/* ═══════════════════════════════════════════════════════════
   TRACY.ZHANG — terminal HUD aesthetic
   ═══════════════════════════════════════════════════════════ */

:root {
  /* 底色：不是纯黑，带一点冷调 */
  --bg:          #05080a;
  --bg-raised:   #0a0f13;
  --bg-panel:    #070c10;
  --bg-inset:    #030608;

  /* 主色：荧光绿（终端 CRT） */
  --green:       #00ff9c;
  --green-dim:   #00a866;
  --green-ghost: rgba(0, 255, 156, 0.08);

  /* 辅色：琥珀（警告/高亮） */
  --amber:       #ffb340;
  --amber-dim:   #b87d2a;

  /* 冷色：青（结构线/次要信息） */
  --cyan:        #4de3ff;
  --cyan-dim:    #2a8fa3;

  /* 危险：红（错误/强调） */
  --red:         #ff4d5e;

  /* 文本层级 */
  --text:        #c8f5e3;
  --text-mid:    #6b9c8a;
  --text-dim:    #3d5c52;
  --text-faint:  #23423a;

  /* 线条 */
  --line:        #14332b;
  --line-bright: #1f5646;

  /* 字体 */
  --mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
  --display: 'Chakra Petch', 'JetBrains Mono', sans-serif;

  --maxw: 1400px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.65;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  cursor: crosshair;
}

::selection { background: var(--green); color: var(--bg); }

/* ── 滚动条 ── */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-inset); }
::-webkit-scrollbar-thumb {
  background: var(--green-dim);
  border: 2px solid var(--bg-inset);
}
::-webkit-scrollbar-thumb:hover { background: var(--green); }

/* ═══════════ CRT 叠加层 ═══════════ */
.crt-overlay {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0px,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0.22) 3px,
    rgba(0, 0, 0, 0) 4px
  );
  opacity: 0.55;
}

.grain {
  position: fixed;
  inset: -50%;
  z-index: 9997;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-shift 0.22s steps(2) infinite;
}

@keyframes grain-shift {
  0%   { transform: translate(0, 0); }
  50%  { transform: translate(-2%, 1%); }
  100% { transform: translate(1%, -2%); }
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 9996;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 45%, rgba(0, 0, 0, 0.75) 100%);
}

/* ═══════════ 顶栏 ═══════════ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem clamp(1rem, 4vw, 3rem);
  background: rgba(5, 8, 10, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  font-size: 11.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.topbar__left, .topbar__right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.topbar__logo {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text);
}

.topbar__sep   { color: var(--text-faint); }
.topbar__host  { color: var(--text-dim); }
.topbar__locale { color: var(--text-dim); }
.topbar__status { color: var(--green); }

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

.clock {
  color: var(--amber);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse-dot 2.4s var(--ease) infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.35; transform: scale(0.78); }
}

/* ═══════════ 移动端导航 ═══════════ */
.mobile-nav { display: none; }

/* ═══════════ HERO ═══════════ */
.hero {
  position: relative;
  min-height: calc(100vh - 46px);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3rem, 8vh, 6rem) clamp(1rem, 4vw, 3rem) clamp(4rem, 10vh, 7rem);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

/* 背景网格 */
.hero__grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(0, 255, 156, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 156, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 65% at 30% 40%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 65% at 30% 40%, #000 0%, transparent 78%);
}

.hero__eyebrow {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 13px;
  color: var(--text-mid);
  margin-bottom: 1.6rem;
  min-height: 1.6em;
}

.prompt { color: var(--green); font-weight: 500; }
.hero__cmd { color: var(--amber); }

.caret {
  display: inline-block;
  width: 8px;
  height: 1.05em;
  background: var(--green);
  vertical-align: text-bottom;
  animation: blink 1.05s steps(2) infinite;
}

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

.hero__title {
  font-family: var(--display);
  font-size: clamp(2.6rem, 8.2vw, 6.2rem);
  font-weight: 700;
  line-height: 0.93;
  letter-spacing: -0.02em;
  margin: 0 0 1.8rem;
  text-transform: uppercase;
}

.hero__title .line {
  display: block;
  opacity: 0;
  transform: translateY(28px);
  animation: line-in 0.85s var(--ease) forwards;
}

.hero__title .line--1 { animation-delay: 0.06s; }
.hero__title .line--2 { animation-delay: 0.16s; color: var(--text); }
.hero__title .line--3 { animation-delay: 0.26s; color: var(--text-mid); }

@keyframes line-in {
  to { opacity: 1; transform: translateY(0); }
}

.hero__desc {
  max-width: 46ch;
  color: var(--text-mid);
  font-size: clamp(0.92rem, 1.4vw, 1.05rem);
  line-height: 1.85;
  margin: 0 0 2.4rem;
  opacity: 0;
  animation: fade-up 0.9s var(--ease) 0.42s forwards;
}

.hero__desc strong { color: var(--green); font-weight: 500; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 2.4rem;
  opacity: 0;
  animation: fade-up 0.9s var(--ease) 0.56s forwards;
}

.meta-cell {
  background: var(--bg-panel);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
}

.meta-cell__label {
  font-size: 9.5px;
  letter-spacing: 0.19em;
  color: var(--text-faint);
}

.meta-cell__value {
  font-size: 12.5px;
  color: var(--text);
  font-weight: 400;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  animation: fade-up 0.9s var(--ease) 0.68s forwards;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.82rem 1.6rem;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: 1px solid var(--green-dim);
  color: var(--green);
  background: transparent;
  transition: all 0.32s var(--ease);
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.32s var(--ease);
  z-index: 0;
}

.btn > * { position: relative; z-index: 1; }
.btn:hover { color: var(--bg); border-color: var(--green); }
.btn:hover::before { transform: scaleX(1); }

.btn__bracket { color: var(--green-dim); transition: color 0.32s var(--ease); }
.btn:hover .btn__bracket { color: var(--bg); }

.btn--ghost {
  border-color: var(--line-bright);
  color: var(--text-mid);
}
.btn--ghost::before { background: var(--line-bright); }
.btn--ghost:hover { color: var(--text); border-color: var(--line-bright); }
.btn--ghost:hover .btn__bracket { color: var(--text); }

/* ── ASCII 面板 ── */
.hero__panel {
  border: 1px solid var(--line);
  background: var(--bg-panel);
  opacity: 0;
  animation: fade-up 1s var(--ease) 0.5s forwards;
  position: relative;
}

.hero__panel::before,
.hero__panel::after {
  content: '';
  position: absolute;
  width: 9px;
  height: 9px;
  border: 1px solid var(--green-dim);
}
.hero__panel::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.hero__panel::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.panel__title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-inset);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.panel__dots { display: flex; gap: 5px; }
.panel__dots i {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--line-bright);
}
.panel__dots i:first-child { background: var(--red); }
.panel__dots i:nth-child(2) { background: var(--amber); }
.panel__dots i:nth-child(3) { background: var(--green); }

.ascii {
  margin: 0;
  padding: 1.1rem 0.9rem;
  font-size: clamp(5px, 0.92vw, 8.6px);
  line-height: 1.16;
  color: var(--green);
  text-shadow: 0 0 7px rgba(0, 255, 156, 0.55);
  overflow-x: auto;
  white-space: pre;
  letter-spacing: 0.06em;
}

.panel__foot {
  display: flex;
  justify-content: space-between;
  padding: 0.55rem 0.85rem;
  border-top: 1px solid var(--line);
  background: var(--bg-inset);
  font-size: 10.5px;
  letter-spacing: 0.07em;
  color: var(--text-dim);
}

.hero__scroll {
  position: absolute;
  bottom: 1.6rem;
  left: clamp(1rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--text-faint);
}

.scroll-line {
  width: 68px;
  height: 1px;
  background: linear-gradient(90deg, var(--green-dim), transparent);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--green);
  animation: scan-x 2.6s var(--ease) infinite;
}

@keyframes scan-x {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ═══════════ 通用 section ═══════════ */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(4rem, 10vh, 8rem) clamp(1rem, 4vw, 3rem);
}

.section__head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: clamp(2.2rem, 5vw, 3.6rem);
}

.section__num {
  font-family: var(--display);
  font-size: 13px;
  color: var(--green-dim);
  font-weight: 600;
}

.section__title {
  font-family: var(--display);
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin: 0;
  color: var(--text);
}

.section__rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line-bright), transparent);
}

.section__hint {
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.1em;
}

/* ═══════════ 项目卡片网格 ═══════════ */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  position: relative;
  background: var(--bg-panel);
  transition: background 0.4s var(--ease);
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}

.card:hover { background: var(--bg-raised); }
.card:hover::before { transform: scaleX(1); }

.card--feature {
  grid-column: 1 / -1;
  background:
    radial-gradient(ellipse 60% 100% at 0% 0%, var(--green-ghost), transparent 70%),
    var(--bg-panel);
}

.card__idx {
  position: absolute;
  top: 1.1rem;
  right: 1.2rem;
  font-family: var(--display);
  font-size: 34px;
  font-weight: 700;
  color: var(--bg-raised);
  line-height: 1;
  pointer-events: none;
  transition: color 0.4s var(--ease);
}

.card:hover .card__idx { color: var(--line); }

.card__body { padding: 2rem 1.6rem 1.6rem; position: relative; z-index: 1; }

.card--feature .card__body {
  padding: 2.6rem 2.2rem 2rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  gap: 2rem;
  align-items: start;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}

.chip {
  font-size: 9.5px;
  letter-spacing: 0.14em;
  padding: 0.24rem 0.55rem;
  border: 1px solid var(--line-bright);
  color: var(--text-dim);
  text-transform: uppercase;
}

.chip--live {
  border-color: var(--green-dim);
  color: var(--green);
  background: var(--green-ghost);
}

.chip--live::before {
  content: '● ';
  animation: pulse-dot 2s var(--ease) infinite;
  display: inline-block;
}

.card__title {
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 0 0 0.85rem;
  color: var(--text);
  line-height: 1.25;
}

.card--feature .card__title { font-size: clamp(1.5rem, 2.6vw, 2rem); }

.card__desc {
  color: var(--text-mid);
  font-size: 13.5px;
  line-height: 1.8;
  margin: 0 0 1.3rem;
}

.card__points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.card__points li {
  font-size: 12.5px;
  color: var(--text-mid);
  line-height: 1.65;
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
}

.bullet { color: var(--green-dim); flex-shrink: 0; }

.card__points code {
  font-family: var(--mono);
  font-size: 11.5px;
  padding: 0.1rem 0.35rem;
  background: var(--green-ghost);
  color: var(--green);
  border: 1px solid var(--line);
}

.card__foot {
  margin-top: 1.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
  align-items: center;
}

.card__metric {
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  text-transform: uppercase;
}

.card__metric b {
  color: var(--amber);
  font-weight: 600;
  font-size: 12px;
  margin-right: 0.25rem;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 12px;
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease);
}

.card__link:hover { border-bottom-color: var(--green); }

.arrow {
  display: inline-block;
  transition: transform 0.3s var(--ease);
}

a:hover .arrow, .btn:hover .arrow { transform: translate(3px, -3px); }

/* ═══════════ STACK ═══════════ */
.stack {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stack__col { background: var(--bg-panel); padding: 1.6rem 1.3rem 1.3rem; }

.stack__title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--text);
  margin: 0 0 1.1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line);
}

.stack__marker {
  color: var(--green);
  font-size: 10px;
}

.stack__list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; }

.stack__list li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.62rem 0;
  border-bottom: 1px dashed var(--line);
  transition: padding-left 0.3s var(--ease);
}

.stack__list li:last-child { border-bottom: 0; }
.stack__list li:hover { padding-left: 0.4rem; }

.stack__name {
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
}

.stack__note {
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

/* ═══════════ LAB 终端 ═══════════ */
.lab {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 1.4rem;
}

.lab__terminal {
  border: 1px solid var(--line);
  background: var(--bg-inset);
  display: flex;
  flex-direction: column;
  min-height: 380px;
}

.lab__screen {
  flex: 1;
  padding: 1.2rem 1.1rem;
  font-size: 12.5px;
  line-height: 1.85;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.lab__screen .ln { display: block; }
.lab__screen .ln-prompt { color: var(--green); }
.lab__screen .ln-out   { color: var(--text-mid); }
.lab__screen .ln-key  { color: var(--amber); }
.lab__screen .ln-hl   { color: var(--green); }
.lab__screen .ln-dim  { color: var(--text-faint); }

.lab__input {
  display: flex;
  gap: 0.5rem;
  padding: 0.8rem 1.1rem;
  border-top: 1px solid var(--line);
  background: var(--bg-panel);
  font-size: 12.5px;
  min-height: 42px;
}

.lab__side { display: flex; flex-direction: column; gap: 1.4rem; }

.lab__block {
  border: 1px solid var(--line);
  background: var(--bg-panel);
  padding: 1.3rem 1.2rem;
}

.lab__block-title {
  font-size: 11px;
  letter-spacing: 0.13em;
  color: var(--text-faint);
  margin: 0 0 1rem;
  font-weight: 400;
  text-transform: uppercase;
}

.readout { list-style: none; padding: 0; margin: 0; }

.readout li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--line);
  font-size: 11.5px;
}

.readout li:last-child { border-bottom: 0; }

.readout span { color: var(--text-faint); letter-spacing: 0.12em; }
.readout b {
  color: var(--green);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  font-size: 13px;
}

.focus-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.75rem; }

.focus-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 12.5px;
  color: var(--text-mid);
  line-height: 1.6;
}

.focus-list__dot {
  width: 5px;
  height: 5px;
  background: var(--amber);
  margin-top: 0.55em;
  flex-shrink: 0;
  transform: rotate(45deg);
}

/* ═══════════ CONTACT ═══════════ */
.section--contact { padding-bottom: clamp(3rem, 7vh, 5rem); }

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.contact__lead {
  color: var(--text-mid);
  font-size: 14px;
  line-height: 1.9;
  margin: 0 0 1.6rem;
}

.contact__email {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--display);
  font-size: clamp(1.5rem, 4.4vw, 2.9rem);
  font-weight: 600;
  color: var(--green);
  text-decoration: none;
  letter-spacing: -0.01em;
  position: relative;
  padding-bottom: 0.15rem;
}

.contact__email::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--green-dim);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

.contact__email:hover::after { transform: scaleX(1); }

.contact__links { display: flex; flex-direction: column; border-top: 1px solid var(--line); }

.link-row {
  display: grid;
  grid-template-columns: 90px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.05rem 0.4rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: background 0.3s var(--ease), padding-left 0.3s var(--ease);
}

.link-row:hover { background: var(--green-ghost); padding-left: 0.9rem; }

.link-row__key {
  font-size: 10px;
  letter-spacing: 0.17em;
  color: var(--text-faint);
}

.link-row__val {
  font-size: 13px;
  color: var(--text);
}

.link-row:hover .link-row__key { color: var(--green-dim); }
.link-row .arrow { color: var(--green-dim); }

/* ═══════════ FOOTER ═══════════ */
.footer {
  border-top: 1px solid var(--line);
  padding: 1.4rem clamp(1rem, 4vw, 3rem);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 10.5px;
  letter-spacing: 0.13em;
  color: var(--text-faint);
  text-transform: uppercase;
  max-width: var(--maxw);
  margin: 0 auto;
}

.footer__mark { color: var(--green-dim); font-family: var(--display); font-weight: 600; }
.footer__sep { color: var(--text-faint); opacity: 0.5; }

/* ═══════════ 滚动进场 ═══════════ */
.will-reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity .7s cubic-bezier(.16, 1, .3, 1),
    transform .7s cubic-bezier(.16, 1, .3, 1);
}

.will-reveal.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════ 响应式 ═══════════ */
@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; }
  .hero__panel { order: -1; }
  .card--feature .card__body { grid-template-columns: 1fr; }
  .lab { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 14px; }
  .topbar__host, .topbar__locale, .topbar__sep { display: none; }

  .mobile-nav {
    display: block;
    position: sticky;
    top: 45px;
    z-index: 99;
    background: rgba(5, 8, 10, 0.94);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }

  .mobile-nav__toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 100%;
    padding: 0.75rem 1.2rem;
    background: none;
    border: 0;
    cursor: pointer;
  }

  .mobile-nav__toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--green);
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
  }

  .mobile-nav.open .mobile-nav__toggle span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
  .mobile-nav.open .mobile-nav__toggle span:nth-child(2) { opacity: 0; }
  .mobile-nav.open .mobile-nav__toggle span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

  .mobile-nav__menu {
    display: none;
    flex-direction: column;
    border-top: 1px solid var(--line);
  }

  .mobile-nav.open .mobile-nav__menu { display: flex; }

  .mobile-nav__menu a {
    padding: 0.9rem 1.2rem;
    font-size: 12.5px;
    letter-spacing: 0.12em;
    color: var(--text-mid);
    text-decoration: none;
    border-bottom: 1px solid var(--line);
  }

  .mobile-nav__menu a:active { background: var(--green-ghost); color: var(--green); }

  .hero__title { font-size: clamp(2.1rem, 11vw, 3.2rem); }
  .hero__meta { grid-template-columns: 1fr 1fr; }
  .ascii { font-size: 5.2px; }
  .grid { grid-template-columns: 1fr; }
  .card__body { padding: 1.6rem 1.2rem 1.3rem; }
  .card--feature .card__body { padding: 1.9rem 1.2rem 1.5rem; }
  .card__idx { font-size: 26px; }
  .contact__email { font-size: clamp(1.3rem, 7vw, 1.9rem); }
  .link-row { grid-template-columns: 72px 1fr auto; gap: 0.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .grain { display: none; }
}