/* ==========================================================================
   个人作品集 — 编辑式极简（参考 FORM Los Angeles）
   设计语言：暖纸底色 / 近乎单色 / 全大写宽字距 / 发丝分割线 / 大留白
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 颜色：暖中性纸感，克制单色 */
  --bg: #faf9f6;
  --bg-alt: #f3f1ec;
  --surface: #f2f0eb;
  --ink: #1a1a18;
  --ink-2: #45443f;
  --muted: #83827a;
  --faint: #a9a79e;
  --line: #e4e2db;
  --line-strong: #d1cec5;
  --accent: #1a1a18;
  --bg-glass: rgba(250, 249, 246, 0.82); /* 页头毛玻璃底色 */

  /* 排版 */
  --font: "Helvetica Neue", Helvetica, -apple-system, BlinkMacSystemFont,
    "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial,
    sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas,
    monospace;

  /* 尺度 */
  --wrap: 1240px;
  --wrap-mid: 940px;
  --wrap-narrow: 720px;

  /* 间距 */
  --s-1: 8px;
  --s-2: 14px;
  --s-3: 22px;
  --s-4: 34px;
  --s-5: 52px;
  --s-6: 84px;
  --s-7: 128px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

h1,
h2,
h3,
h4,
p {
  margin: 0;
  font-weight: inherit;
}

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

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

/* ---------- 3. 排版基元 ---------- */
.u-caps {
  text-transform: uppercase;
  letter-spacing: 0.09em;
}

.label {
  font-size: 10.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.display {
  font-size: clamp(2rem, 5.4vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: 0.005em;
  font-weight: 400;
  text-transform: uppercase;
}

.h2 {
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  line-height: 1.25;
  letter-spacing: 0.06em;
  font-weight: 400;
  text-transform: uppercase;
}

.h3 {
  font-size: 0.95rem;
  letter-spacing: 0.07em;
  font-weight: 500;
  text-transform: uppercase;
  line-height: 1.4;
}

.lead {
  font-size: clamp(1rem, 1.5vw, 1.14rem);
  line-height: 1.72;
  color: var(--ink-2);
}

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

.max-52 {
  max-width: 52ch;
}

.max-44 {
  max-width: 44ch;
}

/* ---------- 4. 布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 40px;
}

.wrap-mid {
  max-width: var(--wrap-mid);
}

.wrap-narrow {
  max-width: var(--wrap-narrow);
}

section {
  padding: var(--s-6) 0;
}

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* ---------- 5. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

.brand-mark {
  width: 22px;
  height: 22px;
  border: 1px solid var(--ink);
  display: grid;
  place-items: center;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-links > li > a {
  position: relative;
  font-size: 11.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  padding: 6px 0;
  transition: color 0.25s var(--ease);
}

.nav-links > li > a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.nav-links > li > a:hover {
  color: var(--ink);
}

.nav-links > li > a:hover::after,
.nav-links > li > a.is-active::after {
  transform: scaleX(1);
}

.nav-links > li > a.is-active {
  color: var(--ink);
}

.nav-toggle {
  display: none;
  width: 34px;
  height: 34px;
  place-items: center;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--ink);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1px;
  background: var(--ink);
  transition: transform 0.28s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.nav-toggle.is-open span {
  background: transparent;
}

.nav-toggle.is-open span::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open span::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 6. 按钮（克制、方角） ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 30px;
  font-size: 11.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  transition: background 0.3s var(--ease), color 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

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

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

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

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

/* 文字链接：下划线滑动 */
.link-line {
  position: relative;
  display: inline-block;
  font-size: 11.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  padding-bottom: 3px;
}

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

.link-line:hover::after {
  transform: scaleX(0);
  transform-origin: left;
}

/* ---------- 7. 首屏 ---------- */
.hero {
  padding: clamp(72px, 12vw, 148px) 0 var(--s-6);
}

.hero .display {
  margin: var(--s-3) 0 var(--s-4);
  max-width: 20ch;
}

.hero-foot {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
  align-items: start;
  margin-top: var(--s-5);
  padding-top: var(--s-4);
  border-top: 1px solid var(--line);
}

.hero-foot .lead {
  max-width: 40ch;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: var(--s-5);
  justify-content: end;
}

.meta-block .k {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--faint);
  margin-bottom: 5px;
}

.meta-block .v {
  font-size: 13.5px;
  color: var(--ink);
}

/* ---------- 8. 首页作品预览（编辑式编号列表） ---------- */
.index-list {
  border-top: 1px solid var(--line);
}

.index-item {
  display: grid;
  grid-template-columns: 52px 96px 1fr auto;
  gap: var(--s-4);
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  transition: padding 0.35s var(--ease), background 0.35s var(--ease);
}

.index-item:hover {
  padding-left: 14px;
  padding-right: 14px;
  background: var(--bg-alt);
}

.index-item .idx {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--faint);
}

.index-item .name {
  font-size: clamp(1.2rem, 2.6vw, 1.9rem);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.15;
}

.index-item .name small {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-top: 6px;
}

.index-item .tags {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: right;
}

.index-thumb {
  position: relative;
  width: 96px;
  height: 66px;
  flex-shrink: 0;
  overflow: hidden;
}

/* ---------- 9. 章节头 ---------- */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--s-4);
  margin-bottom: var(--s-5);
  flex-wrap: wrap;
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--line);
}

.section-head .h2 {
  margin-top: var(--s-2);
}

/* ---------- 10. 作品网格（双栏，图片为主） ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s-5) var(--s-4);
}

.work-card {
  display: block;
}

.work-thumb {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--surface);
  display: grid;
  place-items: center;
}

.work-thumb .ph-tag {
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  mix-blend-mode: overlay;
}

.work-thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle at 1px 1px,
    rgba(255, 255, 255, 0.18) 1px,
    transparent 0
  );
  background-size: 20px 20px;
  opacity: 0.45;
}

.work-thumb .zoom {
  position: absolute;
  inset: auto 0 0 0;
  padding: 14px 16px;
  background: linear-gradient(to top, rgba(20, 20, 18, 0.55), transparent);
  color: #fff;
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  transform: translateY(102%);
  transition: transform 0.4s var(--ease);
}

.work-card:hover .work-thumb .zoom {
  transform: none;
}

/* 图片填充层（真实 <img> 或渐变占位都放这里），悬停轻微缩放 */
.fill {
  position: absolute;
  inset: 0;
  z-index: 0;
  transition: transform 0.7s var(--ease);
}

/* 真实图片：铺满容器并居中裁切，不变形 */
img.fill {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 图上的文字标签需浮在占位层之上 */
.img-ph > span:not(.fill),
.detail-cover > span:not(.fill),
.portrait > span:not(.fill) {
  position: relative;
  z-index: 1;
}

.work-card:hover .work-thumb .fill {
  transform: scale(1.045);
}

/* 渐变占位 —— 替换为真实图片时删除 .g-* 类即可 */
.fill.g-1 { background: linear-gradient(150deg, #2f2d2a, #55514b 60%, #7c766d); }
.fill.g-2 { background: linear-gradient(150deg, #3b3f42, #5f666a 60%, #8b9296); }
.fill.g-3 { background: linear-gradient(150deg, #6b4a35, #9c7048 60%, #c9a06d); }
.fill.g-4 { background: linear-gradient(150deg, #2d4440, #46665f 60%, #7d9a90); }
.fill.g-5 { background: linear-gradient(150deg, #5a3138, #83474f 60%, #b07a80); }
.fill.g-6 { background: linear-gradient(150deg, #2a3350, #3f4c73 60%, #7180a8); }

.work-meta {
  padding-top: 18px;
  display: grid;
  gap: 5px;
}

.work-meta .cat {
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faint);
}

.work-meta .name {
  font-size: clamp(1rem, 2vw, 1.32rem);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.work-meta .sub {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.work-meta .spec {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.work-card.is-wide {
  grid-column: 1 / -1;
}

.work-card.is-wide .work-thumb {
  aspect-ratio: 21 / 9;
}

/* ---------- 11. 筛选 ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  margin-bottom: var(--s-5);
  border-bottom: 1px solid var(--line);
  padding-bottom: var(--s-3);
}

.filter-btn {
  position: relative;
  padding: 0 0 4px;
  font-size: 11.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  transition: color 0.25s var(--ease);
}

.filter-btn::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.filter-btn:hover {
  color: var(--ink);
}

.filter-btn.is-active {
  color: var(--ink);
}

.filter-btn.is-active::after {
  transform: scaleX(1);
}

/* ---------- 12. 能力/服务（编辑式分栏） ---------- */
.cap-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.cap {
  padding: var(--s-5) var(--s-4) var(--s-5) 0;
  border-right: 1px solid var(--line);
}

.cap:last-child {
  border-right: 0;
}

.cap .n {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--faint);
  display: block;
  margin-bottom: 22px;
}

.cap .h3 {
  margin-bottom: 12px;
}

.cap p {
  font-size: 14px;
  line-height: 1.68;
  color: var(--muted);
  max-width: 32ch;
}

/* ---------- 13. CTA ---------- */
.cta {
  padding: var(--s-7) 0 var(--s-6);
  text-align: center;
}

.cta .display {
  font-size: clamp(1.6rem, 4.4vw, 3rem);
  max-width: 22ch;
  margin: 0 auto var(--s-4);
}

.cta .btn-row {
  justify-content: center;
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: var(--s-6) 0 var(--s-4);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr 1fr;
  gap: var(--s-4);
}

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 13.5px;
  color: var(--muted);
  max-width: 30ch;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 18px;
}

.footer-col li {
  margin-bottom: 11px;
}

.footer-col a {
  font-size: 13.5px;
  color: var(--ink-2);
  transition: color 0.2s var(--ease);
}

.footer-col a:hover {
  color: var(--ink);
}

.footer-bottom {
  margin-top: var(--s-6);
  padding-top: var(--s-3);
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ---------- 15. 内页标题 ---------- */
.page-head {
  padding: clamp(56px, 8vw, 96px) 0 var(--s-5);
  border-bottom: 1px solid var(--line);
}

.page-head .display {
  font-size: clamp(1.8rem, 4.6vw, 3rem);
  margin-top: var(--s-3);
}

.page-head .lead {
  margin-top: var(--s-3);
  max-width: 52ch;
}

.page-head-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--s-4);
  flex-wrap: wrap;
}

/* ---------- 16. 作品详情 ---------- */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s-4);
  transition: color 0.2s var(--ease), gap 0.25s var(--ease);
}

.back-link:hover {
  color: var(--ink);
  gap: 12px;
}

.detail-title {
  font-size: clamp(1.6rem, 4.4vw, 3rem);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.08;
}

.detail-sub {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 12px;
}

.detail-cover {
  aspect-ratio: 16 / 9;
  margin: var(--s-5) 0 0;
  overflow: hidden;
  display: grid;
  place-items: center;
  position: relative;
}

.detail-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-4);
  padding: var(--s-4) 0;
  border-bottom: 1px solid var(--line);
}

.detail-meta .k {
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 8px;
}

.detail-meta .v {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.55;
}

.prose {
  padding: var(--s-6) 0;
}

.prose > * + * {
  margin-top: var(--s-4);
}

.prose h2 {
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  line-height: 1.3;
  margin-top: var(--s-6);
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

.prose p {
  font-size: 1.04rem;
  line-height: 1.8;
  color: var(--ink-2);
}

.prose li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  color: var(--ink-2);
  font-size: 1rem;
  line-height: 1.75;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background: var(--muted);
}

.img-ph {
  position: relative;
  aspect-ratio: 16 / 10;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.85);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3);
}

.grid-2 .img-ph {
  aspect-ratio: 4 / 3;
}

.prose figcaption {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin-top: 12px;
}

.pull-quote {
  border-left: 1px solid var(--ink);
  padding: 6px 0 6px 28px;
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  line-height: 1.45;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.next-work {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: var(--s-5) 0;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}

.next-work .h3 {
  margin-top: 8px;
  font-size: clamp(1.2rem, 2.6vw, 1.7rem);
}

/* ---------- 17. 关于页 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--s-6);
  align-items: start;
}

.portrait {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  display: grid;
  place-items: center;
  position: sticky;
  top: 96px;
}

.about-body > * + * {
  margin-top: var(--s-4);
}

.about-body .lead {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  line-height: 1.55;
  color: var(--ink);
}

.skill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: var(--s-3);
}

.chip {
  padding: 7px 16px;
  border: 1px solid var(--line-strong);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.timeline {
  border-top: 1px solid var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: var(--s-4);
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-item .when {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 3px;
}

.timeline-item .what h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.timeline-item .what .where {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 4px 0 8px;
}

.timeline-item .what p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
}

/* ---------- 18. 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-6);
  align-items: start;
}

.field {
  display: block;
  margin-bottom: var(--s-4);
}

.field .k {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 10px;
}

.field input,
.field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  padding: 10px 0;
  outline: none;
  transition: border-color 0.25s var(--ease);
}

.field textarea {
  resize: vertical;
  min-height: 100px;
}

.field input:focus,
.field textarea:focus {
  border-bottom-color: var(--ink);
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--faint);
}

.contact-list li {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.contact-list .k {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ---------- 19. 滚动渐显 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  will-change: opacity, transform;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
  .work-thumb .fill,
  .work-card:hover .work-thumb .fill {
    transition: none;
    transform: none;
  }
}

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--s-4);
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 860px) {
  .wrap {
    padding: 0 28px;
  }
  .hero-foot {
    grid-template-columns: 1fr;
    gap: var(--s-4);
  }
  .hero-meta {
    justify-content: start;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--s-5);
  }
  .portrait {
    position: static;
    aspect-ratio: 16 / 10;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--s-6);
  }
  .cap-list {
    grid-template-columns: 1fr;
  }
  .cap {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: var(--s-4) 0;
  }
}

@media (max-width: 720px) {
  .wrap {
    padding: 0 22px;
  }
  .nav-links {
    position: fixed;
    inset: 66px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 10px 22px 26px;
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease);
  }
  .nav-links.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links > li {
    width: 100%;
  }
  .nav-links > li > a {
    display: block;
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
    font-size: 13px;
  }
  .nav-links > li > a::after {
    display: none;
  }
  .nav-toggle {
    display: grid;
  }
  .work-grid {
    grid-template-columns: 1fr;
    gap: var(--s-5);
  }
  .work-thumb {
    aspect-ratio: 4 / 5;
  }
  .index-item {
    grid-template-columns: 34px 1fr;
    gap: var(--s-3);
  }
  .index-item .tags {
    display: none;
  }
  .index-item .index-thumb {
    display: none;
  }
  .detail-meta {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-4);
  }
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .hero-meta {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-4);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .detail-meta {
    grid-template-columns: 1fr;
  }
  .hero-meta {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .index-item .name small {
    margin-top: 4px;
  }
}