px;
  border-radius: var(--pill);
  background: var(--gold-500);
  color: var(--ink-900);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 14px; }

/* =========================================================
   头部
   ========================================================= */
.site-header {
  position: relative;
  z-index: 60;
  background: var(--ink-800);
}

/* --- 顶部信息带 --- */
.ticker {
  background: var(--ink-900);
  border-bottom: 1px solid rgba(53, 224, 208, .18);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

.ticker__inner {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 8px var(--pad-x);
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.ticker__note {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  max-width: none;
  color: var(--sage);
}

.ticker__dot {
  flex: 0 0 auto;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan-500);
  box-shadow: 0 0 0 3px rgba(53, 224, 208, .16), 0 0 12px rgba(53, 224, 208, .8);
  animation: ticker-pulse 2.8s ease-in-out infinite;
}

@keyframes ticker-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .45; transform: scale(.82); }
}

.ticker__label {
  flex: 0 0 auto;
  color: var(--gold-500);
  letter-spacing: .16em;
}

.ticker__text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.utility-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

.utility-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: var(--pill);
  border: 1px solid rgba(53, 224, 208, .26);
  color: var(--cyan-100);
  letter-spacing: .06em;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.utility-nav__link:hover {
  background: rgba(53, 224, 208, .14);
  border-color: rgba(53, 224, 208, .6);
  color: #fff;
}
.utility-nav__link--gold {
  background: var(--gold-500);
  border-color: var(--gold-500);
  color: var(--ink-900);
  font-weight: 700;
}
.utility-nav__link--gold:hover {
  background: var(--gold-300);
  border-color: var(--gold-300);
  color: var(--ink-900);
}

/* --- 主栏 --- */
.masthead {
  position: relative;
  background:
    radial-gradient(120% 180% at 8% -40%, rgba(53, 224, 208, .16), transparent 62%),
    linear-gradient(180deg, rgba(11, 31, 26, .98), rgba(6, 17, 14, .96));
  border-bottom: 1px solid rgba(53, 224, 208, .18);
}
.masthead::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan-500), rgba(53, 224, 208, .05) 40%, transparent 70%);
  opacity: .55;
}

.masthead__inner {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 15px var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* --- 品牌 --- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  border-radius: var(--r-md);
}
.brand:hover .brand__glyph {
  border-color: var(--gold-500);
  box-shadow: inset 0 0 0 1px rgba(6, 17, 14, .6), 0 0 22px rgba(232, 176, 75, .42);
}

.brand__glyph {
  position: relative;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 22%, rgba(53, 224, 208, .45), transparent 66%),
    var(--ink-700);
  border: 1px solid rgba(53, 224, 208, .42);
  box-shadow: inset 0 0 0 1px rgba(6, 17, 14, .6), 0 0 18px rgba(53, 224, 208, .24);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.brand__wing {
  position: absolute;
  top: 50%;
  width: 17px;
  height: 11px;
  background: var(--cyan-500);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  opacity: .92;
}
.brand__wing--l { transform: translate(-9px, -50%) scaleX(-1); }
.brand__wing--r { transform: translate(9px, -50%); }

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__mark {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: .07em;
  color: var(--paper);
}

.brand__latin {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan-600);
}

/* --- 主导航（右置胶囊组） --- */
.primary-nav { margin-left: auto; }

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

.nav-list__item { display: flex; }

.nav-list__link {
  position: relative;
  display: inline-block;
  padding: 9px 15px;
  border-radius: var(--pill);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .05em;
  color: var(--cyan-100);
  white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.nav-list__link:hover {
  background: rgba(53, 224, 208, .14);
  color: #fff;
}
.nav-list__link[aria-current="page"] {
  background: var(--cyan-500);
  color: var(--ink-900);
  font-weight: 700;
  box-shadow: 0 6px 18px -10px rgba(53, 224, 208, .95), inset 0 0 0 1px rgba(6, 17, 14, .35);
}

/* --- 移动菜单按钮 --- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border-radius: var(--pill);
  border: 1px solid rgba(53, 224, 208, .45);
  background: rgba(53, 224, 208, .09);
  color: var(--cyan-100);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-toggle:hover { background: rgba(53, 224, 208, .18); border-color: var(--cyan-500); }
.nav-toggle:active { transform: translateY(2px); }

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.site-header[data-open] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* --- 移动抽屉 --- */
.mobile-drawer { display: none; }

.mobile-drawer__inner {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 4px var(--pad-x) 20px;
}

.mobile-drawer__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.mobile-drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 16px;
  border-radius: var(--pill);
  border: 1px solid rgba(53, 224, 208, .22);
  background: rgba(53, 224, 208, .07);
  color: var(--cyan-100);
  font-size: 14px;
  letter-spacing: .05em;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.mobile-drawer__link::after {
  content: "›";
  font-family: var(--font-mono);
  color: var(--cyan-600);
}
.mobile-drawer__link:hover {
  background: rgba(53, 224, 208, .18);
  border-color: rgba(53, 224, 208, .55);
  color: #fff;
}
.mobile-drawer__link[aria-current="page"] {
  background: var(--cyan-500);
  border-color: var(--cyan-500);
  color: var(--ink-900);
  font-weight: 700;
}
.mobile-drawer__link[aria-current="page"]::after { color: rgba(6, 17, 14, .55); }

.mobile-drawer__steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed rgba(157, 184, 174, .32);
}

.step-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--pill);
  border: 1px solid rgba(53, 224, 208, .32);
  background: rgba(53, 224, 208, .1);
  color: var(--cyan-100);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.step-pill:hover { background: rgba(53, 224, 208, .22); border-color: var(--cyan-500); }
.step-pill--gold {
  background: var(--gold-500);
  border-color: var(--gold-500);
  color: var(--ink-900);
  font-weight: 700;
}
.step-pill--gold:hover { background: var(--gold-300); border-color: var(--gold-300); }

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 56%, #040C0A 100%);
  border-top: 1px solid rgba(53, 224, 208, .16);
  color: var(--paper);
}

.footer__glow {
  position: absolute;
  inset: auto -12% -70% -12%;
  height: 360px;
  background: radial-gradient(ellipse at 50% 100%, rgba(53, 224, 208, .18), transparent 70%);
  pointer-events: none;
}

.footer__inner {
  position: relative;
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: clamp(36px, 5vw, 64px) var(--pad-x) 28px;
}

.footer__top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px 32px;
  padding-bottom: 22px;
  border-bottom: 1px dashed rgba(157, 184, 174, .3);
}

.footer__brand-line {
  max-width: none;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 34px);
  letter-spacing: .06em;
  line-height: 1.2;
  color: var(--paper);
}

.footer__dot {
  display: inline-block;
  margin: 0 .38em;
  color: var(--gold-500);
}

.footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--sage);
}

.footer__meta-item {
  padding: 4px 10px;
  border-radius: var(--pill);
  border: 1px solid rgba(157, 184, 174, .28);
  background: rgba(157, 184, 174, .06);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(280px, 1.35fr);
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(28px, 4vw, 46px) 0;
}

.footer__col { min-width: 0; }

.footer__title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold-500);
}

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

.footer__link {
  display: inline-block;
  padding: 7px 0;
  font-size: 14.5px;
  color: var(--cyan-100);
  border-radius: 6px;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.footer__link:hover { color: var(--cyan-500); transform: translateX(4px); }

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-contact__row { display: grid; gap: 1px; }

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--sage);
}

.footer-contact__value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--cyan-100);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.footer-contact__value--mono {
  font-family: var(--font-mono);
  letter-spacing: .06em;
  color: var(--gold-500);
}

.footer-contact__note {
  margin-top: 16px;
  max-width: 42ch;
  padding: 10px 14px;
  border-left: 2px solid var(--cyan-600);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(53, 224, 208, .06);
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--sage);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(157, 184, 174, .18);
}

.footer__legal {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--sage);
}

.footer__small {
  max-width: none;
  font-size: 12px;
  color: rgba(157, 184, 174, .78);
}

/* =========================================================
   通用容器 / 网格 / 组件
   ========================================================= */
.container {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.container--narrow { max-width: 900px; }

.container--split {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
  display: grid;
  grid-template-columns: minmax(0, 38fr) minmax(0, 62fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: start;
}

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
}
.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)); }

.rule {
  height: 1px;
  margin-block: clamp(24px, 3vw, 40px);
  background: linear-gradient(90deg, rgba(53, 224, 208, .55), rgba(157, 184, 174, .16) 46%, transparent);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold-500);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: currentColor;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--pill);
  border: 1px solid rgba(53, 224, 208, .34);
  background: rgba(53, 224, 208, .13);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan-100);
  white-space: nowrap;
}
.tag--gold {
  border-color: rgba(232, 176, 75, .46);
  background: rgba(232, 176, 75, .15);
  color: var(--gold-300);
}
.tag--red {
  border-color: rgba(199, 68, 46, .52);
  background: rgba(199, 68, 46, .18);
  color: var(--red-200);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--pill);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .05em;
  line-height: 1.2;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease), transform .12s var(--ease);
}
.btn:active { transform: translateY(2px); }

.btn--gold {
  background: var(--gold-500);
  color: var(--ink-900);
  box-shadow: 0 12px 26px -16px rgba(232, 176, 75, .95);
}
.btn--gold:hover { background: var(--gold-300); }

.btn--cyan {
  background: var(--cyan-500);
  color: var(--ink-900);
  box-shadow: 0 12px 26px -16px rgba(53, 224, 208, .95);
}
.btn--cyan:hover { background: var(--cyan-100); }

.btn--ghost {
  background: rgba(53, 224, 208, .06);
  border-color: rgba(53, 224, 208, .48);
  color: var(--cyan-100);
}
.btn--ghost:hover {
  background: rgba(53, 224, 208, .16);
  border-color: var(--cyan-500);
  color: #fff;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sage);
}
.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb li + li::before {
  content: "/";
  color: rgba(157, 184, 174, .5);
}
.breadcrumb a { color: var(--cyan-100); }
.breadcrumb a:hover { color: var(--cyan-500); }
.breadcrumb [aria-current="page"] { color: var(--gold-500); }

.panel {
  background: var(--ink-700);
  border: 1px solid rgba(53, 224, 208, .18);
  border-radius: var(--r-lg);
  padding: clamp(18px, 2.4vw, 28px);
}
.panel--paper {
  background: var(--paper);
  border-color: rgba(6, 17, 14, .14);
  color: var(--ink-800);
}
.panel--paper :is(h2, h3, h4) { color: var(--ink-800); }

/* --- 图片容器基础规则（页面阶段使用） --- */
.media-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid rgba(53, 224, 208, .22);
  background:
    linear-gradient(135deg, var(--ink-700), var(--ink-900));
  aspect-ratio: 16 / 10;
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(circle at 76% 8%, rgba(53, 224, 208, .2), transparent 58%),
    linear-gradient(158deg, rgba(232, 176, 75, .1), transparent 46%);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(53, 224, 208, .07) 1px, transparent 1px),
    linear-gradient(0deg, rgba(53, 224, 208, .07) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: .7;
}
.media-frame__img,
.media-frame > img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame__tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  padding: 4px 11px;
  border-radius: var(--pill);
  background: var(--gold-500);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--hero { aspect-ratio: 16 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--slant {
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
}

/* --- 滚动显现（脚本开启时才生效） --- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* --- 滚动进度条（脚本注入） --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 220;
  width: 0;
  height: 3px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--cyan-500), var(--gold-500));
  box-shadow: 0 0 14px rgba(53, 224, 208, .75);
  transition: width .08s linear;
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .primary-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .mobile-drawer { display: none; }
  .site-header[data-open] .mobile-drawer { display: block; }

  .container--split { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .ticker__inner {
    flex-wrap: wrap;
    gap: 6px;
    padding-block: 7px;
  }
  .ticker__text {
    white-space: normal;
    font-size: 11px;
    line-height: 1.5;
  }
  .utility-nav { display: none; }

  .masthead__inner { padding-block: 12px; gap: 12px; }
  .brand { gap: 10px; }
  .brand__glyph { width: 36px; height: 36px; border-radius: 12px; }
  .brand__mark { font-size: 17px; }
  .brand__latin { font-size: 9px; letter-spacing: .18em; }
  .nav-toggle { padding: 9px 13px; font-size: 11px; }
}

@media (max-width: 620px) {
  h1 { font-size: clamp(32px, 9vw, 42px); }
  h2 { font-size: clamp(24px, 6.6vw, 30px); }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr; }
  .footer__top { align-items: flex-start; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .footer-contact__note { max-width: none; }
}

@media (max-width: 420px) {
  .mobile-drawer__grid { grid-template-columns: 1fr; }
  .mobile-drawer__steps { gap: 6px; }
  .step-pill { font-size: 11px; padding: 7px 11px; }
}

/* =========================================================
   可访问性：减少动态
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .ticker__dot { animation: none; opacity: 1; }

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

  .scroll-progress { transition: none; }

  .footer__link:hover,
  .btn:active,
  .nav-toggle:active { transform: none; }
}