/* ==========================================================================
   MIXUE. — YOUR SSH GATEWAY.
   Retro hacker terminal / CRT green phosphor.
   目录：令牌 → 基础 → CRT 层 → 布局 → 组件 → 响应式 → 动效降级
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --bg: #080b08;
  --bg-2: #0b110b;
  --panel: #101810;
  --panel-2: #0c130c;

  --green: #39ff14;
  --green-soft: #a0ff8f;
  --muted: #7a8b78;
  --text: #d7e8d2;

  --line: rgba(57, 255, 20, 0.18);
  --line-soft: rgba(57, 255, 20, 0.08);
  --line-strong: rgba(57, 255, 20, 0.42);

  --radius: 10px;
  --maxw: 1080px;

  --mono: "JetBrains Mono", "Fira Code", "IBM Plex Mono", ui-monospace,
    SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --cjk: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    sans-serif;

  color-scheme: dark;
}

/* ---------- 2. 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1100px 600px at 50% -10%, rgba(57, 255, 20, 0.07), transparent 70%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  color: var(--text);
  font-family: var(--mono), var(--cjk);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1,
h2,
h3,
p,
ul,
figure {
  margin: 0;
}

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

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

button,
input {
  font: inherit;
  color: inherit;
}

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

code {
  font-family: var(--mono);
}

::selection {
  background: rgba(57, 255, 20, 0.26);
  color: #f4fff0;
}

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

* {
  scrollbar-width: thin;
  scrollbar-color: rgba(57, 255, 20, 0.28) transparent;
}
*::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
*::-webkit-scrollbar-thumb {
  background: rgba(57, 255, 20, 0.26);
  border-radius: 99px;
}
*::-webkit-scrollbar-track {
  background: transparent;
}

/* 仅供读屏 */
.sr-only {
  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;
}

/* 跳过导航 */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.6rem 0.9rem;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  color: var(--green);
  font-size: 0.75rem;
}

.skip:focus {
  left: 1rem;
  top: 0.6rem;
}

/* ---------- 3. CRT 覆盖层 ---------- */
.crt {
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
}

.crt__scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.3) 0 1px,
    rgba(0, 0, 0, 0) 1px 3px
  );
  opacity: 0.55;
}

.crt__noise {
  position: absolute;
  inset: -60%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  opacity: 0.03;
  animation: crt-noise 1.1s steps(3) infinite;
}

.crt__vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(57, 255, 20, 0.05), transparent 62%),
    radial-gradient(100% 100% at 50% 45%, transparent 52%, rgba(0, 0, 0, 0.62));
}

@keyframes crt-noise {
  0% {
    transform: translate3d(0, 0, 0);
  }
  33% {
    transform: translate3d(-2%, 1%, 0);
  }
  66% {
    transform: translate3d(1%, -2%, 0);
  }
  100% {
    transform: translate3d(0, 0, 0);
  }
}

/* ---------- 4. 布局 ---------- */
.shell {
  position: relative;
  z-index: 1;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

.sec {
  padding-block: clamp(2.4rem, 6vw, 3.8rem);
  border-top: 1px solid var(--line-soft);
}

.sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 1.5rem;
}

.sec__title {
  font-size: clamp(0.86rem, 1.6vw, 0.98rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--green);
  text-transform: uppercase;
}

.sec__title::before {
  content: "> ";
  color: var(--muted);
}

.sec__note {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ---------- 5. 通用小件 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.18rem 0.52rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(57, 255, 20, 0.03);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
  white-space: nowrap;
}

.chip--ready {
  color: var(--green);
  border-color: var(--line-strong);
  background: rgba(57, 255, 20, 0.07);
}

.chip__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

.chip--ready .chip__dot {
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 40px;
  padding: 0.6rem 0.95rem;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: rgba(57, 255, 20, 0.05);
  color: var(--green);
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease,
    box-shadow 0.18s ease, color 0.18s ease;
}

.btn:hover {
  background: rgba(57, 255, 20, 0.13);
  border-color: var(--green);
  color: var(--green-soft);
  box-shadow: 0 0 22px -8px rgba(57, 255, 20, 0.7);
}

.btn--ghost {
  border-color: var(--line);
  background: transparent;
  color: var(--muted);
  font-size: 0.68rem;
  min-height: 32px;
  padding: 0.4rem 0.7rem;
}

.btn--ghost:hover {
  color: var(--green);
  border-color: var(--line-strong);
  background: rgba(57, 255, 20, 0.07);
  box-shadow: none;
}

/* 终端窗口外壳：服务卡片、Hero、About 共用 */
.win {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  overflow: hidden;
}

.win__bar {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(57, 255, 20, 0.035);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

.win__dots {
  display: flex;
  gap: 0.28rem;
  flex: none;
}

.win__dots i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  display: block;
}

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

.win__bar-end {
  margin-left: auto;
  flex: none;
}

/* ---------- 6. 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 70;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 11, 8, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 62px;
}

.brand {
  display: inline-flex;
  align-items: center;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text);
  white-space: nowrap;
}

.brand:hover {
  color: var(--green-soft);
}

.brand__cursor {
  display: inline-block;
  width: 0.5em;
  height: 1em;
  margin-left: 0.16em;
  background: var(--green);
  vertical-align: -0.1em;
  animation: blink 1.06s steps(1) infinite;
}

@keyframes blink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

.nav__right {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav__link {
  position: relative;
  padding: 0.25rem 0;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
  transition: color 0.18s ease;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}

.nav__link:hover,
.nav__link[aria-current="true"] {
  color: var(--green-soft);
}

.nav__link:hover::after,
.nav__link[aria-current="true"]::after {
  transform: scaleX(1);
}

.nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  color: var(--green);
  cursor: pointer;
}

.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.nav__toggle span {
  position: relative;
}

.nav__toggle span::before,
.nav__toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav__toggle span::before {
  top: -5px;
}

.nav__toggle span::after {
  top: 5px;
}

.nav__toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav__toggle[aria-expanded="true"] span::before {
  transform: translateY(5px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span::after {
  transform: translateY(-5px) rotate(-45deg);
}

.nav__menu {
  display: none;
}

/* ---------- 7. Hero ---------- */
.hero {
  padding-block: clamp(2.6rem, 7vw, 5rem) clamp(2rem, 5vw, 3.4rem);
}

.hero__eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}

.hero__title {
  font-size: clamp(2rem, 7.2vw, 4rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-shadow: 0 0 28px rgba(57, 255, 20, 0.22);
}

.hero__title em {
  font-style: normal;
  color: var(--green);
}

.hero__sub {
  margin-top: 0.9rem;
  font-size: clamp(0.86rem, 2vw, 1rem);
  color: var(--muted);
  letter-spacing: 0.02em;
}

.hero__lines {
  margin-top: 0.9rem;
  max-width: 46ch;
  font-size: 0.82rem;
  line-height: 1.9;
  color: var(--muted);
}

.hero__lines strong {
  color: var(--text);
  font-weight: 600;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(1.8rem, 4vw, 2.6rem);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.4rem;
}

/* 打字终端 */
.term {
  min-height: 210px;
  padding: 1rem 1rem 1.1rem;
  font-size: 0.8rem;
  line-height: 1.85;
  letter-spacing: 0.01em;
}

.term__line {
  display: flex;
  gap: 0.5rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.term__prompt {
  flex: none;
  color: var(--green);
}

.term__prompt b {
  color: var(--green-soft);
  font-weight: 500;
}

.term__cmd {
  color: var(--text);
}

.term__out {
  color: var(--muted);
}

.term__ok {
  color: var(--green);
}

.term__caret {
  display: inline-block;
  width: 0.52em;
  height: 1.02em;
  margin-left: 0.1em;
  background: var(--green);
  vertical-align: -0.18em;
  animation: blink 1.06s steps(1) infinite;
}

/* ---------- 8. 服务卡片 ---------- */
.services {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
}

.card {
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, box-shadow 0.24s ease, transform 0.24s ease;
}

.card:hover,
.card:focus-within {
  border-color: var(--line-strong);
  box-shadow:
    0 0 0 1px rgba(57, 255, 20, 0.2),
    0 26px 52px -34px rgba(57, 255, 20, 0.65);
  transform: translateY(-2px);
}

.card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.15rem 1.05rem 1.1rem;
}

.card__name {
  font-size: 1.22rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.3;
}

.card__desc {
  font-size: 0.84rem;
  color: var(--text);
}

.card__zh {
  font-family: var(--cjk);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line);
}

.card__host {
  font-size: 0.66rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- 9. 系统信息 ---------- */
.sys {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
  overflow: hidden;
}

.sys__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.78rem 1rem;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

.sys__row:nth-child(odd) {
  border-right: 1px solid var(--line-soft);
}

.sys__row:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.sys__k {
  color: var(--muted);
  text-transform: uppercase;
  white-space: nowrap;
}

.sys__v {
  color: var(--text);
  text-align: right;
  word-break: break-word;
}

.sys__v--ready {
  color: var(--green);
}

/* ---------- 10. 模拟终端 ---------- */
.console {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
  overflow: hidden;
  box-shadow: inset 0 0 60px -30px rgba(57, 255, 20, 0.35);
}

.console__out {
  height: 300px;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.95rem 1rem 0.5rem;
  font-size: 0.79rem;
  line-height: 1.8;
}

.console__line {
  display: flex;
  gap: 0.5rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.console__line--in {
  color: var(--text);
}

.console__line--out {
  color: var(--muted);
}

.console__line--ok {
  color: var(--green-soft);
}

.console__line--err {
  color: #ff6f5e;
}

.console__line--dim {
  color: rgba(122, 139, 120, 0.72);
}

.console__form {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1rem 0.8rem;
  border-top: 1px solid var(--line-soft);
  background: rgba(57, 255, 20, 0.035);
}

.console__prompt {
  flex: none;
  font-size: 0.79rem;
  color: var(--green);
  white-space: nowrap;
}

.console__input {
  flex: 1;
  min-width: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.79rem;
  letter-spacing: 0.01em;
  caret-color: var(--green);
  outline: none;
}

.console__input::placeholder {
  color: rgba(122, 139, 120, 0.55);
}

.console__hint {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  margin-top: 0.75rem;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.console__hint b {
  color: var(--green-soft);
  font-weight: 600;
}

/* 区块底部说明 */
.note {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.1rem;
  margin-top: 1rem;
  font-size: 0.7rem;
  line-height: 1.9;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.note b {
  color: var(--green-soft);
  font-weight: 600;
}

/* ---------- 11. 命令速查 ---------- */
.cmds {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
  overflow: hidden;
}

.cmd {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.25rem 1rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--line-soft);
}

.cmd:last-child {
  border-bottom: 0;
}

.cmd__code {
  grid-column: 1;
  grid-row: 1;
  overflow-x: auto;
  white-space: nowrap;
  padding-bottom: 2px;
  font-size: 0.82rem;
  color: var(--green-soft);
  -webkit-overflow-scrolling: touch;
}

.cmd__code::-webkit-scrollbar {
  height: 4px;
}

.cmd__desc {
  grid-column: 1;
  grid-row: 2;
  font-family: var(--cjk);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.cmd__copy {
  grid-column: 2;
  grid-row: 1 / span 2;
}

.cmd__copy[data-copied="true"] {
  color: var(--green);
  border-color: var(--green);
  background: rgba(57, 255, 20, 0.14);
}

/* ---------- 12. About / Footer ---------- */
.about {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(1.2rem, 4vw, 2.6rem);
  align-items: start;
}

.about__text {
  font-size: 0.86rem;
  color: var(--text);
  line-height: 1.9;
}

.about__text + .about__text {
  margin-top: 0.8rem;
  color: var(--muted);
}

.about__mantra {
  margin-top: 1.1rem;
  padding-left: 0.9rem;
  border-left: 1px solid var(--line-strong);
  font-size: 0.8rem;
  line-height: 2;
  color: var(--green-soft);
}

.foot {
  padding-block: 1.8rem 2.2rem;
  border-top: 1px solid var(--line);
  background: rgba(8, 11, 8, 0.6);
}

.foot__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem 1.5rem;
}

.foot__brand {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.foot__brand span {
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.foot__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 1rem;
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}

/* 复制提示 */
.toast {
  position: fixed;
  left: 50%;
  bottom: 1.4rem;
  z-index: 95;
  transform: translate(-50%, 12px);
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: rgba(12, 19, 12, 0.96);
  box-shadow: 0 0 26px -10px rgba(57, 255, 20, 0.8);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--green);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast[data-show="true"] {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- 13. 入场 ---------- */
.fade-up {
  animation: fade-up 0.55s ease both;
}

.fade-up.d1 {
  animation-delay: 0.06s;
}

.fade-up.d2 {
  animation-delay: 0.14s;
}

.fade-up.d3 {
  animation-delay: 0.22s;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 960px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

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

@media (max-width: 860px) {
  html {
    scroll-padding-top: 74px;
  }

  .nav__toggle {
    display: inline-flex;
  }

  .nav__right {
    gap: 0.6rem;
  }

  .nav__links {
    display: none;
  }

  .nav__menu {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    border-bottom: 1px solid var(--line);
    background: rgba(8, 11, 8, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.26s ease;
  }

  .nav__menu[data-open="true"] {
    max-height: 340px;
  }

  .nav__menu ul {
    display: flex;
    flex-direction: column;
    padding: 0.4rem clamp(1rem, 4vw, 2.5rem) 1rem;
  }

  .nav__menu .nav__link {
    display: block;
    padding: 0.7rem 0;
    font-size: 0.78rem;
    border-bottom: 1px solid var(--line-soft);
  }

  .nav__menu .nav__link::after {
    display: none;
  }

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

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

  .sys__row {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .sys__row:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--line-soft);
  }

  .sys__row:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .hero {
    padding-block: 1.9rem 1.6rem;
  }

  .hero__title {
    font-size: clamp(1.8rem, 9vw, 2.4rem);
  }

  .term {
    min-height: 232px;
    font-size: 0.74rem;
    line-height: 1.8;
  }

  .console__out {
    height: 252px;
    font-size: 0.74rem;
  }

  .console__input,
  .console__prompt {
    font-size: 0.74rem;
  }

  .cmd {
    padding: 0.75rem 0.8rem;
  }

  .card__foot {
    flex-wrap: wrap;
  }

  .card__host {
    width: 100%;
    order: 2;
  }

  .toast {
    left: 1rem;
    right: 1rem;
    transform: translateY(12px);
    text-align: center;
  }

  .toast[data-show="true"] {
    transform: none;
  }
}

/* ---------- 15. 动效降级 ---------- */
@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;
  }

  .crt__noise {
    display: none;
  }

  .card:hover,
  .card:focus-within {
    transform: none;
  }

  .brand__cursor,
  .term__caret {
    animation: none;
    opacity: 1;
  }
}