/* =====================================================================
   左岸时空 - 产品经理个人主页（深色高端编辑风，参考 Steven Kotler 站）
   结构：深色导航 + 深色 Hero + 白色圆角模块卡 + 深色 CTA/页脚
   ===================================================================== */

:root {
  --paper: #f2f1ec;
  --card: #ffffff;
  --ink: #16181d;
  --ink-2: #3a3d44;
  --muted: #767a82;
  --line: #e6e4dd;
  --dark: #0c0e13;
  --dark-2: #151922;
  --dark-3: #1d222c;
  --on-dark: #f3f1ea;
  --on-dark-2: #a9adb6;
  --accent: #2f6df0;
  --accent-soft: rgba(47, 109, 240, .12);
  --gold: #c9a24b;
  --radius: 22px;
  --radius-sm: 14px;
  --shadow: 0 18px 50px rgba(20, 21, 26, .10), 0 4px 14px rgba(20, 21, 26, .05);
  --container: 1140px;
  --nav-h: 68px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
          -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
li { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 28px; }
::selection { background: var(--ink); color: var(--paper); }

/* ---------- 导航（深色） ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(12, 14, 19, .92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.nav-inner { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand-logo { height: 32px; width: auto; }
.nav { display: flex; align-items: center; gap: 30px; }
.nav a { color: var(--on-dark-2); font-size: 15px; position: relative; padding: 4px 0; transition: color .2s; }
.nav a:hover, .nav a.active { color: #fff; }
.nav a::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px; background: var(--accent); transition: width .25s ease; }
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav-toggle { display: none; border: 0; background: none; cursor: pointer; width: 40px; height: 40px; flex-direction: column; gap: 5px; }
.nav-toggle span { width: 22px; height: 2px; background: #fff; border-radius: 2px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: 1.5px solid transparent;
  transition: transform .2s, background .2s, color .2s, border-color .2s;
}
.btn-primary { background: #fff; color: var(--dark); }
.btn-primary:hover { transform: translateY(-2px); background: #e9e9e9; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { transform: translateY(-2px); background: #245ad6; }
.btn-ghost-d { background: transparent; color: #fff; border-color: rgba(255,255,255,.28); }
.btn-ghost-d:hover { border-color: #fff; transform: translateY(-2px); }

/* ---------- HERO（深色） ---------- */
.hero {
  background: radial-gradient(120% 120% at 80% 0%, #1a2230 0%, var(--dark) 55%);
  color: var(--on-dark);
  position: relative; overflow: hidden;
  padding: 64px 0 0;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: radial-gradient(70% 70% at 70% 20%, #000, transparent 80%);
  -webkit-mask-image: radial-gradient(70% 70% at 70% 20%, #000, transparent 80%);
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: end;
  min-height: 620px;
}
.hero-copy { padding-bottom: 56px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 1.5px;
  color: #fff; background: var(--accent); padding: 7px 15px; border-radius: 999px;
  margin-bottom: 26px;
}
.hero-name { font-size: clamp(56px, 9vw, 104px); line-height: .95; font-weight: 800; letter-spacing: -3px; }
.hero-sub { margin-top: 18px; font-family: var(--mono); font-size: 13px; letter-spacing: 3px; color: var(--on-dark-2); text-transform: uppercase; }
.hero-lead { margin-top: 20px; font-size: clamp(17px, 2vw, 21px); color: #d9dbe1; max-width: 34ch; line-height: 1.6; }
.hero-actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero-meta { margin-top: 40px; font-family: var(--mono); font-size: 11.5px; letter-spacing: 1px; color: var(--on-dark-2); display: flex; gap: 18px; flex-wrap: wrap; }
.hero-meta a { color: var(--on-dark-2); transition: color .2s; }
.hero-meta a:hover { color: #fff; }
.hero-media { align-self: end; justify-self: end; }
.hero-photo { width: 100%; max-width: 460px; border-radius: 18px 18px 0 0; aspect-ratio: 4/5; object-fit: cover; box-shadow: 0 -10px 60px rgba(0,0,0,.4); }

/* ---------- 模块卡（白色圆角） ---------- */
.section { padding: 84px 0; }
.mod {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 48px;
  border: 1px solid rgba(20,21,26,.04);
}
.mod + .mod { margin-top: 30px; }
.mod-head { margin-bottom: 30px; }
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 3px; color: var(--accent); text-transform: uppercase; }
.mod-title { font-size: clamp(26px, 3.4vw, 36px); font-weight: 800; letter-spacing: -.5px; margin-top: 8px; line-height: 1.2; }
.mod-lead { color: var(--muted); margin-top: 12px; font-size: 16px; max-width: 60ch; }

/* 两栏：文字 + 媒体 */
.mod-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.mod-grid.reverse .mg-media { order: -1; }
.mg-body p { color: var(--ink-2); font-size: 16px; }
.mg-body .mod-title { margin-bottom: 16px; }
.mg-media img { width: 100%; border-radius: var(--radius-sm); object-fit: cover; aspect-ratio: 4/3; box-shadow: 0 10px 30px rgba(20,21,26,.12); }

/* 个人优势列表 */
.strength-list { margin-top: 8px; }
.strength-list li {
  display: grid; grid-template-columns: 46px 1fr; gap: 16px; align-items: start;
  padding: 18px 0; border-top: 1px solid var(--line);
}
.strength-list li:first-child { border-top: 0; }
.sl-no { font-family: var(--mono); font-size: 13px; color: var(--accent); padding-top: 3px; }
.sl-title { font-size: 17px; font-weight: 700; }
.sl-desc { color: var(--muted); font-size: 14.5px; margin-top: 4px; }

/* 工作流 */
.flow-list { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 10px; }
.flow-list li {
  font-size: 14px; padding: 9px 16px; border-radius: 999px;
  background: var(--paper); border: 1px solid var(--line); color: var(--ink-2);
}
.flow-list li.is-end { background: var(--ink); color: #fff; border-color: var(--ink); }

/* 关键数据 */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.stat { background: var(--dark); color: var(--on-dark); border-radius: var(--radius-sm); padding: 22px 20px; }
.stat .num { font-size: 26px; font-weight: 800; letter-spacing: -.5px; }
.stat .lbl { margin-top: 8px; font-size: 12px; color: var(--on-dark-2); font-family: var(--mono); letter-spacing: 1px; }

/* 项目（白皮书式网格） */
.proj-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 24px; }
.proj-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 24px; transition: transform .2s, box-shadow .2s; }
.proj-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.proj-tag { font-family: var(--mono); font-size: 11px; letter-spacing: 1px; color: var(--accent); }
.proj-title { font-size: 19px; font-weight: 700; margin-top: 10px; }
.proj-desc { color: var(--muted); font-size: 14.5px; margin-top: 8px; }

/* 书架轮播 */
.bc-viewport { overflow: hidden; margin-top: 26px; }
.bc-track { display: flex; gap: 22px; transition: transform .55s cubic-bezier(.4,.2,.2,1); }
.bc-card { flex: 0 0 calc((100% - 88px) / 5); min-width: calc((100% - 88px) / 5); }
.bc-cover { aspect-ratio: 3/4; border-radius: 10px; overflow: hidden; box-shadow: 0 12px 26px rgba(20,21,26,.18); background: var(--paper); }
.bc-cover img { width: 100%; height: 100%; object-fit: cover; }
.bc-title { margin-top: 12px; font-size: 14.5px; font-weight: 700; }
.bc-author { font-size: 12.5px; color: var(--muted); }
.bc-controls { display: flex; align-items: center; justify-content: flex-end; gap: 14px; margin-top: 22px; }
.bc-arrow { width: 44px; height: 44px; border-radius: 50%; cursor: pointer; border: 1px solid var(--line); background: #fff; color: var(--ink); font-size: 22px; display: grid; place-items: center; transition: .2s; }
.bc-arrow:hover { border-color: var(--ink); transform: translateY(-2px); }
.bc-arrow:disabled { opacity: .3; cursor: not-allowed; transform: none; }
.bc-count { font-family: var(--mono); font-size: 13px; color: var(--muted); letter-spacing: 1px; }

/* 视频分享 */
.videos-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 24px; }
.vid-card { position: relative; border-radius: var(--radius-sm); overflow: hidden; box-shadow: 0 10px 26px rgba(20,21,26,.12); cursor: pointer; }
.vid-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; transition: transform .5s; }
.vid-card:hover img { transform: scale(1.04); }
.vid-play { position: absolute; inset: 0; display: grid; place-items: center; background: rgba(12,14,19,.28); transition: background .2s; }
.vid-card:hover .vid-play { background: rgba(12,14,19,.12); }
.vid-play span { width: 58px; height: 58px; border-radius: 50%; background: rgba(255,255,255,.92); display: grid; place-items: center; }
.vid-play span::before { content: ""; border-style: solid; border-width: 10px 0 10px 17px; border-color: transparent transparent transparent var(--ink); margin-left: 4px; }
.vid-title { position: absolute; left: 16px; bottom: 14px; right: 16px; color: #fff; font-weight: 700; font-size: 15px; text-shadow: 0 1px 6px rgba(0,0,0,.5); }

/* 同行说 */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 24px; }
.quote-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 26px; }
.quote-text { font-size: 15.5px; color: var(--ink-2); line-height: 1.7; }
.quote-who { display: flex; align-items: center; gap: 12px; margin-top: 18px; }
.q-avatar { width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-weight: 700; font-family: var(--mono); }
.q-name { font-size: 14.5px; font-weight: 700; }
.q-role { font-size: 12.5px; color: var(--muted); }

/* ---------- CTA + 页脚（深色） ---------- */
.cta { background: var(--dark); color: var(--on-dark); padding: 90px 0; }
.cta-inner { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: center; }
.cta-photo { border-radius: var(--radius); overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,.4); }
.cta-photo img { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.cta-card { background: var(--dark-2); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 44px; }
.cta-card h2 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; letter-spacing: -.5px; line-height: 1.2; }
.cta-card p { color: var(--on-dark-2); margin-top: 14px; font-size: 16px; }
.cta-actions { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 12px; }

.site-footer { background: var(--dark); color: var(--on-dark-2); border-top: 1px solid rgba(255,255,255,.07); padding: 46px 0 34px; text-align: center; }
.footer-nav { display: flex; justify-content: center; flex-wrap: wrap; gap: 24px; }
.footer-nav a { font-family: var(--mono); font-size: 12.5px; letter-spacing: 1.5px; color: var(--on-dark-2); transition: color .2s; }
.footer-nav a:hover { color: #fff; }
.footer-bottom { margin-top: 30px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.07); display: flex; flex-direction: column; gap: 10px; }
.copyright { color: var(--on-dark-2); font-size: 13.5px; }
.beian a { color: var(--on-dark-2); font-size: 13.5px; }
.beian a:hover { color: #fff; text-decoration: underline; }

/* 留言板 */
.board-toolbar { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px; display: flex; flex-direction: column; gap: 10px; max-width: 520px; }
.bt-name, .bt-text { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font: inherit; background: #fff; color: var(--ink); width: 100%; }
.bt-text { resize: vertical; min-height: 64px; }
.bt-foot { display: flex; align-items: center; justify-content: space-between; }
.bt-count { font-family: var(--mono); font-size: 12.5px; color: var(--muted); }
.board {
  position: relative; margin-top: 24px; min-height: 360px; border-radius: var(--radius-sm);
  border: 1px dashed var(--line); overflow: hidden;
  background-color: var(--paper);
  background-image: radial-gradient(rgba(20, 21, 26, .06) 1px, transparent 1px);
  background-size: 22px 22px;
}
.note {
  position: absolute; width: 200px; padding: 14px 14px 30px; border-radius: 12px;
  box-shadow: 0 10px 22px rgba(20, 21, 26, .14); cursor: grab; user-select: none;
  font-size: 14px; line-height: 1.55; color: #20242b; transition: box-shadow .2s;
}
.note.dragging { cursor: grabbing; box-shadow: 0 18px 34px rgba(20, 21, 26, .24); z-index: 20; }
.note .n-text { white-space: pre-wrap; word-break: break-word; }
.note .n-meta { position: absolute; left: 14px; right: 14px; bottom: 8px; display: flex; justify-content: space-between; align-items: center; font-family: var(--mono); font-size: 11px; color: rgba(0, 0, 0, .45); }
.note .n-del { cursor: pointer; opacity: .45; padding: 2px 4px; }
.note .n-del:hover { opacity: 1; }

/* 分屏指示器 */
.slide-indicator { position: fixed; left: 20px; bottom: 20px; z-index: 90; display: flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 999px; background: rgba(12,14,19,.9); color: var(--on-dark); font-family: var(--mono); font-size: 11.5px; letter-spacing: 1px; }
.si-sep, .si-total { opacity: .5; }
.si-name { margin-left: 6px; opacity: .85; }

/* 动画 */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; min-height: 0; }
  .hero-media { order: -1; justify-self: start; }
  .hero-photo { max-width: 320px; }
  .mod-grid, .cta-inner { grid-template-columns: 1fr; gap: 32px; }
  .mod-grid.reverse .mg-media { order: 0; }
  .proj-grid, .videos-grid, .quotes { grid-template-columns: repeat(2, 1fr); }
  .bc-card { flex-basis: calc((100% - 44px) / 3); min-width: calc((100% - 44px) / 3); }
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .nav { position: absolute; top: var(--nav-h); left: 0; right: 0; background: var(--dark); flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 20px; transform: translateY(-10px); opacity: 0; visibility: hidden; transition: .25s; }
  .nav.open { transform: none; opacity: 1; visibility: visible; }
  .nav a { padding: 13px 2px; border-bottom: 1px solid rgba(255,255,255,.08); }
  .nav-toggle { display: flex; }
  .section { padding: 60px 0; }
  .mod { padding: 30px 22px; }
  .proj-grid, .videos-grid, .quotes, .stats { grid-template-columns: 1fr; }
  .bc-card { flex-basis: 60%; min-width: 60%; }
  .slide-indicator { display: none; }
}