/* ============================================================
   马慧颖 · 个人作品集 —— 主样式
   配色与排版规范见 :root 变量区
   ============================================================ */

:root {
  --ink: #171719;
  --text: #252529;
  --paper: #D9D9D6;
  --paper-light: #ECECE8;
  --white: #F7F7F4;
  --muted: #77777A;
  --purple: #7056B8;
  --purple-deep: #4A397D;
  --blue: #3D5F9E;
  --teal: #4E7C72;
  --orange: #B4774E;

  --maxw: 1200px;
  --navw: 190px;              /* 桌面左侧固定导航宽度 */
  --gap: clamp(20px, 3vw, 40px);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { overflow-x: hidden; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* 图片加载失败时的中性兜底（JS 加 .img-broken） */
.img-broken { background: var(--paper-light); position: relative; }
.img-broken img { visibility: hidden; }
.img-broken::after {
  content: ""; position: absolute; inset: 0;
  background:
    repeating-linear-gradient(45deg, transparent 0 13px, rgba(23,23,25,.05) 13px 14px),
    linear-gradient(135deg, #ECECE8, #DBDBD6);
}
/* 真实图片适配规则：
   默认 object-fit: cover —— 保持原比例、铺满容器、不拉伸；
   某张图需要完整显示不裁切时，在其 <figure> 上加 class="fit-contain"。
   占位装饰（圆环/斜纹/内框/角标）只存在于占位 SVG 文件内部，
   替换为真实图片后自动消失，不会叠加在作品上。 */
figure.fit-contain img { object-fit: contain; background: var(--paper-light); }

/* ---------- 布局骨架 ---------- */
main { margin-left: var(--navw); }
.section { padding: clamp(72px, 9vw, 128px) 0; }
/* 版块底色：整页明暗节奏（浅—深交替，AIGC 为深色主题） */
#hero          { background: #D5D5D2; }
#sec-about     { background: #F1F0EC; }
#sec-overview  { background: #DAD9D5; }
#sec-ecommerce { background: #E4E3DF; }
#sec-aigc      { background: #EFEEE9; }
#sec-category  { background: #D7D8D3; }
#sec-data      { background: #E8E5DF; }
#sec-fund      { background: #DEDDD8; }
#sec-exp       { background: #E9E8E3; padding-top: clamp(48px, 6vw, 84px); }
#sec-contact   { background: #171719; }
::selection { background: var(--purple); color: var(--white); }
.section__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 56px);
}

/* ---------- 桌面左侧固定分类导航 ---------- */
.side-nav {
  position: fixed; inset: 0 auto 0 0;
  width: var(--navw);
  display: flex; flex-direction: column;
  padding: 40px 0 40px 28px;
  background: var(--white);
  border-right: 1px solid rgba(23,23,25,.08);
  z-index: 60;
  overflow-y: auto;
}
.side-nav__logo {
  font-size: 20px; font-weight: 700; letter-spacing: .12em;
  color: var(--ink);
}
.side-nav__list { margin-top: 56px; display: flex; flex-direction: column; gap: 22px; }
.side-nav__list a {
  display: flex; flex-direction: column; gap: 2px;
  color: #6B6B6F;                 /* 未激活：比 muted 略深，保证清晰可读 */
  border-left: 3px solid transparent;
  padding-left: 12px; margin-left: -15px;
  transition: color .25s, border-color .25s;
}
.side-nav__num { font-size: 13px; letter-spacing: .18em; font-weight: 600; }
.side-nav__label { font-size: 14px; }
.side-nav__sub { font-size: 11px; color: #9A9A9E; letter-spacing: .06em; margin-top: 1px; }
.side-nav__list a.is-active .side-nav__sub { color: var(--purple); }
/* 侧导航子项：小节快捷跳转 */
.side-nav__children { list-style: none; margin: 6px 0 4px; padding: 0; overflow-x: hidden; }
.side-nav__children a {
  display: block;
  font-size: 12px; line-height: 1.45;
  color: #9A9A9E; text-decoration: none;
  padding: 2.5px 0 2.5px 26px;
  margin-left: 0; border-left: 0;
  letter-spacing: .03em;
  white-space: nowrap;
  transition: color .2s;
}
.side-nav__children a:hover { color: var(--purple); }
.side-nav__children a.is-current { color: var(--purple-deep); font-weight: 600; }
.block-title, .cat-block, .data-case { scroll-margin-top: 24px; }
@media (max-height: 780px) {
  .side-nav__children { display: none; }
}
.side-nav__list a:hover { color: var(--ink); }
.side-nav__list a.is-active { color: var(--purple-deep); border-left-color: var(--purple); }
.side-nav__list a.is-active .side-nav__num { color: var(--purple); }
.side-nav__list a.is-active .side-nav__label { font-weight: 700; }

/* ---------- 右侧滚动进度线 ---------- */
.scroll-progress {
  position: fixed; top: 0; right: 0; bottom: 0;
  width: 3px; background: rgba(23,23,25,.07);
  z-index: 60;
}
.scroll-progress span {
  display: block; width: 100%; height: 100%;
  background: var(--purple);
  transform-origin: top; transform: scaleY(0);
}

/* ---------- 移动端顶部导航（默认隐藏） ---------- */
.top-bar { display: none; }

/* 四个能力分区的专属辅助色：01 紫 / 02 蓝 / 03 青绿 / 04 暖橙 */
#sec-ecommerce { --accent: var(--purple); --accent-deep: var(--purple-deep); }
/* 01 开场：克制的深紫色窄纵向色带（10px，非整块背景） */
#sec-ecommerce .section__head--num { padding-left: 24px; border-left: 10px solid var(--purple-deep); }
#sec-aigc { --accent: var(--blue); --accent-deep: #2E4A7E; }
#sec-category { --accent: var(--teal); --accent-deep: #3C635A; }
/* 02→03 过渡：4px 青绿细线（唯一分隔元素，禁止粗黑条） */
#sec-category { border-top: 4px solid #4E7C72; }
/* 03 品类识别统一青绿色：字母 A/B/C/D 与小标题竖线（英文总标题仍为主紫色） */
#sec-category .cat-block__num { -webkit-text-stroke-color: var(--teal); }
#sec-category .cat-block__strategy { border-left-color: var(--teal); }
#sec-data { --accent: var(--orange); --accent-deep: #96603A; }

/* ---------- 02 AIGC 版块：与全站一致的浅色底（原深色主题已取消） ---------- */
.aigc__note p + p { margin-top: 14px; }

/* ---------- 通用标题系统 ---------- */
.section__en {
  font-size: 13px; letter-spacing: .28em; font-weight: 600;
  color: var(--purple); text-transform: uppercase;
  margin-bottom: 10px;
}
.section__title {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 700; color: var(--ink); line-height: 1.25;
}
.br-m { display: none; }   /* 移动端标题主动断行标记 */
.section__head { margin-bottom: clamp(36px, 5vw, 64px); }
.section__head--num { display: flex; align-items: flex-end; gap: clamp(16px, 3vw, 36px); }
.section__bignum {
  font-size: clamp(72px, 10vw, 132px);
  font-weight: 800; line-height: .9;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--accent, var(--purple));
  letter-spacing: -.02em;
}
.block-title {
  font-size: 18px; font-weight: 700; color: var(--ink);
  padding-left: 14px; border-left: 3px solid var(--accent, var(--purple));
  margin-bottom: 22px; line-height: 1.4;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 12px 30px;
  font-size: 15px; font-weight: 600; letter-spacing: .06em;
  border: 1.5px solid var(--ink);
  transition: background .25s, color .25s, border-color .25s, transform .25s;
  cursor: pointer;
}
.btn--solid { background: var(--purple-deep); border-color: var(--purple-deep); color: var(--white); }
.btn--solid:hover { background: var(--purple); border-color: var(--purple); }
.btn--ghost { color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--purple); color: var(--purple-deep); }
.btn--light { background: var(--white); color: var(--ink); border-color: var(--white); }
.btn--light:hover { background: var(--purple); color: var(--white); border-color: var(--purple); }
.btn--outline-light { background: transparent; color: var(--white); border-color: rgba(247,247,244,.5); }
.btn--outline-light:hover { border-color: var(--white); }

/* ---------- 01 首屏 ---------- */
.hero {
  min-height: 92vh;              /* 露出下一版块引导浏览 */
  display: flex; flex-direction: column; justify-content: center;
  background: #D5D5D2;
  position: relative;
  padding: clamp(48px, 6vw, 80px) 0 clamp(40px, 5vw, 64px);
}
.hero__inner {
  max-width: var(--maxw); margin: 0 auto; width: 100%;
  padding: 0 clamp(20px, 4vw, 56px);
  display: grid; grid-template-columns: 5fr 7fr;
  gap: var(--gap); align-items: center;
}
.hero__eyebrow {
  font-size: 13px; letter-spacing: .3em; font-weight: 600;
  color: var(--purple-deep); margin-bottom: 18px;
}
.hero__name {
  font-size: clamp(48px, 6.5vw, 88px);
  font-weight: 800; color: var(--ink); line-height: 1.1; letter-spacing: .02em;
  position: relative; padding-bottom: 18px;
}
.hero__name::after {           /* 紫色强调条：姓名锚点 */
  content: ""; position: absolute; left: 2px; bottom: 0;
  width: 72px; height: 7px; background: var(--purple);
}
.hero__role {
  margin-top: 16px; font-size: clamp(18px, 2vw, 24px);
  font-weight: 600; color: var(--purple-deep); line-height: 1.6;
}
.hero__facts { margin-top: 28px; border-top: 1px solid rgba(23,23,25,.2); }
.hero__facts li {
  padding: 10px 0; font-size: 15px; color: var(--text);
  border-bottom: 1px solid rgba(23,23,25,.14);
  display: flex; align-items: center; gap: 10px;
}
.hero__facts li::before {
  content: ""; width: 7px; height: 7px; background: var(--purple); flex: none;
}
.hero__actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero__visual {
  aspect-ratio: 16 / 11; overflow: hidden;
  box-shadow: 26px 26px 0 rgba(74,57,125,.20);
}
.hero__scroll-hint {
  position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%);
  width: 24px; height: 38px; border: 1.5px solid rgba(23,23,25,.4); border-radius: 14px;
  display: flex; justify-content: center; padding-top: 7px;
}
.hero__scroll-hint span {
  width: 3px; height: 8px; background: var(--purple); border-radius: 2px;
  animation: hint 1.8s ease-in-out infinite;
}
@keyframes hint { 0%,100% { transform: translateY(0); opacity: 1; } 50% { transform: translateY(8px); opacity: .3; } }

/* ---------- 02 关于我 ---------- */
.about__grid {
  display: grid; grid-template-columns: 5fr 7fr;
  gap: var(--gap); align-items: start;
}
.about__photo { aspect-ratio: 3 / 4; overflow: hidden; margin-top: clamp(0px, 4vw, 48px); }
.about__body p + p { margin-top: 18px; }
.about__body .section__title { margin-bottom: 26px; }
.about__stats {
  margin-top: clamp(48px, 6vw, 80px);
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1.5px solid var(--ink);
}
.about__stat { padding: 26px 18px 0 0; }
.about__stat + .about__stat { border-left: 1px solid rgba(23,23,25,.15); padding-left: 26px; }
.about__stat dt { font-size: clamp(30px, 4vw, 46px); font-weight: 800; color: var(--ink); line-height: 1.1; }
.about__stat dt b { color: var(--purple); font-weight: 800; }
.about__stat dd { margin-top: 6px; font-size: 14px; color: var(--muted); letter-spacing: .05em; }

/* ---------- 03 能力总览 ---------- */
.overview__grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(18px, 2.5vw, 30px);
}
.ov-item {
  position: relative; display: block;
  padding: clamp(24px, 3vw, 38px);
  background: var(--paper-light);
  border-top: 4px solid var(--tone, var(--purple));
  transition: transform .3s, box-shadow .3s;
}
.ov-item--offset { transform: translateY(clamp(0px, 2.5vw, 36px)); }
.ov-item:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(23,23,25,.10); }
.ov-item--offset:hover { transform: translateY(clamp(0px, 2.5vw, 36px)) translateY(-4px); }
.ov-item--purple { --tone: var(--purple); }
.ov-item--blue { --tone: var(--blue); }
.ov-item--teal { --tone: var(--teal); }
.ov-item--orange { --tone: var(--orange); }
.ov-item__num {
  font-size: clamp(40px, 5vw, 60px); font-weight: 800; line-height: 1;
  color: transparent; -webkit-text-stroke: 1.2px var(--tone);
}
.ov-item h3 { margin-top: 16px; font-size: clamp(19px, 2vw, 24px); color: var(--ink); }
.ov-item p { margin-top: 8px; font-size: 14px; color: var(--muted); }
.ov-item__arrow {
  position: absolute; right: 24px; bottom: 22px;
  font-size: 20px; color: var(--tone); transition: transform .3s;
}
.ov-item:hover .ov-item__arrow { transform: translateX(6px); }

/* ---------- 版块通用：作品区块间距 ---------- */
.work__hero { aspect-ratio: 16 / 9; overflow: hidden; }
.work__brief {
  margin: clamp(36px, 5vw, 60px) 0;
  font-size: clamp(20px, 2.6vw, 30px); font-weight: 600; line-height: 1.7; color: var(--ink);
  max-width: 720px;
  padding-left: 26px; border-left: 6px solid var(--accent, var(--purple));
}
/* 导语下的补充说明（醒目提示：紫条 + 深色正文） */
.work__note {
  margin: calc(-1 * clamp(20px, 2.5vw, 30px)) 0 clamp(36px, 5vw, 60px);
  padding: 10px 0 10px 20px;
  border-left: 3px solid var(--purple);
  font-size: 16px; font-weight: 500; line-height: 1.6; color: var(--ink);
}
.work__note a { color: var(--purple); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.work__keywords, .compare, .work__mains, .work__detail,
.aigc__row, .prompt-pair, .workflow, .pipeline { margin-bottom: clamp(44px, 6vw, 72px); }
/* 错位文字节奏：文字块在大图之间左右交替偏移（移动端复位为通栏） */
.work__keywords { margin-left: clamp(0px, 9vw, 130px); }
.work__mains { margin-right: clamp(0px, 6vw, 90px); }
.work__summary {
  font-size: 15px; color: var(--muted);
  border-top: 1px solid rgba(23,23,25,.15); padding-top: 22px;
  max-width: 560px; margin-left: auto; text-align: right;
}

/* 关键词 */
.kw-list { display: flex; flex-wrap: wrap; gap: 12px; }
.kw-list li {
  padding: 8px 20px; font-size: 14px; letter-spacing: .05em;
  border: 1px solid rgba(23,23,25,.3); color: var(--text);
  transition: border-color .25s, color .25s;
}
.kw-list li:hover { border-color: var(--accent, var(--purple)); color: var(--accent-deep, var(--purple-deep)); }

/* 对比组件 */
.compare__row {
  display: grid; grid-template-columns: 1fr auto 1fr;
  gap: clamp(14px, 2vw, 26px); align-items: center;
}
.compare__cell { overflow: hidden; }
.compare__cell img { aspect-ratio: 1 / 1; transition: transform .4s ease; }
.compare__row--wide .compare__cell img { aspect-ratio: 4 / 3; }
/* 三图对比（产品图 → 模特全景 → 模特细节） */
.compare__row--trio { grid-template-columns: 1fr auto 1fr auto 1fr; }
.compare__cell:hover img { transform: scale(1.03); }
.compare__cell figcaption {
  margin-top: 10px; font-size: 13px; letter-spacing: .08em; color: var(--muted);
}
.compare__arrow { font-size: 22px; color: var(--accent, var(--purple)); font-weight: 700; }

/* 主图组（图片编号用紫色小字，增强紫色占比） */
.mains-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: clamp(12px, 1.6vw, 20px);
  counter-reset: mainimg;
}
.mains-grid figure { overflow: visible; position: relative; margin-top: 28px; }  /* 顶部给序号留位，避免角标遮挡主图文案 */
.mains-frame { display: block; overflow: hidden; }
.mains-grid figure::after {
  counter-increment: mainimg;
  content: "0" counter(mainimg);
  position: absolute; left: 0; top: -28px;
  font-size: 12px; font-weight: 700; letter-spacing: .12em;
  color: var(--white); background: var(--purple);
  padding: 2px 8px;
}
.mains-grid img { aspect-ratio: 1 / 1; transition: transform .4s ease; }
.mains-grid figure:hover img { transform: scale(1.03); }

/* 详情页长图（预留宽高比，防止懒加载引起布局跳动；限制最大高度避免占位期拉长页面） */
/* 详情页长图：按图片真实比例完整展示（不裁切）；懒加载由 loading="lazy" 处理 */
.detail-figure { max-width: 720px; margin: 0 auto; overflow: hidden; }
.detail-figure img { height: auto; object-fit: initial; }
/* 详情长图两列并排（缩篇幅）：桌面两列，手机单列保证文字可读 */
.detail-figure--cols {
  max-width: 1080px;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(10px, 1.6vw, 20px); align-items: start;
}
@media (max-width: 820px) {
  .detail-figure--cols { grid-template-columns: 1fr; }
}

/* ---------- 05 AIGC ---------- */
.flow {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 10px 0; margin-bottom: clamp(44px, 6vw, 72px);
  counter-reset: step;
}
.flow li {
  counter-increment: step;
  display: flex; align-items: center;
  font-size: 14px; font-weight: 600; color: var(--ink);
}
.flow li::before {
  content: counter(step, decimal-leading-zero);
  font-size: 12px; font-weight: 700; letter-spacing: .1em;
  color: var(--accent, var(--purple)); margin-right: 8px;
}
.flow li:not(:last-child)::after {
  content: ""; width: clamp(20px, 3vw, 44px); height: 1px;
  background: linear-gradient(90deg, var(--accent, var(--purple)), rgba(23,23,25,.12));
  margin: 0 14px;
}
.aigc__row {
  display: grid; grid-template-columns: 5fr 7fr; gap: var(--gap); align-items: center;
}
.aigc__img { overflow: hidden; }
.aigc__img img { aspect-ratio: 1 / 1; }
.aigc__img figcaption { margin-top: 10px; font-size: 13px; letter-spacing: .08em; color: var(--muted); }
.aigc__note p { color: var(--text); }

/* 提示词卡片 */
.prompt-pair { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(16px, 2vw, 26px); }
.prompt-card {
  padding: clamp(20px, 2.6vw, 32px);
  background: var(--paper-light);
  border-left: 3px solid var(--blue);
  font-size: 15px;
}
/* 长提示词正文：小字号 + 舒适行高，保持卡片可读 */
.prompt-card p { font-size: 13px; line-height: 1.85; color: var(--ink); }
.prompt-card p b { font-weight: 700; }
.prompt-card--opt { border-left-color: var(--purple); background: rgba(112,86,184,.07); }
.prompt-card__tag {
  display: inline-block; margin-bottom: 12px;
  font-size: 12px; font-weight: 700; letter-spacing: .14em;
  color: var(--blue);
}
.prompt-card--opt .prompt-card__tag { color: var(--purple-deep); }

/* 工作流节点 */
.workflow__canvas {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  padding: clamp(22px, 3vw, 36px);
  background: var(--paper-light);
  border: 1px solid rgba(23,23,25,.1);
}
.wf-node {
  padding: 10px 18px; font-size: 13px; font-weight: 600;
  border: 1.5px solid var(--blue); color: var(--blue); background: var(--white);
}
.wf-node:nth-child(even) { border-color: var(--purple); color: var(--purple-deep); }
.wf-node:not(:last-child) { position: relative; }
.wf-node:not(:last-child)::after {
  content: "→"; position: absolute; right: -14px; top: 50%;
  transform: translateY(-50%); font-size: 12px; color: var(--muted);
}
.workflow__note { margin-top: 16px; font-size: 14px; color: var(--muted); }

/* 传统 × AI 流程 */
.pipeline__cols { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(16px, 2vw, 26px); }
.pipeline__col { padding: clamp(22px, 3vw, 34px); background: var(--paper-light); }
.pipeline__col--ai { background: rgba(112,86,184,.08); border-top: 3px solid var(--purple); }
.pipeline__col h4 { font-size: 16px; color: var(--ink); margin-bottom: 16px; }
.pipeline__col ol { counter-reset: pipe; }
.pipeline__col li {
  counter-increment: pipe; padding: 8px 0; font-size: 14px;
  border-bottom: 1px dashed rgba(23,23,25,.16);
}
.pipeline__col li::before {
  content: counter(pipe) ". "; color: var(--purple); font-weight: 700;
}
.pipeline__eff { margin-top: 18px; font-size: 15px; }
.pipeline__eff b { color: var(--purple-deep); }

/* ---------- 06 跨品类 ---------- */
.cat-block { margin-bottom: clamp(64px, 8vw, 110px); }
.cat-block:last-child { margin-bottom: 0; }
.cat-block__head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 26px; }
.cat-block__num {
  font-size: clamp(48px, 6vw, 76px); font-weight: 800; line-height: 1;
  color: transparent; -webkit-text-stroke: 1.3px var(--tone, var(--purple));
}
.cat-block--purple { --tone: var(--purple); }
.cat-block--blue { --tone: var(--blue); }
.cat-block--teal { --tone: var(--teal); }
.cat-block--orange { --tone: var(--orange); }
.cat-block__name { font-size: clamp(22px, 2.8vw, 32px); font-weight: 700; color: var(--ink); }
.cat-block__grid {
  display: grid; grid-template-columns: 7fr 5fr;
  grid-template-rows: auto auto;
  gap: clamp(14px, 2vw, 24px);
}
.cat-block__key { grid-row: 1 / 3; overflow: hidden; }
.cat-block__key img { aspect-ratio: 16 / 10; height: 100%; transition: transform .4s; }
.cat-block__sub { overflow: hidden; }
.cat-block__sub img { aspect-ratio: 5 / 3.4; transition: transform .4s; }
.cat-block__key:hover img, .cat-block__sub:hover img { transform: scale(1.03); }
.cat-block figure figcaption { margin-top: 8px; font-size: 12px; letter-spacing: .1em; color: var(--muted); }
/* 美妆品类竖图构图校准：框内裁切对准主体（lightbox 放大仍为完整竖图） */
.cat-block__key img[data-img="catBeautyKey"] { object-position: 50% 66%; }
.cat-block__sub img[data-img="catBeautyScene"] { object-position: 50% 32%; }
.cat-block__sub img[data-img="catBeautyPoint"] { object-position: 50% 45%; }
.cat-block__key img[data-img="catFoodKey"] { object-position: 50% 48%; }
.cat-block__sub img[data-img="catFoodScene"] { object-position: 50% 48%; }
.cat-block__sub img[data-img="catFoodPoint"] { object-position: 50% 50%; }
.cat-block__key img[data-img="catHomeKey"] { object-position: 50% 55%; }
.cat-block__sub img[data-img="catHomeScene"] { object-position: 50% 55%; }
.cat-block__sub img[data-img="catHomePoint"] { object-position: 50% 50%; }
.cat-block__key img[data-img="cat3cKey"] { object-position: 50% 45%; }
.cat-block__sub img[data-img="cat3cScene"] { object-position: 50% 52%; }
.cat-block__sub img[data-img="cat3cPoint"] { object-position: 50% 50%; }
.cat-block__strategy {
  margin-top: 20px; max-width: 560px;
  font-size: 15px; color: var(--text);
  padding-left: 16px; border-left: 3px solid var(--tone, var(--purple));
}
.cat-block__strategy p + p { margin-top: 10px; }
.cat-block__foot { display: flex; align-items: flex-end; justify-content: space-between; gap: clamp(20px, 3vw, 48px); }
.cat-block__hint {
  flex-shrink: 0; max-width: 400px; margin: 0;
  font-size: 13px; line-height: 1.8; color: var(--muted);
  padding-left: 14px; border-left: 2px solid rgba(23,23,25,.14);
}
/* 偶数品类错位：右侧大图 */
.cat-block:nth-child(even) .cat-block__grid { grid-template-columns: 5fr 7fr; }
.cat-block:nth-child(even) .cat-block__key { grid-column: 2; grid-row: 1 / 3; }
.cat-block:nth-child(even) .cat-block__sub { grid-column: 1; }

/* ---------- 07 数据驱动 ---------- */
.data-fields {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0 clamp(20px, 3vw, 48px);
  border-top: 1.5px solid var(--ink);
}
.data-fields > div {
  display: flex; gap: 8px; padding: 16px 0;
  border-bottom: 1px solid rgba(23,23,25,.15);
  font-size: 15px;
}
.data-fields dt { font-weight: 700; color: var(--ink); flex: none; }
.data-fields dd { color: var(--muted); }
.data-empty { margin-top: 22px; font-size: 14px; color: var(--muted); letter-spacing: .05em; }
/* 两组数据案例 */
.data-cases { display: flex; flex-direction: column; gap: clamp(44px, 5vw, 72px); }
.data-case__head {
  display: flex; align-items: baseline; gap: 16px;
  border-top: 1.5px solid var(--ink); padding-top: 16px;
}
.data-case__num {
  font-size: 30px; font-weight: 800; line-height: 1;
  color: var(--orange); letter-spacing: .04em;
}
.data-case__title { font-size: 19px; font-weight: 700; color: var(--ink); }
.data-case .compare { margin-top: 24px; }
.data-case .data-fields { border-top: none; margin-top: 20px; }

/* ---------- 08 视觉基本功 ---------- */
.fund__grid {
  display: grid; grid-template-columns: repeat(12, 1fr);
  gap: clamp(14px, 2vw, 24px);
}
.fund__item { overflow: hidden; display: flex; flex-direction: column; }
.fund__item--s6 { grid-column: span 6; }
.fund__item--s4 { grid-column: span 4; }
.fund__item--s12 { grid-column: span 12; }
.fund__item img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.fund__item--game img { aspect-ratio: 2 / 1; }
.fund__item--portrait img { aspect-ratio: 4 / 5; }
.fund__item--pos30 img { object-position: 30% 50%; }
.fund__item--fit { background: #fff; }
.fund__item--fit img { object-fit: contain; }
.fund__item--nuo img { aspect-ratio: auto; height: auto; object-fit: initial; }
.fund__item:hover img { transform: scale(1.02); }
.fund__item figcaption { margin-top: 10px; font-size: 13px; letter-spacing: .08em; color: var(--muted); }
.fund__note-card {
  grid-column: span 6;
  display: flex; align-items: center;
  padding: 28px 8px 28px 26px;
  border-left: 3px solid var(--orange);
}
.fund__note-text { font-size: 19px; line-height: 1.85; font-weight: 600; color: var(--ink); }

/* ---------- 09 经历与工具 ---------- */
.exp__grid { display: grid; grid-template-columns: 7fr 5fr; gap: var(--gap); }
.exp__strengths { margin-top: clamp(32px, 4vw, 48px); }
.exp__strengths .block-title { margin-bottom: 18px; }
.exp__list li { padding: 22px 0; border-bottom: 1px solid rgba(23,23,25,.15); }
.exp__list li:first-child { padding-top: 0; }
.exp__org { font-size: 18px; font-weight: 700; color: var(--ink); }
.exp__role { margin-top: 4px; font-size: 15px; color: var(--purple-deep); }
.exp__period { margin-top: 4px; font-size: 13px; color: var(--muted); }
.exp__desc { margin-top: 10px; font-size: 14px; line-height: 1.75; color: var(--text); }
/* 技能分组标签 */
.tool-list { display: block; }
.tool-group + .tool-group { margin-top: 22px; }
.tool-group__name { margin-bottom: 10px; font-size: 13px; letter-spacing: .08em; color: var(--muted); }
.tool-group__items { display: flex; flex-wrap: wrap; gap: 10px; }
.tool-group__items li {
  padding: 8px 18px; font-size: 14px;
  background: var(--paper-light); border: 1px solid rgba(23,23,25,.12);
  transition: border-color .25s, color .25s;
}
.tool-group__items li:hover { border-color: var(--purple); color: var(--purple-deep); }

/* 证书与荣誉（右列技能下方） */
.exp__honors { margin-top: clamp(32px, 4vw, 48px); }
.exp__honors .block-title { margin-bottom: 18px; }
.honor-list li {
  padding: 10px 0; font-size: 14px; color: var(--text);
  border-bottom: 1px solid rgba(23,23,25,.12);
}
.honor-list li:first-child { padding-top: 0; }
.honor-list li::before {
  content: ""; display: inline-block;
  width: 6px; height: 6px; margin-right: 10px;
  background: var(--accent, var(--purple)); vertical-align: 2px;
}

/* ---------- 10 联系方式（大面积留白 + 硬边几何紫色块，无渐变光效） ---------- */
.section--dark { background: var(--ink); color: var(--white); position: relative; overflow: hidden; }
.section--dark::before {          /* 平涂深紫几何块，编辑式硬边 */
  content: ""; position: absolute; top: 0; right: 0; bottom: 0;
  width: clamp(120px, 22%, 300px);
  background: rgba(74,57,125,.22);
  border-left: 2px solid var(--purple);
}
.section--dark .section__inner { position: relative; z-index: 1; }
#sec-contact { padding: clamp(110px, 15vw, 190px) 0 clamp(80px, 10vw, 130px); }
.contact .section__en { color: var(--purple); }
.contact__name { font-size: clamp(40px, 5.5vw, 68px); font-weight: 800; color: var(--white); line-height: 1.15; }
.contact__role { margin-top: 18px; font-size: clamp(17px, 2vw, 21px); color: rgba(247,247,244,.85); }
.contact__loc { margin-top: 10px; font-size: 15px; color: var(--muted); }
.contact__closing {
  margin-top: clamp(44px, 6vw, 72px); max-width: 520px;
  font-size: clamp(18px, 2.2vw, 24px); font-weight: 600; line-height: 1.7;
  color: var(--white);
  padding-left: 18px; border-left: 3px solid var(--purple);
}
.contact__meta {
  margin-top: clamp(30px, 4vw, 44px); display: flex; flex-wrap: wrap; gap: 12px 34px;
  font-size: 14px; color: var(--muted);
}
.contact__meta b { color: rgba(247,247,244,.9); font-weight: 600; }
.contact__actions { margin-top: clamp(40px, 5vw, 60px); display: flex; flex-wrap: wrap; gap: 14px; }
.footer {
  max-width: var(--maxw); margin: 90px auto 0;
  padding: 26px clamp(20px, 4vw, 56px) 0;
  border-top: 1px solid rgba(247,247,244,.14);
  font-size: 13px; color: var(--muted);
}

/* ---------- 进场动画（轻量、快速、不影响阅读） ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .5s ease, transform .5s ease; }
.reveal.is-in { opacity: 1; transform: none; }
/* 编号先出现，标题与内容随后 */
.section__head--num.reveal .section__bignum {
  opacity: 0; transform: translateY(10px);
  transition: opacity .4s ease .05s, transform .4s ease .05s;
}
.section__head--num.reveal > div {
  opacity: 0; transform: translateY(10px);
  transition: opacity .45s ease .22s, transform .45s ease .22s;
}
.section__head--num.reveal.is-in .section__bignum,
.section__head--num.reveal.is-in > div { opacity: 1; transform: none; }

/* ---------- 响应式 · 平板 ---------- */
@media (max-width: 1180px) {
  :root { --navw: 120px; }
  .side-nav { padding-left: 20px; }
  .side-nav__children { display: none; }
}
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr 1fr; }
  .exp__grid { grid-template-columns: 1fr; }
}

/* ---------- 响应式 · 手机 ---------- */
@media (max-width: 820px) {
  main { margin-left: 0; padding-top: 76px; }
  .side-nav, .scroll-progress { display: none; }
  /* 能力版块上下内边距收敛至 72—96px（首页保持宽松） */
  .section { padding: 84px 0; }
  /* 锚点跳转时避开固定顶栏，保证编号与标题完整露出 */
  .section, .hero { scroll-margin-top: 88px; }
  /* 标题主动断行：禁止孤字（如"化"单独一行） */
  .br-m { display: block; }
  /* 移动端动画减量：更快、更短 */
  .reveal { opacity: 0; transform: translateY(12px); transition-duration: .3s; }

  /* 顶部固定导航：高度 76px，图标 30px，保留 MHY＋当前分类＋菜单 */
  .top-bar {
    display: flex; align-items: center; gap: 14px;
    position: fixed; top: 0; left: 0; right: 0; height: 76px;
    padding: 0 18px;
    background: rgba(247,247,244,.97);
    border-bottom: 1px solid rgba(23,23,25,.1);
    z-index: 80;
  }
  .top-bar__logo { font-size: 18px; font-weight: 700; letter-spacing: .12em; color: var(--ink); }
  .top-bar__current {
    flex: 1; font-size: 14px; color: var(--purple-deep); font-weight: 600;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  }
  .top-bar__toggle {
    width: 52px; height: 52px; flex: none;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
    background: none; border: none; cursor: pointer;
  }
  .top-bar__toggle span { width: 30px; height: 2.5px; background: var(--ink); border-radius: 1px; transition: transform .3s, opacity .3s; }
  .top-bar__toggle.is-open span:nth-child(1) { transform: translateY(8.5px) rotate(45deg); }
  .top-bar__toggle.is-open span:nth-child(2) { opacity: 0; }
  .top-bar__toggle.is-open span:nth-child(3) { transform: translateY(-8.5px) rotate(-45deg); }
  .top-bar__menu {
    position: fixed; top: 76px; left: 0; right: 0; bottom: 0;
    height: calc(100dvh - 76px);
    background: #F7F7F4;                 /* 不透明，覆盖完整可视高度 */
    display: none; flex-direction: column;
    padding: 8px 0 32px;
    overflow-y: auto;
  }
  .top-bar__menu.is-open { display: flex; }
  .top-bar__menu a {
    display: flex; align-items: baseline; gap: 12px;
    padding: 18px 24px 18px 20px; font-size: 17px; color: #3A3A3E;
    border-top: 1px solid rgba(23,23,25,.07);
    border-left: 4px solid transparent;      /* 预留当前栏目竖线位置 */
  }
  .top-bar__menu a .m-num {
    font-size: 12px; font-weight: 700; letter-spacing: .14em; color: var(--purple);
  }
  .top-bar__menu a:active { color: var(--purple-deep); }
  /* 当前栏目：紫色编号 + 深紫加粗文字 + 4px 紫色竖线 */
  .top-bar__menu a.is-current {
    color: var(--purple-deep); font-weight: 700;
    border-left-color: var(--purple);
  }
  .top-bar__menu a.is-current .m-num { color: var(--purple); }

  /* 首屏 */
  .hero { min-height: calc(100svh - 76px); }
  .hero__inner { grid-template-columns: 1fr; gap: 30px; }
  .hero__visual { aspect-ratio: 16 / 10; box-shadow: 14px 14px 0 rgba(74,57,125,.12); order: 2; }
  .hero__scroll-hint { display: none; }

  /* 关于我 */
  .about__grid { grid-template-columns: 1fr; }
  .about__photo { margin-top: 0; max-width: 420px; }
  .about__stats { grid-template-columns: repeat(3, 1fr); }
  .about__stat + .about__stat { padding-left: 14px; }

  /* 能力总览 */
  .overview__grid { grid-template-columns: 1fr; }
  .ov-item--offset { transform: none; }
  .ov-item--offset:hover { transform: translateY(-4px); }

  /* 作品区块 */
  .compare__row { grid-template-columns: 1fr; }
  .compare__row--trio { grid-template-columns: 1fr; }
  .compare__arrow { transform: rotate(90deg); justify-self: center; }
  .mains-grid { grid-template-columns: repeat(2, 1fr); }
  .work__keywords, .work__mains { margin-left: 0; margin-right: 0; }
  .work__summary { margin-left: 0; text-align: left; }
  .aigc__row { grid-template-columns: 1fr; }
  .prompt-pair, .pipeline__cols { grid-template-columns: 1fr; }
  .flow li:not(:last-child)::after { width: 14px; margin: 0 8px; }

  /* 跨品类：每品类 1 张大主视觉 + 2 张并排小图 + 短说明，控制页面总长 */
  .cat-block__foot { flex-direction: column; align-items: flex-start; gap: 14px; }
  .cat-block__hint { border-left: none; padding-left: 0; max-width: none; }
  .cat-block__grid, .cat-block:nth-child(even) .cat-block__grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
  }
  .cat-block__key, .cat-block:nth-child(even) .cat-block__key {
    grid-column: 1 / -1; grid-row: auto;
  }
  .cat-block:nth-child(even) .cat-block__sub { grid-column: auto; }
  .cat-block__key img { aspect-ratio: 16 / 9; }
  .cat-block__sub img { aspect-ratio: 1 / 1; }

  /* 02→03 交界：移动端底部留白进一步压缩 */
  /* 四个能力区标题区域：上下留白各减约 14px（保留大编号与编辑式排版） */
  #sec-ecommerce, #sec-aigc, #sec-category, #sec-data { padding-top: 72px; }
  #sec-ecommerce .section__head, #sec-aigc .section__head,
  #sec-category .section__head, #sec-data .section__head { margin-bottom: 22px; }
  /* 重点说明文字：字号约降 2px、行高 1.5—1.6，不与章节主标题竞争 */
  .work__brief { font-size: clamp(17px, 4.6vw, 19px); line-height: 1.55; }
  .cat-block__strategy { font-size: 14px; line-height: 1.55; }
  .aigc__note p { font-size: 14px; line-height: 1.55; }
  .workflow__note, .pipeline__eff { font-size: 14px; line-height: 1.55; }

  /* 数据字段 / 基本功 */
  .data-fields { grid-template-columns: 1fr; }
  .data-case__num { font-size: 24px; }
  .data-case__title { font-size: 17px; }
  .fund__grid { grid-template-columns: 1fr; }
  .fund__item--s6, .fund__item--s4, .fund__item--s12, .fund__note-card { grid-column: 1 / -1; }
  .fund__note-text { font-size: 16px; }

  .btn { min-height: 48px; padding: 13px 26px; }
  /* 移动端：紫色几何块收窄，避免干扰按钮区 */
  .section--dark::before { width: 56px; border-left-width: 1.5px; }
}

@media (max-width: 480px) {
  .fund__grid { grid-template-columns: 1fr; }
  .about__stats { grid-template-columns: 1fr; }
  .about__stat { padding: 18px 0; }
  .about__stat + .about__stat { border-left: none; border-top: 1px solid rgba(23,23,25,.15); padding-left: 0; }
}

/* ---------- 图片全屏查看（Lightbox）：零依赖，点击任意作品图打开 ---------- */
img[data-img] { cursor: zoom-in; }
img[data-img][src*="ph-"], img[data-img].img-broken { cursor: default; }  /* 占位图 / 破图不可点 */

.lightbox {
  position: fixed; inset: 0; z-index: 200;
  display: none; align-items: center; justify-content: center;
  padding: clamp(16px, 4vw, 56px);
  background: rgba(23, 23, 25, .93);
  cursor: zoom-out;
  -webkit-tap-highlight-color: transparent;
}
.lightbox.is-open { display: flex; }
.lightbox__img {
  width: auto; height: auto;
  max-width: 100%; max-height: 100%;
  object-fit: contain;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .5);
  cursor: default;
}
/* 超长图（如详情页长图）：遮罩内可纵向滚动，完整查看不清字 */
.lightbox.is-long { align-items: flex-start; overflow-y: auto; }
.lightbox.is-long::-webkit-scrollbar { width: 8px; }
.lightbox.is-long::-webkit-scrollbar-thumb { background: rgba(247, 247, 244, .25); }
.lightbox.is-long::-webkit-scrollbar-track { background: transparent; }
.lightbox.is-long .lightbox__img {
  max-height: none;
  max-width: min(94vw, 820px);
  margin: 0 auto;
}
.lightbox__close {
  position: fixed; top: clamp(12px, 2vw, 24px); right: clamp(12px, 2vw, 24px);
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  font-family: inherit; font-size: 26px; line-height: 1;
  color: #F7F7F4; background: rgba(247, 247, 244, .14);
  border: 1px solid rgba(247, 247, 244, .35);
  cursor: pointer;
  transition: background .2s, border-color .2s;
}
.lightbox__close:hover { background: rgba(247, 247, 244, .26); border-color: rgba(247, 247, 244, .65); }
.lightbox__hint {
  position: fixed; left: 50%; bottom: clamp(14px, 2vw, 22px); transform: translateX(-50%);
  font-size: 12px; letter-spacing: .06em; color: rgba(247, 247, 244, .6);
  pointer-events: none; white-space: nowrap;
}
@media (max-width: 820px) {
  .lightbox__hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal, .section__head--num.reveal .section__bignum,
  .section__head--num.reveal > div { opacity: 1; transform: none; }
}

.footer__beian { margin: 6px 0 0; font-size: 12px; color: rgba(247,247,244,.55); }
.footer__beian a { color: inherit; text-decoration: none; letter-spacing: .02em; }
.footer__beian a:hover { color: #fff; text-decoration: underline; }
.footer__line { margin: 0; }