/* ============================================================
   logex — 全站样式
   浅色 · 白蓝粉 · 衬线为主 · 蓝图网格 · 轻旋转卡片
   ============================================================ */

:root {
  color-scheme: light;

  --paper: #FAFAF7;
  --paper-2: #F4F4EF;
  --card: #FFFFFF;
  --ink: #16181D;
  --ink-2: #585D6B;
  --ink-3: #8A8F9E;

  --blue: #2447FF;
  --blue-deep: #1630C9;
  --blue-soft: #E9EDFF;
  --blue-ghost: rgba(36, 71, 255, 0.05);

  --pink: #FF4D8D;            /* 仅用于装饰、大形、边框 */
  --pink-ink: #C22B63;        /* 小字可用的深粉（对比度 > 4.5） */
  --pink-soft: #FFE9F1;

  --line: rgba(22, 24, 29, 0.14);
  --line-strong: rgba(22, 24, 29, 0.28);
  --grid: rgba(36, 71, 255, 0.045);

  --font-display: "Fraunces", "Noto Serif SC", "Songti SC", Georgia, serif;
  --font-body: "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.32, 0.72, 0, 1);

  --tilt-scale: 1;            /* 移动端减半卡片旋转 */

  --shadow-card: 0 22px 48px -20px rgba(22, 48, 201, 0.18);
  --shadow-lift: 0 8px 24px -12px rgba(22, 24, 29, 0.16);

  --wrap: 72rem;
}

/* ---------- 基础 ---------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--paper);
  /* 蓝图网格 —— 极淡的蓝线（随页面滚动，避免 fixed 与 sticky/backdrop-filter 的合成层渲染异常） */
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 2rem 2rem;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--blue); color: var(--paper); }

img, svg { display: block; max-width: 100%; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
  touch-action: manipulation;
}

a {
  color: var(--blue);
  text-decoration: none;
  text-underline-offset: 3px;
  transition: color 160ms var(--ease-out);
}
a:hover { color: var(--blue-deep); }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem; top: -3rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.5rem 0.9rem;
  border-radius: 0 0 6px 6px;
  z-index: 200;
  transition: top 160ms var(--ease-out);
}
.skip-link:focus { top: 0; color: var(--paper); }

/* ---------- 顶部导航（唯一的半透明材质层） ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 247, 0.72);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  backdrop-filter: blur(20px) saturate(1.8);
  transition: box-shadow 240ms var(--ease-out);
}
.site-header.scrolled {
  box-shadow: 0 1px 0 var(--line), 0 12px 30px -22px rgba(22, 24, 29, 0.35);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0.8rem clamp(1rem, 4vw, 2rem);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  display: inline-flex;
  align-items: baseline;
  gap: 0.3rem;
  line-height: 1;
}
.wordmark:hover { color: var(--ink); }
.wordmark .mark-dot {
  width: 7px; height: 7px;
  background: var(--pink);
  transform: rotate(45deg) translateY(-1px);
  display: inline-block;
  transition: transform 240ms var(--ease-spring);
}
.wordmark:hover .mark-dot { transform: rotate(225deg) translateY(-1px); }

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2.5vw, 1.6rem);
}

.nav-link {
  position: relative;
  color: var(--ink-2);
  font-size: 0.92rem;
  padding: 0.3rem 0.05rem;
  background-image: linear-gradient(var(--blue), var(--blue));
  background-repeat: no-repeat;
  background-size: 0% 1.5px;
  background-position: 0 100%;
  transition: color 160ms var(--ease-out), background-size 240ms var(--ease-spring);
}
.nav-link:hover { color: var(--blue); background-size: 100% 1.5px; }
.nav-link[aria-current="page"] { color: var(--blue); background-size: 100% 1.5px; }
.nav-link .nav-idx {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin-right: 0.25rem;
  vertical-align: 0.35em;
}
.nav-link[aria-current="page"] .nav-idx,
.nav-link:hover .nav-idx { color: var(--pink); }

/* ---------- 布局容器与章节 ---------- */

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: clamp(1rem, 4vw, 2rem);
  padding-right: clamp(1rem, 4vw, 2rem);
}

.section { padding-block: clamp(3rem, 7vw, 5.5rem); }
.section + .section { border-top: 1px solid var(--line); }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: clamp(1.8rem, 4vw, 2.8rem);
}
.section-head .sec-idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--blue);
}
.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.section-head .sec-en {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.section-head .sec-rule {
  flex: 1;
  align-self: center;
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong), transparent);
}
.section-head .sec-side {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-3);
  white-space: nowrap;
}
.section-head .sec-side a { display: inline-flex; align-items: center; gap: 0.25rem; }

/* ---------- 排版 ---------- */

.overline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue);
}
.overline .ov-dim { color: var(--ink-3); }

.lede {
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  line-height: 1.9;
  color: var(--ink-2);
  max-width: 42em;
}

.mono-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-3);
}

/* ---------- 首页开头（档案规格表式） ---------- */

.masthead {
  padding-block: clamp(2.6rem, 6vw, 5rem) clamp(2.4rem, 5vw, 4rem);
}
.masthead-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.masthead h1 {
  margin: 0.9rem 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(3.4rem, 10vw, 6.8rem);
  line-height: 1;
  letter-spacing: -0.025em;
}
.masthead h1 .name-dot { color: var(--blue); }

.masthead .headline {
  margin: 1.4rem 0 0;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.005em;
  max-width: 22em;
}
.masthead .headline .hl-mark {
  background: linear-gradient(transparent 62%, var(--pink-soft) 62%);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.masthead .intro { margin: 1.1rem 0 0; }

.masthead-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

/* 元信息条 */
.meta-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
  margin-top: 2.4rem;
}
.meta-strip .stat {
  padding: 0.85rem 1rem 0.85rem 0;
}
.meta-strip .stat + .stat {
  padding-left: 1.2rem;
  border-left: 1px solid var(--line);
}
.meta-strip .stat-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.25rem;
}
.meta-strip .stat-value {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* 状态脉冲点 */
.status-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--pink);
  margin-right: 0.5rem;
  position: relative;
  vertical-align: 0.06em;
}
.status-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--pink);
  animation: pulse 2.4s var(--ease-out) infinite;
}
@keyframes pulse {
  0%   { transform: scale(0.5); opacity: 0.9; }
  80%, 100% { transform: scale(1.5); opacity: 0; }
}

/* 照片占位框 + 旋转徽章 */
.portrait-zone { position: relative; justify-self: center; width: min(100%, 22rem); }

.portrait-frame {
  position: relative;
  aspect-ratio: 4 / 5;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(var(--blue-ghost), var(--blue-ghost)),
    linear-gradient(var(--card), var(--card));
  border-radius: 6px;
  overflow: hidden;
}
.portrait-frame svg { width: 100%; height: 100%; }

.portrait-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0.8rem;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.85);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  color: var(--ink-2);
}
.portrait-caption b { color: var(--blue); font-weight: 500; }

.orbit-badge {
  position: absolute;
  right: -1.6rem;
  bottom: -1.8rem;
  width: 7rem;
  height: 7rem;
  filter: drop-shadow(0 10px 20px rgba(22, 48, 201, 0.18));
}
.orbit-badge .badge-spin {
  transform-origin: 50% 50%;
  animation: spin 28s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.masthead-coords {
  margin-top: 1.2rem;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}

/* ---------- 卡片系统（轻旋转 + 角标十字线） ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
  gap: clamp(1.2rem, 3vw, 2rem);
}

.card {
  --tilt: 0deg;
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.3rem 1.3rem 1.15rem;
  transform: rotate(calc(var(--tilt) * var(--tilt-scale)));
  transition:
    transform 260ms var(--ease-spring),
    box-shadow 260ms var(--ease-spring),
    border-color 200ms var(--ease-out);
  will-change: transform;
}
.card:hover {
  transform: rotate(0deg) translateY(-6px);
  border-color: rgba(36, 71, 255, 0.45);
  box-shadow: var(--shadow-card);
}
.card:active { transform: rotate(0deg) translateY(-3px) scale(0.985); transition-duration: 100ms; }

/* 角标十字线（悬停浮现） */
.card::before,
.card::after {
  content: "";
  position: absolute;
  width: 11px; height: 11px;
  background:
    linear-gradient(var(--blue), var(--blue)) center / 11px 1px no-repeat,
    linear-gradient(var(--blue), var(--blue)) center / 1px 11px no-repeat;
  opacity: 0;
  transition: opacity 220ms var(--ease-out);
  pointer-events: none;
}
.card::before { top: -6px; left: -6px; }
.card::after  { bottom: -6px; right: -6px; }
.card:hover::before, .card:hover::after { opacity: 1; }

.card-cover {
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: 6px;
  margin-bottom: 1.05rem;
  overflow: hidden;
  background: var(--paper);
}
.card-cover svg { width: 100%; height: 100%; transition: transform 500ms var(--ease-spring); }
.card:hover .card-cover svg { transform: scale(1.045); }

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  margin-bottom: 0.5rem;
}
.card-top .card-idx { color: var(--blue); }
.card-top .card-year { }

.card h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.28rem;
  line-height: 1.35;
  letter-spacing: -0.005em;
}
.card h3 a { color: inherit; }
.card h3 a:hover { color: var(--blue); }

.card-desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--ink-2);
  flex: 1;
}
.card-kicker {
  margin: 0.2rem 0 0.5rem;
  color: var(--blue);
  font: 0.7rem/1.5 var(--font-mono);
  letter-spacing: 0.04em;
}

.card-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--line);
}

.tag-row { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  padding: 0.14rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-2);
  background: var(--paper);
}

.card-go {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  white-space: nowrap;
}
.card-go svg { transition: transform 220ms var(--ease-spring); }
.card:hover .card-go svg { transform: translateX(4px); }

.featured-mark {
  position: absolute;
  top: -9px; right: 14px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.12rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--ink-2);
}
.featured-mark .fm-dot {
  width: 6px; height: 6px;
  background: var(--pink);
  transform: rotate(45deg);
}

/* 空状态 */
.empty-note {
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
  padding: 2rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--ink-3);
}

/* ---------- 筛选 chips ---------- */

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.chip {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  padding: 0.42rem 0.95rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  transition: background 160ms var(--ease-out), color 160ms var(--ease-out), border-color 160ms var(--ease-out), transform 100ms var(--ease-out);
}
.chip:hover { border-color: var(--blue); color: var(--blue); }
.chip:active { transform: scale(0.96); }
.chip[aria-pressed="true"] {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.chip .chip-n { opacity: 0.65; margin-left: 0.3rem; font-size: 0.66rem; }

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 0.68rem 1.25rem;
  border-radius: 8px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 170ms var(--ease-out), color 170ms var(--ease-out), border-color 170ms var(--ease-out), transform 100ms var(--ease-out), box-shadow 170ms var(--ease-out);
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:active { transform: scale(0.97); }
.btn svg { transition: transform 220ms var(--ease-spring); }
.btn:hover svg { transform: translateX(3px); }

.btn-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.btn-primary:hover {
  background: var(--blue-deep);
  border-color: var(--blue-deep);
  color: #fff;
  box-shadow: 0 12px 26px -14px rgba(36, 71, 255, 0.7);
}

.btn-quiet {
  border-color: var(--line-strong);
  color: var(--ink-2);
}
.btn-quiet:hover { background: var(--paper-2); color: var(--ink); border-color: var(--line-strong); }

.btn-sm { padding: 0.42rem 0.85rem; font-size: 0.7rem; }
.btn-danger { border-color: var(--line-strong); color: var(--pink-ink); }
.btn-danger:hover { background: var(--pink-soft); border-color: var(--pink-ink); color: var(--pink-ink); }

/* ---------- 平台卡 ---------- */

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: clamp(1rem, 3vw, 1.6rem);
}

.platform-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.1rem 1.2rem;
  color: var(--ink);
  --tilt: 0deg;
  transform: rotate(calc(var(--tilt) * var(--tilt-scale)));
  transition: transform 260ms var(--ease-spring), border-color 200ms var(--ease-out), box-shadow 260ms var(--ease-spring);
}
.platform-card:hover {
  transform: rotate(0deg) translateY(-4px);
  border-color: rgba(36, 71, 255, 0.45);
  box-shadow: var(--shadow-lift);
  color: var(--ink);
}
.platform-card:active { transform: rotate(0deg) translateY(-2px) scale(0.985); transition-duration: 100ms; }

.p-icon {
  flex: none;
  width: 3.2rem; height: 3.2rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  transition: border-color 200ms var(--ease-out), color 200ms var(--ease-out), background 200ms var(--ease-out);
}
.platform-card:hover .p-icon { border-color: var(--blue); color: var(--blue); background: var(--blue-soft); }
.p-icon svg { width: 1.5rem; height: 1.5rem; }
.p-icon .draw {
  stroke-dasharray: 100;
  stroke-dashoffset: 0;
}
.platform-card:hover .p-icon .draw { animation: redraw 0.7s var(--ease-out) both; }
@keyframes redraw { from { stroke-dashoffset: 100; } to { stroke-dashoffset: 0; } }

.p-body { min-width: 0; }
.p-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.3;
}
.p-handle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--ink-3);
  margin-top: 0.1rem;
}
.p-note { font-size: 0.8rem; color: var(--ink-2); margin-top: 0.25rem; }
.p-arrow { margin-left: auto; flex: none; color: var(--ink-3); transition: transform 220ms var(--ease-spring), color 200ms; }
.platform-card:hover .p-arrow { transform: translateX(4px); color: var(--blue); }

/* ---------- 动态列表 ---------- */

.update-list { list-style: none; margin: 0; padding: 0; }
.update-list li {
  display: flex;
  gap: 1.2rem;
  align-items: baseline;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
}
.update-list li:first-child { border-top: 1px solid var(--line); }
.update-date {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--blue);
  min-width: 6.2em;
}
.update-text { font-size: 0.95rem; color: var(--ink); }
.update-link { margin-left: auto; flex: none; }

/* ---------- 关于与工作方式 ---------- */

.about-lede {
  max-width: 52rem;
  margin: 0 0 1.6rem;
  color: var(--ink-2);
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.9;
}
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.principle-card {
  min-height: 12rem;
  padding: 1.2rem;
  border: 1px solid var(--line);
  background: var(--card);
}
.principle-card .card-idx { color: var(--pink-ink); }
.principle-card h3 { margin: 2.4rem 0 0.65rem; font-size: 1.05rem; }
.principle-card p { margin: 0; color: var(--ink-2); font-size: 0.9rem; line-height: 1.75; }
.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(16rem, 0.8fr);
  gap: clamp(1.5rem, 5vw, 5rem);
  align-items: start;
}
.about-copy h2,
.about-contact-panel h2 {
  margin: 0.5rem 0 1rem;
  font-size: clamp(1.6rem, 3vw, 2.5rem);
}
.now-card {
  padding: 1.3rem;
  border: 1px solid rgba(36, 71, 255, 0.35);
  background: var(--blue-soft);
  box-shadow: var(--shadow-paper);
}
.now-card p:last-child { margin: 1rem 0 0; color: var(--ink-2); line-height: 1.8; }
.focus-list { border-top: 1px solid var(--line); }
.focus-item {
  display: grid;
  grid-template-columns: 4rem minmax(10rem, 0.7fr) minmax(0, 1.5fr);
  gap: 1rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.focus-item h3,
.focus-item p { margin: 0; }
.focus-item h3 { font-size: 1rem; }
.focus-item p { color: var(--ink-2); line-height: 1.75; }
.about-contact-panel {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: clamp(3rem, 7vw, 6rem);
  padding-top: clamp(2rem, 5vw, 4rem);
  padding-bottom: clamp(2rem, 5vw, 4rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.about-contact-panel p:last-child { max-width: 42rem; color: var(--ink-2); }
.about-actions { display: flex; flex-wrap: wrap; gap: 0.65rem; flex: none; }

/* ---------- 项目案例详情 ---------- */

.project-hero {
  padding-top: clamp(4rem, 9vw, 8rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
}
.back-link {
  display: inline-flex;
  margin-bottom: 2.4rem;
  color: var(--ink-3);
  font: 0.72rem/1.5 var(--font-mono);
  letter-spacing: 0.06em;
}
.project-hero h1 {
  max-width: 18ch;
  margin: 0.55rem 0 1.2rem;
  font-size: clamp(2.8rem, 9vw, 7.4rem);
  line-height: 0.98;
}
.project-summary {
  max-width: 48rem;
  margin: 0 0 1.4rem;
  color: var(--ink-2);
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2.2vw, 1.45rem);
  line-height: 1.85;
}
.project-meta-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 2.4rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.project-meta-grid > div {
  min-width: 0;
  padding: 1rem;
  border-right: 1px solid var(--line);
}
.project-meta-grid > div:last-child { border-right: none; }
.project-meta-grid .stat-label,
.project-meta-grid .stat-value { display: block; }
.project-meta-grid .stat-value { margin-top: 0.35rem; overflow-wrap: anywhere; }
.case-section {
  display: grid;
  grid-template-columns: minmax(10rem, 0.55fr) minmax(0, 1.45fr);
  gap: clamp(2rem, 7vw, 7rem);
  padding-top: clamp(3rem, 7vw, 6rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--line);
}
.case-label {
  position: sticky;
  top: 6rem;
  align-self: start;
}
.case-label span { color: var(--blue); font: 0.72rem/1.5 var(--font-mono); }
.case-label h2 { margin: 0.55rem 0 0; font-size: clamp(1.35rem, 2.5vw, 2rem); }
.case-content { max-width: 50rem; }
.case-content h3 { margin: 2.2rem 0 0.7rem; font-size: 1rem; }
.case-content h3:first-child { margin-top: 0; }
.case-content > p { color: var(--ink-2); line-height: 1.85; }
.case-list,
.process-list { margin: 0; padding-left: 1.25rem; color: var(--ink-2); }
.case-list li,
.process-list li { margin-bottom: 0.7rem; line-height: 1.75; }
.case-list li::marker,
.process-list li::marker { color: var(--blue); font-family: var(--font-mono); }
.decision-list { list-style: none; padding: 0; }
.decision-list li {
  padding: 0.9rem 1rem;
  border-left: 3px solid var(--pink);
  background: var(--pink-soft);
}
.evidence-list { display: grid; gap: 0.75rem; }
.evidence-item { padding: 1rem; border: 1px solid var(--line); background: var(--card); }
.evidence-item > a,
.evidence-item > span { font-weight: 600; }
.evidence-item p { margin: 0.45rem 0 0; color: var(--ink-2); font-size: 0.88rem; }
.project-external { margin-top: 1rem; }
.project-next {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  padding-bottom: clamp(4rem, 8vw, 7rem);
  border-top: 1px solid var(--line);
}

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper-2);
  margin-top: clamp(2rem, 5vw, 4rem);
}
.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4rem) clamp(1rem, 4vw, 2rem) 1.5rem;
}
.footer-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  letter-spacing: -0.02em;
  line-height: 1;
  margin: 0 0 0.4rem;
}
.footer-name .name-dot { color: var(--pink); }
.footer-sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 2rem;
}

.footer-contacts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 2.4rem;
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  color: var(--ink);
  font-size: 0.85rem;
  background: var(--card);
  white-space: nowrap;
  transition: border-color 170ms var(--ease-out), color 170ms var(--ease-out), transform 100ms var(--ease-out), box-shadow 170ms var(--ease-out);
}
.contact-link svg { color: var(--blue); }
.contact-link:hover { border-color: var(--blue); color: var(--blue); box-shadow: var(--shadow-lift); }
.contact-link:active { transform: scale(0.97); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1.6rem;
  border-top: 1px solid var(--line);
  padding-top: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
}
.footer-bottom a { color: var(--ink-2); }
.footer-bottom a:hover { color: var(--blue); }

.error-page {
  min-height: 64vh;
  display: grid;
  place-content: center;
  justify-items: start;
  gap: 1.3rem;
}

.error-page h1 {
  margin: 0;
  font-size: clamp(3rem, 10vw, 7rem);
}

/* ---------- 滚动显现 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 550ms var(--ease-out), transform 550ms var(--ease-out);
  transition-delay: var(--d, 0ms);
}
.reveal.in { opacity: 1; transform: none; }
/* 卡片自身有 transform（旋转），显现时只动 opacity */
.card.reveal, .platform-card.reveal { transform: rotate(calc(var(--tilt) * var(--tilt-scale))); }
.card.reveal.in, .platform-card.reveal.in { transform: rotate(calc(var(--tilt) * var(--tilt-scale))); }
.card.reveal, .platform-card.reveal { opacity: 0; }
.card.reveal.in, .platform-card.reveal.in { opacity: 1; }

/* ---------- 页面头部（子页） ---------- */

.page-head { padding-block: clamp(2.4rem, 5vw, 4rem) clamp(1.6rem, 3vw, 2.4rem); }
.page-head h1 {
  margin: 0.8rem 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.page-head .page-sub {
  margin: 0.8rem 0 0;
  color: var(--ink-2);
  max-width: 40em;
}

/* ---------- CV 页 ---------- */

.cv-page-head {
  padding-block: clamp(1.4rem, 2.5vw, 2rem) clamp(1rem, 2vw, 1.5rem);
}
.cv-page-head h1 {
  margin-top: 0.55rem;
  font-size: clamp(2.2rem, 4.5vw, 3rem);
}
.cv-page-head .page-sub { margin-top: 0.55rem; }
.cv-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.1rem;
}
.cv-hint {
  margin-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--ink-3);
}

.cv-paper {
  width: min(100%, 58rem);
  margin-inline: auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: clamp(1.5rem, 5vw, 4.25rem);
  box-shadow: 0 32px 80px -52px rgba(22, 24, 29, 0.36);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Noto Sans CJK SC", sans-serif;
}

.cv-mast {
  padding-bottom: clamp(2rem, 5vw, 3.6rem);
}
.cv-mast-label,
.cv-kicker {
  margin: 0;
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.cv-mast-label span { color: var(--ink-3); }
.cv-mast h2 {
  margin: 0.7rem 0 0;
  color: var(--ink);
  font-family: inherit;
  font-size: clamp(2.8rem, 8vw, 5.25rem);
  font-weight: 760;
  letter-spacing: -0.055em;
  line-height: 0.98;
}
.cv-headline {
  max-width: 36em;
  margin: 1rem 0 0;
  color: var(--ink);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 650;
  letter-spacing: -0.015em;
  line-height: 1.45;
}

.cv-contact-list {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.55rem 1.25rem;
  list-style: none;
  margin: 1.7rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--line);
}
.cv-contact-list li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  min-width: 0;
  color: var(--ink-2);
  font-size: 0.84rem;
}
.cv-contact-list .k {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
}
.cv-contact-list a {
  color: var(--ink);
  text-decoration-color: rgba(36, 71, 255, 0.3);
  text-underline-offset: 0.2em;
}
.cv-contact-list a:hover { color: var(--blue); }

.cv-summary-block {
  margin: 0 0 clamp(3rem, 7vw, 5rem);
  padding: clamp(1.25rem, 3vw, 1.8rem);
  border: 1px solid rgba(36, 71, 255, 0.14);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(36, 71, 255, 0.065), rgba(36, 71, 255, 0.018));
}
.cv-summary-block h2 {
  margin: 0.45rem 0 0;
  color: var(--ink);
  font-family: inherit;
  font-size: 1.15rem;
  font-weight: 720;
  letter-spacing: -0.015em;
}
.cv-summary {
  max-width: 48em;
  margin: 0.7rem 0 0;
  color: var(--ink-2);
  font-size: clamp(0.96rem, 1.5vw, 1.06rem);
  line-height: 1.8;
}

.cv-flow {
  display: block;
  max-width: 48rem;
}
.cv-block {
  margin: 0;
  padding: clamp(2.5rem, 6vw, 4rem) 0;
  border-top: 1px solid var(--line);
}
.cv-block:first-child {
  padding-top: 0;
  border-top: 0;
}
.cv-section-head {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin: 0 0 1.8rem;
}
.cv-section-head .cv-idx {
  flex: 0 0 auto;
  margin-top: 0.25rem;
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
}
.cv-section-head h2 {
  margin: 0;
  color: var(--ink);
  font-family: inherit;
  font-size: clamp(1.55rem, 3vw, 2rem);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.cv-section-head p {
  margin: 0.3rem 0 0;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.cv-item {
  position: relative;
  padding: 0 0 1.7rem 1.5rem;
  margin: 0 0 1.7rem;
  border-bottom: 1px solid rgba(22, 24, 29, 0.1);
}
.cv-item::before {
  content: "";
  position: absolute;
  top: 0.42rem;
  left: 0;
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 5px rgba(36, 71, 255, 0.08);
}
.cv-item:last-child { border-bottom: none; padding-bottom: 0; margin-bottom: 0; }
.cv-period {
  margin: 0 0 0.45rem;
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.09em;
}
.cv-item-title {
  margin: 0;
  color: var(--ink);
  font-family: inherit;
  font-size: clamp(1.05rem, 2vw, 1.18rem);
  font-weight: 720;
  letter-spacing: -0.015em;
  line-height: 1.35;
}
.cv-org {
  margin: 0.25rem 0 0;
  color: var(--ink-2);
  font-size: 0.9rem;
  font-weight: 540;
}
.cv-points {
  margin: 0.9rem 0 0;
  padding-left: 1.15rem;
  color: var(--ink-2);
  font-size: 0.92rem;
  line-height: 1.7;
}
.cv-points li { margin-bottom: 0.45rem; }
.cv-points li:last-child { margin-bottom: 0; }
.cv-points li::marker { color: var(--blue); }

.skill-group { margin: 0 0 1.4rem; }
.skill-group:last-child { margin-bottom: 0; }
.skill-group .sg-name {
  margin: 0 0 0.7rem;
  color: var(--ink);
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 680;
  letter-spacing: -0.01em;
}
.cv-paper .tag {
  border-color: rgba(36, 71, 255, 0.14);
  background: rgba(36, 71, 255, 0.055);
  color: var(--ink-2);
}
.cv-foot .mono-note {
  margin: 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 0.64rem;
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.4rem;
  transform: translate(-50%, 1.4rem);
  z-index: 180;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  padding: 0.7rem 1.15rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms var(--ease-out), transform 240ms var(--ease-spring);
  box-shadow: 0 18px 44px -18px rgba(22, 24, 29, 0.55);
  max-width: min(92vw, 34rem);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.toast .toast-action {
  background: none;
  border: 1px solid rgba(250, 250, 247, 0.35);
  color: #A9B8FF;
  border-radius: 6px;
  padding: 0.25rem 0.7rem;
  font-family: inherit;
  font-size: 0.72rem;
  cursor: pointer;
  transition: border-color 150ms, color 150ms;
}
.toast .toast-action:hover { border-color: #A9B8FF; color: #fff; }

/* ---------- 页首装饰（子页通用角标） ---------- */

.corner-marks { position: absolute; inset: 0; pointer-events: none; }
.corner-marks span {
  position: absolute;
  width: 12px; height: 12px;
  background:
    linear-gradient(var(--blue), var(--blue)) center / 12px 1px no-repeat,
    linear-gradient(var(--blue), var(--blue)) center / 1px 12px no-repeat;
  opacity: 0.55;
}
.corner-marks .cm-tl { top: 1rem; left: 1rem; }
.corner-marks .cm-br { bottom: 1rem; right: 1rem; }

/* ---------- 响应式 ---------- */

@media (max-width: 860px) {
  :root { --tilt-scale: 0.5; }

  .masthead-grid { grid-template-columns: 1fr; gap: 2.4rem; }
  .portrait-zone { width: min(100%, 18rem); justify-self: start; margin-left: 1.5rem; }
  .meta-strip { grid-template-columns: 1fr; }
  .meta-strip .stat + .stat { border-left: none; border-top: 1px solid var(--line); padding-left: 0; padding-top: 0.85rem; }
  .section-head { flex-wrap: wrap; }
  .section-head .sec-rule { display: none; }
  .nav-link .nav-idx { display: none; }
  .update-list li { flex-wrap: wrap; gap: 0.3rem 1.2rem; }
  .update-link { margin-left: 0; }
  /* 触控目标 ≥44px：导航用透明命中区（不撑高顶栏、下划线仍贴文字），联系胶囊直接加高 */
  .nav-link::before {
    content: "";
    position: absolute;
    left: -0.35rem; right: -0.35rem;
    top: 50%; height: 44px;
    transform: translateY(-50%);
  }
  .contact-link { min-height: 44px; }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-card { min-height: 0; }
  .principle-card h3 { margin-top: 1.5rem; }
  .about-layout,
  .case-section { grid-template-columns: 1fr; }
  .case-label { position: static; }
  .project-meta-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .project-meta-grid > div:nth-child(2) { border-right: none; }
  .project-meta-grid > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .focus-item { grid-template-columns: 3rem 1fr; }
  .focus-item p { grid-column: 2; }
  .about-contact-panel { align-items: start; flex-direction: column; }
}

@media (max-width: 480px) {
  .header-inner { gap: 0.8rem; }
  .site-nav { gap: 0.55rem; }
  .cv-paper {
    border-radius: 14px;
    padding: 1.35rem 1.15rem;
  }
  .cv-contact-list {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.55rem;
  }
  .cv-page-head { padding-block: 1.2rem 0.9rem; }
  .cv-summary-block { padding: 1.15rem; }
  .cv-section-head { margin-bottom: 1.45rem; }
  .cv-item { padding-left: 1.25rem; }
  .orbit-badge { right: -0.6rem; }
  .project-meta-grid { grid-template-columns: 1fr; }
  .project-meta-grid > div,
  .project-meta-grid > div:nth-child(2) { border-right: none; border-bottom: 1px solid var(--line); }
  .project-meta-grid > div:last-child { border-bottom: none; }
  .project-next { align-items: stretch; flex-direction: column; }
}

/* ---------- 动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .card.reveal, .platform-card.reveal { transform: rotate(calc(var(--tilt) * var(--tilt-scale))); }
  .orbit-badge .badge-spin, .status-dot::after { animation: none; }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header {
    background: #fff;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
}