/* =========================================================
   启博EPN · 品牌通道 V2.0 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

:root {
  --ink-900: #08131F;
  --navy-800: #0E2233;
  --navy-700: #12293C;
  --teal-jewel: #0F3B3A;
  --indigo-jewel: #241E45;
  --wine-jewel: #6E1F33;
  --cyan: #3FD6C4;
  --amber: #F2A03D;
  --mist-a: #7F97A8;
  --mist-b: #C9D8E0;
  --paper: #F4F1EA;
  --graphite: #101418;
  --slate: #93A3AE;

  --line: rgba(147, 163, 174, 0.30);
  --line-strong: rgba(147, 163, 174, 0.55);
  --cyan-line: rgba(63, 214, 196, 0.45);
  --amber-line: rgba(242, 160, 61, 0.45);

  --shadow: 6px 6px 0 rgba(0, 0, 0, 0.45);
  --shadow-sm: 4px 4px 0 rgba(0, 0, 0, 0.40);
  --shadow-cyan: 6px 6px 0 rgba(63, 214, 196, 0.18);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono",
    "Courier New", monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --width: 1240px;
  --gutter: clamp(28px, 6vw, 72px);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: var(--ink-900);
}

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, svg, video { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--amber); }

/* ---------- 中文排版 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-stretch: semi-condensed;
  text-wrap: balance;
}
h1 { font-size: clamp(34px, 4.8vw, 62px); line-height: 0.98; }
h2 { font-size: clamp(24px, 3.2vw, 38px); }
h3 { font-size: clamp(18px, 2.1vw, 24px); letter-spacing: -0.01em; }
h4 { font-size: 16px; letter-spacing: 0.02em; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
li { margin-bottom: 0.35em; }

strong, b { font-weight: 700; }
small { font-size: 0.82em; }

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

/* ---------- 焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}
.panel--note :focus-visible,
.panel--note a:focus-visible { outline-color: var(--indigo-jewel); }

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink-900);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.04em;
  border: 2px solid var(--ink-900);
  transition: top 160ms var(--ease);
}
.skip-link:focus { top: 12px; color: var(--ink-900); }

/* =========================================================
   头部
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--ink-900);
  color: var(--paper);
  border-bottom: 2px solid var(--line-strong);
}

.site-header::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--cyan) 0 34%,
    var(--indigo-jewel) 34% 68%,
    var(--wine-jewel) 68% 100%
  );
  pointer-events: none;
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 2;
  pointer-events: none;
  will-change: transform;
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 40px);
  width: min(1440px, calc(100% - clamp(24px, 4vw, 56px)));
  margin-inline: auto;
  padding-block: 15px 13px;
  transition: padding-block 240ms var(--ease);
}
.site-header.is-compact .header-inner { padding-block: 9px 8px; }

/* 品牌 */
.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 0 0 auto;
  color: var(--paper);
  text-decoration: none;
}
.brand:hover { color: var(--paper); }
.brand-word {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.035em;
  font-stretch: condensed;
}
.brand-sub {
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.18em;
  color: var(--slate);
  text-transform: uppercase;
  transition: font-size 240ms var(--ease), letter-spacing 240ms var(--ease);
}
.brand:hover .brand-word { color: var(--cyan); }
.site-header.is-compact .brand-word { font-size: clamp(18px, 2vw, 22px); }
.site-header.is-compact .brand-sub { font-size: 10px; letter-spacing: 0.14em; }

/* 刻度线 */
.header-scale {
  flex: 1 1 auto;
  min-width: 32px;
  height: 16px;
  align-self: center;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line-strong) 0 1px,
    transparent 1px 12px
  );
  border-bottom: 1px solid var(--line);
  opacity: 0.85;
}

/* 桌面导航 */
.nav-desk { flex: 0 0 auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.7vw, 26px);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-item { margin: 0; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 8px 2px;
  font-size: 14px;
  letter-spacing: 0.03em;
  line-height: 1.2;
  color: var(--paper);
  text-decoration: none;
  transition: color 180ms var(--ease);
}
.nav-link-text { display: inline-block; }
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 180ms var(--ease);
}
.nav-link:hover { color: var(--cyan); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--cyan); }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--amber);
}
.nav-dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-left: 6px;
  border-radius: 50%;
  background: var(--cyan);
  vertical-align: middle;
}

/* 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 12px;
  background: transparent;
  border: 2px solid var(--line-strong);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.14em;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle-text { line-height: 1; }
.nav-toggle-mark {
  position: relative;
  display: inline-block;
  width: 16px;
  height: 12px;
}
.nav-toggle-mark::before,
.nav-toggle-mark::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform 200ms var(--ease), top 200ms var(--ease);
}
.nav-toggle-mark::before { top: 1px; }
.nav-toggle-mark::after { top: 9px; }
.site-header[data-open="true"] .nav-toggle { border-color: var(--cyan); color: var(--cyan); }
.site-header[data-open="true"] .nav-toggle-mark::before {
  top: 5px;
  transform: rotate(45deg);
}
.site-header[data-open="true"] .nav-toggle-mark::after {
  top: 5px;
  transform: rotate(-45deg);
}

/* 移动抽屉 */
.nav-drawer { display: none; }
.nav-drawer-nav { width: 100%; }
.nav-drawer-note {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  background: var(--ink-900);
  color: var(--paper);
  border-top: 2px solid var(--line-strong);
  margin-top: clamp(48px, 7vw, 96px);
}

.footer-rule {
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--teal-jewel) 0 42%,
    var(--indigo-jewel) 42% 76%,
    var(--wine-jewel) 76% 100%
  );
}

.footer-inner {
  width: min(var(--width), calc(100% - var(--gutter)));
  margin-inline: auto;
  padding-block: clamp(36px, 5vw, 60px) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1.25fr 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.footer-col { min-width: 0; }
.footer-col + .footer-col {
  border-left: 1px solid var(--line);
  padding-left: clamp(14px, 2vw, 24px);
}

.footer-col--brand { display: flex; flex-direction: column; }

.footer-brand {
  display: inline-block;
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--paper);
  text-decoration: none;
  font-stretch: condensed;
}
.footer-brand:hover { color: var(--cyan); }

.footer-brand-sub {
  margin: 8px 0 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}

.footer-icp {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist-a);
  border-left: 3px solid var(--wine-jewel);
  padding-left: 10px;
  line-height: 1.5;
}

.footer-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  line-height: 1.2;
}
.footer-head::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--amber);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-list li { margin-bottom: 9px; }
.footer-list li:last-child { margin-bottom: 0; }

.footer-link {
  display: inline-block;
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.footer-link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.footer-list--meta { font-family: var(--font-mono); }
.footer-mono {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist-b);
  border-bottom: 1px dashed var(--line-strong);
  padding-bottom: 1px;
  word-break: break-all;
}
.footer-addr {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-b);
}

.footer-bottom {
  margin-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line);
  padding-block: 16px 22px;
}
.footer-index {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.9;
  color: var(--slate);
  font-family: var(--font-mono);
}

/* =========================================================
   通用布局
   ========================================================= */
.container {
  width: min(var(--width), calc(100% - var(--gutter)));
  margin-inline: auto;
}

.section { padding-block: clamp(44px, 6.5vw, 92px); }
.section:first-child { padding-top: clamp(28px, 4vw, 48px); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* =========================================================
   画板 / 面板
   ========================================================= */
.panel {
  position: relative;
  border: 2px solid var(--line-strong);
  background: var(--navy-800);
  color: var(--paper);
  padding: clamp(20px, 3vw, 34px);
  box-shadow: var(--shadow);
  transition: border-color 200ms var(--ease);
}
.panel:hover { border-color: var(--cyan-line); }

.panel--archive { background: var(--navy-800); color: var(--paper); }

.panel--note {
  background: var(--paper);
  color: var(--graphite);
  border-color: var(--navy-800);
  box-shadow: 6px 6px 0 rgba(14, 34, 51, 0.55);
}
.panel--note h1,
.panel--note h2,
.panel--note h3,
.panel--note h4 { color: var(--graphite); }
.panel--note a { color: #0A5F58; }
.panel--note a:hover { color: var(--wine-jewel); }

.panel--path {
  background: var(--indigo-jewel);
  color: var(--mist-b);
  border-color: var(--cyan-line);
}
.panel--path a { color: var(--cyan); }

.panel--teal {
  background: var(--teal-jewel);
  color: var(--mist-b);
  border-color: var(--cyan-line);
}

.panel--wine {
  background: var(--wine-jewel);
  color: #F7E9EC;
  border-color: var(--amber-line);
}

.panel--cut::after {
  content: "";
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 16px;
  height: 16px;
  background: var(--ink-900);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.panel-title {
  margin: 0;
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.panel-body { font-size: 16px; }

/* =========================================================
   文本原子
   ========================================================= */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  font-family: var(--font-mono);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--amber);
  flex: 0 0 auto;
}
.panel--note .eyebrow { color: var(--teal-jewel); }

.lead {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.7;
  color: var(--mist-b);
  max-width: 34em;
}
.panel--note .lead { color: #2A333B; }

.prose { max-width: 62ch; }
.prose p { max-width: 62ch; }

.quote-line {
  margin: 0;
  padding: 4px 0 4px 16px;
  border-left: 3px solid var(--amber);
  font-weight: 500;
  line-height: 1.75;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.94em;
  letter-spacing: 0.02em;
}
.mono-anchor {
  font-family: var(--font-mono);
  font-size: 0.94em;
  letter-spacing: 0.02em;
  color: var(--cyan);
  border-bottom: 2px solid var(--cyan);
  padding-bottom: 1px;
  text-decoration: none;
}
.mono-anchor:hover {
  color: var(--ink-900);
  background: var(--cyan);
}

.num-list {
  list-style: none;
  counter-reset: num;
  margin: 0;
  padding: 0;
}
.num-list li {
  counter-increment: num;
  position: relative;
  padding-left: 36px;
  margin-bottom: 14px;
}
.num-list li:last-child { margin-bottom: 0; }
.num-list li::before {
  content: counter(num, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.28em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--amber);
  border-bottom: 2px solid var(--amber-line);
  line-height: 1.3;
}

.hint {
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--slate);
}
.panel--note .hint { color: #5A6670; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--mist-b);
  white-space: nowrap;
}
.tag--cyan { border-color: var(--cyan-line); color: var(--cyan); }
.tag--amber { border-color: var(--amber-line); color: var(--amber); }

/* =========================================================
   按钮
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.72em 1.2em;
  border: 2px solid var(--cyan);
  background: transparent;
  color: var(--cyan);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.3;
  text-decoration: none;
  box-shadow: var(--shadow-cyan);
  transition: transform 160ms var(--ease), box-shadow 160ms var(--ease),
    background-color 160ms var(--ease), color 160ms var(--ease);
  cursor: pointer;
}
.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(63, 214, 196, 0.24);
  color: var(--cyan);
  background: rgba(63, 214, 196, 0.10);
}
.btn:active { transform: translate(0, 0); box-shadow: var(--shadow-sm); }

.btn--primary {
  background: var(--cyan);
  color: var(--ink-900);
  border-color: var(--cyan);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.55);
}
.btn--primary:hover {
  background: var(--cyan);
  color: var(--ink-900);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.6);
}

.btn--amber {
  border-color: var(--amber);
  color: var(--amber);
  box-shadow: 6px 6px 0 rgba(242, 160, 61, 0.20);
}
.btn--amber:hover {
  background: var(--amber);
  color: var(--ink-900);
  box-shadow: 8px 8px 0 rgba(242, 160, 61, 0.24);
}

.btn--ghost {
  border-color: var(--line-strong);
  color: var(--paper);
  box-shadow: var(--shadow-sm);
}
.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: transparent;
}
.panel--note .btn--ghost { color: var(--graphite); border-color: var(--navy-800); }

/* =========================================================
   面包屑
   ========================================================= */
.breadcrumb {
  padding-block: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 34px);
}
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.8;
  color: var(--slate);
}
.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line-strong);
}
.breadcrumb-link {
  color: var(--mist-b);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.breadcrumb-link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.breadcrumb-item[aria-current="page"] { color: var(--amber); }

/* =========================================================
   图片容器（页面阶段放置占位）
   ========================================================= */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--line-strong);
  background: var(--navy-800);
  box-shadow: var(--shadow);
  margin: 0;
}
.media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-fill {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--navy-800) 0%, var(--teal-jewel) 100%);
}
.media-frame--ratio-16-9 { aspect-ratio: 16 / 9; }
.media-frame--ratio-4-3 { aspect-ratio: 4 / 3; }
.media-frame--ratio-1-1 { aspect-ratio: 1 / 1; }
.media-frame--slice {
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - 18px),
    calc(100% - 18px) 100%,
    0 100%
  );
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(63, 214, 196, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63, 214, 196, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
}
.media-frame figcaption {
  position: relative;
  z-index: 2;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist-b);
  border-top: 2px solid var(--line-strong);
  background: var(--navy-800);
}

/* =========================================================
   主题筛选
   ========================================================= */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 2px solid var(--line-strong);
  background: var(--navy-800);
  box-shadow: var(--shadow-sm);
}
.filter-btn {
  appearance: none;
  padding: 8px 14px;
  border: 2px solid transparent;
  background: transparent;
  color: var(--mist-b);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 1.3;
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease),
    background-color 160ms var(--ease);
}
.filter-btn:hover { border-color: var(--cyan-line); color: var(--cyan); }
.filter-btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
  box-shadow: 4px 4px 0 rgba(63, 214, 196, 0.25);
}
.filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.is-filtered-out { display: none !important; }

@keyframes filterFade {
  from { opacity: 0; }
  to { opacity: 1; }
}
.is-flash { animation: filterFade 180ms ease-out both; }

/* =========================================================
   入场
   ========================================================= */
html[data-reveal-ready] .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 260ms var(--ease), transform 260ms var(--ease);
  will-change: opacity, transform;
}
html[data-reveal-ready] .reveal.is-in {
  opacity: 1;
  transform: none;
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px 24px; }
  .footer-col + .footer-col { padding-left: 0; }
  .footer-col:nth-child(even) {
    border-left: 1px solid var(--line);
    padding-left: 20px;
  }
  .span-3 { grid-column: span 6; }
  .span-4 { grid-column: span 6; }
  .span-5 { grid-column: span 12; }
  .span-7 { grid-column: span 12; }
  .span-8 { grid-column: span 12; }
}

@media (max-width: 900px) {
  .header-inner {
    width: calc(100% - 32px);
    gap: 16px;
    padding-block: 12px 11px;
  }
  .site-header.is-compact .header-inner { padding-block: 9px 8px; }
  .header-scale { display: none; }
  .nav-desk { display: none; }
  .nav-toggle { display: inline-flex; }

  .nav-drawer {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 3;
    background: var(--navy-800);
    border-bottom: 2px solid var(--cyan);
    box-shadow: 0 20px 0 rgba(8, 19, 31, 0.55), 0 30px 40px rgba(8, 19, 31, 0.6);
    padding: 14px 20px 22px;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 200ms var(--ease), transform 200ms var(--ease),
      visibility 0s linear 200ms;
  }
  .site-header[data-open="true"] .nav-drawer {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0s;
  }

  .nav-list--stack {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-list--stack .nav-item {
    margin: 0;
    border-bottom: 1px solid var(--line);
  }
  .nav-list--stack .nav-item:last-child { border-bottom: 0; }
  .nav-list--stack .nav-link {
    width: 100%;
    justify-content: space-between;
    padding: 14px 12px;
    font-size: 15px;
    letter-spacing: 0.02em;
  }
  .nav-list--stack .nav-link::after { display: none; }
  .nav-list--stack .nav-link:hover { color: var(--cyan); background: rgba(63, 214, 196, 0.06); }
  .nav-list--stack .nav-link[aria-current="page"] {
    color: var(--cyan);
    background: rgba(242, 160, 61, 0.08);
    box-shadow: inset 3px 0 0 var(--amber);
  }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-col + .footer-col {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 22px;
  }
  .footer-col:nth-child(even) {
    border-left: 0;
    padding-left: 0;
  }
  .footer-icp { margin-top: 14px; }
  .filter-count { margin-left: 0; width: 100%; padding-top: 4px; }
  .breadcrumb { padding-block: 12px; }
}

@media (max-width: 640px) {
  .span-3,
  .span-4,
  .span-5,
  .span-6,
  .span-7,
  .span-8,
  .span-12 { grid-column: span 12; }
  .panel { padding: 18px; }
  .media-frame { box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.45); }
  .btn { width: 100%; }
  .filter-btn { flex: 1 1 auto; }
}

/* =========================================================
   动效偏好
   ========================================================= */
@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;
    scroll-behavior: auto !important;
  }
  html[data-reveal-ready] .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn:hover { transform: none; }
  .scroll-progress { transition: none; }
}

/* 打印 */
@media print {
  .site-header,
  .site-footer,
  .scroll-progress,
  .skip-link,
  .filter-bar { display: none !important; }
  body { background: #fff; color: #000; }
}