/* ============================================================
   LAIMAO® — 全站开发工程师 · 品牌站
   设计语言：日系海报 × 开发者终端
   朱红 / 墨黑 / 奶油纸 · Anton + Noto Sans SC + JetBrains Mono
   ============================================================ */

:root {
  --ink: #17120e;
  --ink-2: #2a211a;
  --paper: #f4eee2;
  --paper-2: #ece4d4;
  --verm: #e8523b;
  --verm-deep: #c43a26;
  --sky: #bcd7f5;
  --line: rgba(23, 18, 14, 0.16);
  --line-strong: rgba(23, 18, 14, 0.7);
  --cream-line: rgba(244, 238, 226, 0.22);

  --disp: "Anton", "Noto Sans SC", sans-serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --ease: cubic-bezier(0.22, 0.65, 0.3, 1);
  --pad-x: clamp(1.25rem, 4vw, 4rem);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden; /* 旧浏览器回退 */
  overflow-x: clip;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden; /* 旧浏览器回退 */
  overflow-x: clip;
}

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

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

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--verm);
  color: var(--paper);
}

::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--paper);
}
::-webkit-scrollbar-thumb {
  background: var(--ink);
  border: 2px solid var(--paper);
}

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

.mono {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

/* ---------- 跳转链接（键盘用户） ---------- */
.skip-link {
  position: fixed;
  top: 0.8rem;
  left: 0.8rem;
  z-index: 300;
  background: var(--verm);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  padding: 0.7em 1.2em;
  transform: translateY(-200%);
  transition: transform 0.3s var(--ease);
}

.skip-link:focus-visible {
  transform: none;
}

/* ---------- 阅读进度条 ---------- */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--verm);
  transform: scaleX(0);
  transform-origin: left;
  z-index: 150;
  pointer-events: none;
  will-change: transform;
}

/* ---------- 胶片颗粒 ---------- */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 9990;
  pointer-events: none;
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-shift 0.9s steps(4) infinite;
}

@keyframes grain-shift {
  0% { transform: translate(0, 0); }
  25% { transform: translate(-2%, 1.4%); }
  50% { transform: translate(1.6%, -1%); }
  75% { transform: translate(-1%, -1.8%); }
  100% { transform: translate(0, 0); }
}

/* ---------- 自定义光标 ---------- */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  pointer-events: none;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  will-change: transform;
  display: none; /* 无 JS 时彻底隐藏 */
}

.cursor-dot {
  width: 8px;
  height: 8px;
  background: var(--verm);
}

.cursor-ring {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(23, 18, 14, 0.55);
  transition: width 0.3s var(--ease), height 0.3s var(--ease),
    border-color 0.3s, background-color 0.3s;
}

.cursor-ring.is-active {
  width: 58px;
  height: 58px;
  border-color: var(--verm);
  background: rgba(232, 82, 59, 0.08);
}

/* 深色区域上光标环反色 */
.on-dark .cursor-ring {
  border-color: rgba(244, 238, 226, 0.7);
}

/* 仅在 JS 可用 + 精确指针环境下显示 */
html.js .cursor-dot,
html.js .cursor-ring {
  display: block;
}

@media (hover: none), (pointer: coarse) {
  html.js .cursor-dot,
  html.js .cursor-ring {
    display: none;
  }
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.1rem var(--pad-x);
  border-bottom: 1px solid transparent;
  transition: background-color 0.4s, border-color 0.4s, padding 0.4s;
}

.nav.is-scrolled {
  background: rgba(244, 238, 226, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
}

.nav__brand {
  font-family: var(--disp);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--paper);
  transition: color 0.4s;
}

.nav.is-scrolled .nav__brand {
  color: var(--ink);
}

.nav__brand sup {
  font-size: 0.55em;
  color: var(--verm);
}

.nav__mark {
  width: 16px;
  height: 16px;
  border: 3px solid var(--verm);
  border-radius: 50%;
  flex: none;
}

.nav__links {
  display: flex;
  gap: clamp(1.25rem, 2.5vw, 2.5rem);
}

.nav__link {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: rgba(244, 238, 226, 0.72);
  position: relative;
  padding-block: 0.25rem;
  transition: color 0.3s;
}

.nav.is-scrolled .nav__link {
  color: rgba(23, 18, 14, 0.66);
}

.nav__link em {
  font-style: normal;
  color: var(--verm);
  margin-right: 0.35em;
  font-size: 0.85em;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--verm);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease);
}

.nav__link:hover {
  color: var(--verm) !important;
}

.nav__link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* 当前区域高亮（Scrollspy） */
.nav__link.is-active {
  color: var(--verm) !important;
}

.nav__link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav__cta {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--paper);
  border: 1px solid rgba(244, 238, 226, 0.5);
  padding: 0.55em 1.3em;
  transition: 0.3s;
}

.nav.is-scrolled .nav__cta {
  color: var(--ink);
  border-color: rgba(23, 18, 14, 0.45);
}

.nav__cta:hover {
  background: var(--verm);
  border-color: var(--verm);
  color: var(--paper) !important;
}

.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 42px;
  height: 42px;
  background: none;
  border: 1px solid rgba(244, 238, 226, 0.4);
  cursor: pointer;
  align-items: center;
  z-index: 102;
}

.nav__burger span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--paper);
  transition: transform 0.35s var(--ease), background 0.3s;
}

.nav.is-scrolled .nav__burger span {
  background: var(--ink);
}

.nav--open .nav__burger span {
  background: var(--paper);
}

.nav--open .nav__burger span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav--open .nav__burger span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh; /* 旧浏览器回退 */
  min-height: 100svh;
  background: var(--ink);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

/* 无 WebGL / 着色器失败时的氛围底色（正常时被不透明 canvas 覆盖） */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 75% at 74% 28%, rgba(196, 58, 38, 0.32), transparent 62%),
    radial-gradient(46% 60% at 16% 78%, rgba(232, 82, 59, 0.16), transparent 66%),
    radial-gradient(42% 50% at 55% 55%, rgba(188, 215, 245, 0.05), transparent 70%);
}

#shaderCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.hero__meta {
  position: absolute;
  z-index: 3;
  color: rgba(244, 238, 226, 0.55);
  line-height: 1.9;
  font-size: 0.68rem;
}

.hero__meta--tl {
  top: 5.5rem;
  left: var(--pad-x);
}

.hero__meta--tr {
  top: 5.5rem;
  right: var(--pad-x);
  text-align: right;
}

.hero__title-wrap {
  position: relative;
  z-index: 3;
  padding: 0 var(--pad-x) clamp(4rem, 9vh, 7rem);
  max-width: 1500px;
}

.hero__kicker {
  color: var(--sky);
  margin-bottom: 1.4rem;
  font-size: 0.78rem;
}

.hero__kicker::after {
  content: "▌";
  color: var(--verm);
  animation: blink 1.1s steps(1) infinite;
  margin-left: 0.2em;
}

@keyframes blink {
  50% { opacity: 0; }
}

@keyframes menu-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero__title {
  font-family: var(--disp);
  font-weight: 400;
  text-transform: uppercase;
  font-size: clamp(3rem, 12.5vw, 11.5rem);
  line-height: 0.94;
  letter-spacing: 0.01em;
}

.hero__line {
  display: block;
  overflow: hidden;
}

.hero__solid,
.hero__stroke {
  display: block; /* 使 transform 生效（遮罩入场） */
}

.hero__solid {
  color: var(--paper);
}

.hero__stroke {
  color: transparent;
  -webkit-text-stroke: 2px var(--paper);
}

.hero__sub {
  margin-top: 1.8rem;
  color: rgba(244, 238, 226, 0.85);
  font-size: clamp(1rem, 1.4vw, 1.2rem);
}

.hero__sub strong {
  color: var(--verm);
  font-weight: 700;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  margin-top: 2.2rem;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  padding: 1em 1.9em;
  border: 1px solid var(--paper);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s,
    transform 0.2s ease-out;
}

.btn--solid {
  background: var(--verm);
  border-color: var(--verm);
  color: var(--paper);
}

.btn--solid:hover {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
}

.btn--ghost {
  color: var(--paper);
  background: transparent;
}

.btn--ghost:hover {
  background: var(--paper);
  color: var(--ink);
}

.btn__arrow {
  transition: transform 0.3s var(--ease);
}

.btn:hover .btn__arrow {
  transform: translateX(5px);
}

.hero__vertical {
  position: absolute;
  z-index: 3;
  right: calc(var(--pad-x) * 0.55);
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  letter-spacing: 0.6em;
  color: rgba(244, 238, 226, 0.45);
  font-size: 0.7rem;
}

.hero__scroll {
  position: absolute;
  z-index: 3;
  left: var(--pad-x);
  bottom: 1.4rem;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  color: rgba(244, 238, 226, 0.5);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
}

.hero__scroll-line {
  width: 1px;
  height: 44px;
  background: rgba(244, 238, 226, 0.4);
  position: relative;
  overflow: hidden;
}

.hero__scroll-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--verm);
  animation: scroll-drip 1.8s var(--ease) infinite;
}

@keyframes scroll-drip {
  0% { transform: translateY(-100%); }
  60%, 100% { transform: translateY(100%); }
}

/* ============================================================
   跑马灯
   ============================================================ */
.marquee {
  background: var(--ink);
  color: var(--paper);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  overflow: hidden;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
  position: relative;
  z-index: 4;
}

.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee 26s linear infinite;
  will-change: transform;
}

.marquee__item {
  font-family: var(--disp);
  font-size: clamp(1.1rem, 2.2vw, 1.6rem);
  letter-spacing: 0.05em;
  white-space: nowrap;
  padding-right: 2rem;
  text-transform: uppercase;
}

.marquee__item i {
  font-style: normal;
  color: var(--verm);
  margin-inline: 1rem;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ============================================================
   SECTION 通用
   ============================================================ */
.section {
  padding: clamp(5.5rem, 10vw, 9rem) var(--pad-x);
  border-top: 1px solid var(--line);
}

/* 锚点跳转留出固定导航高度 */
section[id] {
  scroll-margin-top: 76px;
}

.section__head {
  max-width: 1400px;
  margin: 0 auto clamp(3rem, 6vw, 5rem);
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  padding-bottom: 1.4rem;
  position: relative;
}

/* 标题下划线：随滚动显现从左向右绘出 */
.section__head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1s var(--ease) 0.25s;
}

.section__head.in-view::after,
html:not(.js) .section__head::after {
  transform: scaleX(1);
}

.section__no {
  color: var(--verm);
  font-weight: 700;
}

.section__label {
  color: rgba(23, 18, 14, 0.5);
  letter-spacing: 0.35em;
  text-transform: uppercase;
}

.section__title {
  margin-left: auto;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(2.2rem, 5.5vw, 4.2rem);
  line-height: 1.1;
  letter-spacing: 0.04em;
}

.section__title em {
  font-style: normal;
  color: var(--verm);
}

/* ============================================================
   01 ABOUT
   ============================================================ */
.about__grid {
  max-width: 1400px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(280px, 430px) 1fr;
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
}

.about__portrait {
  position: relative;
  padding: 6%;
  overflow: hidden; /* 裁剪旋转圆环超出容器的空角，避免移动端横向溢出 */
}

.about__portrait img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: auto; /* 跟随固有宽高比，避免 height 属性提示把高度钉死导致变形 */
  mix-blend-mode: multiply; /* 白底融入纸面，露出背后的圆环 */
  filter: contrast(1.04) saturate(1.05);
}

.about__circle {
  position: absolute;
  z-index: 1;
  inset: 10% 8%;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
}

.about__ring {
  position: absolute;
  z-index: 3;
  inset: -4%;
  width: 108%;
  height: 108%;
  animation: spin 26s linear infinite;
}

.about__ring-text {
  font-family: var(--mono);
  font-size: 8.6px;
  letter-spacing: 0.32em;
  fill: rgba(23, 18, 14, 0.75);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.about__lede {
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 700;
  line-height: 1.7;
  margin-bottom: 1.8rem;
}

.about__lede em {
  font-style: normal;
  color: var(--verm);
}

.about__body p:not(.about__lede) {
  color: rgba(23, 18, 14, 0.78);
  max-width: 58ch;
  margin-bottom: 1.2rem;
}

.about__body strong {
  color: var(--verm-deep);
}

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.8rem;
}

.about__tags li {
  border: 1px solid var(--line-strong);
  padding: 0.4em 1em;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  transition: 0.3s;
  cursor: default;
}

.about__tags li:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.stats {
  max-width: 1400px;
  margin: clamp(4rem, 7vw, 6rem) auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
}

.stats__item {
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stats__item:first-child {
  border-left: none;
}

.stats__num {
  font-family: var(--disp);
  font-size: clamp(2.6rem, 5vw, 4.2rem);
  line-height: 1;
  font-variant-numeric: tabular-nums; /* 数字滚动时不抖动 */
}

.stats__num b {
  font-weight: 400;
  color: var(--verm);
}

.stats__label {
  color: rgba(23, 18, 14, 0.55);
  font-size: 0.64rem;
}

/* ============================================================
   02 STACK
   ============================================================ */
.stack__grid {
  max-width: 1400px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
}

.stack__card {
  padding: clamp(1.6rem, 2.5vw, 2.2rem);
  border-left: 1px solid var(--line);
  min-height: 340px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: background-color 0.45s var(--ease), color 0.45s var(--ease);
}

.stack__card:first-child {
  border-left: none;
}

.stack__card::before {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -70px;
  width: 150px;
  height: 150px;
  border: 1.5px solid var(--verm);
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.6) rotate(-12deg);
  transition: 0.5s var(--ease);
}

.stack__card:hover {
  background: var(--ink);
  color: var(--paper);
}

.stack__card:hover::before {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

.stack__no {
  font-size: 0.66rem;
  color: var(--verm);
  margin-bottom: 1.4rem;
}

.stack__name {
  font-size: clamp(1.6rem, 2.2vw, 2rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1.15;
  margin-bottom: 0.8rem;
}

.stack__name small {
  display: block;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--verm);
  margin-top: 0.5rem;
}

.stack__desc {
  font-size: 0.88rem;
  line-height: 1.85;
  opacity: 0.72;
  flex: 1;
}

.stack__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.6rem;
}

.stack__tags li {
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  border: 1px solid currentColor;
  opacity: 0.55;
  padding: 0.3em 0.7em;
  transition: opacity 0.3s;
}

.stack__card:hover .stack__tags li {
  opacity: 0.9;
}

/* ============================================================
   03 WORKS
   ============================================================ */
.works__list {
  max-width: 1400px;
  margin-inline: auto;
  border-bottom: 1px solid var(--line);
}

.work {
  display: grid;
  grid-template-columns: 70px minmax(260px, 420px) 1fr 40px;
  gap: clamp(1.5rem, 3.5vw, 3.5rem);
  align-items: center;
  padding: clamp(1.8rem, 3vw, 2.8rem) 0;
  border-top: 1px solid var(--line);
  position: relative;
}

.work__no {
  color: rgba(23, 18, 14, 0.45);
  font-size: 0.72rem;
}

.work__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink);
}

.work__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.01);
  transition: transform 0.7s var(--ease), filter 0.7s;
  filter: saturate(0.92);
}

.work:hover .work__media img {
  transform: scale(1.07);
  filter: saturate(1.1);
}

.work__title {
  font-size: clamp(1.4rem, 2.6vw, 2.1rem);
  font-weight: 900;
  letter-spacing: 0.03em;
  margin-bottom: 0.5rem;
  transition: color 0.3s;
}

.work__desc {
  color: rgba(23, 18, 14, 0.65);
  font-size: 0.92rem;
  max-width: 52ch;
}

.work__tags {
  display: flex;
  gap: 1.2rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.work__tags li {
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: rgba(23, 18, 14, 0.45);
}

.work__arrow {
  font-size: 1.8rem;
  justify-self: end;
  transition: transform 0.35s var(--ease), color 0.35s;
  color: rgba(23, 18, 14, 0.4);
}

.work:hover .work__title {
  color: var(--verm);
}

.work:hover .work__arrow {
  transform: translate(6px, -6px);
  color: var(--verm);
}

/* 桌面端：悬停整行右移缩进 */
@media (hover: hover) and (pointer: fine) {
  .work {
    transition: padding-left 0.5s var(--ease);
  }
  html.js .work.reveal {
    transition: opacity 0.9s var(--ease), transform 0.9s var(--ease),
      padding-left 0.5s var(--ease);
    transition-delay: var(--d, 0s), var(--d, 0s), 0s;
  }
  .work:hover {
    padding-left: clamp(0.4rem, 1.2vw, 1.2rem);
  }
}

/* ============================================================
   04 PROCESS
   ============================================================ */
.process__steps {
  max-width: 1400px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  counter-reset: step;
}

.process__step {
  border-top: 2px solid var(--ink);
  padding-top: 1.6rem;
  position: relative;
}

.process__no {
  font-family: var(--disp);
  font-size: clamp(2.8rem, 4.5vw, 4rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
  display: block;
  margin-bottom: 1.2rem;
  transition: color 0.35s;
}

.process__step:hover .process__no {
  color: var(--verm);
  -webkit-text-stroke-color: var(--verm);
}

.process__step h3 {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
}

.process__step h3 small {
  display: block;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--verm);
  margin-top: 0.4rem;
}

.process__step p {
  font-size: 0.88rem;
  color: rgba(23, 18, 14, 0.68);
  line-height: 1.85;
  margin-top: 0.8rem;
}

/* ============================================================
   05 CONTACT
   ============================================================ */
.contact {
  background: var(--ink);
  color: var(--paper);
  border-top: none;
}

.contact .section__head::after {
  background: var(--paper);
}

.contact .section__label {
  color: rgba(244, 238, 226, 0.5);
}

.contact__hero {
  max-width: 1400px;
  margin-inline: auto;
}

.contact__cn {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.contact__cn::before {
  content: "✦ ";
  color: var(--verm);
}

.contact__en {
  font-family: var(--disp);
  font-size: clamp(3.4rem, 11vw, 10rem);
  line-height: 0.95;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.contact__en span {
  color: transparent;
  -webkit-text-stroke: 2px var(--verm);
}

.contact__mail-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.3rem;
  margin-top: 2.8rem;
}

.contact__mail {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--mono);
  font-size: clamp(1rem, 2vw, 1.4rem);
  letter-spacing: 0.08em;
  padding-bottom: 0.4em;
  border-bottom: 2px solid var(--paper);
  transition: color 0.3s, border-color 0.3s;
}

.contact__mail:hover {
  color: var(--verm);
  border-color: var(--verm);
}

.contact__copy {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  color: rgba(244, 238, 226, 0.75);
  background: transparent;
  border: 1px solid rgba(244, 238, 226, 0.35);
  padding: 0.65em 1.4em;
  cursor: pointer;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

.contact__copy:hover {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
}

.contact__copy.is-copied {
  background: var(--verm);
  border-color: var(--verm);
  color: var(--paper);
}

.contact__socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 3rem;
}

.contact__socials a {
  border: 1px solid rgba(244, 238, 226, 0.35);
  padding: 0.6em 1.4em;
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  color: rgba(244, 238, 226, 0.75);
  transition: 0.3s;
}

.contact__socials a:hover {
  background: var(--verm);
  border-color: var(--verm);
  color: var(--paper);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--ink);
  color: rgba(244, 238, 226, 0.5);
  border-top: 1px solid rgba(244, 238, 226, 0.14);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.4rem var(--pad-x);
  font-size: 0.62rem;
}

.footer__mid {
  text-align: center;
}

.footer__top {
  transition: color 0.3s;
}

.footer__top:hover {
  color: var(--verm);
}

/* ============================================================
   REVEAL 动效
   ============================================================ */
/* 仅在 JS 可用时分阶段显现（无 JS 时内容直接可见） */
html.js .reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  transition-delay: var(--d, 0s);
}

html.js .reveal.in-view {
  opacity: 1;
  transform: none;
}

/* Hero 大标题：行本身不位移，由内部遮罩负责入场
   （初始位移挂在未被观察的内部 span 上，避免元素被移出视口导致 IO 死锁） */
html.js .hero__title .reveal {
  opacity: 1;
  transform: none;
  transition: none;
}

html.js .reveal--mask {
  display: block;
  transform: translateY(112%);
  transition: transform 1.15s var(--ease);
}

html.js .reveal.in-view .reveal--mask {
  transform: none;
}

html.js .hero__title .reveal:nth-child(2) .reveal--mask {
  transition-delay: 0.14s;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .stack__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stack__card:nth-child(odd) {
    border-left: none;
  }
  .stack__card:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }
  .process__steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .work {
    grid-template-columns: minmax(220px, 380px) 1fr;
  }
  .work__no {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 2;
    color: var(--paper);
    background: var(--verm);
    padding: 0.35em 0.6em;
  }
  .work__arrow {
    position: absolute;
    right: 0;
    bottom: 2rem;
  }
}

@media (max-width: 860px) {
  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__burger {
    display: flex;
  }

  /* 移动端全屏菜单 */
  .nav--open {
    background: var(--ink);
    border-bottom-color: transparent;
  }

  .nav--open .nav__brand {
    color: var(--paper);
  }

  .nav--open .nav__links {
    display: flex;
    position: fixed;
    inset: 0;
    background: var(--ink);
    flex-direction: column;
    justify-content: center;
    padding: 0 var(--pad-x);
    gap: 2rem;
    z-index: 101;
  }

  .nav--open .nav__link {
    color: var(--paper);
    font-size: 1.6rem;
    font-family: var(--sans);
    font-weight: 900;
    letter-spacing: 0.1em;
  }

  .nav--open .nav__link em {
    font-size: 0.5em;
    vertical-align: middle;
  }

  /* 移动端菜单：逐项错峰入场 */
  .nav--open .nav__link {
    animation: menu-in 0.55s var(--ease) both;
  }
  .nav--open .nav__link:nth-child(1) { animation-delay: 0.05s; }
  .nav--open .nav__link:nth-child(2) { animation-delay: 0.11s; }
  .nav--open .nav__link:nth-child(3) { animation-delay: 0.17s; }
  .nav--open .nav__link:nth-child(4) { animation-delay: 0.23s; }
  .nav--open .nav__link:nth-child(5) { animation-delay: 0.29s; }

  /* 无 JS 环境：直接平铺导航，隐藏汉堡与 CTA */
  html:not(.js) .nav__links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
  }
  html:not(.js) .nav__link {
    font-size: 0.66rem;
  }
  html:not(.js) .nav__burger,
  html:not(.js) .nav__cta {
    display: none;
  }

  .hero__meta--tr {
    display: none;
  }

  .hero__vertical {
    display: none;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }

  .about__portrait {
    max-width: 400px;
    margin-inline: auto;
  }

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

  .stats__item:nth-child(odd) {
    border-left: none;
  }

  .stats__item:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .work {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }

  .work__arrow {
    display: none; /* 单列布局下避免与标签重叠 */
  }

  .process__steps {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer {
    flex-direction: column;
    gap: 0.6rem;
    text-align: center;
  }
}

@media (max-width: 560px) {
  .section__head {
    flex-wrap: wrap;
    row-gap: 0.5rem;
  }
  .section__title {
    margin-left: 0;
    flex-basis: 100%;
  }
  .stack__grid {
    grid-template-columns: 1fr;
  }
  .stack__card {
    border-left: none !important;
    border-top: 1px solid var(--line);
    min-height: 0;
  }
  .stack__card:first-child {
    border-top: none;
  }
  .hero__meta--tl {
    top: 4.8rem;
  }
}

/* ============================================================
   横屏矮屏（手机横置）：压缩首屏
   ============================================================ */
@media (max-height: 600px) and (orientation: landscape) {
  .hero__title {
    font-size: clamp(2.8rem, 9vw, 7rem);
  }
  .hero__title-wrap {
    padding-bottom: 3rem;
  }
  .hero__sub {
    margin-top: 1rem;
  }
  .hero__actions {
    margin-top: 1.3rem;
  }
  .hero__meta,
  .hero__scroll {
    display: none;
  }
}

/* ============================================================
   Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .grain,
  .marquee__track,
  .about__ring,
  .hero__scroll-line::after,
  .hero__kicker::after {
    animation: none !important;
  }
  .nav--open .nav__link {
    animation: none !important;
  }
  html.js .reveal,
  html.js .reveal--mask {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  * {
    transition-duration: 0.01ms !important;
  }
}