/* ============================================================
   韦涵运 · 个人网站
   设计系统：纸白 + 墨蓝 + 朱红；宋体标题 + 黑体正文
   ============================================================ */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --paper:#faf8f3;
  --card:#fffdf8;
  --ink:#1b2432;
  --body:#37414e;
  --muted:#5f6672;
  --line:#ddd6c8;
  --line-soft:#e8e2d5;
  --navy:#1f3a5f;
  --red:#cf3f21;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",SimSun,Georgia,serif;
  --sans:"Microsoft YaHei","PingFang SC","Noto Sans SC",system-ui,sans-serif;
  --maxw:1120px;
  --pad:56px;
}
html[lang="en"]{
  --serif:"Georgia","Iowan Old Style","Times New Roman",serif;
  --sans:"Segoe UI","Helvetica Neue",Arial,"Microsoft YaHei",sans-serif;
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
::selection{background:#1f3a5f;color:#fff}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}

/* ---------- 导航 ---------- */
.nav{
  display:flex;justify-content:space-between;align-items:center;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.brand{font-family:var(--serif);font-size:16px;font-weight:700;letter-spacing:.08em;text-decoration:none;white-space:nowrap}
.nav .links a{font-size:12px;color:var(--muted);text-decoration:none;margin-left:28px;letter-spacing:.08em;transition:color .15s}
.nav .links a:hover{color:var(--navy)}
.nav .back{font-size:12px;color:var(--muted);text-decoration:none;letter-spacing:.08em}
.nav .back:hover{color:var(--navy)}
.nav .links a.lang{
  border:1px solid var(--line);border-radius:3px;padding:3px 8px;
  font-size:11px;letter-spacing:.08em;color:var(--muted);text-decoration:none;
  margin-left:20px;white-space:nowrap;transition:color .15s,border-color .15s;
}
.nav .links a.lang:hover{color:var(--navy);border-color:var(--navy)}

/* ---------- 首屏 ---------- */
.hero{
  display:flex;justify-content:space-between;align-items:flex-end;
  gap:56px;padding:72px 0 52px;border-bottom:1px solid var(--line);
}
.hero-text{flex:1 1 auto;min-width:0}
.kicker{
  font-size:11px;letter-spacing:.32em;color:var(--navy);
  text-transform:uppercase;margin-bottom:22px;
}
h1.name{
  font-family:var(--serif);
  font-size:clamp(56px,9vw,124px);
  line-height:.94;letter-spacing:.02em;font-weight:700;
}
html[lang="en"] h1.name{font-size:clamp(44px,6.6vw,92px);line-height:1.02;letter-spacing:0}
.lede{
  font-family:var(--serif);font-size:clamp(18px,1.55vw,22px);
  line-height:1.72;margin-top:26px;max-width:660px;color:#2a3444;text-wrap:balance;
}
.meta{font-size:13px;color:var(--muted);margin-top:18px;letter-spacing:.02em}
.meta-sub{margin-top:5px;font-size:12.5px;color:#6a7280}
.meta span{white-space:nowrap}
.meta .sep{margin:0 1.2em;color:#a9a294}
.nb{white-space:nowrap}
.tags{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}
.tags span{
  font-size:12px;border:1px solid var(--line);padding:6px 14px;
  color:#3b4656;border-radius:3px;letter-spacing:.04em;background:rgba(255,255,255,.35);
}
.portrait{
  flex:0 0 320px;width:320px;height:400px;
  border:1px solid var(--line);border-radius:6px;overflow:hidden;
  background:#fff;
}
.portrait img{width:100%;height:100%;object-fit:cover;object-position:50% 20%}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}
.stat{padding:24px 24px 22px;border-right:1px solid var(--line)}
.stat:first-child{padding-left:0}
.stat:last-child{border-right:none}
.stat b{display:block;font-family:var(--serif);font-size:34px;font-weight:700;color:var(--navy);line-height:1.1}
.stat i{display:block;font-style:normal;font-size:12px;color:var(--muted);margin-top:7px;letter-spacing:.03em}

/* ---------- 区块 ---------- */
.section{padding:64px 0 0;scroll-margin-top:24px}
.sec-head{display:flex;align-items:baseline;gap:14px}
.sec-head .num{font-family:Georgia,serif;font-size:13px;color:var(--navy);letter-spacing:.1em}
.sec-head h2{font-family:var(--serif);font-size:clamp(26px,3vw,34px);font-weight:700;letter-spacing:.01em}
.sec-sub{font-size:12px;color:var(--muted);margin:10px 0 30px;letter-spacing:.03em}

/* ---------- 案例卡 ---------- */
.cards{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.card{
  display:block;text-decoration:none;color:inherit;background:var(--card);
  border:1px solid var(--line);border-radius:8px;padding:28px 28px 24px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{transform:translateY(-3px);border-color:#c3cad3;box-shadow:0 20px 44px -32px rgba(27,36,50,.5)}
.card .tagline{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.card .tag{font-size:11px;color:var(--navy);background:#eceff2;padding:4px 9px;border-radius:3px;letter-spacing:.06em}
.card .idx{font-family:Georgia,serif;font-size:13px;color:#b6ac9a}
.card h3{font-family:var(--serif);font-size:23px;font-weight:700;line-height:1.4}
.card .role{font-size:12px;color:var(--muted);margin:8px 0 14px;letter-spacing:.03em}
.card p{font-size:13.5px;line-height:1.85;color:#475569}
.card .metrics{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.card .metrics span{font-size:11px;color:#5f6672;background:#f2eee4;padding:4px 8px;border-radius:3px}
.card .more{margin-top:18px;font-size:12px;color:var(--navy);letter-spacing:.08em}

/* ---------- 时间线 ---------- */
.tl{display:grid;grid-template-columns:112px 1fr;gap:26px;padding:22px 0;border-top:1px solid var(--line)}
.tl:last-child{border-bottom:1px solid var(--line)}
.tl .year{font-family:Georgia,serif;font-size:13px;color:var(--navy);padding-top:3px;letter-spacing:.02em}
.tl h4{font-size:16px;font-weight:700;letter-spacing:.01em}
.tl p{font-size:13.5px;color:#475569;line-height:1.8;margin-top:6px}

/* ---------- 技能 ---------- */
.skills{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;padding-top:4px}
.skill h4{font-size:11px;letter-spacing:.16em;color:var(--navy);text-transform:uppercase;margin-bottom:10px}
.skill p{font-size:13.5px;line-height:2;color:#475569}

/* ---------- 联系 ---------- */
.contact{
  margin-top:72px;background:var(--navy);color:#f6f2e9;
  padding:44px 46px;display:flex;justify-content:space-between;align-items:flex-end;gap:24px;
}
.contact h2{font-family:var(--serif);font-size:clamp(32px,3.6vw,42px);font-weight:700;line-height:1.1}
.contact p{margin-top:14px;font-size:13px;color:#c9d2dc;line-height:1.9}
.contact p .ci{white-space:nowrap}
.contact p .dot{margin:0 .55em;color:#8fa0b3}
.contact a.mail{color:#f6f2e9;text-decoration:none;border-bottom:1px solid var(--red)}
.contact .btn{flex:0 0 auto}
.btn{
  display:inline-block;background:var(--red);color:#fff;font-size:12px;
  letter-spacing:.14em;padding:14px 22px;text-decoration:none;white-space:nowrap;
  transition:background .15s;
}
.btn:hover{background:#b8351a}

/* ---------- 页脚 ---------- */
.foot{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:11px;color:#8b8f96;padding:26px 0 44px;letter-spacing:.04em;
}

/* ============================================================
   案例详情页
   ============================================================ */
.case-hero{padding:56px 0 40px;border-bottom:1px solid var(--line)}
.case-hero .kicker{margin-bottom:18px}
.case-hero h1{
  font-family:var(--serif);font-size:clamp(30px,4.6vw,54px);
  line-height:1.22;font-weight:700;max-width:900px;letter-spacing:.01em;
}
.case-meta{display:flex;gap:10px 30px;margin-top:24px;font-size:12px;color:var(--muted);flex-wrap:wrap;letter-spacing:.03em}
.case-meta b{color:var(--ink);font-weight:600}
.case-lede{font-family:var(--serif);font-size:clamp(16px,1.5vw,18px);line-height:1.95;margin-top:24px;max-width:780px;color:#37414e}
.cbody{display:grid;grid-template-columns:150px 1fr;gap:44px;padding:46px 0 0}
.cbody .side{font-family:Georgia,serif;font-size:13px;color:var(--navy);letter-spacing:.1em;padding-top:8px}
.cbody h2{font-family:var(--serif);font-size:clamp(24px,2.6vw,30px);font-weight:700;margin-bottom:16px;letter-spacing:.01em}
.cbody p{font-size:15px;line-height:2;color:#37414e;margin-bottom:14px;max-width:720px}
.cbody ul{margin:6px 0 14px 0;padding-left:0;list-style:none;max-width:720px}
.cbody li{font-size:15px;line-height:2;color:#37414e;padding-left:18px;position:relative}
.cbody li::before{content:"";position:absolute;left:0;top:14px;width:6px;height:1px;background:var(--navy)}
.metrics3{
  display:grid;grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  margin:24px 0 10px;max-width:720px;
}
.metrics3 div{padding:22px 20px 20px;border-right:1px solid var(--line)}
.metrics3 div:first-child{padding-left:0}
.metrics3 div:last-child{border-right:none}
.metrics3 b{display:block;font-family:var(--serif);font-size:40px;color:var(--navy);line-height:1}
.metrics3 i{display:block;font-style:normal;font-size:12px;color:var(--muted);margin-top:8px;letter-spacing:.02em}
.note{border-left:2px solid var(--red);padding:4px 0 4px 18px;margin:22px 0;font-size:14px;line-height:1.95;color:#4a5462;max-width:700px}
.case-nav{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:64px;padding-top:26px;border-top:1px solid var(--line)}
.case-nav a{font-size:13px;color:var(--navy);text-decoration:none;letter-spacing:.04em}
.case-nav a:hover{text-decoration:underline}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:900px){
  .cards{grid-template-columns:1fr}
  .card h3{font-size:22px}
}

@media (max-width:1023px){
  :root{--pad:40px}
  .hero{gap:32px;padding:56px 0 44px}
  .portrait{flex-basis:220px;width:220px;height:275px}
  .lede{max-width:100%}
  .nav .links a{margin-left:20px}
  .cbody{grid-template-columns:110px 1fr;gap:28px}
  .contact{padding:36px 34px}
}

@media (max-width:767px){
  :root{--pad:20px}
  .nav{padding:18px 0}
  .nav .links a{margin-left:14px;font-size:11px;letter-spacing:.04em}
  .nav .links a.lang{margin-left:10px;padding:2px 7px;font-size:10px}

  .hero{display:flex;flex-direction:column;align-items:flex-start;gap:0;padding:40px 0 36px}
  .portrait{order:-1;width:128px;height:160px;flex-basis:auto;margin-bottom:22px}
  h1.name{font-size:56px;line-height:1}
  .lede{margin-top:18px;font-size:18px;line-height:1.75}
  .meta{font-size:12px;line-height:1.8}
  .meta .sep{display:none}
  .meta span{display:block}
  .meta-sub span{display:inline}
  .meta-sub .sep{display:inline;margin:0 .5em}
  .tags{margin-top:20px;gap:8px}
  .tags span{padding:5px 11px;font-size:11px}

  .stats{grid-template-columns:1fr 1fr}
  .stat{padding:18px 16px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
  .stat:first-child{padding-left:16px}
  .stat:nth-child(2n){border-right:none}
  .stat:nth-child(n+3){border-bottom:none}
  .stat b{font-size:28px}

  .section{padding:44px 0 0}
  .sec-sub{margin-bottom:22px}
  .cards{grid-template-columns:1fr}
  .card{padding:22px 20px 20px}
  .card h3{font-size:20px}

  .tl{grid-template-columns:1fr;gap:4px;padding:18px 0}
  .tl .year{padding-top:0}
  .tl h4{font-size:15px}

  .skills{grid-template-columns:1fr;gap:20px}

  .contact{flex-direction:column;align-items:flex-start;padding:30px 22px;margin-top:48px;gap:22px}
  .contact p{display:flex;flex-direction:column;gap:2px}
  .contact p .dot{display:none}
  .contact .btn{width:100%;text-align:center}

  .case-hero{padding:36px 0 30px}
  .case-meta{gap:8px 18px}
  .cbody{grid-template-columns:1fr;gap:8px;padding:32px 0 0}
  .cbody .side{padding-top:0}
  .cbody p,.cbody li{font-size:14.5px;line-height:1.95}
  .metrics3 div{padding:16px 12px}
  .metrics3 b{font-size:30px}
  .case-nav{margin-top:44px;flex-direction:column;gap:12px}
  .foot{flex-direction:column;gap:6px;padding:22px 0 36px}
  html[lang="en"] h1.name{font-size:46px}
}

/* 超窄屏：导航换两行，避免挤压 */
@media (max-width:430px){
  html[lang="en"] .nav{flex-wrap:wrap;row-gap:6px}
  html[lang="en"] .nav .links{width:100%;display:flex;justify-content:space-between;margin-top:2px}
  html[lang="en"] .nav .links a{margin-left:0}
}

/* 打印：只留正文 */
@media print{
  .nav,.contact,.case-nav,.foot{display:none}
  body{background:#fff}
}