/* ==========================================================================
   components.css — 导航 / Hero / 关于 / 项目 / 能力 / 联系 / 页尾
   构成原则：非对称栅格 + 发丝线 + 等宽刻度，留白充足，不做居中三卡。
   ========================================================================== */

/* ==========================================================================
   1. 导航
   ========================================================================== */
.nav {
  position: fixed; inset: 0 0 auto 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  display: flex; align-items: center;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              backdrop-filter var(--dur-base) var(--ease-out);
}

.nav.is-stuck {
  background: rgba(12, 12, 15, .72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--c-line);
}

.nav__inner {
  width: 100%; max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-5);
}

.brand {
  display: inline-flex; align-items: baseline; gap: 6px;
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.brand__dot { color: var(--c-accent); }

.brand__sub {
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  color: var(--c-faint);
}

.nav__links {
  display: flex; align-items: center; gap: var(--s-6);
}

.nav__link {
  position: relative;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-muted);
  padding: 6px 0;
  transition: color var(--dur-fast) var(--ease-out);
}

.nav__link i {
  font-style: normal;
  color: var(--c-faint);
  margin-right: 6px;
}

.nav__link::after {
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--c-accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}

.nav__link:hover, .nav__link:focus-visible { color: var(--c-text); }
.nav__link:hover::after { transform: scaleX(1); }

.nav__actions { display: flex; align-items: center; gap: var(--s-3); }

.nav__cta { min-height: 44px; padding: 0 var(--s-4); }

/* 汉堡：仅小屏出现 */
.burger {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  border: 1px solid var(--c-line-2);
  border-radius: var(--r-pill);
  cursor: pointer;
}

.burger span {
  display: block; width: 16px; height: 1px;
  background: var(--c-text);
  position: relative;
  transition: background var(--dur-fast) var(--ease-out);
}

.burger span::before, .burger span::after {
  content: ""; position: absolute; left: 0;
  width: 16px; height: 1px; background: var(--c-text);
  transition: transform var(--dur-base) var(--ease-out);
}

.burger span::before { transform: translateY(-5px); }
.burger span::after  { transform: translateY(5px); }

.burger[aria-expanded="true"] span { background: transparent; }
.burger[aria-expanded="true"] span::before { transform: rotate(45deg); }
.burger[aria-expanded="true"] span::after  { transform: rotate(-45deg); }

/* 移动端全屏菜单 */
.sheet {
  position: fixed; inset: 0; z-index: 39;
  background: rgba(8, 8, 10, .96);
  backdrop-filter: blur(18px);
  display: flex; flex-direction: column; justify-content: center;
  padding: var(--s-8) var(--gutter);
  opacity: 0; visibility: hidden;
  transform: translateY(-12px);
  transition: opacity var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out),
              visibility var(--dur-base);
}

.sheet.is-open { opacity: 1; visibility: visible; transform: none; }

.sheet__link {
  display: flex; align-items: baseline; gap: var(--s-4);
  padding: var(--s-4) 0;
  border-bottom: 1px solid var(--c-line);
  font-family: var(--f-display);
  font-size: clamp(1.75rem, 8vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -.02em;
}

.sheet__link i {
  font-family: var(--f-mono);
  font-style: normal;
  font-size: var(--fs-label);
  color: var(--c-accent);
}

.sheet__meta {
  margin-top: var(--s-7);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-muted);
  line-height: 2;
}

/* ==========================================================================
   2. Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100dvh;
  padding-top: calc(var(--nav-h) + var(--s-9));
  padding-bottom: var(--s-8);
  display: flex; align-items: center;
  overflow: hidden;
}

/* 记忆点：溢出画布的巨型描边字，作为背景层参与构成 */
.hero__ghost {
  position: absolute;
  right: -.06em; bottom: -.12em;
  z-index: 0;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(7rem, 22vw, 20rem);
  line-height: .8;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(242, 239, 233, .09);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

.hero__inner {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px;
  gap: var(--s-7);
  align-items: end;
}

.hero__title {
  font-size: var(--fs-display);
  line-height: .98;
  letter-spacing: -.035em;
  margin-top: var(--s-5);
}

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

/* 标题第二行整体右移，打破左对齐的呆板 */
.hero__title .indent { display: block; padding-left: clamp(0px, 8vw, 140px); }

.hero__lead {
  max-width: 46ch;
  margin-top: var(--s-6);
  font-size: var(--fs-lead);
  color: var(--c-muted);
}

.hero__lead strong { color: var(--c-text); font-weight: 500; }

.hero__actions {
  display: flex; flex-wrap: wrap; gap: var(--s-4);
  margin-top: var(--s-7);
}

/* 右侧竖向刻度条 */
.hero__rail {
  display: flex; flex-direction: column; align-items: flex-end;
  gap: var(--s-5);
  padding-bottom: var(--s-2);
  text-align: right;
}

.rail__stack {
  writing-mode: vertical-rl;
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-faint);
}

.status {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.status__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 0 var(--c-accent-line);
  animation: pulse 2.6s var(--ease-io) infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(0, 225, 255, .5); }
  70%  { box-shadow: 0 0 0 10px rgba(0, 225, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 225, 255, 0); }
}

/* 关键词跑马灯 */
.marquee {
  position: relative;
  margin-top: var(--s-9);
  padding-block: var(--s-3);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.marquee__track {
  display: flex; gap: var(--s-7);
  width: max-content;
  animation: slide 34s linear infinite;
}

.marquee:hover .marquee__track { animation-play-state: paused; }

.marquee__item {
  display: inline-flex; align-items: center; gap: var(--s-7);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-muted);
  white-space: nowrap;
}

.marquee__item::after {
  content: "";
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--c-accent);
}

@keyframes slide {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ==========================================================================
   3. 关于 / 经历
   ========================================================================== */
.about { padding-block: var(--section-y); }

/* 头像里有真实照片时的图片样式 */
.portrait img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 50% 22%;
  filter: contrast(.96) saturate(.94) brightness(.96);
}

.about__grid {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: clamp(32px, 5vw, 88px);
  align-items: start;
}

/* 头像框：CSS 生成的人像剪影 + 四角括号装饰（后续可替换为 <img>） */
.portrait {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--r-md);
  overflow: hidden;
  background:
    radial-gradient(70% 55% at 50% 12%, rgba(0, 225, 255, .30), transparent 62%),
    radial-gradient(80% 70% at 30% 90%, var(--c-glow-cool), transparent 60%),
    linear-gradient(160deg, #1A1A20, #0E0E12 70%);
  border: 1px solid var(--c-line);
  box-shadow: var(--sh-2);
}

.portrait::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right,  rgba(242,239,233,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242,239,233,.05) 1px, transparent 1px);
  background-size: 34px 34px;
}

/* 抽象人形：头 + 肩，用两个圆角形状压在网格上 */
.portrait__figure {
  position: absolute; left: 50%; bottom: 0;
  transform: translateX(-50%);
  width: 74%; height: 78%;
}

.portrait__head {
  position: absolute; left: 50%; top: 8%;
  width: 34%; aspect-ratio: 1;
  transform: translateX(-50%);
  border-radius: 50% 50% 46% 46%;
  background: linear-gradient(180deg, #2A2A31, #16161B);
  box-shadow: inset 0 1px 0 rgba(242,239,233,.10);
}

.portrait__body {
  position: absolute; left: 50%; bottom: 0;
  width: 100%; height: 56%;
  transform: translateX(-50%);
  border-radius: 46% 46% 0 0 / 34% 34% 0 0;
  background: linear-gradient(180deg, #232329, #101015);
  box-shadow: inset 0 1px 0 rgba(242,239,233,.08);
}

.portrait__glow {
  position: absolute; left: 50%; top: -10%;
  width: 70%; aspect-ratio: 1;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(0, 225, 255,.42), transparent 66%);
  filter: blur(26px);
}

/* 四角括号 */
.portrait__corner {
  position: absolute; width: 18px; height: 18px;
  border: 1px solid var(--c-accent-line);
}

.portrait__corner:nth-child(1) { top: 12px; left: 12px;  border-right: 0; border-bottom: 0; }
.portrait__corner:nth-child(2) { top: 12px; right: 12px; border-left: 0;  border-bottom: 0; }
.portrait__corner:nth-child(3) { bottom: 12px; left: 12px;  border-right: 0; border-top: 0; }
.portrait__corner:nth-child(4) { bottom: 12px; right: 12px; border-left: 0;  border-top: 0; }

.portrait__tag {
  position: absolute; left: 14px; bottom: 14px;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  background: rgba(8, 8, 10, .68);
  backdrop-filter: blur(8px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-text);
}

.about__body h2 {
  font-size: var(--fs-h2);
  margin-top: var(--s-4);
  max-width: 22ch;
}

.about__text {
  margin-top: var(--s-5);
  max-width: 56ch;
  color: var(--c-muted);
  font-size: var(--fs-lead);
}

.about__text + .about__text { margin-top: var(--s-4); }

.about__text strong { color: var(--c-text); font-weight: 500; }

/* 联系方式 */
.contact-list {
  margin-top: var(--s-7);
  border-top: 1px solid var(--c-line);
}

.contact-list__row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  gap: var(--s-4);
  align-items: center;
  padding: var(--s-4) 0;
  border-bottom: 1px solid var(--c-line);
}

.contact-list__key {
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-faint);
}

.contact-list__val {
  font-size: var(--fs-sm);
  color: var(--c-text);
  overflow-wrap: anywhere;
}

.contact-list__go {
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: .1em;
  color: var(--c-faint);
  transition: color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.contact-list__row:hover .contact-list__go,
.contact-list__row:focus-within .contact-list__go {
  color: var(--c-accent);
  transform: translateX(3px);
}

/* 项目数据 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--s-4);
  margin-top: var(--s-7);
  padding-top: var(--s-6);
  border-top: 1px solid var(--c-line-2);
}

.stat__num {
  display: flex; align-items: baseline; gap: 2px;
  font-family: var(--f-mono);
  font-size: clamp(1.75rem, 3.4vw, 2.75rem);
  font-weight: 500;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}

.stat__num span { font-size: .5em; color: var(--c-accent); }

.stat__label {
  margin-top: var(--s-2);
  font-size: var(--fs-xs);
  color: var(--c-muted);
  line-height: 1.5;
}

/* ==========================================================================
   3.5 职业经历（紧凑时间线）
   ========================================================================== */
.career { padding-block: var(--section-y); }

.career__list {
  margin-top: var(--s-8);
  border-top: 1px solid var(--c-line-2);
}

.career__row {
  display: grid;
  grid-template-columns: 160px 240px minmax(0, 1fr);
  gap: var(--s-5);
  align-items: start;
  padding: var(--s-5) 0;
  border-bottom: 1px solid var(--c-line);
  transition: background var(--dur-base) var(--ease-out);
}

.career__row:hover { background: rgba(242, 239, 233, .02); }

.career__when {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
  color: var(--c-muted);
  padding-top: 4px;
  font-variant-numeric: tabular-nums;
}

.career__role { font-size: var(--fs-sm); font-weight: 500; }
.career__org  { margin-top: 4px; font-size: var(--fs-xs); color: var(--c-faint); }

.career__note {
  font-size: var(--fs-sm);
  color: var(--c-muted);
  line-height: 1.65;
  max-width: 62ch;
}

.career__row:hover .career__when { color: var(--c-accent); }

/* ==========================================================================
   4. 精选项目
   ========================================================================== */
.work { padding-block: var(--section-y); }

.section-head {
  display: flex; flex-wrap: wrap;
  align-items: flex-end; justify-content: space-between;
  gap: var(--s-5);
  padding-bottom: var(--s-6);
  border-bottom: 1px solid var(--c-line-2);
}

.section-head h2 {
  font-size: var(--fs-h2);
  margin-top: var(--s-4);
}

.section-head__note {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-faint);
  text-align: right;
}

.work__list { margin-top: var(--s-8); display: grid; gap: clamp(48px, 7vw, 112px); }

/* 交错：偶数项封面换到左侧，形成对角流动 */
.work-item {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 48px);
  align-items: center;
}

.work-item__media { grid-column: 1 / span 7; }

.work-item__info  { grid-column: 9 / span 4; }

.work-item:nth-child(even) .work-item__media { grid-column: 6 / span 7; order: 2; }
.work-item:nth-child(even) .work-item__info  { grid-column: 1 / span 4; order: 1; }
.work-item:nth-child(even) .work-item__info  { text-align: right; }
.work-item:nth-child(even) .work-item__tags  { justify-content: flex-end; }

/* 封面：4 种不同构成，避免"一模一样的卡片" */
.shot {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: var(--c-surface);
  box-shadow: var(--sh-1);
  transition: transform var(--dur-slow) var(--ease-out),
              box-shadow var(--dur-slow) var(--ease-out),
              border-color var(--dur-slow) var(--ease-out);
}

.shot__inner {
  position: absolute; inset: 0;
  transition: transform var(--dur-slow) var(--ease-out);
}

/* 01 AI 工作台：暖光晕 + 网格 + 扫描线 */
.shot--a .shot__inner {
  background:
    repeating-linear-gradient(to bottom, rgba(255,255,255,.035) 0 1px, transparent 1px 4px),
    radial-gradient(60% 60% at 26% 28%, rgba(0, 225, 255,.55), transparent 64%),
    radial-gradient(70% 70% at 82% 78%, var(--c-glow-cool), transparent 62%),
    linear-gradient(150deg, #17171D, #0C0C10);
}

/* 02 设计系统：模块阵列 */
.shot--b .shot__inner {
  background:
    linear-gradient(to right,  rgba(242,239,233,.07) 1px, transparent 1px) 0 0 / 12.5% 100%,
    linear-gradient(to bottom, rgba(242,239,233,.07) 1px, transparent 1px) 0 0 / 100% 25%,
    linear-gradient(135deg, #1B1B22, #0D0D11);
}

.shot--b::after {
  content: "";
  position: absolute;
  left: 12.5%; top: 25%;
  width: 25%; height: 50%;
  background: var(--c-accent-soft);
  border: 1px solid var(--c-accent-line);
  border-radius: var(--r-sm);
}

/* 03 移动端 UX：竖向条纹 + 圆角卡 */
.shot--c .shot__inner {
  background:
    repeating-linear-gradient(90deg, rgba(242,239,233,.05) 0 2px, transparent 2px 22px),
    linear-gradient(200deg, #191920, #0B0B0F 72%);
}

.shot--c::after {
  content: "";
  position: absolute; right: 14%; top: 12%;
  width: 26%; height: 76%;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(242,239,233,.14), rgba(242,239,233,.03));
  border: 1px solid var(--c-line-2);
  box-shadow: var(--sh-2);
}

/* 04 品牌：conic 扇形 + 中心字标 */
.shot--d .shot__inner {
  background:
    conic-gradient(from 210deg at 62% 46%,
      rgba(0, 225, 255,.55), transparent 22%,
      var(--c-glow-cool) 48%, transparent 70%,
      rgba(0, 225, 255,.32) 92%, transparent),
    linear-gradient(#131318, #0B0B0F);
}

.shot--d::after {
  content: "M";
  position: absolute; left: 62%; top: 46%;
  transform: translate(-50%, -50%);
  font-family: var(--f-display);
  font-size: clamp(3rem, 9vw, 6rem);
  font-weight: 800;
  letter-spacing: -.04em;
  color: rgba(242,239,233,.9);
}

.shot__badge {
  position: absolute; left: 16px; top: 16px;
  z-index: 2;
  padding: 5px 11px;
  background: rgba(8, 8, 10, .62);
  backdrop-filter: blur(8px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  color: var(--c-text);
}

.work-item__index {
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  color: var(--c-accent);
}

.work-item__title {
  margin-top: var(--s-3);
  font-size: var(--fs-h3);
  display: inline-flex; align-items: center; gap: var(--s-3);
}

.work-item__title .arrow {
  font-family: var(--f-mono);
  font-size: .7em;
  color: var(--c-faint);
  transition: transform var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out);
}

.work-item__desc {
  margin-top: var(--s-4);
  color: var(--c-muted);
  font-size: var(--fs-sm);
  max-width: 42ch;
}

.work-item__tags {
  display: flex; flex-wrap: wrap; gap: var(--s-2);
  margin-top: var(--s-5);
}

.tag {
  padding: 5px 11px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-muted);
  transition: border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}

.work-item:hover .tag { border-color: var(--c-line-2); color: var(--c-text); }

.work-item:hover .shot {
  transform: translateY(-6px);
  border-color: var(--c-accent-line);
  box-shadow: var(--sh-3), var(--sh-accent);
}

.work-item:hover .shot__inner { transform: scale(1.04); }
.work-item:hover .work-item__title .arrow { transform: translate(4px, -4px); color: var(--c-accent); }

/* ==========================================================================
   5. 能力 / 优势
   ========================================================================== */
.cap { padding-block: var(--section-y); }

.cap__grid {
  margin-top: var(--s-8);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

.panel {
  position: relative;
  padding: clamp(24px, 3vw, 40px);
  background: linear-gradient(180deg, rgba(28,28,34,.72), rgba(18,18,22,.72));
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-1);
  overflow: hidden;
}

/* 面板顶部一条发丝高光 */
.panel::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-line-2) 30%, transparent);
}

.panel__head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: var(--s-4);
  padding-bottom: var(--s-5);
  margin-bottom: var(--s-5);
  border-bottom: 1px solid var(--c-line);
}

.panel__title { font-size: var(--fs-h3); font-weight: 700; }

.panel__hint {
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-faint);
}

/* A. 擅长什么 —— 技能条 */
.skill + .skill { margin-top: var(--s-5); }

.skill__top {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: var(--s-3);
  margin-bottom: var(--s-2);
}

.skill__name { font-size: var(--fs-sm); font-weight: 500; }

.skill__val {
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  color: var(--c-muted);
  font-variant-numeric: tabular-nums;
}

.skill__bar {
  height: 3px;
  background: rgba(242, 239, 233, .08);
  border-radius: var(--r-pill);
  overflow: hidden;
}

.skill__fill {
  display: block;
  height: 100%;
  width: var(--w, 50%);
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent-hi));
  border-radius: inherit;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--dur-scene) var(--ease-out);
}

.is-in .skill__fill, .skill.is-in .skill__fill { transform: scaleX(1); }

/* B. 如何工作 —— 编号流程 */
.step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: var(--s-4);
  padding: var(--s-4) 0;
  border-bottom: 1px solid var(--c-line);
  transition: padding-left var(--dur-base) var(--ease-out);
}

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

.step:hover { padding-left: var(--s-3); }

.step:hover .step__num { color: var(--c-accent); }

.step__num {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  color: var(--c-faint);
  padding-top: 3px;
  transition: color var(--dur-fast) var(--ease-out);
}

.step__name { font-size: var(--fs-sm); font-weight: 500; }

.step__desc { margin-top: 4px; font-size: var(--fs-sm); color: var(--c-muted); }

/* C. 解决什么 —— 问题 → 结果，横跨整行 */
.panel--wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 48px);
}

.fix__q {
  font-size: var(--fs-sm);
  color: var(--c-muted);
  display: flex; gap: var(--s-3);
}

.fix__q::before {
  content: "问题";
  flex: none;
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: .1em;
  color: var(--c-faint);
  padding-top: 3px;
}

.fix__a {
  margin-top: var(--s-4);
  padding-top: var(--s-4);
  border-top: 1px solid var(--c-line);
  font-family: var(--f-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.24;
}

.fix:hover .fix__a { color: var(--c-accent-hi); }

.fix__a { transition: color var(--dur-base) var(--ease-out); }

/* ==========================================================================
   6. 页尾联系区
   ========================================================================== */
.contact {
  position: relative;
  margin-top: var(--section-y);
  padding-top: var(--section-y);
  padding-bottom: var(--s-8);
  background:
    radial-gradient(60% 80% at 20% 0%, rgba(0, 225, 255, .16), transparent 62%),
    linear-gradient(180deg, transparent, var(--c-void) 55%);
  border-top: 1px solid var(--c-line);
  overflow: hidden;
}

.contact__title {
  font-size: var(--fs-display);
  line-height: .98;
  letter-spacing: -.035em;
}

.contact__title em { font-style: normal; color: var(--c-accent); }

.contact__mail {
  display: inline-block;
  margin-top: var(--s-7);
  font-family: var(--f-display);
  font-size: clamp(1.35rem, 4.6vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.1;
  padding-bottom: 6px;
  background-image: linear-gradient(var(--c-accent), var(--c-accent));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 2px;
  transition: background-size var(--dur-slow) var(--ease-out),
              color var(--dur-base) var(--ease-out);
}

.contact__mail:hover, .contact__mail:focus-visible {
  background-size: 100% 2px;
  color: var(--c-accent-hi);
}

.contact__grid {
  margin-top: var(--s-9);
  padding-top: var(--s-6);
  border-top: 1px solid var(--c-line);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--s-5);
}

/* 微信二维码：在联系区里作为一块视觉元素 */
.qr-cell__link {
  display: inline-block;
  margin-top: var(--s-3);
  padding: 6px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  transition: transform var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}

.qr-cell__link:hover { transform: translateY(-2px); border-color: var(--c-accent); }

.qr-cell__img {
  display: block;
  width: 96px; height: 96px;
  object-fit: contain;
  /* 微信码一般是黑白色，但深色背景下用白底更清晰 */
}

.contact__k {
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-faint);
}

.contact__v { margin-top: var(--s-3); font-size: var(--fs-sm); }

.contact__v a:hover { color: var(--c-accent); }

.footer {
  margin-top: var(--s-9);
  padding-top: var(--s-5);
  border-top: 1px solid var(--c-line);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--s-4);
  font-family: var(--f-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-faint);
}

.to-top {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 0 var(--s-4);
  border: 1px solid var(--c-line-2);
  border-radius: var(--r-pill);
  color: var(--c-muted);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}

.to-top:hover { color: var(--c-text); border-color: var(--c-accent); }

/* ==========================================================================
   7. 自定义光标（仅精确指针设备）
   ========================================================================== */
.cursor {
  position: fixed; top: 0; left: 0;
  z-index: var(--z-cursor);
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--c-accent);
  pointer-events: none;
  mix-blend-mode: screen;
  transform: translate3d(-50%, -50%, 0);
  transition: width var(--dur-fast) var(--ease-out),
              height var(--dur-fast) var(--ease-out),
              opacity var(--dur-fast) var(--ease-out);
  opacity: 0;
}

.cursor.is-active { opacity: 1; }

.cursor.is-hot {
  width: 38px; height: 38px;
  background: rgba(0, 225, 255, .28);
  border: 1px solid var(--c-accent);
}

@media (hover: none), (pointer: coarse) {
  .cursor { display: none; }
}

/* ==========================================================================
   8. 响应式：1024 / 768 / 420 三档
   ========================================================================== */

/* --- 平板 --- */
@media (max-width: 1080px) {
  .hero__inner { grid-template-columns: minmax(0, 1fr) 120px; }
  .about__grid { grid-template-columns: 260px minmax(0, 1fr); }
  .work-item__media { grid-column: 1 / span 12; }
  .work-item__info  { grid-column: 1 / span 12; }
  .work-item:nth-child(even) .work-item__media { grid-column: 1 / span 12; order: 0; }
  .work-item:nth-child(even) .work-item__info  { grid-column: 1 / span 12; order: 0; text-align: left; }
  .work-item:nth-child(even) .work-item__tags  { justify-content: flex-start; }
  .cap__grid { grid-template-columns: minmax(0, 1fr); }
  .panel--wide { grid-template-columns: minmax(0, 1fr); }

  .career__row { grid-template-columns: 140px minmax(0, 1fr); }
  .career__note { grid-column: 1 / -1; }
}

/* --- 移动端 --- */
@media (max-width: 767px) {
  .nav__links { display: none; }
  .nav__cta { display: none; }
  .burger { display: inline-flex; }

  .hero { min-height: auto; padding-top: calc(var(--nav-h) + var(--s-8)); padding-bottom: var(--s-8); }
  .hero__inner { grid-template-columns: minmax(0, 1fr); gap: var(--s-6); }
  .hero__rail {
    flex-direction: row; align-items: center; justify-content: space-between;
    width: 100%; text-align: left;
  }
  .rail__stack { writing-mode: horizontal-tb; }
  .hero__title .indent { padding-left: 0; }
  .marquee { margin-top: var(--s-7); }

  .about__grid { grid-template-columns: minmax(0, 1fr); }
  .portrait { max-width: 320px; }

  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-5) var(--s-4); }

  .section-head { align-items: flex-start; }
  .section-head__note { text-align: left; }

  .shot { aspect-ratio: 3 / 2; }

  .contact__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-5); }

  .career__row { grid-template-columns: minmax(0, 1fr); gap: var(--s-2); }
  .career__when { padding-top: 0; }

  .footer { justify-content: flex-start; }
}

/* --- 小屏 --- */
@media (max-width: 420px) {
  .contact__grid { grid-template-columns: minmax(0, 1fr); }
  .hero__actions .btn { width: 100%; }
  .stats { grid-template-columns: minmax(0, 1fr); }
  .contact-list__row { grid-template-columns: 76px minmax(0, 1fr); }
  .contact-list__go { display: none; }
}