/* ================================================================
   陆明 · 个人网站  样式
   风格：瑞士国际主义（Swiss Modernism 2.0）＋ 编辑感
   刻意的"反 AI 审美"：无渐变、无紫/粉、无 emoji、无 box-shadow 卡片
   暖纸白 + 墨黑 + 编辑红点睛
   ================================================================ */

/* ========== 令牌 ========== */
:root {
  --bg:        #FAF9F6;   /* 暖纸白 */
  --fg:        #141414;   /* 墨黑 */
  --muted:     #6B6B6B;   /* 灰度二级字 */
  --accent:    #DC4128;   /* 编辑红 — 编号、链接、强调 */
  --border:    #E0DDD5;   /* 淡纸纹分隔线 */
  --surface:   #F3F1EC;   /* 交替区微暖底 */
  --canvas:    #FAF9F6;   /* 同背景 */
  --maxw:      1260px;
  --radius:    0;         /* 方角 — 瑞士风格反圆角 */
  --serif-zh:  "Noto Serif SC", "PMingLiU", "华文宋体", "Georgia", serif;
  --serif:     "Playfair Display", "Noto Serif SC", "Georgia", serif;
  --sans:      "Inter", "Noto Sans SC", system-ui, sans-serif;
  --mono:      "JetBrains Mono", "SF Mono", "Fira Code", monospace;
}

[data-theme="dark"] {
  --bg:        #141414;
  --fg:        #E8E4DC;
  --muted:     #969488;
  --accent:    #E86A4E;
  --border:    #2C2C28;
  --surface:   #1C1C1A;
  --canvas:    #141414;
}

/* ========== 基础 ========== */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; font-size:18px; }
body {
  font-family: var(--sans);
  font-weight:400;
  line-height:1.75;
  color:var(--fg);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a { color:inherit; text-decoration:none; }
.wrap { max-width:var(--maxw); margin:0 auto; padding:0 48px; }

/* ========== 排版层级 ========== */
h1,h2,h3 { font-family:var(--serif); font-weight:700; letter-spacing:-0.01em; }
h1 { font-size:clamp(48px,8vw,96px); line-height:1.05; }
h2 { font-size:clamp(28px,4vw,48px); line-height:1.2; }
h3 { font-size:22px; }
p  { font-size:clamp(16px,1.8vw,18px); max-width:580px; }
.mono { font-family:var(--mono); font-size:11px; letter-spacing:0.12em; text-transform:uppercase; color:var(--accent); }
.btn {
  display:inline-flex; align-items:center; justify-content:center;
  font-family:var(--mono); font-size:12px; letter-spacing:0.08em; text-transform:uppercase;
  padding:14px 32px; border:1.5px solid var(--fg); cursor:pointer; transition:all .25s; background:transparent; color:var(--fg);
}
.btn:hover { background:var(--fg); color:var(--bg); }
.btn--primary { background:var(--fg); color:var(--bg); }
.btn--primary:hover { background:var(--accent); border-color:var(--accent); }
.btn--ghost { border-color:var(--border); }
.iconbtn { background:none; border:none; cursor:pointer; font-size:20px; color:var(--fg); padding:8px; }

/* ========== 导航 ========== */
.nav { position:fixed; top:0; left:0; right:0; z-index:100; background:var(--bg); border-bottom:1px solid var(--border); }
.nav__inner { display:flex; align-items:center; height:68px; gap:40px; }
.nav__brand { font-family:var(--serif); font-weight:700; font-size:22px; flex-shrink:0; }
.nav__brand span { font-family:var(--mono); font-size:10px; color:var(--muted); display:block; line-height:1; }
.nav__links { display:flex; gap:32px; flex-wrap:wrap; align-items:center; }
.nav__links a { font-family:var(--mono); font-size:11px; letter-spacing:0.06em; text-transform:uppercase; color:var(--muted); transition:color .2s; }
.nav__links a:hover,.nav__links a.active { color:var(--accent); }
.nav__download { color:var(--fg) !important; border:1px solid var(--border); padding:4px 10px; transition:all .2s !important; }
.nav__download:hover { background:var(--fg); color:var(--bg) !important; border-color:var(--fg); }
.nav__tools { margin-left:auto; display:flex; gap:8px; align-items:center; }
.menu { display:none; font-size:24px; }

/* ========== 首屏 ========== */
.hero { display:flex; flex-direction:column; justify-content:center; min-height:100vh; position:relative; padding:120px 0 64px; }
.hero__inner { display:flex; flex-direction:row; align-items:flex-start; gap:72px; }
.hero__content { flex:1; min-width:0; }
.hero__eyebrow { margin-bottom:16px; }
.hero__title { margin-bottom:24px; max-width:800px; }
.hero__note { font-size:18px; color:var(--muted); max-width:480px; margin-bottom:40px; }
.hero__actions { display:flex; gap:16px; flex-wrap:wrap; margin-bottom:64px; }
.hero__stats { display:flex; gap:48px; flex-wrap:wrap; }
.hero__stats .stat { display:flex; flex-direction:column; gap:2px; }
.hero__stats .stat .num { font-family:var(--mono); font-size:36px; font-weight:500; color:var(--accent); }
.hero__stats .stat label { font-family:var(--mono); font-size:10px; text-transform:uppercase; color:var(--muted); letter-spacing:0.08em; }
.hero__scroll { position:absolute; bottom:24px; right:48px; }

/* 首屏照片 */
.hero__photo-wrap { flex-shrink:0; }
.hero__photo { width:260px; height:320px; border-radius:0; object-fit:cover; object-position:center top; border:1.5px solid var(--border); filter:grayscale(0.15); transition:filter .3s; display:block; }
.hero__photo:hover { filter:grayscale(0); }
.hero__photo-name { padding-top:14px; border-top:1.5px solid var(--border); margin-top:14px; font-family:var(--serif); font-weight:700; font-size:72px; letter-spacing:-0.02em; line-height:1.0; }
.hero__photo-name span { display:block; font-family:var(--mono); font-size:10px; color:var(--muted); letter-spacing:0.12em; text-transform:uppercase; margin-top:6px; }

/* ========== 板块 ========== */
.section { padding:112px 0; }
.section--alt { background:var(--surface); }
.section__no { display:block; margin-bottom:12px; }
.section__title { margin-bottom:32px; }
.section__head--row { display:flex; flex-direction:column; margin-bottom:56px; }
.grid-2 { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.6fr); gap:80px; align-items:start; }
.section__body p { margin-bottom:20px; max-width:560px; }

/* ========== 能力矩阵 ========== */
.caps { display:grid; grid-template-columns:repeat(2,1fr); gap:40px; }
.cap { display:flex; flex-direction:column; gap:12px; padding-bottom:32px; border-bottom:1px solid var(--border); }
.cap .cap__no { font-family:var(--mono); font-size:13px; color:var(--accent); }
.cap h3 { font-family:var(--serif); font-size:24px; }
.cap .cap__tags { display:flex; gap:8px; flex-wrap:wrap; margin-top:4px; }
.cap .cap__tags span { font-family:var(--mono); font-size:10px; padding:4px 10px; border:1px solid var(--border); color:var(--muted); letter-spacing:0.04em; }

/* ========== 精选项目 ========== */
.projects { display:flex; flex-direction:column; gap:56px; }
.project { padding-bottom:56px; border-bottom:1px solid var(--border); }
.project__top { display:flex; align-items:baseline; gap:16px; margin-bottom:8px; }
.project__no { font-family:var(--mono); font-size:13px; color:var(--accent); }
.project__period { font-family:var(--mono); font-size:10px; color:var(--muted); }
.project h3 { font-family:var(--serif); font-size:28px; margin-bottom:6px; }
.project__role { font-family:var(--mono); font-size:11px; color:var(--accent); margin-bottom:12px; }
.project__summary { color:var(--fg); margin-bottom:16px; max-width:100%; }
.project__points { list-style:none; margin-bottom:16px; }
.project__points li { position:relative; padding-left:16px; margin-bottom:6px; font-size:16px; color:var(--muted); max-width:100%; }
.project__points li::before { content:"—"; position:absolute; left:0; color:var(--accent); }
.project__result { font-family:var(--serif); font-style:italic; font-size:17px; padding:16px 24px; border-left:3px solid var(--accent); color:var(--fg); max-width:100%; }
.project__tags { display:flex; gap:8px; flex-wrap:wrap; margin-top:12px; }
.project__tags span { font-family:var(--mono); font-size:10px; padding:3px 8px; border:1px solid var(--border); color:var(--muted); }

/* ========== 作品 ========== */
.works { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.work { border:1px solid var(--border); padding:28px; display:flex; flex-direction:column; gap:10px; transition:border-color .3s; }
.work:hover { border-color:var(--accent); }
.work .work__no { font-family:var(--mono); font-size:13px; color:var(--accent); }
.work h3 { font-family:var(--serif); font-size:22px; }
.work .work__kind { font-family:var(--mono); font-size:10px; color:var(--muted); }
.work p { font-size:15px; color:var(--muted); max-width:100%; }
.work__points { list-style:none; margin-top:8px; margin-bottom:4px; display:flex; flex-direction:column; gap:4px; }
.work__points li { font-size:14px; color:var(--muted); padding-left:14px; position:relative; line-height:1.6; }
.work__points li::before { content:"—"; position:absolute; left:0; color:var(--accent); font-size:12px; }
.work .work__tags { display:flex; gap:6px; flex-wrap:wrap; margin-top:auto; }
.work .work__tags span { font-family:var(--mono); font-size:10px; padding:2px 8px; border:1px solid var(--border); color:var(--muted); }
.work .work__link { font-family:var(--mono); font-size:11px; color:var(--accent); margin-top:8px; display:inline-flex; align-items:center; gap:4px; }
.work .work__link:hover { text-decoration:underline; }

/* 作品截图 */
.work__thumb-wrap { overflow:hidden; margin:4px 0 8px; }
.work__thumb { width:100%; height:auto; display:block; border:1px solid var(--border); transition:opacity .25s; }
.work:hover .work__thumb { opacity:0.92; }

/* ========== 时间线 ========== */
.timeline { display:flex; flex-direction:column; gap:0; max-width:900px; padding-left:32px; border-left:2px solid var(--border); }
.timeline__item { position:relative; padding-bottom:48px; padding-left:32px; }
.timeline__item:last-child { padding-bottom:0; }
.timeline__dot { position:absolute; left:-7px; top:6px; width:12px; height:12px; background:var(--accent); }
.timeline__period { font-family:var(--mono); font-size:10px; color:var(--accent); margin-bottom:4px; }
.timeline__item h3 { font-family:var(--serif); font-size:22px; margin-bottom:2px; }
.timeline__sub { font-family:var(--mono); font-size:11px; color:var(--muted); margin-bottom:12px; }
.timeline__desc { font-size:16px; color:var(--muted); margin-bottom:12px; max-width:100%; }
.timeline__points { list-style:none; display:flex; flex-direction:column; gap:6px; margin-top:4px; }
.timeline__points li { font-size:15px; color:var(--muted); display:flex; gap:10px; align-items:baseline; }
.timeline__label { font-family:var(--mono); font-size:10px; letter-spacing:0.06em; text-transform:uppercase; color:var(--accent); flex-shrink:0; padding-top:2px; min-width:52px; }

/* ========== 论文 ========== */
.papers { display:flex; flex-direction:column; gap:20px; max-width:780px; }
.paper { padding-bottom:20px; border-bottom:1px solid var(--border); }
.paper:last-child { border:none; }
.paper h3 { font-family:var(--serif); font-size:16px; line-height:1.4; font-weight:500; margin-bottom:4px; }
.paper .paper__meta { font-family:var(--mono); font-size:10px; color:var(--muted); }
.paper a { font-family:var(--mono); font-size:10px; color:var(--accent); display:inline-block; margin-top:4px; }
.paper a:hover { text-decoration:underline; }

/* ========== 联系 ========== */
.section--contact { text-align:center; }
.contact__title { font-family:var(--serif); font-size:clamp(32px,5vw,56px); margin-top:16px; margin-bottom:48px; }
.contact__links { display:flex; flex-direction:column; align-items:center; gap:16px; }
.contact__links .clink { font-family:var(--mono); font-size:13px; color:var(--muted); display:flex; align-items:center; gap:8px; }
.contact__links .clink:hover { color:var(--accent); }

/* ========== 页脚 ========== */
.foot { padding:32px 0; border-top:1px solid var(--border); }
.foot__inner { display:flex; align-items:center; justify-content:space-between; gap:16px; font-size:13px; color:var(--muted); }
.foot__inner .mono { color:var(--muted); }
.foot__links { display:flex; gap:20px; }
.foot__links a { font-family:var(--mono); font-size:11px; letter-spacing:0.06em; text-transform:uppercase; color:var(--muted); transition:color .2s; }
.foot__links a:hover { color:var(--accent); }

/* ========== 滚动浮现 ========== */
.reveal { opacity:0; transform:translateY(28px); transition:opacity .7s cubic-bezier(.22,.61,.36,1),transform .7s cubic-bezier(.22,.61,.36,1); }
.reveal.visible { opacity:1; transform:none; }

/* ========== 移动端 ========== */
@media (max-width:768px) {
  .wrap { padding:0 20px; }
  h1 { font-size:clamp(36px,12vw,60px); }
  .grid-2 { grid-template-columns:1fr; gap:32px; }
  .caps { grid-template-columns:1fr; }
  .works { grid-template-columns:1fr; }
  .nav__links { display:none; flex-direction:column; position:absolute; top:68px; left:0; right:0; background:var(--bg); padding:20px; border-bottom:1px solid var(--border); gap:16px; }
  .nav__links.open { display:flex; }
  .menu { display:block; }
  .hero { padding:100px 0 48px; }
  .hero__inner { flex-direction:column; gap:32px; align-items:flex-start; }
  .hero__photo { width:120px; height:148px; }
  .hero__stats { gap:24px; }
  .hero__scroll { display:none; }
  .projects { gap:40px; }
  .project { padding-bottom:40px; }
  .timeline { padding-left:20px; }
  .timeline__item { padding-left:24px; }
}

/* ========== 减速动效 ========== */
@media (prefers-reduced-motion:reduce) {
  *,*::before,*::after { transition-duration:0s !important; animation-duration:0s !important; }
  .reveal { opacity:1; transform:none; }
}

/* ========== 灯箱（点击截图放大） ========== */
.lightbox { position:fixed; inset:0; z-index:1000; display:flex; align-items:center; justify-content:center; opacity:0; transition:opacity .25s; }
.lightbox--in { opacity:1; }
.lightbox--out { opacity:0; }
.lightbox__bg { position:absolute; inset:0; background:rgba(20,20,20,0.88); cursor:zoom-out; }
.lightbox__img { position:relative; max-width:90vw; max-height:85vh; object-fit:contain; border:1px solid var(--border); z-index:1; }
@media (max-width:768px) { .lightbox__img { max-width:96vw; max-height:80vh; } }